Anti-collision device for automatically purging iron oxide powder and purging method

Abstract

The invention relates to an anti-collision automatic iron oxide powder blowing device. The device comprises an anti-collision device, a lining plate, a hoisting hole, a device fixing bolt, an air pipe fixing pipe clamp, an electric control valve, a bypass hand valve, a spraying beam pipeline, an air blowing nozzle, a photoelectric switch and the like. The anti-collision unit is a push-pull type pickling unit, has single uncoiling and single coiling, multiple steel grades, high strength, large thickness and poor head and tail plate shapes, and can cause damage to a spray beam nozzle, so that an anti-collision design needs to be added. Wherein the iron oxide powder is a hot-rolled pickled plate (coil) oxide scale which is not uniform, a large amount of crushed iron oxide powder falls off from the surface of the strip steel after the scale is broken by a crease-resistant roller, the iron oxide powder is adhered to the roller surface of a straightening machine to generate surface indentations when passing through the straightening machine, the surface quality defect of the strip steel is caused, the waste reduction of a unit is increased, and the production cost is reduced. Product quality is affected, and dissatisfaction of customers is caused. By designing the anti-collision automatic iron oxide powder purging device, strip steel threading is automatically started through signal purging of the photoelectric switch, broken iron oxide powder falls off from the surface of the strip steel in time, cleanliness of the roller surface of a straightening machine is guaranteed, the indentation defect generated due to the fact that the iron oxide powder adheres to the roller surface of the straightening machine is eliminated, the product quality is improved, and the production efficiency is improved. And the requirements of customers are met.

Description

Technical Field

[0001] This invention relates to an anti-collision automatic iron oxide blowing device, belonging to the technical field of hot-rolled pickled plate (coil) production in thick plate pickling units. Background Technology

[0002] The Meigang thick plate pickling unit is a push-pull type pickling unit. A clamping straightener is installed after the inlet uncoiler and strip guide plate to correct the strip shape. During production, it was found that frequent indentation defects appeared on the strip surface, leading to product downgrading. Analysis revealed that the indentation defects were caused by uneven iron oxide scale on the hot-rolled coils, which, after passing through the anti-wrinkle rollers to break down the scale, resulted in a large amount of broken iron oxide powder falling off the strip surface. When passing through the straightener, this iron oxide powder adhered to the straightener roller surface, creating surface indentations. This required stopping the machine to grind the roller surface, severely impacting production rhythm, increasing the workload of on-site personnel, and seriously restricting the unit's capacity and quality improvement. Therefore, a new solution is urgently needed to address these technical problems. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by providing an anti-collision automatic iron oxide powder blowing device. This technical solution mainly solves the problem of iron oxide powder adhering to the surface of the straightening machine roller after passing through the anti-wrinkle roller for phosphorus breaking and causing surface indentation defects. It also solves the problem of abnormal downtime caused by abnormal wear and defects on the roller surface of the unit, thereby improving product quality and production stability.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: an anti-collision automatic iron oxide powder blowing device, the device comprising an anti-collision device, a liner, a lifting hole, device fixing bolts, air duct fixing clamps, an electric control valve, a bypass manual valve, a spray beam pipeline, a blowing nozzle, and a photoelectric switch.

[0005] The anti-collision device is installed immediately below the liner plate, and the electrically controlled valve is installed below the transmission side of the spray beam pipeline.

[0006] The spray beam pipeline is fixed above the opening and is connected to the main inlet compressed air pipeline. It is divided into a branch line and connected to the electric control valve and the blower nozzle. The distance between the pipeline and the opening is 10cm. The spray beam pipeline is fixed on both sides with air duct fixing clamps. The photoelectric switch is connected to the control end of the electric control valve and is used to power on the control end of the electric control valve by the photoelectric switch blocking signal.

[0007] The anti-collision device (1) is used in a push-pull pickling unit with single uncoiling and single winding. It handles a variety of steel grades, high strength, large thickness, and poor head and tail plate shape, which can damage the blower nozzles in the spray beam pipeline. Therefore, an anti-collision design is required. The iron oxide powder is caused by uneven iron oxide scale on hot-rolled pickled plates (coils). After passing through the anti-wrinkle rollers and undergoing phosphorus breaking action, a large amount of broken iron oxide powder falls off the strip surface. When passing through the straightener, the iron oxide powder adheres to the straightener roller surface, creating surface indentations and causing surface quality defects in the strip. This increases the scrap rate of the unit, affects product quality, and causes customer dissatisfaction. By designing an anti-collision automatic iron oxide powder blowing device, the strip head passes through a photoelectric switch. When the photoelectric signal on the HMI screen turns green, the electrically controlled valve automatically opens and conducts, and the blowing nozzles promptly blow out the broken iron oxide powder from the surface of the strip. The strip then passes through a straightener, ensuring the cleanliness of the straightener roller surface and eliminating indentation defects caused by iron oxide powder adhering to the straightener roller surface. When the unit enters the tail-swing mode, the strip tail detaches from the coiler via a photoelectric switch (light leakage), automatically stopping the signal, closing the electrically controlled valve, stopping the blowing, and ending the operation. This improves product quality, stabilizes production, and saves energy. The anti-collision device is an integral structure, fixed on both sides by bolts and installed at the inlet of the straightener's front clamping rollers, suitable for strip threading and tail-swing. The anti-collision device is designed with openings on both sides and the top for easy installation of the spray beam pipeline, blowing nozzles, and photoelectric switch, thereby improving blowing efficiency and achieving the blowing purpose.

[0008] As an improvement of the present invention, the anti-collision device is installed adjacent to the lower liner plate, and has holes on the working side and the transmission side. The holes are of equal length and correspondingly spaced, with a hole distance of 50cm in length and 25cm in width.

[0009] As an improvement of the present invention, the blowing nozzles are installed on the spray beam pipe, with a total of 8 nozzles, 4 on the operating side and 4 on the transmission side, which are connected by bolts and located above the opening. The nozzles are detachable.

[0010] As an improvement of the present invention, the photoelectric switch (10) is connected to the control end of the electric control valve (6) for the photoelectric switch (10) to block the light signal and the control end of the electric control valve (6) to be powered on. When the electric control valve (6) is turned on, the blower nozzle (9) automatically opens to blow out air, thereby achieving an automatic blowing effect; when the photoelectric switch (10) leaks light, the electric control valve (6) closes and the blowing stops.

[0011] As an improvement of the present invention, the photoelectric switch (10) is a diffuse reflection photoelectric switch, which is used to detect the strip distance and trigger the electrical control signal to control the opening and closing of the electrical control valve (6), so as to achieve the purpose of purging and save energy.

[0012] An anti-collision automatic purging method, the method comprising the following steps:

[0013] Step 1) Prepare for production, confirm the equipment status, automatically load the winding mechanism, and the winding is complete;

[0014] Step 2) The guide plate and the uncoiler pressure roller work in coordination to open the head of the steel coil;

[0015] Step 3) Press down the anti-wrinkle roller, assist the belt head in threading the strip, and feed the strip head into the clamping straightener;

[0016] Step 4) When the head passes through the photoelectric switch, the HMI screen displays a green photoelectric signal, indicating that the electronically controlled valve is activated and the nozzle automatically opens to blow out air;

[0017] Step 5) If the automatic signal is abnormal or the electric control valve is abnormal, open the bypass manual valve and manually open the pipeline nozzle to blow out air.

[0018] Step 6) When the unit enters the tail-spinning mode, the tail is detached from the winding machine via the photoelectric switch (light leakage), the automatic signal stops, the electronic control valve closes, the purging stops, and the operation ends.

[0019] Compared with existing technologies, this invention has the following advantages: the solution produces hot-rolled pickled plates (coils) with a thickness range of 2.0 to 12.7 mm and a maximum tensile strength of 1200 MPa, achieving stable production. This technical solution solves the quality problem of indentation defects caused by iron oxide powder adhering to the surface of the straightening machine rollers in existing hot-rolled plates (coils). By designing an anti-collision automatic iron oxide powder blowing device, the strip automatically opens the blowing function after passing through the strip through a photoelectric switch signal, promptly removing the broken iron oxide powder from the surface of the strip, ensuring the cleanliness of the straightening machine roller surface, improving product quality, and meeting customer needs.

[0020] 1) The cleaning and grinding of the roller surface of the straightener requires entering the process channel, which presents problems such as high operation risk, narrow space and long grinding time. This device solves the problem of foreign matter adhesion on the roller surface of the straightener and avoids the operation risk for operators.

[0021] 2) Using the device of the present invention, the operator can simply follow the above steps to thread the belt normally. At the same time, it fills the gap in this process and can achieve good social benefits. It is worthwhile to promote the use of this method in the same industry. Attached Figure Description

[0022] Figure 1 This is a production flow diagram of the pickling inlet section of a push-pull pickling unit.

[0023] Figure 2 This is a schematic diagram of the workflow of the present invention;

[0024] Figure 3 This is a schematic diagram of the installation of the anti-collision device of the present invention;

[0025] Figure 4This is a schematic diagram of the nozzle pipeline of the blower beam of the present invention;

[0026] In the diagram: 1. Anti-collision device, 2. Liner plate, 3. Lifting hole, 4. Device fixing bolt, 5. Air duct fixing clamp, 6. Electric control valve, 7. Bypass manual valve, 8. Spray beam pipeline, 9. Air blower nozzle, 10. Photoelectric switch. Detailed Implementation

[0027] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0028] Example 1: See Figures 1-4 An anti-collision automatic iron oxide powder blowing device is described, comprising an anti-collision device (1), a liner (2), a lifting hole (3), device fixing bolts (4), a duct fixing clamp (5), an electric control valve (6), a bypass hand valve (7), a spray beam pipeline (8), a blowing nozzle (9), a photoelectric switch (10), etc. The anti-collision device (1) is used in a push-pull pickling unit with single uncoiling and single winding. The unit has many steel grades, high strength, large thickness, and poor head and tail plate shape, which may cause damage to the spray beam pipeline (8) and the blowing nozzle (9). Therefore, an anti-collision design is required. The iron oxide powder is caused by uneven iron oxide scale of hot-rolled pickled plate (coil). After the anti-wrinkle roller breaks the phosphorus, a large amount of broken iron oxide powder falls off the surface of the strip steel. When passing through the straightener, the iron oxide powder adheres to the straightener roller surface and produces surface indentations, causing surface quality defects of the strip steel, increasing the scrap rate of the unit, affecting product quality, and causing customer dissatisfaction. By designing an anti-collision automatic iron oxide powder blowing device, the strip head passes through a photoelectric switch (10), and the HMI screen displays a green photoelectric signal. The electric control valve (6) automatically opens and conducts, and the blowing nozzle (9) blows out air to promptly remove the broken iron oxide powder from the surface of the strip. Then, it passes through the straightener to ensure the cleanliness of the straightener roller surface, eliminating the indentation defects caused by iron oxide powder adhering to the straightener roller surface. When the unit enters the tail-swing mode, the strip tail detaches from the coiler and passes through the photoelectric switch (10) (light leakage), the automatic signal stops, the electric control valve (6) closes, the blowing stops, and the operation ends. This improves product quality, stabilizes production, and saves energy. The anti-collision device (1) is an integral structure, and is installed at the inlet of the straightener front clamping roller by fixing bolts (4) on both sides. It is suitable for the tail-swing of the strip. The anti-collision device (1) is designed with openings on both sides and an opening at the top to facilitate the installation of the spray beam pipeline (8), the blowing nozzle (9), and the photoelectric switch (10), thereby improving the blowing efficiency and achieving the blowing purpose.

[0029] The anti-collision device (1) is installed adjacent to the lower liner (2), and has openings on the working side and the transmission side at appropriate positions. The openings are of equal length and correspondingly spaced, with a length of 50cm and a width of 25cm.

[0030] The spray beam pipeline (8) is fixed above the opening. The spray beam pipeline (8) is connected to the main inlet compressed air pipeline and splits into a branch. The valve of the electric control valve (6) is connected to the blower nozzle (9). The distance between the pipeline and the opening is 10cm. The spray beam pipeline (8) is fixed on both sides by bolts and pipe clamps (5).

[0031] The blower nozzles (9) are installed on the spray beam pipe (8), with a total of 8 nozzles, 4 on the operating side and 4 on the transmission side. They are connected by bolts and located above the opening. The nozzles are detachable.

[0032] The electric control valve (6) is installed below the transmission side of the spray beam pipeline (8). According to the connection between the photoelectric switch (10) and the control end of the electric control valve (6), the control end of the electric control valve (6) is powered on by the photoelectric switch (10) blocking the light signal. When the control end of the electric control valve (6) is powered on, the electric control valve (6) is turned on, and the blower nozzle (9) automatically opens to blow out air, thereby achieving an automatic purging effect; when the photoelectric switch (10) leaks light, the electric control valve (6) closes and the purging is stopped.

[0033] The photoelectric switch (10) is a diffuse reflection photoelectric switch, which is used to detect the distance of the strip steel and trigger the electrical control signal to control the opening and closing of the electrical control valve (6), so as to achieve the purpose of purging and save energy.

[0034] Example 2: See Figures 1-4 A method for an anti-collision automatic purging iron oxide powder device, the method comprising the following steps:

[0035] Step 1) Prepare for production, confirm the equipment status, automatically load the winding mechanism, and the winding is complete;

[0036] Step 2) The guide plate and the uncoiler pressure roller work in coordination to open the head of the steel coil;

[0037] Step 3) Press down the anti-wrinkle roller, assist the strip head to thread the strip, and feed the strip head into the front pinch roller of the straightener through the anti-collision device (1);

[0038] Step 4) When the head passes through the photoelectric switch (10), the HMI screen displays a green photoelectric signal, the electric control valve (6) automatically opens and conducts, and the blower nozzle (9) blows out air;

[0039] Step 5) If the automatic signal is abnormal, the electric control valve (6) is abnormal, open the bypass manual valve (7) and manually open the pipeline blower nozzle (9) to blow out air;

[0040] Step 6) When the unit enters the tail-spinning mode, the tail is detached from the winding machine through the photoelectric switch (10) (light leakage), the automatic signal stops, the electric control valve (6) closes, the purging stops, and the operation ends.

[0041] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A collision-resistant automatic iron oxide powder blowing device, characterized in that, The device includes an anti-collision device (1), a liner (2), a duct fixing clamp (5), an electric control valve (6), a bypass hand valve (7), a spray beam pipeline (8), a blower nozzle (9), a photoelectric switch (10), and an opening (11). The anti-collision device (1) is installed next to the liner plate (2) below. The electric control valve (6) is installed below the transmission side of the spray beam pipe (8). The spray beam pipe (8) is fixed above the opening (11). The spray beam pipe (8) is connected to the main inlet compressed air pipe and splits into a branch. The valve of the electric control valve (6) is connected to the blower nozzle (9). The distance between the spray beam pipe (8) and the opening (11) is 10cm. The spray beam pipe (8) is fixed on both sides by air duct fixing clamps (5). The photoelectric switch (10) is connected to the control end of the electric control valve (6) for powering on the control end of the electric control valve (6) with the light shielding signal of the photoelectric switch (10).

2. The anti-collision automatic iron oxide powder blowing device according to claim 1, characterized in that, The anti-collision device (1) is installed next to the liner plate (2) below, and has holes on the working side and the transmission side. The holes are of equal length and the spacing is corresponding. The distance between the holes is 50cm in length and 25cm in width.

3. The anti-collision automatic iron oxide powder blowing device according to claim 3, characterized in that, The blower nozzles (9) are installed on the spray beam pipe (8). There are a total of 8 nozzles, 4 on the operating side and 4 on the transmission side. They are connected by bolts and located above the opening. The nozzles are detachable.

4. The anti-collision automatic iron oxide powder blowing device according to claim 3, characterized in that, The photoelectric switch (10) is connected to the control end of the electric control valve (6) for the photoelectric switch (10) to block the light signal. When the control end of the electric control valve (6) is powered on, the electric control valve (6) is turned on, and the blower nozzle (9) automatically opens to blow out air, thereby achieving an automatic purging effect; when the photoelectric switch (10) leaks light, the electric control valve (6) closes and the purging stops.

5. The anti-collision automatic iron oxide powder blowing device according to claim 4, characterized in that, The photoelectric switch (10) is a diffuse reflection photoelectric switch, used to detect the strip distance and trigger the electrical control signal to control the opening of the electrical control valve (6).

6. A collision-avoidance automatic purging method, characterized in that, The anti-collision automatic iron oxide powder blowing device according to any one of claims 1-6 is characterized in that the method includes the following steps: Step 1) Prepare for production, confirm the equipment status, automatically load the winding mechanism, and once winding is complete, Step 2) The guide plate and the uncoiler pressure roller work in coordination to open the head of the steel coil. Step 3) Press down the anti-wrinkle roller, assist the strip head in threading the strip, and feed the strip head into the front pinch roller of the straightener through the anti-collision device (1). Step 4) When the head passes through the photoelectric switch (10), the HMI screen displays a green photoelectric signal, the electric control valve (6) automatically opens, and the blower nozzle (9) blows out air. Step 5) If the automatic signal is abnormal, the electric control valve (6) is abnormal. Open the bypass manual valve (7) and manually open the pipeline blower nozzle (9) to blow out air. Step 6) When the unit enters the tail-spinning mode, the tail is detached from the winding machine through the photoelectric switch (10) (light leakage), the automatic signal stops, the electric control valve (6) closes, the purging stops, and the operation ends.

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