A narrow gap welding gun

Abstract

The invention discloses a narrow gap welding gun, comprising an air intake cooling block, an air intake block and a conductive nozzle. Compared with the prior art, the invention has the following beneficial effects: the air intake block is set as a flat strip plate structure, so that the lower end of the air intake block is conveniently placed in the narrow gap; the conductive nozzle is installed in the middle of the gap and the two sides of the gap are connected with two gas flow channels, so that the combustion-supporting gas can flow out through the two sides of the gap to fill the narrow gap and wrap the conductive nozzle at the same time, thereby ensuring that the conductive nozzle fully melts the welding wire.

Description

Technical Field

[0001] The invention relates to a welding gun, in particular to a narrow gap welding gun. Background Art

[0002] The common gas shielded welding torch is large in size and cannot meet the working requirements of narrow gaps. The existing solution is to open a hole in the stainless steel plate so that the argon arc welding torch can reach the inside of the workpiece for welding at the same time. However, this method will damage the flatness and smoothness of the stainless steel plate surface and even cause the plate layer to deform, which cannot meet the use requirements and has extremely low welding efficiency. Summary of the invention

[0003] Purpose of the invention: to provide a narrow gap welding gun that can meet the needs of welding a narrow gap.

[0004] Technical solution: The narrow gap welding gun provided by the present invention includes an air intake cooling block, an air intake block and a conductive nozzle; an air intake block mounting groove is arranged on the lower side of the air intake cooling block; the air intake block is a flat strip plate; the upper end of the air intake block is installed in the air intake block mounting groove; a gas flow channel is vertically penetrated on both sides of the air intake block; two gas hole interfaces are arranged on the air intake cooling block; a gas hole is arranged on the side walls of the two gas flow channels; the two gas holes are respectively connected to the two gas hole interfaces; a notch is arranged at the lower end of the air intake block; the two side surfaces of the notch are respectively connected to the two gas flow channels; the conductive nozzle is installed in the middle of the notch.

[0005] Furthermore, a middle cooling block is sleeved in the middle of the air intake block; a mounting tube is arranged on the lower side of the middle cooling block; a protective gas storage tank is arranged on the fitting surface between the middle cooling block and the air intake block; a protective gas inlet hole connected to the protective gas storage tank is arranged on the middle cooling block; and a plurality of protective gas outlet holes connected to the protective gas storage tank are arranged upward on the lower edge of the mounting tube.

[0006] Furthermore, a protective sleeve is provided on the mounting tube, and the protective sleeve surrounds the air intake block.

[0007] Furthermore, the middle cooling block is composed of two clamping units; each clamping unit is provided with a protective gas storage tank and a protective gas inlet hole.

[0008] Furthermore, an air intake block wire feeding hole is vertically arranged on the air intake block, and the air intake block wire feeding hole is located between the two gas flow channels; the conductive nozzle is installed at the lower hole of the air intake block wire feeding hole; a cooling block wire feeding hole is provided on the upper side of the air intake cooling block; a conductive nozzle wire feeding hole is vertically arranged in the conductive nozzle; the conductive nozzle wire feeding hole, the air intake block wire feeding hole and the cooling block wire feeding hole are coaxially arranged.

[0009] Furthermore, an upper coolant hole is transversely penetrated on the air intake cooling block.

[0010] Furthermore, a lower coolant hole is transversely provided on each of the two clamping units.

[0011] Furthermore, the gap is an isosceles trapezoidal gap.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the air intake block is set as a flat strip plate structure, which makes it easy to place the lower end of the air intake block into the narrow gap; the conductive nozzle is installed in the middle of the notch and the two side surfaces of the notch are connected to the two gas flow channels, which can ensure that the combustion-supporting gas flows out from both sides of the notch to fill the narrow gap and wrap the conductive nozzle at the same time, thereby ensuring that the conductive nozzle fully melts the welding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the installation schematic diagram of the present invention;

[0014] Figure 2 A bottom view of the air intake cooling block of the present invention;

[0015] Figure 3 It is a rear view of the clamping unit of the present invention;

[0016] Figure 4 A bottom view of the air intake block of the present invention;

[0017] Figure 5 It is a schematic diagram of the system installation of the present invention. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0019] Embodiment 1:

[0020] like Figure 1-5 As shown, a narrow gap welding gun provided by the present invention includes: an air intake cooling block 1, an air intake block 2 and a conductive nozzle 5; an air intake block mounting groove 6 is arranged on the lower side of the air intake cooling block 1; the air intake block 2 is a flat strip plate; the upper end of the air intake block 2 is installed in the air intake block mounting groove 6; a gas flow channel 9 is vertically penetrated on both sides of the left and right sides of the air intake block 2; two gas hole interfaces 19 are arranged on the air intake cooling block 1; a gas hole 8 is arranged on the side walls of the two gas flow channels 9; the two gas holes 8 are respectively connected to the two gas hole interfaces 19; a notch 10 is arranged at the lower end of the air intake block 2; the two side surfaces of the notch 10 are respectively connected to the two gas flow channels 9; the conductive nozzle 5 is installed in the middle of the notch 10.

[0021] The air intake block 2 is set as a flat strip plate structure, which makes it convenient to place the lower end of the air intake block 2 into the narrow gap; the conductive nozzle 5 is installed in the middle of the notch 10 and the two side surfaces of the notch 10 are connected with the two gas flow channels 9, which can ensure that the combustion-supporting gas flows out from both sides of the notch 10 to fill the narrow gap and wrap the conductive nozzle 5, thereby ensuring that the conductive nozzle 5 fully melts the welding wire.

[0022] Furthermore, a middle cooling block 3 is sleeved in the middle of the air intake block 2; a mounting tube 13 is disposed on the lower side of the middle cooling block 3; a shielding gas storage tank 20 is disposed on the mating surface of the middle cooling block 3 and the air intake block 2; a shielding gas inlet hole 11 connected to the shielding gas storage tank 20 is disposed on the middle cooling block 3; and a plurality of shielding gas outlet holes 18 connected to the shielding gas storage tank 20 are disposed upward on the lower edge of the mounting tube 13. The shielding gas storage tank 20 and the plurality of shielding gas outlet holes 18 ensure uniform shielding gas outlet, so that the shielding gas surrounds the welding wire and isolates the welding wire from the air.

[0023] Furthermore, a protective sleeve 4 is sleeved on the mounting tube 13, and the protective sleeve 4 surrounds the air inlet block 2. The protective sleeve 4 is sleeved on the mounting tube 13 to enhance the gas sealing performance and prevent the shielding gas from floating upward; the protective sleeve 4 is used to concentrate the shielding gas discharged from the plurality of shielding gas outlet holes 18 and guide it to the periphery of the conductive nozzle 5 to prevent the shielding gas from escaping.

[0024] Furthermore, the middle cooling block 3 is composed of two clamping units 21, and each clamping unit 21 is provided with a protective gas storage tank 20 and a protective gas inlet hole 11. The two clamping units 21 facilitate the installation of the middle cooling block 3, and at the same time ensure that the protective gas is evenly discharged from the front and rear sides of the middle cooling block 3.

[0025] Furthermore, an air intake block wire feeding hole 15 is vertically arranged on the air intake block 2, and the air intake block wire feeding hole 15 is located between the two gas flow channels 9; the conductive nozzle 5 is installed at the lower opening of the air intake block wire feeding hole 15; a cooling block wire feeding hole 7 is provided on the upper side of the air intake cooling block 1; a conductive nozzle wire feeding hole 14 is vertically arranged in the conductive nozzle 5; the conductive nozzle wire feeding hole 14, the air intake block wire feeding hole 15 and the cooling block wire feeding hole 7 are coaxially arranged. The coaxial arrangement of the electric nozzle wire feeding hole 14, the air intake block wire feeding hole 15 and the cooling block wire feeding hole 7 ensures that the welding wire can be smoothly delivered to the conductive nozzle 5.

[0026] Furthermore, an upper coolant hole 16 is transversely provided through the air intake cooling block 1. The upper coolant hole 16 is used to pass coolant to cool the air intake cooling block 1 and the upper end of the air intake block 2.

[0027] Furthermore, a lower coolant hole 17 is transversely provided on each of the two clamping units 21. The two lower coolant holes 17 are used to pass coolant to cool the middle cooling block 3, cool the middle of the air intake block 2, and cool the shielding gas to help the welding wire cool after melting.

[0028] Furthermore, the notch 10 is an isosceles trapezoidal notch. The isosceles trapezoidal notch ensures that the gas output from the two waist surfaces remains uniform and can wrap the conductive nozzle 5.

[0029] In the narrow gap welding gun provided by the present invention, the air intake cooling block 1, the air intake block 2, the middle cooling block 3, the protective sleeve 4 and the conductive nozzle 5 are all made of chromium zirconium copper, which can ensure that the narrow gap welding gun has good electrical conductivity, thermal conductivity, wear resistance and anti-friction performance, and the electrode loss during welding is small, the welding speed is fast, and the total welding cost is low.

[0030] When the narrow gap welding gun provided by the present invention is installed and used, the bracket 200, the cooling water tank 400 and the welding machine 300 are first installed on the mounting seat 900, the welding machine 300 is electrically connected to the narrow gap welding gun 600, and the cooling water tank 400 provides coolant for the air intake cooling block 1 and the middle cooling block 3; then the telescopic rod 500 is installed on the bracket 200; two wire feeders 100 are installed on the telescopic rod 500, and the welding wires extended by the two wire feeders 100 enter the two narrow gap welding guns 600 respectively; two welding gun brackets 800 are installed on the telescopic rod 500 below the wire feeder 100 through a slider, which is used to adjust the distance between the two narrow gap welding guns 600; the two narrow gap welding guns 600 are respectively installed at the ends of the two welding gun brackets 800, and there is a certain height difference in the height positions of the conductive nozzles 5 of the two narrow gap welding guns 600; angle adjustment handles 700 for adjusting the inclination angle of the narrow gap welding gun 600 are installed at the ends of the two welding gun brackets 800.

[0031] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A narrow gap welding gun, characterized in that: The invention comprises an air intake cooling block (1), an air intake block (2) and a conductive nozzle (5); an air intake block mounting groove (6) is arranged on the lower side of the air intake cooling block (1); the air intake block (2) is a flat strip plate, so that the lower end of the air intake block (2) can be placed in a narrow gap; the upper end of the air intake block (2) is mounted in the air intake block mounting groove (6); a gas flow channel (9) is vertically penetrated on both the left and right sides of the air intake block (2); two gas hole interfaces (19) are arranged on the air intake cooling block (1); a gas hole (8) is arranged on the side wall of each of the two gas flow channels (9); the two gas holes (8) are respectively connected to the two gas hole interfaces (19); a notch (10) is arranged at the lower end of the air intake block (2); the two sides of the notch (10) are respectively connected to the two gas flow channels (9); the conductive nozzle (5) is mounted in the middle of the notch (10); A middle cooling block (3) is sleeved in the middle of the air intake block (2); a mounting tube (13) is arranged on the lower side of the middle cooling block (3); a protective gas storage tank (20) is arranged on the contact surface between the middle cooling block (3) and the air intake block (2); a protective gas inlet hole (11) connected to the protective gas storage tank (20) is arranged on the middle cooling block (3); and a plurality of protective gas outlet holes (18) connected to the protective gas storage tank (20) are arranged upward on the lower edge of the mounting tube (13); A protective sleeve (4) is sleeved on the mounting tube (13), and the protective sleeve (4) surrounds the air inlet block (2); the protective sleeve (4) collects the protective gas discharged from the plurality of protective gas outlet holes (18) and guides the protective gas to the periphery of the conductive nozzle (5), thereby preventing the protective gas from escaping; The middle cooling block (3) is composed of two sandwich units (21); each sandwich unit (21) is provided with a protective gas storage tank (20) and a protective gas inlet hole (11); An air intake block wire feeding hole (15) is vertically arranged on the air intake block (2), and the air intake block wire feeding hole (15) is located between two gas flow channels (9); a conductive nozzle (5) is installed at the lower opening of the air intake block wire feeding hole (15); a cooling block wire feeding hole (7) is provided on the upper side of the air intake cooling block (1); a conductive nozzle wire feeding hole (14) is vertically arranged in the conductive nozzle (5); the conductive nozzle wire feeding hole (14), the air intake block wire feeding hole (15) and the cooling block wire feeding hole (7) are coaxially arranged.

2. A narrow gap welding gun according to claim 1, characterized in that: An upper coolant hole (16) is transversely provided on the air intake cooling block (1).

3. A narrow gap welding gun according to claim 1, characterized in that: A lower coolant hole (17) is transversely provided on each of the two clamping units (21).

4. A narrow gap welding gun according to claim 1, characterized in that: The notch (10) is an isosceles trapezoidal notch.

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