A foldable welding slag suction and fire collection device and its usage method

Abstract

This invention discloses a foldable welding slag suction and fire-catching device and its usage method, relating to the field of building construction technology. It includes a foldable ring assembly and a negative pressure slag suction device. The foldable ring assembly consists of an upper folding ring, a lower folding ring, a fire-catching ceramic fiber cloth, a bottom tightening component, and a support mechanism. Each folding ring is formed by multiple folded arc rods connected by a detachable folding connecting assembly, allowing it to be disassembled into independent arc rod units for storage when folded. The fire-catching ceramic fiber cloth connects the upper and lower folding rings to form a fire-catching space. The bottom tightening component is used to tighten the lower opening to seal it with the steel component. The support mechanism includes an outer vertical telescopic rod and an upper radial telescopic rod. The outer vertical telescopic rod is supported between the upper and lower folding rings, and the end of the upper radial telescopic rod is equipped with a magnetic boot for adsorbing the surface of the steel component. The negative pressure slag suction device is sealed to the bottom tightening opening through a slag suction pipe, forming a downward negative pressure airflow within the fire-catching space to simultaneously adsorb welding slag and fumes. This invention combines the functions of fire reception and slag removal and dust removal. It has a small folding size, good portability, and flexible fixing method. It can adapt to various welding conditions such as vertical steel columns and horizontal steel beams. The structure is durable and reliable and can be reused repeatedly.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a foldable welding slag suction and fire catcher and its method of use. Background Technology

[0002] In steel structure welding operations, high-temperature molten slag and sparks can easily cause fires, burns to operators, and environmental pollution. Traditional fire-catching devices mostly use fixed metal trays, which can catch some molten slag, but have significant drawbacks: (1) Poor portability: Fixed pallets are bulky and heavy, making them difficult to carry at heights and in narrow spaces, increasing the labor intensity of workers. According to on-site statistics, welders need to spend an average of 15% more of their work time moving equipment; (2) Single function: The existing device can only passively receive molten slag and cannot effectively adsorb welding fumes, resulting in the industry pain point of PM2.5 concentration exceeding the standard in the work area; (3) Folding defects: Some improved folding fire-fighting devices (such as the utility model patent CN221185234U, which is an electric welding fire-fighting device) use a hinge structure, but they still occupy a large space after folding, and repeated opening and closing can easily lead to structural deformation, with an average service life of less than 6 months. (4) Low slag removal efficiency: After the molten slag cools, it sticks to the tray, and cleaning requires stopping the machine, which takes an average of 8-12 minutes each time, seriously affecting the construction progress. Some existing technologies have also tried to add a non-stick coating, but the coating is prone to ablation and failure under high temperature welding environment. Although the magnetic fire receiving tray improves the ease of installation, it has two major bottlenecks: it cannot dynamically adsorb molten slag, and the free fall of molten slag causes a splash radius of up to 1.2 meters, which still poses a safety hazard; the thin steel plate (usually ≤1mm) used to reduce weight is prone to warping and deformation at high temperature, and the failure temperature is only 450℃, which is far lower than the 1500℃ of molten slag.

[0003] The industry urgently needs a fire-fighting device that combines efficient slag suction, rapid folding, and high-temperature resistance, especially for high-altitude confined space operations such as wind turbine towers and bridge steel box girders. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems of traditional welding devices in the above-mentioned background art, such as poor portability, easy deformation of folding structure, inability to dynamically absorb welding fumes and large radius of molten slag spatter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A foldable welding slag suction and fire catcher and its method of use, comprising: A foldable ring assembly includes two coaxially arranged foldable rings, namely an upper foldable ring and a lower foldable ring. Each foldable ring is composed of multiple foldable arc rods and a foldable connecting assembly connecting adjacent foldable arc rods. The foldable connecting assembly detachably connects adjacent foldable arc rods so that the foldable ring can be folded up by disassembling the foldable connecting assembly. The fire-receiving asbestos cloth has its upper part connected to the upper folding ring and its lower part connected to the lower folding ring, forming a fire-receiving space between the upper folding ring and the lower folding ring; A bottom tightening component is provided below the lower folding ring to tighten the lower opening of the fire-resistant asbestos cloth extending below the lower folding ring, thereby forming a bottom tightening opening for tightening with the steel component; The support mechanism includes multiple telescopic rods and telescopic rod connectors; The slag suction device is sealed to the pre-set pipe nozzle on the bottom tightening port through a slag suction pipe, which is used to form a downward negative pressure airflow in the fire contact space, and at the same time adsorb welding slag and dust. The outer vertical telescopic rod is rotatably supported between the upper and lower folding rings via the telescopic rod connector to form a support structure for the fire-contact space; the upper radial telescopic rod is rotatably connected to the upper folding ring via the telescopic rod connector, and the other end is a free end, which is fixedly equipped with a magnetic shoe that is adapted to the surface of the steel component for magnetic adsorption to form a support and positioning.

[0006] Preferably, the outer vertical telescopic rod is supported by two sets of telescopic rod connectors. One set of telescopic rod connectors is circumferentially disposed on the lower surface of the upper folding ring, and the other set of telescopic rod connectors is circumferentially disposed on the upper surface of the lower folding ring. The two ends of the outer vertical telescopic rod are respectively hinged to the two sets of telescopic rod connectors. The upper radial telescopic rod is rotatably connected to the upper folding ring through a set of telescopic rod connectors. This set of telescopic rod connectors is circumferentially disposed on the inner circumference of the upper folding ring. Multiple magnetic rings are also slidably sleeved on each segment of the upper folding ring. The top surface of the magnetic ring is flat and is used to directly adsorb onto the lower surface of the component to be welded.

[0007] Preferably, the telescopic rod connector includes two oppositely arranged connecting plates, each connecting plate having a shaft hole, and a connecting shaft passing through the shaft holes of the two connecting plates, wherein the end of the telescopic rod is rotatably connected to the connecting shaft.

[0008] Preferably, each of the folding rings is formed by three folding arc rods of equal length detachably connected by three folding connecting assemblies. Each folding connecting assembly includes a folding connecting rod head and a folding connecting plate respectively fixed to the ends of two adjacent folding arc rods. Both the folding connecting rod head and the folding connecting plate are provided with screw holes, and the detachable connection is achieved by bolts and nuts.

[0009] Preferably, the bottom tightening assembly includes a tightening rope threaded through the lower edge of the fire-receiving asbestos cloth and a tightening ring sleeved on the tightening rope.

[0010] Preferably, a zipper is provided axially on the side wall of the fire-resistant asbestos cloth, with one end of the zipper extending to the bottom surface of the bottom tightening opening and the other end extending to the upper folding ring.

[0011] Preferably, the slag suction device includes a slag suction box, a slag collection box, a slag suction pipe, a blower, a support, an isolation grid, and electrical wires. A slag inlet hole is provided on the side wall of the slag suction box. One end of the slag suction pipe communicates with the interior of the slag suction box through the slag inlet hole. The isolation grid is fixedly installed inside the slag suction box, dividing the interior into an independent slag inlet chamber and a blower mounting chamber. The slag inlet chamber is connected to both the slag inlet hole and the slag collection box. The blower is fixedly installed in the blower mounting chamber via the support. An air outlet hole is provided on the side wall of the slag suction box corresponding to the blower mounting chamber. One end of the electrical wire is electrically connected to the blower, and the other end extends outside the slag suction box for external power supply.

[0012] Preferably, it includes the following steps: S1. Unfolding device: Take out the foldable ring assembly in the folded state, unfold the folded ring and tighten it through the folding connection assembly, extend the outer vertical telescopic rod to make the fire-receiving asbestos cloth form a tube shape, and pull up the zipper set on the side wall of the fire-receiving asbestos cloth, and connect the two ends of the slag suction pipe to the pipe nozzle on the side of the bottom tightening port and the slag inlet of the slag suction device respectively. S2. Installation and fixing: Select the fixing method according to the type of welded component, and fix the foldable ring assembly directly below weld c; S3. Slag suction operation: Start the slag suction device, adjust the fan speed according to the welding fume concentration, and then carry out the welding operation. The molten slag and fumes generated during welding are sucked into the slag suction device under negative pressure. S4. Cleaning and Collection: After welding is completed, turn off the slag suction device, pull out the slag collection box and pour out the collected welding slag; S5. Folding and Storage: Disassemble the suction tube, unzip the zipper, disassemble the folding connection component, fold the folding ring radially into a flat shape, and then organize and store it.

[0013] Preferably, in step S2, any one of the following fixing methods is selected according to the type of welded component: When the welded component is a vertical component, an internal support adsorption type fixation is adopted: unzip the zipper, wrap the fire-resistant asbestos cloth around the steel component b from the side and then zip it up; rotate the upper radial telescopic rod to the horizontal position, adjust the length of the telescopic rod so that the magnetic shoe at the end is firmly adsorbed on the side wall of the vertical component; finally tighten the bottom tightening component to seal the bottom tightening opening to the surface of the steel component b. When the welded component is horizontal or inclined, a direct adsorption method is used for fixing: the magnetic ring 114 on the upper folding ring is directly adsorbed onto the lower surface of the component, or the upper radial telescopic rod is rotated to a vertical state and adsorbed onto the lower surface of the component.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) Good portability and durable and reliable folding structure: By setting the folding ring as a structure that combines multi-segment folding arc rods with detachable folding connection components, the folding connection at the zipper can be unscrewed to fold and bind the ring body for storage when folding. The folded size is small and easier to carry.

[0015] (2) The fixing method is flexible and diverse, adapting to different working conditions: By setting the outer vertical telescopic rod and the upper radial telescopic rod, the outer vertical telescopic rod can support the welding space, and the magnetic shoe at the end of the upper radial telescopic rod can be attracted to the surface of the steel component to form a positioning support; at the same time, the magnetic ring sleeved on the upper folding ring can be directly attracted to the lower surface of the horizontal or inclined component, so that this device can be used for welding welding of vertical steel components, as well as welding operations of horizontal steel beams and overhead welding and other different postures, and the installation and arrangement are flexible and convenient.

[0016] (3) It has both fire-receiving and slag-removing functions, and is safe and environmentally friendly: By setting up a slag suction device and sealing it with the bottom tightening port, a downward negative pressure airflow is formed in the fire-receiving space. The high-temperature molten slag and dust generated by welding can be simultaneously sucked into the slag suction box for collection and treatment. It not only receives the splashed molten slag, but also effectively reduces the harm of welding fumes to the environment and operators, and improves the image of civilized construction on site.

[0017] (4) Reusable and economical: The device adopts a modular structure design that is detachable and foldable, making it easy to install and disassemble, and can be reused, thus reducing construction costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of a foldable slag suction and fire-catching device; Figure 2 This is a schematic cross-sectional view of the foldable ring assembly; Figure 3 This is a schematic cross-sectional view of the slag suction device; Figure 4 This is a cross-sectional view of the foldable slag suction and fire-catching device (AA). Figure 5 This is a schematic diagram of the upper folding ring of the folding ring; Figure 6 This is a schematic diagram of the lower folding ring of the folding ring; Figure 7 This is a schematic diagram of the folding connection component; Figure 8 This is a cross-sectional view of the folding connection component; Figure 9 This is a schematic diagram of another implementation of the folding connection component; Figure 10 .Cross-sectional view of the folded ring BB; Figure 11 This is the implementation method of the foldable slag suction and fire-catching device; Figure 12 This is a cross-sectional view of the foldable slag suction and fire-fighting device.

[0020] Drawing number explanation: a. Foldable slag suction and fire catcher; b. Steel components; c. Welds; d. Steel beams; 2. Sludge suction device; 11. Folding ring; 12. Bottom tightening assembly; 13. Telescopic rod; 14. Magnetic boot; 15. Fire-resistant asbestos cloth; 16. Bottom tightening opening; 17. Zipper; 111. Folding arc rod; 112. Folding connecting assembly; 113. Telescopic rod connector; 114. Magnetic ring; 121. Tighten the rope; 122. Tighten the loop; 1121. Folding connecting rod head; 1122. Folding connecting plate; 1123. Screw hole; 1124. Bolt; 1125. Nut; 1131. Connecting plate; 1132. Connecting shaft; 1133. Shaft hole; 21. Slag suction box; 22. Slag suction pipe; 23. Fan; 24. Support frame; 25. Isolation fence; 26. Air outlet; 27. Slag inlet; 28. Slag collection box; 29. ​​Wire. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] The following description is provided to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art. The basic principles of the invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0023] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this invention and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this invention.

[0024] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0025] Example 1 Please see Figures 1-12 A foldable welding slag suction and fire catcher is disclosed, which mainly consists of two parts: a foldable ring assembly and a slag suction device 2. The foldable ring assembly includes a foldable ring 11 as a skeleton, a fire-catching asbestos cloth 15 forming the hopper, a bottom tightening assembly 12, and a support mechanism. The foldable ring 11 has a coaxial upper foldable ring and a lower foldable ring. Each foldable ring 11 is composed of multiple folded arc rods 111 and folding connecting assemblies 112 for connecting adjacent folded arc rods 111. In this embodiment, each foldable ring 11 is preferably composed of three folded arc rods 111 of equal length, which are detachably connected to form a complete ring through three folding connecting assemblies 112. The three-segment equal division structure allows the arc rods to be neatly stacked after folding, resulting in the most compact storage form.

[0026] Please see Figure 7 and Figure 8The folding connection assembly 112 includes a folding connecting rod head 1121 and a folding connecting plate 1122. The folding connecting rod head 1121 is fixed to the ends of adjacent folding arc rods 111 through the cooperation of screw holes 1123, bolts 1124, and nuts 1125. The folding connecting plate 1122 is fixed to the middle of the folding connecting rod head 1121 on one section of the folding arc rod 111, and the folding connecting plate 1122 is fixed to both sides of the end face of the folding connecting rod head 1121 on the corresponding other section of the folding arc rod 111, so that the folding connecting plate 1122 between the two adjacent sections of the folding arc rod 111 is shaped as follows: It forms a rotatable folding mechanism. Corresponding screw holes 1123 are opened at corresponding positions of the two folding connecting plates 1122, and the rotatable connection is achieved by bolts 1124 and nuts 1125. When it is necessary to fold and store, simply unscrew the nuts 1125 on the folding connecting components 112 on the same side (zipper side) of the two folding rings 11 and pull out the bolts 1124. This will separate the folding connecting plates 1122 on the adjacent folding arc rods 111 from each other, loosen the ring frame into three foldable arc rods, and thus flatten the entire foldable ring assembly into a very small flat shape.

[0027] Another folding connection component 112, please refer to Figure 9 The folding connecting rod head 1121 is fixed to the ends of adjacent folding arc rods 111. The upper end of the folding connecting rod head 1121 on one section of the folding arc rod 111 is fixed with a folding connecting plate 1122, and the lower end of the folding connecting rod head 1121 on the other section of the folding arc rod 111 is fixed with a folding connecting plate 1122. The two folding connecting plates 1122 are fitted together and are detachably and rigidly fastened by bolts 1124 and nuts 1125.

[0028] The fire-resistant asbestos cloth 15 is made of high-temperature resistant and flame-retardant ceramic fiber asbestos cloth, which has good flexibility. The upper edge of the fire-resistant asbestos cloth 15 is sewn onto the upper folding ring or fixedly connected by a high-temperature resistant hook and loop fastener, and the lower edge is connected to the lower folding ring in the same way, thereby opening up a cylindrical fire-resistant space between the upper and lower folding rings. The lower part of the fire-resistant asbestos cloth 15 extends downward beyond the lower folding ring by a certain length, forming a flexible lower opening. Preferably, a high-strength fireproof zipper 17 is provided along the axial length of the side wall of the fire-resistant asbestos cloth 15. The zipper teeth of the zipper 17 are made of metal, and the cloth tape is made of ceramic fiber cloth tape to meet the requirements of high temperature resistance and flame retardancy in welding operation environments. The cloth tape of the zipper 17 is sewn and fixed to the inner side of the open edge of the fire-resistant asbestos cloth 15 by high-temperature resistant stitching to form an overlapping structure to enhance the connection strength and prevent tearing under stress. The top of the zipper 17 extends to the upper folding ring, and the bottom extends to the bottom edge of the bottom tightening opening 16. In a preferred embodiment, a fireproof shielding strip is sewn and fixed along the entire length of the zipper 17 on the inner wall of the fire-resistant asbestos cloth 15; this is not specifically shown in this embodiment. The fireproof shielding strip is made of the same high-temperature resistant material as the fire-resistant asbestos cloth 15. One side is sewn and fixed to the inner wall of the fire-resistant asbestos cloth 15 on one side of the zipper 17, while the other side is a free edge, naturally covering the inner side of the zipper 17 with its own flexibility, forming a physical barrier to prevent high-temperature molten slag from directly impacting the zipper 17 during welding. When it is necessary to open or close the zipper 17, the fireproof shielding strip can be manually opened. During operation, pulling open the zipper 17 allows the fire-resistant asbestos cloth 15 to be opened laterally, directly wrapping around the steel component to be welded, without needing to be slipped on from the top of the steel component. In designs without a zipper, the device can also be slipped onto the end of the steel component by loosening the bottom tightening assembly.

[0029] The bottom tightening assembly 12 is used to tighten the lower opening to form a bottom tightening opening 16 for clamping or connecting the suction pipe 22 to the steel component b. See also... Figure 2 The bottom tightening assembly 12 includes a tightening rope 121 threaded inside the rolled edge of the bottom of the fire-receiving asbestos cloth 15, and a spring-loaded tightening ring 122 fitted onto the tightening rope 121. By tightening the tightening rope 121 and locking the tightening ring 122, the bottom of the asbestos cloth can be tightly wrapped around the surface of the steel component b or sealed to the joint of the slag suction pipe 22.

[0030] Please see Figure 5 and Figure 6To adapt to the fixing requirements of different welded components, this invention also provides a multifunctional support and adsorption positioning structure. Specifically, it includes multiple telescopic rods 13, telescopic rod connectors 113, magnetic boots 14, and magnetic rings 114. Each telescopic rod connector 113 includes two relatively parallel connecting plates 1131, with shaft holes 1133 on the connecting plates 1131, through which a connecting shaft 1132 passes. The end of the telescopic rod 13 is fitted onto the connecting shaft 1132 and can rotate flexibly around it.

[0031] Please see Figure 1 , Figure 4 , Figure 5 and Figure 6 The telescopic rods 13 in the support mechanism are divided into two groups: outer vertical telescopic rods and upper radial telescopic rods. The outer vertical telescopic rods 13 are located outside the fire-receiving space and are evenly distributed along the circumference; in this embodiment, 4 is used as an example. They are supported between the upper and lower folding rings by two sets of telescopic rod connectors 113. One set of telescopic rod connectors 113 is circumferentially fixed to the lower surface of the upper folding ring, and the other set is fixed to the upper surface of the lower folding ring. The two ends of each outer vertical telescopic rod 13 can be hinged to the connecting shafts 1132 of the corresponding upper and lower telescopic rod connectors 113. By adjusting and locking the length of the outer vertical telescopic rods 13, the distance between the upper and lower folding rings can be precisely controlled, while the fire-receiving asbestos cloth 15 is tightened from the outside to maintain the stable shape of the fire-receiving space and prevent it from collapsing when it is under negative pressure suction.

[0032] Multiple upper radial telescopic rods 13 are also provided, which are circumferentially fixed to the inner circumference of the upper folding ring through a set of telescopic rod connectors 113. One end of each upper radial telescopic rod 13 is rotatably connected to the connecting shaft 1132, allowing it to rotate between the vertical retracted state and the horizontal working state; the other end is a free end, on which a high-temperature resistant strong magnetic shoe 14 is fixedly installed. The adsorption surface of the magnetic shoe 14 is designed as an arc surface to fit well with the curved surface of the steel component.

[0033] In addition, multiple magnetic rings 114 are slidably fitted onto each segment of the folding arc rod 111 that constitutes the upper folding ring. The magnetic rings 114 are high-performance neodymium iron boron permanent magnets covered with a stainless steel protective shell, and their top surfaces are machined into flat adsorption planes. The magnetic rings 114 are pre-fitted into the folding arc rod 111 before being assembled with the folding connecting assembly 112, and their positions can be adjusted by sliding along the circumference of the arc rod 111, for direct adsorption onto horizontal or inclined steel components, such as the lower surface of a steel beam d.

[0034] Please see Figure 3 and Figure 11 The slag absorber 2 is used to create a downward negative pressure airflow within the welding space, simultaneously adsorbing welding slag and fumes. For example... Figure 5As shown, the slag suction device 2 includes a slag suction box 21, a slag collection box 28, a slag suction pipe 22, a blower 23, a support 24, an isolation grid 25, and an electric wire 29. A slag inlet hole 27 is provided on the side wall of the slag suction box 21, and one end of the slag suction pipe 22 communicates with the interior of the slag suction box 21 through the slag inlet hole 27. The isolation grid 25 is fixedly installed inside the slag suction box 21, dividing the interior of the slag suction box 21 into an independent slag inlet chamber and a blower mounting chamber. The slag inlet chamber is connected to the slag inlet hole 27 and the slag collection box 28, respectively. The blower 23 is fixedly installed in the blower mounting chamber through the support 24, and an air outlet hole 26 is provided on the side wall of the slag suction box 21 corresponding to the blower mounting chamber. One end of the electric wire 29 is electrically connected to the blower 23, and the other end extends out of the slag suction box 21 for external power supply.

[0035] During installation, one end of the slag suction pipe 22 is connected to the opening on the side of the bottom tightening port 16, and the other end is connected to the slag inlet hole 27 of the slag suction box 21, so that the welding space, the bottom tightening port 16, the slag suction pipe 22, and the slag inlet chamber are connected in sequence to form a complete negative pressure slag suction channel. After the blower 23 is started, a negative pressure is formed in the slag inlet chamber. The high-temperature molten slag and fumes generated by welding are sucked into the slag inlet chamber under the action of the downward airflow. The molten slag falls into the slag collection box 28 under the action of gravity, while the fumes are intercepted by the isolation grid 25. Clean air is discharged from the air outlet 26 through the blower 23, realizing the integrated collection and treatment of welding fumes and molten slag.

[0036] As a further optimization, a high-temperature resistant Teflon anti-stick coating can be applied to the inner surface of the fire-resistant asbestos cloth 15, or a replaceable aluminum silicate fiber paper can be pre-laid at the bottom to prevent the high-temperature molten slag from sticking to the cloth surface after cooling. Simultaneously, a HEPA high-efficiency filter can be installed at the air outlet of the fan 23 to deeply filter the fine dust in the exhaust airflow, ensuring that emissions meet standards.

[0037] Example 2 Further explanation in conjunction with Example 1, such as Figure 1-12 The structure shown in the invention, and the method of using the invention, includes the following steps: S1. Deployment device: Take out the foldable ring assembly in its flattened state, take three folded arc rods 111, and connect and lock them end to end with bolts 1124 and nuts 1125 to form upper and lower folded rings 11. If a zipper 17 is provided, pull it up to form the fire-resistant asbestos cloth 15 into a cylindrical shape; if no zipper is provided, the fire-resistant asbestos cloth 15 itself is a sewn cylindrical structure. Reliably connect and seal both ends of the slag suction pipe 22 to the connecting nozzle on the side of the bottom tightening port 16 and the slag inlet hole 27 of the slag suction device 2.

[0038] S2. Installation and Fixing: Depending on the type of component to be welded, one of the following fixing methods can be flexibly selected: For vertical components, such as the internal support of steel column b, the device is fixed by adsorption: if the device has a zipper 17, unzip it and pull it up by wrapping it around the steel column b from the side; if there is no zipper, insert the device into the free end of the steel column b. Rotate the upper telescopic rod 13 from its vertical retracted state to a horizontal state, extending the rod so that the magnetic shoe 14 at its end firmly adheres to the side wall of the steel column b, thereby providing stable lateral support for the upper folding ring and forming an annular airflow channel between the upper folding ring and the steel column b. Then, adjust the length of the telescopic rod 13 located on the outer vertical side so that the upper and lower folding rings are fully extended. Finally, tighten the bottom tightening rope 121 and lock it with the tightening ring 122, so that the bottom tightening opening 16 tightly wraps around and seals the steel column b.

[0039] Direct adsorption fixation of horizontal or inclined components: When welding the weld seam c of horizontal or inclined components such as the bottom of the steel beam d, the entire fire-receiving funnel 1 is placed directly below the weld seam c, and directly adsorbed onto the lower surface of the steel beam d using the plane of the magnetic ring 114 on the upper folding ring. At this time, the bottom tightening port 16 hangs down naturally, maintaining a sealed connection with the slag suction pipe 22, forming a suspended fire-receiving funnel.

[0040] S3. Slag Suction Operation: Start the fan 23 of the slag suction device 2. Adjust the fan 23 to a suitable speed according to the concentration of welding fumes using the speed control knob. At this time, a stable downward negative pressure airflow is formed from the welding space to the slag suction pipe 22 and then to the slag inlet chamber. Welding operation then begins. The high-temperature molten slag and fumes are captured and entrained by the negative pressure airflow the moment they fall, and are quickly sucked into the pipe.

[0041] S4. Cleaning and Collection: After welding is completed, turn off the blower 23. The welding slag in the slag inlet chamber is blocked by the isolation grid 25 and settles due to gravity, with most of it falling into the slag collection box 28 at the bottom. The operator can directly pull out the slag collection box 28 and quickly dump the collected welding slag. The entire process does not require stopping the machine or disassembling the main equipment.

[0042] S5. Folding and Storage: After operation, first disassemble the suction pipe 22. If there is a zipper 17, unzip it and loosen the tightening ring 122. Then loosen and remove the bolt 1124 in the folding connecting assembly 112 at the zipper, and rotate and stack the three folding arc rods 111 together. Then fold the soft fire-resistant asbestos cloth 15, and put it into the storage bag along with the telescopic rod 13. The entire device is significantly smaller in size after folding, making it easy to carry.

[0043] During welding, the fan 23 in the slag suction device 2 continuously draws in, creating a directional negative pressure flow field within the fire-receiving space enclosed by the fire-receiving asbestos cloth 15, pointing from the weld seam c towards the bottom tightening opening 16. The high-temperature molten slag just peeled off from the weld seam c has its splash kinetic energy rapidly dissipated and entrained by the downward airflow, preventing it from scattering disorderly. The splash radius is reduced from the traditional 1.2 meters to almost zero. At the same time, a large amount of PM2.5 and other toxic fumes generated during welding are also firmly bound by this airflow and sucked into the slag suction pipe 22, fundamentally solving the problem of unorganized fume emission. After the mixed airflow of molten slag and fumes enters the slag inlet chamber, the flow velocity drops sharply due to the sudden increase in cross-sectional area. The heavier welding slag falls into the slag collection box 28 under the obstruction of gravity and the isolation grid 25; the lighter fumes pass through the isolation grid 25 and are discharged from the exhaust port 26 by the fan 23.

[0044] This invention employs a detachable splicing ring structure consisting of a folding arc rod 111 and a folding connecting assembly 112. The folding connecting assembly 112 is hinged by bolts 1124, providing stable support during operation; after folding, the folding arc rod 111 can be completely stacked, with an extremely thin thickness, achieving ultimate portability.

[0045] Through a clever dual-position adsorption and support design, one device can adapt to all working conditions. The upper rotatable telescopic rod 13 with magnetic shoe 14 works in conjunction with the bottom tightening opening 16 to achieve triple fixation and sealing of vertical steel components, including internal support, circumferential adsorption, and bottom sealing, ensuring stable installation and reliable sealing. For horizontal steel beams, the planar adsorption of the magnetic ring 114 can be used directly for one-click hanging installation. This structural innovation allows one device to cover most welding scenarios on the construction site, eliminating the need for frequent tooling changes.

[0046] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. A foldable welding slag suction and fire catcher, characterized in that, include: The foldable ring assembly includes two coaxially arranged foldable rings (11), namely an upper foldable ring and a lower foldable ring. Each foldable ring (11) is composed of multiple foldable arc rods (111) and a foldable connecting assembly (112) connecting adjacent foldable arc rods (111). The foldable connecting assembly (112) is detachably connected to the adjacent foldable arc rods (111) so that the foldable ring (11) can be folded up by disassembling the foldable connecting assembly (112). Fire-receiving asbestos cloth (15), the upper part of which is sleeved and connected to the upper folding ring, and the lower part of which is sleeved and connected to the lower folding ring, forming a fire-receiving space between the upper folding ring and the lower folding ring; Bottom tightening assembly (12) is located below the lower folding ring and is used to tighten the lower opening of the fire-resistant asbestos cloth (15) extending below the lower folding ring to form a bottom tightening opening (16) for tightening with the steel component. The support mechanism includes multiple telescopic rods (13) and telescopic rod connectors (113). The slag suction device (2) is sealed to the pre-set pipe nozzle on the bottom tightening port (16) through the slag suction pipe (22) to form a downward negative pressure airflow in the fire contact space, while adsorbing welding slag and dust. The outer vertical telescopic rod (13) is hingedly supported between the upper and lower folding rings through the telescopic rod connector (113) to form a support structure for the fire-contacting space; the upper radial telescopic rod (13) is rotatably connected to the upper folding ring through the telescopic rod connector (113), and the other end is a free end. The free end is fixedly provided with a magnetic shoe (14), which is adapted to the surface of the steel component for magnetic adsorption to form a support and positioning.

2. The foldable welding slag suction and fire catcher according to claim 1, characterized in that, The outer vertical telescopic rod (13) is supported by two sets of telescopic rod connectors (113). One set of telescopic rod connectors (113) is circumferentially arranged on the lower surface of the upper folding ring, and the other set of telescopic rod connectors (113) is circumferentially arranged on the upper surface of the lower folding ring. The two ends of the outer vertical telescopic rod (13) are respectively hinged to the two sets of telescopic rod connectors (113). The upper radial telescopic rod (13) is rotatably connected to the upper folding ring through a set of telescopic rod connectors (113). This set of telescopic rod connectors (113) is circumferentially arranged on the inner circumference of the upper folding ring. Multiple magnetic rings (114) are also slidably sleeved on each folding arc rod (111) of the upper folding ring. The top surface of the magnetic ring (114) is a plane, which is used to directly adsorb onto the lower surface of the component to be welded.

3. A foldable welding slag suction and fire catcher according to claim 1, characterized in that, The telescopic rod connector (113) includes two oppositely arranged connecting plates (1131), each connecting plate (1131) having a shaft hole (1133), and a connecting shaft (1132) passing through the shaft hole (1133) of the two connecting plates (1131). The end of the telescopic rod (13) is rotatably connected to the connecting shaft (1132).

4. A foldable welding slag suction and fire catcher according to claim 1, characterized in that, Each of the folding rings (11) is formed by three folding arc rods (111) of equal length being detachably connected by three folding connecting assemblies (112). The folding connecting assembly (112) includes a folding connecting rod head (1121) and a folding connecting plate (1122) respectively fixed to the ends of two adjacent folding arc rods (111). The folding connecting rod head (1121) and the folding connecting plate (1122) are provided with screw holes (1123), and the detachable connection is achieved by bolts (1124) and nuts (1125).

5. A foldable welding slag suction and fire catcher according to claim 1, characterized in that, The bottom tightening assembly (12) includes a tightening rope (121) threaded through the lower edge of the fire-resistant asbestos cloth (15) and a tightening ring (122) sleeved on the tightening rope (121).

6. A foldable welding slag suction and fire catcher according to claim 1, characterized in that, A zipper (17) is provided axially on the side wall of the fire-resistant asbestos cloth (15). One end of the zipper (17) extends to the bottom surface of the bottom tightening opening (16), and the other end extends to the upper folding ring.

7. A foldable welding slag suction and fire catcher according to claim 1, characterized in that, The slag suction device (2) includes a slag suction box (21), a slag collection box (28), a slag suction pipe (22), a blower (23), a support (24), an isolation grid (25), and a wire (29). A slag inlet hole (27) is provided on the side wall of the slag suction box (21). One end of the slag suction pipe (22) communicates with the interior of the slag suction box (21) through the slag inlet hole (27). The isolation grid (25) is fixedly installed inside the slag suction box (21) to hold the slag suction box (21) closed. The interior is divided into an independent slag inlet chamber and a blower mounting chamber. The slag inlet chamber is connected to the slag inlet hole (27) and the slag collection box (28) respectively. The blower (23) is fixedly installed in the blower mounting chamber through the bracket (24). The slag suction box (21) has an air outlet (26) on the side wall corresponding to the blower mounting chamber. One end of the wire (29) is electrically connected to the blower (23), and the other end extends out of the slag suction box (21) for external power supply.

8. The method of using a foldable welding slag suction and fire catcher as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Unfolding device: Take out the foldable ring assembly in the folded state, unfold the folded ring (11) and tighten it through the folding connection assembly (112), pull up the zipper (17) provided on the side wall of the fire-resistant asbestos cloth (15) to make it into a cylindrical shape, and connect the two ends of the slag suction pipe (22) to the pipe nozzle on the side of the bottom tightening port (16) and the slag inlet of the slag suction device (2) respectively; S2. Installation and fixing: Select the fixing method according to the type of welded component, and fix the foldable ring group directly below the weld (c); S3. Slag suction operation: Start the slag suction device (2), adjust the speed of the fan (23) according to the welding fume concentration, and then carry out the welding operation. The molten slag and fumes generated by welding are sucked into the slag suction device (2) under negative pressure. S4. Cleaning and collection: After welding is completed, turn off the slag suction device (2), pull out the slag collection box (28) and pour out the collected welding slag; S5. Folding and storage: Disassemble the suction tube (22), unzip (17), disassemble the folding connection component (112), fold the folding ring (11) radially into a flat shape, and store it after tidying up.

9. The method of using a foldable welding slag suction and fire catcher according to claim 8, characterized in that, In step S2, any of the following fixing methods shall be selected according to the type of welded component: When the welded component is a vertical component, an internal support adsorption type fixation is adopted: pull open the zipper (17), wrap the fire-resistant asbestos cloth (15) around the steel component (b) from the side and then pull up the zipper (17); rotate the upper telescopic rod (13) to the horizontal position, adjust the length of the telescopic rod (13) so that the magnetic boot (14) at the end is firmly adsorbed on the side wall of the vertical component; finally tighten the bottom tightening component (12) so that the bottom tightening opening (16) is sealed to the surface of the steel component (b); When the welded component is horizontal or inclined, a direct adsorption method is used for fixing: the magnetic ring (114) on the upper folding ring is directly adsorbed onto the lower surface of the component.

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