Smoke exhaust device matched with submerged arc hardfacing machine
Technical Field
The invention relates to the technical field of surface processing equipment of flat metal workpieces, in particular to a smoke exhaust device matched with a submerged arc hardfacing machine.
Background
A submerged arc abrasion-resistant surfacing machine is a common flat metal working surface processing device and is mainly used for processing a surfacing layer on the surface of a flat metal workpiece. The structure of the presently used submerged arc hardfacing machine is as follows: the welding rod conveying device comprises a frame, be provided with the place the platform that is used for placing dull and stereotyped metal work piece in the frame, be provided with the first guide rail of trend around respectively in place the platform's the left and right sides, it indulges the support to slide on first guide rail, it can follow first guide rail back-and-forth movement to indulge the support of moving under first actuating mechanism's drive, be provided with the second guide rail of trend about indulging on moving the support, it is provided with the sideslip support to slide on the second guide rail, the sideslip support can be controlled along the second guide rail under second actuating mechanism's drive, be provided with the electric welding head on the sideslip support, and be used for carrying the welding rod to. When the device works, the welding rod conveying mechanism conveys the welding rods below the welding rod conveying mechanism to be melted and then is overlaid on the surface of the flat metal workpiece, and the welding rod conveying mechanism is synchronously moved forwards, backwards, leftwards and rightwards by the longitudinally-moving support and the transversely-moving support, so that a layer of overlaying layer with uniform thickness is processed on the surface of the flat metal workpiece placed on the placing platform. Because the electric welding head can produce a large amount of dense smoke containing welding slag particles in the process of surfacing the surface of the flat metal workpiece, if the dense smoke is not filtered and discharged in time, the air quality of an equipment workshop can be seriously influenced, and the health of workers is influenced. At present, dense smoke is generally discharged through a smoke exhaust device, and the structure of the smoke exhaust device used at present comprises: and a smoke exhaust hood on a transverse support of the fixed submerged arc hardfacing machine is arranged around the outside of an electric welding head of the submerged arc hardfacing machine, a smoke exhaust port is arranged on the side wall of the smoke exhaust hood and is communicated with an inlet of a filter through a smoke exhaust hose, and an outlet of the filter is communicated with an air inlet of a dust removal fan. The existing smoke exhaust device has the following defects: because the dense smoke contains a large amount of welding slag particles, the smoke exhaust hose is extremely easy to be blocked by the welding slag particles in the smoke exhaust process, and the use is inconvenient.
Disclosure of Invention
The invention aims to provide a smoke exhaust device which is convenient to use and not easy to block and is matched with a submerged arc hardfacing machine.
In order to achieve the purpose, the invention adopts the following technical scheme: a smoke exhaust device matched with a submerged arc wear-resistant surfacing welding machine comprises a smoke exhaust hood fixed on a transverse support of the submerged arc wear-resistant surfacing welding machine, the smoke exhaust hood is arranged outside an electric welding head of the submerged arc wear-resistant surfacing welding machine in a surrounding mode, a smoke exhaust port is formed in the side wall of the smoke exhaust hood and is communicated with an inlet of a horizontal smoke exhaust pipe in a butt joint mode, an outlet of the horizontal smoke exhaust pipe is communicated with an inlet of a vertical smoke exhaust pipe in a butt joint mode, a discharge port is formed in the bottom of the outlet end of the horizontal smoke exhaust pipe, a discharge hopper is arranged at the discharge port, a discharge valve is arranged at the outlet of the bottom of the discharge hopper, a welding slag scraping mechanism capable of scraping welding slag accumulated on the bottom wall of the inner portion of the horizontal smoke exhaust pipe to the discharge port is arranged on the horizontal smoke exhaust pipe, a plurality of partition plates which are arranged in a staggered mode are fixed on the inner wall of the vertical smoke exhaust pipe from bottom to top, the outlet of the filter is communicated with the air inlet of the dust removal fan.
Further, the smoke exhaust device matched with the submerged arc hardfacing machine is characterized in that: the structure of the welding slag scraping mechanism comprises: be fixed in the level and discharge fume the outside cylinder of pipe, the piston rod level of cylinder inwards stretches into the level and discharges fume the pipe and be fixed with the scraper that contacts the level and discharge fume the inside diapire of pipe, when the cylinder drives the scraper through the piston rod and discharges fume the inside diapire of pipe along the level and discharge fume the entrance point of pipe and move to the exit end of pipe is discharged fume to the level from the level, the scraper can be with piling up the welding slag that is detained on the inside diapire of pipe is discharged fume to the level and scrape and sweep.
Further, the smoke exhaust device matched with the submerged arc hardfacing machine is characterized in that: the smoke outlet of the smoke exhaust hood is provided with a baffle which inclines upwards towards the inside of the smoke exhaust hood.
Further, the smoke exhaust device matched with the submerged arc hardfacing machine is characterized in that: each baffle all is the downward sloping setting.
Through the implementation of the technical scheme, the invention has the beneficial effects that: can filter and clear away the welding slag granule in the flue gas to can in time clear away and be detained in the intraductal welding slag granule of discharging fume, thereby greatly reduce the probability that the pipe of discharging fume is blockked up, it is more convenient to use.
Drawings
FIG. 1 is a schematic view of the structural principle of a fume extractor of the submerged arc hardfacing machine of the invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
As shown in figure 1, the fume extractor matched with the submerged arc abrasion-resistant surfacing welding machine comprises a fume extractor 2 fixed on a transverse support 1 of the submerged arc abrasion-resistant surfacing welding machine, the fume extractor 2 is arranged around the outer part of an electric welding head 3 of the submerged arc abrasion-resistant surfacing welding machine, a fume exhaust port is arranged on the side wall of the fume extractor 2, the fume exhaust port of the fume extractor 2 is in butt joint communication with an inlet of a horizontal fume exhaust pipe 4, an outlet of the horizontal fume exhaust pipe 4 is in butt joint communication with an inlet of a vertical fume exhaust pipe 5, a discharge port 6 is arranged at the bottom of an outlet end of the horizontal fume exhaust pipe 4, a discharge hopper 7 is arranged at the discharge port 6, a discharge valve 8 is arranged at an outlet at the bottom of the discharge hopper 6, a welding slag scraping mechanism capable of scraping welding slag accumulated on the bottom wall inside the horizontal fume exhaust pipe 4 to the discharge port 6 is arranged on the horizontal fume exhaust pipe 4, a plurality of baffle plates 9 which are arranged in, each partition plate 9 enables the interior of the vertical smoke exhaust pipe 5 to form a zigzag gas flow channel, the outlet of the vertical smoke exhaust pipe 5 is communicated with the inlet of the filter 11 through a smoke exhaust hose 10, and the outlet of the filter 11 is communicated with the air inlet of the dust removal fan 12;
in the present embodiment, the structure of the slag scraping mechanism includes: the cylinder 13 is fixed outside the horizontal smoke exhaust pipe 4, a piston rod of the cylinder 13 horizontally extends inwards into the horizontal smoke exhaust pipe 4 and is fixed with a scraper 14 which is in contact with the inner bottom wall of the horizontal smoke exhaust pipe 4, when the cylinder 13 drives the scraper 14 to move from the inlet end of the horizontal smoke exhaust pipe 4 to the outlet end of the horizontal smoke exhaust pipe 4 along the inner bottom wall of the horizontal smoke exhaust pipe 4 through the piston rod, the scraper 14 can scrape and sweep welding slag accumulated on the inner bottom wall of the horizontal smoke exhaust pipe 4 to the discharge opening 6, and the welding slag scraping mechanism is simple in structure and convenient to install and maintain; in the embodiment, a baffle 15 which inclines upwards towards the inside of the exhaust hood 2 is arranged at the exhaust port of the exhaust hood 2, the baffle can preliminarily block and filter the smoke generated during welding of the electric welding head, and after the smoke is blocked by the baffle, part of large welding slag particles in the smoke can be blocked by the baffle and do not enter the exhaust pipe, so that the probability of blockage of the exhaust pipe is reduced; in the embodiment, each partition board 9 is arranged in a downward inclined manner, and as the flue gas passes through the tortuous gas flow channel in the vertical smoke exhaust pipe, and the flue gas continuously collides with the partition boards, welding slag particles in the flue gas are blocked by the partition boards and fall and are retained on the lower partition board, and the welding slag particles retained on the partition boards slide downwards along the partition boards to the discharge hopper below;
when the submerged arc hardfacing machine works, the dust removal fan 12 is started, under the action of negative pressure suction of the dust removal fan 12, smoke generated by an electric welding head 3 of the submerged arc hardfacing machine in the surfacing process is discharged after sequentially passing through a smoke exhaust port, a horizontal smoke exhaust pipe 4, a vertical smoke exhaust pipe 5, a smoke exhaust hose 10 and a filter 11, when the smoke rises through a baffle 15 at the smoke exhaust port, part of large welding slag particles in the smoke are preliminarily blocked by the baffle 15 and do not enter the horizontal smoke exhaust pipe 4, the smoke after being preliminarily blocked by the baffle 15 enters the vertical smoke exhaust pipe 5 through the horizontal smoke exhaust pipe 4, the smoke continuously collides with each partition plate 9 in the vertical smoke exhaust pipe 5 in the process of flowing along a tortuous gas flow passage in the vertical smoke exhaust pipe 5, and after the smoke collides with the partition plates 9, the welding slag particles in the smoke are blocked by the partition plates and fall on the lower partition plate to be retained, the welding slag particles retained on the partition plate 9 slide down along the partition plate 9 to the discharge hopper 7 below; meanwhile, the cylinder 13 is periodically started, so that the cylinder 13 drives the scraper 14 to move from the inlet end of the horizontal smoke exhaust pipe 4 to the outlet end of the horizontal smoke exhaust pipe 4 along the bottom wall inside the horizontal smoke exhaust pipe 4 through the piston rod, and the scraper 14 scrapes and sweeps welding slag accumulated on the bottom wall inside the horizontal smoke exhaust pipe 4 to the discharge opening 6 and then enters the discharge hopper 7 through the discharge opening 6; and when the discharge hopper 7 is filled with welding slag, opening the discharge valve 8 and discharging the welding slag.
The invention has the advantages that: can filter and clear away the welding slag granule in the flue gas to can in time clear away and be detained in the intraductal welding slag granule of discharging fume, thereby greatly reduce the probability that the pipe of discharging fume is blockked up, it is more convenient to use.