Laminar cooling system for a hot strip production line

Abstract

The utility model discloses a laminar cooling system of hot rolled strip steel production line, including support device, cooling roll conveying device, side spray subassembly, upper spray subassembly and lower spray subassembly, upper spray subassembly includes spray pipe, water inlet pipe and distribution main pipe, and the bottom of every spray pipe is provided with multiple rows of spray orifices of equal interval, and the both sides of support device are provided with the telescopic adjusting mechanism of the sliding fit with every spray pipe both ends respectively, and the top middle installation of every spray pipe has distribution branch pipe, and the installation of distribution pipe main pipe and water inlet pipe has steady flow buffer, and is provided with filter assembly on water inlet pipe, and the structure of lower spray subassembly is same with the structure of upper spray subassembly, and the bottom of support device below lower spray subassembly is provided with wastewater collection groove, and the bottom of wastewater collection groove is installed with orifice plate. The device can not only realize the adjustment of the width size of cooling strip steel and the length range of spray, but also can realize the adjustment of water flow steady voltage and steady flow.

Description

Technical Field

[0001] This utility model belongs to the field of steel rolling production and processing technology, specifically relating to a laminar flow cooling system for a hot-rolled strip steel production line. Background Technology

[0002] Laminar flow cooling is a process technology used to control cooling on hot-rolled strip steel production lines. It achieves uniform and rapid cooling by spraying water in a layered manner onto the surface of the strip steel with low water pressure and large volume. Its core is to break through the vapor film on the surface of the strip steel by the laminar water flow to achieve a highly efficient cooling effect. Laminar flow cooling has the advantages of uniform cooling and high cooling efficiency. The laminar flow cooling system in a hot-rolled strip steel production line mainly includes a support device, a cooling roller conveyor, and a cooling unit. The cooling roller conveyor is mounted on the support device. The cooling unit includes an upper spray assembly, a side spray assembly, and a lower spray assembly. The upper spray assembly is located above the cooling roller conveyor and sprays water to cool the strip steel being conveyed from above. The lower spray assembly is located below the cooling roller conveyor and sprays water to cool the strip steel being conveyed from below. The side spray assemblies are located on both sides above the cooling roller conveyor and spray water to cool the sides of the strip steel being conveyed. Although the laminar flow cooling system with the above structure can achieve the final cooling effect of the strip steel, this structure has the following shortcomings in use: Firstly, The existing upper and lower spray assemblies have spray ranges adapted to the width of the cooling roller conveyor mechanism. When the cooling roller conveyor mechanism conveys strip steel with a relatively narrow cooling width, the spray length range of the upper and lower spray assemblies cannot be adjusted, and the upper and lower spray assemblies spray out equal amounts of cold water simultaneously, resulting in water waste. Secondly, the existing upper and lower spray assemblies have an unreasonable structural arrangement. They are directly connected to the water inlet pipe, and the water flow directly into the upper and lower spray assemblies through the water inlet pipe often becomes unstable, resulting in inconsistent water volumes entering the upper and lower spray assemblies. This leads to uneven distribution of cold water sprayed from the upper and lower spray assemblies, affecting the uniformity of strip steel cooling. Therefore, it is objectively necessary to develop a laminar flow cooling system for hot-rolled strip steel production lines with a reasonable structure that can achieve both adjustable spray range and stable water flow. Summary of the Invention

[0003] The purpose of this invention is to provide a laminar flow cooling system for a hot-rolled strip steel production line with a reasonable structure that can achieve both adjustable spray range and stable water flow.

[0004] The purpose of this utility model is achieved as follows: it includes a support device, a cooling roller conveying device, a side spray assembly, an upper spray assembly, and a lower spray assembly. The upper spray assembly includes spray pipes, an inlet pipe, and a distribution main pipe. There are multiple spray pipes, which are evenly spaced along the conveying direction of the cooling roller conveying device. The two ends of each spray pipe are fixedly installed on both sides of the support device. The bottom of each spray pipe is provided with multiple rows of spray holes at equal intervals, and adjacent rows of spray holes are staggered. The two sides of the support device are symmetrically provided with telescopic adjustment mechanisms that slide with the two ends of each spray pipe. A distribution branch pipe is installed in the middle of the top of each spray pipe. The end of the distribution branch pipe is connected to the distribution main pipe. A water pump is installed on the distribution branch pipe. A flow stabilizer is installed between the distribution main pipe and the inlet pipe. A filter assembly is installed on the inlet pipe. The structure of the lower spray assembly is the same as that of the upper spray assembly. A wastewater collection tank is provided at the bottom of the support device 1 below the lower spray assembly. A perforated plate is installed at the bottom of the wastewater collection tank.

[0005] Compared with existing technologies, the advantages of this device are as follows: First, the device optimizes the structure of the spray pipe by installing telescopic adjustment mechanisms at both ends. These mechanisms can adaptively adjust the ends of the spray pipe according to the width of the cooling strip, allowing for changes in the inner cavity of the spray pipe. This ensures that the spray length of each row of spray holes at the bottom of the spray pipe matches the width of the cooling strip, guaranteeing sufficient spraying while preventing over-spraying and avoiding water waste. Second, the device optimizes the structure of the upper and lower spray components. The water inlet pipes are set separately, which helps to ensure that the water volume entering the upper and lower spray components is uniform. At the same time, the water inlet pipes of the upper and lower spray components are optimized. The flow stabilizer installed on the water inlet pipe can realize the functions of stabilizing pressure and flow, ensuring that the water washing entering the spray pipe is stable and uniform. It can ensure that the water flow sprayed from the spray holes is smooth and there will be no uneven spraying. This is beneficial to improving the cooling effect of the strip steel. This device has the advantages of reasonable structural design, adjustable spray range, and stable spray water flow, and is easy to promote and use. Attached Figure Description

[0006] Figure 1 This is a front view schematic diagram of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is an enlarged schematic diagram of the telescopic adjustment mechanism 6 in this utility model; Figure 4 This is a front view schematic diagram of the current stabilizing buffer 7 in this utility model; Figure 5 This is a side view of the current-stabilizing buffer 7 in this utility model; Figure 6This is a schematic diagram of the structure of the filter component 8 in this utility model; In the diagram: 1-Support device, 2-Cooling roller conveyor device, 3-Side spray assembly, 4-Upper spray assembly, 41-Spray pipe, 42-Water inlet pipe, 43-Main distribution pipe, 44-Branch distribution pipe, 5-Lower spray assembly, 6-Telescopic adjustment mechanism, 61-Drive cylinder, 62-Moving rod, 63-Sealing plate, 64-Connecting plate, 65-Connecting rod, 66-Fixing pipe, 67-Slide plate, 68-First sealing plate, 69-Second sealing plate 610-Telescopic spring, 7-Flow stabilizer, 71-Tank body, 72-Flow stabilizer baffle, 73-Drain pipe, 74-Flow stabilizer pipe, 75-Sealing ring, 76-Connecting column, 77-Slot, 78-Limiting hole, 79-Limiting rod, 710-Limiting block, 711-Limiting spring, 8-Filter assembly, 81-Filter pipe, 82-Water baffle, 83-Baffle protrusion, 84-Elastic rod, 9-Wastewater collection tank, 10-Orifice plate. Detailed Implementation

[0007] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0008] like Figures 1-6As shown, this utility model includes a support device 1, a cooling roller conveying device 2, a side spray assembly 3, an upper spray assembly 4, and a lower spray assembly 5. The cooling roller conveying device 2 is a structure used in the prior art, including a frame, cooling rollers equally spaced on the frame, and a driver for rotating the cooling rollers. The side spray assembly 3 is a structure used in the prior art. The water inlet pipe of the side spray assembly 3 can be equipped with a structure similar to the flow stabilizer 7, which can improve the cooling effect on the strip steel by stabilizing the water flow. Each of the upper spray assemblies 4 includes a spray pipe 41, a water inlet pipe 42, and a distribution main pipe 43. The spray pipe 41 is a structure used in the prior art, with a rectangular structure at the bottom and an arc-shaped structure at the top. The bottom of the spray pipe 41 is rectangular with a flat bottom surface, which can increase the number of spray holes and improve the spraying effect. There are multiple spray pipes 41, which are equally spaced along the conveying direction of the cooling roller conveying device 2. Each spray pipe 41 is fixedly installed at both ends on both sides of the support device 1. Multiple rows of spray holes are evenly spaced at the bottom of each spray pipe 41, with adjacent rows of spray holes staggered. The number of spray holes in each row on the spray pipe 41 is determined according to actual use. Telescopic adjustment mechanisms 6 are symmetrically arranged on both sides of the support device 1, slidingly engaging with both ends of each spray pipe 41. A distribution branch pipe 44 is installed in the middle of the top of each spray pipe 41, with its end connected to the main distribution pipe 43. A water pump is installed on the distribution branch pipe 44. A flow stabilizer 7 is installed between the main distribution pipe 43 and the inlet pipe 42. The flow stabilizer 7 functions to stabilize pressure and flow. A filter assembly 8 is installed on the inlet pipe 42. The structure of the lower spray assembly 5 is the same as that of the upper spray assembly 4. A wastewater collection tank 9 is installed at the bottom of the support device 1 below the lower spray assembly 5, and a perforated plate 10 is installed at the bottom of the wastewater collection tank 9.

[0009] The system operates as follows: Cold water transported through the inlet pipe 42 is filtered by the filter assembly 8 to improve water quality and prevent blockage in subsequent pipes. The filtered cold water first enters the flow stabilizer 7, which regulates the water flow. When the cooling roller conveyor 2 conveys the hot-rolled strip requiring cooling, the cold water from the flow stabilizer 7 smoothly enters the main distribution pipe 73. Under the action of various pumps, it is distributed to the branch pipes 44 and finally enters the spray pipes 41, flowing smoothly out through the spray holes at the bottom of the spray pipes 41 to cool the upper surface of the strip. The water inlet method of the upper spray assembly 4 is the same as that of the lower spray assembly 5. The spray pipes 41 of the lower spray assembly 5 spray water from the top to the bottom surface of the strip. This system separates the inlet pipes of the upper spray assembly 4 and the lower spray assembly 5, which is advantageous... To ensure uniform water flow into the upper spray assembly 4 and lower spray assembly 5, the device incorporates a flow stabilizer 7 in the inlet pipe. This flow stabilizer 7 provides pressure and flow regulation, ensuring stable and uniform water washing within the spray pipe 41. It also ensures a smooth water flow from the spray holes, preventing uneven spraying and improving the cooling effect on the strip. During the cooling process, the wastewater can be collected in the collection tank 9 for further treatment and recycling. Furthermore, telescopic adjustment mechanisms 6 are installed at both ends of the spray pipe 41. These mechanisms can adaptively adjust the ends of the spray pipe 41 according to the width of the cooled strip, changing the inner cavity of the spray pipe 41. This ensures the spray length of each row of spray holes at the bottom of the spray pipe 41 matches the width of the cooled strip, guaranteeing sufficient cooling while preventing excessive spraying and water waste.

[0010] Furthermore, the telescopic adjustment mechanism 6 includes a drive cylinder 61, a movable rod 62, and a sealing plate 63. The drive cylinder 61 is a structure used in the prior art, and finished products are directly purchased according to the power required. The sealing plate 63 is slidably installed at one end inside the spray pipe 41. One end of the movable rod 62 is fixedly set to the sealing plate 63, and the other end of the movable rod 62 extends to the outside of the spray pipe 41 and is slidably set to the end of the spray pipe 41. The fixed end of the drive cylinder 61 is installed on the outside of the support device 1. A connecting plate 64 is installed on the movable end of the drive cylinder 61, and a connecting rod 65 is installed on the lower part of the connecting plate 64. The connecting rod 65 is connected to the other end of the movable rod 62 through an elastic connector. When it is necessary to adjust the spray length range at both ends of the spray pipe 41, the drive cylinder 61 is activated, and the movable end of the drive cylinder 61 extends or retracts, which can drive the connecting rod 65 to move through the connecting plate 64. During the movement of the connecting rod 65, the elastic element can be compressed or stretched. During the stretching process, the sealing plate 63 can be moved back and forth within the spray pipe 41 by the movable rod 62. The sealing plates 63 at both ends of the spray pipe 41 move away from or closer to each other, thereby adjusting the spray length range within the spray pipe 41 to match the width range of the strip steel. Preferably, the elastic connector includes a fixed pipe 66 and a sliding plate 67. The fixed pipe 66 has a first sealing plate 68 and a second sealing plate 69 installed at both ends, and the sliding plate 67 is slidably installed within the fixed pipe 66. The first sealing plate 68 has a sliding hole. The other end of the movable rod 62 passes through the sliding hole and is fixedly connected to the sliding plate 67. Multiple telescopic springs 610 are evenly distributed between the sliding plate 67 and the second sealing plate 69 inside the fixed tube 66. One end of the connecting rod 65 is fixedly connected to the second sealing plate 69. When the driving cylinder 61 pulls the fixed tube 66 through the connecting rod 65, the sliding plate 67 inside the fixed tube 66 will slide back and forth inside the fixed tube 66. The sliding of the sliding plate 67 can drive the movable rod 62 and the sealing plate 63 to slide back and forth.

[0011] Furthermore, in order to improve the cooling effect on the strip steel, the spray pipe 41 on the lower spray assembly 5 is located below the two cooling rollers of the cooling roller conveying device 2. The spray pipe 41 sprays water from between the two ends of the cooling rollers, which can better cool the bottom surface of the strip steel.

[0012] Furthermore, the flow stabilizing buffer 7 includes a tank 71 and a flow stabilizing baffle 72. The tank 71 adopts the existing stainless steel horizontal storage tank structure. The flow stabilizing baffle 72 is movably installed at the bottom inside the tank 71. A gap is left between the upper part of the flow stabilizing baffle 72 and the bottom of the tank 71. The flow stabilizing baffle 72 divides the inner cavity of the tank 71 into a water inlet chamber and a flow stabilizing chamber. The water inlet pipe 42 is located at the upper part of the water inlet chamber. A drain pipe 73 is provided at the bottom of the water inlet chamber. A drain valve is provided on the drain pipe 73. A flow stabilizing pipe 74 connected to the distribution main pipe 43 is provided at the bottom of the flow stabilizing chamber. A water outlet valve and a water outlet pump are provided on the flow stabilizing pipe 74. In use... Cold water enters the inlet chamber through the inlet pipe 42. The inlet chamber allows for further sedimentation and filtration of the cold water, reducing its impurity content and preventing clogging of the spray pipe 42. Sediment in the inlet chamber can be periodically discharged through the drain pipe 73. When the water level in the inlet chamber exceeds the height of the flow stabilizer 72, it overflows into the flow stabilizer chamber, which stores water to prevent negative pressure at the inlet pipe 42. It regulates water pressure and flow, ensuring a smoother flow through the main distribution pipe 43 and branch distribution pipes 44 into the spray pipe 41, guaranteeing a stable water flow into the spray pipe 41. Preferably, to ensure the stable installation of the flow stabilizer 72 on the tank 7... To prevent movement, a sealing ring 75 is provided between the flow stabilizing baffle 72 and the tank body 71. The sealing ring 75 seals the gap between the flow stabilizing baffle 72 and the tank body 71, improving the sealing performance between them. A connecting post 76 is fixedly installed through the middle of the flow stabilizing baffle 72. Slots 77 are symmetrically machined on the side wall of the tank body 71. The two ends of the connecting post 76 are respectively inserted into the corresponding slots 77. A cross-shaped groove is machined on one end of the connecting post 76. A limiting hole 78 corresponding to the cross-shaped groove is machined on the side wall of the tank body 71. A limiting rod 79 is installed in the limiting hole 78. One end of the limiting rod 79 is equipped with a snap-fit ​​section corresponding to the cross groove, which is inserted into the cross groove. The other end of the limiting rod 79 is equipped with a limiting block 710. A limiting spring 711 is installed on the limiting rod 79 between the limiting block 710 and the outer wall of the tank 71. Through the elasticity of the limiting spring 711, the limiting rod 79 can stably limit the position of the connecting column 76, thereby improving the installation stability of the flow stabilizing baffle 72. During use, a negative pressure suppressor can also be installed on the top of the tank 71 to facilitate the adjustment of hydrolysis and achieve a negative pressure-free function, making the water flow between the distribution main pipe 43 and the distribution branch pipe 44 more stable.

[0013] Preferably, the height of the flow stabilizing baffle 72 inside the tank 71 is higher than the radius of the tank 71, so that the water storage in the flow stabilizing cavity is sufficient and the water spray volume of the spray pipe 41 is sufficient.

[0014] Furthermore, the filter assembly 8 includes a filter tube 81, a baffle plate 82, and a baffle protrusion 83. The filter tube 81 is installed obliquely at the bottom of the inlet pipe 42, and the end of the filter tube 81 is sealed by a flange cover assembly. The baffle protrusion 83 is installed at the top of the inlet pipe 42 near the filter tube 81. The baffle plate 82 is installed on one side of the baffle protrusion 83 by an elastic rod 84. The upper part of the baffle plate 82 is hinged to the bottom of the inlet pipe 42. A water inlet channel is left between the lower part of the baffle plate 82 and the filter tube 81. The baffle plate 82 and the baffle protrusion 83 allow water to flow in the filter tube 81, which facilitates the sedimentation of impurities at the bottom of the filter tube 81, thus facilitating the preliminary filtration of cold water. The elasticity of the rubber rod reduces the obstruction of the baffle plate 82 to large water flows, improving the stability of the filter tube 81 during use. Preferably, in order to reduce the impact of large water flows on the baffle protrusion 83, the baffle protrusion 83 has a structure with low edges and high middle.

Claims

1. A laminar cooling system of a hot strip production line, comprising a support device (1), a cooling roller conveyor device (2), a side spray assembly (3), an upper shower assembly (4) and a lower shower assembly (5), characterized in that: The upper spray assembly (4) includes spray pipes (41), water inlet pipes (42), and distribution main pipes (43). There are multiple spray pipes (41) spaced evenly along the conveying direction of the cooling roller conveyor (2). Both ends of each spray pipe (41) are fixedly installed on both sides of the support device (1). The bottom of each spray pipe (41) is provided with multiple rows of small spray holes spaced evenly, with adjacent rows of spray holes staggered. The support device (1) is symmetrically provided with telescopic adjustment mechanisms (6) that slide and engage with both ends of each spray pipe (41). A distribution branch pipe (44) is installed in the middle of the top of the spray pipe (41). The end of the distribution branch pipe (44) is connected to the main distribution pipe (43). A water pump is installed on the distribution branch pipe (44). A flow stabilizer (7) is installed between the main distribution pipe (43) and the inlet pipe (42). A filter assembly (8) is installed on the inlet pipe (42). The structure of the lower spray assembly (5) is the same as that of the upper spray assembly (4). A wastewater collection tank (9) is installed at the bottom of the support device (1) below the lower spray assembly (5). A perforated plate (10) is installed at the bottom of the wastewater collection tank (9).

2. A laminar cooling system for a hot strip production line according to claim 1 : characterized in that: The telescopic adjustment mechanism (6) includes a drive cylinder (61), a movable rod (62), and a sealing plate (63). The sealing plate (63) is slidably installed at one end inside the spray pipe (41). One end of the movable rod (62) is fixedly set with the sealing plate (63), and the other end of the movable rod (62) extends to the outside of the spray pipe (41) and is slidably set with the end of the spray pipe (41). The fixed end of the drive cylinder (61) is installed on the outside of the support device (1). A connecting plate (64) is installed on the movable end of the drive cylinder (61). A connecting rod (65) is installed on the lower part of the connecting plate (64). The connecting rod (65) is connected to the other end of the movable rod (62) through an elastic connector.

3. A laminar cooling system for a hot strip production line according to claim 2: characterized in that: The elastic connector includes a fixed tube (66) and a sliding plate (67). A first sealing plate (68) and a second sealing plate (69) are respectively installed at both ends of the fixed tube (66). The sliding plate (67) is slidably installed inside the fixed tube (66). A sliding hole is machined on the first sealing plate (68). The other end of the movable rod (62) passes through the sliding hole and is fixedly connected to the sliding plate (67). Multiple telescopic springs (610) are evenly distributed between the sliding plate (67) and the second sealing plate (69) inside the fixed tube (66). One end of the connecting rod (65) is fixedly connected to the second sealing plate (69).

4. A laminar cooling system for a hot strip mill line as claimed in claim 1 : characterized in that: The spray pipe (41) on the lower spray assembly (5) is located below the two cooling rollers of the cooling roller conveyor (2).

5. A laminar cooling system for a hot strip mill line as claimed in claim 1 : characterized in that: The flow stabilizing buffer (7) includes a tank (71) and a flow stabilizing baffle (72). The flow stabilizing baffle (72) is movably installed at the bottom of the tank (71). There is a gap between the upper part of the flow stabilizing baffle (72) and the bottom of the tank (71). The flow stabilizing baffle (72) divides the inner cavity of the tank (71) into a water inlet cavity and a flow stabilizing cavity. The water inlet pipe (42) is located at the upper part of the water inlet cavity. A drain pipe (73) is provided at the bottom of the water inlet cavity. A drain valve is provided on the drain pipe (73). A flow stabilizing pipe (74) connected to the distribution main pipe (43) is provided at the bottom of the flow stabilizing cavity. A water outlet valve and a water outlet pump are provided on the flow stabilizing pipe (74).

6. A laminar cooling system for a hot strip production line according to claim 5: characterized in that: A sealing ring (75) is provided between the flow stabilizing baffle (72) and the tank body (71). A connecting column (76) is fixedly installed through the middle of the flow stabilizing baffle (72). Slots (77) are symmetrically machined on the side wall of the tank body (71). The two ends of the connecting column (76) are respectively inserted into the corresponding slots (77). One end of the connecting column (76) is machined with a cross groove. A limiting hole (78) corresponding to the cross groove is machined on the side wall of the tank body (71). A limiting rod (79) is installed in the limiting hole (78). One end of the limiting rod (79) is installed with a snap-fit ​​section corresponding to the cross groove. The snap-fit ​​section is inserted into the cross groove. The other end of the limiting rod (79) is installed with a limiting block (710). A limiting spring (711) is installed on the limiting rod (79) between the limiting block (710) and the outer wall of the tank body (71).

7. A laminar cooling system for a hot strip production line according to claim 5: characterized in that: The height of the flow stabilizing baffle (72) inside the tank (71) is higher than the radius of the tank (71).

8. A laminar cooling system for a hot strip mill line as claimed in claim 1 : characterized in that: The filter assembly (8) includes a filter tube (81), a baffle plate (82), and a baffle protrusion (83). The filter tube (81) is installed at an angle at the bottom of the inlet pipe (42). The end of the filter tube (81) is sealed by a flange cover assembly. The baffle protrusion (83) is installed at the top of the inlet pipe (42) near the filter tube (81). The baffle plate (82) is installed on one side of the baffle protrusion (83) by an elastic rod (84). The upper part of the baffle plate (82) is hinged to the bottom of the inlet pipe (42). A water inlet channel is left between the lower part of the baffle plate (82) and the filter tube (81).

9. A laminar cooling system for a hot strip production line according to claim 8: characterized in that: The deflector bump (83) has a structure with low edges and high middle.

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