A suspended welding fume collecting and processing device and method based on a traveling / semi-gantry structure

Abstract

The application discloses a kind of based on travelling crane / semi-gantry structure's suspension type welding fume collection and processing device, including air suction pipeline, variable diameter cover mouth, dust removal equipment and function module;The air suction pipeline is along the frame of travelling crane structure and / or semi-gantry structure arrangement;Variable diameter cover mouth is equipped with multiple, is distributed on the frame on the air suction pipeline in horizontal direction, and the air inlet of variable diameter cover mouth is vertically downward, to collect welding fume;Dust removal equipment is located on the frame, with the air suction pipeline communication, to process welding fume;The function module is to control the timing automatic start-stop of dust removal equipment.The application also discloses a kind of based on travelling crane / semi-gantry structure's suspension type welding fume collection and processing method.The application can effectively solve the capture problem of high-altitude suspended fume, with high space adaptability and mobility, to be compatible with existing travelling crane operation system and dynamic production layout in workshop.

Description

Technical Field

[0001] This invention relates to steel structure manufacturing technology, and more specifically, to a suspended welding fume collection and treatment device and method based on a crane / semi-gantry structure. Background Technology

[0002] In large steel structure manufacturing workshops, especially during the welding process of large components such as quay cranes, the effective collection of welding fumes has always faced significant technical bottlenecks. This is mainly reflected in two aspects: First, the dynamic diffusion and suspension of fumes after generation are difficult to capture. Welding work sites are frequently changing and isolated due to the large size and complex structure of the workpieces. Traditional mobile or suction arm-type source collection equipment, limited by their physical coverage and suction pipe length, struggles to achieve effective suction distance, especially in the central area of ​​the workshop, resulting in low collection efficiency. More importantly, a large amount of fumes that cannot be captured at the source continues to rise to a height of 8-11 meters above the workshop ceiling and remain suspended there for a long time, forming a "contamination layer" that existing collection technologies cannot reach. Second, the physical space of the workshop and production activities impose dual constraints on collection operations. The constant movement of large equipment such as overhead cranes within the workshop not only reduces the space available for deploying collection devices on the ground, but their movement trajectories also often conflict with the layout of fixed fume collection facilities, further restricting the flexibility and coverage of the collection system.

[0003] The persistent existence of these problems not only directly endangers the occupational health of workers but also causes fugitive emissions, failing to meet increasingly stringent environmental protection requirements. Currently, many domestic enterprises are actively promoting the construction of green factories, placing higher and more urgent demands on pollution control capabilities in the production process. Therefore, there is an urgent need to develop an innovative solution that can overcome the limitations of existing technologies. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the purpose of this invention is to provide a suspended welding fume collection and treatment device and method based on a crane / semi-gantry structure, which can effectively solve the problem of capturing high-altitude suspended fumes, while having high spatial adaptability and mobility to be compatible with the existing crane operation system and dynamic production layout in the workshop.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The first aspect of the present invention provides a suspended welding fume collection and treatment device based on a crane / semi-gantry structure, including a suction duct, a variable diameter hood, a dust removal device and a functional module;

[0007] The air intake duct is arranged along the frame of the traveling structure and / or the semi-gantry structure;

[0008] The variable diameter hood is provided with multiple openings, which are evenly distributed on the frame and on the horizontal air suction pipe. The air inlet of the variable diameter hood is vertically downward to collect welding fumes.

[0009] The dust removal equipment is mounted on the frame and connected to the suction duct to treat welding fumes.

[0010] The functional module is used to control the timed automatic start and stop of the dust removal equipment.

[0011] Preferably, the suction duct is a PVC pipe with a diameter of 300mm;

[0012] The air intake duct runs along the main beam of the frame, at the intersection of the main beam and the crossbeam, and is attached to the crossbeam. Reinforcement is installed every 2m, and flexible connections are used at the intersections.

[0013] Preferably, the variable diameter hood opening is provided with six openings, the variable diameter hood opening farthest from the dust removal equipment is the first variable diameter hood opening, and the first variable diameter hood opening is arranged in sequence towards the dust removal equipment as the second variable diameter hood opening, the third variable diameter hood opening, the fourth variable diameter hood opening, the fifth variable diameter hood opening, and the sixth variable diameter hood opening.

[0014] Preferably, the diameter of the first variable diameter cover opening is 140mm~150mm;

[0015] The diameter of the second variable diameter cover opening is 20mm~130mm;

[0016] The diameter of the third variable diameter cover opening is 100mm~110mm;

[0017] The diameter of the fourth variable diameter cover opening is 70mm~80mm;

[0018] The diameter of the fifth and sixth variable diameter cover openings is 50mm to 60mm.

[0019] Preferably, the air volume of the dust removal equipment is 6000 m³ / h. 3 / h;

[0020] The functional module adopts the Siemens PLC programming functional module.

[0021] Preferably, the filter cartridge in the dust removal equipment has a conical cross-section, and the diffusion angle of the conical shape is 70°±1°;

[0022] The back-flushing nozzle in the dust removal equipment is a diffusion nozzle;

[0023] The diffusion distance between the apex of the cone shape and the diffusion nozzle is 40mm ± 1mm.

[0024] The second aspect of this invention provides a suspended welding fume collection and treatment method based on a crane / semi-gantry structure, wherein the suspended welding fume collection and treatment device based on a crane / semi-gantry structure provided in the second aspect of this invention is used to perform the following steps:

[0025] S1. Confirm the surrounding working conditions in advance to ensure that there are no obstacles on the moving path of the vehicle's ground track;

[0026] S2, turn on the visual operating system on the purifier's electrical control box, and click on the display screen according to the welding operation time, and set the start / stop time according to the automatic start / stop control program of the suspended welding fume collection and treatment device preset by the functional module;

[0027] S3, check whether there are any signs of loosening or falling off at each fixing point of the air intake duct;

[0028] S4. When the dust removal equipment is turned on for the first time, the air volume is adjusted and reduced, and the vibration of the suction duct is observed during the movement of the crane / semi-gantry structure.

[0029] S5, the dust removal equipment is adjusted to the standard air volume. When the smoke and dust generated by the diffusion of heat sources from multiple welding points on the ground rises rapidly to a suspended layer of 8-10m, it is transported to the dust removal equipment through the variable diameter hood and the suction pipe before settling.

[0030] S6. After the welding operation is completed, the suspended welding fume collection and treatment device stops according to the automatic stop control program set in the functional module.

[0031] Preferably, during the operation of the suspended welding fume collection and treatment device, the functional module collects the voltage, temperature, and speed of the dust removal motor in the dust removal equipment in real time to determine whether the welding fume concentration in the workshop meets the standard and whether the dust removal equipment is operating normally.

[0032] Preferably, the dust removal motor in the dust removal equipment is started and operated according to the instructions of the automatic start control program preset by the functional module, or the manual start instruction on the touch screen on the purifier's electrical control box, or the manual start instruction of the control cabinet.

[0033] The dust removal motor in the dust removal equipment stops running when it receives an instruction from the automatic stop control program preset by the functional module, or when the functional module collects an abnormal signal.

[0034] This invention provides a suspended welding fume collection and treatment device and method based on a crane / semi-gantry structure, breaking through the traditional point-to-point and single-horizontal-plane dust collection mode. It innovates a welding fume collection and purification method of "crane attachment + multi-plane collection + suspended layer special purification". It adopts a variable diameter hood and segmented openings for the air duct system. By analyzing the airflow at the air intake and the air velocity in the air duct, the optimal hood diameter is used to achieve high efficiency and maximum dust collection. The functional modules can be used to allocate airflow to the welding station on demand and achieve efficient coverage according to the working conditions, time and spatial distribution characteristics, ensuring stable production in the workshop. The diffuser nozzles optimize airflow backflushing and filter cartridge cleaning. This invention has important engineering value and practical significance for achieving comprehensive and efficient treatment of welding fumes and helping enterprises achieve green production goals. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the suspended welding fume collection and treatment device of the present invention installed on a double-beam crane;

[0036] Figure 2 yes Figure 1 A top-down view;

[0037] Figure 3 yes Figure 1 A side view diagram;

[0038] Figure 4 This is a schematic diagram of the suspended welding fume collection and treatment device of the present invention installed on a semi-gantry;

[0039] Figure 5 yes Figure 4 A side view diagram;

[0040] Figure 6 This is a schematic diagram of the filter cartridge and backflushing nozzle in the suspended welding fume collection and treatment device of the present invention;

[0041] Figure 7 This is a timing diagram of the functional modules collecting dust removal motor parameters in the suspended welding fume collection and treatment method of the present invention;

[0042] Figure 8 This is a timing diagram of the automatic start / stop control program for the functional modules in the suspended welding fume collection and treatment method of the present invention. Detailed Implementation

[0043] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0044] Combination Figures 1 to 5As shown, the present invention provides a suspended welding fume collection and treatment device based on a crane / semi-gantry structure, including a suction duct 1, a variable diameter hood, a dust removal device 2, and functional modules.

[0045] In the overhead crane structure and / or semi-gantry structure, the frame provides reliable support and protection for the attachment of the air intake duct 1, and is a stable foundation for the normal operation of other components.

[0046] The air intake duct 1 is reinforced every 2m along the main beams, the junctions of the main beams and crossbeams, and the crossbeams of the frame in the gantry structure and / or semi-gantry structure. The junctions are made of flexible connections to accommodate the vibrations generated by the lateral movement of the gantry.

[0047] Multiple variable diameter hoods are set up and evenly distributed on the air intake duct 1 located on the crossbeam of the frame. The air inlet of the variable diameter hood is vertically downward (larger end) to efficiently collect suspended dust.

[0048] The dust collector 2 is installed on the ground track plane of the main beam of the frame in the traveling structure and / or on the platforms at both ends of the crossbeam of the frame in the semi-gantry structure. The dust collector 2 is connected to the suction pipe 1. The fumes are sucked into the dust collector 2 through the variable diameter hood and suction pipe 1. After entering the housing of the dust collector 2, they adhere to the surface of the filter cartridge. After being pulsed back-blown (intermittent high-pressure reverse-blowing compressed air) by the back-blowing nozzles (back-blowing nozzles are devices that spray compressed air into the filter cartridge; because it is in the opposite direction to the dust adsorption of the dust collector, it is generally called back-blowing.), the fumes fall into the ash drawer below, thus completing a series of functions such as welding fume collection, welding fume treatment, and discharge of clean air.

[0049] The functional modules utilize Siemens PLC programming modules. Based on ladder diagrams, a data processing logic module is written to handle data such as inverter voltage, temperature, and motor speed of the dust collector 2. Multiple instructions are used to convert raw values ​​read from storage into actual physical quantities. Simultaneously, a start / stop and status control logic program segment for the dust collector motor in the dust collector 2 is also written based on ladder diagrams. This program segment integrates automatic / manual switching modes and includes core logic for dust collector motor control such as fault interlocking (inverter fault, emergency stop) and HMI interactive control (start and stop commands). It is a core component of the operating software of the dust collector 2.

[0050] The air volume of dust removal equipment 2 is 6000m³. 3 / h.

[0051] The air intake duct 1 uses a PVC pipe with a diameter of 300mm. Due to the low friction of the PVC pipe, according to the air volume balance equation, dynamic pressure dominates the static pressure distribution.

[0052] There are six variable diameter hood openings. The variable diameter hood opening farthest from the dust removal equipment 2 is the first variable diameter hood opening 3. The variable diameter hood openings 4, 5, 6, 7, and 8 are arranged in sequence from the first variable diameter hood opening 3 toward the dust removal equipment 2.

[0053] To create negative pressure, the diameter of the first variable diameter hood opening 3 is 140mm~150mm; the diameter of the second variable diameter hood opening 4 is 20mm~130mm; the diameter of the third variable diameter hood opening 5 is 100mm~110mm; the diameter of the fourth variable diameter hood opening 6 is 70mm~80mm; and the diameters of the fifth variable diameter hood opening 7 and the sixth variable diameter hood opening 8 are both 50mm~60mm.

[0054] The functional modules adopt Siemens PLC programming modules and are equipped with a visual operating system to realize on-demand air volume allocation and efficient coverage of welding stations, ensuring stable production in the workshop.

[0055] Combination Figure 6 As shown, the traditional back-flushing nozzle in dust collector 2 is a cylindrical column. Due to the Venturi effect, the back-flushing gas ejected from the nozzle is separated by the boundary layer on the wall, forming a high-vortex flow at the top of the filter cartridge. According to Bernoulli's principle, the dynamic pressure at the center of the high-speed airflow increases significantly from the cone apex to the opening region of the filter cartridge, causing a sharp drop in static pressure and forming a low-pressure core area, resulting in a large negative pressure area and a dust removal "blind zone". Therefore, in this invention, the cross-section of the filter cartridge 201 in dust collector 2 is conical, with a diffusion angle of 70°±1°; the back-flushing nozzle 202 in dust collector 2 is a diffusion nozzle; and the diffusion distance between the apex 202 of the cone and the diffusion nozzle 203 is 40mm±1mm.

[0056] The backflush nozzle 202 uses a diffuser nozzle to increase the jet contact area, such as Figure 6 As shown, its working principle is based on the conservation of mass and momentum in fluid mechanics: the expansion of the cross section causes the jet velocity to decrease, which in turn forms a strong shear entrainment effect at the jet boundary. This shear layer can continuously entrain and entrain the surrounding air, forming a well-mixed flow field.

[0057] This flow field reconstruction has a synergistic effect with the cone apex of the filter cartridge 201: the airflow dispersed by the backflush nozzle 202 enters the opening area of ​​the filter cartridge 201 at a lower speed and a higher static pressure, thereby improving the blowing performance of the upper part of the filter cartridge 201.

[0058] Parameter optimization is crucial, and two extremes must be avoided: too small a diffusion angle results in weak shear entrainment; too large a diffusion angle causes the jet to break into an "umbrella-like flow" prematurely, leading to insufficient axial power. The diffusion distance (i.e., the vertical distance between the cone apex of filter cartridge 201 and the inflection point of the cylindrical wall of backflushing nozzle 202) must ensure that the jet diffuses sufficiently but does not attenuate excessively before reaching filter cartridge 201. Ultimately, a diffusion angle of 70° and a diffusion distance of 40mm were found to be the optimal balance.

[0059] In summary, traditional welding fume control methods involve using mobile welding fume collection equipment with its hood pointed directly at the welding point for point-to-point collection. In contrast, this invention's welding fume collection method is based on the gaseous transport patterns of welding fumes, moving from point to area. An attached suction device is installed on a traveling crane within the workshop, moving laterally with the crane to achieve mobile suction at a higher horizontal level. This is particularly effective for collecting fumes rising from the welding point due to heat sources and for fumes spreading beyond the welding point, all within a suspended layer of 8-11 meters and then drawing them into the attached duct. This invention can be used in conjunction with traditional mobile welding fume collection equipment to achieve comprehensive point-to-area management, preventing the unorganized spread of fumes from the workshop to the outside.

[0060] This invention also provides a suspended welding fume collection and treatment method based on a crane / semi-gantry structure, wherein the suspended welding fume collection and treatment device of this invention performs the following steps:

[0061] S1. Confirm the surrounding working conditions in advance to ensure that there are no obstacles on the moving path of the vehicle's ground track;

[0062] S2, turn on the visual operating system on the purifier's electrical control box, and click on the display screen according to the welding operation time, and set the start / stop time according to the automatic start / stop control program of the suspended welding fume collection and treatment device of this invention preset by the functional module;

[0063] S3, check whether there are any signs of loosening or falling off at each fixing point of the air intake duct 1, and whether there is any damage to the flexible connection duct at the corner of the main beam and cross beam;

[0064] S4. When the dust removal equipment 2 is turned on for the first time, the air volume is adjusted and reduced. The vibration of the suction duct 1 during the movement of the crane / semi-gantry structure is observed to ensure that the attachment structure has a stable fit in actual operation.

[0065] S5, the dust removal equipment 2 is adjusted to the standard air volume. When the smoke and dust generated by the diffusion of heat sources from multiple welding points on the ground rises rapidly to a suspended layer of 8-10m, it is transported to the dust removal equipment 2 through the variable diameter hood and suction pipe 1 before settling. It is collected and adhered by the filter cartridge 201. After the back-blowing nozzle 203 is turned on, the smoke and dust fall into the ash drawer.

[0066] S6. After the welding operation is completed, the suspended welding fume collection and treatment device of the present invention stops according to the automatic stop control program set in the functional module.

[0067] The dust removal motor of dust removal equipment 2 is speed-controlled by a frequency converter. During the operation of the suspended welding fume collection and treatment device of this invention, the functional module collects the voltage, temperature, and speed of the dust removal motor in dust removal equipment 2 in real time to determine whether the welding fume concentration in the workshop meets the standards and whether the dust removal equipment is operating normally. Combined with... Figure 7 As shown, in the first row, the functional module collects the operating voltage signal from the frequency converter to the dust collector motor in real time. After converting and processing the raw voltage data, it stores it in the internal register VD372 of the functional module. This data is simultaneously displayed on the field monitor, allowing operators and inspectors to intuitively view the equipment's operating voltage status. It can also be used for subsequent logic operations within the PLC, providing data support for equipment control. In the second row, the functional module collects the frequency converter's own operating temperature data. After performing logical operations on the temperature value, it stores the result in the register corresponding to the "Frequency Converter Temperature" label. By monitoring this temperature value in real time, potential overheating of the frequency converter can be detected promptly, preventing damage to the drive unit due to overheating, thus effectively protecting the equipment. In the third row, the functional module collects the real-time speed data of the dust collector motor and directly stores it in the register corresponding to the "Motor Speed" label. The system will compare the real-time value of the "Motor Speed" with the threshold value corresponding to the "Output Voltage" set in the program in real time, based on the on-site tobacco concentration and preset control requirements, to ensure that the motor speed meets the process control requirements for tobacco collection.

[0068] The functional modules primarily control the start / stop of the dust collector motor in dust collector equipment 2 and provide operational status prompts, ensuring safe and controllable operation of the dust collector motor and facilitating on-site operation and maintenance. Combined with... Figure 8As shown, the first line clearly defines the start-stop control conditions for the dust collector motor. The dust collector motor must meet one of three conditions to start operation: It starts operating according to the instructions of the preset automatic start control program of the functional module, or the manual start instruction on the touchscreen of the purifier's electrical control box, or the manual start instruction of the control cabinet; or it stops operating when the dust collector motor receives the instructions of the preset automatic stop control program of the functional module, or when the functional module collects an abnormal signal, to prevent the equipment failure from escalating or causing safety hazards. In the second line, when the dust collector 2 is operating normally, the functional module will issue a "motor start" control signal. This signal is used to drive the on-site indicator lights to illuminate and the audible and visual alarms to activate, intuitively indicating to operators and maintenance personnel that "the motor is running," facilitating real-time monitoring of the equipment's operating status and providing convenience for daily operation and maintenance. This functional module mainly realizes the start-stop control and operating status indication of the dust collector motor, ensuring the safe and controllable operation of the dust collector motor and facilitating on-site operation and maintenance.

[0069] Example 1

[0070] refer to Figures 1 to 3 As shown, this embodiment 1 provides a suspended welding fume collection and treatment device based on a crane / semi-gantry structure, including a suction duct 1, a variable diameter hood, a dust removal device 2, and functional modules.

[0071] The overhead crane structure is a double-beam overhead crane, whose frame provides reliable support and protection for the suction duct 1, and is a stable foundation for the normal operation of other components.

[0072] The air intake duct 1 runs along the main beam of the double-beam traveling frame, the junction of the main beam and the crossbeam, and the crossbeam. It is reinforced every 2m, and the junction is made of soft connection to adapt to the vibration generated by the lateral movement of the traveling duct.

[0073] Six variable diameter hoods are provided, evenly distributed on the air suction duct 1 located on the crossbeam of the frame, and the air inlets of the variable diameter hoods are vertically downward, aiming at the suspended dust for efficient collection; the variable diameter hood farthest from the dust removal equipment 2 is the first variable diameter hood 3, and the variable diameter hoods 4, 5, 6, 7, and 8 are respectively located in the direction of the dust removal equipment 2.

[0074] The dust removal equipment 2 is installed on the ground track plane of the main beam of the double beam crane frame. The dust removal equipment 2 is connected to the suction pipe 1. The fumes are sucked into the dust removal equipment 2 through the variable diameter hood and the suction pipe 1. After entering the housing of the dust removal equipment 2, they adhere to the surface of the filter cartridge. After being pulsed back-blown by the back-blowing nozzle, the fumes fall into the ash drawer below, thus completing a series of functions such as welding fume collection, welding fume treatment, and exhaust of clean air.

[0075] The functional modules utilize Siemens PLC programming modules. Based on ladder diagrams, a data processing logic module is written to handle data such as inverter voltage, temperature, and motor speed of the dust collector 2. Multiple instructions are used to convert raw values ​​read from storage into actual physical quantities. Simultaneously, a start / stop and status control logic program segment for the dust collector motor in the dust collector 2 is also written based on ladder diagrams. This program segment integrates automatic / manual switching modes and includes core logic for dust collector motor control such as fault interlocking (inverter fault, emergency stop) and HMI interactive control (start and stop commands). It is a core component of the operating software of the dust collector 2.

[0076] Example 2

[0077] refer to Figure 4 and Figure 5 As shown, this embodiment 2 provides a suspended welding fume collection and treatment device based on a crane / semi-gantry structure, including a suction duct 1, a variable diameter hood, a dust removal device 2, and functional modules.

[0078] In the semi-gantry structure, its frame provides reliable support and protection for the attachment of the air intake duct 1, and is a stable foundation for the normal operation of other components.

[0079] The air intake duct 1 runs along the main beam of the frame in the semi-gantry structure, the junction of the main beam and the crossbeam, and the attachment of the crossbeam. It is reinforced every 2m, and the junction is made of soft connection to adapt to the vibration generated by the lateral movement of the vehicle.

[0080] Six variable diameter hoods are provided, evenly distributed on the air suction duct 1 located on the crossbeam of the frame, and the air inlets of the variable diameter hoods are vertically downward, aiming at the suspended dust for efficient collection; the variable diameter hood farthest from the dust removal equipment 2 is the first variable diameter hood 3, and the variable diameter hoods 4, 5, 6, 7, and 8 are respectively located in the direction of the dust removal equipment 2.

[0081] The dust removal equipment 2 is installed on the platform at both ends of the crossbeam of the frame in the semi-gantry structure. The dust removal equipment 2 is connected to the suction pipe 1. The fumes are sucked into the dust removal equipment 2 through the variable diameter hood and the suction pipe 1. After entering the housing of the dust removal equipment 2, they adhere to the surface of the filter cartridge. After being pulsed back-blown by the back-blowing nozzle, the fumes fall into the ash drawer below, thus completing a series of functions such as welding fume collection, welding fume treatment, and exhaust of clean air.

[0082] The functional modules utilize Siemens PLC programming modules. Based on ladder diagrams, a data processing logic module is written to handle data such as inverter voltage, temperature, and motor speed of the dust collector 2. Multiple instructions are used to convert raw values ​​read from storage into actual physical quantities. Simultaneously, a start / stop and status control logic program segment for the dust collector motor in the dust collector 2 is also written based on ladder diagrams. This program segment integrates automatic / manual switching modes and includes core logic for dust collector motor control such as fault interlocking (inverter fault, emergency stop) and HMI interactive control (start and stop commands). It is a core component of the operating software of the dust collector 2.

[0083] Example 3

[0084] refer to Figures 1 to 5 As shown, this embodiment 3 provides a suspended welding fume collection and treatment device based on a crane / semi-gantry structure, including a suction duct 1, a variable diameter hood, a dust removal device 2, and functional modules.

[0085] A suspended welding fume collection and treatment device is installed on both the overhead crane structure and the semi-gantry structure. The overhead crane structure is a double-beam overhead crane.

[0086] In the double-beam crane and semi-gantry structure, the frame provides reliable support and protection for the suction duct 1, and is a stable foundation for the normal operation of other components.

[0087] The suction duct 1 runs along the main beams, the junctions of the main beams and crossbeams of the frame in the double-beam traveling crane and semi-gantry structure, and is reinforced every 2m. The junctions are made of soft connections to adapt to the vibrations generated by the lateral movement of the traveling crane.

[0088] Six variable diameter hoods are provided, evenly distributed on the air suction duct 1 located on the crossbeam of the frame, and the air inlets of the variable diameter hoods are vertically downward, aiming at the suspended dust for efficient collection; the variable diameter hood farthest from the dust removal equipment 2 is the first variable diameter hood 3, and the variable diameter hoods 4, 5, 6, 7, and 8 are respectively located in the direction of the dust removal equipment 2.

[0089] In the overhead crane structure, the dust removal device 2 is set on the ground track plane of the main beam of the frame. In the semi-gantry structure, the dust removal device 2 is set on the platforms at both ends of the crossbeam of the frame. The dust removal device 2 is connected to the suction pipe 1. The fumes are sucked into the dust removal device 2 through the variable diameter hood and the suction pipe 1. After entering the housing of the dust removal device 2, they adhere to the surface of the filter cartridge. After being pulsed back-blown by the back-blowing nozzle, the fumes fall into the ash drawer below, thus completing a series of functions such as welding fume collection, welding fume treatment, and exhaust of clean air.

[0090] The functional modules utilize Siemens PLC programming modules. Based on ladder diagrams, a data processing logic module is written to handle data such as inverter voltage, temperature, and motor speed of the dust collector 2. Multiple instructions are used to convert raw values ​​read from storage into actual physical quantities. Simultaneously, a start / stop and status control logic program segment for the dust collector motor in the dust collector 2 is also written based on ladder diagrams. This program segment integrates automatic / manual switching modes and includes core logic for dust collector motor control such as fault interlocking (inverter fault, emergency stop) and HMI interactive control (start and stop commands). It is a core component of the operating software of the dust collector 2.

[0091] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A suspended welding fume collection and treatment device based on a crane / semi-gantry structure, characterized in that: Includes air intake ducts, variable diameter hoods, dust removal equipment, and functional modules; The air intake duct is arranged along the frame of the traveling structure and / or the semi-gantry structure; The variable diameter hood is provided with multiple openings, which are evenly distributed on the frame and on the horizontal air suction pipe. The air inlet of the variable diameter hood is vertically downward to collect welding fumes. The dust removal equipment is mounted on the frame and connected to the suction duct to treat welding fumes. The functional module is used to control the timed automatic start and stop of the dust removal equipment.

2. The suspended welding fume collection and treatment device based on a crane / semi-gantry structure according to claim 1, characterized in that: The air intake duct is made of PVC pipe with a diameter of 300mm; The air intake duct runs along the main beam of the frame, at the intersection of the main beam and the crossbeam, and is attached to the crossbeam. Reinforcement is installed every 2m, and flexible connections are used at the intersections.

3. The suspended welding fume collection and treatment device based on a crane / semi-gantry structure according to claim 2, characterized in that: The variable diameter hood has six openings. The variable diameter hood farthest from the dust removal equipment is the first variable diameter hood. The variable diameter hood openings in sequence toward the dust removal equipment are the second, third, fourth, fifth, and sixth variable diameter hood openings.

4. The suspended welding fume collection and treatment device based on a crane / semi-gantry structure according to claim 3, characterized in that: The diameter of the first variable diameter cover opening is 140mm~150mm; The diameter of the second variable diameter cover opening is 20mm~130mm; The diameter of the third variable diameter cover opening is 100mm~110mm; The diameter of the fourth variable diameter cover opening is 70mm~80mm; The diameter of the fifth and sixth variable diameter cover openings is 50mm to 60mm.

5. The suspended welding fume collection and treatment device based on a crane / semi-gantry structure according to claim 1, characterized in that: The dust removal equipment has an air volume of 6000 m³ / h. 3 / h; The functional module adopts the Siemens PLC programming functional module.

6. The suspended welding fume collection and treatment device based on a crane / semi-gantry structure according to claim 5, characterized in that: The filter cartridge in the dust removal equipment has a conical cross-section, and the diffusion angle of the conical shape is 70°±1°. The back-flushing nozzle in the dust removal equipment is a diffusion nozzle; The diffusion distance between the apex of the cone shape and the diffusion nozzle is 40mm ± 1mm.

7. A method for collecting and treating suspended welding fumes based on a crane / semi-gantry structure, characterized in that, The following steps are performed using the suspended welding fume collection and treatment device based on a crane / semi-gantry structure as described in any one of claims 1-6: S1. Confirm the surrounding working conditions in advance to ensure that there are no obstacles on the moving path of the vehicle's ground track; S2, turn on the visual operating system on the purifier's electrical control box, and click on the display screen according to the welding operation time, and set the start / stop time according to the automatic start / stop control program of the suspended welding fume collection and treatment device preset by the functional module; S3, check whether there are any signs of loosening or falling off at each fixing point of the air intake duct; S4. When the dust removal equipment is turned on for the first time, the air volume is adjusted and reduced, and the vibration of the suction duct is observed during the movement of the crane / semi-gantry structure. S5, the dust removal equipment is adjusted to the standard air volume. When the smoke and dust generated by the diffusion of heat sources from multiple welding points on the ground rises rapidly to a suspended layer of 8-10m, it is transported to the dust removal equipment through the variable diameter hood and the suction pipe before settling. S6. After the welding operation is completed, the suspended welding fume collection and treatment device stops according to the automatic stop control program set in the functional module.

8. The suspended welding fume collection and treatment method based on a crane / semi-gantry structure according to claim 7, characterized in that: During the operation of the suspended welding fume collection and treatment device, the functional module collects the voltage, temperature, and speed of the dust removal motor in the dust removal equipment in real time to determine whether the welding fume concentration in the workshop meets the standard and whether the dust removal equipment is operating normally.

9. The suspended welding fume collection and treatment method based on a crane / semi-gantry structure according to claim 7, characterized in that: The dust removal motor in the dust removal equipment starts and runs according to the instructions of the preset automatic start control program of the functional module, or the manual start instruction on the touch screen on the purifier's electrical control box, or the manual start instruction of the control cabinet. The dust removal motor in the dust removal equipment stops running when it receives an instruction from the automatic stop control program preset by the functional module, or when the functional module collects an abnormal signal.

Images