Oblique close-packed circular hole jet quenching nozzle

Abstract

This utility model belongs to the field of heat treatment technology for strip steel, and discloses an inclined, densely packed circular hole jet quenching nozzle. It comprises four parts: a water inlet mechanism, a flow equalizer, an adjustment and fixing device, and a spray panel. The water inlet mechanism and flow equalizer employ multi-path diversion, multiple damping, multiple cooling chambers, and a reinforced structural design to achieve uniform water spray, flow zoning, and prevention of flexural deformation. The adjustment and fixing device allows for online adjustment of key mechanical parameters such as nozzle height, horizontal position, and parallelism via bolts, reducing adjustment time by more than three times. The spray panel adopts a dense array inclined jet design, effectively improving heat exchange capacity and spray uniformity. This utility model's jet nozzle features strong cooling capacity, uniform and controllable heat exchange, high structural strength, quick adjustment and cleaning, and long service life, enabling high uniformity, high straightness, and high-efficiency quenching heat treatment of strip steel.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment technology for plate and strip steel, and in particular to an inclined, densely packed circular hole jet quenching nozzle. Background Technology

[0002] Heat treatment is a key process for improving the overall performance of sheet and strip steel, especially in enhancing its strength, toughness, corrosion resistance, wear resistance, high-temperature performance, fatigue performance, and machinability. Many types of sheet and strip steel require heat treatment (such as carbon steel, stainless steel, and high-temperature alloys), with a wide range of specifications (thickness 2–350 mm, width 800–5500 mm), and the heat treatment processes are complex (such as normalizing, tempering, solution treatment, quenching, controlled cooling, and weak water cooling). Cooling is a crucial heat treatment process for sheet and strip steel. By designing and controlling different cooling rates and paths, the microstructure of the sheet and strip steel can be significantly improved, resulting in superior performance.

[0003] In the cooling process, cooling rate and cooling uniformity are crucial technical parameters that directly affect the metallurgical processes of heat treatment in strip steel, such as phase transformation, solution treatment, and precipitation, ultimately determining its final properties and shape. During the cooling of strip steel in heat treatment, the high-temperature strip surface comes into contact with the cooling medium. Based on different types of cooling nozzles, various heat exchange methods are formed, including single-phase forced jet heat exchange, in-pool boiling heat exchange, and gas-liquid mixing heat exchange. Among these, single-phase forced jet heat exchange, with its high efficiency, good uniformity, wide range of cooling rate adjustment, and strong controllability, has gradually become the preferred heat exchange method for heat treatment.

[0004] Circular orifice jet nozzles are one of the main nozzle types for single-phase forced jet heat exchange on flat, high-temperature objects. These nozzles typically have multiple circular water outlets. Cooling medium at a certain pressure and flow rate enters the nozzle housing through multiple inlets, and after being evenly distributed, it is jetted through the circular outlets onto the upper and lower walls of the flat, high-temperature object, achieving rapid heat exchange. Circular orifice jet nozzles have the following advantages: ① High jet velocity and strong impact force; the boundary layer on the wall of the cooled high-temperature object is thin and the flow is fast, resulting in high heat exchange efficiency; ② The surface of the cooled high-temperature object consists of multiple circular single-phase forced jet zones, providing strong controllability and uniform distribution of the jet flow state, which is beneficial for highly uniform and orderly heat exchange control on the high-temperature object wall; ③ By designing different outlet diameters and arrangements, the water flow density within the region can be effectively controlled, achieving a wide range of cooling rates.

[0005] Although round-hole jet nozzles have advantages in high cooling rate and high cooling uniformity, their application in the heat treatment and quenching of high-temperature strip steel presents the following problems: ① Round-hole nozzles are easily deformed by prolonged exposure to high-temperature strip steel. After deformation, the water column disperses, and the spray pattern changes significantly and irreversibly, affecting the process stability of the nozzle. ② After the high-velocity jet impacts the strip steel wall, splashing is obvious, interfering with the orderly distribution of the original jet and worsening the cooling uniformity. ③ To adapt to the quenching and cooling of wide plates, the nozzle width has been gradually widened to the 5m level. The uniformity of the nozzle's flow rate in the width direction is greatly affected by the internal structure, and ultra-wide nozzles are prone to bending, twisting, and other deformation problems. On the one hand, this affects the stability of the quenching process and reduces the uniformity of cooling in the width direction; on the other hand, it shortens the nozzle's service life and affects production.

[0006] Therefore, high-performance, long-life round-hole jet nozzles suitable for plate and strip steel roller quenching machines urgently need to be independently developed.

[0007] Among existing patents, Chinese patent application (publication number CN202725648U) discloses a water-cooled nozzle for water cooling of rolled parts. This device uses two sets of circular nozzles arranged in a ring, with each set connected to a separate water spray chamber. The two sets of nozzles have different spray angles. The structure of this device differs significantly from that of the present invention and is not suitable for quenching sheet and strip steel.

[0008] Chinese patent application (publication number CN105567921B) discloses a three-stage aluminum profile quenching and cooling device and cooling method. The circular jet nozzle used is a simple single-spray pipe form, which cools the outer surface of the aluminum profile from different angles. It is quite different from the symmetrical quenching and cooling of the upper and lower surfaces of the plate of this utility model in terms of quenching form, and is not related to this utility model.

[0009] Chinese patent application (publication number CN210104019U) discloses an intermittent water-cooled nozzle for quenching and cooling long shafts, which forms a cross force through pulsed water flow to cut the vapor film on the surface of the long shaft. The application field of this invention is quite different from that of this invention.

[0010] Chinese patent application (publication number CN113369317A) discloses a high-efficiency water-cooled nozzle for temperature control of rolled steel parts. The device uses conventional round holes to spray water to both sides, and the nozzle uses round hole damping inside to make the flow more uniform. This nozzle is used for unrestrained laminar flow cooling in the rolling process of steel parts, which is quite different from the jet impact quenching of strip steel of this utility model. Utility Model Content

[0011] To address the problems of traditional round-hole jet nozzles, such as poor flow uniformity, weak cooling capacity, easy deformation, and poor precision, which make them unsuitable for the quenching and cooling requirements of sheet and strip steel, the purpose of this utility model is to provide an inclined, densely packed round-hole jet quenching nozzle. This nozzle adopts an inclined round-hole jet method, with multiple rows of nozzles densely arranged to form an array jet. It features uniform flow distribution, strong cooling capacity, adjustable mechanical parameters, and long service life, thus meeting the needs of high-strength, uniform, and controllable quenching processes for sheet and strip steel.

[0012] The technical solution of this utility model is as follows: an inclined densely packed round hole jet quenching nozzle is installed in the gap of the roller table 6 of the quenching machine and symmetrically arranged along the upper and lower walls of the strip steel 7; the inclined densely packed round hole jet quenching nozzle 1 includes four parts: water inlet mechanism 2, flow equalization water distributor 3, adjustment and fixing device 4, and water spray panel 5.

[0013] One end of the water inlet mechanism 2 is connected to the bottom surface of the flow equalizer 3; the top surface of the flow equalizer 3 is connected to the spray panel 5; multiple layers of flow equalization damping orifice plates 11 are arranged inside the flow equalizer 3, which are arranged in parallel to each other to achieve water distribution and flow equalization.

[0014] The adjustment and fixing device 4 is connected to the side of the end of the flow equalizer 3 and is used to adjust the height of the inclined closely spaced round hole jet quenching nozzle 1.

[0015] The inclined, closely spaced circular hole jet quenching nozzle 1 has a width of 900mm to 5500mm and an instantaneous water flow rate of 150m³. 3 / h~800m 3 / h, with a water spray pressure of 0.5MPa~1.0MPa.

[0016] The water inlet mechanism 2 mainly consists of 2 to 6 water inlet branch pipes 8 and reinforcing ribs 9 between the branch pipes; one end of the water inlet branch pipe 8 is connected to the flow equalization distributor 3, and the other end is connected to the water supply pipeline 10; the distance between each adjacent water inlet branch pipe 8 is 500mm to 1000mm, and the diameter of the water inlet branch pipe 8 ranges from DN50 to DN125; each water inlet branch pipe 8 is connected by a rectangular reinforcing rib 9 to prevent the inclined densely packed round hole jet quenching nozzle 1 from bending and torsional deformation in the width direction.

[0017] The flow equalizer 3 is a cuboid flow equalizer box, with the bottom surface connected to the water inlet branch pipe 8 and the top surface connected to the water spray panel 5.

[0018] When the width of the inclined closely spaced round hole jet quenching nozzle 1 is ≥3800mm, the flow equalizer 3 is designed with two longitudinal baffles 12 to divide the flow equalizer 3 into three independent water supply chambers. The two side water supply chambers 13 are connected to one water inlet branch pipe 8, and the middle water supply chamber 14 is connected to two to four water inlet branch pipes 8. Whether the two side water supply chambers 13 are used depends on the width of the strip steel 7. When the width of the inclined closely spaced round hole jet quenching nozzle 1 is <3800mm, the flow equalizer 3 is not designed with longitudinal baffles 12, and the flow equalizer 3 has only one water supply chamber. In this case, the water inlet branch pipes 8 are configured with equal spacing and equal pipe diameter.

[0019] The outer side of the flow distribution device 3 is connected to the fin structure 15, which on the one hand strengthens the structure and prevents the box from deforming, and on the other hand increases the heat dissipation area to prevent the temperature of the inclined densely packed round hole jet quenching nozzle 1 from being too high when the high temperature strip steel 7 is being roasted.

[0020] When the width of the inclined closely spaced circular hole jet quenching nozzle 1 is ≥3800mm, and the width of the strip steel 7 is ≤3500mm, only the middle water supply chamber 14 is put into use. When the width of the strip steel 7 is >3500mm, the middle water supply chamber 14 and the two side water supply chambers 13 are put into use at the same time. Under this working condition, the spacing of the water inlet branch pipes 8 and the diameter of the water inlet branch pipes 8 are determined according to the width of the middle water supply chamber 14 and the two side water supply chambers 13.

[0021] The adjustment and fixing device 4 mainly consists of a nozzle fixing seat 16, an adjusting block 17, a longitudinal adjusting bolt 18, a horizontal adjusting bolt 19, a connecting plate 20, and a lifting lug 21. The adjusting block 17 is connected to the nozzle fixing seat 16, one end of the connecting plate 20 is connected to the adjusting block 17, and the other end is welded to the side plate of the flow equalizer 3. The lifting lug 21 is welded to the connecting plate 20.

[0022] One end of the longitudinal adjusting bolt 18 is fixed to the nozzle fixing seat 16, and the other end is fixed to the adjusting block 17. The distance between the nozzle fixing seat 16 and the adjusting block 17 is adjusted by adjusting the longitudinal adjusting bolt 18, which is used to adjust the longitudinal distance of the inclined closely spaced round hole jet quenching nozzle fixed on the adjusting block 17. The adjustment range is ±15mm. One end of the horizontal adjusting bolt 19 is fixed to the adjusting block 17, and the other end contacts the lower side wall of the connecting plate 20. The lateral position of the inclined closely spaced round hole jet quenching nozzle in the adjusting block 17 is adjusted by adjusting the horizontal adjusting bolt 19. The adjustment range is ±15mm.

[0023] The water spray panel 5 is welded to the outlet end of the flow equalizer 3; the thickness of the water spray panel 5 is 15mm to 30mm, and it is arranged at an angle along the forward direction of the strip steel 7. The angle between the jet water column and the wall of the strip steel 7 is 40 to 70°. There are 3 to 4 rows of round holes 22 arranged on the water spray panel 5. The small round hole nozzles 23 are fixed in the round holes 22 of the water spray panel 5 by threaded connection. The water spray diameter of the small round hole nozzles 23 is 3 to 5mm. The water spray panel 5 is provided with drain holes 24 at both ends to remove impurities inside the inclined densely arranged round hole jet quenching nozzles 1.

[0024] When the width of the inclined closely spaced circular hole jet quenching nozzle 1 is ≥3800mm, for strip steel 7 with a width ≤3500mm, only the small circular hole nozzles 23 on the spray panel 5 corresponding to the middle water supply chamber 14 of the flow equalizer 3 spray water. For strip steel 7 with a width >3500mm, the small circular hole nozzles 23 on the spray panel 5 corresponding to the middle water supply chamber 14 and the two side water supply chambers 13 of the flow equalizer 3 spray water, so as to realize the wide-direction flow zone control of the inclined closely spaced circular hole jet quenching nozzle 1, saving water and energy. When the width of the jet nozzle 1 is <3800mm, the small circular hole nozzles 23 on the spray panel 5 corresponding to the water supply chamber of the flow equalizer 3 spray water.

[0025] The advantages and beneficial effects of this utility model are:

[0026] 1. The water inlet mechanism adopts a multi-inlet branch pipe design, and the water supply is divided into the flow equalizer. The flow is then equalized twice through the multiple flow equalization damping orifice plates in the flow equalizer, which effectively improves the uniformity of the flow in the wide direction of the jet nozzle.

[0027] 2. The outer side of the jet nozzle flow distributor box is designed with a fin structure, and the water inlet branch pipe of the water inlet mechanism is designed with a reinforcing rib plate, which can effectively prevent the jet nozzle from bending and torsional deformation in the width direction, and improve the nozzle spraying accuracy and service life.

[0028] 3. When the nozzle width is ≥3800mm, for quenching and cooling of narrower strip steel, only the middle water supply chamber is used, and the water supply chambers on both sides are not sprayed, which effectively reduces the amount of water sprayed and achieves water and energy saving.

[0029] 4. The jet nozzle adjustment and fixing device can finely adjust the height, levelness and parallelism of the jet nozzle through different adjustment functions. The main mechanical parameters can be accurately adjusted by simply turning the bolts. It is convenient, reliable and has high adjustment accuracy. The adjustment time is shortened from 5-6 hours to 30 minutes.

[0030] 5. The spray panel features a multi-row, densely arrayed array of round holes with embedded detachable small nozzles. Regular replacement ensures the continuous and effective maintenance of the spray nozzle shape and size, resolving issues such as nozzle clogging and scaling. When cleaning impurities inside the jet nozzles, all small nozzles can be removed and the spray panel drain hole opened for convenient and effective cleaning, continuously maintaining the nozzle's spray capacity and flow uniformity.

[0031] 6. The water spray panel adopts an inclined design along the forward direction of the strip steel. On the one hand, it can expand the single-phase forced jet zone and improve the local heat exchange capacity. On the other hand, it can effectively remove residual water after cooling and improve the overall heat exchange capacity and uniformity.

[0032] The above design can significantly improve the flow uniformity and heat exchange capacity of the jet nozzle, greatly shorten the adjustment time, maintain high precision of the main mechanical parameters, facilitate inspection and maintenance, significantly improve the service life of the nozzle, and achieve water and energy saving. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the shape of an inclined, closely spaced circular hole jet quenching nozzle according to this utility model.

[0034] Figure 2 This is a diagram showing the internal structure of a tilted, densely packed circular hole jet quenching nozzle in the width direction, as described in this utility model.

[0035] Figure 3 This is a side view of the internal structure of an inclined, closely spaced circular hole jet quenching nozzle according to the present invention; (a) is a schematic diagram, and (b) is a cross-sectional schematic diagram.

[0036] In the diagram, 1- Inclined, densely packed circular jet quenching nozzle; 2- Water inlet mechanism; 3- Flow equalization distributor; 4- Adjustment and fixing device; 5- Spraying panel; 6- Quenching machine roller conveyor; 7- Steel strip; 8- Water inlet branch pipe; 9- Reinforcing rib plate; 10- Water supply pipeline; 11- Flow equalization damping orifice plate; 12- Water baffle plate; 13- Water supply chambers on both sides; 14- Water supply chamber in the middle; 15- Fin structure; 16- Nozzle fixing seat; 17- Adjusting block; 18- Longitudinal adjusting bolt; 19- Horizontal adjusting bolt; 20- Connecting plate; 21- Lifting lug; 22- Circular hole; 23- Small circular nozzle; 24- Drainage hole. Detailed Implementation

[0037] The following description, in conjunction with the accompanying drawings, describes a tilted, densely packed circular hole jet quenching nozzle for water cooling, cleaning and slag removal, height adjustment, horizontal position adjustment, and parallelism adjustment.

[0038] Example 1

[0039] In this embodiment, a width of 5000mm and an instantaneous maximum water flow rate of 800m³ / h are used. 3 Taking an inclined, closely spaced circular jet nozzle with a spray pressure of 1.0 MPa and a spray rate of 1 h as an example, the specific implementation scheme of this utility model is illustrated:

[0040] like Figures 1-3 As shown, when the high-temperature strip steel 7 is transported from the quenching machine roller conveyor 6 to the cooling area of ​​the inclined, densely packed circular jet quenching nozzle 1, the maximum water spray flow rate is 800 m³ / s. 3 / h, maximum spray pressure 1.0MPa Cooling water enters the water inlet mechanism 2 water inlet branch pipe 8 through the metal hose of the lower water inlet pipe of the inclined closely arranged round hole jet quenching nozzle 1, passes through the flow equalization damping orifice plate 11 in the middle water supply chamber 14 and the two side water supply chambers 13 of the flow equalization water distributor 3, and is jetted out by the round hole small nozzle 23 of the upper water spray panel 5 of the flow equalization water distributor 3 to cool the lower surface of the high temperature plate strip steel 7. At this time, the middle water supply chamber 14 and the two side water supply chambers 13 are separated by the water baffle plate 12 and are not connected to each other, so as to realize independent water spraying.

[0041] When the inclined, closely spaced circular hole jet quenching nozzle 1 is not spraying water to cool the strip steel 7, the height, horizontal position, and parallelism of the inclined, closely spaced circular hole jet quenching nozzle 1 can be adjusted. It can also be used for cleaning and removing slag from the flow distributor 3 and the spray panel 5. Cleaning of the flow distributor 3 and the spray panel 5 is achieved through the drain hole 24 and the small circular hole nozzle 23. The drain hole 24 plug and the small circular hole nozzle 23 on the spray panel 5 are removed sequentially, and the jet nozzle 1 is turned on to spray water at a flow rate of 200 m³ / h. 3 / h, spray pressure 0.3~0.5MPa, cooling water is sprayed out from the drain hole 24 on the spray panel 5 and the round hole 22 after the small round hole nozzle 23 is removed, to achieve the function of cleaning and slag removal. After cleaning, the drain hole 24 plug and the small round hole nozzle 23 on the spray panel 5 are installed in sequence.

[0042] The height, horizontal position, and parallelism of the inclined closely spaced circular hole jet quenching nozzle 1 are adjusted by the adjustment and fixing device 4: By turning the longitudinal adjustment bolts 18 on both sides of the inclined closely spaced circular hole jet quenching nozzle 1, the gap between the adjustment block 17 and the nozzle fixing seat 16 is adjusted, thereby adjusting the height of the inclined closely spaced circular hole jet quenching nozzle 1 within a range of ±15mm; by turning the horizontal adjustment bolts 19 on both sides of the inclined closely spaced circular hole jet quenching nozzle 1, the horizontal position of the adjustment block 17 is adjusted, thereby adjusting the horizontal position of the inclined closely spaced circular hole jet quenching nozzle 1 within a range of ±15mm; by turning the horizontal adjustment bolts 19 on both sides of the inclined closely spaced circular hole jet quenching nozzle 1, the nozzle 1 can move back and forth on one side, thereby adjusting the parallelism between the inclined closely spaced circular hole jet quenching nozzle 1 and the quenching machine roller conveyor 6, with a parallelism deviation of ≤±0.1mm on both sides of the inclined closely spaced circular hole jet quenching nozzle 1.

[0043] When the inclined, closely spaced circular hole jet quenching nozzle 1 passes over the normalized strip steel 7 for an extended period of time without contact with the steel, to prevent the nozzle 1 from deforming due to the high temperature of the strip steel 7, the following design or measures are taken: A flow rate of 50-100 m³ / h of water is introduced into the inclined, closely spaced circular hole jet quenching nozzle 1. 3 / h, spray water pressure 0.3~0.5MPa cooling water; rectangular reinforcing ribs 9 are designed between the water inlet branch pipes 8 to prevent the inclined densely packed round hole jet quenching nozzles 1 from bending and deforming in the width direction; the outer side of the flow equalizer 3 is designed with fin structure 15, which on the one hand strengthens the box structure and prevents the box from deforming, and on the other hand increases the heat dissipation area to prevent the temperature of the inclined densely packed round hole jet quenching nozzles 1 from being too high when the high temperature strip steel 7 is heated.

[0044] The results show that this invention effectively solves the problems of insufficient cooling capacity, poor heat transfer controllability, poor water spray uniformity, easy nozzle deformation, difficulty in cleaning blockages, and difficulty in adjusting key mechanical parameters of traditional round-hole jet nozzles. It realizes the application of inclined, closely spaced round-hole jet quenching nozzles in the field of quenching and cooling of strip steel, significantly improving the quenching and cooling efficiency and uniformity of strip steel. Furthermore, this invention significantly extends the service life of the jet nozzle and facilitates inspection and maintenance.

Claims

1. A jet quenching nozzle with inclined closely spaced circular holes, characterized in that, The inclined closely spaced round hole jet quenching nozzle (1) is installed in the gap of the quenching machine roller table (6) and is symmetrically arranged along the upper and lower walls of the strip steel (7); the inclined closely spaced round hole jet quenching nozzle (1) includes four parts: water inlet mechanism (2), flow equalizer (3), adjustment and fixing device (4), and spray panel (5). One end of the water inlet mechanism (2) is connected to the bottom surface of the flow equalizer (3); the top surface of the flow equalizer (3) is connected to the spray panel (5); multiple layers of flow equalizer damping orifice plates (11) are arranged inside the flow equalizer (3), which are arranged in parallel to each other to achieve water equalization. The adjustment and fixing device (4) is connected to the side of the end of the flow equalizer (3) for adjusting the height of the inclined closely spaced round hole jet quenching nozzle (1).

2. The inclined closely spaced circular hole jet quenching nozzle according to claim 1, characterized in that, The inclined, closely spaced circular hole jet quenching nozzle (1) has a width of 900mm to 5500mm and an instantaneous water flow rate of 150m³. 3 / h~800m 3 / h, with a water spray pressure of 0.5MPa~1.0MPa.

3. The inclined closely spaced circular hole jet quenching nozzle according to claim 1, characterized in that, The water inlet mechanism (2) mainly consists of 2 to 6 water inlet branch pipes (8) and reinforcing ribs (9) between the branch pipes; one end of the water inlet branch pipe (8) is connected to the flow equalization distributor (3), and the other end is connected to the water supply pipeline (10); the distance between each adjacent water inlet branch pipe (8) is 500mm to 1000mm, and the pipe diameter of the water inlet branch pipe (8) ranges from DN50 to DN125; each water inlet branch pipe (8) is connected by a rectangular reinforcing rib (9) to prevent the flexural deformation and torsional deformation of the inclined densely packed round hole jet quenching nozzle (1).

4. The inclined closely spaced circular hole jet quenching nozzle according to claim 1, characterized in that, The flow equalizer (3) is a cuboid flow equalizer box with an inlet branch pipe (8) connected to the bottom and a spray panel (5) connected to the top. When the width of the inclined closely spaced round hole jet quenching nozzle (1) is ≥3800mm, the flow equalizer (3) is designed with two longitudinal baffles (12) to divide the flow equalizer (3) into three independent water supply chambers. The two side water supply chambers (13) are connected to one water inlet branch pipe (8) respectively, and the middle water supply chamber (14) is connected to two to four water inlet branch pipes (8) respectively. Whether the two side water supply chambers (13) are used depends on the width of the strip steel (7). When the width of the inclined closely spaced round hole jet quenching nozzle (1) is <3800mm, the flow equalizer (3) is not designed with longitudinal baffles (12), and the flow equalizer (3) has only one water supply chamber. Under this condition, the water inlet branch pipes (8) are configured with equal spacing and equal pipe diameter. The outer side of the equal flow distributor (3) is connected to the fin structure (15), which on the one hand strengthens the structure and prevents the box from deforming, and on the other hand increases the heat dissipation area to prevent the temperature of the inclined densely packed round hole jet quenching nozzle (1) from being too high when the high temperature strip steel (7) is being roasted.

5. The inclined closely spaced circular hole jet quenching nozzle according to claim 4, characterized in that, When the width of the inclined closely spaced round hole jet quenching nozzle (1) is ≥3800mm, and the width of the strip steel (7) is ≤3500mm, only the middle water supply chamber (14) is put into use. When the width of the strip steel (7) is >3500mm, the middle water supply chamber (14) and the two side water supply chambers (13) are put into use at the same time. Under this working condition, the spacing of the water inlet branch pipe (8) and the diameter of the water inlet branch pipe (8) are determined according to the width of the middle water supply chamber (14) and the two side water supply chambers (13).

6. The inclined closely spaced circular hole jet quenching nozzle according to claim 1, characterized in that, The adjustment and fixing device (4) mainly consists of a nozzle fixing seat (16), an adjusting block (17), a longitudinal adjusting bolt (18), a horizontal adjusting bolt (19), a connecting plate (20), and a lifting lug (21); the adjusting block (17) is connected to the nozzle fixing seat (16), one end of the connecting plate (20) is connected to the adjusting block (17), and the other end is welded to the side plate of the flow equalizer (3); the lifting lug (21) is welded to the connecting plate (20); One end of the longitudinal adjusting bolt (18) is fixed to the nozzle fixing seat (16), and the other end is fixed to the adjusting block (17). The distance between the nozzle fixing seat (16) and the adjusting block (17) is adjusted by adjusting the longitudinal adjusting bolt (18), which is used to adjust the longitudinal distance of the inclined closely packed round hole jet quenching nozzle fixed on the adjusting block (17). The adjustment range is ±15mm. One end of the horizontal adjusting bolt (19) is fixed to the adjusting block (17), and the other end contacts the lower side wall of the connecting plate (20). The lateral position of the inclined closely packed round hole jet quenching nozzle in the adjusting block (17) is adjusted by adjusting the horizontal adjusting bolt (19). The adjustment range is ±15mm.

7. The inclined closely spaced circular hole jet quenching nozzle according to claim 1, characterized in that, The water spray panel (5) is welded to the outlet end of the flow equalizer (3); the thickness of the water spray panel (5) is 15mm to 30mm, and it is arranged at an angle along the forward direction of the strip steel (7). The angle between the jet water column and the wall of the strip steel (7) is 40° to 70°. There are 3 to 4 rows of round holes (22) on the water spray panel (5). The small round hole nozzles (23) are fixed in the round holes (22) of the water spray panel (5) by threaded connection. The water spray diameter of the small round hole nozzles (23) is 3 to 5mm. The water spray panel (5) is provided with drain holes (24) at both ends to remove impurities inside the inclined densely arranged round hole jet quenching nozzles (1). When the width of the inclined densely packed round hole jet quenching nozzle (1) is ≥3800mm, for strip steel (7) with a width ≤3500mm, only the small round hole nozzle (23) on the spray panel (5) corresponding to the middle water supply chamber (14) of the flow equalizer (3) sprays water. For strip steel (7) with a width >3500mm, the small round hole nozzle (23) on the spray panel (5) corresponding to the middle water supply chamber (14) of the flow equalizer (3) and the two side water supply chambers (13) spray water, so as to realize the wide-direction flow zoning control of the inclined densely packed round hole jet quenching nozzle (1), saving water and energy. When the width of the jet nozzle (1) is less than 3800mm, the small nozzle (23) with round hole on the water spray panel (5) corresponding to the water supply chamber of the water distributor (3) sprays water evenly.

Images