Rebar fusion type coupler using flux

Abstract

The utility model relates to a reinforcing steel bar fusion type coupler using flux, which comprises a coupler body, a shielding ring, an aluminum block, upper reinforcing steel bars and lower reinforcing steel bars in butt joint, and a butt joint is formed between the bottom end of the upper reinforcing steel bars and the top end of the lower reinforcing steel bars; the coupler body is circular, the coupler body is sleeved on the top of the lower reinforcing steel bars, and a containing groove is arranged on the inner top of the coupler body; the shielding ring is circular, the shielding ring is sleeved on the bottom of the upper reinforcing steel bars, and a plurality of notches are arranged on the bottom end of the shielding ring; the aluminum block is clamped between the upper reinforcing steel bars and the lower reinforcing steel bars, and flux is applied to the butt joint and the containing groove around the aluminum block to form an air shielding ring. The utility model has the beneficial effects that the flux is applied to the butt joint and the containing groove around the aluminum block to form an air shielding ring, which prevents the reaction between air and dissolved carbon in the reinforcing steel bars during welding to generate carbon dioxide bubbles, reduces the number and size of the bubbles in the butt joint, and improves the tensile strength and shock resistance of the weld joint between the upper reinforcing steel bars and the lower reinforcing steel bars.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a steel bar welding coupler using flux. Background Technology

[0002] Reinforcing bars are used as the internal framework of concrete structures in the construction or civil engineering field. Reinforcing bars are generally of fixed length and specifications. When used, multiple reinforcing bars are connected together according to the length or height requirements of the structure. The existing methods of connecting reinforcing bars mainly include binding with tie wire, mechanical connection using extrusion sleeves or threaded sleeves, and welding.

[0003] However, in existing welding technology, the carbon dissolved in the steel bar reacts with oxygen in the air to produce carbon dioxide. If the carbon dioxide cannot be expelled, it will cause bubbles to form in the weld of the steel bar. During earthquake vibration, the bubbles will form tensile forces in the vertical and horizontal directions, causing the steel bar to break at the weld. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned problems in the existing technology and to provide a steel bar welding coupler that uses flux.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] A flux-assisted rebar welding coupler includes upper and lower rebars joined together, with a butt joint formed between the bottom end of the upper rebar and the top end of the lower rebar, and further includes:

[0007] The coupler body is circular and fits on the top of the lower reinforcing bar. A receiving groove is provided on the top inner side of the coupler body.

[0008] A shielding ring, which is circular, is fitted around the bottom of the upper reinforcing bar, and has several evenly distributed notches at its bottom end.

[0009] An aluminum block is sandwiched between an upper and a lower reinforcing bar. Flux is applied to the butt joints and receiving grooves around the aluminum block to form an air shield.

[0010] When the coupler body is fitted onto the top of the lower reinforcing bar, the top end of the coupler body is flush with the top end of the lower reinforcing bar.

[0011] In a preferred embodiment, the gap between the lower inner part of the coupler body and the lower reinforcing bar is filled with clay to form a clay sealing ring.

[0012] The cross-section of the notch is an isosceles trapezoid, a semicircle, or a rectangle.

[0013] The aluminum block is either a cylinder or a hemisphere.

[0014] The beneficial effects of this utility model are: by applying flux to the butt joint and receiving groove around the aluminum block to form an air shield ring, it prevents the air in the butt joint from reacting with the carbon dissolved in the steel bar to produce carbon dioxide bubbles during welding, thereby reducing the number and size of bubbles generated in the butt joint and improving the tensile strength and seismic resistance of the weld between the upper and lower steel bars. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the assembly of the steel bar welding coupler in Embodiment 1 of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the coupler body and the shielding ring combination in Embodiment 1 of this utility model;

[0018] Figure 3 This is a schematic diagram of the coupler body in Embodiment 1 of this utility model;

[0019] Figure 4 This is a schematic diagram of the shielding ring in Embodiment 1 of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the aluminum block sandwiched between the upper and lower reinforcing bars in Embodiment 1 of this utility model;

[0021] The following are the labels in the diagram: Coupler body 1, receiving groove 11, shielding ring 2, notch 21, aluminum block 3, air shielding ring 4, upper steel bar 100, lower steel bar 200, butt joint 300. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 5 The first embodiment shown is a steel bar welding coupler using flux, which includes a coupler body 1, a shielding ring 2, an aluminum block 3, an upper steel bar 100 and a lower steel bar 200. The coupler body 1 is annular, the shielding ring 2 is annular, and the aluminum block 3 is cylindrical.

[0024] The upper reinforcing bar 100 and the lower reinforcing bar 200 are joined together vertically, and the upper reinforcing bar 100 and the lower reinforcing bar 200 are coaxial. A joint 300 is formed between the bottom end of the upper reinforcing bar 100 and the top end of the lower reinforcing bar 200.

[0025] The coupler body 1 is fitted on top of the lower reinforcing bar 200, and the top of the coupler body 1 is flush with the top of the lower reinforcing bar 200; the shielding ring 2 is fitted on the bottom of the upper reinforcing bar 100; the aluminum block 3 is sandwiched between the upper and lower reinforcing bars, and the aluminum block 3 is located at the center of the top of the lower reinforcing bar.

[0026] A receiving groove 11 is provided on the inner top of the coupler body 1, and flux is applied to the butt joint 300 around the aluminum block 3 and the receiving groove 11 to form an air shield ring 4.

[0027] The bottom end of the shielding ring 2 has several evenly distributed notches 21, and the cross-section of the notches 21 is an isosceles trapezoid. The notches 21 are for the discharge of electric arc and molten iron generated during welding.

[0028] Specific construction process:

[0029] The first step is to place the coupler body on top of the lower reinforcing bar in the concrete column at the construction site, and then use clamps to clamp the coupler body onto the lower reinforcing bar.

[0030] The second step is to position the aluminum block at the top center of the lower reinforcing bar;

[0031] The third step is to apply flux around the aluminum block and into the receiving groove;

[0032] The fourth step is to position the shielding ring on the top of the coupler body and clamp the shielding ring to the coupler body with a clip.

[0033] Fifth step: Insert the bottom of the upper rebar into the shielding ring from top to bottom, so that the bottom end of the upper rebar matches the top end of the lower rebar to clamp the aluminum body. Then, connect the "+" terminal and "-" terminal of the welding machine to the upper rebar and the lower rebar respectively, turn on the welding machine to let the current flow through the upper rebar, aluminum block and lower rebar, thereby generating an electric arc to fuse the upper rebar and the lower rebar. The bottom of the upper rebar and the top of the lower rebar each melt 3~4mm to fuse the upper rebar and the lower rebar. At this time, the aluminum block acts as a catalyst to join the upper rebar and the lower rebar. The flux prevents oxygen in the air from reacting with carbon.

[0034] Step 6: Remove the clamps and use an object to impact the coupler body and shielding ring to separate them from the upper and lower reinforcing bars.

[0035] Example 2: A steel bar welding coupler using flux includes a coupler body 1, a shielding ring 2, an aluminum block 3, an upper steel bar 100 and a lower steel bar 200. The coupler body 1 is annular, the shielding ring 2 is annular, and the aluminum block 3 is hemispherical.

[0036] The upper reinforcing bar 100 and the lower reinforcing bar 200 are joined together vertically, and the upper reinforcing bar 100 and the lower reinforcing bar 200 are coaxial. A joint 300 is formed between the bottom end of the upper reinforcing bar 100 and the top end of the lower reinforcing bar 200.

[0037] The coupler body 1 is fitted on top of the lower reinforcing bar 200, and the top of the coupler body 1 is flush with the top of the lower reinforcing bar 200; the shielding ring 2 is fitted on the bottom of the upper reinforcing bar 100; the aluminum block 3 is sandwiched between the upper and lower reinforcing bars, and the aluminum block 3 is located at the center of the top of the lower reinforcing bar.

[0038] A receiving groove 11 is provided on the inner top of the coupler body 1, and flux is applied to the butt joint 300 around the aluminum block 3 and the receiving groove 11 to form an air shield ring 4.

[0039] The bottom end of the shielding ring 2 has several evenly distributed notches 21, and the cross-section of the notches 21 is semi-circular. The notches 21 are for the discharge of electric arc and molten iron generated during welding.

[0040] Example 3: A steel bar welding coupler using flux includes a coupler body 1, a shielding ring 2, an aluminum block 3, an upper steel bar 100 and a lower steel bar 200. The coupler body 1 is annular, the shielding ring 2 is annular, and the aluminum block 3 is cylindrical.

[0041] The upper reinforcing bar 100 and the lower reinforcing bar 200 are joined together vertically, and the upper reinforcing bar 100 and the lower reinforcing bar 200 are coaxial. A joint 300 is formed between the bottom end of the upper reinforcing bar 100 and the top end of the lower reinforcing bar 200.

[0042] The coupler body 1 is fitted on top of the lower reinforcing bar 200, and the top of the coupler body 1 is flush with the top of the lower reinforcing bar 200; the shielding ring 2 is fitted on the bottom of the upper reinforcing bar 100; the aluminum block 3 is sandwiched between the upper and lower reinforcing bars, and the aluminum block 3 is located at the center of the top of the lower reinforcing bar.

[0043] A receiving groove 11 is provided on the inner top of the coupler body 1, and flux is applied to the butt joint 300 around the aluminum block 3 and the receiving groove 11 to form an air shield ring 4.

[0044] The bottom end of the shielding ring 2 has several evenly distributed notches 21, and the cross-section of the notches 21 is rectangular. The notches 21 are for the discharge of electric arc and molten iron generated during welding.

[0045] The gap between the lower inner part of the coupler body 1 and the lower reinforcing bar 200 is filled with clay to form a clay sealing ring to prevent the applied flux from flowing out from the gap between the lower inner part of the coupler body 1 and the lower reinforcing bar 200.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A rebar fusion coupling using flux, comprising upper and lower rebars joined together, wherein a butt joint is formed between the bottom end of the upper rebar and the top end of the lower rebar, characterized in that, Also includes: The coupler body is circular and fits on the top of the lower reinforcing bar. A receiving groove is provided on the top inner side of the coupler body. A shielding ring, which is circular, is fitted around the bottom of the upper reinforcing bar, and has several evenly distributed notches at its bottom end. An aluminum block is sandwiched between an upper and a lower reinforcing bar. Flux is applied to the butt joints and receiving grooves around the aluminum block to form an air shield.

2. The steel bar fusion coupling according to claim 1, characterized in that: When the coupler body is fitted onto the top of the lower reinforcing bar, the top end of the coupler body is flush with the top end of the lower reinforcing bar.

3. The steel bar fusion coupling according to claim 1, characterized in that: The gap between the lower inner part of the coupler body and the lower reinforcing bar is filled with clay to form a clay sealing ring.

4. The steel bar fusion coupling according to claim 1, characterized in that: The cross-section of the notch is an isosceles trapezoid, a semicircle, or a rectangle.

5. The steel bar fusion coupling according to claim 1, characterized in that: The aluminum block is a cylinder or a hemisphere.

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