Novel welding fume collecting device

Abstract

The invention relates to a novel welding fume collecting device. The novel welding fume collecting device is reasonable in mechanical structure and high in practicability. The novel welding fume collecting device comprises a welding fume purifying device main machine, a fume collecting hood, a stand column, a horizontal arm, a box body and a front arm, the rear end of the horizontal arm is rotatably fixed to the stand column through a rotating piece, the rotating piece is driven by a first motor, the rear portion of the box body is hinged to the front end of the horizontal arm through a vertical shaft, and the front arm comprises an upper inclined rod, a lower inclined rod, a front base plate and a rear base plate. The components are hinged to form a parallelogram mechanism through horizontal short shafts, lugs are arranged at the lower end of the front portion of the box body and the middle of the upper inclined rod or the lower inclined rod respectively, an electric push rod is hinged between the two lugs through a horizontal short shaft, and the exhaust fume collecting hood is directly or indirectly fixed to the front base plate. The first motor, the second motor and the motor matched with the electric push rod are all provided with control modules. The novel welding fume collecting device is simple and reasonable in mechanical structure and has been popularized and applied to multiple coal mines to which the applicant belongs.

Description

Technical Field

[0001] This invention relates to a novel welding fume collection device. Background Technology

[0002] Chinese invention patent CN 115156228 B, authorized on June 27, 2023, discloses a welding fume collection system based on wireless positioning and navigation technology, belonging to the field of welding fume dust removal technology. It consists of a fume hood movement and opening / closing system, a weld point position tracking system, a fume collection system, and a fume treatment system. The fume hood movement and opening / closing system includes a rotating platform, on which the fume collection system and fume treatment system are mounted. The fume collection system includes a fume hood, and the weld point position tracking system includes a UWB base station, a UWB tag for the fume hood, a UWB tag on the wrist, and a backend system with positioning software installed. The server system includes a UWB tag on the inner surface of the fume hood. Welders wear UWB tags on their wrists. The backend server controls the fume hood's movement and opening / closing system, as well as the fume treatment and collection system. The invention features a tubular slide beam that fits over a spiral duct. Three rack-and-pinion tracks are installed on the outside of the slide beam. Each track has a movable frame, and each movable frame has a second geared motor and its driving drive wheel. The drive wheel meshes with the rack of its corresponding track. The three second geared motors drive the drive wheels on the movable frames, moving them up and down along the racks, thus controlling the opening and closing of the fume hood.

[0003] Whether the hood can be opened and closed is not important. Furthermore, without special design, it's difficult to clamp the flared hood closed using the three movable connecting rods described in this invention; in other words, the hood is difficult to truly close. In short, this invention is a typical example of using a complex structure to achieve a simple function, and is impractical.

[0004] Chinese invention patent CN108480356B, authorized on June 21, 2024, discloses a tracking welding dust collector comprising a sequentially connected air collection hood, a bag filter dust collector, a suction fan, a needle tip-arc charging device, an electrostatic dust collector, and an exhaust fan; a spherical adapter connects the air collection hood and the bag filter dust collector, the spherical adapter comprising a male spherical adapter connected to the tail end of the air collection hood and a female spherical adapter connected to the head end of the bag filter dust collector, the male spherical adapter being inserted into the female spherical adapter; the bag filter dust collector comprising a shell, sequentially connected air guide pipes disposed within the shell, a honeycomb filter bag, and a filter sheet; the needle tip-arc charging device having a built-in needle-shaped tungsten wire electrode. The tracking welding dust collector consists of a dust collection hood, a bag filter, a blower, a needle tip-arc charging device, a support arm, and a movable push rod, forming a triangular structure. However, this triangular structure is only fixed to the mounting base by an upper rotating bearing and an upper rotating shaft. Due to gravity, it cannot maintain balance, and its dust collection hood cannot be effectively kept near the welding torch (see its...). Figure 1 Furthermore, the centerlines of its lower rotating shaft and lower rotating bearing clearly coincide with the centerline of the support arm. In this case, both ends of its movable push rod are jammed and cannot extend or retract. In conclusion, the design of this invention is unreasonable and it cannot function properly.

[0005] There is an urgent need for a welding fume collection device with a reasonable mechanical structure design that is practical and truly implementable. Summary of the Invention

[0006] The technical problem to be solved by the present invention is how to overcome the above-mentioned defects of the prior art and provide a new type of welding fume collection device with reasonable mechanical structure and strong practicality.

[0007] To solve the above-mentioned technical problems, this novel welding fume collection device includes a main unit for welding fume purification and a fume hood. The main unit includes an exhaust fan, the inlet of which is connected to the fume hood via a corrugated flexible hose. The device is characterized by further including a column and a robotic arm. The robotic arm includes a horizontal arm, a housing, and a forearm. A rotating component is rotatably fixed on the column, and a driven gear is fixed at the lower part of the rotating component. This driven gear is equipped with a driving gear that meshes with it. The driving gear is driven by a first motor fixed to one side of the column. The rear of the housing is hinged to the front end of the horizontal arm via a vertical shaft. A positioning plate is fixed to the front end of the horizontal arm. The positioning plate has multiple positioning through holes distributed around the vertical shaft. Pin holes are opened at corresponding positions on the top of the housing, and the pin holes can be selectively aligned with the positioning through holes as needed. The forearm includes an upper inclined rod, a lower inclined rod, a front base plate, and a rear base plate. These components are hinged together by a horizontal short shaft to form a parallelogram mechanism. A vertical rotating shaft is fixed on the rear base plate and is hinged to the front of the housing through the vertical rotating shaft. The vertical rotating shaft is driven by a second motor installed inside the housing. Lugs are provided at the lower end of the front of the housing and in the middle of the upper or lower inclined rod. An electric push rod is hinged between the two lugs through a horizontal short shaft. The electric push rod is equipped with a third motor. The fume hood is directly or indirectly fixed to the front base plate. The first, second, and third motors are all servo motors or stepper motors with reduction mechanisms. Through manual or automatic control, the distance between the fume hood and the welding worker is controlled within a certain range so that the fume hood can effectively absorb welding fumes.

[0008] This design allows the first motor to drive the robotic arm and its fume hood to swing horizontally left and right as needed, controlling the horizontal distance between the fume hood and the welding worker within a certain range. The second motor can bend the forearm relative to the horizontal arm as needed, thereby controlling the distance between the column and the fume hood, and thus controlling the horizontal distance between the fume hood and the welding worker within a certain range. The third motor can raise or lower the upper or lower inclined rod of the parallelogram mechanism as needed, thereby controlling the distance between the column and the fume hood, and thus controlling the vertical distance between the fume hood and the welding worker within a certain range. Through the proper control of the first, second, and third motors, the distance between the fume hood and the welding worker can be effectively controlled within a certain range, enabling the fume hood to effectively remove welding fumes.

[0009] As an optimization, an intelligent tracking control circuit is also included. This circuit comprises a radar main controller, a UWB tag, and a UWB base station. The UWB tag is worn on the welder's wrist, and the UWB base station is fixed to a rotating component or horizontal arm. The first and second motors are connected to a three-phase power supply via their respective control modules. The third motor is connected to a 220V power supply via a DC forward / reverse remote control module and a rectifier. The radar main controller is connected to the first motor control module, the second motor control module, and the DC forward / reverse remote control module. This design allows the fume hood to automatically track the UWB tag in both horizontal and vertical directions. With the UWB tag worn on the welder's wrist, the fume hood remains close to the weld seam generating welding fumes during welding operations, while the welder holds the welding torch. This provides excellent fume removal and ease of use.

[0010] As an optimization, a flexible S-shaped steel bar is also fixed to the front base plate, and the smoke hood is fixed to the front end of the S-shaped steel bar. The corrugated hose between the front base plate and the smoke hood is fixed to the S-shaped steel bar. With this design, the distance between the smoke hood and the front base plate can be easily increased or decreased as needed by bending the S-shaped steel bar.

[0011] As an optimization, a wire feeding mechanism is also fixed on the forearm, and a lighting lamp is provided on the fume hood. This design facilitates continuous welding.

[0012] As an optimization, it also includes a welding machine equipped with remote control buttons and a voice control device. This design facilitates remote or voice control of the welding machine, allowing for adjustment of welding voltage and current.

[0013] This novel welding fume collection device has a simple and reasonable structure. Combined with UWB base stations and UWB tags, it can automatically track welding processes and has been promoted and applied in several coal mines owned by the applicant. Attached Figure Description

[0014] The novel welding fume collection device will be further described below with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural schematic diagram of one embodiment of the novel welding fume collection device; Figure 2 This is a top view of the horizontal arm, housing, and rear base plate of this novel welding fume collection device. Figure 3 yes Figure 1 The diagram shows the connection of the horizontal arm, which is deflected 45 degrees relative to the box. Figure 4 This is a bottom view of the horizontal arm, housing, and rear base plate of this novel welding fume collection device. Figure 5 yes Figure 4A schematic diagram showing the connection of the second motor driving the forearm to deflect 45 degrees relative to the housing; Figure 6 This is a circuit diagram of one embodiment of the novel welding fume collection device; Figure 7 This is a three-dimensional structural schematic diagram of Embodiment 2 of the novel welding fume collection device; Figure 8 This is a circuit diagram of the intelligent following control of the second embodiment of the novel welding fume collection device; Figure 9 This is an implementation diagram of Embodiment 2 of the novel welding fume collection device.

[0015] In the diagram: 1 is the main unit of the welding fume purification device; 2 is the fume hood; 3 is the corrugated hose; 4 is the column; 5 is the horizontal arm; 6 is the housing; 7 is the forearm; 71 is the upper inclined rod; 72 is the lower inclined rod; 73 is the front base plate; 74 is the rear base plate; 8 is the rotating component; 9 is the driven gear; 10 is the driving gear; 11 is the exhaust fan; 12 is the first motor; 13 is the vertical shaft; 14 is the positioning plate; 15 is the positioning through hole; 16 is the positioning pin; 17 is the horizontal short shaft; 18 is the vertical rotating shaft; 19 is the second motor; 20 is the lug; 21 is the electric push rod; 22 is... The following components are listed: 3rd motor, 23 S-shaped steel bar, 24 welding wire feeding mechanism, 25 lighting lamp, 26 first motor control module, 27 second motor control module, 28 DC forward and reverse remote control switch module, 29 welding machine, 30 welding machine electric knob controller, 301 output voltage adjustment knob, 302 output current adjustment knob, 31 radar main controller, 32 UWB tag, 33 UWB base station, 34 chain, 35 sprocket, 36 tension sprocket, 37 A1 voice control module, and 38 connector.

[0016] L1, L2, and L3 are three-phase power lines; N is the neutral line; RT1 is a fuse; REC1 and REC2 are rectifiers; KT1 is the forward button; KT2 is the reverse button; KA1 and KA1 are manual switches; KM1 is a normally open three-phase relay switch; QS is a four-gang knife switch; and U, V, W, S1, S2, COM, R, S, and T are terminals. Detailed Implementation

[0017] Implementation method one: such as Figure 1-6As shown, this novel welding fume collection device includes a welding fume purification device main unit 1 and a fume hood 2. The welding fume purification device main unit 1 includes an exhaust fan 11, the inlet of which is connected to the fume hood 2 via a corrugated hose 3. The device is characterized by further including a column 4 and a robotic arm. The robotic arm includes a horizontal arm 5, a housing 6, and a forearm 7. A rotating component 8 is rotatably fixed on the column 4, and a driven gear 9 is fixed at the lower part of the rotating component 8. The driven gear 9 is equipped with a driving gear 10 that meshes with it. The driving gear 10 is driven by a first motor 12 fixed to one side of the column 4. The rear of the housing 6 is hinged to the front end of the horizontal arm 5 via a vertical shaft 13. A positioning plate 14 is fixed to the front end of the horizontal arm 5. The positioning plate 14 has multiple positioning through holes 15 distributed around the vertical shaft. Pin holes are opened at corresponding positions on the top of the housing 6. The pin holes can be selectively aligned with the positioning through holes 15 as needed, and a positioning pin 1 passes through them. 6. The forearm 7 includes an upper inclined rod 71, a lower inclined rod 72, a front base plate 73, and a rear base plate 74. The above components are respectively hinged to form a parallelogram mechanism by a horizontal short shaft 17. A vertical rotating shaft 18 is fixed on the rear base plate 74 and is hinged to the front of the housing 6 by the vertical rotating shaft 18. The vertical rotating shaft 18 is driven by a second motor 19 installed in the housing 6. Lugs 20 are respectively provided at the lower end of the front of the housing 6 and in the middle of the upper inclined rod 71 or the lower inclined rod 72. An electric push rod 21 is hinged between the two lugs 20 by a horizontal short shaft 17. The electric push rod 21 is equipped with a third motor 22. The fume hood 2 is directly or indirectly fixed to the front base plate 73. The first motor 12, the second motor 19, and the third motor 22 are all servo motors or stepper motors with reduction mechanisms. By manual or automatic control, the distance between the fume hood 2 and the welding worker is controlled within a certain range so that the fume hood 2 can effectively absorb welding fumes.

[0018] A flexible S-shaped steel bar 23 is also fixed on the front base plate 73, and the fume hood 2 is fixed on the front end of the S-shaped steel bar 23. The corrugated hose 3 between the front base plate 73 and the fume hood 2 is fixed on the S-shaped steel bar 23. A welding wire feeding mechanism 24 is also fixed on the forearm 7. The fume hood 2 is equipped with a lighting lamp 25, which is connected to a 220V power supply line (i.e., one neutral wire and one live wire) through a manual switch KA2.

[0019] like Figure 1 , 6As shown, the first motor 12 and the second motor 19 are connected to the three-phase power line through the first motor control module 26 and the second motor control module 27, respectively. The third motor 22 is connected to the 220V power line (i.e., the neutral wire 1 and the live wire 2) through the DC forward and reverse remote control switch module 28 and the rectifier REC1. The first motor control module 26, the second motor control module 27 and the DC forward and reverse remote control switch module 28 are respectively equipped with a forward button KT1 and a reverse button KT2. Under the control of the manual switch KA1, the exhaust fan 11 is connected to the three-phase power line through the normally open three-phase relay switch KM1.

[0020] The novel welding fume collection device also includes an electric welding machine 29, which is equipped with an electric welding machine knob controller 30. The electric welding machine knob controller 30 is connected to a 220V power supply line through a rectifier REC2, and is equipped with an output voltage adjustment knob 301 and an output current adjustment knob 302.

[0021] When manually controlled, adjust the forward rotation button KT1 and the reverse rotation button KT2 of the first motor control module 26. The first motor 12 drives the horizontal arm 5 to rotate left or right as needed, so that the fume hood 2 is located near the workpiece to be welded.

[0022] Adjust the forward and reverse buttons KT1 and KT2 of the DC forward / reverse remote control module 28 as needed. The third motor 22 will drive the forearm 7 to press down or lift up, thereby adjusting the fume hood 2 to an appropriate height. Because the forearm 7 adopts a parallelogram mechanism, the horizontal posture of the fume hood 2 remains unchanged during the lifting and lowering process. Then, turn on the manual switch KA1, and connect the motor power supply of the exhaust fan 11 through the normally open three-phase relay switch KM1, and the exhaust fan 11 will start working. Then, adjust the output voltage adjustment knob 301 and the output current adjustment knob 302 as needed to start the welding operation.

[0023] like Figure 1 , 4 As shown in Figure 5, when needed, the forward rotation button KT1 and the reverse rotation button KT2 of the second motor control module 27 can be adjusted to rotate the forearm 7 and the smoke hood 2 around the vertical axis 18 at an appropriate angle, thereby adjusting the straight-line distance between the smoke hood 2 and the column 4 to an appropriate range. When lighting is needed, the light 25 on the smoke hood 2 can be turned on via KA2.

[0024] Implementation Method Two: (e.g.) Figure 7 , 8As shown, this novel welding fume collection device also includes an intelligent following control circuit, which comprises a radar main controller 31, a UWB tag 32, and a UWB base station 33. The UWB tag 32 is worn on the welder's wrist, and the UWB base station 33 is fixed to the rotating component 8 or the horizontal arm 5. The radar main controller 31 is connected to the first motor control module 26, the second motor control module 27, and the DC forward / reverse remote control switch module 28, respectively, as disclosed in CN 112826710 A.

[0025] UWB base station 33 has a base point and a horizontal reference line passing through the base point. UWB base station 33 detects the real-time spatial position of UWB tag 32. Radar main controller 31 calculates the angle between the line connecting the real-time spatial position of UWB tag 32 and the base point and the horizontal reference line, as well as the horizontal and vertical angles of their projections in the horizontal and vertical planes. When the horizontal angle exceeds a predetermined range, the first motor control module 26 of the first motor 12 controls the first motor 12 to drive the horizontal arm 5 to swing left or right, reducing the horizontal angle to the predetermined range. When the vertical angle exceeds the predetermined range, the DC forward / reverse remote control switch module 28 of the third motor 22 controls the third motor 22 to drive the fume hood 2 to rise or fall, reducing the vertical angle to the predetermined range. The remaining circuits and structures are as shown in Embodiment 1, omitted. The welding machine 29 is equipped with remote control buttons and a voice control device. 37 in the figure is the AI ​​voice control module; see CN 221658353 U, omitted.

[0026] Note: As Figure 9 As shown, this second implementation method has been promoted in Yangcun Coal Mine, which belongs to the applicant, and the effect is good.

Claims

1. A novel welding fume collecting device, comprising a welding fume purification device host and a fume collecting hood, the welding fume purification device host comprising an air extractor, an inlet of the air extractor being connected with the fume collecting hood through a corrugated hose, characterized in that: It also includes a column and a mechanical arm, the mechanical arm includes a horizontal arm, a box and a forearm, a rotating part is rotatably fixed on the column, a driven gear is fixed on the lower part of the rotating part, the driven gear is matched with a driving gear, the driving gear is driven by a first motor fixed on one side of the column, the rear part of the box is hinged on the front end of the horizontal arm through a vertical shaft, a positioning disc is fixed on the front end of the horizontal arm, a plurality of positioning through holes are opened on the positioning disc and distributed around the vertical shaft, a pin hole is opened on the corresponding position of the top of the box, the pin hole is aligned with the positioning through hole according to the need, and a positioning pin is jointly arranged, the forearm includes an upper inclined rod, a lower inclined rod, a front base plate and a rear base plate, the above-mentioned parts are respectively hinged into a parallelogram mechanism through horizontal short shafts, a vertical rotating shaft is fixed on the rear base plate and hinged on the front part of the box through the vertical rotating shaft, the vertical rotating shaft is driven by a second motor arranged in the box, lugs are arranged on the lower end of the front part of the box and the middle part of the upper inclined rod or the lower inclined rod, respectively, an electric push rod is hinged between the two lugs through a horizontal short shaft, the electric push rod is matched with a third motor, the fume hood is directly or indirectly fixed on the front base plate, the first motor, the second motor and the third motor are servo motors or stepping motors with a speed reduction mechanism, the distance between the fume hood and the welder is controlled within a certain range through manual control or automatic control, so that the fume hood can effectively absorb the welding fume.

2. The novel weld smoke collection device of claim 1, wherein: It also includes an intelligent following control circuit, the intelligent following control circuit includes a radar main controller, a UWB tag and a UWB base station, the UWB tag is worn on the wrist of the welder, the UWB base station is fixed on the rotating part or the horizontal arm, the first motor and the second motor are connected with three-phase power lines through a first motor control module and a second motor control module respectively, the third motor is connected with a 220V power line through a direct current forward and reverse rotation control switch module and a rectifier, the radar main controller is connected with the first motor control module, the second motor control module and the direct current forward and reverse rotation control switch module respectively.

3. The novel weld fume collection device of claim 1, wherein: A bendable S-shaped steel is also fixed on the front base plate, and the fume hood is fixed on the front end of the S-shaped steel.

4. The novel welding fume collection device according to claim 1 or 2 or 3, characterized in that: A welding wire feeding mechanism is also fixed on the forearm, and the fume hood is provided with a lighting lamp.

5. The novel weld smoke collection device of claim 4, wherein: It also includes a welding machine, the welding machine is matched with a remote control button and a sound control device.

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