A gear steel weak cooling device to improve the pass rate of flaw detection

Abstract

This utility model relates to the field of cooling equipment, specifically to a gear steel slow cooling device for improving the flaw detection pass rate. The device includes a frame located at the outlet of the crystallizer. Multiple cooling units are spaced apart on the frame. Each cooling unit includes four telescopic rods, adjacent rods being perpendicular to each other. Spray nozzles are connected to the ends of the telescopic rods, and each nozzle is connected to a flexible metal hose. A main water supply pipe is mounted on the frame, connected to a water supply unit. Multiple branch pipes are installed on the main water supply pipe, each corresponding to a cooling unit. Each branch pipe is equipped with an electrically controlled valve and connected to its corresponding flexible metal hose. Multiple infrared temperature sensors are spaced apart on the frame. This utility model regulates the cooling rate of the gear steel continuous casting billet, allowing for slow cooling, reducing internal stress, minimizing cracks, and improving the flaw detection pass rate.

Description

Technical Field

[0001] This utility model relates to the field of cooling equipment, specifically to a gear steel weak cooling device for improving the pass rate of flaw detection. Background Technology

[0002] Gear steel is a key material for manufacturing gears and is widely used in automobiles, machinery, aerospace and other fields. It has high strength and toughness, wear resistance and good heat treatment performance. However, gear steel may produce defects such as cracks, inclusions and porosity during smelting, forging or heat treatment. Therefore, flaw detection of gear steel is a key link to ensure its quality and safety. In order to improve the pass rate of flaw detection of gear steel, protective slag is often added to the molten steel in continuous casting during the smelting process. The protective slag can quickly form a liquid slag layer, a sintered layer and a solid slag layer, uniformly covering the surface of the molten steel, isolating air and avoiding the formation of oxide inclusions caused by contact between molten steel and oxygen. However, the existing cooling mechanism cools the steel output from the crystallizer too quickly. When the temperature difference between the surface and the core of the billet exceeds 180°C due to rapid cooling, thermal stress can easily cause longitudinal cracks. Therefore, it is necessary to design a gear steel weak cooling device to improve the pass rate of flaw detection. Summary of the Invention

[0003] The purpose of this utility model is to provide a gear steel weak cooling device to improve the pass rate of flaw detection, which has the advantage of improving the pass rate of flaw detection.

[0004] The technical solution adopted is as follows:

[0005] A gear steel weak cooling device for improving flaw detection pass rate includes a frame located at the outlet of a crystallizer. Multiple cooling units are spaced apart on the frame. Each cooling unit includes four telescopic rods, adjacent rods being perpendicular to each other. Spray nozzles are connected to the ends of the telescopic rods, and each nozzle is connected to a flexible metal hose. A main water supply pipe is mounted on the frame, connected to a water supply unit. The main water supply pipe has multiple branch pipes, each corresponding to a cooling unit. Electrically controlled valves are installed on the branch pipes, and each branch pipe is connected to its corresponding flexible metal hose. Multiple infrared temperature sensors are spaced apart on the frame.

[0006] Preferably, the telescopic rod includes a hydraulic telescopic cylinder and a heat insulation sleeve. The two ends of the hydraulic telescopic cylinder are respectively connected to the frame and the heat insulation sleeve, and the heat insulation sleeve is connected to the nozzle.

[0007] Preferably, the heat insulation sleeve includes a metal tube with one end open, and the outside of the metal tube is provided with a high thermal resistance asbestos material.

[0008] Preferably, a turbine flow sensor is installed on each of the branch pipes.

[0009] Preferably, the water supply unit includes a water supply tank, a variable frequency pump is installed in the water supply tank, and the variable frequency pump is provided with an output pipe connected to the main water supply pipe.

[0010] Compared to existing technologies, the advantages are:

[0011] 1. This utility model uses data from infrared temperature sensors installed at various locations on the frame to control the electrical control valves and water supply unit to regulate the water volume of each nozzle, thereby regulating the cooling rate of the gear steel continuous casting billet, allowing the continuous casting billet to cool slowly, reducing internal stress, reducing cracks, and thus improving the flaw detection pass rate.

[0012] 2. This utility model addresses the problem of varying water mist coverage areas due to different nozzle water volumes by adjusting the distance between the nozzle and the continuous casting billet, ensuring that the water mist completely covers the continuous casting billet and guarantees uniform cooling. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a gear steel weak cooling device for improving the flaw detection pass rate according to this utility model.

[0014] Figure 2 yes Figure 1 A schematic diagram of the structure at point A in the middle.

[0015] Figure 3 This is a front view schematic diagram of a gear steel weak cooling device for improving the pass rate of flaw detection according to this utility model.

[0016] In the diagram: 1. Frame; 2. Hydraulic telescopic cylinder; 3. Insulation sleeve; 4. Nozzle; 5. Metal hose; 6. Main water supply pipe; 7. Water supply unit; 8. Branch pipe; 9. Electrically controlled valve; 10. Turbine flow sensor; 11. Infrared temperature sensor; 12. Controller. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments, such as... Figures 1 to 3 As shown:

[0018] Example 1: A gear steel weak cooling device to improve the flaw detection pass rate includes a frame 1, which is set at the outlet of the crystallizer. The frame 1 is provided with multiple sets of cooling units at intervals. The cooling units are arranged at intervals along the direction away from the crystallizer. Each cooling unit includes four telescopic rods. Adjacent telescopic rods are perpendicular to each other and the telescopic rods are perpendicular to the surface of the corresponding continuous casting billet.

[0019] The end of the telescopic rod is connected to a nozzle 4, and each nozzle 4 is connected to a metal hose 5. The telescopic rod extends and retracts to adjust the distance between the nozzle 4 and the surface of the continuous casting billet. In order to address the problem that the water mist coverage area is different due to different water volume of the nozzle 4, the distance between the nozzle 4 and the continuous casting billet is adjusted so that the water mist can completely cover the continuous casting billet and ensure uniform cooling.

[0020] A main water supply pipe 6 is installed on the frame 1. The main water supply pipe 6 is connected to a water supply unit 7. The water supply unit 7 supplies water to the main water supply pipe 6. The main water supply pipe 6 is equipped with multiple branch pipes 8. Each branch pipe 8 corresponds to a cooling unit. Each branch pipe 8 is equipped with an electrically controlled valve 9. The electrically controlled valve 9 controls the amount of water entering the branch pipe 8. Each branch pipe 8 is connected to a corresponding metal hose 5. The main water supply pipe 6 supplies water to each metal hose 5 through the branch pipes 8.

[0021] Multiple infrared temperature sensors 11 are spaced apart on the frame 1. The infrared sensors test the temperature of various parts of the continuous casting billet. A controller 12 is installed outside the water supply unit 7. The controller 12 is connected to the water supply unit 7 and each infrared temperature sensor 11. Based on the data from the infrared temperature sensors 11 installed at various points on the frame 1, the controller controls the electric valve 9 and the water supply unit 7 to regulate the water volume of each nozzle 4, thereby regulating the cooling rate of the gear steel continuous casting billet, so that the continuous casting billet cools slowly, reduces internal stress, reduces cracks, and thus improves the flaw detection pass rate.

[0022] Example 2: A gear steel weak cooling device to improve the flaw detection pass rate includes a frame 1, which is set at the outlet of the crystallizer. The frame 1 is provided with multiple sets of cooling units at intervals. The cooling units are arranged at intervals along the direction away from the crystallizer. Each cooling unit includes four telescopic rods. Adjacent telescopic rods are perpendicular to each other and the telescopic rods are perpendicular to the surface of the corresponding continuous casting billet.

[0023] The telescopic rod is connected to a nozzle 4 at its end, and each nozzle 4 is connected to a metal hose 5. The telescopic rod extends and retracts to adjust the distance between the nozzle 4 and the surface of the continuously cast billet. To address the issue of different water mist coverage areas due to different water volumes from the nozzle 4, the distance between the nozzle 4 and the continuously cast billet is adjusted to ensure that the water mist can completely cover the continuously cast billet and guarantee uniform cooling. The telescopic rod includes a hydraulic telescopic cylinder 2 and a heat insulation sleeve 3. The two ends of the hydraulic telescopic cylinder 2 are connected to the frame 1 and the heat insulation sleeve 3, respectively. The heat insulation sleeve 3 is connected to the nozzle 4. The heat insulation sleeve 3 includes a metal tube with one open end, and the outside of the metal tube is lined with a high thermal resistance asbestos material. The hydraulic telescopic cylinder 2 is connected to a hydraulic station.

[0024] A main water supply pipe 6 is installed on the frame 1. The main water supply pipe 6 is connected to a water supply unit 7. The water supply unit 7 includes a water supply tank and a variable frequency pump is installed in the water supply tank. The variable frequency pump is equipped with an output pipe connected to the main water supply pipe 6. The water supply unit 7 supplies water to the main water supply pipe 6. The main water supply pipe 6 is equipped with multiple branch pipes 8. Each branch pipe 8 corresponds to a cooling unit. Each branch pipe 8 is equipped with an electrically controlled valve 9, which controls the amount of water entering the branch pipe 8. Each branch pipe 8 is equipped with a turbine flow sensor 10, which monitors the water flow. Each branch pipe 8 is connected to a corresponding metal hose 5. The main water supply pipe 6 supplies water to each metal hose 5 through the branch pipes 8.

[0025] Multiple infrared temperature sensors 11 are spaced apart on the frame 1. The infrared sensors test the temperature of various parts of the continuous casting billet. A controller 12 is installed outside the water supply unit 7. The controller 12 is connected to the water supply unit 7 and each infrared temperature sensor 11 and turbine flow sensor 10.

[0026] The working principle is as follows:

[0027] After the gear steel continuous casting billet is output from the continuous casting machine, the water supply unit 7 is activated to deliver water to each nozzle 4 to cool the continuous casting billet. Based on the data from the infrared temperature sensors 11 installed at various locations on the frame 1, the electronic control valve 9 and the water supply unit 7 are controlled to regulate the water volume of each nozzle 4, thereby regulating the cooling rate of the gear steel continuous casting billet, so that the continuous casting billet cools slowly, reduces internal stress, reduces cracks, and thus improves the flaw detection pass rate. During the process of adjusting the water volume of the nozzle 4, in order to address the problem of different water mist coverage areas due to different water volumes of the nozzle 4, the distance between the nozzle 4 and the continuous casting billet is adjusted so that the water mist can completely cover the continuous casting billet.

[0028] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A gear steel weak cooling device for improving flaw detection pass rate, characterized in that: The equipment includes a frame (1), which is located at the outlet of the crystallizer. The frame (1) is equipped with multiple cooling units at intervals. Each cooling unit includes four telescopic rods, which are perpendicular to each other. The ends of the telescopic rods are connected to nozzles (4), and each nozzle (4) is connected to a metal hose (5). A water supply main pipe (6) is installed on the frame (1), and a water supply unit (7) is connected to the water supply main pipe (6). The water supply main pipe (6) is equipped with multiple branch pipes (8), which correspond one-to-one with the cooling units. Each branch pipe (8) is equipped with an electrically controlled valve (9), and each branch pipe (8) is connected to the corresponding metal hose (5). Multiple infrared temperature sensors (11) are installed at intervals on the frame (1).

2. The gear steel weak cooling device for improving the flaw detection pass rate as described in claim 1, characterized in that: The telescopic rod includes a hydraulic telescopic cylinder (2) and a heat insulation sleeve (3). The two ends of the hydraulic telescopic cylinder (2) are connected to the frame (1) and the heat insulation sleeve (3) respectively, and the heat insulation sleeve (3) is connected to the nozzle (4).

3. The gear steel weak cooling device for improving the flaw detection pass rate as described in claim 2, characterized in that: The heat insulation sleeve (3) includes a metal tube with one end open, and a high thermal resistance asbestos material is provided on the outside of the metal tube.

4. The gear steel weak cooling device for improving the flaw detection pass rate as described in claim 1, characterized in that: Turbine flow sensors (10) are installed on each of the branch pipes (8).

5. The gear steel weak cooling device for improving the flaw detection pass rate as described in claim 1, characterized in that: The water supply unit (7) includes a water supply tank, a variable frequency pump is installed in the water supply tank, and the variable frequency pump is equipped with an output pipe connected to the main water supply pipe (6).

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