Water-cooling roller system for strip steel and cooling method of water-cooling roller system

Abstract

The invention provides a water-cooling roller system for strip steel and a cooling method of the water-cooling roller system, and belongs to the field of metallurgical manufacturing. The water-cooling roller system for the strip steel comprises a water inlet module, a water return module, a control module and a water-cooling roller, and the control module is electrically connected with the water inlet module and the water return module so as to control a cooling medium to flow into and out of the water-cooling roller; the water cooling roller comprises a roller, a water inlet cavity and a water return cavity are formed in the roller in the length direction of the roller, the water inlet cavity communicates with the water inlet module, and a nozzle is arranged on the side, close to the circumferential side wall of the roller, of the water inlet cavity. The nozzles are arranged in the length direction of the water inlet cavity and spray the cooling medium in the water inlet cavity to the inner side wall in the circumferential direction of the roller, the cooling medium flows into the water return cavity along the inner side wall in the circumferential direction of the roller, and the water return cavity is communicated with the water return module. The device is beneficial for ensuring the temperature consistency in the length direction of the water-cooling roller, and is beneficial for improving the production quality of strip steel.

Description

Technical Field

[0001] The invention relates to the field of metallurgical manufacturing, and in particular to a water-cooled roller system for strip steel and a cooling method thereof. Background Art

[0002] During the production process, the strip steel needs to be quickly cooled after fine rolling in order to control the strip steel temperature, improve the organizational structure and enhance the mechanical properties. In actual production, water-cooled rollers are often used to cool the strip steel by heat exchange. The water-cooled rollers are provided with cooling water channels inside. The cooling water flowing in the cooling water channels reduces the temperature of the water-cooled rollers, and then the strip steel undergoes heat exchange during contact with the water-cooled rollers to reduce its temperature, thereby achieving the purpose of rapidly cooling the strip steel.

[0003] In the prior art, the cooling water channel of the water-cooled roller mostly adopts a spiral channel and an axial channel, and the cooling water channel has water inlet at one end and water outlet at the other end. Such a setting makes the temperature of the water-cooled roller at the water-inlet end lower than the temperature of the water-outlet end, that is, there is a temperature difference between the two ends of the water-cooled roller, resulting in inconsistent cooling temperature in the width direction of the strip, which directly affects the processing quality of the strip.

[0004] Therefore, a new solution is needed to solve the above technical problems. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a water-cooled roller system for strip steel and a cooling method thereof, so as to solve the problem of uneven temperature of the water-cooled roller in the length direction in the prior art.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides a water-cooled roller system for strip steel, which is specifically configured as follows: it includes a water inlet module, a water return module, a control module and a water-cooled roller, wherein the water inlet module and the water return module are both electrically connected to the control module, the water-cooled roller includes a roller, the interior of the roller is provided with a water inlet chamber and a water return chamber along its own length direction, the water inlet chamber is communicated with the water inlet module, and a nozzle is provided on the side of the water inlet chamber close to the circumferential side wall of the roller, the nozzle is arranged along the length direction of the water inlet chamber and sprays the cooling medium in the water inlet chamber onto the circumferential inner wall of the roller, the cooling medium flows into the water return chamber along the circumferential inner wall of the roller, and the water return chamber is communicated with the water return module; the control module controls the water inlet module to flow the cooling medium into the water inlet chamber and spray it on the circumferential inner wall of the roller, and the cooling medium flowing into the water return chamber flows out of the water-cooled roller through the water return module.

[0007] Optionally, the injection port of the nozzle is configured as a slit, and the slit runs through the water inlet cavity along a length direction.

[0008] Optionally, the gap of the slit is set to 0.5-2.5 mm, and the minimum distance between the injection port and the circumferential inner wall of the roller is set to 6-8 times the gap of the slit.

[0009] Optionally, the injection port of the nozzle is configured as a plurality of spray holes uniformly distributed in sequence along the length direction of the water inlet chamber, the diameter of the spray holes is configured to be 0.8 to 3.5 mm, and the spacing between two adjacent spray holes is configured to be 1.6 to 6 mm.

[0010] Optionally, more than one water inlet chamber and more than one water return chamber are provided, and the two are provided in a one-to-one correspondence; and the plurality of water inlet chambers and the water return chambers are evenly distributed along the circumference of the roller.

[0011] Optionally, the water-cooled roller further comprises an inner ring plate spaced apart from the circumferential side wall of the roller, a cover plate provided at both ends of the roller, and a partition plate, wherein the inner ring plate, the circumferential side wall of the roller, and the cover plate form a closed chamber, wherein a plurality of the partition plates are evenly provided in the chamber along the circumference of the roller to divide the chamber into a plurality of the water return chambers, and the water inlet chamber is embedded in the inner ring plate and communicated with the water return chamber through the nozzle.

[0012] Optionally, the wall thickness of the circumferential side wall of the roller is set to 5-20 mm.

[0013] Optionally, the water inlet module includes more than one group of water inlet branch pipes, and one group of the water inlet branch pipes is connected to one water inlet cavity; the water return module includes more than one group of water return branch pipes, and one group of the water return branch pipes is connected to one water return cavity.

[0014] Optionally, the water inlet module also includes a water inlet main pipe connected to each of the water inlet branches, a first regulating valve connected to the water inlet main pipe, a second regulating valve connected to the water inlet branch pipe, and a first pressure sensor is arranged in the water inlet chamber; the return water module also includes a return water main pipe connected to each of the return water branch pipes, a third regulating valve connected to the return water main pipe, a fourth regulating valve connected to the return water branch pipe, and a second pressure sensor is arranged in the return water chamber.

[0015] Optionally, the water-cooled roller also includes a main shaft connected to the roller, and water inlet holes and water return holes are respectively provided at both ends of the main shaft. The water inlet main pipe is connected to the water inlet branch pipe through the water inlet hole, and the water return main pipe is connected to the water return branch pipe through the water return hole.

[0016] The present invention also provides a cooling method for a water-cooled roller system, the method comprising:

[0017] Turn on the water-cooled roller system;

[0018] The cooling medium flows into the water inlet cavity of the water-cooled roller through the water inlet module, and is sprayed onto the inner side wall of the roller in the circumferential direction along the length direction of the water inlet cavity through the nozzle, so as to exchange heat between the cooling medium and the circumferential side wall of the water-cooled roller;

[0019] The cooling medium sprayed by the nozzle flows into the water return chamber, and flows out of the water return chamber through the water return module.

[0020] Optionally, the method further comprises:

[0021] Acquire a first detection value of a first pressure sensor;

[0022] According to the first detection value, adjusting the openings of the first regulating valve and the second regulating valve to maintain the first detection value at a first preset pressure value;

[0023] Acquire a second detection value of a second pressure sensor;

[0024] According to the second detection value, the openings of the third regulating valve and the fourth regulating valve are adjusted to maintain the second detection value at a second preset pressure value.

[0025] As described above, a water-cooled roller system for strip steel and a cooling method thereof of the present invention have the following beneficial effects:

[0026] By arranging a water inlet chamber and a water return chamber inside the roller of the water-cooled roller along its own length direction, the water inlet chamber is connected with the water inlet module so that the water inlet module inputs cooling medium into the water inlet chamber, and a nozzle is arranged on the side of the water inlet chamber close to the circumferential side wall of the roller, and the nozzle is arranged along the length direction of the water inlet chamber. The cooling medium entering the water inlet chamber is sprayed onto the circumferential inner wall of the roller through the nozzle, so that the circumferential inner wall of the roller in the length direction is in direct contact with the cooling medium sprayed from the nozzle, which is beneficial to improving the cooling speed of the water-cooled roller, and then to improving the heat transfer coefficient of the water-cooled roller, and is beneficial to ensuring that the temperature of the roller is consistent in the length direction without temperature difference, which is beneficial to improving the production quality of the strip; then, the cooling medium sprayed from the nozzle flows into the water return chamber, and the water return chamber is connected with the water return module so that the cooling medium in the water return chamber flows out of the water return chamber through the water return module; this reciprocating process is repeated to achieve the purpose of cooling the roller by the cooling medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shown is a schematic structural diagram of a water-cooled roller system for a steel strip according to an embodiment of the present invention;

[0028] Figure 2 Display as Figure 1 Schematic diagram of the local cross-sectional structure of AA.

[0029] Description of Reference Numerals

[0030] 1- water-cooled roller; 11- roller; 12- water inlet chamber; 13- water return chamber; 14- nozzle; 15- inner ring plate; 16- cover plate; 161- avoidance hole; 17- partition plate; 18- spindle; 181- water inlet hole; 182- water return hole;

[0031] 2-water inlet branch pipe; 21-second regulating valve;

[0032] 3-return branch pipe; 31-the fourth regulating valve. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0034] It should be noted that the diagram provided in the present embodiment only illustrates the basic concept of the present invention in a schematic manner, so the diagram only shows the components related to the present invention rather than drawing according to the number, shape and size of the components during actual implementation. The form, quantity and proportion of each component during actual implementation can be changed at will, and the component layout form may also be more complicated. The structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of narration, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0035] See also Figure 1 and Figure 2 The present invention provides a water-cooled roller system for strip steel, comprising a water inlet module, a water return module, a control module and a water-cooled roller 1, wherein the water inlet module and the water return module are both electrically connected to the control module. The water-cooled roller 1 comprises a roller 11, and a water inlet chamber 12 and a water return chamber 13 are arranged inside the roller 11 along its length direction.

[0036] The water inlet chamber 12 is connected to the water inlet module, and the control module controls the water inlet module to flow the cooling medium into the water inlet chamber 12. A nozzle 14 is provided on one side of the water inlet chamber 12 close to the circumferential side wall of the roller 11. The nozzle 14 is provided along the length direction of the water inlet chamber 12, and sprays the cooling medium in the water inlet chamber 12 on the circumferential inner side wall of the roller 11, so that the circumferential inner side wall of the roller 11 in the length direction is in direct contact with the cooling medium sprayed from the nozzle 14, which is beneficial to improving the cooling speed of the water-cooled roller 1, and further beneficial to improving the heat exchange coefficient of the water-cooled roller 1, and is beneficial to ensuring that the temperature of the roller 11 in the length direction is consistent without temperature difference, and further beneficial to improving the production quality of the strip steel.

[0037] Subsequently, the cooling medium sprayed from the nozzle 14 flows into the water return chamber 13 along the inner circumferential wall of the roller 11. The water return chamber 13 is connected to the water return module. The control module controls the water return module to make the cooling medium in the water return chamber 13 flow out of the water return chamber 13 through the water return module. This process is repeated to cool the roller 11 through the cooling medium.

[0038] Exemplarily, the cooling medium includes, but is not limited to, a cooling fluid such as cooling water.

[0039] In some embodiments, there are more than one water inlet chamber 12 and water return chamber 13, and the two are arranged one by one. The multiple water inlet chambers 12 and water return chambers 13 are evenly distributed along the circumference of the roller 11, which is conducive to ensuring that the temperature of the roller 11 is consistent everywhere around the circumference.

[0040] Exemplarily, when there is one water inlet chamber 12 and one water return chamber 13 , the water inlet chamber 12 is provided with a plurality of nozzles 14 evenly distributed along the circumference of the roller 11 to ensure that the temperature of the roller 11 is consistent at all locations along the circumference.

[0041] In some embodiments, the roller 11 has an inner ring plate 15 spaced apart from the circumferential side wall of the roller 11. The inner ring plate 15, the circumferential side wall of the roller 11, and the cover plates 16 at both ends of the roller 11 form a closed chamber. A plurality of partitions 17 are evenly arranged in the chamber along the circumference of the roller 11 to divide the chamber into a plurality of small chambers, which are the return water chambers 13. The water inlet chamber 12 is embedded in the inner ring plate 15 and communicated with the return water chamber 13 through the nozzle 14.

[0042] In one example, the partition 17 is set to be a long strip. During assembly, the partition 17 is first connected to the outer wall of the inner ring plate 15 (for example, welding or other methods can be used), and then the partition 17 installed on the inner ring plate 15 is ground (for example, a cylindrical grinder is used to grind the side of the partition 17 facing the roller 11) to ensure that the radial height of each partition 17 is consistent, which is conducive to the subsequent assembly of the roller 11. Subsequently, the roller 11 is sleeved on the outer periphery of the partition 17, and the inner wall of the roller 11 is interference-fitted with the outer periphery of each partition 17; such a setting is conducive to the use of the water-cooled roller 1, and the pressure on the outer periphery of the roller 11 can be evenly transmitted to the inner ring plate 15 through the partition 17. By bearing the pressure through the inner ring plate 15, the strength requirements of the roller 11 can be reduced, for example, the thickness of the roller 11 can be made thinner, thereby improving the cooling effect.

[0043] Exemplarily, the circumferential side wall of the roller 11 is made of heat-conducting materials, such as carbon steel, stainless steel, copper alloy, etc. Moreover, the wall thickness of the circumferential side wall of the roller 11 can be set to 5-20 mm, and is adaptively set according to actual needs. It should be noted that the thinner the wall thickness of the circumferential side wall of the roller 11 is set, the more conducive it is to improve the heat conduction of the roller 11, and thus to the cooling of the strip. When the wall thickness of the circumferential side wall of the roller 11 is set to a smaller value, such as 5 mm, the inner ring plate 15 and the partition plate 17 play a supporting role on the circumferential side wall of the roller 11, which is beneficial to improve the structural strength of the roller 11, and thus to increase the service life of the water-cooled roller 1.

[0044] In some embodiments, the injection port of the nozzle 14 is configured as a slit, which passes through the water inlet chamber 12 along the length direction, so that the cooling medium is ejected from the slit along the length direction of the roller 11 and directly contacts the circumferential inner wall of the roller 11, thereby facilitating ensuring that the temperature of the roller 11 along the length direction is consistent and no temperature difference occurs.

[0045] Exemplarily, in order to increase the effective amount of direct contact between the cooling medium ejected from the slit and the circumferential inner wall of the roller 11, the gap of the slit can be set to 0.5-2.5 mm, and the minimum spacing between the injection port and the circumferential inner wall of the roller 11 can be set to 6-8 times the gap of the slit. It should be noted that the smaller the gap size of the slit, the larger the minimum spacing between the injection port and the circumferential inner wall of the roller 11. Preferably, the gap of the slit can be set to 1.2 mm, in which case the spacing between the injection port and the circumferential inner wall of the roller 11 can be set to 7 times the gap of the slit.

[0046] In some other embodiments, the injection port of the nozzle 14 is set as a spray hole, and the spray holes are provided in multiple numbers and are uniformly distributed in sequence along the length direction of the water inlet chamber 12, and the cooling medium is sprayed out through the spray holes. The diameter of the spray hole can be set to 0.8-3.5 mm, and the spacing between two adjacent spray holes is set to 1.6-6 mm. It should be noted that the spacing between two adjacent spray holes is set according to the adaptability of the diameter of the spray hole to ensure that the circumferential inner side wall of the length direction of the roller 11 can be in direct contact with the cooling medium. Preferably, the diameter of the spray hole can be set to 1.4 mm, and the spacing between two adjacent spray holes is set to 2.2 mm.

[0047] In some embodiments, the water inlet module includes more than one group of water inlet branch pipes 2 , and one group of water inlet branch pipes 2 is connected to one water inlet cavity 12 , that is, one water inlet cavity 12 inputs cooling medium therein through one group of water inlet branch pipes 2 .

[0048] The water return module includes more than one group of water return branch pipes 3 , and one group of water return branch pipes 3 is connected to one water return chamber 13 , that is, the cooling medium in one water return chamber 13 is output through one group of water return branch pipes 3 .

[0049] For example, a group of water inlet branch pipes 2 may be provided with 1, 2, 3, etc. water inlet branch pipes 2, and the number of water inlet branch pipes 2 is set according to actual needs. In this embodiment, a group of water inlet branch pipes 2 is provided with 1 water inlet branch pipe 2, and the water inlet branch pipe 2 is connected to the middle of the length direction of the water inlet cavity 12. When a group of water inlet branch pipes 2 is provided with multiple water inlet branch pipes 2, the multiple water inlet branch pipes 2 are distributed in sequence along the length direction of the water inlet cavity 12.

[0050] A group of water return branch pipes 3 can be provided with 1, 2, 3, etc. water return branch pipes 3, and the number of water return branch pipes 3 is set according to actual needs. In this embodiment, a group of water return branch pipes 3 is provided with 2 water return branch pipes 3, and the 2 water return branch pipes 3 are respectively connected to the two ends of the length direction of the water return chamber 13, which is conducive to improving the reflux speed of the cooling medium and facilitating the control module to regulate the cooling temperature of the roller 11.

[0051] In some embodiments, the water inlet module further includes a water inlet main pipe, a first regulating valve and a second regulating valve 21. The water inlet main pipe is connected to all water inlet branches 2. The first regulating valve is connected to the water inlet main pipe for regulating the pressure inside the water inlet main pipe. The second regulating valve 21 is connected to the water inlet branch pipe 2 for regulating the pressure inside the water inlet branch pipe 2. A first pressure sensor is provided in the water inlet chamber 12 for detecting the pressure value inside the water inlet chamber 12. The control module adjusts the pressure inside the water inlet main pipe and the water inlet branch pipe 2 by adjusting the valve opening of the first regulating valve and the second regulating valve 21, so as to achieve the purpose of regulating the flow rate of the cooling medium flowing into the water inlet chamber 12, so that the pressure value inside the water inlet chamber 12 that can be detected by the first pressure sensor is maintained at the first preset pressure value, so that the pressure values ​​inside each water inlet chamber 12 are consistent, thereby ensuring that the temperature of each part of the roller 11 is consistent. The first preset pressure value is adaptively set according to the preset cooling temperature of the current water-cooled roller 1.

[0052] The return water module also includes a return water main pipe, a third regulating valve and a fourth regulating valve 31. Among them, the return water main pipe is connected to all the return water branches 3. The third regulating valve is connected to the return water main pipe for regulating the pressure inside the return water main pipe. The fourth regulating valve 31 is connected to the return water branch pipe 3 for regulating the pressure inside the return water branch pipe 3. A second pressure sensor is provided in the return water chamber 13 for detecting the pressure value in the return water chamber 13. The control module adjusts the pressure inside the return water main pipe and the return water branch pipe 3 by adjusting the valve opening of the third regulating valve and the fourth regulating valve 31, so as to achieve the purpose of regulating the flow rate of the cooling medium flowing out of the return water chamber 13, so that the pressure value in the return water chamber 13 that can be detected by the second pressure sensor is maintained at the second preset pressure value. In this embodiment, the second preset pressure value is set to zero to prevent the pressure value in the return water chamber 13 from affecting the regulation of the pressure value in the water inlet chamber 12.

[0053] It should be noted that each water inlet branch pipe 2 is provided with a second regulating valve 21 , and each water return branch pipe 3 is provided with a fourth regulating valve 31 .

[0054] In some embodiments, the water-cooled roller 1 further comprises a main shaft 18 connected to the roller 11, and a water inlet hole 181 and a water return hole 182 are respectively provided at both ends of the main shaft 18. In order to prevent the pipeline for conveying the cooling medium from getting entangled during the rotation of the water-cooled roller 1, the water inlet main pipe is connected to the water inlet branch pipe 2 through the water inlet hole 181, and the water return main pipe is connected to the water return branch pipe 3 through the water return hole 182.

[0055] In one example, both ends of the roller 11 are provided with avoidance holes 161, through which the water inlet branch pipe 2 and the water return branch pipe 3 extend into and / or out of the roller 11. The avoidance holes 161 can be provided on the cover plate 16 at the end of the roller 11.

[0056] In summary, the present invention provides a water-cooled roller system for strip steel, by arranging a water inlet chamber and a water return chamber inside the roller of the water-cooled roller along its own length direction, the water inlet chamber is connected with a water inlet module, so that the water inlet module inputs cooling medium into the water inlet chamber, and a nozzle is arranged on the side of the water inlet chamber close to the circumferential side wall of the roller, the nozzle is arranged along the length direction of the water inlet chamber, and the cooling medium entering the water inlet chamber is sprayed on the circumferential inner wall of the roller through the nozzle, so that the circumferential inner wall of the roller in the length direction is in direct contact with the cooling medium sprayed from the nozzle, which is beneficial to improving the cooling speed of the water-cooled roller, and further beneficial to improving the heat transfer coefficient of the water-cooled roller, and is beneficial to ensuring that the temperature of the roller is consistent in the length direction without temperature difference, and is beneficial to improving the production quality of the strip steel; then, the cooling medium sprayed from the nozzle flows into the water return chamber, and the water return chamber is connected with the water return module, so that the cooling medium in the water return chamber flows out of the water return chamber through the water return module; this reciprocating process is repeated to achieve the purpose of cooling the roller by the cooling medium.

[0057] The present invention also provides a cooling method for a water-cooled roller system, which may include steps S110 to S130, which are described in detail as follows:

[0058] Step S110, start the water-cooling roller system.

[0059] In some embodiments, the water-cooled roller system is powered on, so that the electrical components in the water inlet module, the water return module and the control module of the water-cooled roller system are powered on, and the normal working mode is started.

[0060] In step S120 , the cooling medium flows into the water inlet chamber 12 of the water-cooled roller 1 through the water inlet module, and is sprayed onto the circumferential inner wall of the roller 11 along the length direction of the water inlet chamber 12 through the nozzle 14 to exchange heat between the cooling medium and the circumferential side wall of the water-cooled roller 1 .

[0061] In some embodiments, the control module opens the first regulating valve and the second regulating valve 21, so that the water inlet main pipe and the water inlet branch pipe 2 of the water inlet module form a passage, and the cooling medium flows into each water inlet cavity 12 through the water inlet main pipe and the water inlet branch pipe 2. Subsequently, the cooling medium entering the water inlet cavity 12 is sprayed on the inner side wall of the roller 11 in the circumferential direction along the length direction of the water inlet cavity 12 through the nozzle 14. After the cooling medium contacts the inner side wall of the roller 11 in the circumferential direction, heat exchange occurs between the two, thereby achieving the purpose of cooling the roller 11.

[0062] In some embodiments, after the cooling medium enters the water inlet chamber 12, the first pressure sensor located in the water inlet chamber 12 detects the water pressure in the water inlet chamber 12, and the first pressure sensor sends the detected first detection value to the control module. The control module adjusts the opening of the first regulating valve and the second regulating valve 21 according to the first detection value to adjust the flow rate of the cooling medium input into the water inlet chamber 12 by the water inlet branch pipe 2, so that the pressure value in the water inlet chamber 12 is maintained at the first preset pressure value, thereby adjusting the cooling temperature of the roller 11, and further adjusting the cooling speed of the strip in contact with the roller 11.

[0063] It should be noted that the first preset pressure value in the water inlet chamber 12 is adaptively set according to the preset cooling temperature of the current water-cooled roller 1 .

[0064] In step S130 , the cooling medium sprayed by the nozzle 14 flows into the water return chamber 13 , and flows out of the water return chamber 13 through the water return module.

[0065] In some embodiments, the control module opens the third regulating valve and the fourth regulating valve 31 while opening the first regulating valve and the second regulating valve 21, so that the return water branch pipe 3 of the return water module and the return water main pipe form a passage. Since the return water chamber 13 is connected with the water inlet chamber 12 through the nozzle 14, the cooling medium sprayed by the nozzle 14 contacts the inner side wall of the roller 11 in the circumferential direction and flows into the return water chamber 13, and then flows out of the return water chamber 13 through the return water branch pipe 3 of the return water module and the return water main pipe.

[0066] In some embodiments, after the cooling medium enters the water return chamber 13, the second pressure sensor located in the water return chamber 13 detects the water pressure in the water inlet chamber 12, and the second pressure sensor sends the detected second detection value to the control module. The control module adjusts the opening of the third regulating valve and the fourth regulating valve 31 according to the second detection value to adjust the flow of the cooling medium in the water return branch pipe 3 and the water return main pipe, so that the pressure value in the water return chamber 13 is maintained at the second preset pressure value, which is conducive to adjusting the cooling temperature of the roller 11.

[0067] Exemplarily, the second preset pressure value in the water return chamber 13 may be set to zero to prevent the pressure value in the water return chamber 13 from affecting the regulation of the pressure value in the water inlet chamber 12 .

[0068] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A water-cooled roller system for strip steel, characterized in that: include: Water inlet module; Return water module; A water-cooled roller comprises a roller, wherein a water inlet chamber and a water return chamber are arranged inside the roller along its length direction, the water inlet chamber is communicated with the water inlet module, and a nozzle is arranged on the side of the water inlet chamber close to the circumferential side wall of the roller, the nozzle is arranged along the length direction of the water inlet chamber and sprays the cooling medium in the water inlet chamber onto the circumferential inner wall of the roller, the cooling medium flows into the water return chamber along the circumferential inner wall of the roller, and the water return chamber is communicated with the water return module; a control module is electrically connected to the water inlet module and the water return module to control the water inlet module to make the cooling medium flow into the water inlet chamber and spray it onto the circumferential inner wall of the roller, and the cooling medium flowing into the water return chamber flows out of the water-cooled roller through the water return module.

2. The water-cooled roller system for strip steel according to claim 1, characterized in that: The injection port of the nozzle is arranged as a slit, and the slit runs through along the length direction of the water inlet cavity.

3. The water-cooled roller system for strip steel according to claim 2, characterized in that: The gap of the slit is set to 0.5-2.5 mm, and the minimum distance between the injection port and the inner circumferential wall of the roller is set to 6-8 times the gap of the slit.

4. The water-cooled roller system for strip steel according to claim 1, characterized in that: The injection port of the nozzle is configured as a plurality of spray holes uniformly distributed in sequence along the length direction of the water inlet cavity, the diameter of the spray holes is configured to be 0.8 to 3.5 mm, and the spacing between two adjacent spray holes is configured to be 1.6 to 6 mm.

5. The water-cooled roller system for strip steel according to any one of claims 1 to 4, characterized in that: There are more than one water inlet cavity and more than one water return cavity, and the two are arranged in a one-to-one correspondence; the plurality of water inlet cavities and the water return cavities are evenly distributed along the circumference of the roller.

6. The water-cooled roller system for strip steel according to claim 5, characterized in that: The water-cooled roller also includes an inner ring plate spaced apart from the circumferential side wall of the roller, a cover plate arranged at both ends of the roller, and a partition plate. The inner ring plate, the circumferential side wall of the roller, and the cover plate form a closed chamber. A plurality of partition plates are evenly arranged in the chamber along the circumference of the roller to divide the chamber into a plurality of return water chambers. The water inlet chamber is embedded in the inner ring plate and is connected to the return water chamber through the nozzle.

7. The water-cooled roller system for strip steel according to claim 6, characterized in that: The wall thickness of the circumferential side wall of the roller is set to 5-20mm.

8. The water-cooled roller system for strip steel according to claim 6, characterized in that: The water inlet module includes more than one group of water inlet branch pipes, and one group of the water inlet branch pipes is connected to one water inlet cavity; the water return module includes more than one group of water return branch pipes, and one group of the water return branch pipes is connected to one water return cavity.

9. The water-cooled roller system for strip steel according to claim 8, characterized in that: The water inlet module also includes a water inlet main pipe connected to each of the water inlet branches, a first regulating valve connected to the water inlet main pipe, a second regulating valve connected to the water inlet branch pipe, and a first pressure sensor is arranged in the water inlet chamber; the return water module also includes a return water main pipe connected to each of the return water branch pipes, a third regulating valve connected to the return water main pipe, a fourth regulating valve connected to the return water branch pipe, and a second pressure sensor is arranged in the return water chamber.

10. The water-cooled roller system for strip steel according to claim 9, characterized in that: The water-cooled roller also includes a main shaft connected to the roller, and water inlet holes and water return holes are respectively provided at both ends of the main shaft. The water inlet main pipe is connected to the water inlet branch pipe through the water inlet hole, and the water return main pipe is connected to the water return branch pipe through the water return hole.

11. A cooling method for a water-cooled roller system, characterized in that: The method comprises: Turn on the water-cooled roller system; The cooling medium flows into the water inlet cavity of the water-cooled roller through the water inlet module, and is sprayed onto the inner side wall of the roller in the circumferential direction along the length direction of the water inlet cavity through the nozzle, so as to exchange heat between the cooling medium and the circumferential side wall of the water-cooled roller; The cooling medium sprayed by the nozzle flows into the water return chamber, and flows out of the water return chamber through the water return module.

12. The cooling method of the water-cooled roller system according to claim 11, characterized in that: The method further comprises: Acquire a first detection value of a first pressure sensor; According to the first detection value, adjusting the openings of the first regulating valve and the second regulating valve to maintain the first detection value at a first preset pressure value; Acquire a second detection value of a second pressure sensor; According to the second detection value, the openings of the third regulating valve and the fourth regulating valve are adjusted to maintain the second detection value at a second preset pressure value.

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