Cooling water control device for reducing cooling speed of head temperature of rolled piece

Abstract

The utility model relates to the field of steel rolling equipment, in particular to a cooling water control device for reducing the cooling speed of the head temperature of a rolled piece, which comprises a plurality of spray water cooling units and a cooling water tank unit, and the spray water cooling units are respectively arranged in a roughing mill group, an intermediate mill group and a pre-finishing mill group. Each spraying water-cooling unit comprises a sprayer and a water inlet pipe, a first valve is arranged on each water inlet pipe, each cooling water tank unit comprises a water inlet header pipe and a plurality of water-cooling guides, each water-cooling guide is provided with a water inlet branch pipe, each water inlet branch pipe is provided with a second valve, and each water inlet branch pipe is connected with the water inlet header pipe. The device has the advantages of preventing the head of a rolled piece from being bent or layered and cracked, avoiding the defects of foreign matter press-in, pits and the like on the surface of steel, reducing steel stacking accidents and improving the yield.

Description

Technical Field

[0001] The utility model relates to the field of steel rolling equipment, in particular to a cooling water control device for reducing the cooling speed of the temperature of the head of a rolled piece. Background Art

[0002] The low-temperature rolling of steel needs to go through rough rolling, intermediate rolling, pre-finishing rolling and finishing rolling. The rolled piece needs to be cooled during rough rolling, intermediate rolling and pre-finishing rolling. Since the head and tail of the rolled piece have a larger contact surface with the air, cooling water and other media than the middle part, the cooling speed is faster, resulting in elbows or delamination and cracking, which hinders the rolled piece from entering the next process. Therefore, it is necessary to modify the cooling water control device and design a cooling water control device that can reduce the cooling speed of the temperature of the head of the rolled piece to avoid elbows or delamination and cracking of the head of the rolled piece. Summary of the invention

[0003] The utility model aims to provide a cooling water control device for reducing the cooling speed of the temperature of the head of a rolled piece, which has the advantage of avoiding elbow or delamination and cracking of the head of the rolled piece.

[0004] The technical solutions adopted are as follows:

[0005] A cooling water control device for reducing the cooling speed of the temperature of the head of a rolled piece comprises a spray water cooling unit and a cooling water tank unit. There are multiple spray water cooling units and they are respectively arranged in a rough rolling mill, an intermediate rolling mill and a pre-finishing rolling mill. The spray water cooling units each comprise a sprayer and a water inlet pipe, on which a first valve is arranged. The cooling water tank unit comprises a water inlet main pipe and multiple water cooling guides, each of which is provided with a water inlet branch pipe, each of which is provided with a second valve, and each of which is connected to the water inlet main pipe.

[0006] Preferably, first infrared sensors are provided at the entrances and exits of the roughing mill group, the intermediate rolling mill group and the pre-finishing rolling mill group.

[0007] Preferably, the water-cooled guide comprises a bracket, a guide channel is arranged in the bracket, a cavity is arranged in the bracket and is sleeved on the guide channel, a drain pipe is arranged at the upper end of the cavity, the drain pipe is connected to a water nozzle, and a liquid inlet pipe is arranged on the bracket at the lower end of the cavity.

[0008] Preferably, the water spray nozzle is arranged at the entrance of the corresponding guide channel.

[0009] Preferably, a second infrared sensor is provided at the entrance and the exit of the guide channel.

[0010] Preferably, the first valve and the second valve are both electrically controlled gate valves.

[0011] Compared with the prior art, the beneficial effects are:

[0012] In the utility model, the spray water cooling unit utilizes the first infrared sensor to sense the position of the end of the steel billet. When the end of the steel billet enters the spraying area, the first valve is temporarily closed, the sprayer temporarily stops spraying water, and the cooling speed of the end of the steel billet is slowed down. Before the steel billet enters the guide channel, the second infrared sensor senses the steel billet, and the second valve is temporarily closed, so that the water nozzle temporarily stops spraying water and the cooling speed of the end of the steel billet is slowed down, thereby avoiding the phenomenon of elbows or stratification cracking caused by the fast cooling speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a cooling water control device for reducing the cooling speed of the head temperature of a rolled piece according to the utility model.

[0014] Figure 2 yes Figure 1 The structural diagram at A in the middle,

[0015] In the figure: 1, sprinkler, 2, water inlet pipe, 3, first valve, 4, first infrared sensor, 5, water inlet branch pipe, 6, second valve, 7, water inlet main pipe, 8, bracket, 9, guide channel, 10, cavity, 11, drain pipe, 12, water nozzle, 13, liquid inlet pipe, 14, second infrared sensor. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with specific embodiments. Figure 1 to Figure 2 As shown:

[0017] Embodiment 1: A cooling water control device for reducing the cooling speed of the head temperature of a rolled piece, comprising a spray water cooling unit and a cooling water tank unit, wherein a plurality of spray water cooling units are respectively arranged in a rough rolling mill, an intermediate rolling mill and a pre-finishing rolling mill, wherein each spray water cooling unit comprises a sprayer 1 and a water inlet pipe 2, wherein a first valve 3 is arranged on the water inlet pipe 2, and the first valve 3 controls the opening and closing of the corresponding sprayer 1, and when the end of the billet enters the coverage range of the sprayer 1, the first valve 3 controls the sprayer 1 to close, thereby slowing down the cooling speed of the end of the billet,

[0018] The cooling water tank unit includes a water inlet main pipe 7 and a plurality of water cooling guides. The water cooling guides are all provided with water inlet branches 5. The water inlet branches 5 are all provided with second valves 6. The water inlet branches 5 are all connected to the water inlet main pipe 7. The second valves 6 control whether the water cooling guides supply water. When the end of the billet enters the coverage range of the water cooling guides, the second valves 6 are closed to slow down the cooling speed of the end of the billet.

[0019] Embodiment 2: A cooling water control device for reducing the cooling speed of the head temperature of a rolled piece, comprising a spray water cooling unit and a cooling water tank unit, wherein a plurality of spray water cooling units are respectively arranged in a rough rolling mill, an intermediate rolling mill and a pre-finishing rolling mill, wherein each spray water cooling unit comprises a sprayer 1 and a water inlet pipe 2, wherein a first valve 3 is arranged on the water inlet pipe 2, and the first valve 3 controls the opening and closing of the corresponding sprayer 1,

[0020] The first infrared sensor 4 is provided at the entrance and exit of the roughing mill, the intermediate rolling mill and the pre-finishing rolling mill. The first infrared sensor 4 is used to sense the position of the billet. When the end of the billet enters the coverage range of the sprayer 1, the first valve 3 controls the sprayer 1 to close, thereby slowing down the cooling speed of the end of the billet.

[0021] The cooling water tank unit includes a water inlet main pipe 7 and a plurality of water cooling guides, each of which is provided with a water inlet branch pipe 5, each of which is provided with a second valve 6, each of which is connected to the water inlet main pipe 7, and the water cooling guide includes a bracket 8, a guide channel 9 is provided in the bracket 8, a cavity 10 sleeved on the guide channel 9 is provided in the bracket 8, a liquid discharge pipe 11 is provided at the upper end of the cavity 10, and a water spray nozzle 12 is connected to the liquid discharge pipe 11, and a liquid inlet pipe 13 is provided on the bracket 8 at the lower end of the cavity 10, and the water spray nozzle 12 is provided at the corresponding entrance of the guide channel 9, and a second infrared sensor 14 is provided at the entrance and exit of the guide channel 9.

[0022] The second valve 6 controls whether the water nozzle 12 discharges water. When the end of the billet enters the coverage of the water cooling guide, the second valve 6 closes the water nozzle 12 to stop spraying water, thereby slowing down the cooling speed of the end of the billet. The first valve 3 and the second valve 6 are both electrically controlled gate valves, which are prior art and will not be described again.

[0023] The specific working process is as follows: the spray water cooling unit uses the first infrared sensor 4 to sense the position of the end of the steel billet. When the end of the steel billet enters the spraying area, the first valve 3 is temporarily closed, and the sprayer 1 temporarily stops spraying water to slow down the cooling rate of the end of the steel billet. Before the steel billet enters the guide channel, the second infrared sensor 14 senses the steel billet, temporarily closes the second valve 6, and temporarily stops the water nozzle 12 from spraying water to slow down the cooling rate of the end of the steel billet, thereby avoiding the occurrence of elbows or stratification cracking due to rapid cooling.

[0024] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A cooling water control device for reducing the cooling speed of the head temperature of a rolled piece, characterized in that: It includes a spray water cooling unit and a cooling water tank unit. There are multiple spray water cooling units which are respectively arranged in the roughing mill, the intermediate rolling mill and the pre-finishing mill. The spray water cooling units each include a sprayer and a water inlet pipe. The water inlet pipe is provided with a first valve. The cooling water tank unit includes a water inlet main pipe and multiple water cooling guides. The water cooling guides are each provided with a water inlet branch pipe. The water inlet branch pipes are each provided with a second valve. The water inlet branch pipes are each connected to the water inlet main pipe.

2. A cooling water control device for reducing the cooling speed of the head temperature of a rolled piece as claimed in claim 1, characterized in that: The entrances and exits of the roughing mill group, the intermediate rolling mill group and the pre-finishing rolling mill group are all provided with first infrared sensors.

3. A cooling water control device for reducing the cooling speed of the head temperature of a rolled piece as claimed in claim 1, characterized in that: The water-cooled guide comprises a bracket, a guide channel is arranged in the bracket, a cavity is arranged in the bracket and is sleeved on the guide channel, a drainage pipe is arranged at the upper end of the cavity, the drainage pipe is connected to a water nozzle, and a liquid inlet pipe is arranged on the bracket at the lower end of the cavity.

4. A cooling water control device for reducing the cooling speed of the head temperature of a rolled piece as claimed in claim 3, characterized in that: The water spray nozzle is arranged at the corresponding entrance of the guide channel.

5. A cooling water control device for reducing the cooling speed of the head temperature of a rolled piece as claimed in claim 3, characterized in that: Second infrared sensors are arranged at the entrance and exit of the guide channel.

6. A cooling water control device for reducing the cooling speed of the head temperature of a rolled piece as claimed in claim 1, characterized in that: The first valve and the second valve are both electrically controlled gate valves.

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