Aerosol cooling experimental device

Abstract

The utility model provides an aerial fog cooling experimental device, and belongs to the technical field of metallurgical equipment. Comprising a linear motor which is composed of a linear motor rotor and a linear motor permanent magnet guide rail. The auxiliary sliding guide rail is parallel to the linear motor permanent magnet guide rail, and a hollow area is formed between the auxiliary sliding guide rail and the linear motor permanent magnet guide rail; the upper spraying beam is arranged right above the hollow area; the lower spraying beam is arranged under the hollow area; the test piece tray is of a hollow structure and can do reciprocating motion on the linear motor permanent magnet guide rail, and the hollow structure is matched with the hollow area. According to the utility model, the linear motor is adopted to drive the test piece to move in the aerial fog cooling area, so that a wide movement speed adjusting range can be realized, and thin steel plate test pieces with different thickness specifications can pass through the cooling area according to the speed requirement of the actual casting and rolling process.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical equipment technology, and in particular relates to an air mist cooling experimental device. Background Technology

[0002] Aerosol cooling is a technology that uses compressed air to atomize water, forming a fine, dispersed mist for cooling. Aerosol nozzles can control water flow and droplet size by changing air and water pressure, thereby altering the cooling heat exchange conditions and meeting cooling requirements over a wide range of cooling rate control. Currently, aerosol cooling has become the basic form of post-rolling cooling for thin strip casting and rolling.

[0003] To test the heat exchange capacity of aerosol cooling, an aerosol cooling experimental platform is typically established. Heated steel plates and other materials are subjected to aerosol cooling. The temperature of the steel plate is measured using thermocouples embedded inside or welded to its surface. The convective heat transfer coefficient (HTC) of the steel plate surface is obtained through temperature field back-calculation. However, because experimental platforms typically occupy a small area, the hot steel plate is often stationary or moves at very low speeds, such as 5 m / min. The HTC value measured at these low experimental speeds differs significantly from the HTC value at actual post-casting and rolling speeds (e.g., 200 m / min). Using the experimentally measured HTC value to predict the actual aerosol cooling temperature of the steel plate will result in a large error, leading to low accuracy in cooling model calculations.

[0004] Therefore, it is of great significance to design and develop an experimental device that can provide a more realistic simulation of specimen cooling.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] To address the technical problem of existing aerosol cooling experimental devices where the low movement speed of the cooled specimen leads to significant differences between the aerosol cooling state and the actual cooling effect, an aerosol cooling experimental device is provided.

[0007] This utility model provides an aerosol cooling experimental device, comprising:

[0008] A linear motor, which consists of a linear motor mover and a linear motor permanent magnet guide rail, wherein the linear motor mover performs linear motion or reciprocating motion along the linear motor permanent magnet guide rail;

[0009] An auxiliary sliding guide rail is arranged parallel to the linear motor permanent magnet guide rail and has a hollow area between it and the linear motor permanent magnet guide rail;

[0010] The upper spray beam is positioned directly above the hollow region;

[0011] The lower spray beam is located directly below the hollow region;

[0012] The specimen tray has a hollow structure and can reciprocate on the linear motor permanent magnet guide rail. The hollow structure matches the hollow area.

[0013] In some embodiments, the linear motor permanent magnet guide rail includes a permanent magnet assembly, and the permanent magnet assembly has a first mover slide rail and a second mover slide rail on both sides along its length.

[0014] There is a hollow area between the second moving slide rail and the auxiliary sliding guide rail.

[0015] In some embodiments, the upper spray beam includes a plurality of upper aerosol nozzles, and the lower spray beam includes a plurality of lower aerosol nozzles, wherein the number and position of the upper aerosol nozzles match the number and position of the lower aerosol nozzles;

[0016] And / or, a spray zone is formed between the upper spray beam and the lower spray beam, and a high-temperature thermometer is provided at the inlet and outlet of the spray zone; preferably, the high-temperature thermometer range is 300℃~3000℃, more preferably, the high-temperature thermometer range is 300℃~1100℃.

[0017] In some embodiments, the aerosol cooling experimental device further includes a water supply device and an air supply device, wherein the upper aerosol nozzle and the lower aerosol nozzle are respectively connected to the water supply device and the air supply device.

[0018] In some embodiments, the upper spray beam further includes an upper water pipe and an upper air pipe;

[0019] The inlet of the upper water pipe is connected to the water supply device, and the outlet of the upper water pipe is connected to the upper aerosol nozzle.

[0020] The inlet of the upper air pipe is connected to the air supply device, and the outlet of the upper air pipe is connected to the upper aerosol nozzle.

[0021] And / or, the lower spray beam may further include a lower water pipe and a lower air pipe;

[0022] The inlet of the lower water pipe is connected to the water supply device, and the outlet of the lower water pipe is connected to the lower aerosol nozzle.

[0023] The inlet of the lower air pipe is connected to the air supply device, and the outlet of the lower air pipe is connected to the lower aerosol nozzle.

[0024] In some embodiments, the water supply device includes a pipeline centrifugal pump, one end of which is connected to a water tank and the other end of which is connected to the inlet of a main water supply pipeline. The outlet of the main water supply pipeline is connected to a first branch pipe and a second branch pipe, respectively. The first branch pipe is connected to the inlet of the upper branch pipe and the second branch pipe is connected to the inlet of the lower branch pipe.

[0025] In some embodiments, the main water supply pipeline is equipped with a gate valve and a pressure gauge;

[0026] The first and second water pipes are respectively equipped with a manual on / off valve, an electromagnetic flow meter, an electromagnetic regulating valve, a pneumatic on / off valve, and a pressure gauge.

[0027] In some embodiments, the air supply device includes an air compressor, an air tank, and a main air supply pipeline connected in sequence. The outlet of the main air supply pipeline is connected to a first branch pipe and a second branch pipe, respectively. The first branch pipe is connected to the inlet of the upper part of the air pipe, and the second branch pipe is connected to the inlet of the lower part of the air pipe.

[0028] In some embodiments, the main gas supply pipeline is equipped with a gas pressure regulating valve and a pressure gauge;

[0029] The first bronchus and the second bronchus are respectively equipped with a manual on / off valve, an electromagnetic flow meter, an electromagnetic regulating valve, a pneumatic on / off valve, and a pressure gauge.

[0030] In some embodiments, the upper spray beam and the lower spray beam are respectively provided with lifting devices;

[0031] And / or, the specimen tray is provided with a plurality of positioning pins, preferably, the specimen tray is provided with at least 4 positioning pins;

[0032] And / or, a support platform is provided under the permanent magnet guide rail of the linear motor.

[0033] Compared with the prior art, the technical effects achieved by this utility model are as follows:

[0034] (1) This utility model uses a linear motor to drive the specimen to move in the air mist cooling zone, which can achieve a wide range of movement speed adjustment and can meet the requirements of thin steel plate specimens of different thicknesses to pass through the cooling zone in accordance with the actual casting and rolling process speed.

[0035] (2) The water supply device and the electrical control device of this utility model constitute a water pressure closed-loop control, and the air supply device and the electrical control device constitute an air pressure closed-loop control. Water pressure and air pressure can be controlled separately. Air pressure and water pressure can be set and adjusted according to process requirements to obtain aerosols with different impact forces and atomization qualities.

[0036] (3) The water supply device and electrical control device of this utility model also constitute a closed-loop control of water flow, and the water flow can be controlled according to the process requirements.

[0037] (4) Both the upper and lower spray beams of this utility model can be adjusted up and down within a certain range to obtain air mist with different impact forces to cool the specimen. The installation height of the nozzle from the roller surface can be optimized according to the cooling capacity.

[0038] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the thin steel plate aerosol cooling experimental device provided in one embodiment of the present invention;

[0040] Figure 2 This is a top view of the working surface of the thin steel plate aerosol cooling experimental device provided in one embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the structure of the water supply device and the gas supply device provided in one embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of the specimen tray provided in one embodiment of the present invention;

[0043] In the diagram: 1. Water tank; 2. Water pump; 3. Pressure regulating valve; 4. Pressure gauge; 5. Manual on / off valve; 6. Flow meter; 7. Electromagnetic regulating valve; 8. Pneumatic on / off valve; 9. Air compressor; 10. Air storage tank; 11. Gas pressure regulating valve; 12. Actuator; 13. Slider; 14. Specimen tray; 15. Inlet pyrometer; 16. Upper aerosol nozzle; 17. Upper water pipe; 18. Upper air pipe; 19. Outlet pyrometer; 20. Roller conveyor; 211. Auxiliary sliding guide rail; 212. First mover slide rail; 213. Second mover slide rail; 22. Lower aerosol nozzle; 23. Lower water pipe; 24. Lower air pipe; 25. Mechanical support platform; 26. Linear motor mover; 27. Linear motor permanent magnet guide rail; 28. Permanent magnet assembly; 29. ​​Positioning pin; 30. Thin steel plate specimen. Detailed Implementation

[0044] The technical solution of this utility model is described below with reference to the accompanying drawings and specific embodiments. It should be understood that the one or more steps mentioned in this utility model do not preclude the existence of other methods and steps before or after the combined steps, or that other methods and steps may be inserted between these explicitly mentioned steps. It should also be understood that these examples are for illustrative purposes only and are not intended to limit the scope of this utility model. Unless otherwise stated, the numbering of each method step is only for the purpose of identifying each method step, and not for limiting the order of each method or defining the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantial changes to the technical content, can also be considered as within the scope of implementation of this utility model.

[0045] The raw materials and instruments used in the examples are not subject to any specific restrictions on their source; they can be purchased from the market or prepared according to conventional methods known to those skilled in the art.

[0046] like Figures 1-4 As shown, a thin steel plate aerosol cooling experimental device includes:

[0047] The linear motor is mounted on the mechanical support platform 25. It consists of a linear motor mover 26 and a linear motor permanent magnet guide rail 27. The linear motor mover 26 (model TLM235, motor type H1154, maximum speed 4.4m / s, maximum acceleration 10G, rated thrust 1140N, maximum thrust 2622N, repeatability ±1μm) can run unidirectionally or reciprocally on the linear motor permanent magnet guide rail 27 (length 4.5m) under the drive of the driver 12.

[0048] An auxiliary sliding guide rail 211 is arranged parallel to the linear motor permanent magnet guide rail 27 and has a hollow area between it and the linear motor permanent magnet guide rail 27.

[0049] The linear motor permanent magnet guide rail 27 includes a permanent magnet assembly 28, on both sides of the permanent magnet assembly 28 along its length direction, a first mover slide rail 212 and a second mover slide rail 213 are provided; specifically, there is a hollow area between the second mover slide rail and the auxiliary sliding guide rail 211.

[0050] The upper spray beam is positioned directly above the hollow region;

[0051] The lower spray beam is located directly below the hollow region;

[0052] A spray zone is formed between the upper spray beam and the lower spray beam, and the inlet of the spray zone is equipped with an inlet pyrometer 15 and an outlet pyrometer 19;

[0053] The specimen tray 14 has a hollow structure and can reciprocate on the linear motor permanent magnet guide rail 27. The hollow structure matches the hollow area.

[0054] In one embodiment, the upper spray beam and the lower spray beam are respectively provided with lifting devices, which can be adjusted mechanically.

[0055] In one embodiment, five exhaust mist nozzles 16 are installed on the upper spray beam, and five exhaust mist nozzles 22 are also installed on the lower spray beam, with the upper mist nozzles 16 and the lower mist nozzles 22 corresponding one-to-one.

[0056] In one embodiment, the upper aerosol nozzle 16 and the lower aerosol nozzle 22 are respectively connected to a water supply device and an air supply device. The upper spray beam includes an upper water pipe 17 and an upper air pipe 18; the inlet of the upper water pipe 17 is connected to the water supply device, and the outlet of the upper water pipe 17 is connected to the upper aerosol nozzle 16; the inlet of the upper air pipe 18 is connected to the air supply device, and the outlet of the upper air pipe 18 is connected to the upper aerosol nozzle 16. The lower spray beam also includes a lower water pipe 23 and a lower air pipe 24; the inlet of the lower water pipe 23 is connected to the water supply device, and the outlet of the lower water pipe 23 is connected to the lower aerosol nozzle 22; the inlet of the lower air pipe 24 is connected to the air supply device, and the outlet of the lower air pipe 24 is connected to the lower aerosol nozzle 22.

[0057] In one embodiment, the water supply device uses a pipeline centrifugal pump 2 (80mm diameter, 44m³ / h flow rate) 3 / h, head 60m) from pool 1 (100m 3 Water is pumped into the main water supply pipeline (DN80). After pressure regulation by a gate valve 3 and a pressure gauge 4, the water is divided into a first branch pipe and a second branch pipe. The first branch pipe is connected to the inlet of the upper water pipe 17 to supply water to the upper aerosol nozzle 16. The second branch pipe is connected to the inlet of the lower water pipe 23 to supply water to the lower aerosol nozzle 22. A manual on / off valve 5 (DN50), an electromagnetic flow meter 6 (DN50), an electromagnetic regulating valve 7 (DN50), a pneumatic on / off valve 8 (DN50), and a pressure gauge 4 are respectively installed on the first and second branch pipes.

[0058] In one embodiment, the air supply device mainly consists of an air compressor 9 (discharge capacity 6.2m³). 3 Compressed air is generated at a rate of 0.8 MPa / min and discharged at an exhaust pressure of 0.8 MPa, and then delivered to a 10m³ storage tank. 3The compressed air is then transported to the main gas supply pipeline (DN80) through the gas storage tank 10. After being regulated by a gas pressure regulating valve 11 and a pressure gauge 4, the compressed air is divided into a first branch pipe and a second branch pipe. The first branch pipe is connected to the inlet of the upper part of the air pipe 18 to supply air to the upper aerosol nozzle 16. The second branch pipe is connected to the inlet of the lower part of the air pipe 24 to supply air to the lower aerosol nozzle 22. A manual on / off valve 5 (DN50), a gas flow meter 6 (DN50), an electromagnetic regulating valve 7 (DN50), a pneumatic on / off valve 8 (DN50), and a pressure gauge 4 are respectively installed on the first branch pipe and the second branch pipe.

[0059] In one embodiment, a roller conveyor 20 is provided below the linear motor permanent magnet guide rail 27, corresponding to the upper and lower spray beams. The lower spray beam is located below the roller conveyor 20, which is lower than the specimen tray 14. Six cylindrical hollow rollers 20 (Φ260×350mm) are arranged sequentially on the roller conveyor 20. The roller conveyor 20 does not perform a transmission function; it is only used to simulate the working conditions of actual aerosol nozzles. This is because there are rollers on the actual aerosol cooling line, and the aerosol nozzles are arranged above and below the rollers, making the simulation of this device more realistic. Each row of upper aerosol nozzles 16 is arranged sequentially between two rollers, with each row of upper aerosol nozzles 16 staggered by 1 to 2 nozzles. That is, the five rows of upper aerosol nozzles contain 1, 2, 1, 2, and 1 nozzles respectively. Each row needs to be staggered by a certain distance to maintain cooling uniformity. Five rows of lower aerosol nozzles 22 are also installed under the roller conveyor. Each row of lower aerosol nozzles 22 is arranged between the two roller conveyors. Each row of lower aerosol nozzles 22 is staggered by 2 to 1 nozzles. That is, the five rows of lower aerosol nozzles 22 contain 2, 1, 2, 1, and 2 nozzles respectively. In order to maintain the uniformity of cooling, each row also needs to be staggered by a certain distance.

[0060] Preferably, a water collection trough and a drain valve are provided at the lower part of the roller conveyor 20.

[0061] In one embodiment, one end of the specimen tray 14 is connected to the linear motor mover 26, and the other end is connected to the auxiliary sliding guide rail 211. Driven by the linear motor mover 26, the specimen tray 14 can continuously enter and leave the aerosol cooling area (the hollow area corresponding to the upper spray beam and the lower spray beam). To maintain balance, the other end of the specimen tray 14 slides on the auxiliary sliding guide rail 211 via the slider 13. Before testing, the thin steel plate specimen 30 (575 mm in length and 275 mm in width) is fixed to the specimen tray 14 by positioning pins 29 (the thin steel plate specimen has positioning holes, which are used to fix it to the positioning pins 29). The thin steel plate specimen 30 is exposed in the hollow structure area of ​​the specimen tray 14. A pyrometer 15 (range 300-1100℃) is arranged at the inlet of the mist cooling zone, and a pyrometer 19 (range 300-1100℃) is also arranged at the outlet to measure the temperature of the thin steel plate specimen 30 in the specimen tray 14.

[0062] The working principle of the thin steel plate aerosol cooling experimental device provided by this utility model is as follows:

[0063] After being heated in a furnace, the wire-cut thin steel plate specimen 30 is fixed on the specimen tray 14 by positioning pins 29, exposing the hollow structural area of ​​the specimen tray 14. Driven by the driver 12, the linear motor mover 26 drives the specimen tray 14 and the thin steel plate specimen 30 on it to run according to a preset stroke and speed regime. It accelerates before entering the aerosol cooling zone and passes through the aerosol cooling zone located between the upper and lower spray beams at a constant speed. The temperature of the thin steel plate specimen 30 when entering the aerosol cooling zone can be measured by the inlet pyrometer 15, and the temperature when leaving the aerosol cooling zone can be measured by the outlet pyrometer 19. Driven by the linear motor mover 26, the thin steel plate specimen 30 can also reciprocate along the linear motor permanent magnet guide rail 27, passing through the aerosol cooling zone multiple times and continuously cooling down.

[0064] In one embodiment, the linear motor can perform unidirectional and reciprocating motion in a "stationary-acceleration-constant speed-deceleration-stationary" manner, which can drive the thin steel plate specimen 30 to be cooled once or multiple times in the cooling zone where the aerosol nozzle is located.

[0065] This invention is not only applicable to thin steel plates, but also has a good cooling effect on thick steel plates and other thin and thick plates.

[0066] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. An aerosol cooling experimental device, characterized in that, include: A linear motor, which consists of a linear motor mover and a linear motor permanent magnet guide rail, wherein the linear motor mover performs linear motion or reciprocating motion along the linear motor permanent magnet guide rail; An auxiliary sliding guide rail is arranged parallel to the linear motor permanent magnet guide rail and has a hollow area between it and the linear motor permanent magnet guide rail; The upper spray beam is positioned directly above the hollow region; The lower spray beam is located directly below the hollow region; The specimen tray has a hollow structure and can reciprocate on the linear motor permanent magnet guide rail. The hollow structure matches the hollow area.

2. The aerosol cooling experimental apparatus according to claim 1, characterized in that, The linear motor permanent magnet guide rail includes a permanent magnet assembly, and the permanent magnet assembly has a first mover slide rail and a second mover slide rail on both sides along its length. There is a hollow area between the second moving slide rail and the auxiliary sliding guide rail.

3. The aerosol cooling experimental apparatus according to claim 1, characterized in that, The upper spray beam includes a plurality of upper aerosol nozzles, and the lower spray beam includes a plurality of lower aerosol nozzles. The number and position of the upper aerosol nozzles match the number and position of the lower aerosol nozzles. And / or, a spray zone is formed between the upper spray beam and the lower spray beam, and a high-temperature thermometer is provided at the inlet and outlet of the spray zone.

4. The aerosol cooling experimental apparatus according to claim 3, characterized in that, The aerosol cooling experimental device also includes a water supply device and an air supply device, and the upper aerosol nozzle and the lower aerosol nozzle are respectively connected to the water supply device and the air supply device.

5. The aerosol cooling experimental apparatus according to claim 4, characterized in that, The upper spray beam also includes an upper water pipe and an upper air pipe; The inlet of the upper water pipe is connected to the water supply device, and the outlet of the upper water pipe is connected to the upper aerosol nozzle. The inlet of the upper air pipe is connected to the air supply device, and the outlet of the upper air pipe is connected to the upper aerosol nozzle. And / or, the lower spray beam may further include a lower water pipe and a lower air pipe; The inlet of the lower water pipe is connected to the water supply device, and the outlet of the lower water pipe is connected to the lower aerosol nozzle. The inlet of the lower air pipe is connected to the air supply device, and the outlet of the lower air pipe is connected to the lower aerosol nozzle.

6. The aerosol cooling experimental apparatus according to claim 5, characterized in that, The water supply device includes a pipeline centrifugal pump, one end of which is connected to a water tank and the other end of which is connected to the inlet of the main water supply pipeline. The outlet of the main water supply pipeline is connected to a first branch pipe and a second branch pipe. The first branch pipe is connected to the inlet of the upper branch pipe and the second branch pipe is connected to the inlet of the lower branch pipe.

7. The aerosol cooling experimental apparatus according to claim 6, characterized in that, The main water supply pipeline is equipped with a gate valve and a pressure gauge. The first and second water pipes are respectively equipped with a manual on / off valve, an electromagnetic flow meter, an electromagnetic regulating valve, a pneumatic on / off valve, and a pressure gauge.

8. The aerosol cooling experimental apparatus according to claim 5, characterized in that, The air supply device includes an air compressor, an air tank, and a main air supply pipeline connected in sequence. The outlet of the main air supply pipeline is connected to a first branch pipe and a second branch pipe. The first branch pipe is connected to the inlet of the upper part of the air pipe, and the second branch pipe is connected to the inlet of the lower part of the air pipe.

9. The aerosol cooling experimental apparatus according to claim 8, characterized in that, The main gas supply pipeline is equipped with a gas pressure regulating valve and a pressure gauge; The first bronchus and the second bronchus are respectively equipped with a manual on / off valve, an electromagnetic flow meter, an electromagnetic regulating valve, a pneumatic on / off valve, and a pressure gauge.

10. The aerosol cooling experimental apparatus according to claim 1, characterized in that, The upper spray beam and the lower spray beam are each equipped with a lifting device; And / or, the specimen tray is provided with a plurality of positioning pins; And / or, a support platform is provided under the permanent magnet guide rail of the linear motor.

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