Cold rolling oil countercurrent control structure and cold rolling mill
By spraying liquid on the plate strip with rolling oil nozzles in a cold rolling mill, the kinetic energy of the reverse counterflow liquid is offset, and the oil mist, pollution and high energy consumption problems caused by compressed air purge are solved, and effective counterflow control of rolled oil and an environmentally friendly production environment are achieved.
Patent Information
- Application Number
- CN202421488836.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-06-27
AI Technical Summary
In the prior art, when compressed air purge is used to hinder the countercurrent of rolling oil, there are problems such as oil mist generation, environmental pollution, large energy consumption and noise pollution.
The liquid is sprayed on the plate tape by using a rolling oil nozzle. The sprayed liquid has a divided direction along the direction of the plate tape movement, offsetting the kinetic energy of the reverse counterflow liquid, thereby hindering the counterflow of the rolling oil.
It effectively overcomes the countercurrent of rolled oil, avoids the generation of oil mist and environmental pollution, reduces energy consumption and noise pollution, and improves the working environment.
Smart Images
Figure CN222790170U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of cold rolling of metal strips, in particular to a cold rolling oil countercurrent control structure and a cold rolling mill. Background Art
[0002] Rolling oil is often used as a process lubricant on aluminum strip cold rolling mills.
[0003] Combination Figure 1 As shown, the cold rolling mill in the prior art includes a deflector roller 5, an ironing roller 4, and a working roller (the working roller is divided into an upper working roller 1 and a lower working roller 2) from left to right. After the aluminum strip comes out of the unwinding pit 6, it passes through the deflector roller 5, the ironing roller 4, and the working roller in sequence. The ironing roller 4 is pressed on the surface of the aluminum plate, and the area between the ironing roller 4 and the working roller is a rolling oil spraying area, and the left side of the ironing roller 4 is a rolling oil overflow area. A rolling oil spray head 3 is provided in the rolling oil spraying area, and the rolling oil spray head 3 sprays rolling oil to cool, lubricate and clean the aluminum strip. After the rolling oil is sprayed, a large amount of rolling oil accumulates on the surface of the aluminum plate in the rolling oil spraying area between the ironing roller 4 and the working roller.
[0004] When the aluminum strip moves in the rolling direction (rightward), the rolling oil will flow back to the ironing roller 4 due to the extrusion of the working roller. In this way, driven by the rotation of the ironing roller 4 above the aluminum strip, the rolling oil adhering to the roller surface of the ironing roller 4 is brought into the area in front of the ironing roller 4 (rolling oil overflow area).
[0005] The rolling oil in the front area of the roller on the left side of the ironing roller 4 gathers more and more during the rolling process. Under the influence of the movement of the aluminum strip, part of the rolling oil in this area flows to the two ends of the ironing roller 4, overflows from the upper surface of the aluminum strip and flows into the oil collecting tank 7 below the rolling mill, and flows back into the rolling oil tank. However, in this process, part of the rolling oil is affected by the rotation and extrusion of the ironing roller 4, and obtains kinetic energy opposite to the rolling direction (kinetic energy to the left in the figure). The rolling oil in this area flows to the left and flows toward the unwinding machine. Under the combined effect of the reverse kinetic energy of the rolling oil and the gravitational potential energy, the rolling oil gathered in the overflow area of the rolling oil overcomes the movement and adhesion of the aluminum strip, continues to flow in the direction of the unwinding pit 6, and flows back to the outside of the oil collecting tank 7 of the rolling mill.
[0006] In order to prevent the rolling oil from flowing toward the unwinding pit 6, the inventor has installed a blowing device on the operating side above the deflector roller. The compressed air is used to blow the rolling oil to the right, thereby preventing the rolling oil from flowing toward the unwinding pit and increasing the rolling oil overflow toward the end of the ironing roller.
[0007] However, this approach has significant drawbacks, mainly due to the following problems:
[0008] 1. Compressed air blowing, the blowing air flow rate is fast, the air flow and rolling oil will stir up a large amount of oil mist, part of this oil mist will be sucked away by the oil mist fan, and part of it will spread outside the rolling mill, causing a large consumption of rolling oil and serious environmental pollution.
[0009] 2. Compressed air generates a lot of noise during the blowing process, which has an adverse impact on the production environment.
[0010] 3. Compressed air purging consumes a lot of energy. Calculated based on an air flow of 10m³ / min, the required air compressor power reaches 6KW / h, which results in a large energy consumption. Utility Model Content
[0011] The utility model aims to provide a cold rolling oil countercurrent control structure and a cold rolling mill, so as to solve a series of problems caused by using compressed air blowing to hinder the rolling oil from flowing toward the unwinding pit.
[0012] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a cold rolling oil backflow control structure, including a rolling oil nozzle located in the rolling oil overflow area, the rolling oil nozzle is used to spray liquid on the plate and strip, and the liquid sprayed by the rolling oil nozzle has at least a sub-direction along the movement direction of the plate and strip.
[0013] The principles and advantages of this scheme are: in this application, the rolling oil nozzle sprays oil, and the sprayed oil acts on the plate and strip. Since the liquid sprayed by the rolling oil nozzle has at least a sub-direction along the movement direction of the plate and strip, the flow energy of the sprayed liquid along the sub-direction of the movement of the plate and strip can offset the kinetic energy of the reverse countercurrent liquid, thereby hindering the rolling oil from flowing toward the uncoiling pit.
[0014] The problem in the prior art is that the oil backflow is blocked. The reason for the oil backflow is that there is too much oil on the strip. Therefore, the conventional idea is to reduce the oil on the strip, thereby reducing the oil backflow. Therefore, those skilled in the art will not think of spraying oil on the strip. However, the inventor of this solution overcomes the prejudice and sprays the oil on the strip. The flow energy of the sprayed liquid along the direction of the strip movement offsets the kinetic energy of the reverse counterflow liquid, thereby reducing the oil backflow. This solution to the problem is not easy to think of.
[0015] The effects of this solution are as follows: 1. It overcomes the backflow of rolling oil;
[0016] 2. The reverse flow of rolling oil is blocked by oil. Compared with using compressed air to prevent the reverse flow of rolling oil, this method is gentler and will not generate oil mist, thus avoiding the pollution of the environment and the loss of rolling oil caused by the oil mist being sucked away by the fan and diffused outside the rolling mill hood;
[0017] 3. The oil is used to block the reverse flow of rolling oil. Compared with using compressed air to prevent the reverse flow of rolling oil, the oil sprayed from the rolling oil nozzle consumes less energy, and the energy consumption is greatly reduced;
[0018] 4. The oil liquid is used to block the reverse flow of rolling oil, which will not produce loud noise, avoid noise pollution and improve the working environment of the staff.
[0019] Preferably, as an improvement, the liquid sprayed from the rolling oil nozzle has a direction along the width direction of the plate strip.
[0020] Therefore, the liquid sprayed from the rolling oil nozzle can not only offset the backflow of the oil, but also has flow kinetic energy along the width direction of the strip, so that the oil flows in the width direction of the strip, thereby flowing out of the surface of the strip more quickly and reducing the retention of oil on the surface of the strip.
[0021] Preferably, as an improvement, the rolling oil nozzle is located on the outside of the plate and strip, and the rolling oil nozzle is arranged at an angle.
[0022] Therefore, the rolling oil nozzle is located outside the plate and strip, and the oil sprayed by the rolling oil nozzle can be sprayed on the plate and strip without dead angles. The rolling oil nozzle is arranged at an angle, which can ensure that the oil sprayed by the rolling oil nozzle has both a sub-direction in the width direction of the plate and strip and a sub-direction in the moving direction of the plate and strip.
[0023] Preferably, as an improvement, the rolling oil nozzle is 10-20 cm above the plane where the strip is located.
[0024] Preferably, as an improvement, the angle between the rolling oil nozzle and the moving direction of the strip is 30-60 degrees.
[0025] Preferably, as an improvement, the injection flow rate of the rolling oil nozzle is 45-55 L / min.
[0026] Preferably, as an improvement, the injection velocity of the rolling oil nozzle is 2-6 m / s.
[0027] Preferably, as an improvement, the rolling oil nozzle consumes 2-4 KW / h of power, which is lower than the prior art.
[0028] In the present application, the parameters are controlled within the above range by setting and adjusting the height, angle, injection flow, injection speed and power of the rolling oil nozzle, so that the rolling oil nozzle is in an optimal working state, and the oil on the strip can be better flowed in the width direction of the strip, thereby ensuring the effect of preventing the oil from flowing back.
[0029] In addition, the utility model also adopts the following technical solution: a cold rolling mill, including an ironing roll and a working roll, the plate and strip pass through the ironing roll and the working roll in sequence, the area between the ironing roll and the working roll is a rolling oil injection area, the other side of the ironing roll is a rolling oil overflow area, and also includes any one of the above-mentioned cold rolling oil backflow control structures.
[0030] Preferably, as an improvement, it also includes an oil collecting tank located below the ironing roller and the working roller. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is a partial structural schematic diagram of a cold rolling mill in the prior art.
[0032] Figure 2 This is a schematic diagram of the partial structure of the improved cold rolling mill (top view).
[0033] Figure 3 It is a schematic diagram of the partial structure of the cold rolling mill in Example 2 (viewed from above).
[0034] Figure 4 It is a schematic diagram of the structure of the slider, support rod and rolling oil nozzle as seen from the left. DETAILED DESCRIPTION
[0035] The following is further described in detail through specific implementation methods:
[0036] The figure marks in the drawings of the specification include: upper working roll 1, lower working roll 2, rolling oil nozzle 3, ironing roll 4, deflector roll 5, uncoiling pit 6, oil collecting tank 7, metal strip 8, rolling oil nozzle 9, motor 10, screw 11, slider 12, support rod 13, fixing bolt 14, tightening bolt 15.
[0037] Example 1
[0038] Basically as attached Figure 2 As shown: This embodiment Figure 1 The present embodiment discloses a cold rolling mill, which includes, from left to right, a deflector roller 5, an ironing roller 4 and a working roller (the working roller is divided into an upper working roller 1 and a lower working roller 2), an oil collecting tank 7 located below the deflector roller 5, the ironing roller 4 and the working roller, and an uncoiling pit 6 located on the left side of the oil collecting tank 7, wherein an uncoiling machine is arranged in the uncoiling pit 6. After the metal sheet strip 8 (such as an aluminum sheet strip, and in other embodiments, a strip strip of other materials) comes out of the uncoiling pit 6, it passes through the deflector roller 5, the ironing roller 4 and the working roller in sequence and is transferred to the right. The area between the ironing roller 4 and the working roller is a rolling oil spraying area, and a rolling oil nozzle 3 is provided in the rolling oil spraying area, and the rolling oil nozzle 3 sprays rolling oil, and the left side of the ironing roller 4 is a rolling oil overflow area. The above is a structure in the prior art.
[0039] In this embodiment, a cold rolling oil backflow control structure is set on the basis of an existing cold rolling mill. A cold rolling oil backflow control structure of this embodiment includes a rolling oil nozzle 9 located in the rolling oil overflow area, and the rolling oil nozzle 9 is specifically installed (for example, connected by screws) on the frame of the cold rolling mill. In this embodiment, the rolling oil nozzle 9 is located on the outside of the metal strip 8 (the outside of the metal strip 8 refers to the outside of the metal strip 8 in the width direction, for example Figure 2 The rolling oil nozzle 9 is located on the outside of the metal strip 8). The rolling oil nozzle 9 is 10-20 cm above the plane where the metal strip 8 is located, and in this embodiment it is specifically 15 cm. The rolling oil nozzle 9 is tilted, and the angle between the rolling oil nozzle 9 and the movement direction of the metal strip 8 is 30-60 degrees, and in this embodiment it is preferably 45 degrees. The injection flow rate of the rolling oil nozzle 9 is 45-55L / min, specifically 50L / min. The injection flow rate of the rolling oil nozzle 9 is 2-6m / s, specifically 4m / s. In this embodiment, the power consumption of the rolling oil nozzle 9 is 2-4KW / h, specifically 3KW / h.
[0040] Thus, the rolling oil nozzle 9 sprays the rolling oil liquid onto the metal strip 8. Since the rolling oil liquid is sprayed in an inclined direction, the liquid sprayed from the rolling oil nozzle 9 has an X-direction ( Figure 2 The Y direction along the width of the metal strip 8 ( Figure 2 The flow of the sprayed liquid along the X-direction can offset the kinetic energy of the liquid flowing to the left, thereby reducing or hindering the liquid flowing to the left. At the same time, the flow along the Y-direction can make the oil on the metal strip 8 flow in the Y direction, so that the oil flows from the side of the metal strip 8 away from the rolling oil nozzle 9 into the oil collecting tank 7 for collection.
[0041] Example 2
[0042] This embodiment is further limited on the basis of embodiment 1, combined with Figure 3 and Figure 4As shown, a cold rolling oil backflow control structure also includes a slider 12, a lead screw 11, and a motor 10 for controlling the rotation of the lead screw 11. A support rod 13 is fixed (for example, welded or fixed by bolts) on the top of the slider 12, and the rolling oil nozzle 9 is located at the top of the support rod 13. In this embodiment, the slider 12 is slidably connected in a transverse direction of the width direction of the metal strip 8 (for example, a transversely arranged slide groove is provided on the frame of the cold rolling mill, and a slide rail located in the slide groove is fixed by screws at the bottom of the slider 12, or a transversely arranged slide rail is fixed by screws on the frame of the cold rolling mill, and a slide groove matching the slide rail is provided at the bottom of the slider 12) on the frame of the cold rolling mill, the motor 10 is fixed on the frame of the cold rolling mill by bolts, the output shaft of the motor 10 is coaxially fixedly connected with the lead screw 11 (for example, connected by a coupling), and the lead screw 11 passes through the slider 12 and is threadedly connected with the slider 12.
[0043] Therefore, the motor 10 drives the lead screw 11 to rotate, and the lead screw 11 drives the slider 12 to slide horizontally along the Y direction on the frame, thereby realizing the adjustment of the Y direction position of the rolling oil nozzle 9, so that the rolling oil nozzle 9 can adjust the Y direction position according to the metal plate strip 8 of different widths.
[0044] In addition, in some other embodiments, the support rod 13 is a telescopic rod, which is formed by two sleeves being sleeved together. A tightening bolt 15 is threadedly connected to the sleeve below the support rod 13, and the tightening bolt 15 is pressed against the inner sleeve. When adjusting the height of the support rod 13, the tightening bolt 15 is loosened, and then the length of the support rod 13 is adjusted. After adjustment, the tightening bolt 15 is tightened to prevent the telescopic rod from being extended or retracted. In this way, the height of the support rod 13 is adjustable.
[0045] In addition, in other embodiments, the rolling oil nozzle 9 is rotatably connected to the top of the support rod 13. The specific rotation method is: a rotation groove is provided at the bottom of the housing of the rolling oil nozzle 9, the top of the support rod 13 is located in the rotation groove, and a bearing can be provided between the top of the support rod 13 and the rotation groove. A fixing bolt 14 is provided between the housing of the rolling oil nozzle 9 and the top of the support rod 13. Therefore, by loosening the fixing bolt 14, the rolling oil nozzle 9 can be rotated on the top of the support rod 13. When the angle of the rolling oil nozzle 9 is adjusted, the fixing bolt 14 is tightened to fix the rolling oil nozzle 9, and the rolling oil nozzle 9 will not rotate arbitrarily.
[0046] Therefore, through this embodiment, the rolling oil nozzle 9 can be adjusted in position, height and angle in the Y direction, so that the position and injection direction of the rolling oil nozzle 9 can be adjusted according to actual production conditions, so that the oil sprayed by the rolling oil nozzle 9 can better hinder the backflow of oil, and avoid the rolling oil nozzle 9 being unable to adjust and the sprayed oil being unable to accurately act on the reflux oil on the plate and strip.
[0047] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A cold rolling oil backflow control structure, characterized in that: It comprises a rolling oil nozzle located in the rolling oil overflow area, the rolling oil nozzle is used to spray liquid on the plate strip, and the liquid sprayed by the rolling oil nozzle has at least a sub-direction along the moving direction of the plate strip.
2. A cold rolling oil backflow control structure according to claim 1, characterized in that: The liquid sprayed from the rolling oil nozzle has a direction along the width direction of the plate strip.
3. A cold rolling oil backflow control structure according to claim 1, characterized in that: The rolling oil nozzle is located on the outside of the plate and strip, and the rolling oil nozzle is arranged obliquely.
4. A cold rolling oil backflow control structure according to claim 3, characterized in that: The rolling oil nozzle is 10-20 cm above the plane where the plate and strip are located.
5. The cold rolling oil backflow control structure according to claim 3, characterized in that: The angle between the rolling oil nozzle and the moving direction of the plate and strip is 30-60 degrees.
6. A cold rolling oil backflow control structure according to claim 1, characterized in that: The injection flow rate of the rolling oil nozzle is 45-55 L / min.
7. A cold rolling oil backflow control structure according to claim 1, characterized in that: The injection velocity of the rolling oil nozzle is 2-6 m / s.
8. The cold rolling oil backflow control structure according to claim 1, characterized in that: The rolling oil nozzle consumes 2-4KW / h of power.
9. A cold rolling mill, comprising an ironing roll and a working roll, wherein the strip passes through the ironing roll and the working roll in sequence, wherein a rolling oil spraying area is provided between the ironing roll and the working roll, and the other side of the ironing roll is a rolling oil overflow area, wherein: It also includes a cold rolling oil backflow control structure as described in any one of claims 1-8.
10. The cold rolling mill according to claim 9, characterized in that: Also included are oil collection tanks located below the ironing roll and the working rolls.