A water receiving device for cooling water of a rotary drum flying shear blade of a hot rolling plate strip rolling mill

Abstract

The utility model relates to flying shear cutting edge cooling water receiving technology field, concretely refers to a hot strip mill drum type flying shear cutting edge cooling water receiving device, including a pair of 7 shape pin shafts, a pair of 7 shape pin shafts are fixed in the opposite two sides in the frame respectively, and the water receiving structure is hung between a pair of 7 shape pin shafts, and the water receiving structure includes the lug hung in the one end of 7 shape pin shaft, and the lug bottom end is fixed with the water receiving plate. The utility model solves the problem that the existing flying shear cutting edge cooling water is in the form of water shower, causes the local supercooling of the surface of the rolled piece, the temperature is uneven, influences the rolling stability, and increases the edge crack risk.

Description

Technical Field

[0001] This utility model relates to the field of cooling water collection technology for flying shear blades, specifically to a cooling water collection device for the blades of a rotary flying shear in a hot-rolled strip mill. Background Technology

[0002] The head and tail shears of the hot-rolled strip mill are located before the finishing descaling mill and are equipped with a rotary drum flying shear and a head-cutting flying shear. This invention is mainly designed for the rotary drum head-cutting flying shear. The rotary drum head-cutting flying shear consists of a transmission device, a frame body, a shearing mechanism, a shear blade gap adjustment device, a shear blade replacement device, and cooling and lubrication devices. When cutting the head, the shear blade speed should be synchronized with the speed of the roller table in front of the flying shear (i.e., the running speed of the plate). When cutting the tail, the shear blade speed should be synchronized with the speed of the F1 mill rolls. The upper and lower shear blades of the flying shear are cooled by water spray. Because the rolling rhythm is fast, when the shear blade cooling is done intermittently (i.e., cooling stops when passing through the steel and water spray is used during the interval), the interval is very short, and the shear blade cooling is not sufficient, which affects the shear blade life. At present, the shear blade cooling is done by continuous water spray, which can cool the shear blade fully; however, when passing through the steel, the cooling water of the shear blade will fall onto the surface of the steel plate in a water droplet pattern.

[0003] The following problems exist with the cooling water for the flying shear blades during use:

[0004] 1. The cooling water from the shear blades falls onto the surface of the rolled piece in a spray-like manner, causing localized overcooling on the surface of the rolled piece. This results in uneven temperatures on the horizontal and vertical sides of the billet surface, affecting the stability of the rolling process.

[0005] 2. When the rolled piece is in a high-temperature environment, the cooling water from the shear blade drips onto the surface of the high-temperature rolled piece, which will cause the edge of the rolled piece to cool rapidly, resulting in thermal stress concentration, thereby increasing the risk of edge cracks in the rolled piece. Utility Model Content

[0006] The technical problem this invention aims to solve is that the cooling water of the existing flying shear blades is in a water spray pattern, which causes localized overcooling and uneven temperature on the surface of the rolled workpiece, affecting rolling stability and increasing the risk of edge cracks.

[0007] To solve the above problems, the technical solution adopted by this utility model is a cooling water receiving device for the blade of a rotary flying shear in a hot-rolled strip mill. It includes a pair of 7-shaped pins, which are fixed on opposite sides inside the frame. A water receiving structure is hung between the pair of 7-shaped pins. The water receiving structure includes a hanging ear hung on one end of the 7-shaped pin, and a water receiving plate is fixed at the bottom end of the hanging ear.

[0008] As a further embodiment of this utility model, both ends of the water receiving plate have a raised structure to facilitate the collection of cooling water.

[0009] As a further embodiment of this utility model: a baffle is fixed on the inner side of the frame below the water receiving plate to provide support.

[0010] As a further embodiment of this utility model: a flying shear blade is provided on the inner side of the frame, and a water receiving plate is located below the cooling water droplet of the shear blade, which can prevent cooling water from dripping onto the upper side of the rolled workpiece.

[0011] Compared with the prior art, the advantages of this utility model are: this application eliminates the direct dripping of cooling water from the shear blade onto the upper surface of the red steel workpiece, avoids uneven temperature in the transverse and longitudinal directions on the upper surface of the workpiece, and prevents thermal stress concentration caused by rapid cooling at the edge of the workpiece, thereby increasing rolling stability and preventing thermal cracks at the edge of the workpiece. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram showing the installation position of the water receiving plate in the cooling water receiving device for the blades of a rotary flying shear in a hot-rolled strip mill, according to this utility model.

[0014] Figure 2 This is an enlarged view of part A of the cooling water receiving device for the blades of a rotary flying shear in a hot-rolled strip mill, according to this utility model.

[0015] Figure 3 This is a schematic diagram of the water receiving structure in the cooling water receiving device of the rotary drum flying shear blade of a hot-rolled strip mill according to the present invention.

[0016] Figure 4 This is a side view of the 7-shaped pin structure in the cooling water receiving device for the blade of a rotary flying shear in a hot-rolled strip mill according to this utility model.

[0017] Figure 5 This is a front view of the 7-shaped pin structure in the cooling water receiving device for the blade of a rotary flying shear in a hot-rolled strip mill according to this utility model.

[0018] In the attached image:

[0019] 1. 7-shaped pin; 2. Frame; 3. Hanging lug; 4. Water receiving plate; 5. Baffle; 6. Shear blade. Detailed Implementation

[0020] 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.

[0021] This utility model provides a technical solution to address the existing problems mentioned in the background art.

[0022] Combined with appendix Figure 1-5 It can be seen that it includes a pair of 7-shaped pins 1, which are fixed on opposite sides inside the frame 2. A water receiving structure is hung between the pair of 7-shaped pins 1. The water receiving structure includes a hanging ear 3 hanging on one end of the 7-shaped pin 1, and a water receiving plate 4 is fixed at the bottom of the hanging ear 3.

[0023] The water receiving plate 4 has raised structures at both ends to facilitate the collection of cooling water; a baffle 5 is fixed on the inner side of the frame 2 below the water receiving plate 4 to provide support; the inner side of the frame 2 is provided with a flying shear blade 6, and the water receiving plate 4 is located below the cooling water dripping point of the shear blade 6 to prevent cooling water from dripping onto the upper side of the rolled workpiece.

[0024] The working principle of this application is as follows: First, based on the rotation radius of the shear blade, the water receiving device must avoid the rotation range of the rotating drum shear blade;

[0025] A 7-shaped pin 1 is welded to each appropriate position on both sides of the drum frame. One end of the 7-shaped pin 1 is welded to the frame 2. The hanging ear 3 is suspended on the 7-shaped pin 1 in a hinge manner. Due to the "7" shape of the 7-shaped pin 1, the water receiving plate 4 can form a hinge structure with the 7-shaped pin 1. At the same time, the water receiving plate 4 cannot be separated from the 7-shaped pin 1.

[0026] A baffle 5 is welded to each side at another position of the drum frame 2. The other end of the water receiving plate 4 rests on the baffle 5. The water receiving plate 4 is fixed by the baffle 5 and the 7-shaped pin 1, and the water receiving plate 4 is in a horizontal position. The cooling water of the shear blade drips into the water receiving plate 4 in a water spray pattern, and then flows into the drainage ditch through both ends of the water receiving plate 4. The water receiving plate 4 can be easily disassembled and replaced manually.

[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A hot strip mill drum shear blade cooling water pickup device characterized by: It includes a pair of 7-shaped pins (1), which are fixed on opposite sides inside the frame (2). A water-receiving structure is hung between the pair of 7-shaped pins (1). The water-receiving structure includes a hanging ear (3) hung on one end of the 7-shaped pin (1), and a water-receiving plate (4) is fixed at the bottom of the hanging ear (3).

2. A water receiving device for cooling the blades of a rotary drum flying shear of a hot strip rolling mill according to claim 1, characterized in that: Both ends of the water receiving plate (4) have a raised structure.

3. A water receiving device for cooling the blades of a rotary drum flying shear of a hot strip rolling mill according to claim 1, characterized in that: The inner side of the frame (2) is fixed with a baffle (5) that abuts against the water receiving plate (4).

4. A water receiving device for cooling the blades of a rotary drum flying shear of a hot strip rolling mill according to claim 1, characterized in that: The frame (2) is provided with a flying shear blade (6) on the inner side, and the water receiving plate (4) is located below the cooling water dripping point of the shear blade (6).

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