Steel rolling piece purging device and control method

Abstract

The application discloses a kind of section steel rolling piece blowing device, comprising: first blowing mechanism and second blowing mechanism, all be connected to walking mechanism;First blowing mechanism includes first pneumatic control system, first pneumatic control system is configured to be able to blow out airflow to section steel rolling piece to form first air curtain;Second blowing mechanism includes second pneumatic control system, second pneumatic control system is configured to be able to blow out airflow to web to form second air curtain, and second blowing mechanism can be driven by walking mechanism, along the length direction of section steel rolling piece moves;The section steel rolling piece blowing device of the application, design movable double blowing mechanism, by the periodic opening and closing of first air curtain, cooperate with the movement of second blowing mechanism and blow, both avoid water overflow, and also utilize water pressure to realize rapid discharge, greatly improve water removal efficiency, realize the water and stubborn water stain of high-efficiency removal H section steel.The application further discloses a kind of control method of section steel rolling piece blowing device.

Description

Technical Field

[0001] This invention belongs to the technical field of steel rolling process equipment. Specifically, this invention relates to a steel rolling blowing device and control method. Background Technology

[0002] In the field of H-beam rolling production, after small-diameter H-beams are rolled and shaped, they need to be cut to length according to production standards. In actual production, to improve overall production efficiency, the length cutting process generally adopts a parallel and synchronous cutting operation mode for multiple sets of H-beams.

[0003] During the cutting process using saw blades, in order to reduce the operating temperature of the saw blade, minimize saw blade wear, and ensure the quality of the cut surface, cooling water needs to be continuously sprayed onto the saw blade for cooling and protection. This cooling water is very likely to accumulate and remain on the surface of the web of the H-beam. After the rolled piece is cut, when it is transferred to the next process via the conveyor rollers, a compressed air blowing mechanism is generally set up on the production site to clean and remove the water accumulated on the surface of the web using airflow.

[0004] Currently, the compressed air pressure supplied by the general pipeline network of H-beam steel production enterprises is between 0.4MPa and 0.6MPa. Existing conventional purging equipment is limited by the air source pressure and layout structure, resulting in obvious drawbacks in actual operation: if the air outlet pressure of the purging nozzle is too low, the airflow impact force is insufficient, and it is impossible to completely blow away the residual water adhering to the surface of the H-beam web; if the purging outlet pressure is increased, the strong airflow can easily blow away the water on the surface of a single rolled piece, causing water mist and water to adhere to the web of other adjacent H-beams arranged side by side, thus expanding the water adhesion range.

[0005] Meanwhile, the entire production line for H-beams has a tightly integrated process flow, including multiple continuous operations such as roller conveying, finished product collection, and profile bundling. The overall production pace is fast, and the rolled pieces are always in a continuous state of movement. It is impossible to extend the blowing operation time by slowing down or stopping the machine, which further increases the difficulty of cleaning water accumulation on the web plate, making it difficult to effectively and thoroughly remove water accumulation on the surface of the H-beam web plate.

[0006] In addition, the R-angle position where the web and flange of the H-beam connect has a special structure, with a small space and poor water flow performance. Cooling water is very likely to form a stable water film at this position. Compared with the flat area of ​​the web, the water stains formed in this part are more stubborn and difficult to be effectively cleaned by conventional airflow purging methods.

[0007] H-beams with residual water and stubborn water stains are prone to rapid oxidation and corrosion during subsequent warehousing, sales, and transportation due to external temperature and humidity conditions. This results in large areas of rust spots on the surface of the profiles, significantly reducing the appearance quality and performance of the finished H-beams and easily leading to customer quality objections and frequent product quality disputes.

[0008] Chinese patent CN118808573A discloses a water blowing device, water blowing control method and production line for irregularly shaped continuous casting billets. This solution completes the surface water blowing operation of the billet by designing a water blowing device for the billet and controlling the flow rate of nozzles with different cross sections. However, this technical solution is applied to continuous casting billets under high temperature conditions. The overall equipment structure, airflow parameters and blowing logic are designed around the working conditions of high temperature billets, and are not adapted to the surface water accumulation characteristics and conveying conditions of cold rolled profiles. Therefore, it cannot meet the actual water blowing requirements of cold H-beam rolled products.

[0009] Chinese patent CN206345936U discloses a device for improving the effect of electrocoating. The device integrates hot water spraying and compressed air blowing structures, and relies on a moving hanger to clean water accumulation in the workpiece gaps. It can eliminate the problem of corrosion in the gaps to a certain extent. However, the device is only suitable for low-water-volume and low-speed operation scenarios such as coating pretreatment. It cannot be adapted to the complex production environment of large water residue after H-beam cutting, high-speed continuous operation of production lines, and parallel synchronous conveying of multiple rolled parts. It is difficult to solve the problem of cleaning large areas of water accumulation and splash water in the fast-paced production mode.

[0010] A cleaning device and control method for rolled steel sections are provided, particularly concerning how to efficiently remove accumulated water and stubborn water stains from H-beams. Summary of the Invention

[0011] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a purging device and control method for rolled steel sections, with the purpose of efficiently removing accumulated water and stubborn water stains from H-beams.

[0012] To achieve the above objectives, the technical solution adopted by the present invention is: a steel section rolling mill cleaning device, comprising:

[0013] A crossbeam spans across the roller conveyor that transports rolled steel sections.

[0014] A traveling mechanism, mounted on the crossbeam, is capable of moving along the length of the crossbeam; and

[0015] The first purging mechanism and the second purging mechanism are both connected to the walking mechanism;

[0016] The first purging mechanism includes a first pneumatic control system configured to blow airflow toward the steel section to form a first air curtain;

[0017] The second purging mechanism includes a second pneumatic control system configured to blow airflow toward the web to form a second air curtain, and the second purging mechanism can be driven by the walking mechanism to move along the length of the steel section.

[0018] The device is configured to control the first pneumatic control system to periodically switch between the open state and the closed state, and simultaneously control the second purging mechanism to move and purge.

[0019] The first air control system includes a first general air curtain unit and a first hot air curtain unit arranged in parallel, and the first general air curtain unit and the first hot air curtain unit are connected to the first air inlet pipe;

[0020] The first general wind curtain unit is configured to form a first wind curtain to block water accumulation;

[0021] The first hot air curtain unit includes a gas heater for generating hot air to dry water stains.

[0022] The air outlet of the first general wind curtain unit forms an acute angle with the web of the rolled steel section;

[0023] And / or, the air outlet of the first hot air curtain unit is perpendicular to the web of the rolled steel section.

[0024] The second air control system includes a second general air curtain unit, which includes a horizontal air curtain opening and an inclined air curtain opening. Inclined air curtain openings are provided on both sides of the horizontal air curtain opening, and the inclined air curtain openings are configured to blow out inclined airflow toward the connection between the web and the flange of the rolled steel section.

[0025] The second pneumatic control system also includes a film-breaking unit, which and the second general air curtain unit are connected to the second air inlet pipe. The film-breaking unit includes a high-pressure nozzle, and the spray direction of the high-pressure nozzle is toward the web of the steel section.

[0026] The first purging mechanism further includes a first lifting drive component, used to drive the first pneumatic control system to lift relative to the steel section;

[0027] When the first lifting drive component drives the water blowing bracket of the first pneumatic control system to the low position, it can serve as a positioning baffle for the steel section.

[0028] The present invention also provides a control method for the aforementioned steel section rolling mill purging device, comprising:

[0029] The first pneumatic control system of the first purging mechanism is activated to form a first air curtain to block water accumulation on the web of the rolled steel section.

[0030] The second pneumatic control system of the second purging mechanism is activated, and the walking mechanism is controlled to drive the second purging mechanism to move and purge along the length of the web plate.

[0031] During the purging process of the second purging mechanism, the first pneumatic control system is periodically shut down to release the water blocked by the first air curtain.

[0032] The step of controlling the first pneumatic control system to periodically shut down includes:

[0033] After the second purging mechanism starts moving and purging for a first preset time, the first pneumatic control system is controlled to shut down for a second preset time, and then the first pneumatic control system is turned on again.

[0034] The operation of closing the second preset time and then turning it on is repeated cyclically.

[0035] Furthermore, the control method for the steel section rolling mill purging device further includes the following steps:

[0036] When a signal is detected that the steel section has been cut to length, the first pneumatic control system of the first blowing mechanism is switched to generate hot air, and the first blowing mechanism is raised.

[0037] Simultaneously, the second general air curtain unit of the second purging mechanism is closed, and the membrane breaking unit of the second purging mechanism is opened.

[0038] Furthermore, the control method for the aforementioned steel section rolling mill purging device also includes the following static purging mode:

[0039] Control the first purging mechanism and the second purging mechanism to move and position themselves to the preset positions of the steel section rolls;

[0040] Control the opening of the hot air curtain unit of the first purging mechanism and the second general air curtain unit and membrane breaking unit of the second purging mechanism;

[0041] The roller conveyor is controlled to transport the rolled steel section through the preset position.

[0042] Furthermore, the control method for the aforementioned steel section rolling mill purging device also includes the following moving purging mode:

[0043] Control the first and second purging mechanisms to rise;

[0044] Control the opening of the hot air curtain unit of the first purging mechanism and the second general air curtain unit and membrane breaking unit of the second purging mechanism;

[0045] The walking mechanism is controlled to synchronously drive the first purging mechanism and the second purging mechanism to move along the length direction of the stationary steel section.

[0046] Furthermore, the control method for the purging device for the rolled steel section further includes a combined purging mode, wherein the combined purging mode includes:

[0047] First, the fixed-length blowing process is performed: during the fixed-length sawing of the rolled steel section, the first pneumatic control system of the first blowing mechanism is turned on to block the water accumulation, and the second blowing mechanism is moved to blow. At the same time, the first pneumatic control system is periodically turned off to release the water accumulation. After the sawing is completed, the first blowing mechanism is raised and switched to generate hot air. At the same time, the film breaking unit of the second blowing mechanism is turned on to dry the rolled steel section with hot air and break the film.

[0048] Then, the roller conveyor blowing process is performed: the first blowing mechanism and the second blowing mechanism are positioned, and the roller conveyor is controlled to convey the steel section through. During this process, the hot air curtain unit of the first blowing mechanism and the second general air curtain unit and the film breaking unit of the second blowing mechanism are kept open to blow the web of the moving section.

[0049] Finally, the purging process of the platform area is performed: after the steel section roll stops at the collection platform, the first purging mechanism and the second purging mechanism are controlled to rise synchronously, and the traveling mechanism is controlled to drive them to move along the length direction of the steel section roll. At the same time, the hot air curtain unit, the second general air curtain unit and the film breaking unit are kept open to move and purge the web of the stationary steel section roll.

[0050] The steel section rolling blowing device of the present invention is designed with a movable double blowing mechanism. By periodically opening and closing the first air curtain, and cooperating with the moving blowing of the second blowing mechanism, it not only avoids water overflow, but also uses the water pressure to achieve rapid discharge, which greatly improves the water removal efficiency and achieves efficient removal of water accumulation and stubborn water stains from H-beams.

[0051] In response to the characteristics of the cross-sectional shape of H-beams, a zoned blowing air curtain was designed. The horizontal air curtain covers the web plane, while the inclined air curtain is aimed at the R-corner area. In conjunction with the high-pressure film-breaking nozzles, the stubborn water film is broken up, and then the water is quickly dried by the hot air curtain, which fundamentally solves the technical problem of water stains in the R-corner that are difficult to remove. Attached Figure Description

[0052] This manual includes the following figures, which illustrate the following:

[0053] Figure 1 This is a schematic diagram of the overall layout of the steel section rolling blowing device of the present invention, showing the installation position of the device on the H-beam production line;

[0054] Figure 2 This is a schematic diagram of the main structure of the steel roll blowing device of the present invention, which also shows the overall connection relationship of the PLC control system;

[0055] Figure 3 This is a schematic diagram of the pneumatic control system structure of the first purging mechanism of the present invention;

[0056] Figure 4 This is a schematic diagram showing the angle switching of the first purging mechanism;

[0057] Figure 5 This is a schematic diagram showing the change in the air outlet angle of a general-purpose air curtain duct;

[0058] Figure 6 This is a schematic diagram of the pneumatic control system structure of the second purging mechanism of the present invention;

[0059] Figure 7a This is a schematic diagram of the air outlet and high-pressure nozzle of the second general wind curtain unit;

[0060] Figure 7b This is a schematic diagram of the air outlet purging status of the second general wind curtain unit;

[0061] Figure 8 This is the control logic diagram for the fixed-length blowing mode of the present invention;

[0062] Figure 9 This is the control logic diagram for the roller conveyor blowing mode of the present invention;

[0063] Figure 10 This is a control logic diagram for the collection platform purging mode of the present invention.

[0064] The component names corresponding to each number in the diagram are as follows:

[0065] 1-Column, 2-Beam, 3-Traveling mechanism, 4-First purging mechanism, 5-Second purging mechanism, 6-Cold saw system, 7-Fixed length water blower, 8-Roller conveyor, 9-Collection platform, 10-Steel section; 31-Rack, 32-Gear, 33-Reducer assembly, 34-Counting encoder, 35-Cable support, 36-Limit system, 361-Water blowing backward limit, 362-Water blowing intermediate limit, 363-Water blowing forward limit, 364-Water blowing lift limit, 365-Water blowing lower limit; 41-First lifting drive, 42-Water blowing first support, 43-First pneumatic control system, 431-First general-purpose... Air curtain unit, 432-first hot air curtain unit, 433-first electrical control box, 434-perforated baffle, 4311-general air solenoid valve, 4312-general air curtain pipe, 4321-hot air solenoid valve, 4322-gas heater, 4323-hot air curtain pipe; 51-second lifting drive, 52-water blowing bracket, 53-second pneumatic control system, 531-second general air curtain unit, 532-film breaking unit, 533-second electrical control box, 5311-air curtain solenoid valve, 5312-horizontal air curtain opening, 5313-tilted air curtain opening, 5321-film breaking solenoid valve, 5322-high pressure nozzle;

[0066] Figures 8 to 10 The symbols for each functional block are explained below:

[0067] SUB - Subtraction function block, MUL - Multiplication function block, PDE - Delay function block, ANG - AND function block, RSR - RS flip-flop function block with R-priority reset terminal. Detailed Implementation

[0068] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0069] It should be noted that in the following embodiments, the terms "first," "second," and "third" do not represent an absolute distinction in structure and / or function, nor do they represent the order of execution; they are merely for the convenience of description.

[0070] Firstly, such as Figures 1 to 9 As shown, this embodiment of the invention provides a purging device for rolled steel sections 10, which mainly includes:

[0071] The crossbeam 2 spans across the roller conveyor 8 that transports the rolled steel section 10;

[0072] A traveling mechanism, mounted on the crossbeam 2, is capable of moving along the length of the crossbeam 2; and

[0073] The first purging mechanism 4 and the second purging mechanism 5 are both connected to the walking mechanism;

[0074] The first purging mechanism 4 includes a first air control system 43, which is configured to blow airflow toward the steel section 10 to form a first air curtain.

[0075] The second purging mechanism 5 includes a second air control system 53, which is configured to blow airflow onto the web to form a second air curtain. The second purging mechanism 5 is driven by a walking mechanism to move along the length of the steel section 10 to achieve the functions of air curtain purging and water film destruction.

[0076] The device is configured to control the first pneumatic control system 43 to periodically switch between an on and off state, and simultaneously control the second purging mechanism 5 to move and purge.

[0077] Specifically, in this embodiment of the invention, the provided purging device and control method for H-beam rolled sections 10 aims to solve the technical problem of difficult removal of water accumulation on the web and stubborn water stains at the radius corners after fixed-length cutting of existing H-beam rolled sections 10. By employing two sets of water-blowing mechanisms, multiple control modes are achieved, such as one-stop-one-blowing, two unidirectional blowing, and two opposing blowing. Simultaneously, the parallel air curtain and angled air curtain designs, along with the periodic purging control system, can maximally remove accumulated water, achieving efficient removal of water accumulation and stains from the web of the H-beam. Furthermore, for the problem of water stain adhesion, the design of localized film-breaking to disperse water stains and high-temperature gas drying fundamentally solves all technical difficulties.

[0078] In embodiments of the present invention, such as Figure 1 and Figure 2 As shown, two traveling mechanisms are provided: a first traveling mechanism and a second traveling mechanism. A first purging mechanism 4 is connected to the first traveling mechanism, and a second purging mechanism 5 is connected to the second traveling mechanism. The first and second traveling mechanisms have essentially the same structure and are both movably mounted on the crossbeam 2, capable of moving along the length of the crossbeam 2. The first traveling mechanism drives the first purging mechanism 4 to move linearly along the length of the crossbeam 2, and the second traveling mechanism drives the second purging mechanism 5 to move linearly along the length of the crossbeam 2. The first purging mechanism 4, the second purging mechanism 5, the first traveling mechanism, and the second traveling mechanism are electrically connected to the PLC control system. The crossbeam 2 is supported by columns 1, which are symmetrically fixed on both sides of the roller conveyor 8 for conveying the rolled steel section 10. The crossbeam 2 spans across the roller conveyor 8 and is fixedly connected to the top of the columns 1.

[0079] The first purging mechanism 4 is connected to the first traveling mechanism via the first lifting drive component 41, and the second purging mechanism 5 is connected to the second traveling mechanism via the second lifting drive component 51. The PLC control system is electrically connected to the first traveling mechanism, the second traveling mechanism, the first lifting drive component 41, the second lifting drive component 51, the first purging mechanism 4, and the second purging mechanism 5, respectively, to realize the coordinated control of each component.

[0080] This device can be flexibly installed according to the actual needs of the production site: it can be directly installed in the rear section of the cold saw system 6, integrating fixed length positioning and water blowing functions to form a fixed length water blower 7; it can be installed at any position of the conveyor roller table 8 to realize static blowing of continuously running rolled pieces; it can also be installed in the area of ​​the collection platform 9 to realize full-process moving blowing of stationary rolled pieces, so that H-beam rolled pieces 10 can be targeted for water blowing operations in the entire process of fixed length cutting, roller table 8 conveying, collection and binding.

[0081] In embodiments of the present invention, such as Figure 2 As shown, the traveling mechanism includes a rack 31, a gear 32, a reducer assembly 33, a counting encoder 34, a support cable 35, and a limit system 36. The rack 31 is fixed to the lower surface of the crossbeam 2 along its length. The reducer assembly 33 is fixed to the mounting base of the traveling mechanism, and its output shaft is fixedly connected to the gear 32. The gear 32 meshes with the rack 31 to achieve linear movement of the traveling mechanism along the crossbeam 2. The counting encoder 34 is coaxially connected to the output shaft of the reducer assembly 33, used to detect the traveling distance of the traveling mechanism in real time and achieve precise positioning. The support cable 35 moves synchronously with the traveling mechanism, used to supply power and compressed air to various electrical and pneumatic components.

[0082] The limiting system 36 includes a travel limiting component and a lifting limiting component. The travel limiting component, along the length of the crossbeam 2, includes a backward water-blowing limiting component 361, a middle water-blowing limiting component 362, and a forward water-blowing limiting component 363. The first forward water-blowing limiting component and the second backward water-blowing limiting component are two independent contacts of the same limit switch; the first backward water-blowing limiting component and the second forward water-blowing limiting component are two independent contacts of the same limit switch; and the first middle water-blowing limiting component and the second middle water-blowing limiting component are two independent limit switches. The lifting limiting component includes a raised water-blowing limiting component 364 and a lowered water-blowing limiting component 365, used to limit the highest and lowest working positions of the purging mechanism, respectively.

[0083] To ensure the water blowing effect matches the production rhythm, the walking speed of the traveling mechanism is designed to be 3-5 m / min. In this embodiment of the invention, the traveling mechanism adopts a gear and rack transmission. The module of gear 32 is 10, the number of teeth of gear 32 is Z=24, and the reducer assembly 33 is a cycloidal pinwheel reducer with a speed ratio I=59, which ensures smooth operation and high positioning accuracy.

[0084] In embodiments of the present invention, such as Figures 2 to 5 As shown, a first lifting drive 41 is provided on the first walking mechanism. The first lifting drive 41 is used to control the first blowing mechanism 4 to switch between a low position and a high position. The height of the first blowing mechanism 4 in the low position is less than that in the high position. The distance between the first blowing mechanism 4 and the steel section 10 is closer in the low position.

[0085] The first purging mechanism 4 also includes a water-blowing bracket 42 and a first pneumatic control system 43, which is mounted on the water-blowing bracket 42. The first lifting drive component 41 is a telescopic component, such as a cylinder. One end of the first lifting drive component 41 is rotatably connected to the mounting base of the first traveling mechanism, and the other end is rotatably connected to the water-blowing bracket 42, used to drive the water-blowing bracket 42 and the first pneumatic control system 43 to rotate as a whole. The upper end of the water-blowing bracket 42 is rotatably connected to the mounting base of the first traveling mechanism. The length direction of the crossbeam 2 and the rolled steel section 10 is parallel to the first direction. The rotation center line of the first lifting drive component 41 driving the water-blowing bracket 42 to rotate up and down is parallel to the second direction. Both the first and second directions are horizontal and perpendicular to each other.

[0086] In embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the water-blowing bracket 42 is welded from structural steel, and its lower end is fixedly connected to a perforated stop head 434434. The perforated stop head 434434 has a rectangular frame structure and multiple through holes. When the first lifting drive component 41 drives the first blowing mechanism 4 to rotate downward, causing the first blowing mechanism 4 to switch to a low position, the perforated stop head 434434 can act as a length-fixing baffle for the structural steel roll 10. The perforated stop head 434434 limits the structural steel roll 10 at one end, and at the same time, the perforated structure of the perforated stop head 434434 allows water accumulated on the web surface of the structural steel roll 10 to drain smoothly, preventing water accumulation.

[0087] In embodiments of the present invention, such as Figures 2 to 5 As shown, the first pneumatic control system 43 includes a first general air curtain unit 431 and a first hot air curtain unit 432 arranged in parallel, as well as a first electrical control box 433. The air inlet ends of the first general air curtain unit 431 and the first hot air curtain unit 432 are both connected to a first air inlet pipe, which is connected to an air source. The first air inlet pipe is used to supply compressed air provided by the air source to the first general air curtain unit 431 and the first hot air curtain unit 432. The air outlet ends of the first general air curtain unit 431 and the first hot air curtain unit 432 are respectively directed toward the web of the lower steel section 10.

[0088] In this embodiment of the invention, the first general-purpose air curtain unit 431 is configured to form a first air curtain to block accumulated water. The first general-purpose air curtain unit 431 includes a general-purpose solenoid valve 4311 and a general-purpose air curtain pipe 4312 connected in sequence. The inlet of the general-purpose solenoid valve 4311 is connected to the first air inlet pipe, and the outlet of the general-purpose solenoid valve 4311 is connected to the inlet of the general-purpose air curtain pipe 4312. The general-purpose air curtain pipe 4312 adopts a flat air knife structure and is provided with an air outlet for air discharge to form a first air curtain to block accumulated water. The air outlet extends along the length direction of the general-purpose air curtain pipe 4312 and can simultaneously blow air onto multiple steel rolls 10 below. The length direction of the general-purpose air curtain pipe 4312 is parallel to the second direction.

[0089] In this embodiment of the invention, the first hot air curtain unit 432 includes a hot air solenoid valve 4321, a gas heater 4322, and a hot air curtain pipe 4323 connected in sequence. The gas heater 4322 is used to heat the internal gas to generate hot air for drying water stains. The inlet of the hot air solenoid valve 4321 is connected to the first air inlet pipe, and the outlet of the hot air solenoid valve 4321 is connected to the inlet of the hot air curtain pipe 4323. The hot air curtain pipe 4323 adopts a flat air knife structure and is provided with an air outlet for air discharge. The air outlet extends along the length direction of the hot air curtain pipe 4323, which can simultaneously blow the heated hot air onto multiple steel rolls 10 below to dry water stains. The length direction of the hot air curtain pipe 4323 is parallel to the second direction. The first electrical control box 433 is communicatively connected to the PLC control system and is used to control the opening and closing of the general air solenoid valve 4311, the hot air solenoid valve 4321, and the gas heater 4322. The general air solenoid valve 4311 and the hot air solenoid valve 4321 are used to control the on / off state of two parallel air circuits, respectively.

[0090] like Figure 3 and Figure 4 As shown, the height of the hot air curtain pipe 4323 is less than the height of the ordinary air curtain pipe 4312, which shortens the distance between the hot air curtain pipe 4323 and the steel section 10, avoids heat loss of the hot air curtain, and improves drying efficiency.

[0091] When the first blowing mechanism 4 is in the high position, it is tilted. The outlet of the hot air curtain pipe 4323 is perpendicular to the web of the lower steel section 10. That is, the airflow from the outlet of the hot air curtain pipe 4323 blows vertically downwards onto the web of the lower steel section 10. At this time, the airflow direction from the outlet of the hot air curtain pipe 4323 is perpendicular to the top surface of the web of the steel section 10, and the top surface of the web is parallel to the first and second directions. The hot airflow direction is perpendicular to the web of the steel section 10. Compared with angled blowing, this reduces airflow overflow and maximizes the efficiency of drying water stains.

[0092] When the first purging mechanism 4 is in the high position, the steel section 10 is cut and transported to the next process by the roller conveyor 8. The first hot air curtain unit 432 works in conjunction with the second purging mechanism 5 to generate hot air and dry the residual water stains on the web.

[0093] When the first purging mechanism 4 is in a low position, the first purging mechanism 4 is in a vertical position. The air outlet of the general air curtain pipe 4312 forms an acute angle with the web of the lower steel rolling piece 10, preferably a 45° acute angle. That is, the airflow from the air outlet of the general air curtain pipe 4312 blows obliquely downward toward the web of the lower steel rolling piece 10. At this time, the angle between the airflow direction of the air outlet of the general air curtain pipe 4312 and the top surface of the web of the steel rolling piece 10 is 45°. The top surface of the web is parallel to the first direction and the second direction.

[0094] In embodiments of the present invention, such as Figure 2 and Figure 6 As shown, a second lifting drive 51 is provided on the second walking mechanism. The second lifting drive 51 is used to control the second blowing mechanism 5 to switch between a low position and a high position. The height of the second blowing mechanism 5 in the low position is less than that in the high position. The distance between the second blowing mechanism 5 and the steel section 10 is closer in the low position.

[0095] The second purging mechanism 5 also includes a second water-blowing bracket 52 and a second pneumatic control system 53, which is mounted on the second water-blowing bracket 52. The second lifting drive component 51 is a telescopic component, such as a cylinder. One end of the second lifting drive component 51 is rotatably connected to the mounting base of the second traveling mechanism, and the other end is rotatably connected to the second water-blowing bracket 52, for driving the second water-blowing bracket 52 and the second pneumatic control system 53 to rotate as a whole. The upper end of the second water-blowing bracket 52 is rotatably connected to the mounting base of the second traveling mechanism. When the second lifting drive component 51 drives the second water-blowing bracket 52 to rotate up and down, the rotation center line is parallel to the second direction.

[0096] In embodiments of the present invention, such as Figure 6 and Figure 7a As shown, the second air control system 53 includes a second general air curtain unit 531 and a second electrical control box 533. The second general air curtain unit 531 includes a horizontal air curtain opening 5312 and an inclined air curtain opening 5313. The horizontal air curtain opening 5312 is configured to blow airflow toward the web of the steel section 10 below. Inclined air curtain openings 5313 are provided on both sides of the horizontal air curtain opening 5312. The inclined air curtain openings 5313 are configured to blow airflow toward the connection between the web and the flange of the steel section 10. The steel section 10 includes a web and two flanges. The two flanges are vertical, and the web is located between the two flanges. The two flanges are fixedly connected to both ends of the web.

[0097] like Figure 6 and Figure 7a As shown, the second air control system 53 also includes a film breaking unit 532. The film breaking unit 532 and the second general air curtain unit 531 are connected to the second air inlet pipe. The film breaking unit 532 includes a high-pressure nozzle 5322. The spray direction of the high-pressure nozzle 5322 is towards the connection between the web and the flange of the steel section 10.

[0098] like Figure 6 and Figure 7a As shown, the air inlet ends of the second general air curtain unit 531 and the membrane breaking unit 532 are both connected to the second air inlet pipe, which is connected to the air source. The second air inlet pipe is used to supply compressed air provided by the air source to the second general air curtain unit 531 and the membrane breaking unit 532. The air outlet ends of the second general air curtain unit 531 and the membrane breaking unit 532 are respectively directed toward the web of the lower steel section 10 and the connection between the web and the flange.

[0099] like Figure 6 and Figure 7a As shown, in this embodiment of the invention, the second general air curtain unit 531 includes an air curtain solenoid valve 5311, a first connecting pipe, and general air nozzles connected in sequence. The inlet of the air curtain solenoid valve 5311 is connected to the second air inlet pipe, the outlet of the air curtain solenoid valve 5311 is connected to the inlet of the first connecting pipe, and the outlet of the first connecting pipe is connected to the general air nozzle. The length direction of the first connecting pipe is parallel to the second direction. Horizontal air curtain openings 5312 and inclined air curtain openings 5313 are provided on the general air nozzles. Multiple general air nozzles are provided, each corresponding to a steel section 10. All general air nozzles are arranged sequentially along the length direction of the first connecting pipe, and can simultaneously blow air onto multiple steel sections 10 below.

[0100] like Figure 7a and Figure 7b As shown, the blower nozzle is provided with a first air intake chamber, a second air intake chamber and a third air intake chamber. The first air intake chamber, the second air intake chamber and the third air intake chamber are cavities that contain air. The first air intake chamber, the second air intake chamber and the third air intake chamber are connected to the first connecting pipe. The first air intake chamber, the second air intake chamber and the third air intake chamber are separated by partitions and are not connected to each other.

[0101] Two second air intake chambers are provided, with the first and third air intake chambers arranged on opposite sides of all the second air intake chambers. A horizontal air curtain 5312 is an air outlet located at the bottom of each second air intake chamber, connected to it. The horizontal air curtain 5312 is a narrow, elongated slit structure with a small gap width, located on the bottom surface of the general-purpose nozzle. The angle between the length directions of the two horizontal air curtains 5312 at the bottom of the two second air intake chambers is an obtuse angle, preferably 160°. This helps to gather the water blown by the inclined air curtain 5313 and the horizontal air curtain 5312 towards the center of the steel web, improving the water blowing efficiency. The horizontal air curtains 5312 at the bottom of the two second air intake chambers are connected, resolving the airflow gap created by the partition between the two air intake chambers, ensuring the blowing intensity in the web plane area, and guaranteeing the horizontal blowing effect.

[0102] An inclined air curtain 5313 is provided on the side of the first air inlet chamber, and another inclined air curtain 5313 is provided on the side of the third air inlet chamber. The inclined air curtain 5313 is a narrow slit structure with a small gap width provided on the side of the general air nozzle. The angle between the length direction of the inclined air curtain 5313 and the length direction of the adjacent horizontal air curtain 5312 is an obtuse angle, and the angle is preferably 135°, to ensure that the inclined air curtain completely covers the web R-corner area of ​​the steel section 10 and prevent water from overflowing from the R-corner area.

[0103] Preferably, the second purging mechanism 5 is in a low position, and the horizontal air curtain opening 5312 of the second general air curtain unit 531 forms a 45° angle with the web of the steel section 10. That is, the airflow of the horizontal air curtain opening 5312 blows obliquely downwards towards the web of the steel section 10. At this time, the angle between the airflow direction of the horizontal air curtain opening 5312 and the top surface of the web of the steel section 10 is 45°. In this way, the second purging mechanism 5 moves to purge, and the steel section 10 remains stationary, which can play the role of draining the water accumulated in the web.

[0104] The second purging mechanism 5 performs mobile purging, that is, it controls the second traveling mechanism to drive the second purging mechanism 5 to move along the length of the web plate to perform mobile purging; during the purging process, the horizontal air curtain opening 5312 of the second general air curtain unit 531 forms a 45° angle with the web plate of the steel section 10.

[0105] like Figure 6 and Figure 7aAs shown, in this embodiment of the invention, the membrane breaking unit 532 further includes a membrane breaking solenoid valve 5321. The inlet of the membrane breaking solenoid valve 5321 is connected to the second air inlet pipe, and the outlet of the membrane breaking solenoid valve 5321 is connected to the inlet of the second connecting pipe. The outlet of the second connecting pipe is connected to the high-pressure nozzle 5322, and multiple outlets are provided on the second connecting pipe. The high-pressure nozzle 5322 is integrated into the general air nozzle, with a high degree of integration. Two high-pressure nozzles 5322 are provided on each general air nozzle, and the two high-pressure nozzles 5322 correspond to the connection part between the web and two flanges of a steel section 10, i.e., the R-angle area of ​​the web.

[0106] Preferably, the high-pressure nozzle 5322 is a flat nozzle, with its spray direction directed towards the R-angle area at the junction of the web and flange of the rolled steel section 10, to disperse the strongly adhering residual water film in this area. The second electrical control box 533 is communicatively connected to the PLC control system and is used to control the opening and closing of the air curtain solenoid valve 5311 and the film-breaking solenoid valve 5321. The air curtain solenoid valve 5311 and the film-breaking solenoid valve 5321 are used to control the on / off of two parallel air paths, respectively.

[0107] When the second purging mechanism 5 is in the low position, the second purging mechanism 5 is in a vertical position. Each general air nozzle is inserted between the two flanges of the lower steel section 10 and is located above the web. The horizontal air curtain 5312 faces the lower web to achieve air curtain purging. The two inclined air curtains 5313 on the general air nozzle face the connection between the web and the two flanges of the steel section 10. At the same time, the two high-pressure nozzles 5322 integrated on the general air nozzle also face the connection between the web and the two flanges of the steel section 10 to disperse the residual water stains at the R-angle of the web. The high-pressure nozzles 5322 are located behind the inclined air curtains 5313.

[0108] Taking standard narrow-flange 400×150 steel as an example, the calculation uses three parameters: compressible adiabatic flow formula, flow rate, and impact force.

[0109] Formula for compressible adiabatic flow:

[0110]

[0111] Where, v: airflow velocity at the air knife outlet, in m / s; γ: air adiabatic index, taken as 1.4; R: gas constant, air is 287 J / (kg•K); T0: absolute temperature of the air source (K), taken as 293K (20℃) at room temperature; p0: absolute pressure of the air source, taken as 400000Pa; p: standard atmospheric pressure, taken as 101325Pa.

[0112] Mass flow rate formula:

[0113]

[0114] Where m: mass flow rate, unit: kg / s; ρ0: gas source density, unit: kg / m³ 3 ρ0 = p0 / (RT0), A: Cross-sectional area of ​​the air knife exit, in m² 2 .

[0115] Formula for calculating the impact force of the jet on the web:

[0116]

[0117] F: Impact force of the jet on the web, in N; Ma: Mach number, Ma = v / c, where c is the speed of sound (≈343m / s at room temperature).

[0118] Based on the calculation results, a flat air knife with a gap width of 1mm and a length of 420mm was selected. When the air source pressure was 0.5 MPa, the angle between the air knife and the web was 30~45°, and the standard flow rate was ≥ 2.0 Nm³ / min.

[0119] The parameters for the three air curtain openings—the first general air curtain unit 431, the first hot air curtain unit 432, and the second general air curtain unit 531—can all be selected according to the calculation process described above.

[0120] The primary function of the membrane-breaking unit 532 is to break up stubborn residual water stains in the radius (R) area of ​​the web of the H-beam. Compared to water curtain purging, it requires a larger flow rate within a smaller area under a certain pressure to ensure the water stains are broken up. Its high-pressure nozzle 5322 is a flat nozzle, designed for standard narrow-flange 400×150 steel sections, using a 1... 1 / 2PZ has a nozzle diameter of Φ25mm, a flow rate of 0.46 Nm³ / min at a pressure of 0.4Mpa, and an injection angle of 80°.

[0121] The experimental comparisons, taking into account purging speed, air curtain pressure, and angle, are shown in Table 1 below.

[0122]

[0123] Experimental results show that the purging system of this invention can achieve 0% removal of water accumulation on the web and water stains at the R-corners of H-beams at a production rate of 3 m / min; at a high-speed production rate of 5 m / min, the residual rates of water accumulation and water stains are only 3% and 5%, respectively, which is far superior to the traditional fixed purging system and can effectively prevent rust defects from occurring in finished profiles during storage and transportation.

[0124] Secondly, embodiments of the present invention provide a control method for a purging device for a rolled steel section 10, comprising the following steps:

[0125] The first pneumatic control system 43 of the first purging mechanism 4 is activated to form a first air curtain to block water accumulation on the web of the steel roll 10;

[0126] The second pneumatic control system 53 controls the second purging mechanism 5 to start, and controls the walking mechanism to drive the second purging mechanism 5 to move and purge along the length of the web plate.

[0127] During the purging process of the second purging mechanism 5, the first air control system 43 is periodically shut down to release the water blocked by the first air curtain.

[0128] The step of periodically shutting down the first pneumatic control system 43 includes:

[0129] After the second purging mechanism 5 starts moving and purging for a first preset time, the first pneumatic control system 43 is controlled to close for a second preset time, and then the first pneumatic control system 43 is turned on again.

[0130] Repeatedly execute the operation of turning off the second preset time and then turning it on again.

[0131] The control method of this invention further includes the following steps:

[0132] When the signal that the steel section 10 has completed the fixed-length sawing is detected, the first pneumatic control system 43 of the first blowing mechanism 4 is switched to generate hot air and the first blowing mechanism 4 is raised, so that the first blowing mechanism 4 is switched to the high position.

[0133] At the same time, the second general air curtain unit 531 of the second purging mechanism 5 is closed, and the membrane breaking unit 532 of the second purging mechanism 5 is opened.

[0134] The control method of this invention further includes the following static purging mode:

[0135] Control the first purging mechanism 4 and the second purging mechanism 5 to move and position them respectively to the preset positions of the steel section 10;

[0136] The hot air curtain unit of the first purging mechanism 4 and the second general air curtain unit 531 and the membrane breaking unit 532 of the second purging mechanism 5 are opened.

[0137] The control roller conveyor 8 transports the steel rolls 10 through a preset position.

[0138] The control method of this invention further includes the following moving purging mode:

[0139] Control the first purging mechanism 4 and the second purging mechanism 5 to rise;

[0140] The hot air curtain unit of the first purging mechanism 4, the second general air curtain unit 531 of the second purging mechanism 5, and the membrane breaking unit 532 are controlled to open.

[0141] The control walking mechanism synchronously drives the first blowing mechanism 4 and the second blowing mechanism 5 to move along the length direction of the stationary steel section 10.

[0142] The control method of this invention further includes a combined purging mode, which includes:

[0143] First, the fixed-length blowing process is performed: during the fixed-length sawing of the steel section 10, the first pneumatic control system 43 of the first blowing mechanism 4 is opened to block the water accumulation, and the second blowing mechanism 5 is moved to blow. At the same time, the first pneumatic control system 43 is periodically closed to release the water accumulation. After the sawing is completed, the first blowing mechanism 4 is raised and switched to generate hot air. At the same time, the film breaking unit 532 of the second blowing mechanism 5 is opened to perform hot air drying and film breaking blowing on the section.

[0144] Then, the roller conveyor purging process is executed: the first purging mechanism 4 and the second purging mechanism 5 are positioned, and the roller conveyor 8 is controlled to convey the steel section 10 through. During this process, the hot air curtain unit of the first purging mechanism 4 and the second general air curtain unit 531 and the film breaking unit 532 of the second purging mechanism 5 are kept open to purge the web of the moving section.

[0145] Finally, the purging process of the platform area is performed: after the steel section 10 stops at the collection platform 9, the first purging mechanism 4 and the second purging mechanism 5 are controlled to rise synchronously, and the traveling mechanism is controlled to drive them to move along the length direction of the steel section 10. At the same time, the hot air curtain unit, the second general air curtain unit 531 and the film breaking unit 532 are kept open to move and purge the web of the stationary steel section 10.

[0146] Specifically, the control method of this invention is based on the above-mentioned purging device. The PLC control system has a built-in fixed-length water blowing control unit, a fixed-length hot air control unit, a roller conveyor purging control unit, and a collection platform purging control unit. Each control unit consists of a subtraction function block (SUB), a multiplication function block (MUL), a delay function block (PDE), an AND function block (ANG), and an RS trigger function block (RSR) with priority to the reset terminal R. It can realize four working modes: fixed-length purging, roller conveyor purging, collection platform purging, and combined purging.

[0147] 6) For example Figure 8 As shown, SUB is the 'subtraction' function block, MUL is the 'multiplication' function block, PDE is the 'delay' function block, and RSR is the 'RS trigger with R priority' function block. This control system is a fixed-length blower control mode, consisting of two control units: function blocks DCCS100-DCCS110 constitute the fixed-length water blowing control unit, and DCRF21-DCRF23 constitute the fixed-length hot air control unit.

[0148] The fixed-length water blowing control unit calculates the moving distance of the first blowing mechanism 4 through the DCCS100 subtraction module, ensures the accurate position of the first blowing mechanism 4 through the DCCS101 multiplication module, and triggers the extension of the first lifting drive component 41. The first blowing mechanism 4 is in a low position, and the sawing signal triggers the general air solenoid valve 4311 and the air curtain solenoid valve 5311 to be energized. Through the DCCS108 delay module, after 1 second, it controls the second walking mechanism to drive the second blowing mechanism 5 to move towards the first blowing mechanism 4. Through the DCCS104 delay module, after 3 seconds, the general air solenoid valve 4311 is de-energized, and the water accumulated in the web of the H-beam is discharged through the hollow baffle of the first blowing mechanism 4. Through the DCCS106 delay module, after 1 second, the general air solenoid valve 4311 is energized, and the water is discharged in a periodic manner.

[0149] The fixed-length hot air control unit, the limit signal of the second traveling mechanism and the limit signal of the saw lifting are triggered by the DCRF21 trigger module, which simultaneously energizes the hot air solenoid valve 4321 and the gas heater 4322, and generates hot air at the outlet of the hot air curtain pipe 4323; at the same time, the first lifting drive component 41 is triggered to lift the first blowing mechanism 4, allowing the rolled piece to pass, triggering the de-energization of the general air solenoid valve 4311, the de-energization of the air curtain solenoid valve 5311, and the energization of the film breaking solenoid valve 5321; during the transfer of the rolled piece, the high-pressure nozzle 5322 blows to disperse the residual water stains, and generates hot air at the outlet of the hot air curtain pipe 4323 to dry the section steel rolled piece 10.

[0150] like Figure 9 As shown, the water blowing control program in the roller conveyor 8 area is used to run the steel section 10 on the roller conveyor 8. The first blowing mechanism 4 and the second blowing mechanism 5 are stationary in fixed positions to perform air curtain blowing, film breaking blowing and hot air drying operations on the web of the section.

[0151] The roller conveyor 8 area purging control unit consists of GDCS30-GDCS35 functional units, where ANG is an AND function block and RSR is an RS trigger function block with R priority for reset. The first purging mechanism 4 reaches the intermediate limit signal, the first lifting drive 41 lifts up signal, and the second lifting drive 51 lifts up signal, which trigger the GDCS30-35 functional blocks through the AND function block of GDCS30. This energizes the hot air solenoid valve 4321 and the gas heater 4322, and the generated hot air purifies the web of the running rolled piece. It also energizes the air curtain solenoid valve 5311 and the film breaking solenoid valve 5321, and the second general air curtain unit 531 and the high-pressure nozzle 5322 purify the web of the rolled piece.

[0152] like Figure 10As shown, in the water blowing control program of the collection platform area, the steel section 10 stops on the chain, and the first blowing mechanism 4 and the second blowing mechanism 5 simultaneously move from one end of the section to the other end of the section to blow it. The collection platform area blowing control unit consists of SJCS50-SJCS55 functional units, where ANG is an AND function block and RSR is an RS trigger with reset terminal R priority function block.

[0153] When the second purging mechanism 5 reaches the stop limit signal, the first lifting drive component 41 lifts up and the second lifting drive component 51 lifts up. Through SJCS50 and the function block, the SJCS50-55 function block is triggered, causing the first purging mechanism 4 and the second purging mechanism 5 to move synchronously to the other end of the rolling mill. This energizes the hot air solenoid valve 4321 and the gas heater 4322, and the generated hot air purifies the web of the running rolling mill. It also energizes the air curtain solenoid valve 5311 and the film breaking solenoid valve 5321, and the second general air curtain unit 531 and the high-pressure nozzle 5322 purify the web of the rolling mill.

[0154] In this embodiment of the invention, the first blowing mechanism 4 is designed with two working positions, two sets of water blowing systems, and two coordination modes. In mode one, the first blowing mechanism 4 is in a low position, which serves to block the rolled piece and fix its length. The outlet of the general air curtain pipe 4312 forms a 45° angle with the web of the lower steel rolled piece 10, thus preventing water accumulation on the web. In mode two, the first blowing mechanism 4 is in a high position. When the steel rolled piece 10 passes through, the outlet of the hot air curtain pipe 4323 is perpendicular to the web of the lower steel rolled piece 10, thus drying the remaining water stains with hot air.

[0155] In this embodiment of the invention, the second purging mechanism 5 is designed with two working positions, two sets of water blowing systems, and two coordination modes. In mode one, the second purging mechanism 5 is in a low position, the steel roll 10 is stationary, and the second purging mechanism 5 moves to purge, that is, the second traveling mechanism is controlled to drive the second purging mechanism 5 to move along the length of the web plate to perform moving purging. During the purging process, the horizontal air curtain opening 5312 of the second general air curtain unit 531 forms a 45° angle with the web plate of the steel roll 10, that is, the airflow of the horizontal air curtain opening 5312 blows obliquely downwards towards the web plate of the steel roll 10 below. At this time, the angle between the airflow direction of the horizontal air curtain opening 5312 and the top surface of the web plate of the steel roll 10 is 45°, which plays the role of draining water accumulated in the web plate. In mode two, the second blowing mechanism 5 is in a high position, the steel section 10 moves forward, the second blowing mechanism 5 is stationary, and it blows the steel section 10 below. The high-pressure nozzle 5322 of the film breaking unit 532 is aimed at the R-angle area of ​​the web of the steel section 10, and the high-pressure nozzle 5322 blows the R-angle area to break up the attached water stains and water film.

[0156] The above two sets of purging mechanisms have four cooperative modes, and they work together in the same way. In mode one, the first purging mechanism 4 and the second purging mechanism 5 work together. The first general air curtain unit 431 and the second general air curtain unit 531 block and blow at the same time. The second general air curtain unit 531 moves and blows continuously, while the first general air curtain unit 431 periodically blocks and releases. The timed release can use the pressure of accumulated water to quickly drain it out, and at the same time solve the problem of excessive water accumulation and overflow caused by long-distance purging. In mode two, the first purging mechanism 4 and the second purging mechanism 5 work together. After the film breaking unit 532 breaks up the water film attached to the R-corner area, the first hot air curtain unit 432 quickly dries the residual water stains on the steel roll 10, solving the technical problem that the water stains have strong adhesion and cannot be quickly blown away.

[0157] Specific working mode 1: Fixed length water blowing control mode. According to the fixed length, the first blowing mechanism 4 is moved to the required position, the first lifting drive component 41 extends, and pushes the first blowing mechanism 4 to rotate downward, so that the first blowing mechanism 4 switches to the low position. After the first blowing mechanism 4 is in the low position, the general air solenoid valve 4311 and the air curtain solenoid valve 5311 are energized, and the first blowing mechanism 4 starts blowing. After 1 second, the second traveling mechanism is controlled to drive the second blowing mechanism 5 to move towards the first blowing mechanism 4. After 3 seconds, the general air solenoid valve 4311 is de-energized, and the water accumulated on the web of the steel section 10 is discharged through the hollow baffle of the first blowing mechanism 4. After 1 second, the general air solenoid valve 4311 is energized again, and the water is discharged in a periodic manner.

[0158] When the limit signal of the second traveling mechanism and the limit signal of the saw lifting are triggered, the hot air solenoid valve 4321 and the gas heater 4322 are energized simultaneously to generate hot air; at the same time, the first lifting drive component 41 is triggered to lift the first blowing mechanism 4, the first blowing mechanism 4 switches to the high position, the rolled piece passes through, and the general air solenoid valve 4311 and the air curtain solenoid valve 5311 are de-energized and the film breaking solenoid valve 5321 is energized; during the transmission of the rolled piece, the high pressure nozzle 5322 disperses the residual water stains, and the air outlet of the hot air curtain pipe 4323 generates hot air to dry the steel rolled piece 10.

[0159] Specific working mode 2: Roller conveyor 8 transport water blowing control mode, the steel section 10 runs on the roller conveyor 8, the first blowing mechanism 4 runs to the middle limit signal, the first lifting drive component 41 lifts signal, the second lifting drive component 51 lifts signal triggers the hot air solenoid valve 4321 and the gas heater 4322 to be energized, and the generated hot air blows the web of the running section; the air curtain solenoid valve 5311 and the film breaking solenoid valve 5321 are energized, and the second general air curtain unit 531 and the high pressure nozzle 5322 blow the web of the section.

[0160] Specific working mode three: Water blowing mode in the collection platform area. The steel section 10 stops on the chain, and the first blowing mechanism 4 and the second blowing mechanism 5 move simultaneously from one end of the section to the other end. When the second blowing mechanism 5 reaches the stop limit signal, the first lifting drive 41 and the second lifting drive 51 lift signals trigger the first blowing mechanism 4 and the second blowing mechanism 5 to move synchronously to the other end of the section, energizing the hot air solenoid valve 4321 and the gas heater 4322. The generated hot air blows the web of the running section; energizing the air curtain solenoid valve 5311 and the film breaking solenoid valve 5321, the second general air curtain unit 531 and the high-pressure nozzle 5322 blow the web of the section.

[0161] Specific working mode four: fixed length blowing mode plus collection area blowing mode. If the front-end fixed length cutting and roller conveyor 8 process is short and the accumulated water cannot be completely blown away, the fixed length blowing control program can be superimposed with the collection area blowing program to ensure that the accumulated water and water stains are blown away clean.

[0162] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A purging device for rolled steel sections, characterized in that, include: A crossbeam (2) spans across the roller conveyor (8) that transports the rolled steel section (10); A traveling mechanism (3) is mounted on the crossbeam (2) and is capable of moving along the length of the crossbeam (2); and The first purging mechanism (4) and the second purging mechanism (5) are both connected to the walking mechanism (3); The first purging mechanism (4) includes a first pneumatic control system configured to blow airflow toward the steel section (10) to form a first air curtain; The second purging mechanism (5) includes a second air control system configured to blow airflow toward the web to form a second air curtain, and the second purging mechanism (5) is driven by the walking mechanism (3) to move along the length of the steel section (10).

2. The steel section rolling mill cleaning device according to claim 1, characterized in that, The first air control system includes a first general air curtain unit (431) and a first hot air curtain unit (432) arranged in parallel, and the first general air curtain unit (431) and the first hot air curtain unit (432) are connected to the first air inlet pipe; The first general wind curtain unit (431) is configured to form a first wind curtain to block water accumulation; The first hot air curtain unit (432) includes a gas heater (4322) for generating hot air to dry water stains.

3. The steel section rolling mill cleaning device according to claim 2, characterized in that, The air outlet of the first general wind curtain unit (431) forms an acute angle with the web of the rolled steel section (10); And / or, the air outlet of the first hot air curtain unit (432) is perpendicular to the web of the steel roll (10).

4. The steel section rolling mill cleaning device according to any one of claims 1 to 3, characterized in that, The second air control system includes a second general air curtain unit (531), which includes a horizontal air curtain opening (5312) and an inclined air curtain opening (5313). The horizontal air curtain opening (5312) is provided with inclined air curtain openings (5313) on both sides. The inclined air curtain openings (5313) are configured to blow out inclined airflow toward the connection between the web and the flange of the steel section (10).

5. The steel section rolling mill cleaning device according to any one of claims 1 to 4, characterized in that, The second pneumatic control system also includes a film breaking unit (532), the film breaking unit (532) and the second general air curtain unit (531) are connected to the second air inlet pipe, the film breaking unit (532) includes a high-pressure nozzle (5322), the spray direction of the high-pressure nozzle (5322) is toward the web of the steel section (10).

6. The steel section rolling mill cleaning device according to any one of claims 1 to 4, characterized in that, The first purging mechanism (4) further includes a first lifting drive (41) for driving the first pneumatic control system to lift relative to the steel section (10); When the first air control system’s water blowing bracket (42) is driven to a low position by the first lifting drive (41), it can serve as a positioning baffle for the steel roll (10).

7. A control method for a steel section rolling mill purging device as described in any one of claims 1-6, characterized in that, include: The first pneumatic control system of the first purging mechanism (4) is activated to form a first air curtain to block water accumulation on the web of the steel roll (10); The second pneumatic control system of the second blowing mechanism (5) is activated, and the walking mechanism (3) is controlled to drive the second blowing mechanism (5) to move and blow along the length of the web plate; During the purging process of the second purging mechanism (5), the first air control system is periodically shut down to release the water blocked by the first air curtain.

8. The control method according to claim 7, characterized in that, The step of controlling the first pneumatic control system to periodically shut down includes: After the second purging mechanism (5) starts to move and purge for a first preset time, the first pneumatic control system is controlled to shut down for a second preset time, and then the first pneumatic control system is turned on again. The operation of closing the second preset time and then turning it on is repeated cyclically.

9. The control method according to claim 7, characterized in that, It also includes the following steps: When the signal that the steel section (10) has completed the fixed-length sawing is detected, the first pneumatic control system of the first blowing mechanism (4) is switched to generate hot air and the first blowing mechanism (4) is raised. At the same time, the second general wind curtain unit of the second purging mechanism (5) is closed, and the membrane breaking unit (532) of the second purging mechanism (5) is opened.

10. The control method according to claim 7, characterized in that, It also includes the following static purge modes: Control the first purging mechanism (4) and the second purging mechanism (5) to move and position them respectively to the preset positions of the steel roll (10); The hot air curtain unit (432) of the first purging mechanism (4) and the second general air curtain unit and membrane breaking unit (532) of the second purging mechanism (5) are controlled to open; The roller conveyor (8) is controlled to transport the steel rolls (10) through the preset position.

11. The control method according to claim 7, characterized in that, It also includes the following mobile blowing modes: Control the first purging mechanism (4) and the second purging mechanism (5) to rise; The hot air curtain unit (432) of the first purging mechanism (4) and the second general air curtain unit and membrane breaking unit (532) of the second purging mechanism (5) are controlled to open; The walking mechanism (3) is controlled to synchronously drive the first blowing mechanism (4) and the second blowing mechanism (5) to move along the length direction of the stationary steel section (10).

12. The control method according to claim 7, characterized in that, It also includes a combined purging mode, which includes: First, the fixed-length blowing process is performed: during the fixed-length sawing of the steel section (10), the first pneumatic control system of the first blowing mechanism (4) is turned on to block the water accumulation, and the second blowing mechanism (5) is moved to blow. At the same time, the first pneumatic control system is periodically turned off to release the water accumulation. After the sawing is completed, the first blowing mechanism (4) is raised and switched to generate hot air. At the same time, the film breaking unit (532) of the second blowing mechanism (5) is turned on to dry the section with hot air and break the film. Then, the roller conveyor blowing process is performed: the first blowing mechanism (4) and the second blowing mechanism (5) are positioned, and the roller conveyor (8) is controlled to convey the steel section (10) through. During this process, the hot air curtain unit (432) of the first blowing mechanism (4) and the second general air curtain unit and the film breaking unit (532) of the second blowing mechanism (5) are kept open to blow the web of the moving section. Finally, the purging process of the platform area is performed: after the steel section (10) stops at the collection platform, the first purging mechanism (4) and the second purging mechanism (5) are controlled to rise synchronously, and the walking mechanism (3) is controlled to drive the two to move along the length direction of the steel section (10), while keeping the hot air curtain unit (432), the second general air curtain unit and the film breaking unit (532) open, and moving and purging the web of the stationary steel section (10).

Images