Gap slag stopping device and medium plate four-roller mill

Abstract

The utility model relates to the technical field of heavy and medium plate rolling mill equipment, in particular to a clearance slag stopping device and a heavy and medium plate four-high rolling mill, the clearance slag stopping device is applied between a lower supporting roll seat of a rolling mill and a rolling mill housing to isolate and guide out impurities, and the clearance slag stopping device comprises a slag stopping device base and a U-shaped water guide groove, the slag stopping device base is connected to a lower supporting roller seat of the rolling mill, one end of the bottom face of the U-shaped water guide groove is hinged to the slag stopping device base, the other end of the bottom face of the U-shaped water guide groove is connected with the slag stopping device base through an adjusting mechanism, so that the U-shaped water guide groove inclines on the slag stopping device base, and the two edges of the U-shaped water guide groove make contact with the lower supporting roller seat of the rolling mill and a rolling mill housing respectively. According to the utility model, the U-shaped gutter with gradient and adjustable gradient is utilized, so that the device is mounted in place when an operator replaces the supporting roll every time, and the problem that foreign matters enter a gap between the lower supporting roll and a rolling mill housing can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medium and thick plate rolling mill equipment, in particular to a gap slag blocking device and a medium and thick plate four-roller rolling mill. Background Art

[0002] The medium and thick plate mill refers to the rolling equipment used for rolling medium and thick steel plates. Every time the working roll and the supporting roll are replaced, there are different degrees of blocking in the process of the lower supporting roll descending to the "zero position", especially when the lower supporting roll is replaced, the roll changing trolley is frequently blocked and forced to stop and trip, which seriously affects the roll changing speed and causes serious equipment damage to the mill arch and the roll changing trolley motor. Through continuous tracking and cause investigation on the site, it was found that foreign objects such as iron oxide scale, burrs, cutting slag and sewage were stuck between the supporting roll and the arch, resulting in increased friction between the supporting roll and the arch, and the nozzle of the dry oil lubrication system was blocked and did not work, which aggravated the difficulty of pulling out and pushing in the supporting roll. At the same time, the entry of impurities such as iron oxide scale and sewage accelerated the wear and corrosion of the contact surface between the mill arch and the lower supporting roll. The roll gap swing is often blocked or not in place during the rolling process, which has a great impact on the smooth production and the thickness control accuracy of the rolled product.

[0003] Therefore, in order to solve the problem of impurities entering between the lower support roll and the mill housing of a medium and thick plate four-roller rolling mill, the utility model proposes a gap slag blocking device and a medium and thick plate four-roller rolling mill. Utility Model Content

[0004] The utility model aims at the above-mentioned technical problems, overcomes the shortcomings of the prior art, and provides a gap slag blocking device and a four-roller rolling mill for medium and thick plates, which can effectively remove scale from the rolling mill and foreign matter such as oxidized iron scale, cutting slag, burrs, etc. during the rolling process, and flush them to the outside of the rolling mill through the U-shaped water diversion trough. At the same time, the flat scraper plate blocks the missed part outside the gap, maintaining the inside of the gap between the rolling mill arch and the lower supporting roller in a relatively closed space, thereby ensuring the normal operation of the dry oil lubrication system and improving the movement accuracy of the up and down movement and lateral withdrawal of the lower supporting roller.

[0005] In the first aspect, the gap slag blocking device provided by the present invention is applied between the lower support roller seat of the rolling mill and the rolling mill arch to isolate and guide out impurities, and the gap slag blocking device comprises:

[0006] The slag blocking device base is connected to the lower support roller seat of the rolling mill;

[0007] The U-shaped water diversion trough has one end of its bottom surface hinged on the slag blocking device base, and the other end is connected to the slag blocking device base through an adjusting mechanism, so that the U-shaped water diversion trough is tilted on the slag blocking device base, and the two edges of the U-shaped water diversion trough respectively contact the lower supporting roller seat of the rolling mill and the rolling mill arch, so that impurities in the gap between the lower supporting roller seat of the rolling mill and the rolling mill arch are discharged through the inclined U-shaped water diversion trough.

[0008] The technical solution further defined in the first aspect of the utility model is:

[0009] Furthermore, the adjusting mechanism includes a lifting screw, a lifting nut and a sleeve adapted therewith. The lifting screw is rotatably connected to the U-shaped water diversion trough through a rotating head. The lifting nut is threadedly connected to the external thread of the lifting screw. The end of the lifting screw away from the rotating head is slidingly fitted in the sleeve. The bottom of the lifting nut abuts against the sleeve so that the reaction force when the lifting nut rotates realizes the lifting screw to move upward. By adjusting the forward and reverse rotation of the lifting nut, the lifting screw is lifted and lowered in the sleeve to achieve the purpose of adjusting the slope of the U-shaped water diversion trough. The bottom of the sleeve is fixedly connected to the base of the slag blocking device.

[0010] Furthermore, the bottom of the U-shaped water diversion trough is connected to the slag blocking device bracket through water diversion trough fixing screws, one end of the bottom surface of the slag blocking device bracket is hinged to the slag blocking device base, and the other end is connected to the slag blocking device base through an adjustment mechanism.

[0011] Furthermore, it also includes a flat scraper plate connected to the base of the slag blocking device, the flat scraper plate is located below the U-shaped water diversion trough, and the two side edges of the flat scraper plate also contact the lower supporting roller seat of the rolling mill and the rolling mill archway respectively.

[0012] Furthermore, the flat scraper plate and the slag blocking device base are parallel to each other, overlapped and connected to the lower supporting roller seat of the rolling mill.

[0013] Furthermore, the flat scraper plate and the slag blocking device base are connected to the lower supporting roller seat of the rolling mill through the slag blocking device base fixing bolts, and the lower supporting roller seat of the rolling mill is provided with a slag blocking device fixing nut seat that is compatible with the slag blocking device base fixing bolts.

[0014] Furthermore, the flat scraper plate is made of rubber.

[0015] In a second aspect, the utility model provides a four-roller rolling mill for medium and thick plates, which has a gap slag blocking device as described in any scheme in the first aspect, and the gap slag blocking device is located between the lower support roller seat of the rolling mill and the rolling mill arch.

[0016] The beneficial effects of the utility model are:

[0017] (1) The utility model adopts reasonable design, and the gap slag blocking device has a U-shaped water diversion trough with an adjustable slope. The operator installs the device in place during each support roller replacement operation, which can effectively solve the problem of foreign matter entering the gap between the lower support roller and the rolling mill arch;

[0018] (2) The utility model provides two slag blocking lines, namely, a U-shaped water diversion trough and a flat slag scraper plate, which can effectively remove scale from the rolling mill and flush foreign matter such as oxidized iron scale, cutting slag, burrs, etc. during the rolling process to the outside of the rolling mill through the U-shaped water diversion trough. At the same time, the flat slag scraper plate blocks the missed part outside the gap, maintaining the gap between the rolling mill arch and the lower support roller in a relatively closed space, thereby ensuring the normal operation of the dry oil lubrication system and improving the accuracy of the up and down movement and lateral withdrawal of the lower support roller;

[0019] (3) The utility model reduces the wear on the archway and the loss of the roller-changing trolley, while improving the thickness control accuracy of the rolled piece and the comprehensive maintenance accuracy of the equipment, thereby enhancing the core competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the gap slag blocking device of Example 1 of the utility model when it is applied between the lower support roller seat of a rolling mill and the rolling mill archway;

[0021] Figure 2 This is a schematic diagram of the structure of the gap slag blocking device of Example 1 of the utility model when it is installed on the lower support roller seat of the rolling mill;

[0022] Figure 3 This is a schematic structural diagram of the U-shaped water diversion trough and the slag blocking device bracket when they are connected in Example 1 of the utility model;

[0023] Figure 4 It is a schematic diagram of the position of the gap slag blocking device of the utility model installed on the lower support roll seat of the medium and thick plate four-roller rolling mill;

[0024] In the figure: 1. Base of slag blocking device; 2. Flat slag scraper; 3. Fixing bolts of base of slag blocking device; 4. Fixing nut seat of slag blocking device; 5. Rolling mill arch; 6. Lower working roll seat of rolling mill; 7. Lower support roll seat of rolling mill;

[0025] 1-1, lifting screw; 1-2, lifting nut; 1-3, rotating head; 1-4, U-shaped water diversion trough; 1-5, water diversion trough fixing screw; 1-6, slag blocking device bracket; 1-7, sleeve. DETAILED DESCRIPTION Example 1

[0026] This embodiment provides a slag blocking device between the lower support roller and the mill arch of a medium and thick plate four-roller rolling mill, which is applied between the lower support roller seat 7 of the rolling mill and the mill arch 5 to isolate and guide out impurities. The lower working roll seat 6 of the rolling mill is located above the lower support roller seat 7 of the rolling mill. Figure 4 As shown, there is a lower support roller between the two lower support roller seats 7 of the rolling mill. When replacing the support roller, it is necessary to Figure 4 The device shown enters and exits the mill housing 5 transversely, see Figure 1The left and right sides are the rolling mill arch 5, and there is a certain gap between the rolling mill arch 5 and the two sides of the lower supporting roller seat 7 of the rolling mill. In this embodiment, four gap slag blocking devices are used to isolate and guide out impurities from above.

[0027] like Figure 1-2 As shown, the gap slag blocking device provided in this embodiment includes a slag blocking device base 1 and a U-shaped water diversion trough 1-4, the slag blocking device base 1 is connected to the lower support roller seat 7 of the rolling mill, one end of the bottom surface of the U-shaped water diversion trough 1-4 is hinged on the slag blocking device base 1, and the other end is connected to the slag blocking device base 1 through an adjustment mechanism, so that the U-shaped water diversion trough 1-4 is inclined on the slag blocking device base 1, and the two edges of the U-shaped water diversion trough 1-4 contact the lower support roller seat 7 of the rolling mill and the rolling mill arch 5 respectively, so that the gap impurities between the lower support roller seat 7 of the rolling mill and the rolling mill arch 5 are guided by the inclined U-shaped water diversion trough 1-4 The adjusting mechanism includes a lifting screw 1-1, a lifting nut 1-2 and a sleeve 1-7 adapted thereto. The lifting screw 1-1 is rotatably connected to the U-shaped water diversion trough 1-4 through a rotating head 1-3. The lifting nut 1-2 is threadedly connected to the external thread of the lifting screw 1-1. The end of the lifting screw 1-1 away from the rotating head 1-3 is slidably fitted in the sleeve 1-7. The bottom of the lifting nut 1-2 abuts against the sleeve 1-7 so that the reaction force when the lifting nut 1-2 rotates realizes the lifting screw 1-1 to move upward. The sleeve 1-7 is fixedly connected to the base 1 of the slag blocking device.

[0028] In this embodiment, the gap slag blocking device also includes a flat scraper plate 2 connected to the slag blocking device base 1, which is made of rubber. The flat scraper plate 2 is located below the U-shaped water diversion trough 1-4, and the two side edges of the flat scraper plate 2 also contact the lower support roller seat 7 of the rolling mill and the rolling mill arch 5 respectively. The bottom of the U-shaped water diversion trough 1-4 is connected to a slag blocking device bracket 1-6 through a water diversion trough fixing screw 1-5. One end of the bottom surface of the slag blocking device bracket 1-6 is hinged on the slag blocking device base 1, and the other end is connected to the slag blocking device base 1 through the aforementioned adjustment mechanism. Figure 3 It is a schematic diagram of the U-shaped water diversion channel 1-4 from an upper perspective.

[0029] Specifically, the flat scraper plate 2 and the slag blocking device base 1 are stacked parallel to each other, and are horizontally connected to the lower supporting roller seat 7 of the rolling mill through the slag blocking device base fixing bolts 3, and the lower supporting roller seat 7 of the rolling mill is provided with a slag blocking device fixing nut seat 4 that is compatible with the slag blocking device base fixing bolts 3.

[0030] The assembly process of this embodiment is as follows: ① When the support roller is replaced, the four gap slag blocking devices of this embodiment are pressed Figure 1As shown, it is installed at the corresponding position of the new lower supporting roller seat 7 of the rolling mill; ②, during installation, place the flat scraper plate 2 under the base 1 of the slag blocking device to ensure that one side of the flat scraper plate 2 is in close contact with the inner wall of the rolling mill arch 5, and is fixed by the fixing bolts 3 of the slag blocking device base; ③, one side of the U-shaped water diversion trough 1-4 is close to the rolling mill arch 5, and the other side is close to the outer wall of the lower supporting roller seat 7 of the rolling mill, and is connected to the slag blocking device bracket 1-6 through the water diversion trough fixing screws 1-5. ④, adjust the slope of the bracket to the appropriate slope through the lifting screw 1-1, and fix it. ⑤, push the lower supporting roller seat 7 of the rolling mill with the gap slag blocking device installed into the rolling mill. After it is in place, pay attention to check the status of the U-shaped water diversion trough 1-4. If there is any change, manually adjust it to the state of step ③.

[0031] This embodiment is mainly used for blocking slag in the gap between the lower support roller and the mill arch of a four-roll hot-rolled medium and thick plate mill. Each time the support roller is replaced, there is a different degree of blocking when the lower support roller is lowered to the "zero position" and pulled out, especially when the lower support roller is pulled out, the roll-changing trolley is frequently blocked and forced to stop and trip, which seriously affects the roll-changing speed and causes serious equipment damage to the mill arch and the roll-changing trolley motor. Through the application of this embodiment, the dual functions of the U-shaped water diversion trough and the flat scraper plate can be used to effectively reduce the foreign matter flushed by the roller cooling water into the gap between the arch and the support roller, ensuring a good working environment of the dry oil lubrication system inside the gap, making the lower support roller move up and down and pull out smoothly, effectively ensuring the motion control accuracy of the equipment and reducing the loss of the mill arch and the roll-changing trolley.

[0032] This embodiment adopts the design concept of matching the bracket, the U-shaped water diversion trough with a slope and the flat scraper plate to each other, providing the operator with a simple, effective and fast lower support roller slag blocking device, which has a simple operation method and structure and is easy to maintain, greatly reducing the influence of foreign matter entering the gap between the rolling mill arches on the control accuracy of the support roller movement, improving the thickness control accuracy of the rolling mill and the controllability of the movement, and reducing the damage to the rolling mill arch and the roll changing trolley during the roll withdrawal operation. Example 2

[0033] This embodiment provides a medium and thick plate four-roller rolling mill, which is equipped with the gap slag blocking device provided in Example 1.

[0034] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A gap slag blocking device, characterized in that: It is used between the lower support roller seat of the rolling mill and the rolling mill archway to isolate and guide out impurities. The gap slag blocking device includes: A slag blocking device base (1) is connected to the lower support roller seat of the rolling mill; A U-shaped water diversion trough (1-4) has one end of its bottom surface hinged on the slag blocking device base (1), and the other end is connected to the slag blocking device base (1) through an adjustment mechanism, so that the U-shaped water diversion trough (1-4) is tilted on the slag blocking device base (1), and two edges of the U-shaped water diversion trough (1-4) contact the lower support roller seat of the rolling mill and the rolling mill arch respectively, so that impurities in the gap between the lower support roller seat of the rolling mill and the rolling mill arch are discharged through the tilted U-shaped water diversion trough (1-4).

2. The gap slag blocking device according to claim 1, characterized in that: The adjustment mechanism comprises a lifting screw (1-1), a lifting nut (1-2) matched therewith, and a sleeve (1-7); the lifting screw (1-1) is rotatably connected to the U-shaped water diversion trough (1-4) via a rotating head (1-3); the lifting nut (1-2) is threadedly connected to the external thread of the lifting screw (1-1); one end of the lifting screw (1-1) away from the rotating head (1-3) is slidably fitted in the sleeve (1-7); the bottom of the lifting nut (1-2) abuts against the sleeve (1-7) so that the reaction force when the lifting nut (1-2) rotates realizes the lifting screw (1-1) to move upward; and the sleeve (1-7) is fixedly connected to the slag blocking device base (1).

3. The gap slag blocking device according to claim 1, characterized in that: The bottom of the U-shaped water diversion trough (1-4) is connected to a slag blocking device bracket (1-6) via a water diversion trough fixing screw (1-5); one end of the bottom surface of the slag blocking device bracket (1-6) is hinged on the slag blocking device base (1), and the other end is connected to the slag blocking device base (1) via an adjustment mechanism.

4. The gap slag blocking device according to claim 1, characterized in that: It also includes a flat scraper plate (2) connected to the slag blocking device base (1), the flat scraper plate (2) is located below the U-shaped water diversion trough (1-4), and the two side edges of the flat scraper plate (2) also contact the lower support roller seat of the rolling mill and the rolling mill archway respectively.

5. The gap slag blocking device according to claim 4, characterized in that: The flat scraper plate (2) and the slag blocking device base (1) are parallel to each other and are superimposed and connected to the lower support roller seat of the rolling mill.

6. The gap slag blocking device according to claim 5, characterized in that: The flat scraper plate (2) and the slag blocking device base (1) are connected to the lower support roller seat of the rolling mill via the slag blocking device base fixing bolts (3), and the lower support roller seat of the rolling mill is provided with a slag blocking device fixing nut seat (4) that matches the slag blocking device base fixing bolts (3).

7. The gap slag blocking device according to claim 4, characterized in that: The flat scraper plate (2) is made of rubber.

8. A four-roller mill for medium and thick plates, characterized in that: A gap slag blocking device as described in any one of claims 1 to 7.

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