Waste gas filtering device for pipe electric arc welding and using method

Abstract

The waste gas filtering device comprises a first filtering mechanism, a second filtering mechanism and a bottom plate, a collecting box is fixedly arranged on one side of the upper end face of the bottom plate, a treatment box is fixedly arranged on the other side of the upper end face of the bottom plate, and an exhaust fan is fixedly arranged on the side, close to the collecting box, of the upper end face of the bottom plate. A supporting rod is fixedly arranged on the upper end face of the collecting box, a first electric push rod and a second electric push rod are installed on one side of the upper end face of the supporting rod through two ball bearings correspondingly, and gas collecting boxes are fixedly arranged at the extending ends of the lower ends of the first electric push rod and the second electric push rod. A collecting pipe is fixedly arranged on the side, away from the exhaust fan, of the outer wall of the collecting box, and a second filtering mechanism is installed at the position, close to the upper end, in the collecting box. The waste gas filtering device provided by the invention not only has various functions and is convenient and rapid to use, but also can better adapt to matched use of various welding tools.

Description

Technical Field

[0001] The invention relates to the technical field of arc waste gas treatment, and in particular to a waste gas filtering device for pipe arc welding and a use method thereof. Background Art

[0002] Arc welding is the same as arc welding with electrodes. Arc welding with electrodes is the most widely used welding method in industrial production. The metal to be welded is used as one electrode and the electrode is used as the other electrode. An arc is generated when the two electrodes are close to each other. The heat generated by the arc discharge (commonly known as arc combustion) is used to melt the electrode and the workpiece together and form a weld after condensation, thereby obtaining a strong joint in the welding process. When arc welding is used to weld pipes, a large amount of gas will be generated. The gas is very harmful to the human body and is easily caused by air pollution when discharged into the air.

[0003] When using arc welding technology to weld pipes, workers are required to manually connect the two pipes, support them, and then weld them. Since a large amount of smoke and dust will be generated during welding, the particles and other harmful substances in the smoke and dust will endanger the health of the operators. If the exhaust gas generated by welding cannot be absorbed and filtered in time, the workers will inhale the exhaust gas and cause damage to their lungs. Current exhaust gas treatment generally uses a filtering purification device to complete the dust removal and purification of the exhaust gas. However, the exhaust gas generated during the welding process may contain a large amount of carbon slag and carbon ash and will produce impurities such as welding debris, which makes filtering and purification difficult.

[0004] Therefore, an exhaust gas filtering device and a method for using the exhaust gas filtering device for arc welding of pipes are proposed to solve the above problems. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention proposes an exhaust gas filtering device for arc welding of pipes, comprising a No. 1 filtering mechanism, a No. 2 filtering mechanism and a base plate, a collecting box is fixedly arranged on one side of the upper end surface of the base plate, a processing box is fixedly arranged on the other side of the upper end surface of the base plate, an exhaust fan is fixedly arranged on the side of the upper end surface of the base plate close to the collecting box, a support rod is fixedly arranged on the upper end surface of the collecting box, and a No. 1 electric push rod and a No. 2 electric push rod are respectively installed on one side of the upper end surface of the support rod through two ball bearings, an air collecting box is fixedly arranged on the lower extended ends of the No. 1 electric push rod and the No. 2 electric push rod, a collecting pipe is fixedly arranged on the side of the outer wall of the collecting box away from the exhaust fan, and the No. 2 filtering mechanism is installed at the upper end of the collecting box.

[0006] Preferably, a No. 1 filter mechanism is installed at the upper end of the processing box, an inner frame is embedded in the processing box, a driving motor is fixedly provided at the upper end of the inner frame and a stirring shaft is fixedly provided at the output end of the driving motor, a plurality of stirring blades are fixedly provided on the outside of the stirring shaft, recovery pipes are fixedly provided at the front and rear ends of one side of the outer wall of the processing box, the No. 1 filter mechanism includes a No. 1 activated carbon plate, a No. 2 activated carbon plate is fixedly provided on one side of the No. 1 activated carbon plate, a holder is fixedly provided at the upper end of one side of the No. 2 activated carbon plate, the No. 2 filter mechanism includes a No. 1 filter mesh plate, a No. 2 filter mesh plate is fixedly provided at the lower end of one side of the No. 1 filter mesh plate, and a baffle is fixedly provided at the lower end of the side of the No. 1 filter mesh plate away from the No. 2 filter mesh plate.

[0007] Preferably, a connecting tube is embedded inside the support rod, and one end of the connecting tube close to the No. 2 electric push rod is located at the rear end of the No. 2 electric push rod and bypasses the No. 2 electric push rod in an arc shape. A corrugated telescopic tube is connected to the lower side of one end of the connecting tube close to the No. 1 electric push rod, and the lower end of the corrugated telescopic tube is connected to the air collecting box, and the lower end of the connecting tube passes through the upper end of the collection box.

[0008] Preferably, a feed port is provided at one end of the collecting pipe away from the collecting box, and the second filter screen is located above the end of the collecting pipe penetrating the collecting box.

[0009] Preferably, the side of the exhaust fan close to the collection box is connected to the collection box through an air inlet pipe, and the side of the exhaust fan away from the collection box is connected to the inner frame through a connecting pipe that penetrates the outer wall of the processing box, and one end of the air inlet pipe that penetrates the collection box is located at the upper end of the baffle and one side of the No. 1 filter plate.

[0010] Preferably, an exhaust port is provided on the upper end surface of the processing box, and bottom wheels are installed at the front and rear ends of both sides of the lower end surface of the bottom plate.

[0011] Preferably, a guide plate is fixedly provided on one side of the inner wall of the treatment box near the upper end, a stop block is fixedly provided on the side of the inner wall of the treatment box opposite to the guide plate, and the No. 2 activated carbon plate is located at the upper end of the stop block.

[0012] Preferably, the No. 2 activated carbon plate is in a transverse V-shape, a groove is provided at the lower end of the holder and the groove is engaged with the outer wall of the treatment box, and a pull ring is fixedly provided on the upper end surface of the holder.

[0013] Preferably, a plurality of through holes are provided on the upper end surface of the inner frame on both sides of the driving motor, and one end of the two recovery pipes passes through the outer wall of the processing box and the other end passes through one side of the outer wall of the inner frame to complete the connection between the inner cavity of the processing box and the inner cavity of the inner frame.

[0014] In addition, the present invention also discloses a method for an exhaust gas filtering device for pipe arc welding, comprising the following steps: Step 1: The exhaust gas passes through the gas collecting box and is collected into the connecting pipe through the bellows expansion pipe under the rotation of the No. 1 electric push rod and the No. 2 electric push rod; Step 2: The waste gas enters the collection box through the connecting pipe, and then passes through the No. 1 filter plate and the No. 2 filter plate to filter out the larger impurities in the waste gas; Step 3: The exhaust gas is then introduced into the inner frame of the treatment box under the negative pressure formed by the exhaust fan, and is filtered twice in the treatment liquid in the inner frame; Step 4: After secondary filtration by the inner frame, the gas floats up and is discharged outside. It is treated by odor absorption by the No. 1 filter mechanism and the filtered gas is discharged through the exhaust port.

[0015] The present invention has the following beneficial effects: 1. The present invention provides a bottom wheel at the lower end of the bottom plate, so that the bottom plate can be quickly and conveniently moved to a suitable area of ​​the welding position for collecting and treating the waste gas; 2. The present invention realizes height adjustment of the gas collecting box by arranging an electric push rod at the upper end of the gas collecting box, so as to better and fully collect and use the exhaust gas; 3. The present invention can quickly collect and use the exhaust gas generated by welding and the impurities dropped during welding by arranging a gas collecting box and a collecting pipe at the lower end of the gas collecting box in combination with a collecting box, and the collecting box has a second filtering mechanism to achieve layered collection and filtering effects; 4. The present invention discharges the collected waste gas into a treatment box, and the driving motor drives the stirring shaft and stirring blades in the treatment box to mix and stir the waste gas and the solution, thereby reducing impurities in the waste gas. When the waste gas overflows the solution and is discharged to the outside, a No. 1 filter mechanism with a certain guiding function is used to extend the direction of the waste gas and treat the odor of the waste gas; 5. The present invention has various functions, is convenient and quick to use, and can be better adapted to the coordinated use of various welding tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the shaft side structure of the present invention; Figure 2 It is a schematic diagram of the front cross-section structure of the present invention; Figure 3 It is a schematic diagram of the top cross-sectional structure of the support rod of the present invention; Figure 4 It is a structural schematic diagram of the first filtering mechanism of the present invention; Figure 5 It is a structural schematic diagram of the second filtering mechanism of the present invention; Figure 6 For the present invention Figure 2 A schematic diagram of the structure at A; In the attached drawings, 1, exhaust port; 2, filter mechanism No. 1; 201, activated carbon plate No. 1; 202, activated carbon plate No. 2; 203, pull ring; 204, holder; 3, treatment box; 4, recovery pipe; 5, bottom wheel; 6, connecting pipe; 7, exhaust fan; 8, bottom plate; 9, collection box; 10, collection pipe; 11, feed port; 12, gas collecting box; 13, electric push rod No. 1; 14, corrugated telescopic pipe; 15, electric push rod No. 2; 16, support rod; 17, air inlet pipe; 18, connecting pipe; 19, filter mechanism No. 2; 1901, filter screen plate No. 1; 1902, filter screen plate No. 2; 1903, baffle; 20, guide plate; 21, drive motor; 22, inner frame; 23, stirring shaft; 24, stirring blade; 25, stop block. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: See also Figures 1 to 6 , an exhaust gas filtering device for arc welding of pipes, comprising a No. 1 filtering mechanism 2, a No. 2 filtering mechanism 19 and a bottom plate 8, a collecting box 9 is fixedly arranged on one side of the upper end surface of the bottom plate 8, a processing box 3 is fixedly arranged on the other side of the upper end surface of the bottom plate 8, an exhaust fan 7 is fixedly arranged on the upper end surface of the bottom plate 8 close to the collecting box 9, a support rod 16 is fixedly arranged on the upper end surface of the collecting box 9, a No. 1 electric push rod 13 and a No. 2 electric push rod 15 are respectively installed on one side of the upper end surface of the support rod 16 through two ball bearings, a gas collecting box 12 is fixedly arranged on the lower extended ends of the No. 1 electric push rod 13 and the No. 2 electric push rod 15, a collecting pipe 10 is fixedly arranged on the side of the outer wall of the collecting box 9 away from the exhaust fan 7, and a No. 2 filtering mechanism 19 is installed at the upper end of the collecting box 9.

[0018] Preferably, a filter mechanism No. 1 is installed at the upper end of the processing box 3, an inner frame 22 is embedded in the processing box 3, a drive motor 21 is fixedly provided at the upper end of the inner frame 22 and a stirring shaft 23 is fixedly provided at the output end of the drive motor 21, a plurality of stirring blades 24 are fixedly provided on the outside of the stirring shaft 23, a recovery pipe 4 is fixedly provided at the front and rear ends of one side of the outer wall of the processing box 3, the filter mechanism No. 1 includes an activated carbon plate No. 1 201, a No. 2 activated carbon plate 202 is fixedly provided on one side of the activated carbon plate No. 1 201, a holder 204 is fixedly provided at the upper end of one side of the activated carbon plate No. 2 202, the filter mechanism No. 2 includes a filter mesh plate No. 1 1901, a No. 2 filter mesh plate 1902 is fixedly provided at the lower end of one side of the filter mesh plate No. 1 1901, and a baffle 1903 is fixedly provided at the lower end of the side of the filter mesh plate No. 1 1901 away from the No. 2 filter mesh plate 1902. When in use, since the air collecting box 12 is located at the lower end of the No. 1 electric push rod 13 and the No. 2 electric push rod 15, and the No. 1 electric push rod 13 and the No. 2 electric push rod 15 are installed on the support rod 16 through ball bearings, that is, the No. 1 electric push rod 13 and the No. 2 electric push rod 15 can independently perform a certain degree of rotation effect. When the No. 1 electric push rod 13 is contracted and the No. 2 electric push rod 15 is extended, or vice versa, the inclination angle of the lower end of the air collecting box 12 can be changed, and when the two are extended or contracted at the same time, the height adjustment of the air collecting box 12 can be achieved; when the drive motor 21 is started to drive the stirring shaft 23 to rotate, the stirring blades 24 are moved together, and then the internal solution, which can be an aqueous solution, an acidic solution or an alkaline solution, will be driven to stir it, thereby accelerating the mixing reaction effect with the exhaust gas.

[0019] Preferably, a connecting pipe 18 is embedded in the support rod 16. The end of the connecting pipe 18 close to the No. 2 electric push rod 15 is located at the rear end of the No. 2 electric push rod 15 and bypasses the No. 2 electric push rod 15 in an arc shape. The lower side of the end of the connecting pipe 18 close to the No. 1 electric push rod 13 is connected to the bellows telescopic pipe 14. The lower end of the bellows telescopic pipe 14 is connected to the gas collecting box 12, and the lower end of the connecting pipe 18 passes through the upper end of the collecting box 9. When the exhaust gas flows into the connecting pipe 18 along the gas collecting box 12 and the bellows telescopic pipe 14, the exhaust gas will gradually be injected into the collecting box 9, and then the larger impurities in the exhaust gas will be filtered when passing through the No. 1 filter screen plate 1901 and the No. 2 filter screen plate 1902. At the same time, the No. 1 filter screen plate 1901, the No. 2 filter screen plate 1902 and the baffle 1903 divide the internal space of the collecting box 9, so that the lower end thereof forms a separate storage space for use.

[0020] Preferably, a feed port 11 is provided at one end of the collecting pipe 10 away from the collecting box 9, and the second filter screen plate 1902 is located above the end of the collecting pipe 10 that passes through the collecting box 9. The second filter screen plate 1902 separates the space at the lower end, and can prevent impurities collected at the lower end from invading the upper space.

[0021] Preferably, the side of the exhaust fan 7 close to the collection box 9 is connected to the collection box 9 through the air inlet pipe 17, and the side of the exhaust fan 7 away from the collection box 9 passes through the outer wall of the treatment box 3 and is connected to the inner frame 22 through the connecting pipe 6. One end of the air inlet pipe 17 that passes through the collection box 9 is located at the upper end of the baffle 1903 and one side of the No. 1 filter screen 1901. When in use, the exhaust fan 7 draws air to form a negative pressure space, thereby forming a negative pressure suction force to complete the suction and collection of waste gas, and the waste gas sucked in by the negative pressure is initially filtered by the No. 2 filter mechanism 19 and then merged into the inner frame 22 inside the treatment box 3 for secondary impurity removal and filtering effect.

[0022] Preferably, the upper end surface of the processing box 3 is provided with an exhaust port 1, and the front and rear ends of both sides of the lower end surface of the bottom plate 8 are equipped with bottom wheels 5. The bottom wheels 5 at the lower end can be used to quickly push it to a designated position for use as needed.

[0023] Preferably, a guide plate 20 is fixedly provided at the upper end of one side of the inner wall of the treatment box 3, and a stopper 25 is fixedly provided at the side of the inner wall of the treatment box 3 opposite to the guide plate 20, and the second activated carbon plate 202 is located at the upper end of the stopper 25. When the exhaust gas floats up and overflows to be discharged, the guide plate 20 plays an auxiliary guiding effect, and the stopper 25 provides a supporting effect for the second activated carbon plate 202, and at the same time uses the second activated carbon plate 202 for auxiliary guidance and odor absorption.

[0024] Preferably, the second activated carbon plate 202 is in a transverse V-shape, a groove is provided at the lower end of the holder 204 and the groove is engaged with the outer wall of the treatment box 3, and a pull ring 203 is fixedly provided on the upper end surface of the holder 204. When in use, the pull ring 203 can be used to quickly take out the entire first filter mechanism 2, and at the same time, due to the transverse V-shaped structure, a double-layer filtering effect can be achieved.

[0025] Preferably, the upper end surface of the inner frame 22 is provided with a plurality of through holes at both sides of the driving motor 21, and one end of the two recovery pipes 4 penetrates the outer wall of the treatment box 3 and the other end penetrates one side of the outer wall of the inner frame 22 to complete the communication between the inner cavity of the treatment box 3 and the inner cavity of the inner frame 22. The waste gas leaking from the inner frame 22 and overflowing into the inner cavity of the treatment box 3 can be recycled and filtered again.

[0026] In addition, the present invention also discloses a method for an exhaust gas filtering device for pipe arc welding, comprising the following steps: Step 1: The exhaust gas passes through the gas collecting box 12, and under the rotation of the No. 1 electric push rod 13 and the No. 2 electric push rod 15, it is collected into the connecting pipe 18 through the bellows telescopic pipe 14; Step 2: The waste gas enters the collection box 9 through the connecting pipe 18, and then passes through the first filter screen 1901 and the second filter screen 1902 to filter out the larger impurities in the waste gas; Step 3: The exhaust gas is then introduced into the inner frame 22 inside the treatment box 3 under the negative pressure formed by the exhaust fan 7, and is filtered twice in the treatment liquid in the inner frame 22; Step 4: After secondary filtration by the inner frame 22, the gas floats up and is discharged to the outside, and is subjected to odor absorption treatment by the first filter mechanism 2. The filtered gas is discharged through the exhaust port 1.

[0027] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An exhaust gas filtering device for pipe arc welding, characterized in that: The invention comprises a first filter mechanism (2), a second filter mechanism (19) and a bottom plate (8); a collecting box (9) is fixedly arranged on one side of the upper end surface of the bottom plate (8); a processing box (3) is fixedly arranged on the other side of the upper end surface of the bottom plate (8); an exhaust fan (7) is fixedly arranged on the side of the upper end surface of the bottom plate (8) close to the collecting box (9); a support rod (16) is fixedly arranged on the upper end surface of the collecting box (9); a first electric push rod (13) and a second electric push rod (15) are respectively mounted on one side of the upper end surface of the support rod (16) through two ball bearings; a gas collecting box (12) is fixedly arranged on the lower extended ends of the first electric push rod (13) and the second electric push rod (15); a collecting pipe (10) is fixedly arranged on the side of the outer wall of the collecting box (9) away from the exhaust fan (7); and a second filter mechanism (19) is mounted inside the collecting box (9) near the upper end.

2. The exhaust gas filtering device for pipe arc welding according to claim 1, characterized in that: A first filter mechanism (2) is installed at the upper end of the processing box (3), an inner frame (22) is embedded in the processing box (3), a drive motor (21) is fixedly installed at the upper end of the inner frame (22), and a stirring shaft (23) is fixedly installed at the output end of the drive motor (21), and a plurality of stirring blades (24) are fixedly installed on the outside of the stirring shaft (23), and a recovery pipe (4) is fixedly installed at the front and rear ends of one side of the outer wall of the processing box (3), and the first filter mechanism (2) includes a first activated carbon plate (201 ), a No. 2 activated carbon plate (202) is fixedly arranged on one side of the No. 1 activated carbon plate (201), a holder (204) is fixedly arranged on one side of the No. 2 activated carbon plate (202) at the upper end, the No. 2 filtering mechanism (19) comprises a No. 1 filter screen plate (1901), a No. 2 filter screen plate (1902) is fixedly arranged on the lower end of one side of the No. 1 filter screen plate (1901), and a baffle (1903) is fixedly arranged on the lower end of a side of the No. 1 filter screen plate (1901) away from the No. 2 filter screen plate (1902).

3. The exhaust gas filtering device for pipe arc welding according to claim 1, characterized in that: A connecting tube (18) is embedded in the support rod (16); one end of the connecting tube (18) close to the No. 2 electric push rod (15) is located at the rear end of the No. 2 electric push rod (15) and bypasses the No. 2 electric push rod (15) in an arc shape; the lower side of one end of the connecting tube (18) close to the No. 1 electric push rod (13) is connected to a corrugated telescopic tube (14); the lower end of the corrugated telescopic tube (14) is connected to the gas collecting box (12); and the lower end of the connecting tube (18) passes through the upper end of the collecting box (9).

4. The exhaust gas filtering device for pipe arc welding according to claim 1, characterized in that: A feed port (11) is provided at one end of the collecting pipe (10) away from the collecting box (9), and the second filter screen plate (1902) is located above the end of the collecting pipe (10) that passes through the collecting box (9).

5. The exhaust gas filtering device for pipe arc welding according to claim 1, characterized in that: The side of the exhaust fan (7) close to the collection box (9) is connected to the collection box (9) via an air inlet pipe (17), and the side of the exhaust fan (7) away from the collection box (9) passes through the outer wall of the processing box (3) and is connected to the inner frame (22) via a connecting pipe (6). One end of the air inlet pipe (17) that passes through the collection box (9) is located at the upper end of the baffle (1903) and one side of the first filter screen plate (1901).

6. The exhaust gas filtering device for pipe arc welding according to claim 1, characterized in that: An exhaust port (1) is provided on the upper end surface of the processing box (3), and bottom wheels (5) are installed at the front and rear ends of both sides of the lower end surface of the bottom plate (8).

7. The exhaust gas filtering device for pipe arc welding according to claim 1, characterized in that: A guide plate (20) is fixedly provided on one side of the inner wall of the treatment box (3) near the upper end, and a stop block (25) is fixedly provided on the side of the inner wall of the treatment box (3) opposite to the guide plate (20), and the second activated carbon plate (202) is located at the upper end of the stop block (25).

8. The exhaust gas filtering device for pipe arc welding according to claim 1, characterized in that: The second activated carbon plate (202) is in a transverse V-shape, a groove is provided at the lower end of the holder (204) and the groove is engaged with the outer wall of the treatment box (3), and a pull ring (203) is fixedly provided on the upper end surface of the holder (204).

9. The exhaust gas filtering device for pipe arc welding according to claim 1, characterized in that: A plurality of through holes are provided on the upper end surface of the inner frame (22) at both sides of the drive motor (21); one end of the two recovery pipes (4) penetrates the outer wall of the processing box (3) and the other end penetrates one side of the outer wall of the inner frame (22) to complete the communication between the inner cavity of the processing box (3) and the inner cavity of the inner frame (22).

10. A method for an exhaust gas filtration device for pipe arc welding according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: the exhaust gas passes through the gas collecting box (12), and under the rotation of the first electric push rod (13) and the second electric push rod (15), it is collected into the connecting pipe (18) through the corrugated telescopic pipe (14); Step 2: Entering the collection box (9) through the connecting pipe (18), and then filtering the larger impurities in the exhaust gas through the first filter screen (1901) and the second filter screen (1902); Step 3: The waste gas is then introduced into the inner frame (22) inside the treatment box (3) under the negative pressure formed by the exhaust fan (7), and is subjected to secondary filtration in the treatment liquid in the inner frame (22); Step 4: After secondary filtration by the inner frame (22), the gas floats up and is discharged to the outside, and is subjected to odor absorption treatment by the first filter mechanism (2). The filtered gas is discharged through the exhaust port (1).

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