A hot rolling laminar flow spray header calibration and desilting device and its use method

Abstract

The present invention discloses a hot rolling laminar flow lower spray header calibration and dredging device and its use method. The device includes a lower spray main pipe and a high-pressure flushing trolley structure. A plurality of small water spray pipes with equal spacing are welded on the lower spray main pipe; a right sealing plate is welded to the end face of the lower spray main pipe; a straight-through quick-connect male connector is provided on the right sealing plate; a damping baffle is welded inside the lower spray main pipe, and the damping baffle is separated from the right sealing plate by a certain distance, so that a steady flow cavity is formed in the lower spray main pipe. By periodically arranging the use of this device to measure and calibrate the water volume of the lower header during maintenance and roll change shutdowns, and performing dredging work at the same time, and continuously adhering to the above operations and maintaining them properly, the water quality and cooling effect of the lower spray are greatly improved, and at the same time, it is also possible to quickly clear blocked scale online without stopping production.

Description

Technical Field

[0001] The invention relates to the technical field of hot-rolled thin plate production, in particular to a hot-rolled laminar flow spray header calibration and silt removal device and a use method thereof. Background Art

[0002] The laminar flow cooling system of a hot-rolled sheet production line rapidly cools the strip exiting the finishing mill to the set target coiling temperature to ensure optimal strip performance. The lower spray header in the laminar flow cooling system primarily cools the lower surface of the strip. Uneven cooling can lead to uneven internal structure and localized buckling of the strip. Uniformity is primarily dependent on the uniformity of the laminar cooling water.

[0003] The laminar cooling lower spray manifold consists of a main manifold and smaller spray pipes attached to it. Each manifold has a varying number of smaller spray pipes evenly distributed along its length. Due to long-term water corrosion and high temperatures, the smaller spray pipes can become scaled, resulting in reduced water flow and uneven cooling. Regular calibration and comparison are required, and serious issues require immediate offline processing. Typical calibration and comparisons rely on visual inspection to determine whether the flow rate of each smaller spray pipe is normal. However, the lack of quantitative records makes trend analysis impossible.

[0004] Furthermore, during normal production on the production line, debris inevitably enters the water used in the laminar cooling system. Furthermore, because the bottom spray headers of the production line's laminar cooling equipment operate by spraying upward, a large amount of debris accumulates at the bottom of the headers over time, affecting the strip cooling effect and requiring timely unclogging. This involves opening the end cap at one end of the header and flushing it with water during a rolling line shutdown. The laminar bottom spray headers of hot-rolled sheet production lines typically feature a design with water entering at one end and an end cap installed at the other. Each time the end caps are removed and installed for header flushing, the operation takes a long time. Only a few headers can be flushed during each shutdown; this not only consumes a significant amount of manpower, but also prevents most headers from being cleaned promptly.

[0005] After searching, there are many methods for calibrating the upper spray header of laminar cooling, but there are not many calibration methods involving the lower spray header. The existing publication number is CN205042892U, which discloses a rapid calibration device for the position of the lower spray header of hot rolling laminar cooling. The device can only calibrate the position of the fine water collecting pipe through the device to ensure the position accuracy, but it cannot calibrate the flow and blockage conditions.

[0006] The patent related to the drainage of the lower manifold is published with the publication number CN203830435U, which discloses a laminar flow manifold lower spray manual drainage device. The device describes a method of controlling the opening and closing of the drainage outlet by driving the sealing gasket to rise and fall through a handle. However, the environment in which the lower manifold is located is relatively harsh, and the accumulated dirt cannot be completely removed at one time, and will accumulate at the drainage outlet, causing the sealing gasket to leak.

[0007] Publication number CN215587385U discloses a laminar cooling lower header with a sewage discharge function, and describes a cleaning rod with a built-in cleaning brush and scraper. However, the problems of gasket leakage and obstruction of the cleaning rod movement also occur.

[0008] Publication number CN218638218U discloses a laminar cooling device for a hot-rolled thin plate production line and describes a method for quickly draining waste through the plate handle joints. However, this can only be done by flushing during shutdown, and real-time cleaning cannot be achieved.

[0009] Publication number CN203725506U discloses a laminar cooling lower header with a dredging function, describing a method for rapid drainage of visible accumulated dirt. However, this can only be done by disassembling the end cover and flushing it during shutdown, which requires a lot of manpower and most headers cannot be cleaned in time.

[0010] Therefore, the applicant, based on many years of rich experience in design, development and actual production in the relevant industry, has conducted research and improvements on the existing structure and deficiencies, and provided a hot-rolled laminar flow spray header calibration and dredging device and its use method, in order to achieve a more practical purpose. Summary of the Invention Summary of the Invention

[0012] (1) Technical problems solved

[0013] In response to the shortcomings of the existing technology, the present invention provides a hot rolling laminar flow lower spray header calibration and silt removal device and its use method, which solves the problems of achieving accurate calibration of the cooling water volume of the lower header and scaling trend analysis, and the problem of being able to quickly clear blocked scale online without stopping production.

[0014] (2) Technical solution

[0015] To achieve the above objectives, the present invention is implemented through the following technical solutions: a hot-rolled laminar flow lower spray header rapid calibration and silt removal device, comprising a lower spray main pipe and a high-pressure flushing trolley structure, the lower spray main pipe being welded with a plurality of small water spray pipes with equal spacing; the end face of the lower spray main pipe being sealed and welded with a right sealing plate; a straight-through quick-connect male connector component being provided on the right sealing plate; a damping baffle being welded inside the lower spray main pipe, the damping baffle being separated from the right sealing plate by a certain distance, so that a steady flow cavity is formed in the lower spray main pipe;

[0016] A left flange is welded to the other side of the lower spray main pipe, and a three-way ball valve is fixed to the left flange by bolts; a right flange pipe is installed on the inlet flange of the three-way ball valve; the right flange pipe is connected to the laminar flow inlet pipe via a hose; a water level marking pipe is installed on the other side of the three-way ball valve, on which a scale value is marked; a rubber plug is provided on the water level marking pipe;

[0017] The lower spray main pipe is provided with a plurality of bases which are fixed on the laminar flow roller base.

[0018] Preferably, the high-pressure washing trolley structure includes a trolley on which a return pipe is placed; one end of the return pipe is connected to a pressure regulating valve for adjusting a suitable calibration pressure;

[0019] One end of the pressure regulating valve is connected to a high-pressure pump, which can quickly provide high-pressure power; the high-pressure pump is provided with a filter, and after water passes through the filter cartridge of the filter screen, its impurities can be blocked. When cleaning is required, just take out the detachable filter cartridge, treat it and reinstall it; the filter is connected to a water tank with a partition, and the partition can reduce the fluctuation and turbulence inside the water tank, prevent the water body from causing impact and pressure on the water tank during the push of the trolley, thereby improving the stability of the water tank, and can also increase the structural strength of the water tank and enhance its pressure resistance.

[0020] The other end of the pressure regulating valve is connected to a high-pressure hose, which can withstand high pressure; a flow meter is provided on the high-pressure hose for observing the stability of the flow in the pipe; a flushing hose is provided on the high-pressure hose; a pressure water gun is provided under the flushing hose; a straight-through quick-release connector female component is provided at one end of the flushing hose, which is movably connected to the quick-release connector male component.

[0021] Preferably, the spacing between the multiple small water spray pipes is equal, and the inclination angle is 15°.

[0022] Preferably, the lower portion of the damping baffle is left hollow for flushing out scale, and the upper portion is opened to buffer and stabilize the flow rate and pressure of the pressurized water.

[0023] Preferably, there are two of the plurality of bases, which are welded to the lower spray main pipe and fixed to the laminar roller base.

[0024] Preferably, the high-pressure hose is made of polyester, with an outer shell woven from polyester fibers and an inner layer coated with polyurethane or PVC and other materials. It has good wear resistance and flexure resistance and is light in weight, making it easy to transport.

[0025] Preferably, the pressure water gun and flushing hose are made of rubber material, such as nitrile rubber, which has good wear resistance, aging resistance and oil resistance; the end of the pressure water gun is installed in a straight-through type.

[0026] A method for using a hot rolling laminar flow spray header calibration and desilting device, the specific steps are as follows:

[0027] S1: When laminar flow water spraying is required during normal production, first turn the handle of the three-way ball valve to the straight-through position;

[0028] S2: After opening the pneumatic opening valve of the main water pipe, the laminar water flows through the hose to the right flange pipe and then to the three-way ball valve, and then enters the lower spray main pipe through the straight-through cavity;

[0029] S3: Finally, water is sprayed out from several small water spray pipes to reach the lower surface of the cooling steel plate.

[0030] A method for calibrating the water volume of a hot rolling laminar flow spray header and a silt removal device, the specific steps of which are as follows:

[0031] S1: First, turn the handle of the three-way ball valve to the bypass position;

[0032] S2: At this time, disconnect the lower spray main from the main water inlet pipe and connect it to the water level mark pipe, then move the high-pressure flushing trolley to the vicinity of the lower spray main that needs to be calibrated;

[0033] S3: Adjust the pressure regulating valve to the appropriate calibration pressure;

[0034] S4: Connect the female part of the straight-through quick-release connector to the male part of the straight-through quick-release connector provided on the right sealing plate, and then turn on the high-pressure pump and the pressure water gun;

[0035] S5: At this time, the calibrated pressure water passes through the high-pressure hose to the pressure water gun, and then to the straight-through quick-release connector female component and the quick-release connector male component, and enters the damping partition to form a steady flow cavity. After the flow is stable, it enters and is sprayed out by several small water spray pipes;

[0036] S6: Finally, observe the flow meter and wait for the flow to stabilize. Then read the scale value on the water level mark tube and record it.

[0037] A maintenance method for a hot rolling laminar flow spray header calibration and desilting device, the specific steps are as follows:

[0038] S1: First, increase the pressure of the pressure regulating valve. At this time, high-pressure water flows through the high-pressure hose to the pressure water gun, and then to the straight-through quick-release connector female component and quick-release connector male component, enters the lower cavity of the damping partition, and enters the lower spray main pipe to flush out the deposited impurities;

[0039] S2: Since the water level mark pipe is relatively thick, most of the sewage will be discharged from this port. When flushing, the flushing hose can be replaced, and the water level mark pipe should be facing the slag ditch and discharged into the slag ditch;

[0040] S3: You can also use a rubber plug to seal the upper pipe opening of the water level mark pipe, so that high-pressure water will be sprayed out from each small water spray pipe to achieve the purpose of clearing the scale in the small water spray pipe.

[0041] The present invention provides a device for calibrating and desilting a hot rolling laminar flow spray header and a method for using the device. The device has the following beneficial effects:

[0042] (1) By installing a three-way ball valve, the lower header can be placed in an offline or online state, allowing water calibration and dredging to be performed anytime and anywhere;

[0043] (2) The flushing pressure can be increased by using a mobile high-pressure flushing trolley. The calibration and flushing pressure can be adjusted. For manifolds with heavy fouling, cleaning agents can be used to quickly dissolve the dirt and achieve the flushing purpose. The flushing method is flexible and fast, and can be implemented without stopping production if necessary.

[0044] (3) Through the recording and statistics of scales, the blockage status of each header can be quantitatively tracked;

[0045] (4) The angle of the small water spray pipe is adjusted to 15°, which can effectively form a water film under the steel plate to prevent impurities from falling into and blocking the small water spray pipe. The increased back-splashing water volume can improve the cooling effect of the laminar roller conveyor.

[0046] (5) The flow stabilization cavity at the end can effectively improve the turbulent flow condition at the end, and at the same time can buffer the velocity impact of the water inlet during calibration.

[0047] In summary, by periodically arranging the use of this device to measure and calibrate the water volume in the lower header during maintenance and roller replacement, and carrying out silt removal work at the same time, and continuously adhering to the above operations and proper maintenance, the water quality and cooling effect of the lower spraying are greatly improved. At the same time, it is also possible to quickly clear the blocked scale online without stopping production. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 Schematic diagram of the structure of the present invention Figure 1 ;

[0049] Figure 2 Schematic diagram of the structure of the present invention Figure 2 ;

[0050] Figure 3 This is a structural diagram of a high-pressure washing trolley;

[0051] In the figure: 10 lower sprinkler main pipe, 11 small sprinkler pipe, 13 base, 14 damping partition, 15 right sealing plate, 16 left flange,

[0052] 20 quick-release connector male parts, 30 three-way ball valve, 40 right flange pipe, 50 hose, 60 water level mark pipe, 70 hand trolley, flushing hose 80, 90 rubber plug,

[0053] 71 water tank with baffle, 72 filter, 73 high-pressure pump, 74 pressure regulating valve, 75 return pipe, 76 flow meter, 77 high-pressure hose, 78 pressure water gun, 201 quick-release connector female part. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0055] See also Figure 1-3 The present invention provides a technical solution: a hot-rolled laminar flow lower spray header rapid calibration and desilting device, comprising a lower spray main pipe 10 and a high-pressure flushing trolley structure, wherein a plurality of small water spray pipes 11 with equal spacing are welded to the lower spray main pipe 10; a right sealing plate 15 is welded to the end face of the lower spray main pipe 10; a straight-through quick-connect male connector component 20 is provided on the right sealing plate 15; a damping baffle 14 is welded inside the lower spray main pipe 10, and the damping baffle 14 is separated from the right sealing plate 15 by a certain distance, so that a steady flow cavity is formed in the lower spray main pipe 10;

[0056] A left flange 16 is welded to the other side of the lower spray main pipe 10, to which a three-way ball valve 30 is bolted. A right flange pipe 40 is mounted on the inlet flange of the three-way ball valve 30. The right flange pipe 40 is connected to the laminar flow inlet pipe via a hose 50. A water level marking pipe 60 with scale values ​​is mounted on the other side of the three-way ball valve 30. A rubber plug 90 is provided on the water level marking pipe 60.

[0057] A plurality of bases 13 are provided on the lower spray main pipe 10 and fixed on the laminar flow roller base.

[0058] The high-pressure washing trolley structure includes a trolley 70, on which a return pipe 75 is placed; one end of the return pipe 75 is connected to a pressure regulating valve 74 for adjusting the appropriate calibration pressure;

[0059] One end of the pressure regulating valve 74 is connected to a high-pressure pump 73, which can quickly provide high-pressure power; a filter 72 is provided on the high-pressure pump 73, and after water passes through the filter cartridge of the filter screen, its impurities can be blocked. When cleaning is required, just take out the detachable filter cartridge, process it and reinstall it; the filter 72 is connected to a water tank 71 with a partition, and the partition can reduce the fluctuation and turbulence inside the water tank, prevent the water body from causing impact and pressure on the water tank during the push of the trolley, thereby improving the stability of the water tank. In addition, the partition can also increase the structural strength of the water tank and enhance its pressure resistance.

[0060] The other end of the pressure regulating valve 74 is connected to a high-pressure hose 77, which can withstand high pressure; a flow meter 76 is provided on the high-pressure hose 77 for observing the stability of the flow in the pipe; a flushing hose 80 is provided on the high-pressure hose 77; a pressure water gun 78 is provided under the flushing hose 80; a straight-through quick-connect female connector component 201 is provided at one end of the flushing hose 80, which is movably connected to the quick-connect male connector component 20.

[0061] The spacing between the plurality of small water spray pipes 11 is equal, and the inclination angle is 15°.

[0062] The lower portion of the damping baffle 14 is left hollow for flushing out dirt, and the upper portion has openings for buffering and stabilizing the flow rate and pressure of the pressurized water.

[0063] There are two bases 13 welded to the lower spray main pipe 10 and fixed to the laminar roller base.

[0064] The high-pressure hose 77 is made of polyester, with an outer shell woven from polyester fibers and an inner layer coated with polyurethane or PVC. It has good wear resistance and flexure resistance and is light in weight, making it easy to transport.

[0065] The pressure water gun 78 and the flushing hose 80 are made of rubber, and are made of nitrile rubber, which has good wear resistance, aging resistance and oil resistance. The end of the pressure water gun 78 is installed in a straight-through type.

[0066] A method for using a hot rolling laminar flow spray header calibration and desilting device, the specific steps are as follows:

[0067] S1: When laminar flow water spraying is required during normal production, first turn the handle of the three-way ball valve 30 to the straight-through position;

[0068] S2: After the pneumatic opening valve of the main water pipe is opened, the laminar water flows through the hose 50 to the right flange pipe 40 and then to the three-way ball valve 30, and enters the lower spray main pipe 10 through the straight-through cavity;

[0069] S3: Finally, water is sprayed out from several small water spray pipes 11 and reaches the lower surface of the cooling steel plate.

[0070] A method for calibrating the water volume of a hot rolling laminar flow spray header and a silt removal device, the specific steps of which are as follows:

[0071] S1: First, turn the handle of the three-way ball valve 30 to the bypass position;

[0072] S2: At this time, the lower spray main pipe 10 is disconnected from the main water inlet pipe and connected to the water level marking pipe 60, and then the high-pressure flushing trolley 70 is moved to the vicinity of the lower spray main pipe 10 to be calibrated;

[0073] S3: Adjust the pressure regulating valve 74 to a suitable calibration pressure;

[0074] S4: Connect the female part 201 of the straight-through quick-connector to the male part 20 of the straight-through quick-connector provided on the right sealing plate 15, and then turn on the high-pressure pump 73 and the pressure water gun 78;

[0075] S5: At this time, the calibrated pressure water passes through the high-pressure hose 77 to the pressure water gun 78, and then to the straight-through quick-release connector female component 201 and the quick-release connector male component 20, and enters the damping partition 14 to form a steady flow cavity. After the flow is stabilized, it enters and is sprayed out by several small water spray pipes 11;

[0076] S6: Finally, observe the flow meter 76 and wait for the flow to stabilize, then read the scale value on the water level marking tube 60 and record it.

[0077] When the pressure of the flushing trolley is consistent and the flow rate is stable and consistent, the flow rate entering each lower spray header during calibration is consistent. Due to different scale and blockage conditions in the small spray pipes 11, the spray flow rate is inconsistent, resulting in different scale values ​​displayed on the water level marking tube 60, and sometimes overflow from the upper part of the water level marking tube 60;

[0078] When the water level of the marked pipe with serious blockage is higher, record the corresponding scale value to reflect the blockage condition of the lower sprinkler header. If it exceeds the specified value, dredging or offline maintenance is required;

[0079] A maintenance method for a hot rolling laminar flow spray header calibration and desilting device, the specific steps are as follows:

[0080] S1: First, the pressure of the pressure regulating valve 74 is increased. At this time, high-pressure water flows through the high-pressure hose 77 to the pressure water gun 78, and then to the straight-through quick-release connector female component 201 and the quick-release connector male component 20, enters the lower cavity of the damping partition 14, and enters the lower spray main 10 to flush out the deposited impurities;

[0081] S2: Since the water level marking tube 60 is relatively thick, most of the sewage will be discharged from this outlet. When flushing, the flushing hose 80 can be replaced, and the water level marking tube 60 is facing the slag ditch and discharged into the slag ditch; or a rubber plug 90 can be used to seal the upper pipe opening of the water level marking tube 60, so that high-pressure water will be sprayed out from each small water spray pipe 11 to achieve the purpose of clearing the scale in the small water spray pipe 11.

[0082] In summary, by periodically arranging the use of this device to measure and calibrate the water volume in the lower header during maintenance and roller replacement, and carrying out silt removal work at the same time, and continuously adhering to the above operations and proper maintenance, the water quality and cooling effect of the lower spraying are greatly improved. At the same time, it is also possible to quickly clear the blocked scale online without stopping production.

[0083] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0084] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hot rolling laminar flow lower spray header rapid calibration and silt removal device, comprising a lower spray main pipe (10) and a high-pressure flushing trolley structure, characterized in that: A plurality of small water spray pipes (11) with equal spacing are welded to the lower spray main pipe (10); a right sealing plate (15) is sealed and welded to one end face of the lower spray main pipe (10); a straight-through quick-connect male connector component (20) is provided on the right sealing plate (15); a damping baffle (14) is welded inside the lower spray main pipe (10), and the damping baffle (14) is separated from the right sealing plate (15) by a certain distance, so that a steady flow cavity is formed inside the lower spray main pipe (10); A left flange (16) is welded to the other side of the lower spray main pipe (10), and a three-way ball valve (30) is fixed to the left flange (16) by bolts; a right flange pipe (40) is installed on the inlet flange of the three-way ball valve (30); the right flange pipe (40) is connected to the laminar flow water inlet pipe via a rubber hose (50); a water level marking pipe (60) is installed on the other side of the three-way ball valve (30), and a scale value is marked on it; a rubber plug (90) is provided on the water level marking pipe (60); The lower spray main pipe (10) is provided with a plurality of bases (13), which are fixed on the laminar roller base.

2. The device for rapid calibration and desilting of a hot rolling laminar flow spray header according to claim 1, characterized in that: The high-pressure washing trolley structure includes a trolley (70), on which a return pipe (75) is placed; one end of the return pipe (75) is connected to a pressure regulating valve (74) for facilitating adjustment of a suitable calibration pressure; One end of the pressure regulating valve (74) is connected to a high-pressure pump (73) capable of quickly providing high-pressure power; a filter (72) is provided on the high-pressure pump (73); after water passes through the filter cartridge of the filter screen, its impurities can be blocked; when cleaning is required, the detachable filter cartridge can be taken out and reinstalled after treatment; the filter (72) is connected to a water tank (71) with a partition, and the partition can reduce the fluctuation and turbulence inside the water tank, preventing the water body from causing impact and pressure on the water tank during the push of the trolley, thereby improving the stability of the water tank, and also increasing the structural strength of the water tank and enhancing its pressure resistance; The other end of the pressure regulating valve (74) is connected to a high-pressure hose (77) capable of withstanding high pressure; a flow meter (76) is provided on the high-pressure hose (77) for observing the stability of the flow in the pipe; a flushing hose (80) is provided on the high-pressure hose (77); a pressure water gun (78) is provided under the flushing hose (80); and a straight-through quick-connect female connector component (201) is provided at one end of the flushing hose (80), which is movably connected to the quick-connect male connector component (20).

3. The device for rapid calibration and desilting of a hot rolling laminar flow spray header according to claim 1, characterized in that: The spacing between the plurality of small water spray pipes (11) is equal, and the inclination angle is 15°.

4. The device for rapid calibration and desilting of a hot rolling laminar flow spray header according to claim 1, characterized in that: The lower portion of the damping baffle (14) is left hollow for flushing out dirt, and the upper portion has holes for buffering and stabilizing the flow rate and pressure of the pressurized water.

5. The device for rapid calibration and desilting of hot rolling laminar flow spray headers according to claim 1, characterized in that: There are two of the multiple bases (13), which are welded to the lower spray main pipe (10) and fixed to the laminar roller base.

6. The device for rapid calibration and desilting of a hot rolling laminar flow spray header according to claim 2, characterized in that: The high-pressure hose 77 is made of polyester, with an outer shell woven from polyester fibers and an inner layer coated with polyurethane or PVC material. It has good wear resistance and flex resistance and is light in weight.

7. The device for rapid calibration and desilting of a hot rolling laminar flow spray header according to claim 2, characterized in that: The pressure water gun (78) and the flushing hose (80) are made of rubber material, and are made of nitrile rubber, which has good wear resistance, anti-aging and oil resistance. The end of the pressure water gun (78) is installed in a straight-through type.

8. A method for using a hot rolling laminar flow spray header calibration and desilting device, characterized in that: The invention comprises a hot rolling laminar flow spray header rapid calibration and silt removal device as claimed in claim 1, and the specific steps are as follows: S1: When laminar flow water spraying is required during normal production, first turn the handle of the three-way ball valve (30) to the straight-through position; S2: After the pneumatic opening valve of the main water pipe is opened, the laminar water flows through the hose (50) to the right flange pipe (40) and then to the three-way ball valve (30), and enters the lower spray main pipe (10) through the straight-through cavity; S3: Finally, water is sprayed out from several small water spray pipes (11) and reaches the lower surface of the cooling steel plate.

9. A method for calibrating the water volume of a hot rolling laminar flow spray header and a silt removal device, characterized by: The invention comprises a hot rolling laminar flow spray header rapid calibration and silt removal device as claimed in claim 2, and the specific steps are as follows: S1: First, turn the handle of the three-way ball valve (30) to the bypass position; S2: At this time, the lower spray main pipe (10) is disconnected from the main water inlet pipe and connected to the water level mark pipe (60), and then the high-pressure flushing trolley (70) is moved to the vicinity of the lower spray main pipe (10) to be calibrated; S3: Adjust the pressure regulating valve (74) to the appropriate calibration pressure; S4: Connect the female part of the straight-through quick-release connector (201) to the male part of the straight-through quick-release connector (20) provided on the right sealing plate (15), and then turn on the high-pressure pump (73) and the pressure water gun (78); S5: At this time, the calibrated pressure water passes through the high-pressure hose (77) to the pressure water gun (78), and then to the straight-through quick-release connector female component (201) and the quick-release connector male component (20), and enters the damping partition (14) to form a steady flow cavity. After the steady flow, it enters and is sprayed out by a number of small spray pipes (11); S6: Finally, observe the flow meter (76) until the flow rate stabilizes, read the scale value on the water level marking tube (60), and record it.

10. A maintenance method for a hot rolling laminar flow spray header calibration and desilting device, characterized in that: The invention comprises a hot rolling laminar flow spray header rapid calibration and silt removal device as claimed in claim 2, and the specific steps are as follows: S1: First, the pressure of the pressure regulating valve (74) is increased. At this time, the high-pressure water flows through the high-pressure hose (77) and then to the pressure water gun (78), and then to the straight-through quick-release connector female component (201) and the quick-release connector male component (20), and then enters the lower cavity of the damping partition (14) and enters the lower spray main (10) to flush out the deposited impurities; S2: Since the water level marking pipe (60) is relatively thick, most of the sewage will be discharged from this outlet. The water level marking pipe (60) faces the slag ditch and discharges into the slag ditch, or a rubber plug (90) is used to seal the upper pipe opening of the water level marking pipe (60), so that high-pressure water will be sprayed from each small water spray pipe (11) to achieve the purpose of clearing the scale in the small water spray pipe (11).

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