Automatic electric arc welding device for valve assembly

Abstract

The invention relates to an automatic electric arc welding device for valve assembling, the automatic electric arc welding device for valve assembling comprises a supporting table, a valve body and a flange sleeve, and an electric sliding rail is installed at the top of the supporting table. A valve body and a flange sleeve are connected to one end of a positioning pipe sleeve in a penetrating and sleeving mode, at the moment, a first motor is started, the first motor can drive a pushing column to horizontally move through a threaded column, namely, a pushing cone is driven to extrude extrusion bases evenly distributed outside in a surrounding mode, and therefore the extrusion bases can drive an external stretching frame to stretch; and the stretching frame is promoted to uniformly extrude the inner wall of the valve body and the inner wall of the flange sleeve, so that the valve body and the flange sleeve can be quickly concentric with the positioning pipe sleeve, the effect of quickly fixing the valve body and the flange sleeve is achieved, the positioning and fixing efficiency of the valve is greatly improved, and the welding machining efficiency of the valve is improved.

Description

Technical Field

[0001] The present invention relates to the field of arc welding devices, and more particularly to an automatic arc welding device for valve assembly. Background Art

[0002] Shielded metal arc welding is the most widely used welding method in industrial production. The metal to be welded serves as one electrode, and the welding rod serves as the other electrode. When the two electrodes approach, an arc is generated. The heat generated by the arc discharge (commonly known as arc combustion) melts the welding rod and the workpiece with each other and forms a weld seam after condensation, thereby obtaining a firmly jointed welding process; Valves are one of the most widely used fluid control devices. As an important part of the pipeline system, valves come in many specifications and types and have different functions. The manufacturing process of valves will directly affect the safe operation of pipeline equipment. Valve welding is one of the key processes in the entire manufacturing process. In order to adapt to the connection between different pipelines, it is often necessary to perform sleeve connection at the valve connection port to meet the actual pipeline connection requirements. The existing treatment methods are mainly connected by welding. During the welding process, the following problems are likely to occur: 1. When welding a valve and a flange pipe sleeve, since the center of the sleeve needs to be unified with the center of the valve connection port, precise positioning is required when fixing the valve and the flange pipe sleeve, which makes the fixing of the valve complex and cumbersome, and thus leads to the problem of low welding efficiency of the valve; 2. At the same time, since the welded valve needs to be inspected at the welding point, it is necessary to wait for the welding point to cool down before manual inspection can be carried out when the valve welding is completed, which leads to the problem of extremely inconvenient inspection after valve welding. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide an automatic arc welding device for valve assembly.

[0004] To solve the above technical problem, an automatic arc welding device for valve assembly provided by the present invention includes a support table, a valve body and a flange sleeve. An electric slide rail is installed on the top of the support table, a sliding seat is installed on the top of the electric slide rail, a sliding table is fixedly connected to the top of the sliding seat, a pushing plate is fixedly connected to the top of the sliding table, a rotating table is movably sleeved inside the pushing plate, a first motor is fixedly installed on the side of the rotating table, a positioning sleeve is fixedly sleeved inside the rotating table, a pushing column is movably sleeved inside the positioning sleeve, a threaded column is fixedly connected to the output shaft of the first motor, a robotic arm is fixedly installed on the top of the support table, a welding torch is fixedly installed on the top of the robotic arm, a pushing cone is fixedly connected to one end of the pushing column, a pressing seat is movably sleeved inside the positioning sleeve, and an extension frame is fixedly connected to the outside of the pressing seat; A detection mechanism is provided on the top of the support platform, a rotation mechanism is provided on the top of the sliding platform, and a cleaning mechanism is provided on the top of the support platform.

[0005] Preferably, the detection mechanism includes a positioning plate fixedly connected to one side of the top of the support platform. A positioning column is fixedly connected to the side surface of the positioning plate, and a wire brush is fixedly connected to one end of the positioning column.

[0006] Preferably, a magnet plate is fixedly connected to the bottom of the extension frame. The number of magnet plates is multiple, and the multiple magnet plates are evenly distributed at the bottom of the multiple extension frames.

[0007] Preferably, the number of electric slide rails is two, and the two electric slide rails are symmetrically distributed with the support platform as the axis of symmetry.

[0008] Preferably, a protective cover is fixedly connected to the side surface of the positioning plate, and the protective cover is movably sleeved outside the positioning tube sleeve.

[0009] Preferably, a limiting strip is fixedly connected to the side surface of the pushing column, and the limiting strip is movably sleeved on the side surface of the inner wall of the positioning tube sleeve.

[0010] Preferably, the rotation mechanism includes a worm gear fixedly sleeved outside the rotating table. A second motor is fixedly installed on the top of the sliding platform, and a worm is fixedly connected to the output shaft of the second motor. The worm is meshed with the worm gear.

[0011] Preferably, the cleaning mechanism includes a storage bucket placed on the top of the support platform. An industrial vacuum cleaner is fixedly installed on the top of the support platform. A suction pipe is fixedly sleeved on the side surface of the industrial vacuum cleaner, and one end of the suction pipe is fixedly sleeved on the top of the storage bucket.

[0012] Preferably, a filter cover is fixedly sleeved at one end of the suction pipe, and the filter cover is made of activated carbon material.

[0013] The beneficial effects of the present invention are as follows: By setting the first motor, when fixing and welding the valve body and the flange sleeve, the valve body and the flange sleeve are inserted and sleeved at one end of the positioning tube sleeve. At this time, the first motor is started, so that the first motor can drive the pushing column to move horizontally through the threaded column, that is, drive the pushing cone to squeeze the extrusion seats evenly distributed outside, so that the extrusion seats can drive the external extension frames to extend, prompting the extension frames to evenly squeeze the inner walls of the valve body and the flange sleeve, so that the valve body and the flange sleeve can be quickly concentric with the positioning tube sleeve, and then the effect of quickly concentrically fixing the valve body and the flange sleeve is achieved, thereby greatly improving the positioning and fixing efficiency of the valve, that is, improving the welding processing efficiency of the valve; By setting up a detection mechanism, when performing circumferential welding of the valve body and the flange sleeve, rotate the rotating table so that the rotating table can drive the valve body to rotate through the positioning bushing, thereby enabling the valve body to drive the welded part to rub against the wire brush, so that the virtual welding slag at the welded part can quickly fall off, and then it is convenient for the staff to observe the weld during the valve body welding, avoiding the time-consuming problem of manual inspection after the valve body welding is completed and cooled during welding inspection, thus improving the convenience of valve welding inspection; By setting up a protective cover, when valve body welding and processing are required, horizontally move the sliding table so that the sliding table can drive the valve body to move horizontally into the protective cover through the positioning bushing, enabling the protective cover to enclose the outside of the valve body, thus avoiding the problem of staff being injured when high-temperature metal debris splashes during valve body welding, thereby improving the safety during valve welding; By setting up a cleaning mechanism, when performing valve welding and processing, start the industrial vacuum cleaner so that the industrial vacuum cleaner can suck the air inside the protective cover through the storage bucket, enabling the metal debris inside the protective cover to enter the storage bucket along with the air, thus achieving the collection effect of welding debris and avoiding the problem of difficult cleaning when the welding debris falls into the welding device, thereby improving the cleanliness inside the welding device. Description of the Drawings

[0014] Figure 1 The front view of an automatic arc welding device for valve assembly according to the present invention; Figure 2 The front view of the push column in an automatic arc welding device for valve assembly according to the present invention; Figure 3 The front view of the positioning bushing in an automatic arc welding device for valve assembly according to the present invention; Figure 4 The side view of the positioning bushing in an automatic arc welding device for valve assembly according to the present invention Figure 5 The front view of the rotating mechanism in an automatic arc welding device for valve assembly according to the present invention; Figure 6 The front view of the support table in an automatic arc welding device for valve assembly according to the present invention; Figure 7 The top view of the support table in an automatic arc welding device for valve assembly according to the present invention; Figure 8 The top view of the protective cover in an automatic arc welding device for valve assembly according to the present invention.

[0015] The names of the components corresponding to the respective labels in the above-mentioned drawings are as follows: 1. Support platform; 2. Valve body; 3. Flange sleeve; 4. Electric slide rail; 5. Sliding seat; 6. Sliding table; 7. Pushing plate; 8. Rotary table; 9. First motor; 10. Positioning pipe sleeve; 11. Pushing column; 12. Threaded column; 13. Robot arm; 14. Welding torch; 15. Pushing cone; 16. Extrusion seat; 17. Extension frame; 18. Detection mechanism; 181. Positioning plate; 182. Positioning column; 183. Wire brush; 19. Rotation mechanism; 191. Worm gear; 192. Second motor; 193. Worm; 20. Cleaning mechanism; 201. Storage barrel; 202. Industrial vacuum cleaner; 203. Suction pipe; 21. Magnet plate; 22. Protective cover; 23. Limit strip; 24. Filter cover. Detailed implementation manners

[0016] The following further elaborates in detail on the detailed implementation manners of the present invention in conjunction with the drawings.

[0017] As Figures 1-4As shown in the figure, an automatic arc welding device for valve assembly provided by the present invention includes a support table 1, a valve body 2, and a flange sleeve 3. An electric slide rail 4 is installed on the top of the support table 1, a sliding seat 5 is installed on the top of the electric slide rail 4, a sliding table 6 is fixedly connected to the top of the sliding seat 5, a pushing plate 7 is fixedly connected to the top of the sliding table 6, a rotating table 8 is movably sleeved inside the pushing plate 7, a first motor 9 is fixedly installed on the side of the rotating table 8, a positioning pipe sleeve 10 is fixedly sleeved inside the rotating table 8, a pushing column 11 is movably sleeved inside the positioning pipe sleeve 10, a threaded column 12 is fixedly connected to the output shaft of the first motor 9, a robotic arm 13 is fixedly installed on the top of the support table 1, a welding torch 14 is fixedly installed on the top of the robotic arm 13, one end of the pushing column 11 is fixedly connected to a pushing cone 15, an extrusion seat 16 is movably sleeved inside the positioning pipe sleeve 10, an extension frame 17 is fixedly connected to the outside of the extrusion seat 16, a detection mechanism 18 is arranged on the top of the support table 1, a rotating mechanism 19 is arranged on the top of the sliding table 6, and a cleaning mechanism 20 is arranged on the top of the support table 1; by setting the first motor 9, when fixedly welding the valve body 2 and the flange sleeve 3, the valve body 2 and the flange sleeve 3 are inserted and sleeved at one end of the positioning pipe sleeve 10. At this time, the first motor 9 is started, so that the first motor 9 drives the pushing column 11 to move horizontally through the threaded column 12, that is, drives the pushing cone 15 to extrude the extrusion seats 16 evenly distributed around the outside, so that the extrusion seats 16 drive the extension frames 17 outside to extend, prompting the extension frames 17 to evenly extrude the inner walls of the valve body 2 and the flange sleeve 3, so that the valve body 2 and the flange sleeve 3 can quickly become concentric with the positioning pipe sleeve 10, and then the quick concentric fixing effect of the valve body 2 and the flange sleeve 3 is achieved, thus greatly improving the positioning and fixing efficiency of the valve, that is, improving the welding processing efficiency of the valve.

[0018] Please refer to Figure 1 , Figure 7 and Figure 8 , the detection mechanism 18 includes a positioning plate 181, the positioning plate 181 is fixedly connected to one side of the top of the support table 1, a positioning column 182 is fixedly connected to the side of the positioning plate 181, and a wire brush 183 is fixedly connected to one end of the positioning column 182; by setting the detection mechanism 18, when performing circumferential welding on the valve body 2 and the flange sleeve 3, the rotating table 8 is rotated, so that the rotating table 8 drives the valve body 2 to rotate through the positioning pipe sleeve 10, so that the valve body 2 drives the welded part to rub against the wire brush 183, so that the virtual welding slag at the welded part can quickly fall off, and then it is convenient for the staff to observe the weld seam during the welding of the valve body 2, avoiding the problem of time-consuming manual inspection when waiting for the valve body 2 to cool down after welding, thus improving the convenience of valve welding inspection.

[0019] Please refer to Figures 2-4, a magnet plate 21 is fixedly connected to the bottom of the stretching frame 17. The number of magnet plates 21 is multiple, and the multiple magnet plates 21 are evenly distributed at the bottom of the multiple stretching frames 17. By setting the magnet plate 21, when the valve welding is completed, start the first motor 9, so that the first motor 9 can drive the pushing column 11 to move horizontally in the reverse direction through the threaded column 12, that is, drive the pushing cone 15 to move in the reverse direction. At this time, rotate the positioning sleeve 10, so that the positioning sleeve 10 can drive the stretching frame 17 to rotate. When the stretching frame 17 rotates to directly above the positioning sleeve 10, it will perform a free fall motion, so that the magnet plate 21 can drive the stretching frame 17 to be adsorbed and fixed inside the positioning sleeve 10, thus achieving the storage and fixing effect of the stretching frame 17, which brings convenience to the multiple fixings of the valve.

[0020] Please refer to Figure 1 , Figure 6 and Figure 8 , the number of electric sliding rails 4 is two, and the two electric sliding rails 4 are symmetrically distributed with the support table 1 as the axis of symmetry. By setting the electric sliding rail 4, when the fixing of the valve body 2 is completed, start the electric sliding rail 4, so that the electric sliding rail 4 can drive the sliding table 6 to move horizontally through the sliding seat 5, that is, drive the valve body 2 to move horizontally through the positioning sleeve 10, thus achieving the adjustment effect of the welding position of the valve body 2.

[0021] Please refer to Figure 1 , Figure 6 and Figure 8 , a protective cover 22 is fixedly connected to the side of the positioning plate 181, and the protective cover 22 is movably sleeved outside the positioning sleeve 10. By setting the protective cover 22, when welding and processing the valve body 2 is required, horizontally move the sliding table 6, so that the sliding table 6 can drive the valve body 2 to move horizontally into the C-shaped protective cover 22 through the positioning sleeve 10, so that the C-shaped protective cover 22 can enclose the outside of the valve body 2, thus avoiding the problem that the staff is injured when high-temperature metal chips splash everywhere during the welding of the valve body 2, thereby improving the safety during valve welding.

[0022] Please refer to Figure 2 , a limiting strip 23 is fixedly connected to the side of the pushing column 11, and the limiting strip 23 is movably sleeved on the side of the inner wall of the positioning sleeve 10. By setting the limiting strip 23, when the first motor 9 drives the pushing column 11 to move horizontally through the threaded column 12, the limiting strip 23 can limit the horizontally moving pushing column 11, so as to avoid the problem that the threaded column 12 drives the pushing column 11 to move and deflect, thus achieving the limiting effect when the pushing column 11 moves horizontally, that is, improving the stability of the horizontal movement of the pushing cone 15.

[0023] Please refer to Figure 5 , Figure 7 and Figure 8, the rotating mechanism 19 includes a worm gear 191. The worm gear 191 is fixedly sleeved outside the rotating table 8. A second motor 192 is fixedly installed on the top of the sliding table 6. A worm 193 is fixedly connected to the output shaft of the second motor 192. The worm 193 is meshed with the worm gear 191. By setting the rotating mechanism 19, when performing the circular welding of the valve body 2, the second motor 192 is started, so that the second motor 192 can drive the worm gear 191 to rotate slowly through the worm 193, that is, drive the rotating table 8 to rotate slowly, so that the rotating table 8 can drive the valve body 2 to rotate slowly through the positioning pipe sleeve 10, and then achieve the rotating effect during the welding of the valve body 2, thus bringing convenience to the circular welding of the valve.

[0024] Please refer to Figure 6 , the cleaning mechanism 20 includes a storage barrel 201. The storage barrel 201 is placed on the top of the support table 1. An industrial vacuum cleaner 202 is fixedly installed on the top of the support table 1. A suction pipe 203 is fixedly sleeved on the side of the industrial vacuum cleaner 202. One end of the suction pipe 203 is fixedly sleeved on the top of the storage barrel 201. By setting the cleaning mechanism 20, when performing the valve welding process, the industrial vacuum cleaner 202 is started, so that the industrial vacuum cleaner 202 can suck the air inside the protective cover 22 through the storage barrel 201, so that the metal debris inside the protective cover 22 can enter the inside of the storage barrel 201 along with the air, thus achieving the collection effect of the welding debris, and avoiding the problem that it is difficult to clean when the welding debris falls into the welding device, thereby improving the cleanliness inside the welding device.

[0025] Please refer to Figure 1 and Figure 6 , a filter cover 24 is fixedly sleeved at one end of the suction pipe 203. The filter cover 24 is made of activated carbon material. By setting the filter cover 24, when sucking the welding exhaust gas, the filter cover 24 can adsorb and filter the nitrogen oxides in the exhaust gas, so as to avoid the problem that the nitrogen oxides are directly discharged into the air when the exhaust gas is discharged, resulting in the pollution of the air around the welding device, thereby improving the cleanliness during the valve welding.

[0026] The working principle of the present invention is as follows: When fixedly welding the valve body 2 and the flange sleeve 3, the valve body 2 and the flange sleeve 3 are inserted and sleeved on one end of the positioning sleeve 10. At this time, the first motor 9 is started, so that the first motor 9 can drive the pushing column 11 to move horizontally through the threaded column 12, that is, drive the pushing cone 15 to squeeze the extrusion seats 16 evenly distributed on the outside, so that the extrusion seats 16 can drive the external extension frames 17 to extend, prompting the extension frames 17 to evenly squeeze the inner walls of the valve body 2 and the flange sleeve 3, so that the valve body 2 and the flange sleeve 3 can be quickly concentric with the positioning sleeve 10, that is, the effect of quickly concentric the valve body 2 and the flange sleeve 3 is achieved, and then the effect of quickly concentrically fixing the valve body 2 and the flange sleeve 3 is achieved, thus greatly improving the positioning and fixing efficiency of the valve, that is, improving the welding processing efficiency of the valve. When performing the circumferential welding of the valve body 2 and the flange sleeve 3, the rotating table 8 is rotated, so that the rotating table 8 can drive the valve body 2 to rotate through the positioning sleeve 10, so that the valve body 2 can drive the welding part to rub against the wire brush 183, so that the virtual welding slag at the welding part can quickly fall off, and then it is convenient for the staff to observe the weld seam when welding the valve body 2, avoiding the problem of time-consuming manual inspection when waiting for the valve body 2 to cool down after welding inspection, thus improving the convenience of valve welding inspection. When the valve welding is completed, the first motor 9 is started, so that the first motor 9 can drive the pushing column 11 to move horizontally in the reverse direction through the threaded column 12, that is, drive the pushing cone 15 to move in the reverse direction. At this time, the positioning sleeve 10 is rotated, so that the positioning sleeve 10 can drive the extension frame 17 to rotate. When the extension frame 17 rotates to the directly above the positioning sleeve 10, it can perform a free fall motion, so that the magnet plate 21 can drive the extension frame 17 to be adsorbed and fixed inside the positioning sleeve 10, and then the effect of storing and fixing the extension frame 17 is achieved, thus bringing convenience for multiple fixings of the valve. When the fixing of the valve body 2 is completed, the electric slide rail 4 is started, so that the electric slide rail 4 can drive the sliding table 6 to move horizontally through the sliding seat 5, that is, drive the valve body 2 to move horizontally through the positioning sleeve 10, thus achieving the effect of adjusting the welding position of the valve body 2. When the valve body 2 needs to be welded, the sliding table 6 is moved horizontally, so that the sliding table 6 can drive the valve body 2 to move horizontally into the inside of the protective cover 22 through the positioning sleeve 10, so that the protective cover 22 can enclose the outside of the valve body 2, thus avoiding the problem that the staff is injured when high-temperature metal debris splashes during the welding of the valve body 2, thus improving the safety during valve welding. When the first motor 9 drives the pushing column 11 to move horizontally through the threaded column 12, the limiting strip 23 can limit the horizontally moving pushing column 11, avoiding the problem that the threaded column 12 drives the pushing column 11 to deflect when moving, thus achieving the limiting effect when the pushing column 11 moves horizontally, that is, improving the stability when the pushing cone 15 moves horizontally. When performing the circumferential welding of the valve body 2, the second motor 192 is started,The second motor 192 is enabled to drive the worm wheel 191 to rotate slowly through the worm 193, that is, to drive the rotary table 8 to rotate slowly, so that the rotary table 8 can drive the valve body 2 to rotate slowly through the positioning pipe sleeve 10, and then the rotary effect during the welding of the valve body 2 is achieved, thus bringing convenience to the circular welding of the valve. When performing the valve welding process, the industrial vacuum cleaner 202 is started, so that the industrial vacuum cleaner 202 can suck the air inside the protective cover 22 through the storage barrel 201, and the metal debris inside the protective cover 22 can enter the inside of the storage barrel 201 along with the air, thus achieving the collection effect of the welding debris, avoiding the problem that it is difficult to clean when the welding debris falls into the welding device, and improving the cleanliness inside the welding device. When sucking the welding exhaust gas, the filter cover 24 can adsorb and filter the nitrogen oxides in the exhaust gas, avoiding the problem that the nitrogen oxides are directly discharged into the air when the exhaust gas is discharged, resulting in the pollution of the air around the welding device, and thus improving the cleanliness during the valve welding.

[0027] It should be noted that the present invention is not limited to the specific structure shown in the drawings in the above embodiments, and various changes can be made within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. An automatic arc welding device for valve assembly, characterized in that, It includes a support platform (1), a valve body (2) and a flange sleeve (3). An electric slide rail (4) is installed on the top of the support platform (1). A sliding seat (5) is installed on the top of the electric slide rail (4). A sliding platform (6) is fixedly connected to the top of the sliding seat (5). A pushing plate (7) is fixedly connected to the top of the sliding platform (6). A rotating platform (8) is movably sleeved inside the pushing plate (7). A first motor (9) is fixedly installed on the side of the rotating platform (8). A positioning pipe sleeve (10) is fixedly sleeved inside the rotating platform (8). A pushing column (11) is movably sleeved inside the positioning pipe sleeve (10). A threaded column (12) is fixedly connected to the output shaft of the first motor (9). A robotic arm (13) is fixedly installed on the top of the support platform (1). A welding torch (14) is fixedly installed on the top of the robotic arm (13). One end of the pushing column (11) is fixedly connected to a pushing cone (15). An extrusion seat (16) is movably sleeved inside the positioning pipe sleeve (10). An extension frame (17) is fixedly connected to the outside of the extrusion seat (16). A detection mechanism (18) is arranged on the top of the support platform (1). A rotation mechanism (19) is arranged on the top of the sliding platform (6). A cleaning mechanism (20) is arranged on the top of the support platform (1).

2. The automatic arc welding device for valve assembly according to claim 1, characterized in that, The detection mechanism (18) includes a positioning plate (181). The positioning plate (181) is fixedly connected to one side of the top of the support platform (1). A positioning column (182) is fixedly connected to the side of the positioning plate (181). A wire brush (183) is fixedly connected to one end of the positioning column (182).

3. An automatic arc welding device for valve assembly according to claim 1, characterized in that, A magnet plate (21) is fixedly connected to the bottom of the extension frame (17). The number of the magnet plates (21) is multiple. The multiple magnet plates (21) are evenly distributed at the bottom of the multiple extension frames (17).

4. An automatic arc welding device for valve assembly according to claim 1, characterized in that, The number of the electric slide rails (4) is two. The two electric slide rails (4) are symmetrically distributed with the support platform (1) as the axis of symmetry.

5. An automatic arc welding device for valve assembly according to claim 2, characterized in that, A protective cover (22) is fixedly connected to the side of the positioning plate (181). The protective cover (22) is movably sleeved outside the positioning pipe sleeve (10).

6. The automatic arc welding device for valve assembly according to claim 1, characterized in that, A limiting strip (23) is fixedly connected to the side of the pushing column (11). The limiting strip (23) is movably sleeved on the side of the inner wall of the positioning pipe sleeve (10).

7. An automatic arc welding device for valve assembly according to claim 1, characterized in that, The rotation mechanism (19) includes a worm gear (191). The worm gear (191) is fixedly sleeved outside the rotating platform (8). A second motor (192) is fixedly installed on the top of the sliding platform (6). A worm (193) is fixedly connected to the output shaft of the second motor (192). The worm (193) is meshed with the worm gear (191).

8. An automatic arc welding device for valve assembly according to claim 1, characterized in that, The cleaning mechanism (20) includes a storage bucket (201), the storage bucket (201) is placed on the top of the support platform (1), an industrial vacuum cleaner (202) is fixedly installed on the top of the support platform (1), a suction pipe (203) is fixedly sleeved on the side of the industrial vacuum cleaner (202), and one end of the suction pipe (203) is fixedly sleeved on the top of the storage bucket (201).

9. An automatic arc welding device for valve assembly according to claim 8, characterized in that, A filter cover (24) is fixedly sleeved at one end of the suction pipe (203), and the filter cover (24) is made of activated carbon material.

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