CN217965450U

CN217965450U - Multi freedom's welding set

Info

Publication number: CN217965450U
Application number: CN202221632205.8U
Authority: CN
Inventors: 阳克运; 徐基贵
Original assignee: Hubei Zhixing Steel Structure Co ltd
Current assignee: Hubei Zhixing Steel Structure Co ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2022-12-06
Anticipated expiration: 2032-06-27

Abstract

The utility model relates to a welding field discloses a multi freedom's welding set, including the welding set body, the top fixed mounting of welding set body has the purifying box, dust filtering chamber and harmful gas treatment chamber have been seted up in the purifying box, there are filter screen and active carbon filter plate in the dust filtering chamber through screw fixed mounting, the active carbon filter plate is located the right side of filter screen, dust filtering chamber rotates the reciprocal lead screw of installing vertical setting, reciprocal lead screw is located the left side of filter screen, threaded sleeve is equipped with the seat that goes up and down on the reciprocal lead screw. The utility model has the advantages of it is following and effect: in the process of carrying out multi-degree-of-freedom welding operation on a workpiece, the generated welding smoke can be effectively filtered and purified, the welding smoke is thoroughly purified, the air quality of the working environment can be effectively improved, the pollution condition of the working environment is reduced, and the harm to a human body is reduced.

Description

Multi freedom's welding set

Technical Field

The utility model relates to the field of welding technology, in particular to multi freedom's welding set.

Background

Welding is a manufacturing process and technique for joining metals or other thermoplastic materials, such as plastics, in a heated, high temperature or high pressure manner. The welding device is needed in the process of welding the workpiece, and during welding operation, because different angles need to be welded according to different welding conditions, the welding device with multiple degrees of freedom is more and more commonly used during welding operation

In the prior art, chinese patent with publication number CN212191832U discloses a welding device for multi-degree-of-freedom processing, and a top welding assembly of a base, where the welding assembly includes a portal frame a and a portal frame B, the tops of the portal frame a and the portal frame B are both provided with an electric guide rail, which are respectively an electric guide rail a and an electric guide rail B, an electric guide rail C is provided between the movable ends of the electric guide rail a and the electric guide rail B, the movable end of the electric guide rail C faces the base, and the movable end of the electric guide rail C is fixedly connected to a welding gun through an electric push rod, the bottom of the base is provided with a rotating motor, an output shaft of the rotating motor passes through the base, and an output shaft of the rotating motor is fixedly connected to a turntable, both sides of the turntable are provided with fixing plates, the fixing plates are provided with a telescopic rod, the end portions of the telescopic rods are fixedly connected to pressing plates, and a central control system is provided on the base. However, in the actual use process, the welding device with multiple degrees of freedom processing can realize the welding operation with multiple degrees of freedom on the workpiece, but does not have the function of purifying the smoke generated in the welding process, and because the amount of the smoke generated in the welding process is large, the welding smoke contains not only smoke particle impurities, but also harmful gases such as carbon dioxide, nitrogen dioxide, sulfur dioxide and the like, the welding smoke is diffused in the working environment, the working environment is polluted, the air quality is poor, the welding smoke is sucked into the body by workers to cause harm to the body, and the use requirements can not be well met.

Therefore, it is necessary to design a welding device with multiple degrees of freedom capable of performing effective filtration and purification treatment on welding fume.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a multi freedom's welding set has and carries out effectual filtration purification to the welding flue gas and handles, and is thorough to welding gas cleaning, can effectually improve operational environment's air quality, reduces operational environment's the pollution condition, reduces the effect of the injury that causes the human body.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a multi freedom's welding set, includes the welding set body, the top fixed mounting of welding set body has the purifying box, it strains dirt chamber and harmful gas treatment chamber to have seted up in the purifying box, it has filter screen and active carbon filter plate to strain the dirt intracavity through screw fixed mounting, the active carbon filter plate is located the right side of filter screen, strain the dirt chamber and rotate the reciprocal lead screw of installing vertical setting, reciprocal lead screw is located the left side of filter screen, the threaded sleeve is equipped with the lift seat on the reciprocal lead screw, fixed mounting has the scraper blade on the right side wall of lift seat, the right side of scraper blade with filter screen sliding contact, there is the motor at the top of purifying box through support fixed mounting, the top of reciprocal lead screw extend to outside the purifying box and with the output shaft fixed connection of motor, the top fixed mounting of purifying box has U type gas-supply pipe, U type both ends extend to respectively strain the dirt intracavity with harmful gas treatment intracavity, be provided with stirring subassembly and the subassembly of breathing in on the purifying box.

Through adopting above-mentioned technical scheme, the cooperation of filter screen and active carbon filter plate is used, can be used to carry out filtration purification to the smoke and dust particle impurity in the flue gas that produces when welding, the harmful gas treatment chamber is used for saving the alkaline treatment solution that purifies welding flue gas and uses, utilize the scraper blade, can scrape the adhesion at the smoke and dust particle impurity on filter screen surface, utilize the stirring subassembly, can stir the alkaline treatment solution of harmful gas treatment intracavity, increase the range of motion of alkaline treatment solution, make the welding flue gas that gets into in the harmful gas treatment chamber can fully contact with alkaline treatment solution, and then improve the purifying effect to harmful gas in the welding flue gas, utilize the subassembly of breathing in, can carry the flue gas that produces when welding to the filter dust intracavity, so that carry out subsequent purification treatment to the welding flue gas.

The utility model discloses a further set up to: the dust filtering device is characterized in that a vertical guide rod positioned on the left side of the reciprocating screw rod is fixedly installed in the dust filtering cavity, the lifting seat is sleeved on the vertical guide rod in a sliding mode, two limiting stop rods are fixedly installed on the vertical guide rod, and the lifting seat is positioned between the two limiting stop rods.

Through adopting above-mentioned technical scheme, utilize perpendicular guide arm, can lead to the direction of motion of lift seat for the motion of vertical direction can be carried out to the lift seat, utilizes two spacing pin, can carry out spacingly to the lift stroke of lift seat.

The utility model discloses a further set up to: the stirring subassembly includes vertical axis, a plurality of puddler, two sprockets and chain, the mounting hole has been seted up on the top inner wall in harmful gas treatment chamber, the vertical axis passes through sealed bearing and rotates to be installed in the mounting hole, the both ends of vertical axis all extend to outside the mounting hole, it is a plurality of the equal fixed mounting of puddler is in arrange at equidistant on the vertical axis and be a plurality of the puddler all is located in the harmful gas treatment chamber, two the sprocket is fixed the cover respectively and is established the top of vertical axis with reciprocating screw's top, the chain is around establishing two chain takes turns to.

Through adopting above-mentioned technical scheme, utilize the transmission of two sprockets and chain, steerable a plurality of puddlers rotate, and then can stir the alkaline treatment solution in the harmful gas treatment chamber.

The utility model discloses a further set up to: the top fixed mounting of purifying box has the bottom to be the cage of opening structure, motor, two sprocket and chain are in the cage.

Through adopting above-mentioned technical scheme, the cage is used for keeping apart the protection to motor, two sprockets and chain.

The utility model discloses a further set up to: the air suction assembly comprises a dust suction fan, an air suction pipe and an exhaust pipe, the dust suction fan is fixedly installed on the outer wall of the left side of the purification box, one end of the air suction pipe is fixedly connected with the suction end of the dust suction fan, one end, far away from the dust suction fan, of the air suction pipe is located below the purification box, one end of the exhaust pipe is fixedly connected with the discharge end of the dust suction fan, and one end, far away from the dust suction fan, of the exhaust pipe extends into the dust filtering cavity.

By adopting the technical scheme, the smoke generated in the welding process can be conveyed into the dust filtering cavity by utilizing the suction force generated by the operation of the dust suction fan.

The utility model discloses a further set up to: the device comprises a purification box, a harmful gas treatment cavity, a liquid feeding hole, a plug, a residue discharging pipe, an end cover and a harmful gas treatment cavity, wherein the inner wall of the top of the harmful gas treatment cavity is provided with the liquid feeding hole, the plug is installed in the inner thread of the liquid feeding hole, the residue discharging pipe is fixedly installed on the outer wall of the right side of the purification box, the right end thread of the residue discharging pipe is provided with the end cover, and the residue discharging pipe is communicated with the harmful gas treatment cavity.

By adopting the technical scheme, the liquid adding hole and the plug are utilized, the alkaline treatment solution is conveniently added into the harmful gas treatment cavity, and the residual discharge pipe and the end cover are utilized to discharge the alkaline treatment solution in the harmful gas treatment cavity, so that the alkaline treatment solution is conveniently replaced.

The utility model discloses a further set up to: the utility model discloses a dust filter, including strain dirt chamber, fixed mounting has the inspection glass, strain the dirt chamber, seted up the clearance mouth on the front side inner wall of dirt chamber, there is the clearance door through screw fixed mounting on the front side outer wall of purifying box, the clearance door with clearance mouth looks adaptation, the observation hole has been seted up in and on the front side of harmful gas treatment chamber, fixed mounting has the sight glass in the observation hole, the venthole has been seted up on the top inner wall of harmful gas treatment chamber, fixed mounting has the condensate plate that is located the venthole below on the top inner wall of harmful gas treatment chamber.

Through adopting above-mentioned technical scheme, set up clearance mouth and clearance door, be convenient for clean the filter dust intracavity portion, also be convenient for dismantle the change to filter screen and active carbon filter plate, utilize observation hole and sight glass, be convenient for observe the liquid level of the alkaline treatment solution of harmful gas processing intracavity, set up the venthole, be convenient for discharge the flue gas that purifies clean, utilize the condensate plate, can block the interception to the alkaline treatment solution that carries in the flue gas, can discharge from the venthole along with the flue gas that purifies by effectual reduction alkaline treatment solution.

The utility model has the advantages that:

1. the utility model discloses an in-process that uses the welding set body to carry out multi freedom's welding process to the work piece, start dust absorption fan, can carry the welding flue gas that produces to the filter dust intracavity, but utilize the smoke and dust granule impurity of filter screen and active carbon filter plate in to the welding flue gas, tiny particle peculiar smell etc. carry out effectual absorption purification treatment, but utilize alkaline treatment solution to carry out neutralization reaction to harmful gas such as carbon dioxide in the welding flue gas, nitrogen dioxide, sulfur dioxide, can carry out purification treatment once more to harmful gas in the welding flue gas, the purification to the welding flue gas is thorough, the flue gas that purifies sees through the condensate plate and discharges from the venthole.

2. The utility model discloses an in-process to welding gas cleaning, the starter motor, utilize the meshing transmission of two sprockets and chain, steerable reciprocating screw and vertical axis rotate simultaneously, and then steerable scraper blade up-and-down motion, can scrape the adhesion at the smoke and dust particle impurity on filter screen surface, avoid smoke and dust particle impurity adhesion more and block up its filtration pore on the filter screen, can improve the filtration purifying effect to the welding gas, utilize the vertical axis to drive a plurality of puddlers and rotate, the motion range of multiplicable alkaline treatment solution, make the welding gas that gets into in the harmful gas treatment chamber can fully contact with alkaline treatment solution, improve the neutralization reaction effect of harmful gas and alkaline treatment solution in the welding gas, further improved the effect to welding gas cleaning, and then can effectual improvement operational environment's air quality, reduce operational environment's pollution circumstances, reduce the injury that causes the human body.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic perspective view of the present embodiment.

Fig. 2 is a front sectional structural view of the purification tank.

Fig. 3 is an enlarged structural view of a portion a in fig. 2.

In the figure, 1, a device body is welded; 2. a purification box; 3. a dust filtering cavity; 4. a harmful gas processing chamber; 5. filtering with a screen; 6. an active carbon filter plate; 7. a reciprocating screw; 8. a lifting seat; 9. a squeegee; 10. a motor; 11. a vertical guide rod; 12. a U-shaped gas transmission pipe; 13. a vertical axis; 14. a stirring rod; 15. a sprocket; 16. a chain; 17. an isolation cover; 18. a dust collection fan; 19. an air intake duct; 20. an exhaust pipe; 21. a liquid feeding hole; 22. a plug; 23. a residue discharge pipe; 24. an end cap; 25. cleaning the door; 26. an observation mirror; 27. an air outlet; 28. a water condensation plate.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to limit the invention to the precise embodiments disclosed. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, 2 and 3, the present invention provides a multi-degree-of-freedom welding device, including: the welding device comprises a welding device body 1, a cleaning box 2 is fixedly installed at the top of the welding device body 1, a dust filtering cavity 3 and a harmful gas treatment cavity 4 are formed in the cleaning box 2, a filter screen 5 and an active carbon filter board 6 are fixedly installed in the dust filtering cavity 3 through screws, the active carbon filter board 6 is located on the right side of the filter screen 5, a reciprocating lead screw 7 which is vertically arranged is rotatably installed in the dust filtering cavity 3, the reciprocating lead screw 7 is located on the left side of the filter screen 5, a lifting seat 8 is sleeved on the reciprocating lead screw 7 through threads, a scraper 9 is fixedly installed on the right side wall of the lifting seat 8, the right side of the scraper 9 is in sliding contact with the filter screen 5, a motor 10 is fixedly installed at the top of the cleaning box 2 through a support, the top end of the reciprocating lead screw 7 extends out of the cleaning box 2 and is fixedly connected with an output shaft end of the motor 10, a U-shaped gas pipe 12 is fixedly installed at the top of the cleaning box 2, two ends of the U-shaped gas pipe 12 respectively extend into the dust filtering cavity 3 and the harmful gas treatment cavity 4, a vertical shaft 13, a plurality of stirring rods 14, two chain wheels 15, a chain 16, a dust collection fan 18, an air suction pipe 19 and an exhaust pipe 20 are arranged on the purification box 2, a mounting hole is formed on the inner wall of the top of the harmful gas treatment cavity 4, the vertical shaft 13 is rotatably mounted in the mounting hole through a sealed bearing, two ends of the vertical shaft 13 extend out of the mounting hole, the stirring rods 14 are fixedly mounted on the vertical shaft 13 and are arranged at equal intervals, the stirring rods 14 are positioned in the harmful gas treatment cavity 4, the two chain wheels 15 are respectively fixedly sleeved at the top end of the vertical shaft 13 and the top end of the reciprocating lead screw 7, the chain 16 is wound on the two chain wheels 15, the dust collection fan 18 is fixedly mounted on the outer wall of the left side of the purification box 2, one end of the air suction pipe 19 is fixedly connected with the suction end of the dust collection fan 18, and one end of the air suction pipe 19 far away from the dust collection fan 18 is positioned below the purification box 2, one end of the exhaust pipe 20 is fixedly connected with the discharge end of the dust collection fan 18, and one end of the exhaust pipe 20 far away from the dust collection fan 18 extends into the dust filtering cavity 3.

In this embodiment, the length of the U-shaped gas pipe 12 at one end in the harmful gas treatment chamber 4 is greater than the length of the U-shaped gas pipe 12 at one end in the dust filtration chamber 3, and the U-shaped gas pipe 12 at the end in the harmful gas treatment chamber 4 is immersed in the alkaline treatment solution.

In this embodiment, a vertical guide rod located on the left side of the reciprocating screw 7 is fixedly installed in the dust filtering cavity 3, the lifting seat 8 is slidably sleeved on the vertical guide rod 11, two limiting stop rods are fixedly installed on the vertical guide rod 11, and the lifting seat 8 is located between the two limiting stop rods.

In this embodiment, a shielding case 17 with an open bottom is fixedly installed at the top of the purifying box 2, and the motor 10, the two chain wheels 15 and the chain 16 are all arranged in the shielding case 17.

In this embodiment, a liquid feeding hole 21 is formed in the inner wall of the top of the harmful gas treatment chamber 4, a plug 22 is installed in the liquid feeding hole 21 through threads, a residue discharge pipe 23 is fixedly installed on the outer wall of the right side of the purification box 2, an end cover 24 is installed at the right end of the residue discharge pipe 23 through threads, and the residue discharge pipe 23 is communicated with the harmful gas treatment chamber 4.

In this embodiment, the clearance mouth has been seted up on the front side inner wall in dirt straining chamber 3, there is clearance door 25 through screw fixed mounting on the front side outer wall of purifying box 2, clearance door 25 and clearance mouth looks adaptation, the observation hole has been seted up in and on the front side of harmful gas treatment chamber 4, fixed mounting has viewing mirror 26 in the observation hole, venthole 27 has been seted up on the top inner wall of harmful gas treatment chamber 4, fixed mounting has the condensate plate 28 that is located venthole 27 below on the top inner wall of harmful gas treatment chamber 4.

In this embodiment, the welding device body 1 is a multi-degree-of-freedom welding device formed by combining parts such as a base, a rotating motor, a moving base, a portal frame a, a portal frame B, an electric guide rail a, an electric guide rail B, an electric guide rail C, a welding gun, a turntable, a fixed plate, a telescopic rod, a pressing plate, a central control system, a moving wheel, an electric cylinder, a lifting switch, a fixed rod, a moving rod, a spring, and the like, and the assembly relationship and the use principle of the multi-degree-of-freedom welding device are disclosed and described in a multi-degree-of-freedom welding device with an authority publication No. CN212191832U, and are not described herein again.

In this embodiment, the purifying box 2 is fixedly installed at a suitable position on the top of the electric guide rail C, the welding device body 1 is provided with the control switch, the motor 10, the dust collection fan 18 and the control switch are electrically connected with an external power line through a wire in sequence to form a loop, and the control switch can respectively control the opening and closing of the motor 10 and the dust collection fan 18.

The working principle is as follows: before welding a workpiece, pouring a proper amount of alkaline treatment solution for purifying welding smoke from a liquid adding hole 21 into a harmful gas treatment cavity 4 by screwing out a plug 22, then screwing the plug 22 back into the liquid adding hole 21 to immerse one end of a U-shaped gas transmission pipe 12 in the harmful gas treatment cavity 4 in the alkaline treatment solution, switching on a power supply, clamping and fixing the workpiece on a welding device body to weld the workpiece with multiple degrees of freedom, generating a large amount of welding smoke in the welding process of the workpiece, starting a dust suction fan 18, utilizing suction force generated by the operation of the dust suction fan 18 to enable the welding smoke to sequentially pass through an air suction pipe 19, the dust suction fan 18 and an exhaust pipe 20 to enter a dust filtering cavity 3, utilizing a filter screen 5 to intercept and filter smoke particle impurities in the welding smoke, and enabling the smoke particle impurities to be left in the filter screen 5, the active carbon filter plate 6 can be used for adsorbing and purifying the peculiar smell of fine particles in the welding smoke, and further can be used for effectively filtering dust and purifying the smoke dust particle impurities in the welding smoke, the welding smoke after being filtered and purified flows into the alkaline treatment solution in the harmful gas treatment cavity 4 through the U-shaped gas pipe 12, the alkaline treatment solution can be used for neutralizing the harmful gases such as carbon dioxide, nitrogen dioxide and sulfur dioxide in the welding smoke, and then the harmful gases in the welding smoke can be purified again, so that the purified smoke can permeate the water condensation plate 28 and be discharged from the air outlet 27, the water condensation plate 28 can be used for blocking and intercepting the alkaline treatment solution carried in the smoke, the alkaline treatment solution can be effectively reduced to be discharged from the air outlet 27 along with the purified smoke, and in the process of purifying the welding smoke, work through starter motor 10, utilize the meshing transmission of two sprocket 15 and chain 16, steerable reciprocating screw 7 and vertical axis 13 rotate simultaneously, utilize reciprocating screw 7 and the cooperation of the threaded connection of seat 8, steerable seat 8 drives scraper blade 9 up-and-down reciprocating motion, and then utilize the up-and-down reciprocating motion of scraper blade 9 can scrape the smoke and dust granule impurity of adhesion at the filter screen 5 surface, avoid smoke and dust granule impurity adhesion more and more on filter screen 5 and block up its filtration pore, can improve the filtration purification effect to the welding flue gas, utilize vertical axis 13 to drive a plurality of puddlers 14 and rotate, can stir the alkaline treatment solution in harmful gas treatment chamber 4, increase the motion range of alkaline treatment solution, make the welding flue gas that gets into in harmful gas treatment chamber 4 can fully contact with alkaline treatment solution, improve the neutralization reaction effect of harmful gas and alkaline treatment solution in the welding flue gas, the effect to welding flue gas purification has further been improved, and then can effectual improvement operational environment's air quality, reduce the pollution condition of operational environment, reduce the injury that the human body caused, to the work piece welding completion back, stop motor 10 and dust absorption operation 18 can.

The welding device with multiple degrees of freedom provided by the utility model is introduced in detail. The principles and embodiments of the present invention have been explained herein using specific embodiments, which are merely used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The multi-freedom-degree welding device is characterized by comprising a welding device body (1), a purification box (2) is fixedly mounted at the top of the welding device body (1), a dust filtering cavity (3) and a harmful gas treatment cavity (4) are formed in the purification box (2), a filter screen (5) and an active carbon filter plate (6) are mounted in the dust filtering cavity (3) through screw fixing, the active carbon filter plate (6) is located on the right side of the filter screen (5), a reciprocating lead screw (7) which is vertically arranged is rotatably mounted in the dust filtering cavity (3), the reciprocating lead screw (7) is located on the left side of the filter screen (5), a lifting seat (8) is sleeved on the reciprocating lead screw (7) through a thread, a scraper (9) is fixedly mounted on the right side wall of the lifting seat (8), the right side of the scraper (9) is in sliding contact with the filter screen (5), a motor (10) is fixedly mounted at the top of the purification box (2) through a support, the top of the reciprocating lead screw (7) extends to the outside of the purification box (2) and is connected with an output shaft of the motor (10), and a U-shaped gas pipe (12) and a gas conveying pipe (12) is fixedly mounted at the top of the purification box and extends to the inside of the harmful gas treatment cavity (4), and the purification box (2) is provided with a stirring assembly and an air suction assembly.

2. The welding device of claim 1, wherein: the dust filtering device is characterized in that a vertical guide rod which is located on the left side of a reciprocating lead screw (7) is fixedly mounted in the dust filtering cavity (3), a lifting seat (8) is sleeved on the vertical guide rod (11) in a sliding mode, two limiting stop rods are fixedly mounted on the vertical guide rod (11), and the lifting seat (8) is located between the two limiting stop rods.

3. The welding device of claim 1, wherein: the stirring assembly comprises a vertical shaft (13), a plurality of stirring rods (14), two chain wheels (15) and a chain (16), a mounting hole is formed in the inner wall of the top of the harmful gas treatment cavity (4), the vertical shaft (13) is rotatably installed in the mounting hole through a sealing bearing, the two ends of the vertical shaft (13) extend to the outside of the mounting hole, the stirring rods (14) are fixedly installed on the vertical shaft (13) at equal intervals and are arranged in the harmful gas treatment cavity (4), the chain wheels (15) are fixedly installed on the top end of the vertical shaft (13) and the top end of the reciprocating screw rod (7), and the chain (16) is arranged on the chain wheels (15) in a winding mode.

4. The multi-degree-of-freedom welding device of claim 3, wherein: the top fixed mounting of purifying box (2) has bottom for cage (17) of opening structure, motor (10), two sprocket (15) and chain (16) are in cage (17).

5. The welding device of claim 1, wherein: the air suction assembly comprises a dust suction fan (18), an air suction pipe (19) and an exhaust pipe (20), the dust suction fan (18) is fixedly installed on the outer wall of the left side of the purifying box (2), one end of the air suction pipe (19) is fixedly connected with the suction end of the dust suction fan (18), one end, far away from the dust suction fan (18), of the air suction pipe (19) is located below the purifying box (2), one end of the exhaust pipe (20) is fixedly connected with the discharge end of the dust suction fan (18), and one end, far away from the dust suction fan (18), of the exhaust pipe (20) extends into the dust filtering cavity (3).

6. The welding device of claim 1, wherein the welding device is further configured to: liquid feeding hole (21) have been seted up on the top inner wall of harmful gas treatment chamber (4), end cap (22) are installed to liquid feeding hole (21) internal thread, fixed mounting has on the right side outer wall of purifying box (2) puts incomplete pipe (23), put the right-hand member screw thread of incomplete pipe (23) and install end cover (24), put incomplete pipe (23) with harmful gas treatment chamber (4) are linked together.

7. The welding device of claim 1, wherein: the utility model discloses a dust filter, including strain dirt chamber (3), the front side inner wall of dirt chamber (3) has been seted up the clearance mouth, there is cleaning door (25) through screw fixed mounting on the front side outer wall of purifying box (2), cleaning door (25) with clearance mouth looks adaptation, the observation hole has been seted up in and on the front side of harmful gas treatment chamber (4), fixed mounting has observation mirror (26) in the observation hole, venthole (27) have been seted up on the top inner wall of harmful gas treatment chamber (4), fixed mounting has water condensing plate (28) that are located venthole (27) below on the top inner wall of harmful gas treatment chamber (4).