Online heat treatment cooling system and method for hot-rolled steel materials

Abstract

The present invention relates to the field of hot-rolled steel material heat treatment equipment and process technology, and discloses an online heat treatment cooling system and method for hot-rolled steel material, which is applied to production lines for hot-rolled seamless steel pipes and plates, etc. The system includes a spray cooling device and a control module, and the device includes a cantilever column, a cantilever beam, a nozzle header and a water supply unit; the cantilever column is arranged outside the production line and is hinged to the cantilever beam; the nozzle header is arranged on the cantilever beam and is parallel to the axis of the steel pipe to be cooled; the water supply unit provides cooling water to the nozzle header; the control module adjusts and controls the height of the cantilever column, and / or controls the rotation of the cantilever beam, and / or controls the water supply state of the water supply unit, and / or controls the position of the nozzle header to adjust the cooling intensity and cooling method of the nozzle header. The above system can evenly cool the steel pipe in a short time so that the steel pipe reaches the final cooling temperature when the temperature difference in the length direction of the steel pipe is extremely large after continuous rolling, and there will be no bending problem, thereby improving the quality of the finished product.

Description

Technical Field

[0001] The invention relates to the field of hot-rolled steel pipe heat treatment equipment and process technology, and in particular to an online heat treatment cooling system and method for hot-rolled steel materials. Background Art

[0002] In the production process of hot-rolled seamless steel pipes, a spray cooling device is usually added after continuous rolling but before entering the reheating furnace. By combining the cooling treatment after rolling with the subsequent reheating step, the microstructure of the hot-rolled seamless steel pipe is regulated and organized, thereby improving the comprehensive mechanical properties of the product.

[0003] In the prior art, the production space of the hot-rolled steel pipe unit production line is relatively compact, the distance from the spiral roller after continuous rolling to the reheating furnace is short, and considering that the circular rotation of the steel pipe on the spiral roller is intermittent and discontinuous, at the same time, the steel pipes produced on the production line have different specifications and sizes and the temperature difference in the length direction of the steel pipe after continuous rolling is extremely large, and the temperature difference at different positions can exceed 100°C. Therefore, a cooling system that can achieve uniform cooling of hot-rolled steel pipes in a limited installation space and in a very short time needs to be studied urgently. Summary of the invention

[0004] In view of this, the present application provides an online heat treatment cooling system and method for hot-rolled steel materials, the main purpose of which is to solve the technical problem that the cooling system in the prior art cannot achieve uniform cooling of the hot-rolled steel pipe in a limited installation space and in a very short time.

[0005] On one hand, the present invention provides an online heat treatment cooling system for hot-rolled steel materials, which is applied to a hot-rolled seamless steel pipe production line, wherein the hot-rolled seamless steel pipe production line comprises a spiral roller table arranged between a steel pipe sawing area and a reheating furnace conveyor line, and the system comprises a spray cooling device and a control module, wherein the spray cooling device comprises a cantilever column, a cantilever beam, a nozzle header and a water supply unit;

[0006] The cantilever column is arranged outside the hot-rolled seamless steel pipe production line, and the cantilever crossbeam is hinged to the cantilever column;

[0007] The nozzle header is fixed on the cantilever crossbeam and is arranged parallel to the axial direction of the steel pipe to be cooled on the spiral roller;

[0008] The water supply unit is connected to the nozzle header through the cantilever beam, and is used to provide cooling water to the nozzle header;

[0009] The control module is respectively connected to the cantilever column, the cantilever beam, the nozzle manifold and the water supply unit for control. The control module controls the cantilever column to adjust its height, and / or controls the cantilever beam to rotate around the cantilever column, and / or controls the water supply state of the water supply unit, and / or controls the position of the nozzle manifold to adjust the cooling intensity and cooling method of the nozzle manifold on the steel pipe to be cooled on the spiral roller.

[0010] Optionally, the cantilever column includes a fixed base, a lifting cylinder, a guide rod, a guide sleeve and a column, wherein a first displacement sensor is installed in the lifting cylinder;

[0011] The bottom of the lifting cylinder is fixedly connected to the top surface of the fixed base, and the cylinder rod of the lifting cylinder is spherically hinged at the center of the bottom surface of the column;

[0012] A plurality of guide sleeves are evenly arranged around the lifting cylinder and fixedly connected to the top surface of the fixed base. A guide rod is correspondingly arranged in each guide sleeve. The guide sleeve is sleeved on the outer wall of the guide rod. The guide rod moves along the length direction of the guide sleeve.

[0013] The bottom surface of the column is fixedly connected to the plurality of guide rods;

[0014] The control module is control-connected to the cantilever column, and is used to drive the lifting cylinder to drive the column to move in the vertical direction, and receive position information fed back by the first displacement sensor.

[0015] Optionally, the cantilever cross beam comprises a cantilever beam, a shaft sleeve, a swing arm oil cylinder, an oil cylinder bracket, an oil cylinder connecting rod, a roller group and a diagonal support bracket, wherein a second displacement sensor is installed in the swing arm oil cylinder;

[0016] A plurality of first water storage chambers are provided in the cantilever beam, and the water supply unit is connected to the nozzle manifold through the plurality of first water storage chambers;

[0017] The shaft sleeve is hinged to the shaft head at the top of the cantilever column through a bearing, the cantilever beam is fixedly connected to the shaft sleeve, the diagonal support bracket is fixedly supported between the cantilever beam and the cantilever column, and the roller group is arranged on a side of the diagonal support bracket close to the arc surface of the cantilever column;

[0018] The cylinder bracket is fixedly connected to the cantilever column, the swing arm cylinder is hinged on the cylinder bracket, the cylinder rod of the swing arm cylinder is hinged to the cylinder connecting rod, and the cylinder connecting rod is fixedly connected to the shaft sleeve;

[0019] The control module is control-connected to the cantilever beam, and is used to drive the arm cylinder to drive the cantilever beam to rotate around the cantilever column, and receive the rotation angle information fed back by the second displacement sensor.

[0020] Optionally, the nozzle manifold includes a ball-hinged water mist nozzle, a manifold body, a servo electric cylinder, a folding cylinder, a cylinder bracket, a cylinder connecting rod, a folding sleeve and a folding shaft;

[0021] The ball-hinged water mist nozzles are evenly fixed on the bottom surface and the outer side surface of the manifold body, the servo electric cylinder is hinged on the top surface and the inner side surface of the manifold body, and the cylinder rod of the servo electric cylinder is hinged to the ball-hinged water mist nozzles;

[0022] The folding sleeve is fixedly connected to one end of the cantilever beam away from the cantilever column, the first end of the folding shaft is hinged in the folding sleeve through a bearing, and the second end of the folding shaft is fixedly connected to the manifold body;

[0023] The cylinder bracket is fixed on the cantilever crossbeam, the folding cylinder is hinged on the cylinder bracket, the cylinder rod of the folding cylinder is hinged to the cylinder connecting rod, and the cylinder connecting rod is fixedly connected to the folding shaft;

[0024] A plurality of second water storage chambers are provided in the manifold body, the second water storage chambers are connected to the water supply unit through the cantilever beam, and the second water storage chambers are also connected to the ball-hinged water mist nozzle;

[0025] The control module is connected to the nozzle manifold and is used to drive the servo electric cylinder to control the swing of the ball-hinged water mist nozzle and adjust the swing angle, and / or drive the folding cylinder to drive the manifold body to rotate around the folding axis.

[0026] Optionally, the manifold body is in a bull horn shape, including a horizontal manifold and two inclined manifolds, the two inclined manifolds are respectively connected to two ends of the horizontal manifold, and the inclined manifolds are inclined away from the ground at a preset angle with the horizontal manifold, wherein the preset angle ranges from 30° to 60°;

[0027] The second end of the folding shaft is fixedly connected to the center of the horizontal header, and a plurality of the ball-hinged water mist nozzles are evenly arranged along the bottom surface and outer side surface of the horizontal header and the inclined header;

[0028] The ball-articulated water mist nozzle includes a connected spherical joint and a conical water mist nozzle body, the spherical joint is connected to the second water storage chamber, and the cylinder rod of the servo electric cylinder is hinged to the spherical joint to adjust the spray height and swing angle of the conical water mist nozzle body, wherein the nozzle caliber range of the conical water mist nozzle body is φ3.1mm-φ4.6mm, the spray angle range of the conical water mist nozzle body is 50°-120°, the spray flow rate range of the conical water mist nozzle body is 1.5m³ / h-6.2m³ / h, the swing angle range of the conical water mist nozzle body is -25°-25°, the height range of the conical water mist sprayed by the ball-articulated water mist nozzle to the surface of the steel pipe to be cooled is 2000mm-2400mm, and the spray overlap rate of two adjacent ball-articulated water mist nozzles is 12%-35%.

[0029] Optionally, the number of the nozzle manifolds is multiple, the number of the cantilever crossbeams is equal to the number of the nozzle manifolds, and each of the nozzle manifolds is hinged to the cantilever column through a cantilever crossbeam;

[0030] The effective cooling length of each nozzle header is in the range of 6000mm-7000mm, and is used to cool the steel pipe to be cooled with an outer diameter in the range of φ100mm-φ300mm after continuous rolling.

[0031] Optionally, the water supply unit includes a diversion collecting pipe, a bypass pipeline and a plurality of diversion water supply pipelines, and the diversion collecting pipe is respectively connected to the bypass pipeline and the plurality of diversion water supply pipelines;

[0032] The diversion and collection pipes are provided with a water pressure sensor and a water temperature sensor;

[0033] The bypass pipeline is provided with a manual butterfly valve and a regulating valve;

[0034] The branch water supply pipeline is provided with a regulating valve and a flow meter;

[0035] The plurality of branch water supply pipelines are connected to the nozzle header through the cantilever beam, and the bypass pipeline is used to adjust the water supply pressure and water supply volume of the plurality of branch water supply pipelines, wherein the water supply pressure is 0.2MPa to 1.0MPa.

[0036] Optionally, the control module includes a cooling model unit, a PLC control unit and a scanning laser thermometer, and the PLC control unit is connected to the cooling model unit and the scanning laser thermometer respectively;

[0037] The cooling model unit calculates preset cooling parameters based on the specifications of the steel pipe to be cooled and the preset cooling temperature, and sends the preset cooling parameters to the PLC control unit;

[0038] The PLC control unit is respectively connected to the cantilever column, the cantilever beam, the nozzle header and the water supply unit, and the PLC control unit adjusts the cooling process parameters of the cantilever column, the cantilever beam, the nozzle header and the water supply unit based on the preset cooling parameters to control the nozzle header to cool the steel pipe to be cooled on the spiral roller;

[0039] The scanning laser thermometer is arranged beside the spiral roller, and is used to obtain the full-length temperature of the steel pipe to be cooled and feed the full-length temperature back to the PLC control unit to adjust the cooling process parameters, and at the same time generate a temperature curve of the steel pipe to be cooled.

[0040] Another aspect of the present invention provides a method for heat treatment cooling of a hot-rolled seamless steel pipe, the method being applied to an online heat treatment cooling system for hot-rolled steel materials as described above, the method comprising:

[0041] The control module controls the cantilever crossbeam to drive the nozzle manifold to rotate around the cantilever column, so that the nozzle manifold rotates to above the spiral roller, and the nozzle manifold and the steel pipe to be cooled on the spiral roller are kept axially parallel;

[0042] The control module calculates preset cooling parameters based on the specifications of the steel pipe to be cooled and the preset cooling temperature, and adjusts the cooling process parameters of the online heat treatment cooling system of the hot-rolled steel material based on the preset cooling parameters to control the nozzle manifold to cool the steel pipe to be cooled on the spiral roller;

[0043] The control module obtains the full-length temperature of the steel pipe to be cooled and adjusts the cooling process parameters in real time based on the full-length temperature, and generates a temperature curve of the steel pipe to be cooled.

[0044] Optionally, the rotation angle range of the nozzle manifold and the cantilever beam in the horizontal plane is 0-90°. When the steel pipe to be cooled has completed cooling, the control module controls the nozzle manifold to rotate in the horizontal plane until it coincides with the cantilever beam on the same horizontal line. At the same time, the control module controls the cantilever beam to rotate to the outside of the hot-rolled seamless steel pipe production line to clear the space area in the vertical direction of the spiral roller.

[0045] The hot-rolled steel material online heat treatment cooling system and method provided by the present invention modularizes the spray cooling device, controls and connects the control module with each structural module, realizes the adjustment of at least one cooling process including the height of the cantilever column, the rotation angle of the cantilever beam, the position of the nozzle header and the water supply state of the water supply unit, so as to accurately adjust the cooling intensity and cooling mode of the nozzle header, thereby enabling the cooling water to be uniformly sprayed onto the surface of the steel pipe to be cooled, improves the cooling efficiency, accelerates the cooling speed, avoids the bending deformation of the steel pipe due to excessive local cooling, and reduces the temperature gradient in the cooling process, avoids the deformation of the steel pipe or the internal stress concentration due to uneven cooling, enables the steel pipe to reach the final cooling temperature within a limited time, ensures the uniformity and effectiveness of cooling, and effectively improves the quality of the finished steel pipe; the control module can dynamically adjust the cooling strategy according to the specific situation of the steel pipe, is suitable for the cooling requirements of steel pipes of different specifications and materials, realizes independent or overall control of multiple structural modules, enables the steel pipe to maintain a straight state during the cooling process, and has strong flexibility; the spray cooling device is arranged on the outside of the hot-rolled seamless steel pipe production line, and does not need to occupy too much installation space. In summary, the above system can evenly cool the steel pipe in a very short time when the temperature difference in the length direction of the steel pipe is extremely large after continuous rolling, so that the steel pipe reaches the final cooling temperature, ensuring that there will be no bending problems due to cooling control, thereby improving the quality of the finished steel pipe.

[0046] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0048] Figure 1 A schematic structural diagram showing an online heat treatment cooling system for hot-rolled steel materials provided by an embodiment of the present invention applied to a hot-rolled seamless steel pipe production line;

[0049] Figure 2 It shows a schematic structural diagram of a spray cooling device in an online heat treatment cooling system for hot-rolled steel materials provided by an embodiment of the present invention;

[0050] Figure 3 It shows a schematic structural diagram of a water supply unit of a spray cooling device in an online heat treatment cooling system for hot-rolled steel materials provided by an embodiment of the present invention;

[0051] Figure 4 A schematic flow chart of a heat treatment cooling method for a hot-rolled seamless steel pipe provided in an embodiment of the present invention is shown.

[0052] In the figure:

[0053] 1. Cantilever column; 101. Fixed base; 102. Lifting cylinder; 103. Guide rod; 104. Guide sleeve; 105. Column;

[0054] 2. Cantilever beam; 201. Cantilever beam; 202. Bushing; 203. Swing arm cylinder; 204. Cylinder bracket; 205. Cylinder connecting rod; 206. Roller group; 207. Diagonal support bracket;

[0055] 3. Nozzle manifold; 301. Ball-jointed water mist nozzle; 302. Manifold body; 303. Servo electric cylinder; 304. Folding cylinder; 305. Cylinder bracket; 306. Cylinder connecting rod; 307. Folding sleeve; 308. Folding shaft;

[0056] 4. Water supply unit; 401. Diversion collecting pipe; 402. Branch water supply pipeline; 403. Bypass pipeline; 404. Manual butterfly valve; 405. Regulating valve; 406. Flow meter; 407. Water pressure sensor; 408. Water temperature sensor. DETAILED DESCRIPTION

[0057] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0058] The present invention provides an online heat treatment cooling system for hot-rolled steel materials, which is applied to a hot-rolled seamless steel pipe production line. The hot-rolled seamless steel pipe production line includes a spiral roller set between a steel pipe sawing area and a reheating furnace conveyor line. The system includes a spray cooling device and a control module, wherein the spray cooling device includes a cantilever column 1, a cantilever beam 2, a nozzle header 3 and a water supply unit 4; the cantilever column 1 is set on the outside of the hot-rolled seamless steel pipe production line, and the cantilever beam 2 is hinged to the cantilever column 1; the nozzle header 3 is fixed on the cantilever beam 2 and is connected to the spiral roller. The steel pipe to be cooled is arranged axially parallel; the water supply unit 4 is connected to the nozzle manifold 3 through the cantilever beam 2, and is used to provide cooling water to the nozzle manifold 3; the control module is controlled and connected with the cantilever column 1, the cantilever beam 2, the nozzle manifold 3 and the water supply unit 4 respectively, and the control module controls the cantilever column 1 to adjust the height, and / or controls the cantilever beam 2 to rotate around the cantilever column 1, and / or controls the water supply state of the water supply unit 4, and / or controls the position of the nozzle manifold 3, so as to adjust the cooling intensity and cooling method of the nozzle manifold 3 on the steel pipe to be cooled on the spiral roller.

[0059] The online heat treatment cooling system for hot-rolled steel materials provided by the present invention divides the spray cooling device into modules, and the control module is controlled and connected with each structural module to realize the adjustment of at least one cooling process including the height of the cantilever column 1, the rotation angle of the cantilever beam 2, the position of the nozzle header 3 and the water supply state of the water supply unit 4, so as to accurately adjust the cooling intensity and cooling mode of the nozzle header 3, so that the cooling water can be evenly sprayed onto the surface of the steel pipe to be cooled, improve the cooling efficiency, speed up the cooling speed, avoid the bending deformation of the steel pipe due to excessive local cooling, and reduce the temperature gradient in the cooling process, avoid the deformation of the steel pipe or internal stress concentration caused by uneven cooling, make the steel pipe reach the final cooling temperature within a limited time, ensure the uniformity and effectiveness of cooling, and effectively improve the quality of the finished steel pipe; the control module can dynamically adjust the cooling strategy according to the specific situation of the steel pipe, is suitable for the cooling requirements of steel pipes of different specifications and materials, realizes independent or overall control of multiple structural modules, so that the steel pipe maintains a straight state during the cooling process, and has strong flexibility; the spray cooling device is arranged on the outside of the hot-rolled seamless steel pipe production line, and does not need to occupy too much installation space. In summary, the above system can evenly cool the steel pipe in a very short time when the temperature difference in the length direction of the steel pipe is extremely large after continuous rolling, so that the steel pipe reaches the final cooling temperature, ensuring that there will be no bending problems due to cooling control, thereby improving the quality of the finished steel pipe.

[0060] Among them, Figure 1As shown, it is a structural schematic diagram of the online heat treatment cooling system for hot-rolled steel materials provided by the present application applied to the hot-rolled seamless steel pipe production line. First, the steel pipe is continuously rolled in the continuous rolling mill to gradually reduce the diameter and wall thickness to reach the required size; then, the rolled steel pipe enters the sawing area and is precisely cut by the saw blade to divide it into segments of the required length; the multiple divided steel pipes are arranged one by one on the spiral roller, and the spray cooling device provided by the present application is arranged on the outside of the spiral roller, which is used to cool the steel pipes to be cooled on the spiral roller one by one. Finally, the cooled steel pipe enters the reheating furnace conveyor line and is conveyed into the reheating furnace to complete the entire process.

[0061] Specifically, in the above embodiment, the cantilever column 1 includes a fixed base 101, a lifting cylinder 102, a guide rod 103, a guide sleeve 104 and a column 105, wherein a first displacement sensor is installed in the lifting cylinder 102; the bottom of the lifting cylinder 102 is fixedly connected to the top surface of the fixed base 101, and the cylinder rod of the lifting cylinder 102 is spherically hinged at the bottom center of the column 105; a plurality of guide sleeves 104 are evenly arranged around the lifting cylinder 102 and fixedly connected to the top surface of the fixed base 101, and a guide rod 103 is correspondingly arranged in each guide sleeve 104, and the guide sleeve 104 is sleeved on the outer wall of the guide rod 103, and the guide rod 103 moves along the length direction of the guide sleeve 104; the bottom surface of the column 105 is fixedly connected to the plurality of guide rods 103; the control module is control-connected to the cantilever column 1, and is used to drive the lifting cylinder 102 to drive the column 105 to move in the vertical direction, and receive the position information fed back by the first displacement sensor.

[0062] Specifically, the overall structure of the cantilever column 1 is as follows: Figure 2 As shown, the fixed base 101 is arranged at the bottom, usually fixed on the ground or other fixed devices, the lifting cylinder 102 is fixed on the fixed base 101, and four guide sleeves 104 are arranged at the four corners of the lifting cylinder 102, one end of the guide sleeve 104 is connected to the fixed base 101, and the other end of the guide sleeve 104 is connected to a partition, and the partition is arranged parallel to the fixed base 101. A guide rod 103 is arranged in each guide sleeve 104, and the guide sleeve 104 is sleeved on the guide rod 103. On the outer wall, the guide rod 103 passes through the partition and is fixedly connected to the bottom of the column 105. The bottom of the column 105 is also arranged parallel to the partition and the fixed base 101 respectively. The cylinder rod of the lifting cylinder 102 passes through the spherical surface of the partition and is hinged at the center of the bottom surface of the column 105. The control module drives the cylinder rod of the lifting cylinder 102 to move in the vertical direction, thereby supporting the column 105 to move in the vertical direction, and simultaneously drives the guide rod 103 to move in the guide sleeve 104 in the vertical direction, thereby supporting the column 105.

[0063] In this embodiment, the cylinder rod of the lifting cylinder 102 is hinged with the central spherical surface of the bottom surface of the column 105, which can ensure that the column 105 remains stable during the lifting process and avoid position deviation due to deflection or vibration. At the same time, a multi-point guiding design is adopted, so that multiple guide rods 103 synchronously support the movement of the column 105, effectively preventing the column 105 from tilting or shaking during the lifting process, and ensuring that the vertical movement of the column 105 is more stable and reliable; multiple guide rods 103 and guide sleeves 104 also provide multi-point support for the column 105, enhancing the structural rigidity of the column 105, so that it can still remain stable when subjected to a large load; the control module and the lifting oil The cylinder 102 works in coordination with the first displacement sensor to monitor the displacement of the column 105 in real time, and at the same time feeds back to the control module, so as to flexibly adjust the height of the column 105 according to actual needs, and ensure that the column 105 always maintains precise position control during the lifting process, which helps to improve the overall accuracy and reliability of the movement of the column 105; the control module's adjustment of the height of the column 105 directly affects the relative position between the nozzle manifold 3 and the steel pipe, thereby affecting the spraying effect of the cooling water. By accurately controlling the height of the column 105, it can be ensured that the distance between the nozzle manifold 3 and the steel pipe is always maintained in an optimal state, thereby improving the cooling efficiency and cooling uniformity.

[0064] Specifically, in the above embodiment, the cantilever beam 2 includes a cantilever beam 201, a sleeve 202, a swing arm cylinder 203, a cylinder bracket 204, a cylinder connecting rod 205, a roller group 206 and a diagonal support bracket 207, wherein a second displacement sensor is installed in the swing arm cylinder 203; a plurality of first water storage chambers are arranged in the cantilever beam 201, and the water supply unit 4 is connected to the nozzle manifold 3 through the plurality of first water storage chambers; the sleeve 202 is hinged to the shaft head at the top of the cantilever column 1 through a bearing, the cantilever beam 201 is fixedly connected to the sleeve 202, and the diagonal support bracket 207 is fixedly supported. Between the cantilever beam 201 and the cantilever column 1, the roller group 206 is arranged on the side of the diagonal support bracket 207 close to the arc surface of the cantilever column 1; the cylinder bracket 204 is fixedly connected to the cantilever column 1, the boom cylinder 203 is hinged on the cylinder bracket 204, the cylinder rod of the boom cylinder 203 is hinged to the cylinder connecting rod 205, and the cylinder connecting rod 205 is fixedly connected to the shaft sleeve 202; the control module is control-connected to the cantilever cross beam 2, and is used to drive the boom cylinder 203 to drive the cantilever beam 201 to rotate around the cantilever column 1, and receive the rotation angle information fed back by the second displacement sensor.

[0065] Specifically, the first water storage chamber is formed by welding H-shaped steel and steel plate in the cantilever beam 201. Multiple first water storage chambers are respectively connected to the water supply unit 4 and the nozzle manifold 3, serving as the water supply pipeline of the nozzle manifold 3, ensuring that the cooling water can be evenly distributed to each nozzle, further improving the cooling effect. Normally, the number of first water storage chambers is two, and on this basis, more first water storage chambers can be set according to specific cooling requirements and structural arrangements.

[0066] In this embodiment, if Figure 2 As shown, the shaft sleeve 202 is hinged to the shaft head at the top of the cantilever column 1 through the bearing, thereby ensuring that the cantilever beam 201 rotates smoothly and without jamming, reducing friction and wear. At the same time, the roller group 206 is arranged on the side of the diagonal support bracket 207 close to the arc surface of the cantilever column 1, which can also reduce the friction of the cantilever beam 201 during the rotation process, ensuring smoother and more stable rotation; the diagonal support bracket 207 is fixedly supported between the cantilever beam 201 and the cantilever column 1, thereby enhancing the structural rigidity of the cantilever beam 201, so that it can still remain stable when subjected to a large load; the control module and the rotation The control connection of the arm cylinder 203, in conjunction with the second displacement sensor, can monitor the rotation angle of the cantilever beam 201 in real time, ensuring that the cantilever beam 201 always maintains precise angle control during the rotation process, which helps to improve the accuracy and reliability of the rotation of the arm cylinder 203; the angle adjustment of the cantilever beam 201 will also directly affect the relative position between the nozzle manifold 3 and the steel pipe, thereby affecting the injection effect of the cooling water. By accurately controlling the angle of the cantilever beam 201, it is ensured that the distance and angle between the nozzle manifold 3 and the steel pipe are always maintained in the optimal state, thereby improving the cooling efficiency and cooling uniformity.

[0067] Specifically, in the above embodiment, the nozzle manifold 3 includes a ball-articulated water mist nozzle 301, a manifold body 302, a servo electric cylinder 303, a folding cylinder 304, a cylinder bracket 305, a cylinder connecting rod 306, a folding sleeve 307 and a folding shaft 308; the ball-articulated water mist nozzle 301 is evenly fixed on the bottom surface and the outer side surface of the manifold body 302, the servo electric cylinder 303 is hinged on the top surface and the inner side surface of the manifold body 302, and the cylinder rod of the servo electric cylinder 303 is hinged to the ball-articulated water mist nozzle 301; the folding sleeve 307 is fixedly connected to the end of the cantilever crossbeam 2 away from the cantilever column 1, the first end of the folding shaft 308 is hinged in the folding sleeve 307 through a bearing, and the second end of the folding shaft 308 is hinged in the folding sleeve 307 through a bearing. The end is fixedly connected to the manifold body 302; the cylinder bracket 305 is fixed on the cantilever beam 2, the folding cylinder 304 is hinged on the cylinder bracket 305, the cylinder rod of the folding cylinder 304 is hinged to the cylinder connecting rod 306, and the cylinder connecting rod 306 is fixedly connected to the folding axis 308; a plurality of second water storage chambers are arranged in the manifold body 302, the second water storage chambers are connected to the water supply unit 4 through the cantilever beam 2, and the second water storage chambers are also connected to the ball-articulated water mist nozzle 301; the control module is connected to the nozzle manifold 3, and is used to drive the servo electric cylinder 303 to control the swing of the ball-articulated water mist nozzle 301 and adjust the swing angle, and / or drive the folding cylinder 304 to drive the manifold body 302 to rotate around the folding axis 308.

[0068] Specifically, a plurality of second water storage chambers are arranged in the manifold body 302, and the number of the second water storage chambers is equal to that of the first water storage chambers. The second water storage chambers are connected to the first water storage chambers in the cantilever beam 201 through metal hoses. The plurality of second water storage chambers can realize segmented cooling control, and the cooling method is more flexible.

[0069] In this embodiment, if Figure 2 As shown, the control module drives the servo electric cylinder 303, which can accurately control the swing angle of the ball-articulated water mist nozzle 301, ensuring that the cooling water can be accurately sprayed to the specified position of the steel pipe, thereby improving the accuracy and uniformity of cooling; the ball-articulated water mist nozzle 301 is evenly fixed on the bottom and outer side surfaces of the manifold body 302, thereby realizing all-round cooling of the steel pipe, while allowing the nozzle to swing freely in multiple directions, and can flexibly adjust the spray angle according to the different positions and shapes of the steel pipe, thereby ensuring that the cooling water evenly covers the surface of the steel pipe; the folding cylinder 304 is fixedly connected to the folding shaft 308 through the cylinder connecting rod 306, and the control module drives the folding cylinder 304 to drive the manifold body 302 to rotate around the folding shaft 308, so that the nozzle manifold 3 can flexibly adjust the angle according to the actual position of the steel pipe and the cooling demand, thereby further improving the flexibility and adaptability of cooling; the connection method between the folding sleeve 307 and the folding shaft 308 provides stable support while ensuring the flexible rotation of the manifold body 302, thereby ensuring the stability and reliability of the system.

[0070] Furthermore, the manifold body 302 is in the shape of an ox horn, and includes a horizontal manifold and two inclined manifolds, the two inclined manifolds are respectively connected to the two ends of the horizontal manifold, and the inclined manifolds and the horizontal manifold are inclined at a preset angle away from the ground, wherein the preset angle ranges from 30° to 60°;

[0071] The second end of the folding shaft 308 is fixedly connected to the center of the horizontal header, and a plurality of ball-hinged water mist nozzles 301 are evenly arranged along the bottom surface and outer side surface of the horizontal header and the inclined header;

[0072] The ball-articulated water mist nozzle 301 includes a connected spherical joint and a conical water mist nozzle body, the spherical joint is connected to the second water storage chamber, and the cylinder rod of the servo electric cylinder 303 is hinged to the spherical joint to adjust the spray height and swing angle of the conical water mist nozzle body, wherein the nozzle caliber range of the conical water mist nozzle body is φ3.1mm-φ4.6mm, the spray angle range of the conical water mist nozzle body is 50°-120°, the spray flow rate range of the conical water mist nozzle body is 1.5m³ / h-6.2m³ / h, the swing angle range of the conical water mist nozzle body is -25°-25°, the ball-articulated water mist nozzle 301 sprays the conical water mist to the height range of the surface of the steel pipe to be cooled is 2000mm-2400mm, and the spray overlap rate of two adjacent ball-articulated water mist nozzles 301 is 12%-35%.

[0073] Among them, the ball-articulated water mist nozzle 301 includes an adjustable spherical joint and a conical water mist nozzle body. The inner cavity structure of the conical water mist nozzle body can spray the water in the cavity into a conical steam mist at a certain pressure. The caliber range of the conical water mist nozzle body is φ3.1mm-φ4.6mm, the spray angle range is 50°-120°, the spray flow range is 1.5m³ / h-6.2m³ / h, and the swing angle of the conical water mist nozzle body is online adjustable, and the angle range is -25°-25°; the conical water mist nozzle body sprays the conical steam mist to the steel pipe The height of the surface is adjustable within a range of 2000mm-2400mm; the manifold body 302 is in the shape of an ox horn, and the angle between the inclined manifold and the horizontal manifold is in the range of 30°-60°; the inclined manifold and the horizontal manifold are symmetrically arranged with a plurality of ball-articulated water mist nozzles 301 along the bottom surface and the outer side surface respectively; the spray overlap rate of the ball-articulated water mist nozzle 301 is 12%-35%, and the spray height and flow rate of the ball-articulated water mist nozzle 301 are matched with the rotation interval period of the spiral roller to ensure cooling uniformity and achieve precise temperature control.

[0074] In this embodiment, the manifold body 302 is in the shape of an ox horn, ensuring that the cooling water is evenly sprayed onto the surface of the steel pipe from multiple directions, so that the ball-articulated water mist nozzle 301 can cover a larger cooling area, thereby improving the comprehensiveness and uniformity of cooling; the structure of the ball-articulated water mist nozzle 301 can realize flexible nozzle angle adjustment and multi-angle spraying, and the ball-articulated water mist nozzle 301 is respectively connected to multiple second water storage chambers to ensure uniform distribution of cooling water; through the coordinated work of the servo electric cylinder 303 and the folding cylinder 304, the control module can comprehensively adjust the swing angle of the nozzle and the rotation angle of the manifold body 302, ensuring that the cooling water can be accurately and evenly sprayed onto the surface of the steel pipe, thereby achieving the best cooling effect.

[0075] Specifically, in the above embodiment, the number of nozzle manifolds 3 is multiple, the number of cantilever beams 2 is equal to the number of nozzle manifolds 3, and each nozzle manifold 3 is hinged to the cantilever column 1 through a cantilever beam 2;

[0076] The effective cooling length of each nozzle header 3 is in the range of 6000mm-7000mm, and is used to cool the steel pipes to be cooled with an outer diameter in the range of φ100mm-φ300mm after continuous rolling.

[0077] In this embodiment, the effective cooling length range of a single set of nozzle manifolds 3 is 6000mm-7000mm. In specific use, multiple sets of nozzle manifolds 3 can be set according to the specifications and lengths of the hot-rolled seamless steel pipes produced by the production line to perform overall cooling on the entire length of the steel pipes, thereby achieving precise cooling control for steel pipes with an outer diameter range of φ100mm-φ300mm after continuous rolling, thereby improving the cooling efficiency while increasing the use range of the system.

[0078] Specifically, in the above embodiment, if Figure 3 As shown, the water supply unit 4 includes a diversion collecting pipe 401, a bypass pipe 403 and multiple branch water supply pipes 402, and the diversion collecting pipe 401 is respectively connected to the bypass pipe 403 and the multiple branch water supply pipes 402; the diversion collecting pipe 401 is provided with a water pressure sensor 407 and a water temperature sensor 408; the bypass pipe 403 is provided with a manual butterfly valve 404 and a regulating valve 405; the branch water supply pipe 402 is provided with a regulating valve 405 and a flow meter 406; the multiple branch water supply pipes 402 are connected to the nozzle collecting pipe 3 through the cantilever beam 2, and the bypass pipe 403 is used to adjust the water supply pressure and water supply volume of the multiple branch water supply pipes 402, wherein the water supply pressure is 0.2MPa~1.0MPa.

[0079] Among them, the number of branch water supply pipelines 402 is consistent with the number of second water storage chambers in the manifold body 302. A manual butterfly valve 404 and a regulating valve 405 are arranged on the bypass pipeline 403 to realize closed-loop control of the water supply pressure. Real-time adjustment of the water pressure is achieved through PID (Proportional-Integral-Derivative Control) control, and the cooling water supply pressure is controlled to be 0.2MPa-1.0MPa.

[0080] In this embodiment, the water supply unit 4 opens the regulating valve 405 on the branch water supply pipeline 402 based on the control of the control module, and the cooling water flows from the branch water collection pipe 401 through the flow meter 406 and the regulating valve 405 on the branch water supply pipeline 402 to the first water storage chamber in the cantilever beam 201, and then flows into the second water storage chamber in the collection pipe body 302. At the same time, according to the water pressure measured by the water pressure sensor 407 on the branch water collection pipe 401, the regulating valve 405 on the bypass pipeline 403 is automatically adjusted to make the water supply pressure reach the set value. According to the measured value of the flow meter 406 of each branch water supply pipeline 402, the regulating valve 405 on the branch water supply pipeline 402 is automatically adjusted to control the water supply volume in real time to reach the set value. Through the above adjustment, stable cooling water is sprayed onto the surface of the steel pipe through the inner cavity of the ball-hinged water mist nozzle 301.

[0081] Specifically, in the above embodiment, the control module includes a cooling model unit, a PLC control unit and a scanning laser thermometer, and the PLC control unit is respectively connected to the cooling model unit and the scanning laser thermometer; the cooling model unit calculates the preset cooling parameters based on the specifications of the steel pipe to be cooled and the preset cooling temperature, and sends the preset cooling parameters to the PLC control unit; the PLC control unit is respectively controlled and connected to the cantilever column 1, the cantilever beam 2, the nozzle manifold 3 and the water supply unit 4, and the PLC control unit adjusts the cooling process parameters of the cantilever column 1, the cantilever beam 2, the nozzle manifold 3 and the water supply unit 4 based on the preset cooling parameters to control the nozzle manifold 3 to cool the steel pipe to be cooled on the spiral roller; the scanning laser thermometer is arranged next to the spiral roller, for obtaining the full-length temperature of the steel pipe to be cooled and feeding back the full-length temperature to the PLC control unit to adjust the cooling process parameters, and at the same time generate a temperature curve of the steel pipe to be cooled.

[0082] In this embodiment, the cooling model unit calculates the preset cooling parameters based on the specifications of the steel pipe to be cooled and the preset cooling temperature. The model calculation method can provide more accurate cooling parameters to ensure that the cooling process meets the expected requirements; the scanning laser thermometer is arranged next to the spiral roller, which can obtain the full-length temperature of the steel pipe to be cooled in real time and feed the data back to the PLC control unit. By real-time monitoring the temperature distribution of the steel pipe, the cooling process parameters can be adjusted in time to ensure that the temperature of the steel pipe drops evenly during the cooling process, avoiding defects caused by local overcooling or uneven cooling; the PLC control unit is responsible for receiving the cooling model unit The preset cooling parameters of the element are used, and the cooling process parameters of the cantilever column 1, the cantilever beam 2, the nozzle header 3 and the water supply unit 4 are adjusted accordingly, so as to realize the dynamic adjustment of the cooling strategy and improve the adaptability and flexibility of cooling; the scanning laser thermometer can not only provide real-time temperature feedback, but also generate the temperature curve of the steel pipe to be cooled, which is helpful to analyze the temperature change trend during the cooling process of the steel pipe, further optimize the cooling process and improve the quality of the product; the control module adopts a closed-loop control strategy as a whole, which ensures that the cooling system can maintain stable operation under complex working conditions through continuous feedback and adjustment, thereby enhancing the reliability and robustness of the system.

[0083] The present invention provides a method for heat treatment cooling of hot rolled seamless steel pipe, which is applied to any of the above-mentioned online heat treatment cooling systems for hot rolled steel materials, such as Figure 4As shown, the method includes firstly controlling the cantilever crossbeam 2 by a control module to drive the nozzle manifold 3 to rotate around the cantilever column 1, so that the nozzle manifold 3 rotates to the top of the spiral roller, and the nozzle manifold 3 and the steel pipe to be cooled on the spiral roller are kept axially parallel; then the control module calculates the preset cooling parameters based on the specifications of the steel pipe to be cooled and the preset cooling temperature, and adjusts the cooling process parameters of the online heat treatment cooling system of the hot-rolled steel material based on the preset cooling parameters, so as to control the nozzle manifold 3 to cool the steel pipe to be cooled on the spiral roller; finally, the control module obtains the full-length temperature of the steel pipe to be cooled and adjusts the cooling process parameters in real time based on the full-length temperature, and generates a temperature curve of the steel pipe to be cooled.

[0084] The present application provides a heat treatment cooling method for hot-rolled seamless steel pipes. The control module calculates preset cooling parameters according to the specifications of the steel pipe to be cooled, the full-length temperature before cooling, and the preset cooling temperature after cooling. The preset cooling parameters specifically include the steam mist cooling pressure of the spray cooling device, the flow rate and height of the nozzle manifold 3, and controls the spray cooling device to perform a cooling process based on the preset cooling parameters. First, the cantilever crossbeam 2 drives the nozzle manifold 3 to rotate around the cantilever column 1 to the top of the spiral roller, so that the nozzle manifold 3 and the steel pipe to be cooled on the spiral roller are kept axially parallel, and the spray cooling device enters a cooling working state. Thereafter, the water supply unit 4 enters a working state to provide cooling water to the nozzle manifold 3. After the pressure and water supply of the cooling water reach the set values, it is sprayed onto the surface of the steel pipe through the nozzle manifold 3. During this process, the height and rotation angle of the nozzle manifold 3 are adjusted in real time. Finally, the spiral roller intermittently rolls and transports the steel pipe to be cooled based on the set value, realizes steam mist cooling of the steel pipe, and passes the full-length temperature curve verification of the steel pipe after cooling to ensure that the temperature drop of the steel pipe is qualified.

[0085] In the above method, the control module controls the cantilever beam 2 to drive the nozzle manifold 3 to rotate around the cantilever column 1, so that the nozzle manifold 3 is accurately rotated to the top of the spiral roller and keeps the axial direction parallel to the steel pipe to be cooled, ensuring that the nozzle manifold 3 can be accurately aligned with the steel pipe, thereby improving the injection accuracy of cooling water; the module calculates the preset cooling parameters based on the specifications of the steel pipe to be cooled and the preset cooling temperature, thereby ensuring that the cooling process is carried out according to the established goals, thereby improving the controllability and consistency of the cooling process; the control module obtains the full-length temperature of the steel pipe to be cooled during the cooling process, and adjusts the cooling process parameters in real time based on the full-length temperature, so that the system can respond in time according to actual temperature changes, thereby ensuring that the temperature of the steel pipe drops evenly during the entire cooling process, thereby avoiding local overcooling or uneven cooling problems; the overall method adopts a closed-loop control strategy, which ensures that the cooling system can maintain stable operation under complex working conditions through continuous feedback and adjustment, thereby enhancing the reliability and robustness of the system.

[0086] Furthermore, the rotation angle range of the nozzle manifold 3 and the cantilever beam 2 in the horizontal plane is 0-90°, and the method also includes: when the steel pipe to be cooled completes cooling, the control module controls the nozzle manifold 3 to rotate in the horizontal plane until it coincides with the cantilever beam 2 on the same horizontal line, and at the same time, the control module controls the cantilever beam 2 to rotate to the outside of the hot-rolled seamless steel pipe production line to clear the space area in the vertical direction of the spiral roller.

[0087] In this embodiment, the nozzle manifold 3 can be rotated 90° in the horizontal plane, so that the nozzle manifold 3 can be folded and stored under the cantilever beam 2. The cantilever beam 2 and the nozzle manifold 3 can be synchronously rotated in the horizontal plane within a range of 0°-90°, which can clear the space above the spiral roller in the event of a system failure, thereby facilitating fault handling.

[0088] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An online heat treatment cooling system for hot-rolled steel materials, applied to a hot-rolled seamless steel pipe production line, wherein the hot-rolled seamless steel pipe production line comprises a spiral roller arranged between a steel pipe sawing area and a reheating furnace conveyor line, characterized in that: The system comprises a spray cooling device and a control module, wherein the spray cooling device comprises a cantilever column (1), a cantilever beam (2), a nozzle header (3) and a water supply unit (4); The cantilever column (1) is arranged outside the hot-rolled seamless steel pipe production line, and the cantilever crossbeam (2) is hinged to the cantilever column (1); The nozzle manifold (3) is fixed on the cantilever crossbeam (2) and is arranged parallel to the axial direction of the steel pipe to be cooled on the spiral roller; The water supply unit (4) is connected to the nozzle header (3) via the cantilever beam (2) and is used to provide cooling water to the nozzle header (3); The control module is respectively connected to the cantilever column (1), the cantilever beam (2), the nozzle manifold (3) and the water supply unit (4). The control module controls the cantilever column (1) to adjust its height, and / or controls the cantilever beam (2) to rotate around the cantilever column (1), and / or controls the water supply state of the water supply unit (4), and / or controls the position of the nozzle manifold (3), so as to adjust the cooling intensity and cooling method of the nozzle manifold (3) on the steel pipe to be cooled on the spiral roller; The nozzle manifold (3) comprises a ball-hinged water mist nozzle (301) and a manifold body (302), wherein the ball-hinged water mist nozzle (301) is evenly distributed and fixed on the bottom surface and the outer side surface of the manifold body (302); The manifold body (302) is in the shape of an ox horn, and comprises a horizontal manifold and two inclined manifolds, wherein the two inclined manifolds are respectively connected to two ends of the horizontal manifold, and the inclined manifolds are arranged to be inclined away from the ground at a preset angle with the horizontal manifold, wherein the preset angle ranges from 30° to 60°; The ball-articulated water mist nozzle (301) comprises a connected spherical joint and a conical water mist nozzle body, the nozzle caliber range of the conical water mist nozzle body is φ3.1mm-φ4.6mm, the spray angle range of the conical water mist nozzle body is 50°-120°, the spray flow rate range of the conical water mist nozzle body is 1.5m³ / h-6.2m³ / h, the swing angle range of the conical water mist nozzle body is -25°-25°, the height range of the conical water mist sprayed by the ball-articulated water mist nozzle (301) to the surface of the steel pipe to be cooled is 2000mm-2400mm, and the spray overlap rate of two adjacent ball-articulated water mist nozzles (301) is 12%-35%.

2. The online heat treatment cooling system for hot-rolled steel materials according to claim 1 is characterized in that: The cantilever column (1) comprises a fixed base (101), a lifting cylinder (102), a guide rod (103), a guide sleeve (104) and a column (105), wherein a first displacement sensor is installed in the lifting cylinder (102); The bottom of the lifting cylinder (102) is fixedly connected to the top surface of the fixed base (101), and the cylinder rod of the lifting cylinder (102) is spherically hinged at the center of the bottom surface of the column (105); A plurality of guide sleeves (104) are evenly arranged around the lifting cylinder (102) and fixedly connected to the top surface of the fixed base (101); a corresponding guide rod (103) is arranged in each guide sleeve (104); the guide sleeve (104) is sleeved on the outer wall of the guide rod (103); and the guide rod (103) moves along the length direction of the guide sleeve (104); The bottom surface of the column (105) is fixedly connected to the plurality of guide rods (103); The control module is controllably connected to the cantilever column (1) and is used to drive the lifting cylinder (102) to drive the column (105) to move in a vertical direction and receive position information fed back by the first displacement sensor.

3. The online heat treatment cooling system for hot-rolled steel materials according to claim 1, characterized in that: The cantilever cross beam (2) comprises a cantilever beam (201), a shaft sleeve (202), a swing arm oil cylinder (203), an oil cylinder bracket (204), an oil cylinder connecting rod (205), a roller group (206) and a diagonal support bracket (207), wherein a second displacement sensor is installed in the swing arm oil cylinder (203); A plurality of first water storage chambers are arranged in the cantilever beam (201), and the water supply unit (4) is connected to the nozzle manifold (3) via the plurality of first water storage chambers; The shaft sleeve (202) is hinged to the shaft head at the top of the cantilever column (1) through a bearing, the cantilever beam (201) is fixedly connected to the shaft sleeve (202), the diagonal support bracket (207) is fixedly supported between the cantilever beam (201) and the cantilever column (1), and the roller group (206) is arranged on one side of the diagonal support bracket (207) close to the arc surface of the cantilever column (1); The cylinder bracket (204) is fixedly connected to the cantilever column (1), the swing arm cylinder (203) is hinged on the cylinder bracket (204), the cylinder rod of the swing arm cylinder (203) is hinged to the cylinder connecting rod (205), and the cylinder connecting rod (205) is fixedly connected to the shaft sleeve (202); The control module is controllably connected to the cantilever beam (2) and is used to drive the arm cylinder (203) to drive the cantilever beam (201) to rotate around the cantilever column (1), and receive rotation angle information fed back by the second displacement sensor.

4. The online heat treatment cooling system for hot-rolled steel materials according to claim 1, characterized in that: The nozzle manifold (3) further comprises a servo electric cylinder (303), a folding cylinder (304), a cylinder bracket (305), a cylinder connecting rod (306), a folding sleeve (307) and a folding shaft (308); The servo electric cylinder (303) is hinged on the top surface and the inner side surface of the manifold body (302), and the cylinder rod of the servo electric cylinder (303) is hinged on the ball-hinged water mist nozzle (301); The folding sleeve (307) is fixedly connected to one end of the cantilever cross beam (2) away from the cantilever column (1), the first end of the folding shaft (308) is hinged in the folding sleeve (307) through a bearing, and the second end of the folding shaft (308) is fixedly connected to the manifold body (302); The cylinder support (305) is fixed on the cantilever crossbeam (2), the folding cylinder (304) is hinged on the cylinder support (305), the cylinder rod of the folding cylinder (304) is hinged to the cylinder connecting rod (306), and the cylinder connecting rod (306) is fixedly connected to the folding shaft (308); A plurality of second water storage chambers are arranged in the manifold body (302), the second water storage chambers are connected to the water supply unit (4) via the cantilever beam (2), and the second water storage chambers are also connected to the ball-hinged water mist nozzle (301); The control module is connected to the nozzle manifold (3) and is used to drive the servo electric cylinder (303) to control the swing of the ball-hinged water mist nozzle (301) and adjust the swing angle, and / or drive the folding cylinder (304) to drive the manifold body (302) to rotate around the folding axis (308).

5. The online heat treatment cooling system for hot-rolled steel material according to claim 4, characterized in that: The second end of the folding shaft (308) is fixedly connected to the center of the horizontal header, and a plurality of the ball-hinged water mist nozzles (301) are evenly arranged along the bottom surface and outer side surface of the horizontal header and the inclined header; The spherical joint is connected to the second water storage chamber, and the cylinder rod of the servo electric cylinder (303) is hinged to the spherical joint to adjust the spray height and swing angle of the conical water mist nozzle body.

6. The online heat treatment cooling system for hot rolled steel material according to claim 1 or 4, characterized in that: The number of the nozzle manifolds (3) is multiple, the number of the cantilever cross beams (2) is equal to the number of the nozzle manifolds (3), and each of the nozzle manifolds (3) is hinged to the cantilever column (1) via a cantilever cross beam (2); The effective cooling length of each nozzle header (3) is in the range of 6000mm-7000mm, and is used to cool the steel pipe to be cooled with an outer diameter in the range of φ100mm-φ300mm after continuous rolling.

7. The online heat treatment cooling system for hot rolled steel material according to claim 1, characterized in that: The water supply unit (4) comprises a diversion collecting pipe (401), a bypass pipeline (403) and a plurality of diversion water supply pipelines (402); the diversion collecting pipe (401) is respectively connected to the bypass pipeline (403) and the plurality of diversion water supply pipelines (402); The diversion water collecting pipe (401) is provided with a water pressure sensor (407) and a water temperature sensor (408); The bypass pipeline (403) is provided with a manual butterfly valve (404) and a regulating valve (405); The branch water supply pipeline (402) is provided with a regulating valve (405) and a flow meter (406); The plurality of branch water supply pipelines (402) are connected to the nozzle manifold (3) via the cantilever crossbeam (2), and the bypass pipeline (403) is used to adjust the water supply pressure and water supply volume of the plurality of branch water supply pipelines (402), wherein the water supply pressure is 0.2MPa-1.0MPa.

8. The online heat treatment cooling system for hot-rolled steel material according to claim 1, characterized in that: The control module includes a cooling model unit, a PLC control unit and a scanning laser thermometer, and the PLC control unit is connected to the cooling model unit and the scanning laser thermometer respectively; The cooling model unit calculates preset cooling parameters based on the specifications of the steel pipe to be cooled and the preset cooling temperature, and sends the preset cooling parameters to the PLC control unit; The PLC control unit is respectively connected to the cantilever column (1), the cantilever beam (2), the nozzle header (3) and the water supply unit (4), and the PLC control unit adjusts the cooling process parameters of the cantilever column (1), the cantilever beam (2), the nozzle header (3) and the water supply unit (4) based on the preset cooling parameters, so as to control the nozzle header (3) to cool the steel pipe to be cooled on the spiral roller; The scanning laser thermometer is arranged beside the spiral roller, and is used to obtain the full-length temperature of the steel pipe to be cooled and feed the full-length temperature back to the PLC control unit to adjust the cooling process parameters, and at the same time generate a temperature curve of the steel pipe to be cooled.

9. A method for heat treatment cooling of hot rolled seamless steel pipe, characterized in that: The method is applied to an online heat treatment cooling system for hot-rolled steel materials according to any one of claims 1 to 8, and the method comprises: The control module controls the cantilever crossbeam (2) to drive the nozzle manifold (3) to rotate around the cantilever column (1), so that the nozzle manifold (3) rotates to above the spiral roller, and the nozzle manifold (3) and the steel pipe to be cooled on the spiral roller are kept axially parallel; The control module calculates preset cooling parameters based on the specifications of the steel pipe to be cooled and the preset cooling temperature, and adjusts the cooling process parameters of the hot-rolled steel material online heat treatment cooling system based on the preset cooling parameters to control the nozzle manifold (3) to cool the steel pipe to be cooled on the spiral roller; The control module obtains the full-length temperature of the steel pipe to be cooled and adjusts the cooling process parameters in real time based on the full-length temperature, and generates a temperature curve of the steel pipe to be cooled.

10. The method according to claim 9, characterized in that The rotation angle of the nozzle manifold (3) and the cantilever beam (2) on the horizontal plane ranges from 0° to 90°, and the method further comprises: When the steel pipe to be cooled is completely cooled, the control module controls the nozzle manifold (3) to rotate in a horizontal plane until it overlaps with the cantilever beam (2) on the same horizontal line. At the same time, the control module controls the cantilever beam (2) to rotate to the outside of the hot-rolled seamless steel pipe production line to clear the space area in the vertical direction of the spiral roller.

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