An insulation box for a hot rolling mill
By setting up an insulated box at the entrance of the hot rolling mill and using a frame correction mechanism and inert gas to maintain the temperature, the problem of poor correction effect of the pinch rolls was solved, and effective correction and temperature control of the strip steel were achieved, thus improving the production quality and efficiency of the hot rolling mill.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-23
- Publication Date
- 2026-03-27
AI Technical Summary
The existing pinch rolls of hot rolling mills have poor correction effects, which can easily lead to problems such as strip deviation, edge cracking, and serrated edges, affecting the quality of thin strip products and the production efficiency of the rolling mill, and may also damage the rolls.
Design an insulation box for a hot rolling mill, which is set at the entrance of the hot rolling mill. The centering frame is driven to move by a frame correction mechanism, and the strip is corrected by the friction of the pinch rollers. At the same time, inert gas is blown into the insulation chamber to maintain the temperature and prevent heat loss.
It effectively improves the strip steel correction effect, maintains the temperature at the hot rolling mill inlet, ensures smooth hot rolling, reduces strip steel damage, and improves production quality and efficiency.
Smart Images
Figure CN117000792B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of thin strip casting and rolling equipment, in particular to a heat preservation box for a hot rolling mill. BACKGROUND
[0002] In a hot rolling processing equipment, the entry pinch roll of a thin strip casting and rolling hot rolling mill plays a key role in the entire production line. The pinch roll not only receives the semi-solid strip steel from the casting machine, but also controls the tension and direction of the strip steel entering the hot rolling mill and corrects the deviation. Therefore, if the strip steel has problems such as breakage, deviation, edge cracking, and snake egg when passing through the pinch roll, it will cause quality problems in the subsequent rolling thin strip products. At the same time, if the deviation correction effect of the pinch roll is not good, it will also cause damage to the subsequent thin strip products. Moreover, the strip steel may also cause damage to the roll surface of the roll, thereby affecting the production quality and production efficiency of the entire rolling mill.
[0003] Therefore, the present application is designed by the present inventor on the basis of years of production and design experience in this field and related fields, and through repeated tests, in order to solve the problems existing in the prior art. SUMMARY
[0004] The purpose of the present application is to provide a heat preservation box for a hot rolling mill, which can effectively improve the deviation correction effect of the strip steel entering the hot rolling mill.
[0005] To achieve the above-mentioned purpose, the present application provides a heat preservation box for a hot rolling mill, which is arranged at the entrance of the hot rolling mill, wherein the heat preservation box comprises a box body, a pinch roll mechanism, a centering frame, a fixed base and a frame deviation correction mechanism, the box body has a heat preservation cavity passing through the center line of the hot rolling mill, the pinch roll mechanism has at least a pair of pinch rolls arranged in the heat preservation cavity, the box body is fixed to the centering frame, the centering frame is arranged on the fixed base, and the frame deviation correction mechanism is connected with the centering frame and can drive the centering frame to move left and right on the fixed base.
[0006] The heat preservation box for a hot rolling mill as described above, wherein a header is arranged in the heat preservation cavity, and inert gas is blown into the heat preservation cavity through the header.
[0007] The heat preservation box for a hot rolling mill as described above, wherein the inner walls of the box body are all water-cooled panels.
[0008] The heat preservation box for a hot rolling mill as described above, wherein a roller table is further installed in the heat preservation cavity, and the roller table is arranged between the pinch roll and the entrance of the heat preservation cavity along the center line of the hot rolling mill.
[0009] The heat preservation box for the hot rolling machine as described above, wherein the heat preservation cavity is further provided with an inlet roller, which is arranged at one end of the roller way away from the pinch roller.
[0010] The heat preservation box for the hot rolling machine as described above, wherein the pinch roller mechanism further comprises an inner frame and an outer frame, the outer frame is fixedly connected to the centering frame and located outside the box body, one end of the inner frame is arranged in the heat preservation cavity, the other end of the inner frame is sealed through the box body and fixedly connected with the outer frame, and a pair of the pinch rollers are rotatably mounted on the inner frame.
[0011] The heat preservation box for the hot rolling machine as described above, wherein the inner frame is further provided with a pinch roller deviation rectifying device capable of adjusting the position of the pinch roller.
[0012] The heat preservation box for the hot rolling machine as described above, wherein the fixed base comprises two spaced apart guide rails, which are horizontally arranged and perpendicular to the center line of the hot rolling machine, and the centering frame is arranged on the two guide rails and can reciprocate along the guide rails under the drive of the frame deviation rectifying mechanism.
[0013] The heat preservation box for the hot rolling machine as described above, wherein the bottom of the centering frame is rotatably mounted with a roller, which is in rolling cooperation with the guide rail.
[0014] The heat preservation box for the hot rolling machine as described above, wherein the frame deviation rectifying mechanism is a hydraulic servo mechanism or an electric servo mechanism.
[0015] Compared with the prior art, the heat preservation box for the hot rolling machine has the following characteristics and advantages:
[0016] The heat preservation box for the hot rolling machine is arranged at the inlet of the hot rolling machine, the gas in the heat preservation cavity is controlled by the box body to prevent heat loss, thereby the temperature of the strip steel at the inlet of the hot rolling machine can be maintained to facilitate the smooth progress of the hot rolling work; at the same time, the centering frame is driven to move by the frame deviation rectifying mechanism, and the friction force of the pinch roller on the centering frame acts on the strip steel to realize the deviation rectification of the strip steel. BRIEF DESCRIPTION OF DRAWINGS
[0017] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shape and scale of each component in the drawings are only illustrative and are used to help understand the present application, and are not specific limitations on the shape and scale of each component of the present application. Those skilled in the art can select various possible shapes and scales to implement the present application according to specific circumstances under the guidance of the present application.
[0018] Figure 1 is a sectional view of the heat preservation box.
[0019] Figure 2 A side view of the heat preservation box body according to the present application.
[0020] Explanation of reference numerals
[0021] 100, heat preservation box body; 10, box body;
[0022] 20, pinch roll mechanism; 21, pinch roll;
[0023] 22, inner frame; 23, outer frame;
[0024] 30, centering frame; 31, roller;
[0025] 40, fixed base; 41, guide rail;
[0026] 50, frame deviation rectifying mechanism; 60, roller table;
[0027] 70, entry roller; 80, exit roller. DETAILED DESCRIPTION
[0028] The details of the application can be more clearly understood in connection with the attached drawings and the following description of specific embodiments of the application. However, it should be understood that the application described herein is merely an explanation of the application and should not be considered limiting in any way. In light of the teachings provided herein one skilled in the art will appreciate a variety of modifications applied to the application that will achieve the same objects of the application. The application is defined by the scope of the claims appended hereto.
[0029] As shown in Figure 1 , Figure 2 , the present application provides a heat preservation box body 100 for a hot rolling mill, which is arranged at the entry of the hot rolling mill. The heat preservation box body 100 comprises a box body 10, a pinch roll mechanism 20, a centering frame 30, a fixed base 40 and a frame deviation rectifying mechanism 50. The box body 10 has a heat preservation cavity through the center line of the hot rolling mill. The pinch roll mechanism 20 has at least a pair of pinch rolls 21 arranged in the heat preservation cavity. The box body 10 is fixed to the centering frame 30. The centering frame 30 is arranged on the fixed base 40. The frame deviation rectifying mechanism 50 is connected to the centering frame 30 and can drive the centering frame 30 to move left and right on the fixed base 40.
[0030] The heat preservation box body 100 for a hot rolling mill according to the present application is arranged at the entry of the hot rolling mill. The gas in the heat preservation cavity is controlled by the box body 10 to prevent heat loss, so as to maintain the temperature of the strip steel at the entry of the hot rolling mill, thereby ensuring the smooth operation of the hot rolling work. Meanwhile, the centering frame 30 is driven to move by the frame deviation rectifying mechanism 50, and the friction of the pinch rolls 21 on the centering frame 30 acts on the strip steel, thereby rectifying the strip steel.
[0031] Compared with the prior art, the heat preservation box body 100 for the hot rolling mill solves the technical problems of the prior art, such as the poor correction effect of only relying on the self-correction of the thin strip casting and rolling mill entrance pinch roll, the damage of the strip steel caused by the correction, the damage of the plate shape, the damage of the pinch roll surface of the thin strip casting and rolling mill entrance, the influence on the quality and production efficiency of the hot rolling ultra-thin strip, and the like.
[0032] In an optional embodiment of the present application, a header (not shown in the figure) is arranged in the heat preservation cavity, and the inert gas is blown into the heat preservation cavity through the header, so as to reduce the oxidation of the strip steel.
[0033] In an optional example of the embodiment, a sealing device of a water seal is arranged in the box body 10, so as to reduce the deformation caused by the heat transfer of the hot strip steel to the box body. The water seal is an integral structure with the box body, and the outer wall of the box body is a sandwich structure as a whole, and the inside is cooled by water.
[0034] In an optional embodiment of the present application, the outlet of the heat preservation cavity of the box body 10 is sealingly connected with the inlet of the hot rolling mill, so as to avoid the loss of heat and gas in the heat preservation cavity.
[0035] In an optional embodiment of the present application, the inner walls of the box body 10 are all water-cooled panels, so as to prolong the service life of the box body 10.
[0036] In an optional example of the embodiment, the box body 10 and the centering frame 30 are welded.
[0037] In an optional embodiment of the present application, a roller table 60 is further arranged in the heat preservation cavity, and the roller table 60 is arranged between the pinch roll 21 and the inlet of the heat preservation cavity along the center line of the hot rolling mill.
[0038] In an optional example of the embodiment, an inlet roll 70 is further arranged in the heat preservation cavity, and the inlet roll 70 is arranged at the end of the roller table 60 away from the pinch roll 21. The inlet roll 70 guides the strip steel entering the heat preservation cavity to the roller table 60, and then the strip steel is transported to the pinch roll 21 through the roller table 60, and the pinch roll 21 presses the strip steel.
[0039] In an optional example of the embodiment, an outlet roll 80 is further arranged at the outlet of the box body 10, so as to guide the strip steel out of the hot rolling mill.
[0040] In an alternative embodiment of the present application, the pinch roll mechanism 20 further comprises an inner frame 22 and an outer frame 23, the outer frame 23 is fixedly connected to the centering frame 30 and located outside the box body 10, one end of the inner frame 22 is arranged in the heat preservation cavity, the other end of the inner frame 22 is sealedly penetrated through the box body 10 and fixedly connected with the outer frame 23, and a pair of pinch rolls 21 are rotatably installed on the inner frame 22. The double-layer frame structure is adopted to further prevent the loss of gas and heat in the heat preservation cavity.
[0041] In an alternative example, the inner frame 22 and the outer frame 23 are further provided with water cooling chambers, and the water cooling chambers are connected with flexible connecting pipelines of intermediate medium to prevent the inside of the heat preservation cavity from being contaminated. The inflow and outflow of roll cooling water are connected through the rotary joints and the hoses (flexible connecting pipelines) connected with the rotary joints located on the operating side of the roll to meet the movement of the frame.
[0042] In an alternative example, the driving of the two pinch rolls 21 (upper pinch roll and lower pinch roll) is respectively realized through a single motor, a speed reducer and a universal coupling. The transmission shaft of each motor is provided with a shaft bracket device which can move with the movement of the centering frame.
[0043] In an alternative example, the pinch roll mechanism 20 further comprises an upper roll supporting seat, a lower roll supporting seat, a roll changing device, a universal coupling shaft and a driving and electric base. The two pinch rolls 21 are arranged in an upper and lower manner and are installed on the inner frame 22 through the upper roll supporting seat and the lower roll supporting seat respectively.
[0044] In an alternative example of the embodiment, the inner frame 22 is further provided with a pinch roll deviation rectifying device (not shown in the figure) which can adjust the position of the pinch roll 21.
[0045] In an alternative example, the pinch roll deviation rectifying device is a hydraulic (or electric) device for positioning the upper pinch roll and is respectively installed on the top of the working side and the driving side to control the roll gap and the pressing force of the upper pinch roll and the lower pinch roll. According to the signal of the anti-deviation sensor, the top thin strip casting and rolling mill inlet pinch roll control strip steel is tilted.
[0046] Preferably, the pinch roll 21 is offset by 50 mm towards the outlet to ensure that there is sufficient friction to control the strip steel.
[0047] In an alternative example, the roll changing device is a locking device, the lower roll supporting seat is located on the U-shaped bottom of the inner frame and is fixed through the locking device. After starting the locking device, the inner frame can be taken out of the outer frame by using the hydraulic cylinder after manually disconnecting the connection between the top supporting seat and the top hydraulic cylinder, and then a new inner frame is installed in the outer frame, and the roll replacement work is completed.
[0048] In an alternative embodiment of the present application, the fixed base 40 comprises at least two spaced apart guide rails 41, which are arranged horizontally and perpendicularly to the center line of the hot rolling mill. The centering frame 30 is arranged on the guide rails 41 and can move reciprocally along the guide rails 41 under the drive of the frame deviation rectifying mechanism 50.
[0049] In an alternative example of this embodiment, the bottom of the centering frame 30 is rotatably mounted with a roller 31, which is in rolling engagement with the guide rails 41.
[0050] In another alternative example of this embodiment, the guide rails 41 are sliding rails, which are in sliding engagement with the centering frame 30.
[0051] In an alternative embodiment of the present application, the frame deviation rectifying mechanism 50 is a hydraulic servo mechanism or an electric servo mechanism. The centering frame 30 is driven by the hydraulic (electric) servo mechanism to move on the plane, thereby driving the box body 10 to realize the accurate swinging (moving) of the box body 10. The friction force of the pinch roll 21 acts on the strip, and the strip is rectified in the running through the entry roll 70, the roll table 60 and the exit roll 80.
[0052] In an alternative example of the present application, the hot rolling mill is a thin strip casting and rolling hot rolling mill.
[0053] The detailed explanations of the above embodiments are only for the purpose of explaining the present application, so as to better understand the present application. However, these descriptions cannot be interpreted as the limitation of the present application for any reason. In particular, the features described in different embodiments can be combined with each other arbitrarily, thereby forming other embodiments. Except for the explicit opposite description, these features should be understood as applicable to any one of the embodiments, rather than limited to the described embodiments.
Claims
1. An insulation box for a hot rolling mill, disposed at the inlet of the hot rolling mill, characterized in that, The insulation box includes a box body, a pinch roller mechanism, a centering frame, a fixed base, and a frame correction mechanism. The box body has an insulation cavity that runs through the center line of the hot rolling mill. The pinch roller mechanism has at least one pair of pinch rollers disposed in the insulation cavity. The box body is fixed on the centering frame, the centering frame is disposed on the fixed base, and the frame correction mechanism is connected to the centering frame and can drive the centering frame to move left and right on the fixed base. The insulation cavity is also equipped with a roller conveyor, which is located between the pinch roll and the entrance of the insulation cavity along the center line of the hot rolling mill.
2. The insulation box for a hot rolling mill as described in claim 1, characterized in that, The insulation cavity is equipped with a manifold, through which inert gas is blown into the insulation cavity.
3. The insulation box for a hot rolling mill as described in claim 1, characterized in that, The inner walls of the box body are all water-cooled panels.
4. The insulation box for a hot rolling mill as described in claim 1, characterized in that, An inlet roller is also provided inside the insulation cavity, and the inlet roller is located at the end of the roller conveyor away from the pinch roller.
5. The insulation box for a hot rolling mill as described in claim 1, characterized in that, The pinch roller mechanism further includes an inner frame and an outer frame. The outer frame is fixedly connected to the centering frame and located outside the box body. One end of the inner frame is located inside the insulation cavity, and the other end of the inner frame is sealed through the box body and fixedly connected to the outer frame. A pair of pinch rollers are rotatably mounted on the inner frame.
6. The insulation box for a hot rolling mill as described in claim 5, characterized in that, The inner frame is also equipped with a pinch roller correction device that can adjust the position of the pinch roller.
7. The insulation box for a hot rolling mill as described in claim 1, characterized in that, The fixed base includes two spaced guide rails, which are horizontally arranged and perpendicular to the center line of the hot rolling mill. The centering frame is mounted on the two guide rails and can reciprocate along the guide rails under the drive of the frame correction mechanism.
8. The insulation box for a hot rolling mill as described in claim 7, characterized in that, The centering frame is rotatably mounted with rollers at its bottom, and the rollers are in rolling engagement with the guide rail.
9. The insulation box for a hot rolling mill as described in claim 1, characterized in that, The frame correction mechanism is a hydraulic servo mechanism or an electric servo mechanism.
Citation Information
Patent Citations
Heating furnace steel belt automatic deviation rectifying device and control system
CN114294948A