Roller cooling system and method for rolling mill

Abstract

The invention provides a roller cooling system and method for a rolling mill, the roller cooling system for the rolling mill comprises the rolling mill, the rolling mill comprises a roller, and the roller cooling system further comprises a cooling water pipe, a cooling water spray head, a cooling water electromagnetic valve, a cooling water control module and a current detection sensor; the invention further discloses a roller cooling method for the rolling mill, and the roller cooling method is applied to the roller cooling system for the rolling mill and is executed by the cooling water control module in the roller cooling system for the rolling mill. Damage to the rolling mill due to the fact that the cooling water electromagnetic valve is not opened in time is avoided, and waste of cooling water due to the fact that the cooling water electromagnetic valve is not closed in time is avoided.

Description

Technical Field

[0001] This invention relates to the field of automated cooling technology for rolling mill rolls, and more particularly to a cooling system and method for rolling mill rolls. Background Technology

[0002] Currently, roll cooling devices are commonly used to cool the rolls. Existing roll cooling devices include a cooling water storage tank, cooling water nozzles, cooling water pipes, and a cooling water solenoid valve. The cooling water storage tank stores cooling water, and the output end of the cooling water nozzles faces the rolls. The output end of the cooling water storage tank and the input end of the cooling water nozzles are connected to the input and output ends of the cooling water pipes, respectively. The cooling water solenoid valve is installed on the cooling water pipes. When the mill is in the rolling state, the cooling water solenoid valve is opened, and the cooling water in the coolant storage tank flows into the cooling water nozzles through the cooling water pipes. At this time, the cooling water is sprayed onto the rolls through the cooling water nozzles to cool them. When the mill is not in the rolling state, the cooling water solenoid valve is closed, and the cooling water in the coolant storage tank cannot flow into the cooling water nozzles through the cooling water pipes. At this time, the cooling water cannot be sprayed onto the rolls through the cooling water nozzles, and the cooling of the rolls stops.

[0003] In existing roll cooling devices, the cooling water solenoid valves often fail to open or close in a timely manner. If the cooling water solenoid valve is not opened in time when the mill is in the rolling state, it will cause damage to the mill and affect production. If the cooling water solenoid valve is not closed in time when the mill is not in the rolling state, it will cause waste of cooling water. Summary of the Invention

[0004] In response to the aforementioned technical problems, a rolling mill roll cooling system and method are provided.

[0005] The technical means employed in this invention are as follows: In a first aspect, a rolling mill roll cooling system includes a rolling mill, the rolling mill including rolls, and further including a cooling water pipe, a cooling water nozzle, a cooling water solenoid valve, a cooling water control module, and a current detection sensor; the cooling water pipe can transport cooling water from its input end to its output end; the input end of the cooling water nozzle is connected to the output end of the cooling water pipe; the cooling water solenoid valve is installed on the input end of the cooling water pipe; the signal output end of the cooling water control module is connected to the signal input end of the cooling water solenoid valve; the signal output end of the current detection sensor is connected to the signal input end of the cooling water control module; the signal input end of the current detection sensor is connected to the signal output end of the rolling mill; the output end of the cooling water nozzle faces the rolls.

[0006] Furthermore, the cooling water pipe includes a cooling water output section and a cooling water input section; the cooling water output section is a cylindrical structure with one end closed and the other end open, the axis of the cooling water output section is an arc-shaped structure, and several cooling water outlets are evenly distributed and opened along its length on the inner sidewall of the cooling water output section; the cooling water input section is a cylindrical structure with both ends open; the open end of the cooling water output section is connected to one end of the cooling water input section; the cooling water output section is coaxially sleeved outside the roll, the cooling water outlet is the output end of the cooling water pipe, and the end of the cooling water input section away from the cooling water output section is the input end of the cooling water pipe.

[0007] Furthermore, it also includes a cooling water storage mechanism; the cooling water storage mechanism includes a cooling water storage tank and a cooling water pump; the cooling water pump is installed on the output end of the cooling water storage tank; the output end of the cooling water storage tank is connected to the input end of the cooling water pipe, and the signal input end of the cooling water pump is connected to the signal output end of the cooling water control module.

[0008] In a second aspect, a method for cooling rolling mill rolls, applied to the rolling mill roll cooling system described in any one of the first aspects, is executed by a cooling water control module in the rolling mill roll cooling system, and includes the following steps: S1: Receive the real-time current value of the mill measured by the current detection sensor, and calculate the difference between the real-time current value of the mill and the idle current value of the mill. S2: If the difference between the real-time current value and the idle current value of the mill is greater than the set current value difference, the cooling water solenoid valve and cooling water pump will be turned on; otherwise, the cooling water solenoid valve and cooling water pump will be turned off.

[0009] Furthermore, the idle current value of the rolling mill is the current value of the rolling mill in the non-rolling state, which is measured by the current detection sensor in the rolling mill roll cooling system and stored in the cooling water control module of the rolling mill roll cooling system.

[0010] Compared with the prior art, the present invention has the following advantages: 1. In this invention, a current detection sensor first measures the current value of the rolling mill in its non-rolling state (i.e., the idle current value of the rolling mill) and stores the idle current value of the rolling mill in the cooling water control module. Then, the current detection sensor measures the real-time current value of the rolling mill. Since the current value of the rolling mill in the rolling state is greater than the current value of the rolling mill in the non-rolling state, if the difference between the real-time current value of the rolling mill and the idle current value of the rolling mill is greater than the set current value difference, it indicates that the rolling mill is in the rolling state. The cooling water control module controls the cooling water solenoid valve and the cooling water pump to open. Cooling water is sprayed onto the rolls through cooling water nozzles to cool them in a timely manner. If the difference between the real-time current value and the idle current value of the mill is less than or equal to the set current value difference, it means that the mill is in a non-rolling state. The cooling water control module controls the cooling water solenoid valve and cooling water pump to close, so the cooling water will not be sprayed onto the rolls through the cooling water nozzles, thus stopping the cooling of the rolls in time. This invention will not cause damage to the mill due to the failure to open the cooling water solenoid valve in time, nor will it waste cooling water due to the failure to close the cooling water solenoid valve in time.

[0011] 2. In this invention, the axis of the cooling water output section is an arc-shaped structure. Several cooling water outlets are evenly distributed along the length direction on the inner side wall of the cooling water output section. The cooling water output section is coaxially sleeved outside the roll, so that several cooling water outlets are evenly distributed along the circumferential direction of the roll and surround the roll, thereby enabling the cooling water nozzles to uniformly cool the roll.

[0012] 3. In this invention, cooling water is first stored in a cooling water storage tank. When the roll is in the rolling state, the cooling water control module controls the cooling water pump to turn on, and the cooling water will flow into the cooling water pipe through the output end of the cooling water storage tank. When the roll is not in the rolling state, the cooling water control module controls the cooling water pump to turn off, and the cooling water will not flow into the cooling water pipe through the output end of the cooling water storage tank. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is an overall structural diagram of a rolling mill roll cooling system according to Embodiment 1 of the present invention; Figure 2 This is an overall structural diagram of the rolling mill in Embodiment 1 of the present invention; Figure 3 This is an overall structural diagram of the cooling water pipe and cooling water nozzle in Embodiment 1 of the present invention; Figure 4 This is an overall flow chart of a rolling mill roll cooling method according to Embodiment 2 of the present invention; In the diagram: 1-rolling mill; 2-roll; 3-cooling water pipe; 4-cooling water nozzle; 301-cooling water output section; 302-cooling water input section. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0018] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0019] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0020] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0021] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0022] Example 1: like Figures 1 to 3 As shown, a rolling mill roll cooling system includes a rolling mill 1, which includes rolls 2, a cooling water pipe 3, a cooling water nozzle 4, a cooling water solenoid valve, a cooling water control module, and a current detection sensor. The cooling water pipe 3 can transport cooling water from its input end to its output end. The input end of the cooling water nozzle 4 is connected to the output end of the cooling water pipe 3. The cooling water solenoid valve is installed on the input end of the cooling water pipe 3. The signal output end of the cooling water control module is connected to the signal input end of the cooling water solenoid valve. The signal output end of the current detection sensor is connected to the signal input end of the cooling water control module. The signal input end of the current detection sensor is connected to the signal output end of the rolling mill 1. The output end of the cooling water nozzle 4 faces the rolls 2.

[0023] Specifically, the rolling mill roll cooling system provided in this embodiment may include several rolling mills 1. At this time, several cooling water pipes 3, cooling water nozzles 4, cooling water solenoid valves and current detection sensors are provided. The number of cooling water pipes 3, cooling water nozzles 4, cooling water solenoid valves and current detection sensors are consistent with the number of rolling mills 1 and correspond one-to-one, so that the rolling mill roll cooling system provided in this embodiment can cool the rolls 2 of multiple rolling mills 1.

[0024] In this embodiment, the cooling water pipe 3 includes a cooling water output section 301 and a cooling water input section 302. The cooling water output section 301 is a cylindrical structure with one end closed and the other end open. The axis of the cooling water output section 301 is an arc-shaped structure. Several cooling water outlets are evenly distributed and opened along the length direction on the inner side wall of the cooling water output section 301. The cooling water input section 302 is a cylindrical structure with both ends open. The open end of the cooling water output section 301 is connected to one end of the cooling water input section 302. The cooling water output section 301 is coaxially sleeved outside the roll 2. The cooling water outlet is the output end of the cooling water pipe 3, and the end of the cooling water input section 302 away from the cooling water output section 301 is the input end of the cooling water pipe 3.

[0025] Specifically, the central angle of the cooling water output section 301 is 33°, there are five cooling water outlets, the included angle between the axes of any two adjacent cooling water outlets is 7°, there are five cooling water nozzles 4, and the input ends of the cooling water nozzles 4 are connected to the cooling water outlets one by one.

[0026] In this embodiment, a cooling water storage mechanism is also included; the cooling water storage mechanism includes a cooling water storage tank and a cooling water pump; the cooling water pump is installed on the output end of the cooling water storage tank; the output end of the cooling water storage tank is connected to the input end of the cooling water pipe 3, and the signal input end of the cooling water pump is connected to the signal output end of the cooling water control module.

[0027] Example 2: like Figure 4 As shown, a method for cooling rolling mill rolls, applied to the rolling mill roll cooling system described in any one of Embodiment 1, is executed by the cooling water control module in the rolling mill roll cooling system, and includes the following steps: S1: Receive the real-time current value of mill 1 measured by the current detection sensor, and calculate the difference between the real-time current value of mill 1 and the idle current value of mill 1. S2: If the difference between the real-time current value of mill 1 and the idle current value of mill 1 is greater than the set current value difference, then control the cooling water solenoid valve and cooling water pump to open; otherwise, control the cooling water solenoid valve and cooling water pump to close.

[0028] In this embodiment, the idle current value of the rolling mill 1 is the current value of the rolling mill 1 in the non-rolling state, which is measured by the current detection sensor in the rolling mill roll cooling system and stored in the cooling water control module of the rolling mill roll cooling system.

[0029] Specifically, before starting the rolling mill 1, the rolling mill roll cooling system provided in Example 1 is checked, including whether the rolling mill roll cooling system is unobstructed and whether the water pressure and water volume are sufficient. Starting the rolling mill 1 requires following the equipment operation procedures, including starting the lubrication system, electrical system, and the rolling mill roll cooling system. After confirming that the above systems are operating normally, the main motor of the rolling mill 1 is started, and the rolling parameters of the rolling mill 1 are gradually adjusted to make the rolling mill 1 ready for production. After the rolling mill 1 is ready for production, the rolling mill roll cooling system provided in Example 1 can then implement the rolling mill roll cooling method provided in this example.

[0030] In addition, the rolling mill roll cooling system provided in Embodiment 1 also includes a control panel. The control panel is communicatively connected to the cooling water control module. The cooling water control module can automatically execute the rolling mill roll cooling method provided in this embodiment to open or close the cooling water solenoid valve and the cooling water pump (i.e., automatic mode), and can also receive instructions from the operator of the control panel and open or close the cooling water solenoid valve and the cooling water pump under the control of the instructions (i.e., manual mode).

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rolling mill roll cooling system, comprising a rolling mill (1), said rolling mill (1) comprising rolls (2), characterized in that, It also includes cooling water pipes (3), cooling water nozzles (4), cooling water solenoid valves, cooling water control modules, and current detection sensors; The cooling water pipe (3) can transport cooling water from the input end of the cooling water pipe (3) to the output end of the cooling water pipe (3); the input end of the cooling water nozzle (4) is connected to the output end of the cooling water pipe (3); the cooling water solenoid valve is installed on the input end of the cooling water pipe (3); the signal output end of the cooling water control module is connected to the signal input end of the cooling water solenoid valve; the signal output end of the current detection sensor is connected to the signal input end of the cooling water control module. The signal input terminal of the current detection sensor is connected to the signal output terminal of the rolling mill (1); the output terminal of the cooling water nozzle (4) faces the roll (2).

2. The rolling mill roll cooling system according to claim 1, characterized in that, The cooling water pipe (3) includes a cooling water output section (301) and a cooling water input section (302); The cooling water output section (301) is a cylindrical structure with one end closed and the other end open. The axis of the cooling water output section (301) is an arc-shaped structure. Several cooling water outlets are evenly distributed and opened on the inner side wall of the cooling water output section (301) along its length direction. The cooling water input section (302) is a cylindrical structure with both ends open. The open end of the cooling water output section (301) is connected to one end of the cooling water input section (302). The cooling water output section (301) is coaxially sleeved outside the roll (2), the cooling water outlet is the output end of the cooling water pipe (3), and the end of the cooling water input section (302) away from the cooling water output section (301) is the input end of the cooling water pipe (3).

3. A rolling mill roll cooling system according to claim 1, characterized in that, It also includes a cooling water storage system; The cooling water storage mechanism includes a cooling water storage tank and a cooling water pump; the cooling water pump is installed at the output end of the cooling water storage tank; The output end of the cooling water storage tank is connected to the input end of the cooling water pipe (3), and the signal input end of the cooling water pump is connected to the signal output end of the cooling water control module.

4. A method for cooling rolling mill rolls, characterized in that, The rolling mill roll cooling system according to any one of claims 1 to 3, executed by the cooling water control module of the rolling mill roll cooling system, includes the following steps: S1: Receive the real-time current value of the mill (1) measured by the current detection sensor, and calculate the difference between the real-time current value of the mill (1) and the idle current value of the mill (1). S2: If the difference between the real-time current value of the mill (1) and the idle current value of the mill (1) is greater than the set current value difference, then control the cooling water solenoid valve and the cooling water pump to open; otherwise, control the cooling water solenoid valve and the cooling water pump to close.

5. A method for cooling rolling mill rolls according to claim 4, characterized in that, The idle current value of the rolling mill (1) is the current value of the rolling mill (1) in the non-rolling state, which is measured by the current detection sensor in the rolling mill roll cooling system and stored in the cooling water control module of the rolling mill roll cooling system.

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