Smoke suction device for welding

Abstract

The utility model discloses a smoke suction device for welding. The smoke suction device is applied to a welding gun body. Comprising a smoke suction pipe arranged at the front end of a welding gun body, a smoke suction nozzle is arranged at the front end of the smoke suction pipe, and multiple smoke suction holes are formed in the side of the smoke suction nozzle; a mounting ring is slidably connected to the smoke suction pipe, a plurality of supporting rods are rotatably connected to the front end of the mounting ring, and a transparent film is wrapped between the outer sides of the supporting rods; an elastic rope is arranged between the front end of the supporting rod and the mounting ring; an elastic ring is placed at the front end of the mounting ring and is used for constraining the supporting rod when the supporting rod is folded; and a limiting mechanism is arranged on the rear side of the mounting ring. The transparent film is opened through the supporting rod to form a blocking cover, smoke dust is prevented from escaping due to airflow diffusion through the physical enclosure, and the smoke suction effect is enhanced.

Description

Technical Field

[0001] This utility model relates to a fumigation device for welding, belonging to the technical field of welding equipment. Background Technology

[0002] Welding fumes pose significant hazards. They primarily consist of vapor formed from the melting of the welding material and base metal under a high-temperature electric arc, which then oxidizes and condenses into solid particles. These particles can enter the alveoli through the upper respiratory tract, depositing in the lungs and leading to serious health problems such as respiratory diseases, pneumoconiosis, and even lung cancer. Furthermore, welding fumes dispersed throughout the factory environment not only severely harm the health of welding workers but also impair their vision, causing numerous adverse effects on welding operations. To address this, various fume extraction devices have been developed within the industry. For example, Chinese utility model patent CN218311336U discloses an adjustable dual-wire fume extraction welding torch, specifically including a torch head and a welding cable connected to the torch head. The torch head includes a torch shell and a curved neck located in front of the torch shell. A dual-wire conductive nozzle is located inside the curved neck, and a fume extraction jacket is fitted over the curved neck. The fume extraction jacket is detachably connected to the torch shell via a fume extraction sleeve. Interconnected fume extraction channels are formed within the fume extraction jacket, fume extraction sleeve, torch shell, and welding cable. A fume extraction nozzle, slidably connected to the fume extraction jacket, is located at the connection between the fume extraction jacket and the curved neck. The fume extraction sleeve has a suction hole circumferentially open and an adjusting sleeve for adjusting the size of the suction hole opening. This device has a certain fume adsorption capacity during welding, playing a positive role in controlling welding fumes. However, when dealing with high-concentration fume environments, due to limitations in adsorption capacity, some fumes may not be completely captured and may diffuse towards the workers, resulting in a less than ideal fume adsorption effect. Overall, the device is effective in conventional scenarios, but there is still room for optimization and improvement in special environments with heavy smoke and dust. Utility Model Content

[0003] The purpose of this invention is to provide a fumigation device for welding. This invention uses a support rod to open a transparent membrane, forming a shield that physically prevents smoke and dust from escaping due to airflow, thus enhancing the fumigation effect.

[0004] The technical solution of this utility model is as follows: A fumigation device for welding, applied to the body of a welding gun; including a fumigation tube disposed at the front end of the welding gun body, a fumigation mouthpiece at the front end of the fumigation tube, and multiple fumigation holes on the side of the fumigation mouthpiece; a mounting ring is slidably connected to the fumigation tube, and multiple support rods are rotatably connected to the front end of the mounting ring, with a transparent film wrapped between the outer sides of the support rods; an elastic rope is provided between the front end of the support rod and the mounting ring; an elastic ring is placed at the front end of the mounting ring, which is used to restrain the support rods when they are retracted; a limiting mechanism is provided at the rear side of the mounting ring.

[0005] The aforementioned welding fumigation device includes a limiting mechanism comprising a first cylinder disposed at the rear end of the mounting ring, a conical cylinder at the rear end of the first cylinder, and a plurality of claw grooves distributed on the conical cylinder; a second cylinder is sleeved on the outer side of the first cylinder and the conical cylinder, and an inclined portion is provided on the inner side of the rear end of the second cylinder, the inclined portion being low to high from the outside to the inside.

[0006] The aforementioned welding fumigation device has a first limiting ring between the first cylinder and the conical cylinder; the inner side of the second cylinder has a sliding groove, which cooperates with the first limiting ring (35).

[0007] In the aforementioned welding fumigation device, the front end of the first cylinder is provided with a first thread; the front end of the second cylinder is provided with a second thread, the second thread engaging with the first thread.

[0008] In the aforementioned welding fumigation device, the front end and rear end of the fumigation tube are respectively provided with second limiting rings, and the mounting ring slides between the two second limiting rings.

[0009] The aforementioned welding fumigation device has multiple sliding guide rails on the side of the fumigation tube; and multiple guide blocks are provided on the inner side of the mounting ring, with the guide blocks cooperating with the sliding guide rails.

[0010] In the aforementioned welding fumigation device, the upper front end of the support rod is provided with a protrusion, and the outer end of the elastic rope is connected to the protrusion; the protrusion is provided with a groove, and the elastic ring is embedded in the groove when the support rod is retracted.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. In this invention, before welding, the elastic ring is removed from the front end of the support rod and placed on the mounting ring. At this time, after releasing the elastic ring from the support rod, the elastic rope, due to the initial preload, drives the front end of the support rod to open outwards, causing the transparent film connected to the outer end of the support rod to unfold in an umbrella shape, forming a ring-shaped shield. By sliding the mounting ring along the smoke extraction tube, the distance between the shield and the welding head can be adjusted. Once in position, a limiting mechanism locks the mounting ring to ensure the shield's stability. After the operation is completed, the elastic ring is re-attached to the front ends of all the support rods. The contraction force of the elastic ring forces the support rods to converge towards the center, causing the transparent film to fold, reducing the overall structure volume to its initial state for easy storage. Thus, this invention achieves the effect of using the support rod to open the transparent film to form a shield, physically preventing smoke and dust from escaping due to airflow diffusion. It has the advantages of good smoke extraction effect, simple structure, and convenient operation.

[0013] 2. In this utility model, after the mounting ring is moved to a suitable position, the second cylinder is moved forward so that the second thread contacts the first thread and rotates to engage with it. During this process, the inclined part inside the second cylinder slides relative to the outer conical surface of the conical cylinder, forcing the conical cylinder to converge and contract radially inward until its inner surface tightly abuts against the outer wall of the smoking tube. At this time, the clamping friction force generated between the conical cylinder and the smoking tube is transmitted to the mounting ring through the structure, keeping it fixed on the smoking tube and completing the limiting and locking. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a structural diagram of the mounting ring;

[0016] Figure 3 This is a structural diagram of the limit mechanism.

[0017] The labels in the attached diagram are as follows: 1-Welding gun body, 2-Welding head, 3-Smoking pipe, 4-Smoking nozzle, 5-Smoking hole, 6-Mounting ring, 7-Support rod, 8-Transparent film, 9-Elastic rope, 10-Elastic ring, 11-Limiting mechanism, 12-Second limiting ring, 13-Sliding guide rail, 14-Guide block, 15-Protrusion, 16-Slot, 30-First cylinder, 31-Conical cylinder, 32-Claw groove, 33-Second cylinder, 34-Inclined part, 35-First limiting ring, 36-Sliding groove, 37-First thread, 38-Second thread. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0019] Example: A fume extraction device for welding, configured as follows Figure 1-3As shown, the welding gun body 1 is applied to the welding gun body 1, and the welding gun body 1 has a welding head 2 at its front end; it includes a fumigation tube 3 made of 304 stainless steel, which is set at the front end of the welding gun body 1. The fumigation tube 3 has high temperature resistance and corrosion resistance. The front end of the fumigation tube 3 has a fumigation mouthpiece 4, and the side of the fumigation mouthpiece 4 has multiple fumigation holes 5. The welding gun body 1 is connected to a negative pressure pipe, which is connected to the inside of the fumigation tube 3. The fumes generated during the welding process are drawn into the fumigation tube 3 through the fumigation holes 5 and discharged outward from the negative pressure pipe; an installation ring 6 is slidably connected to the fumigation tube 3. The front end of the installation ring 6 is rotatably connected to eight glass fiber reinforced nylon support rods 7 through a stainless steel pin. The support rods 7 have lightweight, high strength and bending resistance. A transparent film 8 is wrapped around the support rod 7. To prevent the transparent film 8 from being burned through by sparks during welding, it is made of polycarbonate (PC), which has the characteristics of high temperature resistance (short-term resistance to 120℃), light transmittance (85%), and flexibility and foldability. It can resist welding sparks and can be flexibly opened and closed with the support rod 7. Alternatively, a silicone rubber-coated fiberglass film can be used. The fiberglass substrate provides high-strength support, and the silicone rubber coating provides elasticity. It has a long-term temperature resistance of 200℃ and an instantaneous temperature resistance of up to 300℃, which can resist the instantaneous impact of welding sparks. An elastic rope 9 is provided between the front end of the support rod 7 and the mounting ring 6. An elastic ring 10 is placed at the front end of the mounting ring 6. The elastic ring 10 is used to restrain the support rod 7 when it is retracted. A limiting mechanism 11 is provided at the rear of the mounting ring 6. Before welding, the elastic ring 10 is removed from the front end of the support rod 7 and placed on the mounting ring 6. At this point, after releasing the elastic ring 10 from the support rod 7, the elastic rope 9, due to the initial preload, drives the front end of the support rod 7 to open outward, causing the transparent film 8 connected to the outer end of the support rod 7 to unfold in an umbrella shape, forming an annular shield. By sliding the mounting ring 6 along the smoking pipe 3, the distance between the shield and the welding head 2 can be adjusted. Once in position, the positioning ring 6 is locked in place by the limiting mechanism 11 to ensure the stability of the shield. After the operation is completed, the elastic ring 10 is re-attached to the front ends of all the support rods 7. The contraction force of the elastic ring 10 forces the support rods 7 to converge towards the center, and the transparent film 8 folds accordingly, reducing the overall structure volume to its initial state for easy storage.

[0020] Preferably, such as Figure 3As shown, the limiting mechanism 11 includes a first cylindrical body 30 disposed at the rear end of the mounting ring 6, a conical cylindrical body 31 disposed at the rear end of the first cylindrical body 30, and a plurality of claw grooves 32 distributed on the conical cylindrical body 31; a second cylindrical body 33 is sleeved on the outer side of the first cylindrical body 30 and the conical cylindrical body 31, and an inclined portion 34 is disposed on the inner side of the rear end of the second cylindrical body 33, the inclined portion 34 being lower from the outside to the inside. A first limiting ring 35 is disposed between the first cylindrical body 30 and the conical cylindrical body 31; a sliding groove 36 is disposed on the inner side of the second cylindrical body 33, the first limiting ring 35 sliding within the sliding groove 36, limiting the movement range of the second cylindrical body 33, and preventing the second cylindrical body 33 from sliding too far when not connected to the first cylindrical body 30. The first cylindrical body 30 has a first thread 37 at its front end; the second cylindrical body 33 has a second thread 38 at its front end. After the second thread 38 and the first thread 37 are screwed together to move the mounting ring 6 to a suitable position, the second cylindrical body 33 is moved forward so that the second thread 38 contacts the first thread 37 and rotates to screw them together. During this process, the inclined portion 34 inside the second cylindrical body 33 slides relative to the outer conical surface of the conical cylindrical body 31, forcing the conical cylindrical body 31 to converge and contract radially inward until its inner surface tightly abuts against the outer wall of the smoking tube 3. At this time, the clamping friction force generated between the conical cylindrical body 31 and the smoking tube 3 is transmitted to the mounting ring 6 through the structure, keeping it fixed on the smoking tube 3 and completing the limiting and locking.

[0021] Preferably, such as Figure 1 As shown, the front and rear ends of the smoking tube 3 are respectively provided with second limiting rings 12, and the mounting ring 6 slides between the two second limiting rings 12, limiting the range of movement of the mounting ring 6. When the support rod 7 is folded up and placed between the two second limiting rings 12, the second limiting ring 12 at the front end can protect the end of the support rod 7 from damage due to collision.

[0022] Preferably, such as Figure 1 and Figure 2 As shown, the side of the smoking tube 3 is provided with multiple sliding guide rails 13; the inner side of the mounting ring 6 is provided with multiple guide blocks 14. The guide blocks 14 cooperate with the sliding guide rails 13 so that the mounting ring 6 can only move along the axial direction of the smoking tube 3 and will not rotate.

[0023] Preferably, such as Figure 2 and Figure 3 As shown, the upper front end of the support rod 7 is provided with a protrusion 15, and the outer end of the elastic rope 9 is connected to the protrusion 15; the protrusion 15 is provided with a groove 16, and when the support rod 7 is retracted, the elastic ring 10 is embedded in the groove 16, making it difficult for the elastic ring 10 to separate from the support rod 7, and preventing the support rod 7 from opening due to the elastic block falling off on its own during storage.

[0024] Working principle:

[0025] Before welding, the elastic ring 10 at the front end of the support rod 7 is removed. The elastic rope 9, due to the rebound force of the pre-tightening force, drives the front end of the support rod 7 to open outward, causing the transparent membrane 8 at the outer end of the support rod 7 to unfold in an umbrella shape to form a ring-shaped shield. The distance between the shield and the welding head 2 is adjusted by sliding the mounting ring 6 along the smoke pipe 3. After it is in place, the second cylinder 33 is rotated so that its thread engages with the thread of the first cylinder 30. The inclined part 34 inside the second cylinder 33 forces the conical cylinder 31 to converge and contract radially inward and abut against the outside of the smoke pipe 3. The resulting clamping friction force fixes the mounting ring 6. During welding, the negative pressure pipe generates negative pressure. Welding fumes are drawn into the smoke pipe 3 through the smoke hole 5 on the smoke nozzle 4 and discharged outward. The transparent membrane 8, through physical enclosure, gathers the fumes near the smoke hole 5, forming a local negative pressure flow field with the negative pressure pipe. This actively guides the fumes generated during welding to the smoke hole 5, allowing the fumes to be preferentially drawn into the smoke pipe 3 through the smoke hole 5, preventing the fumes from escaping due to airflow diffusion. After the work is completed, the elastic ring 10 is put back into the front end of the support rod 7, forcing the support rod 7 to converge towards the center, and the transparent film 8 is folded for easy storage.

Claims

1. A welding smoke suction device applied to a welding gun body (1); comprising a smoke suction pipe (3) arranged at the front end of the welding gun body (1), a smoke suction nozzle (4) arranged at the front end of the smoke suction pipe (3), and a plurality of smoke suction holes (5) arranged at the side of the smoke suction nozzle (4); characterized in that: A mounting ring (6) is slidably connected to the smoking tube (3). Multiple support rods (7) are rotatably connected to the front end of the mounting ring (6). A transparent film (8) is wrapped between the outer sides of the support rods (7). An elastic rope (9) is provided between the front end of the support rod (7) and the mounting ring (6). An elastic ring (10) is placed at the front end of the mounting ring (6). The elastic ring (10) is used to restrain the support rods (7) when they are retracted. A limiting mechanism (11) is provided on the rear side of the mounting ring (6).

2. The smoking apparatus for welding according to claim 1, characterized in that: The limiting mechanism (11) includes a first cylinder (30) disposed at the rear end of the mounting ring (6), a conical cylinder (31) disposed at the rear end of the first cylinder (30), and a plurality of claw grooves (32) distributed on the conical cylinder (31); a second cylinder (33) is sleeved on the outer side of the first cylinder (30) and the conical cylinder (31), and an inclined part (34) is disposed on the inner side of the rear end of the second cylinder (33), the inclined part (34) being from low to high from the outside to the inside.

3. The fume extraction device for welding according to claim 2, characterized in that: A first limiting ring (35) is provided between the first cylindrical body (30) and the conical cylindrical body (31); a sliding groove (36) is provided on the inner side of the second cylindrical body (33), and the sliding groove (36) cooperates with the first limiting ring (35).

4. The smoking apparatus for welding of claim 2, wherein: The first cylindrical body (30) has a first thread (37) at its front end; the second cylindrical body (33) has a second thread (38) at its front end, and the second thread (38) and the first thread (37) are screwed together.

5. The welding smoking device of claim 1, wherein: The front end and rear end of the smoking tube (3) are respectively provided with second limiting rings (12), and the mounting ring (6) slides between the two second limiting rings (12).

6. The welding smoking device of claim 1, wherein: The smoking tube (3) is provided with multiple sliding guide rails (13) on its side; the mounting ring (6) is provided with multiple guide blocks (14) on its inner side, and the guide blocks (14) cooperate with the sliding guide rails (13).

7. The welding smoking device of claim 1, wherein: The upper front end of the support rod (7) is provided with a protrusion (15), and the outer end of the elastic rope (9) is connected to the protrusion (15); the protrusion (15) is provided with a groove (16), and the elastic ring (10) is embedded in the groove (16) when the support rod (7) is retracted.

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