Dust hood

Abstract

The invention provides a dust removal cover, and relates to the technical field of scrap steel cutting dust removal. According to the dust removal cover, first limiting switches at SQ2-SQ7 positions are sequentially matched with first collision rods, so that an automatic walking assembly can be sequentially and accurately stopped in three corresponding fixed-point cutting areas; meanwhile, when the suction hood stops at the position, a second collision rod can just enable a heavy hammer rod of the heavy hammer flap valve to move to the highest position so as to automatically open a valve plate, and then the suction hood is communicated with the public flue to be matched with an induced draft fan and a dust remover, so that flame cutting and efficient dust removal can be performed on a local area of a scrap steel stacking and cutting area; in addition, two first limiting switches at the positions of SQ1 and SQ8 can be matched with a first sinker bar to limit the extreme movement positions of the two sides of the suction cover, the triggering directions of the first limiting switches at the positions of SQ1, SQ2, SQ4 and SQ6 are opposite to the triggering directions of the first limiting switches at the positions of SQ3, SQ5, SQ7 and SQ8, and then the suction cover does reciprocating motion to return to the stop position again for steel slag discharging.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scrap steel cutting and dust removal, in particular to a dust removal cover. BACKGROUND

[0002] Currently, when scrap steel is cut in a steel plant, workers need to manually move to different scrap steel storage areas one by one and hold an oxygen lance to perform flame cutting, at which time the collection of cutting dust is required.

[0003] When collecting dust during the cutting of scrap steel, a mobile ventilation channel is used. The mobile ventilation channel has a ventilation channel body and a dust collection trolley. The ventilation channel body is connected to a dust removal pipeline. The dust collection trolley is located above the ventilation channel body and cooperates with a track at the top of the ventilation channel body. A belt is used to fully cover and seal the top of the ventilation channel. The belt is in a reverse U shape and passes through the dust collection trolley. A belt pressing roller is used to press the belt tightly to ensure the airtightness of the dust collection trolley during movement. The dust collection port of the dust collection trolley is connected to a dust removal cover. The dust discharge port of the dust collection trolley is connected to the inside of the ventilation channel body. Then, a dust suction fan connected to the dust removal pipeline is operated to generate negative pressure, which causes the dust collection trolley to suck the cutting dust into the ventilation channel body. The dust is finally discharged into the dust removal bag of the dust collector for purification to reduce the impact of cutting dust on the surrounding workshop environment.

[0004] However, in actual operation, the belt of the mobile ventilation channel is prone to wear and tear, which requires frequent maintenance and has a short service life. In addition, the structure of the mobile ventilation channel is complex and the cost is high. In summary, the dust removal process during the flame cutting of scrap steel needs to be improved. SUMMARY

[0005] The present application aims to solve the problems in the background art and proposes a dust removal cover.

[0006] The technical solution adopted by the present application to solve the technical problem is as follows: A dust removal cover includes a common flue, The rear end of the common flue arranged at a high position is provided with an induced draft fan, and the end of the common flue is connected to a dust collector; A plurality of sub-flues are connected to the common flue and are distributed at equal intervals; A weight-activated flap valve corresponds to each sub-flue and is connected thereto; An automatic walking assembly is located outside a scrap steel stacking and cutting area. A suction cover is connected to the automatic walking assembly and is located above the scrap steel stacking and cutting area. Eight first limit switches are arranged on one side of the track of the automatic walking assembly, and the first limit switches are electrically connected to the driving source of the automatic walking assembly. The internal contact trigger directions of the first limit switches at SQ1, SQ2, SQ4, and SQ6 are opposite to those of the first limit switches at SQ3, SQ5, SQ7, and SQ8. The first impact bar in the shape of an inverted isosceles trapezoid is arranged on the automatic walking assembly, and triggers one of the first limit switches at SQ2-SQ7 to stop the suction cover, and the end surface of the pipeline at the top of the suction cover is accurately connected with the bottom end surface of the hammer flap valve on one of the sub flues, the end surface of the pipeline top and the bottom end surface of the hammer flap valve are consistent in shape, and the first impact bar triggers the first limit switch at SQ1 / SQ8 to stop the suction cover and reach the farthest end position at the same time; The second impact bar in the shape of an isosceles trapezoid is welded on the suction cover through a plurality of connecting rods, and the second impact bar is in contact with the hammer rod of the hammer flap valve at the current docking working position after triggering one of the first limit switches at SQ2-SQ7 by the first impact bar, so that the valve plate is automatically fully opened to perform the dust removal operation of the current lower scrap steel pile cutting area; The remote controller is electrically connected with the driving source of the automatic walking assembly.

[0007] Further, each of the sub flues is provided with a second limit switch with the same trigger direction and cooperating with the hammer rod of the corresponding hammer flap valve, and the pipeline and the hammer flap valve are provided with a sealing assembly electrically connected with the second limit switch.

[0008] Further, the sealing assembly comprises a limit plate, a circular plate, an annular groove, an annular air bag, a perforation, an air nozzle, a conveying pipe, a bidirectional air pump and a timer. The limit plate is welded on the lower area of the outer wall of each hammer flap valve, and the hammer flap valve passes through the limit plate. The circular plate is welded on the upper area of the outer wall of the pipeline, and the pipeline passes through the circular plate, and the spacing between the circular plate and the limit plate is 1-1.5 cm. The annular groove is opened in the circular plate, and the annular air bag is arranged in the annular groove. The perforation passes through the annular groove and the circular plate in sequence, and the air nozzle communicating with the annular air bag is matched in the perforation. The conveying pipe is connected with the other end of the air nozzle away from the annular air bag, and the conveying pipe is connected with the bidirectional air pump fixed on the suction cover. The second limit switch, the timer and the bidirectional air pump are electrically connected to start the bidirectional air pump to supply air when the hammer rod of the hammer flap valve moves to the topmost end and continuously triggers the second limit switch for more than 5 seconds. The remote controller is electrically connected with the bidirectional air pump to manually trigger the annular air bag to deflate and then start the driving source of the automatic walking assembly.

[0009] Further, the outer layer of the annular air bag is made of PET polyester fiber reinforced substrate, and the inner layer of the annular air bag is provided with silicone rubber.

[0010] Further, the automatic walking assembly comprises a high side wall, a low side wall, a heat insulation wall, an I-beam, a track wheel, a mounting frame and a three-in-one speed reducer, The high side wall and the low side wall are respectively arranged on the left and right sides of the scrap steel stacking and cutting area, and the high side wall is higher than the low side wall. The heat insulation wall with a height of 700 mm is vertically arranged on the high side wall. Two I-beams are arranged along the length direction of the high side wall and the low side wall, and eight first limit switches are arranged on the I-beam of the high side wall. Two track wheels are respectively matched with the two I-beams. The track wheel is rotatably arranged in the mounting frame, and the mounting frame is connected with the suction cover. The three-in-one speed reducer is arranged on the mounting frame, and the three-in-one speed reducer is connected with the track wheel and electrically connected with the first limit switch and the remote controller. The first impact rod is fixedly arranged on the high side mounting frame.

[0011] Further, the suction cover is provided with a track cleaning assembly matched with the two I-beams, and the track cleaning assembly comprises a mounting plate, a reinforcing bar, a fastening plate and a fixing bolt, The mounting plate is symmetrically welded on the left and right sides of the suction cover mounting frame. The reinforcing bars in contact with the I-beams are in contact with the outer side of the mounting plate. The fastening plate is provided with a plurality of fixing bolts connected with the mounting plate to clamp and limit the reinforcing bars between the fastening plate and the mounting plate, and the position of the reinforcing bars can be adjusted after subsequent wear.

[0012] Further, high-temperature-resistant metal dust sealing curtains are symmetrically arranged on the front and rear sides of the suction cover.

[0013] Further, three groups of fixed-point cutting positions and one group of stop positions are arranged along the walking path of the suction cover, the heat insulation wall is located in the stop position area, and the ground of the scrap steel stacking and cutting area has a slope.

[0014] Further, the surfaces of the first impact rod and the second impact rod are provided with a high-temperature-resistant rubber layer.

[0015] Compared with the prior art, the present application has the following advantages: (1) The first limit switch at SQ2-SQ7 and the first impact rod of the application can make the automatic walking assembly stop accurately in the corresponding three fixed cutting areas in sequence, and at the same time, when the suction cover stops at the above positions, the second impact rod can just make the weight rod of the weight flap valve move to the highest position to automatically open the valve plate, then the suction cover is connected with the public flue, the induced draft fan and the dust collector cooperate to carry out flame cutting on the local area of the scrap steel stacking cutting area and high-efficiency dust removal, in addition, the two first limit switches at SQ1 and SQ8 can cooperate with the first impact rod to limit the limit movement position of the suction cover, the internal contact trigger direction of the first limit switches at SQ1, SQ2, SQ4 and SQ6 is opposite to that of the first limit switches at SQ3, SQ5, SQ7 and SQ8, so that the suction cover reciprocates to return to the stop position, then the subsequent unloading can be carried out, compared with the movable ventilation slot, the structure design of the application is simple and not easy to be damaged, so that the maintenance cycle is significantly prolonged, and the movement position of the dust removal cover is accurate, so that the dust removal process effect during the flame cutting of scrap steel is better and the design is ingenious, the cost is significantly reduced compared with the movable ventilation slot, and the comprehensive use effect is better; (2) When the suction cover moves from right to left and passes through SQ3, SQ5 and SQ7 to stop dust removal, the seal is started (the time of continuously triggering the second limit switch when passing through SQ2, SQ4 and SQ6 is less than 5S, so the seal is not started), and when the suction cover moves from left to right and passes through SQ6, SQ4 and SQ2 to stop dust removal, the seal is started (the time of continuously triggering the second limit switch when passing through SQ3, SQ5 and SQ7 is less than 5S, so the seal is not started), so that the valve plate is automatically opened by the second impact rod at the same time, and if the triggering time of the second limit switch by the weight rod exceeds 5 seconds, the sealing assembly is automatically started to reduce the probability of dust overflowing from the joint between the weight flap valve and the pipeline during the subsequent dust removal process.

[0016] (3) The application adopts high-low barrier wall design to limit the processing and placing area of scrap steel, and at the same time, the heat insulation barrier wall cooperates with the wheel loader and the slope of the scrap steel stacking and cutting area to automatically complete the excavation and unloading of the steel slag after cutting; (4) The track cleaning assembly is used to automatically push away the debris on the track while the automatic walking assembly is running, so as to avoid the probability of jamming between the subsequent I-beam and the track wheel, further ensure the accuracy of the movement position of the suction cover, and the tightness of the reinforcing steel bar can be adjusted by bolts and nuts after the reinforcing steel bar is consumed, so that the reinforcing steel bar falls to ensure the normal development of the subsequent pushing debris process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure schematic diagram of the application; Figure 2Schematic diagram of the installation of the high side retaining wall and the low side retaining wall; Figure 3 A schematic diagram of the installation of the first impact bar; Figure 4 Schematic diagram of the second impact bar installation; Figure 5 This is a schematic diagram of the installation of the first limit switch; Figure 6 for Figure 1 Enlarged view of section A (labeled A); Figure 7 for Figure 2 Enlarged view of section B (reference number B); Figure 8 This is a diagram showing the trajectory of the counterweight rod in a counterweight flap valve. Figure 9 This is a schematic diagram showing the cutting point and the stop point; Figure 10 A schematic diagram of the installation of the second limit switch; Figure 11 This is a schematic diagram of the installation of a ring-shaped airbag; Figure label: 1. Public flue; 2. Sub-flue; 3. Counterweight flap valve; 31. Counterweight rod; 32. Valve plate; 33. Limiting plate; 4. High side retaining wall; 5. Low side retaining wall; 6. Insulated retaining wall; 7. I-beam; 8. Track wheel; 9. Mounting bracket; 10. Three-in-one reducer; 11. Suction hood; 111. Pipeline; 12. First limit switch; 121. First impact rod; 13. Second impact rod; 14. High-temperature resistant metal dust curtain; 15. Track cleaning assembly; 151. Mounting plate; 152. Reinforcing bar; 153. Fastening plate; 154. Fixing bolt; 16. Second limit switch; 17. Circular plate; 18. Annular groove; 19. Annular airbag; 191. Air nozzle; 20. Conveying pipe; 21. Two-way air pump. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. The present invention will be further described with reference to the accompanying drawings and embodiments: like Figures 1 to 9 As shown, a dust collection hood includes a common flue 1. An induced draft fan is installed at the rear end of the elevated public flue 1, and the end of the public flue 1 is connected to a dust collector (neither the induced draft fan nor the dust collector is shown in the figure). Several sub-flues 2 are connected to a common flue 1 and are distributed at equal intervals; The counterweight flap valve 3 corresponds to and is connected to the sub-flue 2 one by one (the counterweight flap valve 3 is existing technology and will not be improved. Its structure includes a housing, a deflectable valve plate installed in the housing, and a counterweight rod that drives the valve plate to deflect). The counterweight flap valve (also known as a gravity flap valve or hammer-type airlock valve) is a mechanical valve that automatically opens and closes by relying on the weight of the material and the torque balance of the counterweight.

[0019] The automatic walking component is located outside the scrap steel stacking and cutting area. The suction hood 11 is connected to the automatic walking component and is located above the scrap steel stacking and cutting area. Eight first limit switches 12 are installed on one side of the automatic walking component's track and are electrically connected to the drive source of the automatic walking component. The triggering direction of the internal contacts of the first limit switches 12 at SQ1, SQ2, SQ4 and SQ6 is opposite to the triggering direction of the internal contacts of the first limit switches 12 at SQ3, SQ5, SQ7 and SQ8. An inverted first impact rod 121 with an isosceles trapezoidal main body is mounted on the automatic walking assembly. The first impact rod 121 triggers one of the first limit switches 12 at SQ2-SQ7 to stop the suction hood 11. The end face of the pipe 111 connecting the top of the suction hood 11 is accurately aligned with the bottom face of the counterweight flap valve 3 on one of the sub-flues 2. The top face of the pipe 111 and the bottom face of the counterweight flap valve 3 have the same shape. When the first impact rod 121 triggers the first limit switch 12 at SQ1 / SQ8, the suction hood 11 stops and simultaneously reaches the farthest position. The second impact rod 13, which is an isosceles trapezoid in shape, is welded to the suction hood 11 by several connecting rods. After the first impact rod 121 triggers one of the first limit switches 12 at SQ2-SQ7, the second impact rod 13 contacts the hammer rod 31 of the hammer flap valve 3 at the current docking position, so that the valve plate 32 is automatically and fully opened to perform the dust removal operation in the current scrap steel stacking and cutting area below. The remote control is electrically connected to the drive source of the automatic walking component.

[0020] Specific implementations of the present invention, such as Figures 1 to 9 As shown, the automatic walking assembly includes a high side retaining wall 4, a low side retaining wall 5, a heat-insulating retaining wall 6, an I-beam 7, track wheels 8, a mounting frame 9, and a three-in-one reducer 10 (using existing technology without modification). The high side retaining wall 4 and the low side retaining wall 5 are respectively fixed on the left and right sides of the scrap steel stacking and cutting area, and the high side retaining wall 4 is higher than the low side retaining wall 5. A heat insulation barrier 6 with a height of 700mm is vertically arranged on the high side barrier 4, and the heat insulation barrier 6 enters the interior of the suction hood 11 after it has reciprocated once and returned to the stop position. Two I-beams 7 are arranged along the length direction of the high side retaining wall 4 and the low side retaining wall 5 respectively, and eight first limit switches 12 are installed on the I-beams 7 on the high side retaining wall 4; Two track wheels 8 are matched with the two I-beams 7 respectively; The track wheels 8 are rotationally arranged in the mounting frame 9, and the mounting frame 9 is connected with the suction cover 11; A three-in-one speed reducer 10 is arranged on the mounting frame 9, and the three-in-one speed reducer 10 is connected with the track wheels 8 and electrically connected with the first limit switches 12 and the remote controller; The first impact rod 121 is fixedly arranged on the high side mounting frame 9.

[0021] The three-in-one speed reducer is a highly integrated transmission device of motor, speed reducer and brake, which has the characteristics of compact structure, convenient installation and simple maintenance, and is widely used in the fields of automatic production line, logistics equipment, hoisting machinery and the like.

[0022] In order to reduce the probability of steel slag adhering to the I-beams 7 and causing blockage in the subsequent movement of the suction cover 11, the further optimization of the above embodiment scheme is that the suction cover 11 is respectively provided with track cleaning assemblies 15 matched with the two I-beams 7, the track cleaning assembly 15 comprises a mounting plate 151, a steel bar 152, a fastening plate 153 and a fixing bolt 154, The mounting plate 151 is symmetrically welded on the left and right sides of the suction cover 11 mounting frame; The steel bars 152 in contact with the I-beams 7 are in contact with the outer side of the mounting plate 151; The fastening plate 153 is provided with the fixing bolts 154 connected with the mounting plate 151 to clamp and limit the steel bars 152 between the fastening plate 153 and the mounting plate 151, and the position of the steel bars 152 can be adjusted after subsequent wear.

[0023] In order to further improve the dust removal effect, the further optimization of the above embodiment scheme is that high-temperature-resistant metal dust sealing curtains 14 (belonging to prior art and not improved) are symmetrically arranged on the front and rear sides of the suction cover 11, the high-temperature-resistant metal dust sealing curtain is a flexible isolation device used in high-temperature industrial environment, which is composed of multiple layers of high-temperature-resistant metal curtain pieces, has the functions of fireproof, dustproof and heat insulation, and is widely used in high-temperature equipment isolation of metallurgy, glass, cement and other industries.

[0024] The further optimization of the above embodiment scheme is that three groups of fixed-point cutting positions and one group of stop positions are arranged along the walking path of the suction cover 11, the heat insulation retaining wall 6 is located in the stop position area, and the ground where the scrap steel is piled up in the cutting area has a slope; when the suction cover 11 moves to the stop position after going back and forth, the process of shoveling, cleaning and unloading the scrap steel under the suction cover 11 can be carried out immediately.

[0025] In order to reduce the wear of the first limit switch 12 and the second limit switch 16 during mechanical limiting process to prolong the service life of the device, the further optimization of the above embodiment scheme is that the surfaces of the first impact rod 121 and the second impact rod 13 are provided with high-temperature-resistant rubber layers.

[0026] In order to improve the sealing effect of the heavy hammer flap valve 3 and the pipeline 111 of the suction cover 11 after the butt joint to reduce the probability of dust overflow after the butt joint of the two, the further optimization of the above embodiment scheme is that, as shown in Figure 10 and Figure 11 Each sub flue 2 is provided with a second limit switch 16 with the same internal contact triggering direction and cooperating with the heavy hammer rod 31 of the corresponding heavy hammer flap valve 3, and the pipeline 111 and the heavy hammer flap valve 3 are provided with a sealing assembly electrically connected with the second limit switch 16; Specifically, the sealing assembly comprises a limiting plate 33, a circular plate 17, an annular groove 18, an annular air bag 19, a perforation, an air nozzle 191, a conveying pipe 20, a bidirectional air pump 21 (which belongs to the prior art and is not improved) and a timer. The limiting plate 33 is welded at the lower region of the outer wall of each heavy hammer flap valve 3, and the heavy hammer flap valve 3 passes through the limiting plate 33. The circular plate 17 is welded at the upper region of the outer wall of the pipeline 111, and the pipeline 111 passes through the circular plate 17. The spacing between the circular plate 17 and the limiting plate 33 is 1-1.5 cm. The annular groove 18 is formed in the circular plate 17, and the annular air bag 19 is arranged in the annular groove 18. The perforation passes through the annular groove 18 and the circular plate 17 in sequence, and the perforation is matched with the air nozzle 191 which communicates with the annular air bag 19. The conveying pipe 20 is communicated with the other end of the air nozzle 191 away from the annular air bag 19, and the conveying pipe 20 is communicated with the bidirectional air pump 21 fixed on the suction cover 11. The second limit switch 16, the timer and the bidirectional air pump 21 are electrically connected to start the bidirectional air pump 21 to supply air when the heavy hammer rod 31 of the heavy hammer flap valve 3 moves to the topmost end and continuously triggers the second limit switch 16 for more than 5 seconds. The remote controller is electrically connected with the bidirectional air pump 21 to manually trigger the annular air bag 19 to deflate and then start the driving source of the automatic walking assembly.

[0027] The bidirectional air pump is a positive displacement pump capable of realizing bidirectional gas conveying (air suction / exhaust). The pump cavity volume is periodically changed by mechanical structure to realize directional gas flow. In the present application, a piston type bidirectional air pump is adopted. It should be noted that the volume of gas filled into the annular air bag is pre-set to keep the expansion amount of the annular air bag consistent.

[0028] Further, in order to prolong the service life of the annular air bag 19, the outer layer of the annular air bag 19 is made of PET polyester fiber reinforced substrate, and the inner layer of the annular air bag 19 is provided with a silicon rubber layer to resist high temperature.

[0029] It should be noted that the three-in-one speed reducer 10, the first limit switch 12, the second limit switch 16, the bidirectional air pump 21 and the remote controller are electrically connected with the controller, and the controller is not shown in the figure.

[0030] The workflow of the application is as follows: The initial suction hood 11 is located at the stop position (i.e. the position where the first limit switch 12 at SQ1 deflects a fixed angle to the left to trigger the three-in-one speed reducer 10 to stop working, and the first limit switch 12 at SQ1 is in contact with the first impact rod 121), and the heat insulation barrier 6 is located inside the suction hood 11, as shown in the description Figure 5 and Figure 9 As shown, the workers then place scrap steel successively from the outside of the low side barrier 5 and along the length direction, and the scrap steel is placed in the cutting area with a slope to facilitate subsequent shovel transfer and unloading. The unloading is specifically carried out by a wheel loader which moves from high to low along the length direction of the scrap steel cutting area and cooperates with the heat insulation barrier 6 to shovel and unload the steel slag after cutting. The wheel loader is prior art and does not need to be improved. The high side barrier 4 and the low side barrier 5 can limit the movement direction of the waste slag, so as to avoid the overflow of scrap steel outside the barrier during unloading and loading. Then, the three-in-one speed reducer 10 is controlled to operate by the remote controller. After the three-in-one speed reducer 10 operates, the rotation of the track wheel 8 can be realized. Then, the track wheel 8 cooperates with the I-beam 7 to realize the horizontal position transfer of the suction hood 11 (to multiple working positions in turn). It should be noted that the movement speed of the suction hood 11 is slow so that the suction hood 11 can be accurately stopped at the current position immediately after the three-in-one speed reducer 10 stops working. The influence of inertia can be ignored. At this time, the detection end of the first limit switch 12 at SQ1 is separated from the first impact rod 121. Then, when the detection end of the first limit switch 12 at SQ2 is in contact with the first impact rod 121, deflection will occur, but at this time, the deflection direction is opposite to the pre-set deflection direction, so that the three-in-one speed reducer 10 does not stop and continues to move. When the detection end of the first limit switch 12 at SQ3 is in contact with the first impact rod 121, it will be deflected to the right by a fixed angle, triggering the internal mechanical contact. At this time, the first limit switch 12 feeds back a signal to the controller, which controls the motor in the three-in-one speed reducer 10 to stop. At this time, the horizontal area of the first impact rod 121 can keep the detection end of the first limit switch 12 at the triggering angle. At the same time, the second impact rod 13 will be in contact with the weight rod 31 of the weight flap valve 3 at the first fixed-point cutting position during the horizontal movement of the suction cover 11. As the orientation changes, the weight rod 31 can be gradually pushed to the highest point so that the valve plate 32 is automatically opened, allowing the suction cover 11 to communicate with the common flue 1 (at this time, the remaining sub-flues 2 are blocked from the outside due to the closed valve plate 32). The moment when the valve plate 32 is fully opened is the moment when the suction cover 11 stops moving, which allows the top end face of the pipeline 111 to accurately butt against the bottom end face of the weight flap valve 3 corresponding to the first fixed-point cutting position. Under the action of the induced draft fan, the dust generated during the flame cutting process at the fixed-point cutting position is sucked into the common flue 1 and eventually reaches the dust collector for treatment. During the gradual movement of the weight rod 31 at the first fixed-point cutting position to the highest point, the detection end of the second limit switch 16 will be deflected. When the weight rod 31 at the first fixed-point cutting position reaches the highest point (i.e., the valve plate 32 is fully opened), the detection end of the second limit switch 16 is at the deflection angle that triggers the internal mechanical contact. The second limit switch 16 feeds back a signal to the controller, which controls the bidirectional air pump 21 to operate, filling the annular air bag 19 with air. The inflated annular air bag 19 expands in the annular groove 18 and outwardly. When the inflated annular air bag 19 comes into contact with and tightly fits against the limit plate 33, it can circumferentially seal the joint between the weight flap valve 3 and the pipeline 111, reducing the probability of dust overflow during subsequent dust removal (when moving from right to left, the seal is activated only when stopping dust removal at SQ3, SQ5, and SQ7 (when continuously triggering the second limit switch 16 at SQ2, SQ4, and SQ6 for less than 5 seconds, the seal is not activated). When moving from left to right, the seal is activated only when stopping dust removal at SQ6, SQ4, and SQ2 (when continuously triggering the second limit switch 16 at SQ3, SQ5, and SQ7 for less than 5 seconds, the seal is not activated). When the flame cutting and dust removal of the scrap steel under the first fixed-point cutting position are completed, the annular air bag 19 is first deflated by controlling the bidirectional air pump 21 through the remote controller, and then the three-in-one speed reducer 10 is re-operated through the remote controller, so that the suction hood 11 can continue to move to the second fixed-point cutting position to perform the flame cutting and dust removal process of the scrap steel in other areas. In this process, the first impact rod 121 first contacts the first limit switch 12 at SQ4 but does not stop moving, then contacts the first limit switch 12 at SQ5 to trigger the suction hood 11 to stop and accurately dock with the second fixed-point cutting position, then start the sealing process and dust removal. When the flame cutting and dust removal of the scrap steel under the second fixed-point cutting position are completed, the three-in-one speed reducer 10 is re-operated by deflation and manual recovery; then move horizontally to the third fixed-point cutting position for dust removal, the principle is the same as above and will not be repeated here. When the first impact rod 121 contacts the first limit switch 12 at SQ8 and stops, it no longer moves to the left, and then the motor in the three-in-one speed reducer 10 is reversed by the remote controller, and then the suction hood 11 can pass through the third fixed-point cutting position, the second fixed-point cutting position and the first fixed-point cutting position in turn for two rounds of dust removal, and finally returns to the stop position and triggers the first limit switch 12 at SQ1 to stop moving. The two ends of the suction hood 11 move to the positions of SQ1 and SQ8 at most, and the two first limit switches 12 serve as limit switches. When the suction hood 11 moves back to the stop position, it can be unloaded by the wheel loader.

[0031] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A dust collector hood, characterized in that, Including public smoke ducts (1). An induced draft fan is installed at the rear end of the elevated public flue (1), and a dust collector is connected to the end of the public flue (1); Several sub-flues (2) are connected to a common flue (1) and are distributed at equal intervals; The heavy-duty flap valve (3) corresponds to and is connected to the sub-flue (2); The automatic walking component is located outside the scrap steel stacking and cutting area. The suction hood (11) is connected to the automatic walking component and is located above the scrap steel stacking and cutting area. Eight first limit switches (12) are installed on one side of the automatic walking component and are electrically connected to the drive source of the automatic walking component. The triggering direction of the internal contacts of the first limit switches (12) at SQ1, SQ2, SQ4 and SQ6 is opposite to the triggering direction of the internal contacts of the first limit switches (12) at SQ3, SQ5, SQ7 and SQ8. An inverted first impact rod (121) with an isosceles trapezoidal main body is set on the automatic walking assembly. The first impact rod (121) triggers one of the first limit switches (12) at SQ2-SQ7 to stop the suction hood (11). The end face of the pipe (111) connecting the top of the suction hood (11) is accurately aligned with the bottom face of the counterweight flap valve (3) on one of the sub-flues (2). The top face of the pipe (111) and the bottom face of the counterweight flap valve (3) have the same shape. When the first impact rod (121) triggers the first limit switch (12) at SQ1 / SQ8, the suction hood (11) stops and simultaneously reaches the farthest position. The second impact rod (13), which is an isosceles trapezoid in shape, is welded to the suction hood (11) by several connecting rods. After the first impact rod (121) triggers one of the first limit switches (12) at SQ2-SQ7, the second impact rod (13) contacts the hammer rod (31) of the hammer flap valve (3) at the current docking position, so that the valve plate (32) is automatically and fully opened to perform the dust removal operation of the current scrap steel stacking and cutting area below. The remote control is electrically connected to the drive source of the automatic walking component.

2. A dust collector hood according to claim 1, characterized in that, Each of the sub-flues (2) is provided with a second limit switch (16) with the same internal contact triggering direction and which cooperates with the hammer rod (31) of the corresponding hammer flap valve (3). The pipeline (111) and the hammer flap valve (3) are provided with a sealing assembly that is electrically connected to the second limit switch (16).

3. A dust collector hood according to claim 2, characterized in that, The sealing assembly includes a limiting plate (33), a circular plate (17), an annular groove (18), an annular airbag (19), a perforation, an air nozzle (191), a delivery pipe (20), a bidirectional air pump (21), and a timer. The limiting plate (33) is welded to the lower area of ​​the outer wall of each counterweight flap valve (3), and the counterweight flap valve (3) passes through the limiting plate (33). The circular plate (17) is welded to the upper area of ​​the outer wall of the pipe (111), and the pipe (111) passes through the circular plate (17). The distance between the circular plate (17) and the limiting plate (33) is 1-1.5cm. An annular groove (18) is formed on a circular plate (17), and an annular airbag (19) is provided inside the annular groove (18). The perforation passes through the annular groove (18) and the circular plate (17) in sequence, and the perforation is fitted with an air nozzle (191) that connects to the annular airbag (19). The delivery pipe (20) is connected to the other end of the air nozzle (191) away from the annular airbag (19), and the delivery pipe (20) is connected to the bidirectional air pump (21) fixed on the suction cover (11). The second limit switch (16), timer and bidirectional air pump (21) are electrically connected to start the bidirectional air pump (21) to supply air after the counterweight rod (31) of the counterweight flap valve (3) moves to the top and continuously triggers the second limit switch (16) for more than 5 seconds. The remote control is electrically connected to the two-way air pump (21) to manually trigger the deflating of the annular airbag (19) and then start the drive source of the automatic walking component.

4. A dust collector hood according to claim 3, characterized in that, The outer layer of the annular airbag (19) is made of PET polyester fiber reinforced substrate, and the inner layer of the annular airbag (19) is provided with a silicone rubber layer.

5. A dust collector hood according to claim 1, characterized in that, The automatic walking assembly includes a high side retaining wall (4), a low side retaining wall (5), a heat-insulating retaining wall (6), an I-beam (7), track wheels (8), a mounting frame (9), and a three-in-one reducer (10). The high side retaining wall (4) and the low side retaining wall (5) are respectively fixed on the left and right sides of the scrap steel stacking and cutting area, and the high side retaining wall (4) is higher than the low side retaining wall (5). A heat-insulating barrier wall (6) with a height of 700mm is vertically installed on the high side barrier wall (4); Two I-beams (7) are laid along the length of the high side retaining wall (4) and the low side retaining wall (5), respectively, and eight first limit switches (12) are installed on the I-beams (7) on the high side retaining wall (4). Two track wheels (8) are respectively matched with two I-beams (7); The track wheel (8) is rotatably mounted inside the mounting frame (9), and the mounting frame (9) is connected to the suction hood (11); The three-in-one reducer (10) is installed on the mounting frame (9), and the three-in-one reducer (10) is connected to the track wheel (8) and electrically connected to the first limit switch (12) and the remote control; The first impact bar (121) is fixed on the high side mounting bracket (9).

6. A dust collector hood according to claim 1, characterized in that, The suction hood (11) is provided with track cleaning components (15) that cooperate with the two I-beams (7). The track cleaning components (15) include mounting plates (151), reinforcing bars (152), fastening plates (153) and fixing bolts (154). Mounting plates (151) are symmetrically welded to the left and right sides of the suction hood (11) mounting frame; Several reinforcing bars (152) whose bottoms are in contact with the I-beam (7) are in contact with the outer side of the mounting plate (151); The fastening plate (153) is provided with a number of fixing bolts (154) connected to the mounting plate (151) to clamp and limit a number of reinforcing bars (152) between the fastening plate (153) and the mounting plate (151) and the position of the reinforcing bars (152) can be adjusted after subsequent wear.

7. A dust collector hood according to claim 1, characterized in that, High-temperature resistant metal dust curtains (14) are symmetrically arranged on the front and rear sides of the suction hood (11).

8. A dust collector hood according to claim 1, characterized in that, Three sets of fixed-point cutting positions and one set of stop positions are set along the walking path of the suction hood (11), and the heat insulation baffle (6) is located in the stop position area. The ground where the scrap steel stacking and cutting area is located has a slope.

9. A dust collector hood according to claim 1, characterized in that, The surfaces of the first impact bar (121) and the second impact bar (13) are both provided with a high-temperature resistant rubber layer.

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