Aluminum busbar welding die with exhaust fume collecting hood

Abstract

The utility model discloses an aluminum bus welding die with a smoke collecting hood, which comprises an aluminum bus to be welded, a graphite plate fixed around the aluminum bus to be welded and a crucible, the bottom surface of an accommodating cavity in the crucible is arranged to be concave, and the end part of a flow guide pipe penetrates through the graphite plate on the front surface of the aluminum bus to be welded and then is contacted with the surface defect of the aluminum bus to be welded; an arc-shaped blocking cover is installed on the inner wall of the exhaust fume collecting hood in a sliding mode through a sliding groove, a suction fan is installed on a top cover of the exhaust fume collecting hood, and an exhaust pipe is connected to the top end of the suction fan. According to the scheme, the exhaust fume collecting hood with the front face open structure is arranged on the crucible and serves as a blocking cover mechanism, the arc-shaped blocking cover is installed in the exhaust fume collecting hood in a sliding mode, the suction fan is installed on a top cover of the exhaust fume collecting hood, the top end of the suction fan is connected with the exhaust pipe, the whole exhaust fume collecting hood is fixedly connected with the crucible in a sleeved mode through threads, cleaning after the exhaust fume collecting hood is detached is convenient, and the service life of the exhaust fume collecting hood is prolonged. And the impression that a large amount of smoke and fire light in the aluminothermic reaction process in the crucible injure surrounding workers is avoided.

Description

Technical Field

[0001] This utility model relates to the field of aluminum busbar surface defect repair technology, specifically an aluminum busbar welding mold with a smoke hood. Background Technology

[0002] Aluminum busbars are frequently damaged accidentally during production. There are currently two main methods for welding aluminum busbars: one is gas welding, but this method is only suitable for welding thin plates and is inefficient, limiting its practical application to localized repairs of flexible aluminum strips; the other is arc welding. However, due to the presence of a strong magnetic field, sparks fly everywhere during arc ignition, failing to form an arc column. This results in severe arc blow and spatter, increasing labor intensity and construction difficulty, and making effective welding impossible. Welding aluminum busbars using a self-propagating reaction method, by introducing molten metal to the surface defects of the aluminum busbar, can avoid these problems.

[0003] When welding aluminum busbars via a self-propagating reaction, the crucible will experience intense exothermic reaction, generating molten metal, producing large amounts of smoke and sparks, and even splashing out, which can disturb and injure nearby workers, posing a certain safety risk. Utility Model Content

[0004] The purpose of this invention is to provide an aluminum busbar welding mold with a fume hood to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an aluminum busbar welding mold with a fume hood, comprising an aluminum busbar to be welded, graphite plates fixed around the aluminum busbar to be welded, and a crucible. The number of graphite plates is four, and the four graphite plates are respectively located on the front, back, left, and right sides of the aluminum busbar to be welded. The graphite plates on the front and back sides are fixedly attached to the aluminum busbar to be welded, and the graphite plates on the left and right sides are provided with limit mechanisms on their outer sides.

[0006] The limiting mechanism includes a fixed seat and a lead screw. The end of the lead screw passes through the fixed seat and abuts against the graphite plates on the left and right sides of the aluminum busbar to be welded.

[0007] The crucible is located on the outside of the aluminum busbar to be welded. The crucible has a cylindrical can structure. The bottom surface of the internal cavity of the crucible is concave. A self-fluxing pad is provided in the center of the concave surface. A guide pipe is connected to the flow channel port at the bottom end of the self-fluxing pad. The end of the guide pipe passes through the graphite plate on the front of the aluminum busbar to be welded and contacts the surface defect of the aluminum busbar to be welded.

[0008] The top of the crucible is provided with a cover mechanism, which includes a smoke collection hood with a front opening structure. The smoke collection hood is a cylindrical structure with a front notch. An arc-shaped cover is slidably installed on the inner wall of the smoke collection hood through a sliding groove. A cylindrical protrusion is provided on the outer surface of the arc-shaped cover. A suction fan is installed on the top cover of the smoke collection hood, and an exhaust pipe is connected to the top of the suction fan.

[0009] Preferably, a filter screen is installed on the inner top surface of the smoke hood and at the connection point with the suction fan. The smoke hood is fixedly fitted onto the crucible by threads, and the suction fan is connected to an external power source.

[0010] Preferably, the guide tube is inclined from top to bottom.

[0011] Preferably, the arc-shaped cover is located at the opening on the front of the smoke collection hood. Beneficial effects

[0012] This utility model provides an aluminum busbar welding mold with a fume hood, which has the following advantages:

[0013] In this design, a fume hood with a front opening structure is installed on the crucible as a cover mechanism. An arc-shaped cover is slidably installed inside the fume hood, and a suction fan is installed on the top cover of the fume hood. The top of the suction fan is connected to the exhaust pipe. The entire fume hood is fixedly connected to the crucible by threads, which facilitates cleaning after the fume hood is disassembled and avoids the impression that a large amount of smoke and fire during the aluminothermic reaction in the crucible will cause harm to the surrounding workers.

[0014] The molten metal generated by the aluminothermic reaction in the crucible melts the self-fluxing pad at high temperature, and then flows directly from the bottom through the guide pipe to the surface defects of the aluminum busbar to be welded, thus achieving the effect of repairing the aluminum busbar to be welded. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an enlarged schematic diagram of the connection structure between the crucible and the fume hood of this utility model;

[0017] Figure 3 This is a cross-sectional view of the internal structure of the smoke collection hood of this utility model;

[0018] In the diagram: 1. Aluminum busbar to be welded; 2. Graphite plate; 3. Crucible; 4. Fixing base; 5. Lead screw; 6. Self-fluxing gasket; 7. Guide pipe; 8. Fume hood; 9. Arc-shaped baffle; 10. Cylindrical protrusion; 11. Fan; 12. Exhaust pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 This utility model provides a technical solution: an aluminum busbar welding mold with a fume hood, including an aluminum busbar 1 to be welded, graphite plates 2 fixed around the aluminum busbar 1 to be welded, and a crucible 3. There are four graphite plates 2, which are located on the front, back, left and right sides of the aluminum busbar 1 to be welded. The graphite plates 2 on the front and back sides are fixed and close to the aluminum busbar 1 to be welded, and the graphite plates 2 on the left and right sides are provided with limit mechanisms on their outer sides.

[0021] The limiting mechanism includes a fixed seat 4 and a lead screw 5. The end of the lead screw 5 passes through the fixed seat 4 and abuts against the graphite plates 2 on the left and right sides of the aluminum busbar 1 to be welded.

[0022] The crucible 3 is located on the outside of the aluminum busbar 1 to be welded. The crucible 3 is a cylindrical can structure. The bottom surface of the internal cavity of the crucible 3 is concave. A self-fusion pad 6 is provided in the center of the concave surface. A guide pipe 7 is connected to the flow channel port at the bottom end of the self-fusion pad 6. The end of the guide pipe 7 passes through the graphite plate 2 on the front side of the aluminum busbar 1 to be welded and contacts the surface defect of the aluminum busbar 1 to be welded.

[0023] The top of the crucible 3 is provided with a baffle mechanism, which includes a fume hood 8 with a front opening structure. The fume hood 8 is a cylindrical structure with a front notch. An arc-shaped baffle 9 is slidably installed on the inner wall of the fume hood 8 through a sliding groove. A cylindrical protrusion 10 is provided on the outer surface of the arc-shaped baffle 9. A suction fan 11 is installed on the top cover of the fume hood 8. The top of the suction fan 11 is connected to an exhaust pipe 12.

[0024] A filter screen is installed on the inner top surface of the smoke hood 8 where it connects to the suction fan 11. The smoke hood 8 is fixedly fitted onto the crucible 3 by a threaded connection, and the suction fan 11 is connected to an external power source.

[0025] The guide pipe 7 is inclined from top to bottom, which makes it easy for the molten metal inside the crucible 3 to flow to the surface defects of the aluminum busbar 1 to be welded.

[0026] The arc-shaped cover 9 is located at the opening on the front of the fume hood 8. The arc-shaped cover 9 can be opened and closed as needed, which not only facilitates the addition of materials, but also prevents the flames and smoke inside the fume hood 8 from escaping from the crucible 3 and affecting the surrounding workers.

[0027] Working principle:

[0028] In this device structure, when welding aluminum busbars via a self-propagating reaction, the aluminothermic reaction in the crucible 3 causes intense heat release, generating a molten metal. Due to the high temperature, the multiple self-fluxing pads 6 stacked on top of each other on the bottom surface of the crucible 3 melt, leaking out the bottom channel. The molten metal flows along the bottom channel at the concave surface of the bottom surface of the crucible 3, passes through the guide pipe 7 and the front graphite plate 2, and then enters the defect on the surface of the aluminum busbar 1 to be welded.

[0029] During the self-propagating reaction welding of aluminum busbars, the intense aluminothermic reaction in the crucible 3 generates a large amount of smoke and flames. By manually holding the cylindrical protrusion 10 and pulling the arc-shaped cover 9, the arc-shaped cover 9 is pulled from the back side of the inside of the fume hood 8 to the front opening of the fume hood 8, forming a shielding structure. After the external power supply of the suction fan 11 is turned on, the smoke in the fume hood 8 is drawn upward and discharged through the exhaust pipe 12. During the upward discharge of the smoke in the fume hood 8, it will pass through the filter screen at the connection between the top surface of the fume hood 8 and the suction fan 11, which plays a filtering role. The entire structure of the fume hood 8 and the crucible 3 are fixed by a detachable threaded connection, which makes it convenient to remove and clean the inner wall of the fume hood 8.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding mold for aluminum busbars with a fume hood, comprising an aluminum busbar to be welded (1), a graphite plate (2) fixed around the aluminum busbar to be welded (1), and a crucible (3), characterized in that, The number of graphite plates (2) is four. The four graphite plates (2) are located on the front, back, left and right sides of the aluminum busbar (1) to be welded. The graphite plates (2) on the front and back sides are fixedly attached to the aluminum busbar (1) to be welded. The two graphite plates (2) on the left and right sides are provided with limit mechanisms on their outer sides. The limiting mechanism includes a fixed seat (4) and a lead screw (5). The end of the lead screw (5) passes through the fixed seat (4) and abuts against the graphite plates (2) on the left and right sides of the aluminum busbar (1) to be welded. The crucible (3) is located on the outside of the aluminum busbar (1) to be welded. The crucible (3) is a cylindrical can structure. The bottom surface of the internal cavity of the crucible (3) is concave. A self-fluxing pad (6) is provided in the center of the concave surface. A guide pipe (7) is connected to the flow channel port at the bottom end of the self-fluxing pad (6). The end of the guide pipe (7) passes through the graphite plate (2) on the front of the aluminum busbar (1) to be welded and contacts the surface defect of the aluminum busbar (1). The top of the crucible (3) is provided with a cover mechanism, which includes a smoke hood (8) with a front opening structure. The smoke hood (8) is a cylindrical structure with a front notch. An arc-shaped cover (9) is slidably installed on the inner wall of the smoke hood (8) through a sliding groove. A cylindrical protrusion (10) is provided on the outer surface of the arc-shaped cover (9). A suction fan (11) is installed on the top cover of the smoke hood (8). The top of the suction fan (11) is connected to an exhaust pipe (12).

2. The aluminum busbar welding mold with a fume hood according to claim 1, characterized in that: A filter screen is installed on the inner top surface of the smoke hood (8) and at the connection point between it and the suction fan (11). The smoke hood (8) is fixedly fitted onto the crucible (3) by a thread, and the suction fan (11) is connected to an external power source.

3. The aluminum busbar welding mold with a fume hood according to claim 1, characterized in that: The guide pipe (7) is inclined from top to bottom.

4. The aluminum busbar welding mold with a fume hood according to claim 1, characterized in that: The arc-shaped cover (9) is located at the opening on the front of the smoke hood (8).

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