Hydraulic cooling device for a continuous casting machine and cooling method

Abstract

The present application relates to the technical field of cooling of hydraulic cylinder of metallurgical continuous casting machine cooling bed, in particular to a continuous casting machine hydraulic cooling device and a cooling method, the continuous casting machine hydraulic cooling device comprises a support and a spraying mechanism, the spraying mechanism comprises a water pipe and a spray head, the spray head is arranged on the water pipe, and the water pipe is arranged on the support, wherein the water pipe is used for surrounding the outer circumferential side of the hydraulic cylinder of the continuous casting machine, and the spray head is used for spraying cooling water to the hydraulic cylinder, the continuous casting machine hydraulic cooling device and the cooling method can improve the cooling effect, and the structure of the cooling device is simple, so that maintenance can be carried out when faults and damages occur.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling of hydraulic cylinders of a metallurgical continuous casting machine cooling bed, in particular to a continuous casting machine hydraulic cooling device and a cooling method. BACKGROUND

[0002] The hydraulic cylinder of the continuous casting cooling bed usually needs to work for a long time in a high temperature area. The ambient temperature of the cooling bed is about 200 DEG C. Without cooling, the temperature of the hydraulic cylinder body is basically 70 DEG C-100 DEG C, or even higher. The sealing ring inside the cylinder body is resistant to temperature below 70 DEG C. Due to long-term high-temperature baking, the high temperature of the cylinder body will cause the sealing ring to age rapidly, resulting in hydraulic cylinder oil leakage and internal pressure leakage. The hydraulic cylinder must be replaced as a whole. The actual service life of the hydraulic cylinder is about 4 months. The price of each hydraulic cylinder is 10,000 yuan. The cooling bed has 4 hydraulic cylinders. The average replacement of 6-8 hydraulic cylinders per year costs about 200,000 yuan in spare parts and labor costs. The replacement must be stopped, and the replacement time is as long as 4 hours. In order to improve the problem of frequent replacement and maintenance of the hydraulic cylinder, the related technology usually cools the hydraulic cylinder.

[0003] However, the cooling method provided by the related technology has poor effect, and the structure of the cooling device is complex. If there is a failure or damage, it is not convenient to maintain. SUMMARY

[0004] The purpose of the present application is to provide a continuous casting machine hydraulic cooling device and a cooling method, which can improve the cooling effect, and the structure of the cooling device is simple, and convenient to maintain when failure or damage occurs.

[0005] The embodiment of the present application is implemented as follows:

[0006] In a first aspect, the present application provides a continuous casting machine hydraulic cooling device, comprising:

[0007] A support;

[0008] A spraying mechanism, the spraying mechanism comprising a water pipe and a spray head, the spray head being arranged on the water pipe, and the water pipe being arranged on the support, wherein the water pipe is arranged around the outer circumferential side of the hydraulic cylinder of the continuous casting machine, and the spray head is used to spray cooling water to the hydraulic cylinder.

[0009] In an optional embodiment, the water pipe is in the shape of a circular ring; the outer diameter of the water pipe is 20 mm, and the inner diameter of the water pipe is 15 mm.

[0010] In an optional embodiment, the distance between the water pipe and the outer surface of the hydraulic cylinder is 70 mm-90 mm.

[0011] In an optional embodiment, the spray head is a variable-diameter spray head, the spray head has a first end and a second end, the first end is connected with the water pipe, the second end is provided with a water spraying hole, the diameter of the first end is larger than the diameter of the second end, and the first end is provided with a water inlet, the caliber of the water inlet is larger than the diameter of the second end.

[0012] In an optional embodiment, the second end is provided with a plurality of water spraying holes, the plurality of water spraying holes are arranged in at least two concentric circles; the diameter of the first end is 15 mm, the diameter of the second end is 10 mm, and the caliber of the water spraying hole is 1.2 mm.

[0013] In an optional embodiment, the inner wall of the spray head is in a stepped shape from the first end to the second end.

[0014] In an optional embodiment, at the first end, the included angle between the inner wall of the spray head and a preset plane is 60°-65°, wherein the preset plane is perpendicular to the direction from the first end to the second end.

[0015] In an optional embodiment, the continuous casting machine hydraulic cooling device comprises at least two spray heads, and the at least two spray heads are arranged at intervals on the water pipe.

[0016] In an optional embodiment, the continuous casting machine hydraulic cooling device further comprises a temperature sensor, a controller and a dynamic regulating valve, the temperature sensor is arranged on the hydraulic cylinder, the dynamic regulating valve is arranged between the spray head and the water pipe, and the temperature sensor and the dynamic regulating valve are connected with the controller.

[0017] In an optional embodiment, the continuous casting machine hydraulic cooling device further comprises a cooling water recovery chassis device, the support is arranged on the cooling water recovery chassis device, and the cooling water recovery chassis device is arranged below the hydraulic cylinder and is used for recovering cooling water.

[0018] In a second aspect, the present application provides a cooling method for the continuous casting machine hydraulic cooling device of any one of the preceding embodiments, the cooling method comprising:

[0019] When the temperature of the hydraulic cylinder reaches a first preset temperature, the spray head is controlled to spray cooling water on the hydraulic cylinder;

[0020] In a first preset time, if the temperature of the hydraulic cylinder decreases to a second preset temperature, the spray head is controlled to stop spraying cooling water; otherwise, the amount of cooling water sprayed by the spray head is increased, and the spray head sprays for a second preset time;

[0021] In a second preset time, if the temperature of the hydraulic cylinder decreases to a second preset temperature, the spray head is controlled to stop spraying cooling water; otherwise, the amount of cooling water sprayed by the spray head is increased again, the casting speed of the continuous casting machine is reduced, and when the temperature of the hydraulic cylinder decreases to the second preset temperature and maintains for a set time, the casting speed of the continuous casting machine is restored.

[0022] The beneficial effects of the continuous casting machine hydraulic cooling device provided by the embodiment of the present application include: the continuous casting machine hydraulic cooling device provided by the embodiment of the present application comprises a support and a spraying mechanism, the spraying mechanism comprises a water pipe and a spray head, the spray head is arranged on the water pipe, and the water pipe is arranged on the support, wherein the water pipe is arranged around the outer periphery of the hydraulic cylinder of the continuous casting machine, and the spray head is used for spraying cooling water to the hydraulic cylinder. By arranging the spray head on the water pipe, the cooling water can be reliably sprayed on the outer surface of the hydraulic cylinder, thereby achieving good cooling effect. Moreover, the water pipe and the spray head are arranged outside the hydraulic cylinder through the support, and the structure is simple, so that the maintenance such as repair and replacement can be facilitated even if the water pipe or the spray head is damaged or fails.

[0023] The beneficial effects of the cooling method provided by the embodiment of the present application include: the cooling method provided by the embodiment of the present application can control the spray head to spray cooling water for cooling according to the temperature of the hydraulic cylinder, so that the spray head can spray appropriate cooling water for cooling according to the real-time temperature of the hydraulic cylinder, thereby improving the cooling effect, and the waste of cooling water can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0025] Figure 1 The structure sectional view of the hydraulic cylinder and the continuous casting machine hydraulic cooling device in the embodiment of the present application;

[0026] Figure 2 The structure schematic view of the spray head in the first perspective in the embodiment of the present application;

[0027] Figure 3 The structure schematic view of the spray head in the second perspective in the embodiment of the present application;

[0028] Figure 4 The structure schematic view of the hydraulic cylinder and the continuous casting machine hydraulic cooling device in the first perspective in the embodiment of the present application;

[0029] Figure 5 The structure schematic view of the hydraulic cylinder and the continuous casting machine hydraulic cooling device in the second perspective in the embodiment of the present application.

[0030] Icon: 010 - hydraulic cooling device of continuous casting machine; 100 - support; 200 - spraying mechanism; 210 - water pipe; 220 - nozzle; 221 - water inlet; 222 - water outlet; 223 - inner wall; 230 - temperature sensor; 300 - cooling water recovery chassis device; 310 - water return pipe; 400 - hydraulic cylinder. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0033] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships in which the products of the present application are usually placed, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Please refer to Figure 1The embodiment provides a hydraulic cooling device 010 of a continuous casting machine, which comprises a support 100 and a spraying mechanism 200, the spraying mechanism 200 comprises a water pipe 210 and a spray head 220, the spray head 220 is arranged on the water pipe 210, and the water pipe 210 is arranged on the support 100, wherein the water pipe 210 is arranged around the outer circumferential side of a hydraulic cylinder 400 of the continuous casting machine, and the spray head 220 is used for spraying cooling water to the hydraulic cylinder 400.

[0037] The water pipe 210 is arranged around the outer circumferential side of the continuous casting machine, so that the spray head 220 arranged on the water pipe 210 can reliably spray the cooling water on the outer surface of the hydraulic cylinder 400, and good cooling effect is achieved; moreover, the water pipe 210 and the spray head 220 are arranged outside the hydraulic cylinder 400 through the support 100, so that the structure is simple, and even if the water pipe 210 or the spray head 220 is damaged or fails, maintenance such as repair or replacement can be conveniently carried out.

[0038] The inner diameter and the outer diameter of the water pipe 210 can be selected according to requirements; in order to ensure that the water pipe 210 can provide sufficient cooling water to cool the hydraulic cylinder 400 and the cooling water is not wasted, the outer diameter of the water pipe 210 is 20 mm, and the inner diameter of the water pipe 210 is 15 mm.

[0039] Of course, in other embodiments, the outer diameter of the water pipe 210 can also be 18 mm, 19 mm or the like, and the inner diameter of the water pipe 210 can also be 13 mm, 14 mm or the like, which is not limited here.

[0040] In order to uniformly spray the cooling water on the outer surface of the hydraulic cylinder 400, the water pipe 210 is arranged in a circular ring shape. Of course, in other embodiments, the water pipe 210 can also be in a rectangular ring shape or the like, which is not limited here.

[0041] In order to improve the effect of spraying cooling and reduce the loss of cooling water, the spacing between the water pipe 210 and the outer surface of the hydraulic cylinder 400 is 70 mm-90 mm, for example, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm or the like.

[0042] If the spacing between the water pipe 210 and the surface of the hydraulic cylinder 400 is less than 70 mm, the spraying angle of the cooling water is too low, the spraying distance is short, the spraying range is small, the atomization is poor, and the cooling effect is poor.

[0043] If the spacing between the water pipe 210 and the surface of the hydraulic cylinder 400 is greater than 90 mm, although the spraying range is large and the atomization is good, the water is easy to lose, the flow is insufficient, and the cooling effect is not ideal.

[0044] In order to ensure that the cooling water sprayed from the spray head 220 can meet the pressure requirement of the hydraulic cylinder 400, please refer to Figure 2The spray head 220 of the embodiment is a variable-diameter spray head. The spray head 220 has a first end and a second end. The first end is connected to the water pipe 210, and the second end is provided with water spray holes 222. The diameter of the first end is greater than the diameter of the second end. The first end is provided with a water inlet 221, and the caliber of the water inlet 221 is greater than the diameter of the second end. In this way, the spray head 220 is roughly in the shape of a circular truncated cone, and the caliber of the water inlet 221 is greater than the diameter of the second end of the spray head 220, so that the pressure of the water entering the spray head 220 can be increased, thereby ensuring that the pressure of the cooling water sprayed from the spray head 220 is large enough to meet the requirements of the cooling hydraulic cylinder 400.

[0045] Further, the second end of the spray head 220 is provided with a plurality of water spray holes 222, and the plurality of water spray holes 222 are arranged in at least two concentric circles. The diameter of the first end is 15 mm, and the caliber of the water inlet 221 can be slightly smaller than 15 mm, for example, 14 mm, 14.5 mm, etc. The diameter of the second end is 10 mm, and the caliber of the water spray hole 222 is 1.2 mm. In this way, the pressure of the cooling water sprayed from the spray head 220 is strong, the flow is uniform, the spraying effect is good, and the cooling effect is good.

[0046] Of course, in other embodiments, the caliber of the water inlet 221 is 15 mm, and the diameter of the first end can not be limited, for example, it can be 16 mm, 20 mm, etc. As long as the caliber of the water inlet 221 is greater than the diameter of the second end of the spray head 220, the water pressure from the first end to the second end of the spray head 220 can be increased to ensure that the sprayed cooling water has a large enough pressure.

[0047] The number of water spray holes 222 can be selected as needed. Please refer to Figure 3 The number of water spray holes 222 provided in the second end of the spray head 220 of the embodiment is 11. There are 6 water spray holes 222 uniformly distributed in the outermost circle, 4 water spray holes 222 uniformly distributed in the middle circle, and 1 water spray hole 222 distributed at the center of the innermost circle. The 11 water spray holes 222 are roughly in the shape of H. In this way, the uniformity of the cooling water spraying can be ensured, and good spraying cooling effect can be ensured.

[0048] In other embodiments, the number of water spray holes 222 can also be 6, 8, 10, 15, etc., which is not limited here.

[0049] Please refer to Figure 3 From the first end to the second end of the spray head 220, the inner wall 223 of the spray head 220 is in the shape of a ladder. In the case that the water inlet 221 is large, the water spray hole 222 is small, and the plurality of water spray holes 222 are roughly in the shape of H, the inner wall 223 of the spray head 220 is set to be in the shape of a ladder, which can ensure that enough cooling water is sprayed, and the pressure of the water flow sprayed from the water spray hole 222 is large enough to achieve good cooling effect.

[0050] Further, at the first end, the inner wall 223 of the spray head 220 has an angle of 60°-65°, for example, 60°, 63° or 65°, with the preset plane a perpendicular to the direction from the first end to the second end. In the case that the distance between the water pipe 210 and the outer surface of the hydraulic cylinder 400 is 70mm-90mm, the angle of the inner wall 223 of the spray head 220 at the first end with the preset plane a is 60°-65°, which can meet the requirements of the flow and pressure of the cooling water, so that the spray water range is far enough, the atomization cooling effect is good, the cooling is uniform, and the water loss is small.

[0051] In order to ensure the efficiency of spraying and cooling, the continuous casting machine hydraulic cooling device includes at least two spray heads 220, which are arranged at intervals on the water pipe 210. In this way, at least two spray heads 220 can be used to spray cooling water at the same time, effectively improving the efficiency of cooling.

[0052] The number of spray heads 220 can be selected as needed. Please refer to Figure 4 and Figure 5 In this embodiment, the spraying mechanism 200 includes eight spray heads 220, and four spray heads 220 are uniformly and spacedly connected on each side of the water pipe 210 along the direction of the axis b of the annular water pipe 210, and the spray heads 220 on the two sides are correspondingly distributed. Of course, in other embodiments, the spray heads 220 on the two sides of the water pipe 210 can also be staggered. In this way, the cooling water can be sprayed more efficiently and uniformly to improve the efficiency and effect of cooling.

[0053] In other embodiments, the number of spray heads 220 can also be one, two, three, four, ten, etc., which is not limited here.

[0054] In other embodiments, the spray head 220 can be arranged on only one side of the water pipe 210.

[0055] It should be noted that the connection mode of the spray head 220 and the water pipe 210 can be threaded connection. In this way, the spray head 220 is easy to assemble and disassemble, thereby facilitating assembly and maintenance. Of course, in other embodiments, the connection mode of the spray head 220 and the water pipe 210 can also be clamping, welding, etc., which is not limited here.

[0056] In order to be able to reuse the cooling water sprayed out, reduce the cooling cost; please refer to Figure 4 and Figure 5 The continuous casting machine hydraulic cooling device 010 further includes a cooling water recovery chassis device 300, and the support 100 is arranged on the cooling water recovery chassis device 300, and the cooling water recovery chassis device 300 is arranged below the hydraulic cylinder 400 and is used for recovering cooling water.

[0057] The cooling water recovery chassis device 300 includes, but is not limited to, a water receiving tray, a water receiving tank, etc. arranged below the hydraulic cylinder 400.

[0058] It should be noted that the recovered cooling water can be treated by oil removal, filtration, etc. and then recycled for cooling the hydraulic cylinder 400.

[0059] Optionally, the continuous casting machine hydraulic cooling device 010 further comprises a water return pipe 310 in communication with the cooling water recovery chassis device 300 and connectable to a recovery treatment device (not shown in the figure) for guiding the cooling water collected by the cooling water recovery chassis device 300 to the recovery treatment device for filtration, oil removal, etc.

[0060] Please refer to Figure 4 and Figure 5 The continuous casting machine hydraulic cooling device 010 of the embodiment further comprises a temperature sensor 230 arranged on the hydraulic cylinder 400, a controller (not shown in the figure) and a dynamic regulating valve (not shown in the figure) arranged between the spray head 220 and the water pipe 210, and the temperature sensor 230 and the dynamic regulating valve are both connected to the controller. In this way, the temperature sensor 230 can be used to detect the temperature of the hydraulic cylinder 400 in real time, and send the corresponding detection signal to the controller, and the controller can control the dynamic regulating valve to make the spray head 220 spray different amounts of water, so as to facilitate cooling of the hydraulic cylinder 400 according to the real-time temperature of the hydraulic cylinder 400, on the one hand to ensure the cooling effect and efficiency, and on the other hand to reduce the waste of cooling water.

[0061] The controller includes, but is not limited to, a PLC control system.

[0062] Optionally, the water pipe 210 is connected to the dynamic regulating valve through a high-temperature-resistant metal hose, and the dynamic regulating valve is connected to the spray head 220; the regulating power of the dynamic regulating valve is 4-20 mA, that is, the opening of the dynamic regulating valve can be adjusted by using a current of 4-20 mA, so as to adjust the amount of cooling water sprayed by the spray head 220, for example: when a current of 4 mA is delivered to the dynamic regulating valve, the dynamic regulating valve is in the minimum opening state, and the spray head 220 sprays the minimum amount of water; when a current of 20 mA is delivered to the dynamic regulating valve, the dynamic regulating valve is in the fully open state, and the spray head 220 sprays the maximum amount of water.

[0063] The embodiment also provides a cooling method for the continuous casting machine hydraulic cooling device 010 described above, and the cooling method comprises the following steps:

[0064] S1: When the temperature of the hydraulic cylinder 400 reaches a first preset temperature, the spray head 220 sprays cooling water to the hydraulic cylinder 400.

[0065] Optionally, when the temperature sensor 230 detects that the temperature of the hydraulic cylinder 400 is greater than or equal to 55℃, a detection signal is sent to the controller, and the controller controls the dynamic adjusting valve to open the spray head 220 to spray cooling water to spray the hydraulic cylinder 400.

[0066] In this way, the hydraulic cylinder 400 can be cooled by the spray head 220 when cooling is needed, so as to reduce the waste of cooling water and cool the hydraulic cylinder 400 in time, thereby prolonging the service life of the hydraulic cylinder 400.

[0067] S2: If the temperature of the hydraulic cylinder 400 is reduced to the second preset temperature within the first preset time, the spray head 220 is controlled to stop spraying cooling water; otherwise, the amount of cooling water sprayed by the spray head 220 is increased, and the spray head 220 is sprayed for the second preset time.

[0068] Optionally, within 1 minute after the step S1 starts to spray cooling water, the temperature sensor 230 detects that the temperature of the hydraulic cylinder 400 is reduced to 40℃, so that the controller controls the dynamic adjusting valve to be closed, and the spray head 220 stops spraying cooling water to the hydraulic cylinder 400, so as to save the cooling water. If the temperature of the hydraulic cylinder 400 is not reduced to 40℃ within 1 minute to 2 minutes after the step S1 starts, the controller increases the amount of water sprayed by the spray head 220, so as to strengthen the cooling of the hydraulic cylinder 400, so that the temperature of the hydraulic cylinder 400 can be reliably reduced, and the problem that the sealing ring of the hydraulic cylinder 400 is easily damaged at high temperature is improved.

[0069] It should be noted that when the temperature of the hydraulic cylinder 400 is not reduced to 40℃ within 1 minute to 2 minutes after the step S1 starts, the controller increases the amount of water sprayed by the spray head 220, and the specific amount of increase can be obtained by looking up a table.

[0070] S3: If the temperature of the hydraulic cylinder 400 is reduced to the second preset temperature within the second preset time, the spray head 220 is controlled to stop spraying cooling water; otherwise, the amount of cooling water sprayed by the spray head 220 is increased again, and the casting speed of the continuous casting machine is reduced, and when the temperature of the hydraulic cylinder 400 is reduced to the second preset temperature and maintained for a set time, the casting speed of the continuous casting machine is restored.

[0071] Optionally, 1-2 minutes after the amount of cooling water sprayed in step S2 is increased, i.e. 2-3 minutes after the spraying starts, if the temperature sensor 230 detects that the temperature of the hydraulic cylinder 400 decreases to 40℃, the dynamic adjusting valve is controlled by the controller to be closed, and the spray head 220 no longer sprays cooling water on the hydraulic cylinder 400, so as to save the cooling water. If the temperature sensor 230 detects that the temperature of the hydraulic cylinder 400 is still greater than 40℃, the dynamic adjusting valve is controlled by the controller to be opened to the maximum water flow, so that the spray head 220 sprays a large amount of cooling water, and the casting speed of the continuous casting machine can be reduced by 0.5 m / min, so as to avoid that the temperature of the cast slab is too high, and the hydraulic cylinder 400 is kept at a high temperature for a long time, i.e. it is beneficial to the cooling of the hydraulic cylinder 400.

[0072] When the temperature sensor 230 detects that the temperature of the hydraulic cylinder 400 decreases to less than or equal to 40℃ and is maintained for 2 minutes, the casting speed of the continuous casting machine can be restored, and the cooling is stopped.

[0073] The cooling method of the embodiment can reduce the temperature of the hydraulic cylinder 400 to 40℃ within 3 minutes, and further prolong the service life of the hydraulic cylinder 400.

[0074] It should be noted that, in order to make the cooling water sprayed by the spray head 220 more meet the cooling demand and not waste the cooling water, in the production process, different levels of metal heat conduction coefficients can be introduced into the controller according to the steel grade, so as to control different amounts of sprayed water according to different steel grades.

[0075] Optionally, for plain carbon steel such as threaded steel (30%), the faster the temperature heat transfer, the metal heat conduction coefficient is 1; for medium carbon steel such as wire drawing steel, the alloy composition is moderate (45%-65%), the density of the cast slab is high, the heat storage is large, and the heat loss is small, and the metal heat conduction coefficient is 1.3; for high-grade building steel, the alloy composition is moderate (≧70%), the density of the cast slab is higher, the heat storage is larger, and the metal heat conduction coefficient is 1.5; the greater the metal heat conduction coefficient, the more cooling water is needed, i.e. the spray head 220 sprays more cooling water by controlling the dynamic adjusting valve by the controller.

[0076] In the production process, the water flow coefficient can also be determined according to the actual temperature of the hydraulic cylinder 400, and the dynamic adjusting valve is controlled by the controller to make the spray head 220 spray different amounts of water; wherein the hydraulic cylinder 400 starts to spray water when the temperature is higher than 55℃ and above, and the water flow coefficient is 1; when the temperature of the hydraulic cylinder 400 is higher than 75℃ and above, the water flow coefficient increases to 1.7. When the temperature of the hydraulic cylinder 400 is higher than 95℃ and above, the water flow coefficient increases to 2.1; the higher the temperature of the hydraulic cylinder 400 when the cooling starts, the more water the spray head 220 sprays.

[0077] In the production process, the casting blank temperature coefficient can also be determined according to different casting speeds of the continuous casting machine, and the dynamic adjusting valve is controlled according to the casting blank temperature coefficient to make the nozzle 220 spray different amounts of water; wherein, the position 30 meters away from the cooling bed is defined as a standard position, the standard temperature is 1000 DEG C, the casting speed is 1.8 m / min-2.2 m / min, the temperature reaching the cooling bed is about 500 DEG C, and the casting blank temperature coefficient is 1; when the casting speed is 2.2 m / min-2.5 m / min, the temperature reaching the cooling bed is about 650 DEG C, and the casting blank temperature coefficient is 1.2; when the casting speed is 2.5 m / min-2.9 m / min, the temperature reaching the cooling bed is about 750 DEG C, and the casting blank temperature coefficient is 1.5; when the casting speed is 2.9 m / min-3.3 m / min, the temperature reaching the cooling bed is about 830 DEG C, and the casting blank temperature coefficient is 1.7; the greater the casting speed, the greater the casting blank temperature coefficient, and the controller controls the dynamic adjusting valve to make the nozzle 220 spray more cooling water.

[0078] In the production process, the heavier the weight of a single casting blank, the slower the temperature dissipation, and the greater the cooling strength is needed, so the controller controls the dynamic adjusting valve to make the nozzle 220 spray more cooling water to cool in time.

[0079] It should be noted that the spraying amount of the cooling water can be calculated according to the metal heat conduction coefficient, the water flow coefficient, and the casting blank temperature coefficient through a table or a formula stored in the controller, and is not specifically limited here.

[0080] The continuous casting machine hydraulic cooling device 010 of the embodiment can control the nozzle 220 to spray a corresponding amount of cooling water according to the temperature of the surface of the hydraulic cylinder 400 and the like, so as to cool the hydraulic cylinder 400 in time and efficiently, and is beneficial to reducing the waste of cooling water.

[0081] In summary, the continuous casting machine hydraulic cooling device 010 and the cooling method of the application can improve the cooling effect, and the structure of the cooling device is simple and convenient to maintain when faults or damages occur.

[0082] The above is only a preferred embodiment of the application and is not used to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A hydraulic cooling device for a continuous caster, characterized by, The application relates to a continuous casting machine hydraulic cooling device. The device comprises a support, a spraying mechanism, wherein the spraying mechanism comprises a water pipe and a nozzle, the nozzle is arranged on the water pipe, the water pipe is arranged on the support, the water pipe is arranged around the outer circumferential side of a hydraulic cylinder of a continuous casting machine, and the nozzle is used for spraying cooling water to the hydraulic cylinder. The nozzle is a variable-diameter nozzle, the nozzle has a first end and a second end, the first end is connected with the water pipe, the second end is provided with water spraying holes, the diameter of the first end is larger than that of the second end, the first end is provided with a water inlet, and the diameter of the water inlet is larger than the diameter of the second end. The second end is provided with a plurality of water spraying holes, the water spraying holes are arranged in at least two concentric circles and in an H-shaped mode. The inner wall of the nozzle is in a stepped mode from the first end to the second end. At the first end, the included angle between the inner wall of the nozzle and a preset plane is 60-65 degrees, and the preset plane is perpendicular to the direction from the first end to the second end. The water pipe is in a circular ring mode, the outer diameter of the water pipe is 20 mm, and the inner diameter of the water pipe is 15 mm.

2. The hydraulic cooling device for a continuous caster according to claim 1, characterized by The distance between the water pipe and the outer surface of the hydraulic cylinder is 70-90 mm.

3. The hydraulic cooling device for a continuous caster according to claim 1, characterized by The diameter of the first end is 15 mm, the diameter of the second end is 10 mm, and the diameter of the water spraying hole is 1.2 mm.

4. The hydraulic cooling device for a continuous caster according to claim 1, wherein The continuous casting machine hydraulic cooling device comprises at least two nozzles, and the nozzles are arranged at intervals on the water pipe.

5. The hydraulic cooling device for a continuous caster according to claim 1, wherein The continuous casting machine hydraulic cooling device further comprises a temperature sensor, a controller and a dynamic adjusting valve, the temperature sensor is arranged on the hydraulic cylinder, the dynamic adjusting valve is arranged between the nozzle and the water pipe, and the temperature sensor and the dynamic adjusting valve are connected with the controller.

6. The hydraulic cooling device for a continuous caster according to claim 1, wherein The continuous casting machine hydraulic cooling device further comprises a cooling water recovery chassis device, the support is arranged on the cooling water recovery chassis device, and the cooling water recovery chassis device is arranged below the hydraulic cylinder and is used for recovering cooling water.

7. The hydraulic cooling device for a continuous caster according to claim 1, wherein The cooling method for the continuous casting machine hydraulic cooling device comprises the following steps:

8. A cooling method characterized by, When the temperature of the hydraulic cylinder reaches a first preset temperature, the nozzle is controlled to spray cooling water to the hydraulic cylinder; In a first preset time, if the temperature of the hydraulic cylinder is reduced to a second preset temperature, the nozzle is controlled to stop spraying cooling water; otherwise, the amount of cooling water sprayed by the nozzle is increased, and the nozzle is sprayed for a second preset time; In the second preset time, if the temperature of the hydraulic cylinder is reduced to the second preset temperature, the nozzle is controlled to stop spraying cooling water; otherwise, the amount of cooling water sprayed by the nozzle is increased again, the casting speed of the continuous casting machine is reduced, and when the temperature of the hydraulic cylinder is reduced to the second preset temperature and maintained for a set time, the casting speed of the continuous casting machine is restored. ​

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