A staged temperature-controlled water-cooled box

Abstract

This utility model discloses a staged temperature-controlled water-cooled box, including a cooling box body installed on one side of the rolling mill. The cooling box body has symmetrically arranged inlet and outlet at both ends. Several mounting holes are arranged axially on the cooling box body, and several cooling nozzles are installed in these holes. A water supply pipeline is provided on the cooling box body. This utility model relates to the field of rolling mill cooling technology. This staged cooling system, through dual control of spatial gradient and time dynamics, reduces the core-surface temperature difference of wire rod from 50℃ in traditional processes to within 15℃, improving cooling uniformity by 70%. When the rolling speed changes abruptly, the differentiated response characteristics of the three-level zones form a buffer effect. The roughing cooling zone quickly adjusts the basic cooling intensity, while the finishing cooling zone finely adjusts to complete closed-loop temperature control. Compared with the solenoid valve staged control method, the overall system response time is shortened to 1.2 seconds, and water consumption is reduced by 30%, providing a refined cooling solution for high-speed wire rod temperature control rolling.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill cooling technology, specifically to a staged temperature-controlled water-cooled box. Background Technology

[0002] In modern wire rod rolling processes, high-speed wire rods require cooling after rolling. The most common cooling method is water cooling boxes. However, current water cooling boxes have the following problems: First, traditional water cooling boxes use single water pressure control, resulting in cooling rate fluctuations of ±8℃ / s, leading to a core-to-surface temperature difference of >50℃; second, manual valve adjustment takes >30s, making it impossible to adapt to changes in rolling speed (such as cooling mismatch when the rolling speed changes from 30m / s to 36m / s); and third, energy consumption is too high, with fixed-diameter nozzles resulting in ineffective water consumption of ≥25%.

[0003] Current multi-stage water-cooled tanks only adjust cooling by the length of the partitions and cannot achieve dynamic flow control. If only solenoid valves are used to control the water volume, the response time is greater than 5 seconds, making it impossible to achieve second-level closed-loop regulation. In view of this, we conducted in-depth research on the above problems, which led to this case. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a staged temperature-controlled water-cooled box, which solves the existing background technology problems.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a staged temperature-controlled water-cooled box, including a cooling box body, the cooling box body is installed on one side of the rolling mill, the two ends of the cooling box body are symmetrically provided with an inlet and an outlet, the cooling box body is provided with a plurality of mounting holes along the axial direction, a plurality of cooling nozzles are assembled in the plurality of mounting holes, and a water supply pipeline is provided on the cooling box body;

[0006] The water supply pipeline is connected to several cooling nozzles. Several dynamic flow valves are installed on the water supply pipeline. A water pump is connected to one side of the water supply pipeline. The cooling box is divided into multiple cooling zones along a gradient from the inlet to the outlet. The nozzle orifice diameter of the cooling nozzles decreases sequentially from the inlet to the outlet.

[0007] The water supply pipeline is provided with several branch pipes corresponding to multiple cooling sub-areas. Each branch pipe corresponds to a dynamic flow valve. The diameter of the several branch pipes decreases sequentially from the inlet to the outlet.

[0008] The bottom of the cooling box is provided with multiple flow collection channels corresponding to multiple cooling zones. The flow collection channels are provided with guide pipes, and the guide pipes are connected to drain pipes.

[0009] Preferably, the flow regulation of the dynamic flow valve satisfies the relationship Q = 0.02v^ 2+1.5v, Q is in L / min, v is the rolling speed in m / s.

[0010] Preferably, the water supply pipeline is provided with a plurality of connecting seats, and the connecting seats are connected to the branch pipe via flanges.

[0011] Preferably, the inner cavities of the water supply pipe, the several branch pipes, and the several cooling nozzles are all coated with a Teflon coating.

[0012] Preferably, the flow collecting trough is a conical hollow shell, and the bottom end of the flow collecting trough is connected to the guide pipe through a threaded structure.

[0013] Preferably, the top of the cooling box is provided with several support seats, and several pipe clamps are installed on the several support seats to fix the water supply pipeline.

[0014] Beneficial effects

[0015] This invention provides a staged temperature-controlled water-cooled box. It offers the following advantages: This staged cooling system, through dual control of spatial gradient and time dynamics, reduces the core-to-surface temperature difference of wire rod from 50℃ in traditional processes to below 15℃, improving cooling uniformity by 70%. When the rolling speed changes abruptly, the differentiated response characteristics of the three-level zones create a buffering effect. The roughing cooling zone quickly adjusts the basic cooling intensity, while the finishing cooling zone finely adjusts to complete closed-loop temperature control. Compared to the solenoid valve staged control method, the overall system response time is shortened to 1.2 seconds, and water consumption is reduced by 30%, providing a refined cooling solution for high-speed wire rod temperature control rolling. Attached Figure Description

[0016] Figure 1 This is a first three-dimensional structural diagram of a staged temperature-controlled water-cooled box according to the present invention.

[0017] Figure 2 This is a second three-dimensional structural diagram of a staged temperature-controlled water-cooled box according to the present invention.

[0018] Figure 3 This is a cross-sectional structural diagram of a staged temperature-controlled water-cooled box according to the present invention.

[0019] In the diagram: 1. Cooling box; 2. Inlet; 3. Outlet; 4. Cooling nozzle; 5. Water supply pipeline; 6. Dynamic flow valve; 7. Water supply pump; 8. Diverter pipe; 9. Collector trough; 10. Drain pipe; 11. Connector; 12. Support base; 13. Pipe clamp. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 This utility model provides an implementation scheme: In the modern high-speed wire rod rolling process, in order to fully cool the wire rod, it is often necessary to fully cool the wire rod with water. The current water cooling box has the following problems: First, the traditional water cooling box uses a single water pressure control, and the cooling rate fluctuates by ±8℃ / s, resulting in a core-to-surface temperature difference of >50℃; Second, manual valve adjustment takes >30s, which cannot adapt to changes in rolling speed (such as cooling mismatch when the rolling speed changes from 30m / s to 36m / s); The energy consumption is too high, the fixed orifice nozzle results in an ineffective water consumption ratio of ≥25%, and most of them use solenoid valves to control the water volume, with a response time of >5s, which cannot achieve second-level closed-loop adjustment.

[0022] To address the technical shortcomings of traditional water-cooled boxes, such as uneven cooling, slow response, and excessive energy consumption, according to the instruction manual... Figure 1-3 As can be seen, this application discloses a staged temperature-controlled water-cooled box, including a cooling box body 1, which is installed on one side of the rolling mill. The cooling box body 1 has an inlet 2 and an outlet 3 symmetrically arranged at both ends. The cooling box body has a number of mounting holes arranged along the axial direction, and a number of cooling nozzles 4 are installed in the mounting holes. The cooling box body 1 is provided with a water supply pipeline 5. The cooling box body 1 is for staged temperature control. Through the gradient cooling system and dynamic flow control, the precise control of the wire cooling process is realized.

[0023] The specific water supply pipeline 5 is connected to several cooling nozzles 4. Several dynamic flow valves 6 are installed on the water supply pipeline 5. A water supply pump 7 is connected to one side of the water supply pipeline 5. The cooling box 1 is divided into multiple cooling zones along the gradient from the inlet 2 to the outlet 3. The multi-level cooling zones divided along the axial direction of the cooling box 1 form a three-level temperature field of "coarse cooling-medium cooling-fine cooling": the inlet 2 section is equipped with Φ8mm large-diameter nozzles to implement rapid cooling with high water pressure (0.8MPa) so that a stable cooling film is formed on the surface of the wire; the middle section Φ5mm nozzles enhance heat exchange through vortex water flow and gradually reduce the core-surface temperature difference; the outlet 3 section Φ3mm micro-pore array generates atomized cooling (droplet diameter ≤100μm), which eliminates residual thermal stress while controlling the martensitic phase transformation rate.

[0024] Each zone's independent branch pipe 8, through a gradually narrowing flow channel design, allows the water pressure to gradually decrease from 0.8MPa to 0.3MPa, in conjunction with the dynamic flow valve 6 at Q=0.02v. 2The +1.5V automatic adjustment of total flow rate ensures that when the rolling speed increases from 30m / s to 36m / s, the system can smoothly switch the flow rate from 207L / min to 291L / min within 3 seconds, ensuring that the water flow speed in each cooling zone is dynamically matched with the wire travel speed.

[0025] As a preferred option, the flow regulation formula of the dynamic flow valve 6 is further corrected in real time through rolling speed feedback. When the rolling mill accelerates, the valve core opening increases with the square of the speed, which enhances the nonlinear cooling intensity and effectively suppresses insufficient cooling caused by the shortening of wire residence time, controlling the cooling rate fluctuation within ±1.5℃ / s.

[0026] As a preferred option, the water supply pipe 5 and the branch pipe 8 adopt a detachable structure with flange connection, and with the inner cavity treatment of Teflon coating thickness of at least 50μm, which not only reduces the frictional resistance of the flow channel, but also facilitates the quick replacement of the matching nozzle module according to different wire diameters.

[0027] As a preferred option, the conical collection trough 9 further achieves graded drainage through the bottom threaded guide pipe. The large flow of wastewater in the coarse cooling zone is preferentially discharged through the Φ80mm pipe, while the fine atomized water in the fine cooling zone is recycled through the Φ25mm pipe. The slope design further improves the water recycling efficiency.

[0028] As a preferred option, the water supply pipeline 5 system fixed by the clamp 13 forms an elastic connection structure with the support 12, which effectively absorbs pipeline vibration caused by high-pressure water flow, prevents nozzle displacement due to mechanical resonance, and ensures that the jet angle deviation of each cooling zone is <0.5°.

[0029] In summary, this segmented cooling system, through dual control of spatial gradient and temporal dynamics, reduces the core-to-surface temperature difference of wire rod from 50℃ in traditional processes to below 15℃, improving cooling uniformity by 70%. When the rolling speed changes abruptly, the differentiated response characteristics of the three-level zones create a buffering effect. The rough cooling zone quickly adjusts the basic cooling intensity, while the fine cooling zone finely adjusts to complete closed-loop temperature control. Compared with the solenoid valve segmented control method, the overall system response time is shortened to 1.2 seconds, and water consumption is reduced by 30%, providing a refined cooling solution for temperature-controlled rolling of high-speed wire rod.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stage temperature controlled water cooled box comprising a cooling box body (1) installed at one side of a rolling mill, symmetrical inlet (2) and outlet (3) are arranged at both ends of the cooling box body (1), characterized in that, The cooling box is provided with a number of mounting holes along the axial direction, and a number of cooling nozzles (4) are assembled in the mounting holes. The cooling box body (1) is provided with a water supply pipe (5). The water supply pipeline (5) is connected to several cooling nozzles (4). Several dynamic flow valves (6) are installed on the water supply pipeline (5). A water supply pump (7) is connected to one side of the water supply pipeline (5). The cooling box (1) is divided into multiple cooling zones along the gradient from the inlet (2) to the outlet (3). The nozzle diameter of the several cooling nozzles (4) decreases sequentially from the inlet (2) to the outlet (3). The water supply pipeline (5) is provided with several branch pipes (8) corresponding to multiple cooling sub-areas. Each branch pipe (8) corresponds to a dynamic flow valve (6). The diameter of the several branch pipes (8) decreases sequentially from the inlet (2) to the outlet (3). The bottom of the cooling box (1) is provided with multiple collection channels (9) corresponding to multiple cooling zones. The collection channels (9) are provided with guide pipes, and the guide pipes are connected to drain pipes (10).

2. A temperature zoned water cooled cabinet as claimed in claim 1, wherein, The flow regulation of the dynamic flow valve (6) satisfies the relationship Q=0.02v^2+1.5v, where Q is in L / min and v is the rolling speed in m / s.

3. A temperature zoned water cooled cabinet as claimed in claim 2, wherein, The water supply pipeline (5) is provided with several connecting seats (11), and the connecting seats (11) are connected to the diversion pipe (8) through flanges.

4. A temperature zoned water cooled cabinet as claimed in claim 3, wherein, The inner cavities of the water supply pipe (5), several branch pipes (8), and several cooling nozzles (4) are all coated with Teflon coating.

5. A staged temperature-controlled water-cooled box according to claim 4, characterized in that, The collecting trough (9) is a conical hollow shell, and the bottom end of the collecting trough (9) is connected to the guide pipe through a threaded structure.

6. A temperature zoned water cooled cabinet as claimed in claim 5 wherein, The top of the cooling box (1) is provided with several support seats (12), and several pipe clamps (13) are installed on the several support seats (12) to fix the water supply pipe (5).

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