Spray quenching system and method for centrifugal working roll

Abstract

The invention discloses a spray quenching system and method for a centrifugal working roller, and belongs to the technical field of heat treatment, the spray quenching system comprises a bracket, rotating devices arranged at the front and rear ends of the bracket, a cooling device and a temperature measuring device arranged on the inner wall of the bracket, and a centralized controller; the method comprises the steps of adjusting the cooling device; setting the rotating speed of the rotating device; inputting a preset cooling speed, and judging a cooling mode by the system; starting a spray quenching system for the centrifugal working rollers, collecting the temperature of the centrifugal working rollers corresponding to each row of nozzles in real time, comparing the temperature with a preset cooling speed curve in the centralized controller, and respectively adjusting the opening degree of each row of nozzles; and according to the cooling speed record of each section of the centrifugal working roll in the centralized control system, whether cooling speed abnormal points exist is screened out, quality inspection is carried out, and whether secondary spray quenching is needed is determined. According to the method, the field safety and production process use requirements can be met, the fluctuation range of important parameters such as water pressure and water flow is reduced, and the product quality consistency is improved.

Description

Technical Field

[0001] The invention relates to the field of heat treatment technology, in particular to a spray quenching system and method for a centrifugal working roll. Background Art

[0002] In the fields of mechanical engineering, heat treatment technology and material processing engineering, the spray quenching equipment of centrifugal work rolls is one of the key equipment. Centrifugal work rolls are an important equipment for rolling medium plates, and their quality directly affects the quality of medium plates. During the rolling process, the centrifugal work rolls need to undergo a forced cooling process of spray to ensure that their cooling speed is continuous and uniform, thereby ensuring the process quality of the medium plate.

[0003] Existing centrifugal work roll spray quenching equipment usually adopts axial flow fans and water pipes for forced cooling. The function of axial flow fans and water pipes is to provide cooling air and water to cool the centrifugal work rolls. However, the main factors of this cooling method, such as wind direction, air volume, water pressure, water flow, etc., cannot be quantitatively controlled, resulting in an uncontrolled production process, which seriously affects the process quality of the product.

[0004] The existing centrifugal working roller spray quenching equipment has the following problems: First, since the main factors such as wind direction, air volume, water pressure, and water flow of the axial flow fan and the water pipe cannot be quantitatively controlled, the production process is out of control, which seriously affects the process quality of the product. Secondly, in the existing nozzle cooling device, the distance between each nozzle cannot be constant, resulting in uneven cooling area, affecting the cooling effect. Finally, the existing nozzle is connected to the water storage device through a water pipe, but due to the unstable pressure and flow of the water storage device, the pressure and flow at the nozzle cannot be constant, further affecting the cooling effect. Therefore, the existing centrifugal working roller spray quenching equipment has obvious deficiencies in quantitatively controlling important parameters such as air volume, water pressure, and water flow, and is in urgent need of improvement. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a spray quenching system and method for centrifugal working rolls, which can meet the safety and production process requirements on site, reduce the fluctuation range of important parameters such as water pressure and water flow, and improve product quality consistency.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A spray quenching system for a centrifugal working roll comprises a support, a rotating device arranged at the front and rear ends of the support, a cooling device and a temperature measuring device arranged on the inner wall of the support, and a centralized controller; The rotating device is a machine tool, and the machine tool comprises a motor and a supporting wheel; the supporting wheel is arranged on a bearing of the motor; The cooling device comprises a plurality of rows of nozzles evenly arranged on the inner wall of the bracket, each row of nozzles has the same number, is arranged at the same distance and is aligned, and each row of nozzles is provided with a switch and an opening regulating valve; each nozzle comprises a frame and a nozzle arranged on the frame; the nozzle comprises a water spray pipe, a spray pipe and an air spray pipe; The nozzle is connected to a constant pressure water storage device and an air storage device, both of which include a water pump and a pressure regulating valve; the water storage device is connected to a water spray pipe and a spray pipe respectively; the air storage device is connected to a spray pipe and an air spray pipe respectively; The temperature measuring device comprises a temperature sensor arranged at each column of nozzles; The centralized controller controls the rotation speed of the rotating device, the mode and opening degree of the cooling device, and collects the temperature signal of the temperature measuring device.

[0007] A further improvement of the technical solution of the present invention is that: the bracket is of an open type.

[0008] A further improvement of the technical solution of the present invention is that the rack is a movable rack capable of adjusting the length and angle.

[0009] A method for spray quenching a centrifugal working roll comprises the following steps: S1. Hang the centrifugal working roll in the spray quenching system for the centrifugal working roll and adjust the cooling device; S2, setting the speed of the rotating device; S3, inputting a preset cooling speed into the centralized control system, and the system determines the cooling mode. If the preset cooling speed is below a first preset value, an air cooling mode is adopted; if the preset cooling speed is between the first preset value and the second preset value, a mist cooling mode is adopted; if the preset cooling speed is above the second preset value, a water cooling mode is adopted; S4, start the spray quenching system for the centrifugal working roll, collect the centrifugal working roll temperature corresponding to each row of nozzles in real time, compare it with the cooling speed curve preset in the centralized controller, and adjust the opening of each row of nozzles respectively; S5. Complete the quenching of the centrifugal working rolls, and screen out abnormal cooling speed points based on the cooling speed records of the centrifugal working rolls in each section in the centralized control system, conduct quality inspection and decide whether secondary quenching is needed.

[0010] A further improvement of the technical solution of the present invention is that S1 specifically comprises the following steps: S11 adjusts the nozzle length and angle according to the diameter parameter of the centrifugal working roller, so that each nozzle is at the same distance from the centrifugal working roller and is aligned with the center of the centrifugal working roller; S12 adjusts the nozzle switch corresponding to the centrifugal working roller according to the length parameter of the centrifugal working roller and sets it to the punching state.

[0011] A further improvement of the technical solution of the present invention is that the S4 body comprises the following steps: S41, controlling the cooling speeds of adjacent columns to be within the same threshold. When the cooling speed of a column exceeds the threshold, first adjusting the nozzle opening and cooling mode of the column to make the cooling speed of the column and adjacent columns within the same threshold; S42, when the cooling speed of each column is greater than the preset cooling speed, reduce the opening of the regulating valve to make the cooling speed the same as the preset cooling speed; in the mist cooling mode or the water cooling mode, when the opening of the regulating valve reaches the minimum threshold, switch the cooling mode to the maximum threshold of the air cooling mode or the mist cooling mode and continue to adjust; S43. When the cooling speed of each column is less than the preset cooling speed, increase the opening of the regulating valve to make the cooling speed the same as the preset cooling speed; in the air cooling mode or the mist cooling mode, when the opening of the regulating valve reaches the maximum threshold, switch the cooling mode to the minimum threshold of the mist cooling mode or the water cooling mode and continue to adjust.

[0012] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is: 1. In the present invention, each row of nozzles is provided with a switch, and the nozzles are turned on or off by the switch to ensure that rollers of different lengths can be cooled.

[0013] 2. In the cooling device of the present invention, the distance between each nozzle is constant, and the forced cooling area can be evenly and completely covered, which solves the problem in the prior art that the cooling area is uneven due to the inconstant nozzle distance, affecting the cooling effect.

[0014] 3. The spray quenching system of the present invention can switch between three modes: water cooling, mist cooling and air cooling. By adjusting the degree of switching, different cooling methods and different cooling speeds can be obtained, thereby reducing the risk of roller quenching failure and improving the roller quenching quality. Moreover, the present invention can achieve quantitative control of important parameters such as air volume, water pressure, water flow, and uniform cooling effect, thereby greatly improving the continuous and uniform cooling speed of the centrifugal working roll, thereby improving the process quality of the medium plate and improving product consistency.

[0015] 4. In the present invention, the nozzle frame is a movable frame, which can adjust the distance between the nozzle and the roller, and adjust the angle between the nozzle and the roller to meet the cooling requirements of rollers with different diameters. This device has a wider applicability.

[0016] 5. The roller rotating device of the present invention adopts a machine tool-type design, and supports the roller body or roller neck through a supporting wheel to ensure that the roller can rotate evenly; the supporting wheel is installed in the bearing, and the roller is driven to rotate through the rotational force of the bearing seat and the motor. The nozzle and the roller move at a constant speed relative to each other, thereby improving the uniformity of quenching and cooling of the roller surface and improving product quality.

[0017] 6. The support in the present invention is an open-type device, which can be transported by equipment such as bridge cranes, and can quickly and effectively place the rollers on the rotating parts, reducing the process transportation time, facilitating the operation of on-site operators, improving labor efficiency, and shortening the high-temperature radiation time of the rollers to personnel during operation. At the same time, the temperature reduction during transportation is reduced, the heating temperature can be effectively reduced, the risk of roller quenching failure is reduced, and the production cost is reduced.

[0018] 7. In the present invention, by comparing the actual cooling speed with the predetermined speed and adjusting the cooling mode and valve opening, the cooling speed of the working roll can be tracked and optimized in real time.

[0019] 8. In the present invention, the cooling curve of the working roll can be used to detect whether there are process defects at the abnormal point, and the positioning is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a spray quenching system for centrifugal working rolls; Among them, 1. bracket, 2. nozzle. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings and embodiments: In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" ... etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] like Figure 1 As shown, a spray quenching system for centrifugal working rolls includes a support 1, a rotating device arranged at the front and rear ends of the support 1, a cooling device and a temperature measuring device arranged on the inner wall of the support 1, and a centralized controller; The support 1 is of an open type and can be transported by equipment such as a bridge crane, so that the roller can be placed on the rotating part quickly and effectively; The rotating device is a machine tool, which includes a motor and a supporting wheel; the supporting wheel is arranged on the bearing of the motor, and drives the roller to rotate through the rotation force of the bearing seat and the motor, so as to ensure that the roller can rotate evenly; the supporting wheel is arranged on the bearing seat and the bearing to support the roller body or the roller neck; The cooling device comprises a plurality of rows of nozzles 2 uniformly arranged on the inner wall of the support 1, the number of nozzles 2 in each row is the same, the nozzles 2 are arranged at the same distance and aligned, each row of nozzles 2 is provided with a switch and an opening regulating valve, the nozzles 2 in this row are opened or closed by the switch to ensure that the rollers of different lengths are cooled, and the opening of the nozzles 2 in this row is uniformly adjusted by the opening regulating valve; each nozzle 2 comprises a frame and a nozzle arranged on the frame; the nozzle comprises a water spray pipe, a spray pipe and an air spray pipe, and has multiple cooling modes such as water spray, spray and air spray; the frame is a movable frame capable of adjusting the length and angle; The nozzle 2 is connected to a constant pressure water storage device and an air storage device, which include a water pump and a pressure regulating valve to ensure that the water pressure in the water storage device is constant; the water storage device is connected to a water spray pipe and a spray pipe respectively; the air storage device is connected to a spray pipe and an air spray pipe respectively; The temperature measuring device comprises a temperature sensor arranged at each column of nozzles 2; The centralized controller controls the rotation speed of the rotating device, the mode and opening degree of the cooling device, and collects the temperature signal of the temperature measuring device.

[0024] A method for spray quenching a centrifugal working roll comprises the following steps: S1. Hang the centrifugal working roll in the spray quenching system for the centrifugal working roll and adjust the cooling device; S11 adjusts the length and angle of the nozzle 2 according to the diameter parameter of the centrifugal working roller, so that each nozzle 2 is at the same distance from the centrifugal working roller and is aligned with the center of the centrifugal working roller; S12 adjusts the switch of the nozzle 2 corresponding to the centrifugal working roller according to the length parameter of the centrifugal working roller and sets it to the punching state; S2, setting the speed of the rotating device; S3, inputting a preset cooling speed into the centralized control system, and the system determines the cooling mode. If the preset cooling speed is below a first preset value, an air cooling mode is adopted; if the preset cooling speed is between the first preset value and the second preset value, a mist cooling mode is adopted; if the preset cooling speed is above the second preset value, a water cooling mode is adopted; S4, start the spray quenching system for the centrifugal working roll, and collect the centrifugal working roll temperature corresponding to each row of nozzles 2 in real time, compare it with the cooling speed curve preset in the centralized controller, and adjust the opening of each row of nozzles 2 respectively; S41, controlling the cooling speeds of adjacent columns to be within the same threshold. When the cooling speed of a column exceeds the threshold, first adjusting the nozzle 2 opening and cooling mode of the column to make the cooling speed of the column and adjacent columns within the same threshold; S42, when the cooling speed of each column is greater than the preset cooling speed, reduce the opening of the regulating valve to make the cooling speed the same as the preset cooling speed; in the mist cooling mode or the water cooling mode, when the opening of the regulating valve reaches the minimum threshold, switch the cooling mode to the maximum threshold of the air cooling mode or the mist cooling mode and continue to adjust; S43, when the cooling speed of each column is less than the preset cooling speed, increase the opening of the regulating valve to make the cooling speed the same as the preset cooling speed; in the air cooling mode or the mist cooling mode, when the opening of the regulating valve reaches the maximum threshold, switch the cooling mode to the minimum threshold of the mist cooling mode or the water cooling mode and continue to adjust; S5. Complete the quenching of the centrifugal working rolls, and screen out abnormal cooling speed points based on the cooling speed records of the centrifugal working rolls in each section in the centralized control system, conduct quality inspection and decide whether secondary quenching is needed.

[0025] Example 1 This embodiment provides a new type of centrifugal working roll quenching system, including a rotating device for supporting the roll, multiple rows of directional nozzles 2 and a quantitative constant pressure water storage device. A rotating device for supporting the roll is installed on each of the left and right sides of the equipment. The device is driven by a motor and can accurately control the rotation speed, with a speed range of 0-100 rpm. Multiple rows of directional nozzles 2 are installed on the inner wall of the bracket 1, and the arrangement direction of the nozzles 2 is parallel to the rotation direction of the centrifugal working roll. The spacing between the nozzles is constant at 5 cm, which can evenly and completely cover the forced cooling area. A quantitative constant pressure water storage device is installed at the bottom of the bracket 1. The device consists of a water pump and a pressure regulating valve, which can ensure that the water pressure in the water storage device is constant, with a pressure range of 0.1-0.5MPa and a flow range of 1-5 cubic meters / hour. The capacity of the gas storage device is 500L, the pressure is 0.1-0.5MPa, and the flow range is 1-10L / min. The nozzle 2 is connected to the water storage device and the air storage device through a soft water pipe, and the diameter of the soft water pipe is 10 mm, which can reduce the influence of water pressure and water flow fluctuations on the cooling effect of the nozzle. In summary, the present invention can meet the safety and production process requirements on site, reduce the fluctuation range of important parameters such as water pressure and water flow, and improve the consistency of product quality.

Claims

1. A spray quenching system for centrifugal working rolls, characterized in that: It comprises a support (1), a rotating device arranged at the front and rear ends of the support (1), a cooling device and a temperature measuring device arranged on the inner wall of the support (1), and a centralized controller; The rotating device is a machine tool, and the machine tool comprises a motor and a supporting wheel; the supporting wheel is arranged on a bearing of the motor; The cooling device comprises a plurality of rows of nozzles (2) uniformly arranged on the inner wall of a support (1), the number of nozzles (2) in each row being the same, being arranged at the same distance and being aligned, and each row of nozzles (2) being provided with a switch and an opening regulating valve; each nozzle (2) comprising a frame and a nozzle arranged on the frame; the nozzle comprising a water spray pipe, a spray pipe and an air spray pipe; The nozzle (2) is connected to a constant-pressure water storage device and an air storage device, both of which include a water pump and a pressure regulating valve; the water storage device is respectively connected to a water spray pipe and a spray pipe; the air storage device is respectively connected to a spray pipe and an air spray pipe; The temperature measuring device comprises a temperature sensor arranged at each row of nozzles (2); The centralized controller controls the rotation speed of the rotating device, the mode and opening degree of the cooling device, and collects the temperature signal of the temperature measuring device.

2. The centrifugal work roll spray quenching system according to claim 1, characterized in that: The bracket (1) is of an open type.

3. The spray quenching system for centrifugal working rolls according to claim 1, characterized in that: The frame is a movable frame capable of adjusting the length and angle.

4. A method for spray quenching a centrifugal work roll, characterized in that: The use of the centrifugal work roll spray quenching system as claimed in claims 1 to 3 comprises the following steps: S1. Hang the centrifugal working roll in the spray quenching system for the centrifugal working roll and adjust the cooling device; S2, setting the speed of the rotating device; S3, inputting a preset cooling speed into the centralized control system, and the system determines the cooling mode. If the preset cooling speed is below a first preset value, an air cooling mode is adopted; if the preset cooling speed is between the first preset value and the second preset value, a mist cooling mode is adopted; if the preset cooling speed is above the second preset value, a water cooling mode is adopted; S4, starting the centrifugal working roll spray quenching system, and collecting the centrifugal working roll temperature corresponding to each row of nozzles (2) in real time, comparing it with the cooling speed curve preset in the centralized controller, and adjusting the opening of each row of nozzles (2) respectively; S5. Complete the quenching of the centrifugal working rolls, and screen out abnormal cooling speed points based on the cooling speed records of the centrifugal working rolls in each section in the centralized control system, conduct quality inspection and decide whether secondary quenching is needed.

5. The method for quenching a centrifugal work roll according to claim 4, characterized in that: S1 specifically includes the following steps: S11 adjusts the length and angle of the nozzle (2) according to the diameter parameter of the centrifugal working roller, so that each nozzle (2) is at the same distance from the centrifugal working roller and is aligned with the center of the centrifugal working roller; S12 adjusts the switch of the nozzle (2) corresponding to the centrifugal working roller according to the length parameter of the centrifugal working roller and sets it to the punching state.

6. The method for quenching a centrifugal work roll according to claim 4, characterized in that: The S4 body includes the following steps: S41, controlling the cooling speeds of adjacent columns to be within the same threshold. When the cooling speed of a column exceeds the threshold, first adjusting the opening degree and cooling mode of the nozzle (2) of the column to make the cooling speed of the column and adjacent columns within the same threshold; S42, when the cooling speed of each column is greater than the preset cooling speed, reduce the opening of the regulating valve to make the cooling speed the same as the preset cooling speed; in the mist cooling mode or the water cooling mode, when the opening of the regulating valve reaches the minimum threshold, switch the cooling mode to the maximum threshold of the air cooling mode or the mist cooling mode and continue to adjust; S43. When the cooling speed of each column is less than the preset cooling speed, increase the opening of the regulating valve to make the cooling speed the same as the preset cooling speed; in the air cooling mode or the mist cooling mode, when the opening of the regulating valve reaches the maximum threshold, switch the cooling mode to the minimum threshold of the mist cooling mode or the water cooling mode and continue to adjust.

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