A circulating water-cooled steel continuous casting system

Abstract

The present invention relates to the technical field of steel continuous casting, and discloses a circulating water-cooled steel continuous casting system, including a cooling water recovery tank, a support frame is provided on the upper side of the cooling water recovery tank, and a first water pipe is provided on the support frame, and a plurality of nozzles are provided on the first water pipe, and a circulating pump is provided in the cooling water recovery tank, and the outlet of the circulating pump is connected to the first water pipe through a second water pipe. This technical solution is provided with a connecting rod with a limit spring and a connecting seat used in conjunction with it. When the adjustment range of the flow is small, the existence of the speed limiting mechanism of the adjustment seat will not interfere with the movement of the adjustment seat. That is to say, within a certain adjustment range, the adjustment seat can respond quickly and is not prone to the problem of untimely cooling. When the adjustment range of the flow is large, the speed limiting mechanism of the adjustment seat can limit the movement speed of the adjustment seat to prevent the problem of excessive cooling.

Description

Technical Field

[0001] The invention relates to the technical field of steel continuous casting, in particular to a circulating water-cooled steel continuous casting system. Background Art

[0002] Continuous casting is a process that can directly cast liquid steel into shaped steel products through a continuous casting machine. Compared with traditional methods, continuous casting technology has significant advantages such as greatly improving metal recovery rate and ingot quality, saving energy, etc. The continuous casting system mainly includes a holding furnace, a crystallizer composed of a graphite sleeve and a water-cooling sleeve (primary cooling), a cooling mechanism (secondary cooling), a conveying mechanism, a traction mechanism and a cutting mechanism. The molten iron enters the crystallizer from the holding furnace, and after cooling in the crystallizer, a billet with a shell of a certain thickness is formed, and then a large amount of heat is taken away through secondary cooling. The secondary cooling of continuous casting directly affects the quality of the billet. Uneven secondary cooling causes large thermal stress in the local area of ​​the billet, thereby causing cracks in corners and other areas.

[0003] During secondary cooling, the water volume needs to be adjusted so that the temperature of each part of the billet will not differ greatly during cooling. The commonly used water volume adjustment method is the proportional control method, the principle of which is to control the certain proportional relationship between the secondary cooling water volume and the drawing speed. The technical personnel obtain the process parameters obtained through previous production experience, such as different steel grades, billet cross-sections, sizes and shapes, and billet drawing speed, and process the secondary cooling water volume into data and store them in a computer or programmable logic controller (PLC) to generate a corresponding proportional relationship, and use the computer or PLC to control the valve to increase or decrease the cooling water volume;

[0004] Compared with the manual control method, the control method based on the proportional relationship between process parameters and water volume is more real-time and more accurate in monitoring the pulling speed. It can ensure that the surface temperature of the ingot is more uniform and closer to the target temperature under smooth and non-mutational conditions. However, if the pulling speed changes significantly, the controller will immediately control the valve according to the change, causing a large increase or decrease in the water volume, thereby leading to a drastic change in the surface temperature of the ingot, which can easily cause cracks in the billet and affect the quality of the ingot. Summary of the invention

[0005] The present invention provides a circulating water-cooled steel continuous casting system, which has the beneficial effect of not causing large differences when adjusting the water volume. It solves the problem mentioned in the above background technology that when the pulling speed changes to a large extent, the controller will immediately control the valve according to the change, causing a large increase or decrease in the water volume, thereby leading to a drastic change in the surface temperature of the ingot, which is easy to cause cracks in the steel ingot and affect the quality of the ingot.

[0006] The present invention provides the following technical solution: a circulating water-cooled steel continuous casting system, comprising a cooling water recovery tank, a support frame is provided on the upper side of the cooling water recovery tank, a first water delivery pipe is provided on the support frame, a plurality of nozzles are provided on the first water delivery pipe, a circulating pump is provided in the cooling water recovery tank, and a water outlet of the circulating pump is connected to the first water delivery pipe through a second water delivery pipe;

[0007] A flow regulating assembly is provided on the second water supply pipe, and a flow regulating assembly regulating mechanism is provided on one side of the second water supply pipe, the flow regulating assembly regulating mechanism includes a fixing frame, and an adjusting seat is provided on one side of the fixing frame, a liquid storage tank is provided inside the adjusting seat, and the adjusting seat is elastically connected to the fixing frame through a tension spring, a delivery pump for supplying water to the liquid storage tank is provided in the cooling water recovery tank, and the flow regulating assembly is transmission-connected to the adjusting seat through a transmission mechanism.

[0008] As an optional solution of the circulating water-cooled steel continuous casting system described in the present invention, the flow regulating component includes a valve body, and a movable gate plate is provided in the valve body, a first through hole is provided on the gate plate, a valve stem is provided on the outer side of the valve body, and one end of the valve stem is fixedly connected to the gate plate.

[0009] As an optional solution of the circulating water-cooled steel continuous casting system described in the present invention, the transmission mechanism includes a first shell, a transmission shaft is provided in the first shell, and a first transmission gear and a second transmission gear are provided on the transmission shaft, a first rack meshing with the first transmission gear is provided at one end of the first shell, and one end of the first rack is fixedly connected to the adjustment seat, and a second rack meshing with the second transmission gear is provided at the other end of the first shell, and one end of the second rack is fixedly connected to the valve stem.

[0010] As an optional solution of the circulating water-cooled steel continuous casting system described in the present invention, wherein: the fixed frame is provided with an adjusting seat speed limiting mechanism, the adjusting seat speed limiting mechanism includes a second shell, and the second shell is fixedly connected to the fixed frame, a cavity is provided in the second shell, and a piston is provided in the cavity, a plurality of second through holes are provided on the piston, and a connecting rod is provided at one end of the second shell, and one end of the connecting rod is fixedly connected to the piston.

[0011] As an optional solution of the circulating water-cooled steel continuous casting system described in the present invention, a connecting seat is provided in the middle of the fixed frame, the connecting seat is slidably connected to the fixed frame, and one end of the connecting seat is fixedly connected to the adjustment seat, and the other end of the connecting seat is slidably connected to the connecting rod, and a limit spring is provided at one end of the connecting rod close to the connecting seat.

[0012] As an optional solution of the circulating water-cooled steel continuous casting system described in the present invention, a filter seat is further provided on the second water supply pipe, and a filter net is provided inside the filter seat.

[0013] As an optional solution of the circulating water-cooled steel continuous casting system described in the present invention, a filter cleaning mechanism is also provided in the filter seat, and the filter cleaning mechanism includes a fixed shaft, the fixed shaft is rotatably connected to the filter, and a third transmission gear is provided at one end of the fixed shaft, and a brush plate assembly is provided at the other end of the fixed shaft.

[0014] As an optional solution of the circulating water-cooled steel continuous casting system described in the present invention, a third rack is provided at one end of the adjustment seat, and one end of the third rack passes through the filter seat and meshes with the third transmission gear.

[0015] As an optional solution of the circulating water-cooled steel continuous casting system described in the present invention, the brush plate assembly includes a fixed seat, a scraper is provided on one side of the fixed seat, the scraper is elastically connected to the fixed seat through a first spring, and a plurality of first protrusions are provided on one side of the scraper, and a plurality of brush heads are provided between the first protrusions;

[0016] An adjustment plate for adjusting the position of the scraper is provided on the other side of the fixed seat, and the adjustment plate is elastically connected to the fixed seat through a second spring, an extension column is provided on the side of the adjustment plate close to the fixed seat, and a second protrusion is provided on the side of the scraper close to the fixed seat, the position of the second protrusion is opposite to the extension column, and one end of the second protrusion is provided with a slope.

[0017] As an optional solution of the circulating water-cooled steel continuous casting system described in the present invention, a drain port is provided on one side of the adjustment seat, and a water pump is provided inside the adjustment seat, and the water outlet end of the water pump is connected to the drain port.

[0018] The present invention has the following beneficial effects:

[0019] 1. A circulating water-cooled steel continuous casting system is provided with a flow regulating assembly regulating mechanism, which includes a fixed frame, a slidable regulating seat is provided on the fixed frame, the regulating seat is connected to the valve stem on the gate plate through a transmission mechanism, and the height of the valve stem can be adjusted by adjusting the position of the regulating seat. The valve stem is fixedly connected to the gate plate, and the relative position of the gate plate and the valve body is different, and the flow rate is also different;

[0020] In order to prevent large fluctuations in the cooling water flow rate due to large changes in the pulling speed, the present technical solution also provides an adjusting seat speed limiting mechanism, which includes a second outer shell, a cavity is provided in the second outer shell, and the cavity is filled with liquid and a piston. When the adjusting seat moves, the adjusting seat will drive the connecting seat to move. Driven by the connecting seat, the connecting rod will carry the piston to move in the second outer shell. As the piston moves, the liquid on one side of the piston needs to flow to the other side of the piston through the second through hole. Since the flow rate of the second through hole is small, the movement speed of the piston is smaller than that of the adjusting seat and the connecting seat. The presence of the piston will slow down the movement speed of the connecting rod, thereby decelerating the connecting seat and the adjusting seat.

[0021] 2. A circulating water-cooled steel continuous casting system is provided with a connecting rod with a limit spring at the end. When the movement amplitude of the adjusting seat is small, the adjusting seat will first move with the connecting seat. At this time, the gap between the end of the connecting rod with the limit spring and the connecting seat becomes larger, and the limit spring accumulates force. Then, driven by the limit spring, the connecting rod moves slowly with the piston. When the movement amplitude of the adjusting seat exceeds the stretching limit of the limit spring, the existence of the connecting rod and the piston will interfere with the movement of the connecting seat and the adjusting seat. The connecting seat and the adjusting seat can only move synchronously with the connecting rod and the piston.

[0022] This technical solution provides a connecting rod with a limiting spring and a connecting seat used in conjunction therewith. When the flow adjustment range is small, the existence of the adjusting seat speed limiting mechanism will not interfere with the movement of the adjusting seat. That is to say, within a certain adjustment range, the adjusting seat can respond quickly and is less likely to have problems with untimely cooling. When the flow adjustment range is large, the adjusting seat speed limiting mechanism can limit the movement speed of the adjusting seat to prevent the problem of excessive cooling.

[0023] 3. This circulating water-cooled steel continuous casting system is provided with a filter seat, in which a filter screen is provided, which can be used to filter debris. In order to prevent the debris from clogging the filter screen and thus affecting the flow rate, the technical solution also provides a filter screen cleaning mechanism, which includes a fixed shaft, on which a third transmission gear and a brush plate assembly are provided. The adjustment seat is connected to the fixed shaft through a third rack and a third transmission gear. When the fixed shaft rotates, the brush plate assembly can be driven to rotate, thereby cleaning the filter screen. By providing an adjustment seat with a third rack and a fixed shaft with a third transmission gear used in conjunction with the adjustment seat, the fixed shaft can be driven to rotate during the adjustment of the adjustment seat, and the filter screen can be cleaned through the brush plate assembly, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure of the flow regulating component of the present invention.

[0026] Figure 3 It is a schematic diagram of the internal structure of the valve body of the present invention.

[0027] Figure 4 It is a schematic diagram of the transmission shaft structure of the present invention.

[0028] Figure 5 It is a schematic diagram of the internal structure of the adjustment seat of the present invention.

[0029] Figure 6 It is a schematic diagram of the internal structure of the filter seat of the present invention.

[0030] Figure 7 It is a top view of the fixing seat of the present invention.

[0031] Figure 8 It is a schematic diagram of the internal structure of the second shell of the present invention.

[0032] In the figure: 1, cooling water recovery tank; 2, support frame; 3, first water pipe; 301, nozzle; 4, circulation pump; 5, second water pipe; 6, fixing frame; 7, adjustment seat; 701, liquid storage tank; 702, liquid discharge port; 703, water pump; 8, tension spring; 9, delivery pump; 10, valve body; 1001, gate; 1002, first through hole; 1003, valve stem; 11, first housing; 12, transmission shaft; 13, first transmission gear; 14, second transmission gear; 15, first rack; 16 , second rack; 17, second housing; 1701, cavity; 1702, piston; 1703, second through hole; 18, connecting rod; 19, connecting seat; 20, limit spring; 21, filter seat; 22, filter screen; 23, fixed shaft; 24, third transmission gear; 25, third rack; 26, fixed seat; 27, scraper; 2701, first protrusion; 2702, brush head; 28, adjustment plate; 29, extension column; 30, second protrusion; 31, second spring; 32, first spring; DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0034] See also Figures 1 to 8A circulating water-cooled steel continuous casting system comprises a cooling water recovery tank 1, a support frame 2 is provided on the upper side of the cooling water recovery tank 1, a first water pipe 3 is provided on the support frame 2, a plurality of nozzles 301 are provided on the first water pipe 3, a circulating pump 4 is provided in the cooling water recovery tank 1, and a water outlet of the circulating pump 4 is connected to the first water pipe 3 through a second water pipe 5;

[0035] A flow regulating assembly is provided on the second water delivery pipe 5, and a flow regulating assembly regulating mechanism is provided on one side of the second water delivery pipe 5, the flow regulating assembly regulating mechanism includes a fixing frame 6, and an adjusting seat 7 is provided on one side of the fixing frame 6, a liquid storage tank 701 is provided inside the adjusting seat 7, and the adjusting seat 7 is elastically connected to the fixing frame 6 through a tension spring 8, a delivery pump 9 for supplying water to the liquid storage tank 701 is provided in the cooling water recovery tank 1, and the flow regulating assembly is transmission-connected to the adjusting seat 7 through a transmission mechanism;

[0036] A liquid discharge port 702 is provided on one side of the adjusting seat 7 , and a water pump 703 is provided inside the adjusting seat 7 , and a water outlet end of the water pump 703 is communicated with the liquid discharge port 702 .

[0037] The flow regulating assembly includes a valve body 10 , and a movable gate plate 1001 is provided in the valve body 10 , a first through hole 1002 is provided on the gate plate 1001 , a valve stem 1003 is provided on the outer side of the valve body 10 , and one end of the valve stem 1003 is fixedly connected to the gate plate 1001 .

[0038] A support frame 2 with a first water pipe 3 is provided, a plurality of nozzles 301 are provided on the first water pipe 3, a cooling water recovery tank 1 and a circulation pump 4 for supplying water to the nozzles 301 are provided on the lower side of the support frame 2, the circulation pump 4 transports the water in the cooling water recovery tank 1 to the first water pipe 3 and sprays the water on the workpiece through the nozzles 301, so as to cool the workpiece, and the sprayed cooling water can be recovered through the cooling water recovery tank 1, and this cycle repeats.

[0039] In order to adjust the flow rate, the technical solution provides a flow regulating assembly, which includes a valve body 10, a gate plate 1001 that can be raised and lowered is provided in the valve body 10, and a first through hole 1002 that is opposite to the pipeline is provided on the gate plate 1001. Under normal circumstances, the first through hole 1002 is opposite to the pipeline. When the gate plate 1001 is moved, the first through hole 1002 will be offset from the flow channel in the pipeline, so that the flow rate will change;

[0040] In order to facilitate the adjustment of the flow regulating component, the present technical solution further provides an adjustment mechanism for the flow regulating component, which includes a fixed frame 6, a slidable adjustment seat 7 is provided on the fixed frame 6, a liquid storage tank 701 is provided in the adjustment seat 7, and correspondingly, a delivery pump 9 for supplying water to the adjustment seat 7 is provided in the cooling water recovery tank 1, and the adjustment seat 7 is connected to the valve stem 1003 on the gate plate 1001 through a transmission mechanism. By adjusting the position of the adjustment seat 7, the height of the valve stem 1003 can be adjusted. The valve stem 1003 is fixedly connected to the gate plate 1001, and the relative position of the gate plate 1001 and the valve body 10 is different, and its flow rate is also different;

[0041] Specific working principle: the adjusting seat 7 is elastically connected to the fixing frame 6 through the tension spring 8. The weight of the adjusting seat 7 can be adjusted by injecting water into the adjusting seat 7 or discharging the water in the adjusting seat 7. The heavier the weight of the adjusting seat 7 is, the more it will overcome the resistance of the tension spring 8 under the action of its own weight and move farther away from the top of the fixing frame 6. The water in the cooling water recovery tank 1 can be delivered to the adjusting seat 7 by the delivery pump 9. A water pump 703 is also provided in the adjusting seat 7. The water in the adjusting seat 7 can be pumped out by the water pump 703 and discharged through the drain port 702, so as to achieve the purpose of increasing or decreasing the weight of the adjusting seat 7.

[0042] In the present technical solution, the delivery pump 9, the water pump 703 and the circulation pump 4 are all connected to the host computer via a wireless network and controlled by the host computer. The overall flow regulation is in a certain proportional relationship with the drawing speed of the casting, that is, the faster the drawing speed, the greater the flow, and the smaller the drawing speed, the smaller the flow. How the delivery pump 9, the water pump 703, the circulation pump 4 are connected to the host computer, and how the host computer controls the lower computer are all common technical means in this field and will not be elaborated here.

[0043] In order to prevent the cooling water flow from fluctuating greatly due to the large change of the pulling speed, the present technical solution is further provided with an adjusting seat speed limiting mechanism, which includes a second shell 17, a cavity 1701 is provided in the second shell 17, the cavity 1701 is filled with liquid and a piston 1702, a second through hole 1703 for liquid circulation is provided on the piston 1702, a connecting rod 18 and a connecting seat 19 are provided at one end of the second shell 17, the connecting seat 19 is fixedly connected to the adjusting seat 7, and the connecting seat 19 is slidably connected to the connecting rod 18, the connecting rod 18 is fixedly connected to the piston 1702, and a limit spring 20 is further provided on the connecting rod 18, one end of the limit spring 20 is fixedly connected to the connecting seat 19, and the other end is fixedly connected to the connecting rod 18;

[0044] Since the second housing 17 is fixedly connected to the fixing frame 6, when the adjusting seat 7 moves, the adjusting seat 7 will drive the connecting seat 19 to move. Driven by the connecting seat 19, the connecting rod 18 will drive the piston 1702 to move in the second housing 17. As the piston 1702 moves, the liquid on one side of the piston 1702 needs to flow to the other side of the piston 1702 through the second through hole 1703. Since the flow rate of the second through hole 1703 is small, the movement speed of the piston 1702 is smaller than that of the adjusting seat 7 and the connecting seat 19. The presence of the piston 1702 will slow down the movement speed of the connecting rod 18, thereby playing a decelerating role on the connecting seat 19 and the adjusting seat 7.

[0045] In order to prevent the existence of the adjusting seat speed limiting mechanism from interfering with the movement of the adjusting seat 7 during small-amplitude adjustment, the present technical solution provides a connecting rod 18 with a limiting spring 20 at the end. When the movement amplitude of the adjusting seat 7 is small, the adjusting seat 7 will first move with the connecting seat 19. At this time, the gap between the end of the connecting rod 18 with the limiting spring 20 and the connecting seat 19 becomes larger, and the limiting spring 20 accumulates force. Then, driven by the limiting spring 20, the connecting rod 18 moves slowly with the piston 1702. When the movement amplitude of the adjusting seat 7 exceeds the tensile limit of the limiting spring 20, at this time, the existence of the connecting rod 18 and the piston 1702 will interfere with the movement of the connecting seat 19 and the adjusting seat 7. The connecting seat 19 and the adjusting seat 7 can only move synchronously with the connecting rod 18 and the piston 1702, thereby effectively limiting the speed of the adjusting seat 7. Example 2

[0046] This embodiment is an explanation based on the embodiment 1. For details, please refer to Figures 1 to 8 The transmission mechanism includes a first shell 11, a transmission shaft 12 is provided in the first shell 11, and a first transmission gear 13 and a second transmission gear 14 are provided on the transmission shaft 12, a first rack 15 meshing with the first transmission gear 13 is provided at one end of the first shell 11, and one end of the first rack 15 is fixedly connected to the adjustment seat 7, and a second rack 16 meshing with the second transmission gear 14 is provided at the other end of the first shell 11, and one end of the second rack 16 is fixedly connected to the valve stem 1003.

[0047] An adjusting seat speed limiting mechanism is provided on the fixing frame 6, and the adjusting seat speed limiting mechanism includes a second shell 17, and the second shell 17 is fixedly connected to the fixing frame 6, a cavity 1701 is provided in the second shell 17, and a piston 1702 is provided in the cavity 1701, and a plurality of second through holes 1703 are provided on the piston 1702, and a connecting rod 18 is provided at one end of the second shell 17, and one end of the connecting rod 18 is fixedly connected to the piston 1702.

[0048] A connecting seat 19 is provided in the middle of the fixing frame 6, and the connecting seat 19 is slidably connected to the fixing frame 6, and one end of the connecting seat 19 is fixedly connected to the adjustment seat 7, and the other end of the connecting seat 19 is slidably connected to the connecting rod 18, and a limit spring 20 is provided at one end of the connecting rod 18 close to the connecting seat 19.

[0049] The transmission mechanism is composed of a transmission shaft 12, a first rack 15, and a second rack 16. A first transmission gear 13 and a second transmission gear 14 are provided on the transmission shaft 12. The transmission ratio of the first rack 15 and the first transmission gear 13 is different from the transmission ratio of the second rack 16 and the second transmission gear 14. Different adjustment effects can be achieved by replacing gears and racks with different transmission ratios. Example 3

[0050] This embodiment is an explanation based on the embodiment 1. For details, please refer to Figures 1 to 8 A filter seat 21 is also provided on the second water delivery pipe 5 , and a filter net 22 is provided inside the filter seat 21 .

[0051] A filter cleaning mechanism is also provided in the filter seat 21, and the filter cleaning mechanism includes a fixed shaft 23, the fixed shaft 23 is rotatably connected to the filter 22, and a third transmission gear 24 is provided at one end of the fixed shaft 23, and a brush plate assembly is provided at the other end of the fixed shaft 23.

[0052] A third rack 25 is disposed at one end of the adjustment seat 7 , and one end of the third rack 25 passes through the filter seat 21 and meshes with the third transmission gear 24 .

[0053] The brush plate assembly includes a fixed seat 26, a scraper 27 is provided on one side of the fixed seat 26, the scraper 27 is elastically connected to the fixed seat 26 through a first spring 32, and a plurality of first protrusions 2701 are provided on one side of the scraper 27, and a plurality of brush heads 2702 are provided between the first protrusions 2701;

[0054] An adjusting plate 28 for adjusting the position of the scraper 27 is provided on the other side of the fixed seat 26, and the adjusting plate 28 is elastically connected to the fixed seat 26 through a second spring 31. An extension column 29 is provided on the side of the adjusting plate 28 close to the fixed seat 26, and a second protrusion 30 is provided on the side of the scraper 27 close to the fixed seat 26. The position of the second protrusion 30 is opposite to the extension column 29, and one end of the second protrusion 30 is provided with a slope.

[0055] After a long period of water supply and drainage, the circulating water will contain certain grease and suspended debris, which can easily clog the nozzle 301. To solve the above problem, the present technical solution further provides a filter seat 22 for filtering debris. A filter screen 22 is provided in the filter seat 21. To prevent debris from clogging the filter screen 22 and thus affecting the flow rate, the present technical solution further provides a filter screen cleaning mechanism, which includes a fixed shaft 23, which is rotatably connected to the filter seat 21. A third transmission gear 24 and a brush plate assembly are provided on the fixed shaft 23. The adjustment seat 7 is transmission-connected to the fixed shaft 23 through a third rack 25 and a third transmission gear 24. When the fixed shaft 23 rotates, the brush plate assembly can be driven to rotate, thereby cleaning the filter screen 22. By providing an adjustment seat 7 with a third rack 25 and a fixed shaft 23 with a third transmission gear 24 used in conjunction therewith, the fixed shaft 23 can be driven to rotate during the adjustment of the adjustment seat 7, thereby cleaning the filter screen 22 through the brush plate assembly, which is more convenient to use.

[0056] The brush plate assembly includes a fixed seat 26, on which a slidable scraper 27 is provided, and on the other side of the fixed seat 26, an adjusting plate 28 for adjusting the scraper 27 is provided. When water flows through the filter seat 26, it will impact the adjusting plate 28, thereby pushing the adjusting plate 28 to move toward the fixed seat 26. As the water pressure fluctuates, the distance between the adjusting plate 28 and the fixed seat 26 will also change continuously. Under the push of the adjusting plate 28, the extension column 29 contacts the second protrusion 30. Since the second protrusion 30 is provided with a slope, under the push of the extension column 29, the scraper 27 is relatively slidably connected to the fixed seat 26. The filter screen 22 can be cleaned by the brush head 2702 and the first protrusion 2701 on the scraper 27. The scraper 27 can not only rotate with the fixed seat 26, but also slide relative to the fixed seat 26 during the rotation process, so that there are fewer dead corners for cleaning.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A circulating water-cooled steel continuous casting system, comprising a cooling water recovery tank (1), characterized in that: A support frame (2) is provided on the upper side of the cooling water recovery tank (1), and a first water pipe (3) is provided on the support frame (2), and a plurality of nozzles (301) are provided on the first water pipe (3). A circulation pump (4) is provided in the cooling water recovery tank (1), and a water outlet of the circulation pump (4) is connected to the first water pipe (3) through a second water pipe (5); The second water delivery pipe (5) is provided with a flow regulating assembly, and a flow regulating assembly regulating mechanism is provided on one side of the second water delivery pipe (5), the flow regulating assembly regulating mechanism comprises a fixing frame (6), and an adjusting seat (7) is provided on one side of the fixing frame (6), a liquid storage tank (701) is provided inside the adjusting seat (7), and the adjusting seat (7) is elastically connected to the fixing frame (6) via a tension spring (8), a delivery pump (9) for supplying water to the liquid storage tank (701) is provided inside the cooling water recovery tank (1), and the flow regulating assembly is transmission-connected to the adjusting seat (7) via a transmission mechanism; The flow regulating assembly comprises a valve body (10), wherein a movable gate plate (1001) is provided in the valve body (10), a first through hole (1002) is provided on the gate plate (1001), a valve stem (1003) is provided on the outer side of the valve body (10), and one end of the valve stem (1003) is fixedly connected to the gate plate (1001); The transmission mechanism comprises a first housing (11), a transmission shaft (12) is provided in the first housing (11), and a first transmission gear (13) and a second transmission gear (14) are provided on the transmission shaft (12); a first rack (15) meshing with the first transmission gear (13) is provided at one end of the first housing (11), and one end of the first rack (15) is fixedly connected to the adjustment seat (7); a second rack (16) meshing with the second transmission gear (14) is provided at the other end of the first housing (11), and one end of the second rack (16) is fixedly connected to the valve stem (1003); The fixing frame (6) is provided with an adjusting seat speed limiting mechanism, the adjusting seat speed limiting mechanism comprising a second shell (17), the second shell (17) being fixedly connected to the fixing frame (6), a cavity (1701) being provided in the second shell (17), a piston (1702) being provided in the cavity (1701), a plurality of second through holes (1703) being provided in the piston (1702), a connecting rod (18) being provided at one end of the second shell (17), and one end of the connecting rod (18) being fixedly connected to the piston (1702); A connecting seat (19) is provided in the middle of the fixing frame (6), the connecting seat (19) is slidably connected to the fixing frame (6), one end of the connecting seat (19) is fixedly connected to the adjustment seat (7), the other end of the connecting seat (19) is slidably connected to the connecting rod (18), and a limit spring (20) is provided at one end of the connecting rod (18) close to the connecting seat (19).

2. A circulating water-cooled steel continuous casting system according to claim 1, characterized in that: The second water delivery pipe (5) is also provided with a filter seat (21), and a filter net (22) is provided inside the filter seat (21).

3. A circulating water-cooled steel continuous casting system according to claim 2, characterized in that: A filter screen cleaning mechanism is also provided in the filter seat (21), and the filter screen cleaning mechanism comprises a fixed shaft (23), the fixed shaft (23) is rotatably connected to the filter screen (22), a third transmission gear (24) is provided at one end of the fixed shaft (23), and a brush plate assembly is provided at the other end of the fixed shaft (23).

4. A circulating water-cooled steel continuous casting system according to claim 3, characterized in that: A third rack (25) is provided at one end of the adjustment seat (7), and one end of the third rack (25) passes through the filter seat (21) and meshes with the third transmission gear (24).

5. A circulating water-cooled steel continuous casting system according to claim 4, characterized in that: The brush plate assembly comprises a fixed seat (26), a scraper (27) is provided on one side of the fixed seat (26), the scraper (27) is elastically connected to the fixed seat (26) via a first spring (32), and a plurality of first protrusions (2701) are provided on one side of the scraper (27), and a plurality of brush heads (2702) are provided between the first protrusions (2701); An adjustment plate (28) for adjusting the position of the scraper (27) is provided on the other side of the fixing seat (26), and the adjustment plate (28) is elastically connected to the fixing seat (26) via a second spring (31); an extension column (29) is provided on the side of the adjustment plate (28) close to the fixing seat (26); a second protrusion (30) is provided on the side of the scraper (27) close to the fixing seat (26); the second protrusion (30) is located opposite to the extension column (29), and one end of the second protrusion (30) is provided with an inclined surface.

6. A circulating water-cooled steel continuous casting system according to claim 1, characterized in that: A liquid discharge port (702) is provided on one side of the adjustment seat (7), and a water pump (703) is provided inside the adjustment seat (7), and a water outlet end of the water pump (703) is in communication with the liquid discharge port (702).

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