Quenching machine outlet self-adapting steel plate thickness purging device

Abstract

The application discloses a quenching machine outlet self-adapting steel plate thickness blowing device, which comprises a steel plate upper surface blowing device and a steel plate lower surface blowing device; the upper surface blowing device comprises a supporting shaft, a guide wheel sleeved on the supporting shaft, self-adapting height adjusting devices installed at both ends of the supporting shaft and an upper surface blowing unit hung on the supporting shaft; each self-adapting height adjusting device comprises a base, a supporting rod and an adjusting nut sleeved on a threaded section in the middle of the supporting rod; the upper end of the supporting rod is fixed to the end of the supporting shaft, and the lower end of the supporting rod is inserted into a guide sleeve of the base; a compression spring is installed on the supporting rod and located between the adjusting nut and the guide sleeve of the base. The device can adapt to the change of the steel plate shape or thickness, dynamically adjust the blowing flow size, perform close-range and high-efficiency blowing on the upper and lower surfaces of the steel plate, improve the blowing effect and efficiency, reduce the energy consumption cost of drying and other processes and guarantee the product surface quality.

Description

Technical Field

[0001] This invention belongs to the field of steel plate heat treatment production technology in the metallurgical industry, and specifically relates to a purging device that adapts to the thickness of the steel plate at the outlet of a quenching machine. Background Technology

[0002] After steel plates produced by steel companies undergo water-cooled quenching, residual water stains on the surface make them prone to rusting. Therefore, hot air dryers are needed to dry both the top and bottom surfaces of the steel plates. Current drying methods involve blowing hot air onto the steel plate surface. However, due to the wide variation in steel plate thickness and the warping deformation after quenching, the high-temperature airflow nozzle is typically kept at a vertical distance of about 200mm from the steel plate surface to prevent collisions. This long blowing distance results in poor drying performance. To avoid affecting product surface quality, high-flow-rate, constant-pressure airflow is used, leading to high energy consumption. Summary of the Invention

[0003] The present invention aims to overcome the above-mentioned technical problems and provide a purging device for quenching machine outlet that adapts to the thickness of steel plate. It can adapt to changes in the shape or thickness of the steel plate, perform close-range and efficient purging of the steel plate surface, avoid collision with the nozzle, and reduce energy consumption costs in processes such as drying.

[0004] To achieve the above objectives, the present invention provides a purging device for adaptive steel plate thickness at the outlet of a quenching machine, comprising a purging device for the upper surface of the steel plate and a purging device for the lower surface of the steel plate; the upper surface purging device includes a support shaft, a guide wheel sleeved on the support shaft, adaptive height adjustment devices installed at both ends of the support shaft, and an upper surface purging unit suspended on the support shaft; each adaptive height adjustment device includes a base, a support rod, and an adjusting nut sleeved on the middle threaded section of the support rod; the upper end of the support rod is fixed to the end of the support shaft, and the lower end of the support rod is inserted into the guide sleeve of the base; a compression spring is installed on the support rod and located between the adjusting nut and the guide sleeve of the base.

[0005] Furthermore, the upper surface purging unit includes an upper spray pipe and two support beams symmetrically installed on both sides of the upper spray pipe. The two support beams are symmetrically fixed on both sides of the support shaft. The nozzle of the upper spray pipe is located above the lower rim of the guide wheel.

[0006] Furthermore, the lower surface blowing device includes multiple lower roller conveyors arranged side by side and evenly spaced. A collision-resistant partition is arranged between each pair of adjacent lower roller conveyors. One of the collision-resistant partitions has an axially penetrating mounting groove on its upper surface along the axial direction of the support shaft, through which the lower spray pipe is inserted. The upper surface of the collision-resistant partition is flush with the horizontal plane where the upper roller rim of the lower roller conveyor is located.

[0007] Furthermore, the vertical gap between the lower rim of the guide wheel and the upper rim of the lower roller conveyor is approximately the minimum thickness of the steel plate.

[0008] Furthermore, the support shaft is equipped with a speed sensor for dynamically testing the rotational speed of the guide wheel.

[0009] Furthermore, the inner and outer rings of the guide wheel are supported by three spokes, and a bearing for the support shaft to pass through is arranged at the center of the inner ring.

[0010] Furthermore, the outer diameter of the guide wheel is 320~400mm.

[0011] Furthermore, the nozzle of the lower spray pipe is located 3-5 mm below the plane of the upper roller rim of the lower roller conveyor.

[0012] Furthermore, the upper spray pipe is a planar slit nozzle, and the upper spray pipe is connected to an electronically controlled valve with adjustable flow rate.

[0013] Furthermore, the lower spray pipe is a planar slit nozzle, and the lower spray pipe is connected to an electrically controlled valve with adjustable flow rate.

[0014] Compared with existing technologies, the advantages of this invention are as follows: The upper nozzle is connected to the support rod via a beam. Under the pre-compression force of the compression spring, the guide wheel and the lower roller conveyor maintain a certain initial gap, allowing steel plates deformed during quenching or of different thicknesses to enter between the guide wheel and the lower roller conveyor. When the guide wheel acts on the upper surface of the steel plate, it can adaptively adjust the vertical distance between the lower nozzle and the upper surface of the steel plate. Anti-collision baffles installed between the lower roller conveyors prevent the steel plate from colliding with the lower nozzle. Under the action of the guide wheel and the anti-collision baffles, the purging device can adaptively adjust the blowing flow rate according to changes in the shape or thickness of the steel plate, performing close-range, efficient purging of the upper and lower surfaces of the steel plate, improving purging effect and efficiency, reducing energy consumption costs in processes such as drying, and ensuring product surface quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the purging device for adaptive steel plate thickness at the outlet of the quenching machine according to the present invention. Figure 2 for Figure 1 AA cross-section view; Figure 3 for Figure 1 Schematic diagram of the guide wheel and support shaft structure; Figure 4 for Figure 1 Schematic diagram of the adaptive height adjustment device.

[0016] In the diagram: 1. Guide wheel; 2. Support shaft; 3. Speed ​​sensor; 4. Support rod; 5. Adjusting nut; 6. Compression spring; 7. Base; 8. Support beam; 9. Upper spray pipe; 10. Anti-collision partition; 11. Lower spray pipe; 12. Lower roller conveyor; 13. Steel plate; 14. Guide sleeve. Detailed Implementation

[0017] The invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 , Figure 2 , Figure 3 The quenching machine outlet adaptive steel plate thickness blowing device shown includes an upper surface blowing device and a lower surface blowing device for the steel plate 13. The upper surface blowing device includes a support shaft 2, a guide wheel 1 sleeved on the support shaft 2, adaptive height adjustment devices installed at both ends of the support shaft 2, and an upper surface blowing unit suspended on the support shaft 2. The inner and outer rings of the guide wheel 1 are supported by three spokes, thereby reducing the weight of the guide wheel 1; a bearing for the support shaft 2 to pass through is arranged at the center of the inner ring; in this embodiment, according to the hot-rolled product outline, the outer ring diameter is selected as 320~400mm. A larger outer ring diameter is beneficial for guiding the steel plate 13 and preventing the steel plate 13 from warping and jamming while running on the lower roller table.

[0019] The center of the cylindrical section of the support shaft 2 is assembled with the inner ring bearing of the guide wheel 1, which supports the guide wheel 1; the support shaft 2 is equipped with a speed sensor 3, which is used to dynamically test the speed of the guide wheel 1.

[0020] The upper surface purging unit includes an upper nozzle 9 and two support beams 8 symmetrically mounted on both sides of the upper nozzle 9. The two support beams 8 are symmetrically fixed on both sides of the support shaft 2. In this embodiment, the support beams 8 are made of hollow aluminum alloy tubes to reduce their weight. The nozzle of the upper nozzle 9 is located above the lower rim of the guide wheel 1.

[0021] Combination Figure 4 Each adaptive height adjustment device shown includes a base 7, a support rod 4, and an adjusting nut 5 fitted onto the threaded section in the middle of the support rod 4. The upper end of the support rod 4 is fixed to the end of the support shaft 2, and the lower end of the support rod 4 is inserted into the guide sleeve 14 of the base 7, allowing it to move up and down along the guide sleeve 14. A compression spring 6 is installed on the support rod 4 between the adjusting nut 5 and the guide sleeve 14 of the base 7. The compression spring 6 is compressed under the weight of the guide wheel 1, support shaft 2, support rod 4, support beam 8, and upper spray pipe 9. Adjusting the position of the adjusting nut 5 on the support rod 4 adjusts the pre-compression force of the compression spring 6. Under the pre-compression force of the compression spring 6, the support rod 4 can move upward along the guide sleeve 14 of the base 7, and the guide wheel 1 can adjust its vertical height synchronously with the support rod 4. In this embodiment, the vertical gap between the lower rim of the guide wheel 1 and the upper rim of the lower roller conveyor 12 is approximately the minimum thickness of the steel plate.

[0022] The lower surface purging device includes multiple lower roller conveyors 12 arranged side by side and evenly spaced. A collision-resistant partition 10 is arranged between each pair of adjacent lower roller conveyors 12. One of the collision-resistant partitions 10 has an axially penetrating mounting groove on its upper surface along the axial direction of the support shaft 2, through which both sides of the partition are axially inserted. A lower spray pipe 11 is inserted into the mounting groove. The upper surface of the collision-resistant partition 10 is flush with the horizontal plane of the upper roller rim of the lower roller conveyor 12. The nozzle of the lower spray pipe 11 is located 3-5 mm below the plane of the upper roller rim of the lower roller conveyor 12.

[0023] Both the upper nozzle 9 and the lower nozzle 11 are planar slit nozzles. The upper nozzle 9 and the lower nozzle 11 are respectively connected to an adjustable flow rate electronically controlled valve. The flow rate of the upper nozzle 9 and the lower nozzle 11 is controlled by the electronically controlled valve, and the flow rate is positively correlated with the running speed of the steel plate 13 on the lower roller conveyor 12.

[0024] After being quenched in a water quenching machine, the steel plate may undergo some deformation. Under the action of the quenching machine's pinch rollers, the steel plate enters the gap between the guide wheel and the lower roller conveyor. When the steel plate tilts upwards or its thickness exceeds the initial gap between the guide wheel and the upper roller flange of the lower roller conveyor, the guide wheel, under the action of the steel plate's inertia and the guide sleeve, acts on the upper surface of the steel plate, adapting to the change in plate shape and rotating closely against the upper surface. The support beam and upper nozzle follow the guide wheel, maintaining synchronization with the upper surface of the steel plate to ensure a fixed distance between the nozzle and the upper surface. When the steel plate tilts upwards on the lower roller conveyor, it will not get stuck below the lower roller conveyor due to the action of the anti-collision baffle, avoiding collision with the lower nozzle.

[0025] In this invention, the upper nozzle is connected to the support rod via a beam. Under the pre-compression force of the compression spring, the guide wheel and the lower roller conveyor maintain a certain initial gap, allowing steel plates deformed during quenching or of different thicknesses to enter between the guide wheel and the lower roller conveyor. When the guide wheel acts on the upper surface of the steel plate, it can adaptively adjust the vertical distance between the lower nozzle and the upper surface of the steel plate. Anti-collision baffles installed between the lower roller conveyors prevent the steel plate from colliding with the lower nozzle. Under the action of the guide wheel and the anti-collision baffles, the purging device can adaptively adjust the spray flow rate according to changes in the shape or thickness of the steel plate, performing close-range, efficient purging of the upper and lower surfaces of the steel plate, improving purging effect and efficiency, reducing energy consumption costs in processes such as drying, and ensuring product surface quality.

[0026] The adjustment method for the purging device at the outlet of the quenching machine that adapts to the thickness of the steel plate is as follows: The pre-compression force of the compression spring 6 is adjusted by adjusting the position of the nut 5 on the support rod 4. The pre-compression force of the compression spring 6 overcomes the gravity of the guide wheel 1, support shaft 2, support rod 4, support beam 8 and upper spray pipe 9, so that the guide wheel 1, support shaft 2, support rod 4, support beam 8 and upper spray pipe 9 maintain a free balance state, and maintain the initial gap value between the lower wheel rim of the guide wheel 1 supported by the support rod 4 and the upper roller rim of the lower roller conveyor 12.

[0027] After the steel plate 13 is quenched by the water quenching machine, water stains remain on its upper and lower surfaces, and the plate shape may undergo some deformation. Under the action of the clamping rollers of the quenching machine, the steel plate 13 enters the gap between the guide wheel 1 and the lower roller table 12. When the steel plate 13 tilts upwards or its thickness exceeds the initial gap between the guide wheel 1 and the upper roller flange of the lower roller table 12, the guide wheel 1 acts on the upper surface of the steel plate, rotating closely against the upper surface of the steel plate 13. Under the action of the inertial force of the steel plate 13 and the guide sleeve 14, the guide wheel 1 adapts to the change in the shape of the steel plate in the vertical direction. The support beam 8 and the upper spray pipe 9 move up and down synchronously with the guide wheel 1. The nozzle of the upper spray pipe 9 is kept within a distance of less than 13mm from the upper surface of the steel plate 13 to ensure efficient purging.

[0028] When the thickness of steel plate 13 is 0.2~3mm and the running speed of lower roller conveyor 12 is 25~40m / min, the initial gap between the lower rim of the guide wheel 1 supported by support rod 4 and the upper rim of the lower roller conveyor 12 is adjusted to 3mm to avoid or reduce the force exerted by guide wheel 1 on thin steel plate 13. Because steel plate 13 is relatively thin and has a fast quenching speed, the required spray flow rate of upper nozzle 9 and lower nozzle 11 is higher. The upper nozzle 9 and lower nozzle 11 adopt a high-flow-rate spraying mode, with the flow rates set to 145 and 160 Nm³, respectively. 3 / min.

[0029] When the thickness of the steel plate 13 is 4~12mm and the running speed of the roller conveyor 12 is 13~24m / min, the initial gap between the lower rim of the guide wheel 1 supported by the support rod 4 and the upper rim of the lower roller conveyor 12 is adjusted to 3.5mm. The spray flow rate of the upper spray pipe 9 and the lower spray pipe 11 is controlled by an electronically controlled valve. The flow rate is positively correlated with the running speed of the steel plate 13 on the roller conveyor. After the speed sensor 3 measures the speed of the guide wheel 1, it feeds the signal back to the electronically controlled valve to control the spray flow rate of the upper spray pipe 9 and the lower spray pipe 11. Generally, the flow rates of the upper spray pipe 9 and the lower spray pipe 11 are set at 110~150Nm. 3 Within the range of / min, and the upper nozzle flow rate is greater than the lower nozzle flow rate by 10 Nm 3 / min.

[0030] When the thickness of the steel plate 13 is 12~25mm and the running speed of the roller conveyor 12 is 3.5~13m / min, the initial gap between the lower rim of the guide wheel 1 supported by the support rod 4 and the upper rim of the lower roller conveyor 12 is adjusted to 10mm. The spray flow rate of the upper spray pipe 9 and the lower spray pipe 11 is controlled by an electronically controlled valve. The flow rate is positively correlated with the running speed of the steel plate 13 on the roller conveyor. After the speed sensor 3 measures the speed of the guide wheel 1, it feeds the signal back to the electronically controlled valve to control the spray flow rate of the upper spray pipe 9 and the lower spray pipe 11. The spray flow rate of the upper spray pipe 9 and the lower spray pipe 11 is controlled by the electronically controlled valve, and the flow rates of the upper spray pipe 9 and the lower spray pipe 11 are respectively 90~120Nm³. 3 The flow rate is positively correlated with the running speed of the steel plate 13 on the roller conveyor, with the upper nozzle having a larger flow rate and the lower nozzle having a flow rate of 5 Nm³. 3 / min.

Claims

1. A purging device for adaptive steel plate thickness at the outlet of a quenching machine, characterized in that: The device includes a cleaning device for the upper surface of the steel plate (13) and a cleaning device for the lower surface of the steel plate (13). The upper surface cleaning device includes a support shaft (2), a guide wheel (1) sleeved on the support shaft (2), an adaptive height adjustment device installed at both ends of the support shaft (2), and an upper surface cleaning unit suspended on the support shaft (2). Each adaptive height adjustment device includes a base (7), a support rod (4), and an adjusting nut (5) sleeved on the middle threaded section of the support rod (4). The upper end of the support rod (4) is fixed to the end of the support shaft (2). (4) The lower end is inserted into the guide sleeve (14) of the base (7); a compression spring (6) is installed on the support rod (4) and between the adjusting nut (5) and the guide sleeve (14) of the base (7); the upper surface blowing unit includes an upper spray pipe (9) and support beams (8) symmetrically installed on both sides of the upper spray pipe (9), and the two support beams (8) are symmetrically fixed on both sides of the support shaft (2); the nozzle of the upper spray pipe (9) is located above the lower rim of the guide wheel (1), and the nozzle of the upper spray pipe (9) is kept within a distance of less than 13 mm from the upper surface of the steel plate; The lower surface blowing device includes multiple parallel and evenly spaced lower roller conveyors (12), with anti-collision partitions (10) arranged between each pair of adjacent lower roller conveyors (12). One of the anti-collision partitions (10) has an axially penetrating mounting groove on its upper surface along the axial direction of the support shaft (2), through which the lower spray pipe (11) is inserted. The upper surface of the anti-collision partition (10) is flush with the horizontal plane where the upper roller rim of the lower roller conveyor (12) is located. The vertical gap between the lower rim of the guide wheel (1) and the upper roller rim of the lower roller conveyor (12) is approximately the minimum thickness of the steel plate. The pre-compression force of the compression spring (6) is adjusted by adjusting the position of the nut (5) on the support rod (4). The pre-compression force of the compression spring (6) overcomes the gravity of the guide wheel (1), support shaft (2), support rod (4), support beam (8) and upper nozzle (9), so that the guide wheel (1), support shaft (2), support rod (4), support beam (8) and upper nozzle (9) maintain a free balance state, and the support rod (4) supports the lower rim of the guide wheel (1) and the upper rim of the lower roller conveyor (12) maintains the initial gap value.

2. The purging device for adaptive steel plate thickness at the outlet of the quenching machine according to claim 1, characterized in that: The support shaft (2) is equipped with a speed sensor (3) for dynamically testing the rotational speed of the guide wheel (1).

3. The purging device for adaptive steel plate thickness at the outlet of the quenching machine according to claim 1, characterized in that: The inner and outer rings of the guide wheel (1) are supported by three spokes, and a bearing for the support shaft (2) to pass through is arranged at the center of the inner ring.

4. The purging device for adaptive steel plate thickness at the outlet of the quenching machine according to claim 1, characterized in that: The outer diameter of the guide wheel (1) is 320~400mm.

5. The purging device for adaptive steel plate thickness at the outlet of the quenching machine according to claim 1, characterized in that: The nozzle of the lower spray pipe (11) is located 3-5 mm below the plane of the upper roller rim of the lower roller conveyor (12).

6. The purging device for adaptive steel plate thickness at the outlet of the quenching machine according to claim 1, characterized in that: The upper spray pipe (9) is a planar slit nozzle, and the upper spray pipe (9) is connected to an electronically controlled valve with adjustable flow rate.

7. The purging device for adaptive steel plate thickness at the outlet of the quenching machine according to claim 1, characterized in that: The lower nozzle (11) is a planar slit nozzle, and the lower nozzle (11) is connected to an electrically controlled valve with adjustable flow rate.

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