Roller shutter door for closed rolling mill

Abstract

The embodiment of the utility model provides a roller shutter door for a closed type rolling mill. The roller shutter door comprises a reel support connected to the side wall of a rolling mill rack, a reel hinged to the reel support, a roller shutter wound on the reel and a driving device connected to the upper portion of a top plate of the rolling mill rack. The reel support, the reel and the roller shutter are all located on the inner side of the rolling mill frame, and the driving device is located on the outer side of the rolling mill frame. The output end of the driving device is connected with a first chain wheel, the input end of the reel is connected with a second chain wheel, the first chain wheel is located over the second chain wheel, and the first chain wheel and the second chain wheel are connected through a chain. According to the technical scheme, the roller shutter door arranged on the rolling mill rack is automatically opened and closed instead of a traditional manual opening and closing mode, so that the labor intensity is greatly reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of steel production technology, and more particularly to a roller shutter door, and more specifically, a roller shutter door for a closed rolling mill. Background Technology

[0002] Rolling mill units (such as the 1550 pickling mill unit) are typically housed in a building-like structure to enclose and protect the mill. Within the mill stand, a door-like opening is usually provided for observation of equipment, personnel access, and maintenance (such as replacing work rolls or support rolls), with a roller shutter door installed at the opening for privacy. Existing roller shutter doors are all manually operated; when access to the mill stand is required, the door is pushed up, and after the operation is completed, it is lowered.

[0003] In the process of realizing this utility model, the inventors discovered that the prior art has at least the following problems:

[0004] Operating the roller shutter door in a current-type enclosed rolling mill is labor-intensive, requiring two operators to use pry bars to open it. This results in high labor intensity and reduced work efficiency. Therefore, finding a way to easily open and close the roller shutter door to improve work efficiency is a problem that needs to be solved. Utility Model Content

[0005] This utility model provides a roller shutter door for enclosed rolling mills, which solves the problems of difficult operation and high labor intensity of existing roller shutter doors for enclosed rolling mills.

[0006] To achieve the above objectives, this utility model provides a roller shutter door for an enclosed rolling mill, comprising: a roller support connected to the side wall of the rolling mill frame, a roller hinged to the roller support, a roller shutter wound on the roller, and a drive device connected above the top plate of the rolling mill frame; the roller support, roller, and roller shutter are all located inside the rolling mill frame, and the drive device is located outside the rolling mill frame; the output end of the drive device is connected to a first sprocket, the input end of the roller is connected to a second sprocket, the first sprocket is located directly above the second sprocket, and the first sprocket and the second sprocket are connected by a chain; a through hole is provided on the top plate, and the chain passes through the through hole vertically.

[0007] Furthermore, the drive unit is a geared motor.

[0008] Furthermore, an insulation layer is installed between the top plate and the drive unit.

[0009] Furthermore, a temperature sensor and a fan are installed above the top plate, with the fan blowing in the direction of the drive unit.

[0010] Furthermore, the roller shutter door for the enclosed rolling mill also includes a vertically arranged guide rail, with a guide groove in the middle of the guide rail for limiting the roller shutter; the guide rail is fixedly connected to the mounting angle steel, and the mounting angle steel is detachably connected to the rolling mill frame.

[0011] Furthermore, the fan is an axial fan, with the fan's axis of rotation parallel to the axis of rotation of the drive unit.

[0012] Furthermore, the geared motor is an explosion-proof motor.

[0013] Furthermore, the roller shutter door weighs 200kg, has a roller diameter of 160mm, a lifting speed of 0.3m / s, and uses an explosion-proof motor model of WJBB1000-3P.

[0014] Furthermore, the lower limit position of the roller shutter is 50mm below the upper surface of the moving cover plate of the rolling mill.

[0015] The above technical solution has the following beneficial effects:

[0016] The technical solution of this utility model changes the traditional manual opening and closing method of the roller shutter door configured on the rolling mill stand to an automatic one. Furthermore, by placing the motor on the outside of the stand, the motor can be protected from high temperature. This design greatly reduces labor intensity and improves work efficiency.

[0017] In addition, this technical solution also has the following characteristics:

[0018] 1) In the prior art, manual opening often requires the use of a pry bar to push and pull. However, roller shutters are made of thin aluminum alloy material with low strength. Therefore, during use, the intervention of the pry bar can easily cause uneven force on the roller shutter and thus deformation, resulting in damage to the roller shutter. With the adoption of this application, since the roller shutter can be opened with one button and is driven by a motor or other drive device, the force is balanced, thus improving the service life of the roller shutter.

[0019] 2) When the roller shutter door is opened, the guide rail groove is easily subjected to compressive force and needs to be replaced regularly. However, the guide rail is usually directly welded to the rolling mill frame on the side of the roller shutter door, making it difficult to replace. With this solution, the guide rail is detachably connected to the rolling mill frame by installing angle steel (e.g., bolt connection), which facilitates regular replacement. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a roller shutter door for a closed rolling mill according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a roller shutter door for a closed rolling mill from another angle according to an embodiment of the present invention;

[0023] Figure 3 This is a diagram showing the positional relationship between the lower limit position of the roller shutter and the moving cover plate of the rolling mill in this embodiment of the present invention.

[0024] Reference numerals: 1. Top plate; 2. Drive unit; 3. Chain; 4. Roller; 5. Roller shutter; 6. Roller support; 7. Guide rail; 8. Fan; 9. Roller mill moving cover plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1 , Figure 2 As shown, this utility model embodiment provides a roller shutter door for an enclosed rolling mill, comprising: a roller support 6 connected to the side wall of the rolling mill frame, a roller 4 hinged to the roller support 6, a roller shutter 5 wound on the roller 4, and a drive device 2 connected above the top plate 1 of the rolling mill frame; the roller support 6, the roller 4, and the roller shutter 5 are all located inside the rolling mill frame, and the drive device 2 is located outside the rolling mill frame; the output end of the drive device 2 is connected to a first sprocket, the input end of the roller 4 is connected to a second sprocket, the first sprocket is located directly above the second sprocket, and the first sprocket and the second sprocket are connected by a chain 3; a through hole is provided on the top plate 1, and the chain 3 passes through the through hole vertically.

[0027] To address the aforementioned issues, this application proposes using a drive device 2 to rotate the roller 4, thereby controlling the raising and lowering of the roller shutter 5 and achieving automated operation. However, due to limitations imposed by site conditions, existing roller shutters require installation inside the rolling mill frame. If a standard electric roller shutter is used, the drive device (e.g., a motor) and roller support 6 must also be installed inside the frame. Since the roller shutter is closed during rolling mill production, the internal temperature of the rolling mill frame reaches approximately 60°C, and the emulsion produces significant mist, creating a humid environment. The motor struggles to operate under such harsh conditions, easily leading to motor damage. Therefore, this technical solution, considering the actual site conditions, improves the electric roller shutter by installing the roller support 6 on the inner side wall of the rolling mill frame (e.g., ...). Figure 3 As shown, the roller support 6 can be two parallel plate-like structures connected to the side of the mill opening. The axis of the roller 4 is perpendicular to the plate surface of the plate-like structure. Both ends of the roller 4 are hinged to the corresponding plate-like structures through bearings. Alternatively, a skin can be provided on the outside of the plate-like structure to form a roller shutter cover, thus providing some protection for the retracted roller shutter 5. Correspondingly, the roller 4, roller shutter 5, etc. are also located inside the mill frame. The drive device 2 is separated from the roller 4 (in existing ordinary electric roller shutters, the drive device 2 and roller 4 are coaxially arranged), and the drive device 2 is moved up to the top plate 1 of the mill frame. That is, at this time, the drive device 2 is located outside the mill frame, thus avoiding the influence of high temperature and maintaining long-term operation. At this time, there is a height difference between the output end of the drive device 2 and the input end of the roller 4. Therefore, a chain drive is used to connect the two. For this purpose, a through hole can be opened on the top plate 1 between the two sprockets to accommodate the chain 3.

[0028] When the on-site operator presses the control button or handle to give a start signal to the controller (not shown in the figure), the drive device 2 drives the roller 4 to rotate in the forward or reverse direction, thereby lowering or rolling up the roller shutter 5. This method can greatly improve work efficiency.

[0029] Furthermore, to facilitate control and reduce costs, the drive device 2 is preferably a geared motor, i.e., an integrated motor and reducer.

[0030] Furthermore, in order to further reduce the impact of the high temperature inside the rolling mill stand on the drive device 2, a heat insulation layer made of non-metallic heat insulation material (such as rock wool) can be provided between the top plate 1 and the drive device 2.

[0031] Furthermore, although the stand-alone unit usually has a built-in fan at the rear, its heat dissipation capacity is limited when the ambient temperature is too high. To further prevent the motor temperature from getting too high, a temperature sensor and a fan 8 are also installed above the top plate 1. The blowing direction of the fan 8 is towards the drive device 2. The temperature sensor will detect the ambient temperature around the stand-alone unit. When the ambient temperature exceeds the preset value, the controller will send a start signal to the fan 8 to assist the stand-alone unit in cooling down.

[0032] Furthermore, the roller shutter door for the enclosed rolling mill also includes a vertically arranged guide rail 7, the guide rail 7 having a guide groove in the middle for limiting the movement of the roller shutter 5; the guide rail 7 is fixedly connected to a mounting angle steel, and the mounting angle steel is detachably connected to the rolling mill frame. Existing guide rails are usually directly welded to the rolling mill frame on the side of the roller shutter door, making replacement difficult. By using a mounting angle steel to achieve a detachable connection (e.g., bolted connection) with the rolling mill frame, periodic replacement is facilitated.

[0033] Furthermore, fan 8 is preferably an axial flow fan, the most widely used type in industrial applications. In use, fan 8 can be configured according to actual needs, such as having its shaft parallel to the shaft of drive unit 2 (i.e., both are in a straight line along the axial direction). This saves space in the direction perpendicular to the axis, and cooling is achieved along the length of the motor's circumference; alternatively... Figure 2 As shown, the shaft of fan 8 is perpendicular to the shaft of drive unit 2, which allows for cooling of the motor end. In one specific embodiment, it is preferable that the two are parallel to each other.

[0034] Furthermore, due to the high requirements of environmental factors for motors, the motors must have explosion-proof functions, and the geared motors must be explosion-proof motors.

[0035] In one specific embodiment, the dimensions (length × width) of the frame opening are 4918mm × 2160mm, the dimensions (length × width) of the roller shutter door are 5300mm × 2100mm, and the vertical distance between the first sprocket and the second sprocket is 1500mm.

[0036] The required motor parameters are as follows: the roller blind 5 weighs about 200kg, the roller 4 has a diameter of about 160mm, and the lifting speed is 0.3m / s.

[0037] Torque T = M·g·r = 200 × 9.8 × 0.08 = 157 N·m

[0038] Rotational speed N = V / (π·D) × 60 = 0.3 / (3.14 × 0.16) × 60 = 35.8 rpm

[0039] Output H = 2π / 60·T·N = 2 × 3.14 / 60 × 157 × 35.8 = 588W

[0040] Based on the above data, the explosion-proof motor model selected is: WJBB1000-3P

[0041] In this specific embodiment, the modified roller shutter door is expected to have a service life of more than 5 years, and can save about 10 hours of downtime for replacing the roller shutter door each year, greatly improving production efficiency.

[0042] Furthermore, in the existing technology, the lowered position of the manual roller shutter door contacts the surface of the rolling mill moving cover plate 9. During production, emulsion can easily splash out from the bottom contact gap of the roller shutter door, polluting the on-site environment. Therefore, this specific embodiment also modifies the connection between the roller shutter 5 and the rolling mill moving cover plate 9, such as... Figure 3 As shown, the roller shutter 5 is lowered to a position 50mm below the upper surface of the rolling mill moving cover plate 9, thereby improving the sealing effect of the roller shutter door on the rolling mill. At this time, the emulsion baffle curtain inside the rolling mill stand can be removed.

[0043] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0044] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use this invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0045] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A roller shutter door for an enclosed rolling mill, characterized in that, include: A reel bracket (6) is connected to the side wall of the mill stand, a reel (4) is hinged to the reel bracket (6), a roller blind (5) is wound on the reel (4), and a drive device (2) is connected above the top plate (1) of the mill stand; the reel bracket (6), the reel (4), and the roller blind (5) are all located inside the mill stand, and the drive device (2) is located outside the mill stand; the output end of the drive device (2) is connected to a first sprocket, the input end of the reel (4) is connected to a second sprocket, the first sprocket is located directly above the second sprocket, and the first sprocket and the second sprocket are connected by a chain (3); a through hole is provided on the top plate (1), and the chain (3) passes through the through hole from top to bottom.

2. The roller shutter door for a closed rolling mill as described in claim 1, characterized in that, The drive device (2) is a geared motor.

3. The roller shutter door for a closed rolling mill as described in claim 1, characterized in that, A heat insulation layer is also provided between the top plate (1) and the driving device (2).

4. The roller shutter door for an enclosed rolling mill as described in claim 1, characterized in that, A temperature sensor and a fan (8) are also provided above the top plate (1), and the blowing direction of the fan (8) is towards the drive device (2).

5. The roller shutter door for an enclosed rolling mill as described in claim 1, characterized in that, It also includes a vertically arranged guide rail (7), the middle of which is provided with a guide groove for limiting the roller shutter (5); the guide rail (7) is fixedly connected to the mounting angle steel, and the mounting angle steel is detachably connected to the mill frame.

6. The roller shutter door for an enclosed rolling mill as described in claim 4, characterized in that, The fan (8) is an axial flow fan, and the rotating shaft of the fan (8) is parallel to the rotating shaft of the drive device (2).

7. The roller shutter door for an enclosed rolling mill as described in claim 2, characterized in that, The geared motor is an explosion-proof motor.

8. The roller shutter door for an enclosed rolling mill as described in claim 7, characterized in that, The roller shutter door weighs 200kg, the roller (4) has a diameter of 160mm, the lifting speed is 0.3m / s, and the explosion-proof motor model is WJBB1000-3P.

9. The roller shutter door for a closed rolling mill as described in claim 1, characterized in that, The lower limit position of the roller shutter (5) is 50mm lower than the upper surface of the rolling mill moving cover plate (9).

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