A telescopic house welding fume collection and disposal device

By using a telescopic frame and a driving mechanism in the telescopic room, the position of the vacuum cleaner varies with the change of the telescopic room and drives the vacuum cleaner to swing, the problem of poor smoke collection effect caused by the fixed position of the vacuum cleaner in the prior art is solved, and efficient and multi-directional smoke collection is achieved.

CN114054459BActive Publication Date: 2025-06-13QINGDAO HUIJINTONG ELECTRIC POWER EQUIP
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Patent Information

Application Number
CN202111311779.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-11-08
Publication Date
2025-06-13
Estimated Expiration
2041-11-08

AI Technical Summary

Technical Problem

In the prior art, the position of the vacuum cleaner cannot change with the change of the area of ​​the telescopic room, resulting in poor smoke collection effect.

Method used

The telescopic frame and driving mechanism are adopted. The telescopic frame expands and closes the vacuum cover, so that its position changes with the change of the telescopic chamber. At the same time, the driving mechanism drives the vacuum cover to swing, achieving multi-directional vacuuming.

Benefits of technology

It realizes flexible adjustment of the position of the vacuum hood, improves the smoke collection effect, expands the vacuum area, and accelerates the smoke collection efficiency.

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Abstract

The present invention discloses a telescopic room welding fume collection and disposal device, which includes a fume purifier. A telescopic frame is arranged in the telescopic room. The telescopic frame includes a fixed seat, a plurality of horizontally arranged and parallel cross bars, a first telescopic component and a second telescopic component located on both sides of the fixed seat. The first telescopic component and the second telescopic component are both used to unfold each cross bar; a dust suction hood is arranged below each cross bar, a dust suction fan is rotatably arranged in the dust suction hood, a driving mechanism for driving the dust suction fan is arranged on the cross bar, a telescopic hose is communicated between two adjacent dust suction hoods, and the telescopic hose near one end of the fixed seat is communicated with the dust suction port of the fume purifier. This application solves the technical problem in the prior art that the position of the dust suction hood cannot change with the change of the area of the telescopic room, affecting the fume collection effect, and realizes that the position of the dust suction hood can change with the change of the telescopic room, can collect the fumes in the telescopic room in multiple directions, and improves the fume collection effect.
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Description

Technical Field

[0001] The present invention relates to the field of soot collection and treatment, and particularly to a telescopic room welding soot collection and disposal device. Background Art

[0002] With the development of welding technology, in recent years, flux cored wire gas shielded welding has been mostly adopted, but its dust emission rate has also increased significantly. The sharp increase in the dust emission rate generates a large amount of welding fumes, and welding fumes are extremely harmful to the human body. Therefore, in some welding workshops, soot collection devices are used to collect and treat welding fumes.

[0003] In order to facilitate the change of the welding site more conveniently, a telescopic room is used as the welding site. However, since the area of the telescopic room will change, the position of the suction hood in the soot collection device cannot change with the change of the area of the telescopic room, so that multi-directional collection of soot cannot be achieved, affecting the soot collection effect. Summary of the Invention

[0004] By providing a telescopic room welding soot collection and disposal device in an embodiment of the present application, the technical problem in the prior art that the position of the suction hood cannot change with the change of the area of the telescopic room, affecting the soot collection effect, is solved. It is realized that the position of the suction hood can change with the change of the telescopic room, and the soot in the telescopic room can be collected in multiple directions, improving the soot collection effect.

[0005] An embodiment of the present application provides a telescopic room welding soot collection and disposal device, including a soot purifier installed outside the telescopic room and used for purifying soot. A telescopic frame is arranged in the telescopic room. The telescopic frame includes a fixed seat fixedly connected to the non-mobile end of the telescopic room, a plurality of horizontally arranged and parallel cross bars, a first telescopic component and a second telescopic component located on both sides of the fixed seat. The first telescopic component and the second telescopic component are both used to expand and combine each cross bar. Among them, a suction hood is arranged below each cross bar. A suction fan is rotatably arranged in the suction hood. A driving mechanism for driving the suction fan is arranged on the cross bar. A telescopic hose is connected between adjacent two suction hoods. The telescopic hose near one end of the fixed seat is communicated with the suction port of the soot purifier.

[0006] Further, the first telescopic assembly includes a first horizontal swing rod that swings horizontally and has one end hinged to the fixed seat, and a second horizontal swing rod that swings horizontally and has its middle portion hinged to one end of the cross bar. The ends of two adjacent second horizontal swing rods are hinged to each other, and the end of the first horizontal swing rod away from the fixed seat is hinged to the end of the second horizontal swing rod; the second telescopic assembly includes an extension rod horizontally fixed to the side wall of the fixed seat, a first vertical swing rod that swings vertically and has one end hinged to the end of the extension rod, and a second vertical swing rod that swings vertically and has its middle portion hinged to the other end of the cross bar. The ends of two adjacent second vertical swing rods are hinged to each other, and the end of the first vertical swing rod away from the extension rod is hinged to the end of the second vertical swing rod.

[0007] Further, a vertically arranged telescopic rod is rotatably arranged at the hinge joint of the extension rod and the first vertical swing rod.

[0008] Further, the driving mechanism includes a transfer rod vertically fixed to the bottom surface of the middle portion of the cross bar, an inclined rod inclined and fixed to the bottom of the transfer rod, a long swing bar hinged to the bottom of the transfer rod, a first worm wheel rotatably arranged at the bottom end of the swing bar, a short swing bar swinging vertically and coaxially connected to the first worm wheel, a connecting bar hinged between the short swing bar and the inclined rod, a side plate frame fixed to the side wall of the long swing bar, a first rotating rod parallel to the long swing bar and rotatably arranged on the side plate frame, a driving motor fixed to the side plate frame and used to drive the first rotating rod to rotate, a first worm coaxially connected to the first rotating rod and meshing with the first worm wheel. The first rotating rod extends into the dust suction hood and is coaxially connected to the rotating shaft of the dust suction fan.

[0009] Further, a support pipe is communicated at the connection between the end of the telescopic hose close to the fume purifier and the dust suction hood. A negative pressure fan is rotatably arranged in the support pipe. A first support frame is fixedly connected to the top surface of the dust suction hood. The driving mechanism further includes a second worm coaxially connected to the first worm wheel and rotatably arranged on the first support frame, a second rotating rod vertically arranged and rotatably arranged on the first support frame, a second worm wheel coaxially connected to the second rotating rod and meshing with the second worm, a third rotating rod coaxially connected to the rotating shaft of the negative pressure fan, a third worm wheel coaxially connected to the third rotating rod, a third worm coaxially connected to the second rotating rod and meshing with the third worm wheel. A second support frame is arranged in the dust suction hood. The end of the third rotating rod away from the negative pressure fan is rotatably arranged on the second support frame, and the end of the second rotating rod away from the first support frame is rotatably arranged on the second support frame.

[0010] Further, a first sealing bearing and a second sealing bearing coaxially connected to the first rotating rod and the second rotating rod are respectively embedded in the top of the dust suction hood.

[0011] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0012] 1. Since the telescopic frame is adopted, each dust suction hood can be unfolded or folded, solving the problem that the position of the dust suction hood in the prior art cannot be changed with the change of the area of the telescopic room, realizing multi-directional collection of the soot in the telescopic room and improving the soot collection effect.

[0013] 2. Since the driving mechanism is adopted, the dust suction hood can be continuously swung, so that the dust suction hood can suck dust from all directions, further expanding the dust suction area and further improving the soot collection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the soot collection and disposal device in the telescopic room in the embodiment of the present application;

[0015] Figure 2 It is a schematic diagram of the overall structure of the telescopic frame in the embodiment of the present application;

[0016] Figure 3 is Figure 2 a schematic diagram of a partial structure in, mainly showing a partial structure of the driving mechanism;

[0017] Figure 4 is Figure 3 a schematic cross-sectional view of a partial structure in, mainly showing the structure inside the dust suction hood;

[0018] Figure 5 is Figure 4 an enlarged schematic diagram of part A in, mainly showing the structure of another part of the driving mechanism;

[0019] In the figure: 100, telescopic room; 1, soot purifier; 2, telescopic frame; 200, telescopic rod; 21, fixed seat; 22, cross bar; 23, telescopic assembly one; 231, horizontal swing rod one; 232, horizontal swing rod two; 24, telescopic assembly two; 241, extension rod; 242, vertical swing rod one; 243, vertical swing rod two; 3, dust suction hood; 31, sealed bearing one; 32, sealed bearing two; 4, dust suction fan; 5, driving mechanism; 501, adapter rod; 502, inclined rod; 503, long swing bar; 504, worm wheel one; 505, short swing bar; 506, connecting bar; 507, side plate frame; 508, rotating rod one; 509, driving motor; 510, worm one; 511, worm two; 512, rotating rod two; 513, worm wheel two; 514, rotating rod three; 515, worm wheel three; 516, worm three; 6, telescopic hose; 61, support pipe; 7, negative pressure fan; 8, support frame one; 9, support frame two. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] An embodiment of the present application discloses a telescopic room welding fume collection and disposal device. Through the telescopic frame 2, each dust suction hood 3 can be unfolded and folded. During the unfolding process, the same unfolding spacing is always maintained between each dust suction hood 3, so that the unfolded dust suction hoods 3 are evenly distributed. And by using the driving mechanism 5, while the dust suction hood 3 swings, it can also drive the negative pressure fan 7 in the telescopic hose 6 to rotate. Therefore, not only can the dust suction area of the dust suction hood 3 be increased, but also the fume flow in the telescopic hose 6 can be made faster, accelerating the fume collection efficiency.

[0021] To better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the specification drawings and specific implementation manners.

[0022] Refer to Figure 1 , a telescopic room welding fume collection and disposal device, including a fume purifier 1, a telescopic frame 2 and a dust suction hood 3. The fume purifier 1 is installed on the non-mobile end outside the telescopic room 100, and the fume purifier 1 can suck fumes and purify them. The telescopic frame 2 is installed inside the telescopic room 100 and at the top of the telescopic room 100. A plurality of dust suction hoods 3 are provided and are all installed on the telescopic frame 2.

[0023] Refer to Figure 2 , the telescopic direction of the telescopic frame 2 is the same as the telescopic direction of the telescopic room 100. The telescopic frame 2 includes a fixed seat 21, a cross bar 22, a first telescopic component 23 and a second telescopic component 24. The fixed seat 21 is fixed to the non-mobile end of the telescopic room 100, and the fixed seat 21 is close to the top of the telescopic room 100. The cross bar 22 is a strip-shaped rod, and the length direction of the cross bar 22 is perpendicular to the telescopic direction of the telescopic room 100. A number of cross bars 22 are provided, and the number of cross bars 22 are parallel to each other and are evenly distributed along the telescopic direction of the telescopic room 100, and the spacing between adjacent two cross bars 22 is the same.

[0024] Refer to Figure 2, the first telescopic assembly 23 includes a first horizontal swing rod 231 and a second horizontal swing rod 232; the first horizontal swing rod 231 is horizontally arranged and one end is hinged to the top surface of the fixed seat 21, and the first horizontal swing rod 231 swings horizontally; several second horizontal swing rods 232 are provided and are respectively located on each cross bar 22, the middle of the second horizontal swing rod 232 is hinged to the end of one end of the cross bar 22, the second horizontal swing rod 232 swings horizontally, and the ends between adjacent second horizontal swing rods 232 are hinged to each other, and the end of the first horizontal swing rod 231 far from the fixed seat 21 is hinged to the end of the second horizontal swing rod 232. The part of the second horizontal swing rod 232 in the first telescopic assembly 23 that is farthest from the fixed seat 21 and extends out of the cross bar 22 can be cut off. The second telescopic assembly 24 includes an extension rod 241, a first vertical swing rod 242 and a second vertical swing rod 243; the extension rod 241 is vertically fixed to the side wall of the fixed seat 21, the length direction of the extension rod 241 is the same as the length direction of the cross bar 22, and the end of the extension rod 241 far from the fixed seat 21 extends to the side away from the first telescopic assembly 23; one end of the first vertical swing rod 242 is hinged to the end of the extension rod 241 far from the fixed seat 21, and the first vertical swing rod 242 swings vertically; several second vertical swing rods 243 are provided and are respectively located on each cross bar 22, the middle of the second vertical swing rod 243 is hinged to the end of the other end of the cross bar 22, the second vertical swing rod 243 swings vertically, and the ends between adjacent second vertical swing rods 243 are hinged to each other, and the end of the first vertical swing rod 242 far from the extension rod 241 is hinged to the end of the second horizontal swing rod 232. The part of the second vertical swing rod 243 in the second telescopic assembly 24 that is farthest from the extension rod 241 and extends out of the cross bar 22 can be cut off.

[0025] Referring to Figure 2 , several dust suction hoods 3 are respectively located below each cross bar 22, the opening of the dust suction hood 3 faces downward, a dust suction fan 4 is rotatably arranged in the dust suction hood 3, and a driving mechanism 5 for driving the dust suction fan 4 to rotate is arranged on each cross bar 22. A telescopic hose 6 is connected between adjacent two dust suction hoods 3, and the connection part of the telescopic hose 6 and the dust suction hood 3 is located above the dust suction fan 4. Among them, the telescopic hose 6 closest to the fixed seat 21 is connected to the dust suction port of the fume purifier 1. In addition, a vertically arranged telescopic rod 200 is rotatably arranged at the hinge joint of the extension rod 241 and the first vertical swing rod 242. When the operator needs to operate the telescopic frame 2, the telescopic rod 200 can be extended, and then the first vertical swing rod 242 can be pushed upward by using the telescopic rod 200, so that the first telescopic assembly 23 and the second telescopic assembly 24 can be unfolded, and further several cross bars 22 can be unfolded away from each other. And during the unfolding process, the same unfolding distance is always maintained between the dust suction hoods 3, so that the unfolded dust suction hoods 3 are evenly distributed to improve the dust suction efficiency.

[0026] Referring to Figure 3 and Figure 4, one end of the telescopic hose 6 close to the fume purifier 1 is connected to the connection part of the dust suction hood 3 with a support pipe 61. The support pipe 61 is made of hard material. A negative pressure fan 7 is rotatably arranged in the support pipe 61. The air flow direction of the negative pressure fan 7 is from the dust suction hood 3 to the telescopic hose 6. A first support frame 8 is fixedly connected to the top surface of the dust suction hood 3, and the first support frame 8 corresponds to the pipe orifice of the telescopic hose 6. The driving mechanism 5 includes a transfer rod 501, an inclined rod 502, a long swing bar 503, a first worm gear 504, a short swing bar 505, a connecting bar 506, a side plate frame 507, a first rotating rod 508, a driving motor 509, a first worm 510, a second worm 511, a second rotating rod 512, a second worm gear 513, a third rotating rod 514, a third worm gear 515, and a third worm 516. The transfer rod 501 is a square rod, which is vertically arranged. One end of the transfer rod 501 is fixedly connected to the middle of the bottom surface of the cross bar 22, and the other end is located below the cross bar 22; the inclined rod 502 is inclined, one end of the inclined rod 502 is fixedly connected to the bottom end of the transfer rod 501, and the other end of the inclined rod 502 is inclined downward and located on one side of the transfer rod 501; the long swing bar 503 is located below the transfer rod 501, and one end of the long swing bar 503 is hinged to the bottom of the transfer rod 501; the first worm gear 504 is rotatably arranged at the end of the long swing bar 503 away from the transfer rod 501, and the rotation axis of the first worm gear 504 is horizontally arranged; the length of the short swing bar 505 is less than that of the long swing bar 503, and the length of the short swing bar 505 is less than the diameter of the first worm gear 504. One end of the short swing bar 505 is coaxially connected to the rotating shaft of the first worm gear 504; one end of the connecting bar 506 is hinged to the end of the short swing bar 505 away from the long swing bar 503, and the other end of the connecting bar 506 is hinged to the end of the inclined rod 502 away from the transfer rod 501; the side plate frame 507 is fixed to the end of the long swing bar 503 close to the transfer rod 501, and the side plate frame 507 extends to the side away from the long swing bar 503; one end of the first rotating rod 508 is rotatably arranged at the end of the side plate frame 507 away from the long swing bar 503, and the other end passes through the dust suction hood 3 and is coaxially connected to the dust suction fan 4. A first sealing bearing 31 coaxially connected to the first rotating rod 508 is embedded in the top of the dust suction hood 3; the driving motor 509 is installed on the side plate frame 507, and the driving motor 509 is used to drive the first rotating rod 508 to rotate; the first worm 510 is coaxially connected to the first rotating rod 508 and meshes with the first worm gear 504.

[0027] Refer to Figure 4 and Figure 5, the worm gear two 511 is coaxially connected to the rotating shaft of the worm wheel one 504, and the worm gear two 511 is rotatably arranged on the first support frame 8 of the dust suction cover 3; the rotating rod two 512 is vertically arranged and rotatably arranged on the first support frame 8, and the end of the rotating rod two 512 away from the first support frame 8 extends into the dust suction cover 3. A second sealing bearing 32 coaxially connected to the rotating rod two 512 is embedded in the top of the dust suction cover 3; the worm wheel two 513 is coaxially connected to the rotating rod two 512, and the worm wheel two 513 meshes with the worm gear two 511; one end of the rotating rod three 514 is coaxially connected to the rotating shaft of the negative pressure fan 7, and the other end of the rotating rod three 514 is rotatably arranged on the second support frame 9 in the dust suction cover 3; the worm wheel three 515 is coaxially connected to the rotating rod three 514, and the worm wheel three 515 is close to the second support frame 9; the worm gear three 516 is coaxially connected to the rotating rod two 512, and the worm gear three 516 meshes with the worm wheel three 515.

[0028] Start the driving motor 509. The driving motor 509 drives the rotating rod one 508 to rotate. The worm gear one 510 rotates synchronously with the rotating rod one 508. The worm gear one 510 drives the worm wheel one 504 to rotate. The worm wheel one 504 drives the short swing bar 505 to swing. Under the action of the connecting bar 506, the long swing bar 503 can be made to swing reciprocally, so that the rotating rod one 508 can be made to swing, and further the dust suction cover 3 can be made to swing. The swing of the dust suction cover 3 can suck dust from all directions, further expanding the dust suction area and further improving the smoke and dust collection effect.

[0029] In addition, while the worm wheel one 504 is rotating, it will drive the worm gear two 511 to rotate. The worm gear two 511 will drive the worm wheel two 513 to rotate. The worm wheel two 513 will drive the rotating rod two 512 to rotate. The rotating rod two 512 will drive the worm gear three 516 to rotate synchronously. The worm gear three 516 will drive the worm wheel three 515 to rotate. The worm wheel three 515 will drive the rotating rod three 514 to rotate, and further drive the negative pressure fan 7 to rotate. Thus, it is realized that using one driving motor 509 can not only drive the dust suction fan 4 to rotate, but also drive the dust suction cover 3 to swing and drive the negative pressure fan 7 in the telescopic hose 6 to rotate. The rotation of the negative pressure fan 7 can make the inside of the telescopic hose 6 in a state of high-speed air transfer, and further accelerate the flow of smoke and dust.

[0030] The function principle of the present application can be described through the following operation mode:

[0031] The operator can use the telescopic rod 200 to push the vertical swing rod 1 upwards, which can cause the first telescopic component 23 and the second telescopic component 24 in the telescopic frame 2 to expand. Through the expansion of the telescopic frame 2, each dust suction hood 3 can be expanded and closed. During the expansion of the first telescopic component 23 and the second telescopic component 24, the same expansion distance is always maintained between the dust suction hoods 3, so that the expanded dust suction hoods 3 are evenly distributed. Moreover, by using the driving mechanism 5, while the dust suction hood 3 swings, it can also drive the negative pressure fan 7 in the telescopic hose 6 to rotate. Therefore, not only can the dust suction area of the dust suction hood 3 be increased, but also the flow of smoke and dust in the telescopic hose 6 can be made faster, accelerating the dust collection efficiency.

[0032] The above is only the preferred specific implementation mode of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and its concept of the present application, makes equivalent replacements or changes, and should be covered by the protection scope of the present application.

Claims

1. A telescopic room welding fume collection and disposal device, comprising a fume purifier (1) installed outside the telescopic room (100) and used for purifying fumes. It is characterized in that: A telescopic frame (2) is arranged inside the telescopic room (100). The telescopic frame (2) includes a fixed seat (21) fixedly connected to the non-mobile end of the telescopic room (100), a plurality of horizontally arranged and parallel cross bars (22), a first telescopic assembly (23) and a second telescopic assembly (24) located on both sides of the fixed seat (21). The first telescopic assembly (23) and the second telescopic assembly (24) are both used to expand and combine each of the cross bars (22). Wherein, a dust suction hood (3) is arranged below each of the cross bars (22). A dust suction fan (4) is rotatably arranged in the dust suction hood (3). A driving mechanism (5) for driving the dust suction fan (4) is arranged on the cross bar (22). A telescopic hose (6) is connected between adjacent two dust suction hoods (3). The telescopic hose (6) at one end close to the fixed seat (21) is communicated with the dust suction port of the fume purifier (1). The first telescopic assembly (23) includes a first horizontal swing rod (231) horizontally swinging and hinged at one end to the fixed seat (21), and a second horizontal swing rod (232) horizontally swinging and hinged at the middle to one end of the cross bar (22). The ends of adjacent two second horizontal swing rods (232) are hinged to each other. The end of the first horizontal swing rod (231) away from the fixed seat (21) is hinged to the end of the second horizontal swing rod (232). The second telescopic assembly (24) includes an extension rod (241) horizontally fixedly connected to the side wall of the fixed seat (21), a first vertical swing rod (242) vertically swinging and hinged at one end to the end of the extension rod (241), and a second vertical swing rod (243) vertically swinging and hinged at the middle to the other end of the cross bar (22). The ends of adjacent two second vertical swing rods (243) are hinged to each other. The end of the first vertical swing rod (242) away from the extension rod (241) is hinged to the end of the second vertical swing rod (243). The driving mechanism (5) includes a transfer rod (501) vertically and fixedly connected to the bottom surface of the middle part of the cross bar (22), an inclined rod (502) inclined and fixedly connected to the bottom of the transfer rod (501), a long swing bar (503) hinged to the bottom of the transfer rod (501), a first worm gear (504) rotatably arranged at the bottom end of the long swing bar (503), a short swing bar (505) vertically swinging and coaxially connected to the first worm gear (504), a connecting bar (506) hinged between the short swing bar (505) and the inclined rod (502), a side plate frame (507) fixedly connected to the side wall of the long swing bar (503), a first rotating rod (508) parallel to the long swing bar (503) and rotatably arranged on the side plate frame (507), a driving motor (509) fixed on the side plate frame (507) and used to drive the first rotating rod (508) to rotate, a first worm (510) coaxially connected to the first rotating rod (508) and meshing with the first worm gear (504). The first rotating rod (508) extends into the dust suction hood (3) and is coaxially connected to the rotating shaft of the dust suction fan (4).

2. The telescopic house welding fume collection and disposal device according to claim 1, characterized in that, a vertically arranged telescopic rod (200) is rotatably arranged at the hinge joint of the first vertical swing rod (242) and the second vertical swing rod (243).

3. The telescopic house welding fume collection and disposal device according to claim 1, characterized in that, One end of the telescopic hose (6) close to the fume purifier (1) is communicated with a support pipe (61) at the connection with the dust suction hood (3). A negative pressure fan (7) is rotatably arranged in the support pipe (61). A first support frame (8) is fixedly connected to the top surface of the dust suction hood (3). The driving mechanism (5) further includes a second worm (511) rotatably arranged on the first support frame (8) and coaxially connected to the first worm gear (504), a second rotating rod (512) vertically arranged and rotatably arranged on the first support frame (8), a second worm gear (513) coaxially connected to the second rotating rod (512) and meshing with the second worm (511), a third rotating rod (514) coaxially connected to the rotating shaft of the negative pressure fan (7), a third worm gear (515) coaxially connected to the third rotating rod (514), a third worm (516) coaxially connected to the second rotating rod (512) and meshing with the third worm gear (515). A second support frame (9) is arranged in the dust suction hood (3). One end of the third rotating rod (514) away from the negative pressure fan (7) is rotatably arranged on the second support frame (9), and one end of the second rotating rod (512) away from the first support frame (8) is rotatably arranged on the second support frame (9).

4. The telescopic house welding fume collection and disposal device according to claim 3, characterized in that, A first sealing bearing (31) and a second sealing bearing (32) coaxially connected to the first rotating rod (508) and the second rotating rod (512) are respectively embedded in the top of the dust suction hood (3).

Citation Information

Patent Citations

  • Welding fume collecting and disposing device for telescopic room

    CN216175184U