RH refining water model flow field monitoring device and method based on trackball

Abstract

The invention belongs to the technical field of steel smelting, and particularly relates to an RH refining water model flow field monitoring device and method based on a trackball. An RH refining water model flow field monitoring device based on trackballs comprises an RH refining water model, a trackball unit, an image acquisition unit and a data processing and display unit, the RH refining water model comprises a vacuum tank and a simulation steel ladle, simulation molten steel and a circulating water pump are arranged in the simulation steel ladle, the trackball unit comprises a plurality of trackballs, and the trackball unit is connected with the vacuum tank and the simulation steel ladle. The tracking balls are dispersed in simulated molten steel, the tracking balls are hollow balls, micro wireless sensors, storages and wireless transmission signal communication modules are arranged in the tracking balls, the image acquisition unit comprises a plurality of cameras, and the data processing and display unit is connected with the image acquisition unit. The liquid flow field change in the vacuum tank is collected and analyzed by adopting the motion trail of the tracking ball, the real-time visual monitoring of the flow field characteristics is realized, and the device has the advantages of low cost, high precision, strong adaptability and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel smelting, and particularly relates to a RH refining water model flow field monitoring device and method based on a tracking ball. Background Art

[0002] The RH refining process is an important technical means to improve the quality of molten steel during the steelmaking process. During the RH refining process, the molten steel is lifted into the vacuum chamber by bottom blowing argon gas to remove impurities, degas, and finely adjust the alloy. In RH refining, the flow field characteristics of the molten steel have an important impact on the refining efficiency.

[0003] Currently, the existing technologies for monitoring the flow state of molten steel during RH refining still rely on indirect parameters (such as argon gas flow rate, internal pressure, etc.). Due to the complexity of the liquid flow field in the vacuum chamber, it is difficult to accurately describe the flow state of the fluid during RH refining by direct means. Summary of the Invention

[0004] Aiming at the above problems, the purpose of the present invention is to provide a RH refining water model flow field monitoring device and method based on a tracking ball. By combining a lightweight tracking ball with high-precision image analysis technology, the movement trajectory of the tracking ball is used to collect and analyze the changes in the liquid flow field in the vacuum chamber, realizing real-time visualization monitoring of the flow field characteristics. It has the advantages of low cost, high precision, strong adaptability, etc., and can provide technical support for the intelligent upgrade of the RH refining process.

[0005] The technical solution of the present invention is as follows: A RH refining water model flow field monitoring device based on a tracking ball includes a RH refining water model, a tracking ball unit, an image acquisition unit, and a data processing and display unit. The RH refining water model includes a vacuum chamber and a simulated ladle. The vacuum chamber is connected above the simulated ladle through an input pipeline and an output pipeline. The top of the vacuum chamber is provided with a plurality of exhaust holes. A gas injection hole is provided at the connection of the input pipeline of the vacuum chamber to the simulated ladle at the bottom. The gas injection hole is connected to a gas injection pump. The simulated ladle is provided with simulated molten steel and a circulation water pump. The tracking ball unit includes a plurality of tracking balls, and the tracking balls are dispersed in the simulated molten steel. The tracking ball is a hollow sphere, and a micro wireless sensor, a memory, and a wireless transmission signal communication module are arranged inside it. The image acquisition unit includes several cameras, and the cameras are evenly distributed around the vacuum chamber and the simulated ladle. An LED array is arranged behind the cameras. The data processing and display unit is connected to the image acquisition unit.

[0006] The vacuum chamber and the simulated ladle are of a transparent housing structure, and the material is corrosion-resistant acrylic or glass.

[0007] The material of the tracking ball is a lightweight polymer, which is polypropylene. The density range of the tracking ball is 0.95 - 1.05 g / cm³, and the diameter of the tracking ball is 5 - 10 mm.

[0008] The micro wireless sensor is an RFID tag for electromagnetic signal identification.

[0009] The wireless transmission signal communication module is a wireless radio frequency device that uses 2.4G radio frequency or Bluetooth for data transmission.

[0010] The camera is a high-speed camera with a frame rate ≥ 1000 fps, and the camera is equipped with a polarization filter.

[0011] A method for monitoring the flow field of the RH refining water model based on a tracking ball uses a device for monitoring the flow field of the RH refining water model based on a tracking ball as described above, and includes the following steps: S1: Pour simulated molten steel into the simulated ladle to a preset liquid level, start the circulation water pump and the gas injection pump to simulate the RH refining working condition; S2: Put the tracking ball into the simulated ladle, and match the density with the simulated molten steel to ensure its natural movement along with the flow field; S3: Continuously photograph the movement of the tracking ball through the camera, synchronously record the timestamp and spatial coordinates, and synchronously receive the acceleration and angular velocity data transmitted wirelessly through the micro wireless sensor built in the tracking ball; S4: The data processing and display unit extracts the continuous movement trajectories of each tracking ball, interpolates the discrete continuous movement trajectory data into a continuous flow velocity field, and generates vorticity contour maps, flow velocity vector maps, and turbulent kinetic energy distribution maps for output; S5: Repeat steps S1 - S4, compare the flow field characteristics under different working conditions, such as gas flow rate and immersion tube depth, and determine the optimal process parameters.

[0012] The technical effect of the present invention is that the present invention collects and analyzes the changes in the liquid flow field in the vacuum tank by tracking the movement trajectory of the tracking ball, realizes the real-time visual monitoring of the flow field characteristics, has the advantages of low cost, high precision, strong adaptability, etc., and can provide technical support for the intelligent upgrade of the RH refining process.

[0013] The following will be further described with reference to the accompanying drawings. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of a device for monitoring the flow field of the RH refining water model based on a tracking ball of the present invention.

[0015] Figure 2 is a schematic diagram of data transmission of the tracking ball of the present invention.

[0016] Reference numerals: 1 - vacuum chamber; 2 - camera; 3 - simulated ladle; 4 - tracking ball; 11 - exhaust hole; 12 - gas injection hole. Detailed implementation manners Example 1

[0017] As Figures 1 to 2 shown, a RH refining water model flow field monitoring device based on a tracking ball includes a RH refining water model, a tracking ball unit, an image acquisition unit, and a data processing and display unit. The RH refining water model includes a vacuum chamber 1 and a simulated ladle 3. The vacuum chamber 1 is connected above the simulated ladle 3 through an input pipeline and an output pipeline. A plurality of exhaust holes 11 are provided at the top of the vacuum chamber 1. A gas injection hole 12 is provided at the connection of the bottom of the vacuum chamber 1 to the input pipeline of the simulated ladle 3. The gas injection hole 12 is connected to a gas injection pump. The simulated ladle 3 is provided with simulated molten steel and a circulating water pump. The tracking ball unit includes a plurality of tracking balls 4. The tracking balls 4 are dispersed in the simulated molten steel. The tracking ball 4 is a hollow sphere, and a micro wireless sensor, a memory, and a wireless transmission signal communication module are provided therein. The image acquisition unit includes a number of cameras 2. The cameras 2 are evenly distributed around the vacuum chamber 1 and the simulated ladle 3. An LED array is provided behind the cameras 2. The data processing and display unit is connected to the image acquisition unit.

[0018] During actual use, simulated molten steel is poured into the simulated ladle 3 to a preset liquid level, the circulating water pump and the gas injection pump are started to simulate the RH refining working condition; tracking balls 4 are put into the simulated ladle 3, and the density is matched with the simulated molten steel to ensure its natural movement along with the flow field; the cameras 2 continuously shoot the movement of the tracking balls 4, synchronously record the time stamp and the spatial coordinates, and through the micro wireless sensors built in the tracking balls 4, the acceleration and angular velocity data wirelessly transmitted are synchronously received; the data processing and display unit extracts the continuous movement trajectories of the tracking balls 4, interpolates the discrete continuous movement trajectory data into a continuous flow velocity field, and generates and outputs a vorticity contour map, a flow velocity vector map, and a turbulent kinetic energy distribution map; the above steps are repeated, and the flow field characteristics under different working conditions, such as gas flow rate and immersion tube depth, are compared to determine the optimal process parameters. The present invention collects and analyzes the changes in the liquid flow field in the vacuum chamber by tracking the movement trajectories of the balls, realizes the real-time visual monitoring of the flow field characteristics, and has the advantages of low cost, high precision, and strong adaptability, and can provide technical support for the intelligent upgrade of the RH refining process. Example 2

[0019] On the basis of Example 1, in this example, preferably, the vacuum chamber 1 and the simulated ladle 3 are of a transparent housing structure, and the material thereof is corrosion-resistant acrylic or glass.

[0020] In actual use, the vacuum chamber 1 and the simulated ladle 3 of the present invention are transparent shell structures, and their materials are corrosion-resistant acrylic or glass, which is convenient for the camera to photograph and observe the tracking ball 4. Example 3

[0021] On the basis of Example 1 or Example 2, in this embodiment, preferably, the material of the tracking ball 4 is a light polymer, the light polymer is polypropylene, the density range of the tracking ball 4 is 0.95 - 1.05 g / cm³, and the diameter of the tracking ball 4 is 5 - 10 mm.

[0022] In actual use, the material of the tracking ball 4 of the present invention is a light polymer, the light polymer is polypropylene, and the density range of the tracking ball 4 is 0.95 - 1.05 g / cm³, which is convenient for the tracking ball 4 to be mixed with the simulated molten steel and move naturally with the flow field; Example 4

[0023] On the basis of Example 1 or Example 3, in this embodiment, preferably, the micro wireless sensor is an RFID tag for electromagnetic signal identification.

[0024] In actual use, the micro wireless sensor of the present invention is an RFID tag for electromagnetic signal identification, and the position change of the small ball is controlled in real time during the experiment. Example 5

[0025] On the basis of Example 1 or Example 4, in this embodiment, preferably, the wireless transmission signal communication module is a wireless radio frequency device, and data is transmitted using 2.4G radio frequency or Bluetooth.

[0026] In actual use, the wireless transmission signal communication module of the present invention is a wireless radio frequency device, and data is transmitted using 2.4G radio frequency or Bluetooth to ensure stable data transmission in high-temperature and strong electromagnetic environments. Example 6

[0027] On the basis of Example 1, in this embodiment, preferably, the camera 2 is a high-speed camera with a frame rate ≥ 1000 fps, and the camera 2 is provided with a polarization filter.

[0028] In actual use, the camera 2 of the present invention is a high-speed camera with a frame rate ≥ 1000 fps, and the camera 2 is provided with a polarization filter, and a polarization filter is equipped to eliminate the interference of water surface reflection. Example 7

[0029] A method for monitoring the flow field of an RH refining water model based on a tracking ball, using a device for monitoring the flow field of an RH refining water model based on a tracking ball as described above, includes the following steps: S1: Pour simulated molten steel into the simulated ladle 3 to a preset liquid level, start the circulating water pump and the gas injection pump, and simulate the RH refining working condition; S2: Put the tracking ball 4 into the simulated ladle 3, and match the density with the simulated molten steel to ensure its natural movement along with the flow field; S3: Continuously photograph the movement of the tracking ball 4 through the camera 2, synchronously record the time stamp and the spatial coordinates, and synchronously receive the acceleration and angular velocity data wirelessly transmitted by the tracking ball 4 through the built-in micro wireless sensor in the tracking ball 4; S4: The data processing and display unit extracts the continuous movement trajectories of each tracking ball 4, interpolates the discrete continuous movement trajectory data into a continuous flow velocity field, and generates and outputs a vorticity contour map, a flow velocity vector map, and a turbulent kinetic energy distribution map; S5: Repeat steps S1 to S4, compare the flow field characteristics under different working conditions, such as gas flow rate and immersion tube depth, and determine the optimal process parameters.

[0030] As mentioned above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A RH refining water model flow field monitoring device based on a tracking ball, characterized in that: It includes an RH refining water model, a tracking ball unit, an image acquisition unit, and a data processing and display unit. The RH refining water model includes a vacuum chamber (1) and a simulated ladle (3). The vacuum chamber (1) is connected above the simulated ladle (3) through an input pipe and an output pipe. The top of the vacuum chamber (1) is provided with a plurality of exhaust holes (11). A gas injection hole (12) is provided at the connection of the bottom of the vacuum chamber (1) to the input pipe of the simulated ladle (3). The gas injection hole (12) is connected to a gas injection pump. The simulated ladle (3) is provided with simulated molten steel and a circulating water pump. The tracking ball unit includes a plurality of tracking balls (4). The tracking balls (4) are dispersed in the simulated molten steel. The tracking balls (4) are hollow spheres, and a micro wireless sensor, a memory, and a wireless transmission signal communication module are arranged therein. The image acquisition unit includes several cameras (2). The cameras (2) are evenly distributed around the vacuum chamber (1) and the simulated ladle (3). An LED array is arranged behind the cameras (2). The data processing and display unit is connected to the image acquisition unit.

2. The RH refining water model flow field monitoring device based on a tracking ball according to claim 1, characterized in that: The vacuum chamber (1) and the simulated ladle (3) are of a transparent shell structure, and their materials are corrosion-resistant acrylic or glass.

3. The RH refining water model flow field monitoring device based on a tracking ball according to claim 1, characterized in that: The material of the tracking ball (4) is a light polymer, and the light polymer is polypropylene. The density range of the tracking ball (4) is 0.95 - 1.05 g / cm³, and the diameter of the tracking ball (4) is 5 - 10 mm.

4. The RH refining water model flow field monitoring device based on a tracking ball according to claim 1, characterized in that: The micro wireless sensor is an RFID tag for electromagnetic signal identification.

5. The RH refining water model flow field monitoring device based on a tracking ball according to claim 1, characterized in that: The wireless transmission signal communication module is a wireless radio frequency device, and data is transmitted using 2.4G radio frequency or Bluetooth.

6. The RH refining water model flow field monitoring device based on a tracking ball according to claim 1, characterized in that: The camera (2) is a high-speed camera with a frame rate ≥ 1000 fps, and the camera (2) is provided with a polarization filter.

7. A method for monitoring the flow field of the RH refining water model based on a tracking ball, using a device for monitoring the flow field of the RH refining water model based on a tracking ball as described in claim 1, characterized in that: It includes the following steps: S1: Pour simulated molten steel into the simulated ladle (3) to a preset liquid level, start the circulating water pump and the gas injection pump, and simulate the RH refining working condition; S2: Put the tracking balls (4) into the simulated ladle (3), and match the density with the simulated molten steel to ensure their natural movement along with the flow field; S3: Continuously photograph the movement of the tracking balls (4) through the cameras (2), synchronously record the time stamp and spatial coordinates, and synchronously receive the acceleration and angular velocity data wirelessly transmitted by the micro wireless sensors built in the tracking balls (4); S4: The data processing and display unit extracts the continuous movement trajectories of each tracking ball (4), interpolates the discrete continuous movement trajectory data into a continuous flow velocity field, and generates and outputs a vorticity contour map, a flow velocity vector map, and a turbulent kinetic energy distribution map; S5: Repeat steps S1 - S4, compare the flow field characteristics under different working conditions, such as gas flow rate and immersion tube depth, and determine the optimal process parameters.

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