A handle for a gas metal arc welding fume extraction torch

Abstract

This utility model provides a welding torch handle for gas shielded metal arc welding (GEAW), belonging to the technical field of welding torch handles. Its structure includes a gooseneck tube. In the grip section of the handle, at least two cavities are formed around the gooseneck tube: an inner fume chamber and an outer air insulation chamber. In the recessed neck section in front of the grip section, at least one cavity, the fume chamber, is formed around the gooseneck tube. The fume chamber and its outer air insulation chamber are isolated. The fume chamber is formed between the fume tube and the gooseneck tube; the air insulation chamber is formed between the handle shell and the fume tube; the fume chamber is formed between the fume tube and the gooseneck tube; and the fume chamber and the fume tube are sealed together front and rear. This utility model features a suspended, closed, independent fume tube inside the handle, completely isolating high-temperature fumes from the handle shell. The air insulation chamber forms an air insulation layer, effectively reducing the impact of high-temperature fumes on the handle's temperature rise.

Description

Technical Field

[0001] This utility model relates to the technical field of welding torch handles, specifically a welding torch handle for gas shielded welding. Background Technology

[0002] In welding equipment, the gas metal arc welding torch (GMAW) with fume extraction is a welding accessory that integrates a fume control device into the welding torch. The fumes generated during welding are captured by the fume extraction nozzle at the top of the nozzle, and then enter the fume extraction machine through the fume extraction tube at the front of the torch handle, the fume extraction pipe inside the handle, and the fume extraction hose. After being filtered by the fume extraction machine, the fumes are discharged into the environment.

[0003] However, the traditional design of the welding torch handle for gas shielded metal arc welding has some obvious problems, such as excessive temperature rise of the handle due to high-temperature fumes, malfunction of the internal circuit control system of the handle caused by fumes, and fumes accumulating inside the handle and requiring frequent cleaning. Summary of the Invention

[0004] The technical objective of this invention is to address the shortcomings of existing technologies and provide a handle for a gas shielded metal arc welding (GEA) fume extraction torch.

[0005] The technical solution of this utility model is implemented in the following way: the handle of a gas metal arc welding fume extraction torch of this utility model has the following structure: including a gooseneck tube; The grip section of the welding torch handle has at least two cavities around the gooseneck tube: an inner fume chamber and an outer air insulation chamber. The sinker section in front of the grip section of the welding torch handle has at least one cavity, namely the fume chamber, on the periphery of the gooseneck tube. The smoking chamber and the dust chamber are connected from front to back; The dust chamber and its outer air insulation chamber are isolated from each other.

[0006] The dust chamber and its outer air insulation chamber are isolated by a dust pipe; The dust chamber is formed between the dust pipe and the gooseneck pipe; An air-insulated cavity is formed between the handle housing and the smoke pipe; The gooseneck tube, the flue tube, and the handle casing are arranged sequentially from the inside out. The smoking chamber is formed between the smoking tube and the gooseneck tube; The smoking pipe and the dust pipe are sealed together front and back, forming a continuous smoking chamber and dust chamber.

[0007] The front end of the smoking tube connects with the end of the smoking mouthpiece on the outer periphery of the front end of the gooseneck tube; The end of the fume duct and the fume extraction hose at the rear end of the welding torch handle are connected by a ball joint assembly; From the mouthpiece, smoking chamber, dust chamber, to the smoking hose, a negative pressure suction dust flow channel is formed.

[0008] The flue is composed of two symmetrical halves of a tube, which are joined together to cover the gooseneck tube. The handle housing consists of two symmetrical halves, which are joined together to cover the dust pipe. The handle housing, smoke tube, and gooseneck tube are fixedly connected; The outer surface of the handle housing is the gripping surface of the welding torch handle grip section.

[0009] A positioning ring is fitted onto the gooseneck tube of the grip section, and a positioning block is fixedly installed on the gooseneck tube at the tail of the grip section. The positioning ring has two through holes distributed vertically on its surface, which connect the smoking chamber and the dust chamber. The positioning ring is used to fix the dust pipe and the front end of the handle housing; The positioning block is designed as a flat block with flat sections, and the flat sections provide a larger flow channel for the dust chamber; Pins are provided on the left and right sides of the positioning block, and the positioning block and pins are used to fix the dust pipe and the handle housing.

[0010] The direction of the smoking tube matches the curvature of the neck section at the front of the gooseneck tube. The smoking tube is composed of two symmetrical half-tubes with a two-lobed opening and closing splicing structure. The two half-tubes are spliced ​​together to cover the gooseneck section of the sinking neck. The front ends of the two halves of the smoking tube are fixedly connected to the mouthpiece, and the ends are fixedly connected to the positioning groove at the front end of the handle housing.

[0011] The inner surface of the flue pipe is designed to be smooth to prevent dust from adhering.

[0012] The beneficial effects of this utility model compared with the prior art are: This utility model discloses a welding torch handle for gas shielded welding, which features a closed, independent fume duct inside the handle. This closed, independent fume duct completely isolates the high-temperature fumes from the handle's outer shell. The closed, independent fume duct is suspended in the center of the handle, with a certain spatial gap between it and the handle's outer shell. This air insulation cavity utilizes the low thermal conductivity of air to form an air insulation layer, effectively reducing the impact of high-temperature fumes on the handle's temperature rise.

[0013] The circuit control system is housed in an air-insulated chamber between a closed, independent smoke duct and the handle housing, completely isolating the smoke from the circuit control system and preventing smoke from causing malfunctions in the handle's internal circuit control system.

[0014] The front smoke tube of the handle adopts a two-part opening and closing design structure with quick disassembly and assembly. Operators can quickly disassemble and assemble the front smoke tube of the handle without disassembling the handle to complete the cleaning of the smoke inside the handle. This saves time when disassembling and assembling the front smoke tube of the handle to clean the smoke inside the handle, and also avoids the risk of damage to the handle and the internal circuit control system caused by frequent disassembly and assembly of the handle.

[0015] The handle of the gas shielded welding torch of this utility model is reasonably designed, simple in structure, safe and reliable, easy to use and maintain, and has great value for promotion and use. Attached Figure Description

[0016] Appendix Figure 1 This is an exploded structural diagram of the present invention; Appendix Figure 2 This is a schematic diagram of the structure of the dust pipe in the open state for air blowing and washing according to this utility model. Appendix Figure 3 This is a schematic diagram of the structure of this utility model; Appendix Figure 4 This is a schematic diagram of the positioning ring of this utility model; Appendix Figure 5 This is a schematic diagram of the positioning block of this utility model; Appendix Figure 6 This is a schematic diagram of the structure of the dust pipe of this utility model in the state of air blowing and washing with one petal open. Appendix Figure 7 This is a schematic diagram of the structure of the dust pipe of this utility model in the state of being opened with one petal open and being air-washed with an air gun.

[0017] The markings in the attached diagram represent: 1. Welding torch handle, 2. Grip section, 3. Gooseneck tube, 4. Smoke and dust chamber; 5. Air insulation chamber. 6. First neck segment, 7. Second neck segment, 8. Smoking chamber 9. Smoke tube, 10. Handle housing, 11. Smoke tube, 12. Smoking mouthpiece, 13. Smoking hose; 14. Ball joint assembly; 15. Negative pressure suction dust flow channel, 16. Positioning ring; 17. Positioning block. 18. Through hole; 19. Pin; 20. Smooth inner surface. 21. Control and display module; 22. Trigger switch; 23. Air gun. 24. Positioning groove at the front end of the handle shell. Detailed Implementation

[0018] The following is a detailed description of a welding torch handle for gas shielded welding according to the present invention, with reference to the accompanying drawings.

[0019] As shown in the attached figure, the present invention relates to a welding torch handle for gas shielded metal arc welding, wherein a first sinker section is provided at the front of the grip section of the torch handle, and a second sinker section is provided at the rear of the grip section of the torch handle.

[0020] The first neck section is used to provide a downward-sloping bend for the welding torch nozzle.

[0021] The second neck section is used to provide a downward-sloping bend for the drooping of the fume hose connected behind the welding torch.

[0022] The downward curve of the welding torch nozzle, the droop of the fume hose, and the orientation of the grip section of the welding torch handle are all coplanar, providing a comfortable curved orientation for holding and handling the entire welding torch.

[0023] This utility model relates to a handle for a gas shielded metal arc welding (GS) fumigation torch, the structure of which includes a gooseneck tube. The grip section of the welding torch handle has at least two cavities around the gooseneck tube: an inner fume chamber and an outer air insulation chamber. The sinker section in front of the grip section of the welding torch handle has at least one cavity, namely the fume chamber, on the periphery of the gooseneck tube. The smoking chamber and the dust chamber are connected from front to back; The dust chamber and its outer air insulation chamber are isolated from each other.

[0024] The dust chamber and its outer air insulation chamber are isolated by a dust pipe; The dust chamber is formed between the dust pipe and the gooseneck pipe; An air-insulated cavity is formed between the handle housing and the smoke pipe; The gooseneck tube, the flue tube, and the handle casing are arranged sequentially from the inside out. The smoking chamber is formed between the smoking tube and the gooseneck tube; The smoking pipe and the dust pipe are sealed together front and back, forming a continuous smoking chamber and dust chamber.

[0025] The front end of the smoking tube connects with the end of the smoking mouthpiece on the outer periphery of the front end of the gooseneck tube; The end of the fume duct and the fume extraction hose at the rear end of the welding torch handle are connected by a ball joint assembly; From the mouthpiece, smoking chamber, dust chamber, to the smoking hose, a negative pressure suction dust flow channel is formed.

[0026] The flue is composed of two symmetrical halves of a tube, which are joined together to cover the gooseneck tube. The handle housing consists of two symmetrical halves, which are joined together to cover the dust pipe. The handle housing, smoke tube, and gooseneck tube are fixedly connected; The outer surface of the handle housing is the gripping surface of the welding torch handle grip section.

[0027] A positioning ring is fitted onto the gooseneck tube of the grip section, and a positioning block is fixedly installed on the gooseneck tube at the tail of the grip section. The positioning ring has two through holes distributed vertically on its surface, which connect the smoking chamber and the dust chamber. The positioning ring is used to fix the dust pipe and the front end of the handle housing; The positioning block is designed as a flat block with flat sections, and the flat sections provide a larger flow channel for the dust chamber; Pins are provided on the left and right sides of the positioning block, and the positioning block and pins are used to fix the dust pipe and the handle housing.

[0028] The direction of the smoking tube matches the curvature of the neck section at the front of the gooseneck tube. The smoking tube is composed of two symmetrical half-tubes with a two-lobed opening and closing splicing structure. The two half-tubes are spliced ​​together to cover the gooseneck section of the sinking neck. The front ends of the two halves of the smoking tube are fixedly connected to the mouthpiece, and the ends are fixedly connected to the positioning groove at the front end of the handle housing.

[0029] The inner surface of the flue pipe is designed to be smooth to prevent dust from adhering. Its high smoothness and low roughness minimize the adhesion of dust to the inner wall.

[0030] The present invention relates to a welding torch handle for gas shielded metal arc welding, which forms a closed, independent fume duct from the fume chamber to the dust chamber, through the ball head assembly to the fume hose.

[0031] High-temperature smoke from the fume extraction tube at the front of the handle enters the ball joint assembly and fume extraction hose directly through a closed, independent smoke extraction duct. Due to the air insulation chamber, direct heat transfer is avoided, and the high-temperature smoke does not come into contact with the handle's outer shell. This effectively ensures that the normal temperature of the handle's outer shell is not affected by the smoke, minimizing the impact of the smoke temperature on the operator's grip.

[0032] The positioning structures at both ends—positioning rings and positioning blocks—completely suspend the middle part of the enclosed independent smoke duct above the center of the handle shell. There is a certain gap between the enclosed independent smoke duct and the handle shell. The air insulation cavity utilizes the low thermal conductivity of air to form an air insulation layer, effectively reducing the impact of high-temperature smoke on the temperature rise of the handle.

[0033] The enclosed independent dust duct is connected and sealed to the front end of the handle housing via a positioning ring at the front end; the rear end of the enclosed independent dust duct is directly connected and sealed to the ball head, and the ball head and the rear end of the handle housing are both fixed and sealed.

[0034] The term "sealing" refers only to the sealing of fixed connections between shells, pipes, or other structures; it is an extension or continuation of the connection between shells, pipes, etc., and is not a blind-end seal.

[0035] In a closed, independent flue gas duct, the flue gas pipe is fixed to the gooseneck pipe by a positioning ring at the front and a positioning block at the rear. The airflow channels of the positioning ring and the positioning block are opened by the upper and lower through holes of the positioning ring and the upper and lower flat bodies of the positioning block, which minimizes the disturbance of the flue gas airflow channel. Based on the smooth design of the inner surface of the flue gas pipe, turbulence and turbulence can also be reduced, and the adhesion of extended particles to the inner wall of the flue gas pipe can be reduced, so as to maximize the laminar flow of the flue gas.

[0036] The upper and lower through holes of the positioning ring and the upper and lower flat bodies of the positioning block are open. The near-symmetrical structure meets the pipe cross-sectional area required for the flow of smoke and dust, reduces the eddies generated by the flow of smoke and dust in the pipe and the deposition of smoke and dust, and improves the conveying efficiency of smoke and dust as it passes through the positioning ring and positioning block.

[0037] Circuit control line routing: The gas-electric integrated cable at the rear end of the gooseneck tube leads the control line of the cable assembly out from the control line outlet of the enclosed independent smoke duct to the air insulation cavity between the smoke chamber duct and the handle housing. The soft insulating outer sheath of the control line is interference-fitted with the control line outlet of the enclosed independent smoke duct to achieve a seal for the control line outlet of the enclosed independent smoke duct.

[0038] The control line extends to the control switch below the welding torch handle.

[0039] The control line is also connected to a control display module, which is located at the very top of the handle housing. The electrical control wires of the control display module also reach the very top of the handle housing through an air insulation chamber, ensuring that it is separate and isolated from the smoke and dust chamber.

[0040] All electronic interfaces of the circuit control system are located in an air-insulated cavity between an independent fume duct and the handle housing. Control lines run through this cavity, and fume flows through it, effectively isolating the fume from the circuit control system. This avoids malfunctions caused by fume affecting the internal circuit control system of the handle.

[0041] Design of the smoking tube at the front of the handle: The front smoke tube of the handle features a two-piece opening and closing design with quick-release functionality. The two front smoke tube pieces are secured in positioning grooves at the front of the handle housing and connected by screws. Operators can quickly detach and detach the front smoke tube without disassembling the handle. Positive pressure air is used to blow out the two open smoke tube pieces first, then blown into the smoke tube from the positioning ring, completing the cleaning of the handle's internal smoke. This saves time compared to disassembling and detaching the front smoke tube during internal cleaning and avoids the risk of damage to the handle and its internal circuitry caused by frequent disassembly and reassembly.

Claims

1. A handle for a gas metal arc welding (GMAW) fume extraction torch, comprising a gooseneck tube, characterized in that: The grip section of the welding torch handle has at least two cavities around the gooseneck tube: an inner fume chamber and an outer air insulation chamber. The sinker section in front of the grip section of the welding torch handle has at least one cavity, namely the fume chamber, on the periphery of the gooseneck tube. The smoking chamber and the dust chamber are connected from front to back; The smoke chamber and its outer air insulation chamber are isolated from each other.

2. The handle of a gas metal arc welding (GMAW) fume extraction torch according to claim 1, characterized in that: The dust chamber and its outer air insulation chamber are isolated by a dust pipe; The dust chamber is formed between the dust pipe and the gooseneck pipe; An air-insulated cavity is formed between the handle housing and the smoke pipe; The gooseneck tube, the smoke tube, and the handle casing are arranged sequentially from the inside out. The smoking chamber is formed between the smoking tube and the gooseneck tube. The smoking pipe and the dust pipe are sealed together front and back, forming a continuous smoking chamber and dust chamber.

3. The handle of a gas metal arc welding (GMAW) fume extraction torch according to claim 2, characterized in that: The front end of the smoking tube connects with the end of the smoking mouthpiece on the outer periphery of the front end of the gooseneck tube; The end of the fume duct and the fume extraction hose at the rear end of the welding torch handle are connected by a ball joint assembly; From the mouthpiece, smoking chamber, dust chamber, to the smoking hose, a negative pressure suction dust flow channel is formed.

4. The handle of a gas metal arc welding (GMAW) fume extraction torch according to claim 3, characterized in that: The flue is composed of two symmetrical halves of a tube, which are joined together to cover the gooseneck tube. The handle housing consists of two symmetrical half-shells, which are joined together to cover the dust pipe. The handle housing, smoke tube, and gooseneck tube are fixedly connected; The outer surface of the handle housing is the gripping surface of the welding torch handle grip section.

5. The handle of a gas metal arc welding (GMAW) fume extraction torch according to claim 4, characterized in that: A positioning ring is fitted onto the gooseneck tube of the grip section, and a positioning block is fixedly installed on the gooseneck tube at the tail of the grip section. The positioning ring has two through holes distributed vertically on its surface, which connect the smoking chamber and the dust chamber. The positioning ring is used to fix the dust pipe and the front end of the handle housing; The positioning block is designed as a flat block with flat sections, and the flat sections provide a larger flow channel for the dust chamber; Pins are provided on the left and right sides of the positioning block, and the positioning block and pins are used to fix the dust pipe and the handle housing.

6. The handle of a gas metal arc welding (GMAW) fume extraction torch according to claim 5, characterized in that: The direction of the smoking tube matches the curvature of the neck section at the front of the gooseneck tube. The smoking tube is composed of two symmetrical half-tubes with a two-lobed opening and closing splicing structure. The two half-tubes are spliced ​​together to cover the gooseneck section of the sinking neck. The front ends of the two halves of the smoking tube are fixedly connected to the mouthpiece, and the ends are fixedly connected to the positioning groove at the front end of the handle housing.

7. The handle of a gas metal arc welding (GMAW) fume extraction torch according to claim 2, characterized in that: The inner surface of the flue pipe is designed to be smooth.

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