Tunnel type plate strip heating protection device

Abstract

The utility model discloses a tunnel type plate strip heating protection device which comprises a tunnel and a controller, the front end face and the rear end face of the tunnel are closed, the front end face and the rear end face of the tunnel are provided with a feeding port and a discharging port which are used for plate strips to enter and exit respectively, a flame projector for sealing the feeding port and the discharging port is arranged in the tunnel, and the flame projector is communicated with a fuel gas source. A gas inlet pipe I with a control valve I and a gas inlet pipe II with a control valve II are arranged in the tunnel, the gas inlet pipe I and the gas inlet pipe II are respectively communicated with an inert gas source and a hydrogen source, the controller is connected with the flame projector, the control valve I and the control valve II, the controller controls the flame projector to start and stop, and the controller controls the control valve I and the control valve II to open and close. Compared with the prior art, the device can reduce generation of oxide on the surface of the plate in the heating process, and is suitable for continuous hot rolling compounding of the metal composite plate strip.

Description

Technical Field

[0001] This utility model belongs to the field of metal processing, and specifically relates to a tunnel-type strip heating protection device applied to hot-rolled metal composite plates. Background Technology

[0002] Metal composite sheets are multi-layered materials made by bonding two or more different metals at the interface through special processes (such as explosive bonding, rolling bonding, etc.). Their core characteristic is that while retaining the advantages of a single metal, they compensate for its performance shortcomings. For example, the base metal provides mechanical strength, while the cladding metal enhances corrosion resistance, thereby reducing the cost of using precious metals.

[0003] In the hot-rolling process of metal composite sheets, heating can cause interfacial oxidation, forming a brittle and hard structure that affects the bonding strength. Simultaneously, the presence of the oxide layer hinders atomic diffusion, leading to suboptimal composite results. Current methods to reduce surface oxidation include: lowering the heating temperature to reduce the oxidation rate, but this results in lower heating efficiency; pre-drilling and sealing vent holes at the composite sheet interface to prevent internal gas expansion and oxidation during heating, but this process is complex; and rolling in a vacuum environment to eliminate the oxidizing atmosphere and maintain the activity of the newly formed metal surface, but this requires addressing the challenges of vacuum equipment costs and continuous production. Utility Model Content

[0004] The purpose of this invention is to overcome the problem of oxide generation during the hot rolling composite process of existing metal composite plates, and to provide a tunnel-type plate and strip heating protection device that can reduce the generation of oxides on the plate surface during the heating process and is suitable for continuous hot rolling composite.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a tunnel-type strip heating protection device, including a front and rear sealed tunnel and a controller. The front and rear ends of the tunnel are respectively provided with an inlet and an outlet for the strip to enter and exit. The tunnel is equipped with a flame seal inlet and outlet flame injector, which is connected to a gas source. The tunnel is equipped with an air inlet pipe I with control valve I and an air inlet pipe II with control valve II. The air inlet pipe I and the air inlet pipe II are respectively connected to an inert gas source and a hydrogen source. The controller is connected to the flame injector, control valve I and control valve II. The controller controls the start and stop of the flame injector and controls the opening and closing of control valve I and control valve II.

[0006] Optionally, the air intake pipe I and air intake pipe II are located at the top or bottom of the tunnel inner wall.

[0007] Optionally, the tunnel is a cuboid.

[0008] The method of use of this utility model is as follows: A heater is set up in the tunnel, and two or more types of plates are pulled into the tunnel from the feed port for correction and stacking, and then come out from the discharge port. The controller opens the air inlet pipe I and air inlet pipe II, and inert gas and hydrogen are continuously injected into the tunnel through the air inlet pipe I and air inlet pipe II. After a period of time, the controller starts the flame burner, and then starts the heater to continuously heat the plates that are being pulled forward. After the heated plates come out from the discharge port, they are immediately rolled and laminated by the rolling mill.

[0009] The principle of this invention is as follows: The strip to be heated is placed in a relatively sealed tunnel. Inert gas and hydrogen are continuously injected into the tunnel, causing the tunnel to be filled with inert gas and hydrogen. The inert gas and hydrogen then escape through the gaps in the tunnel, forming a positive pressure barrier to prevent oxygen-containing air from entering the tunnel. At the same time, the inlet and outlet of the tunnel are sealed with a continuous flame from a blower, burning oxygen to further prevent oxygen-containing air from entering the tunnel. In addition, the hydrogen filling the tunnel can reduce the oxides on the surface of the strip. In a high-temperature environment, this reduction is accelerated. Using this method, the generation of oxides can be reduced at each stage. Furthermore, by traction of the strip at the inlet and outlet, the heated strip can be continuously drawn into the rolling mill for composite processing, which can be applied to the continuous production process of metal composite strips.

[0010] Compared with the prior art, the present invention has at least the following beneficial effects: the present invention can reduce the generation of oxides on the surface of the plate during the heating process, and is suitable for continuous hot rolling composite of metal composite plates and strips. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] The following are the sub-labels in the attached drawings: tunnel 1, feed inlet 2, discharge outlet 3, flamethrower 4, air inlet pipe I 5, air inlet pipe II 6. Detailed Implementation

[0013] Example 1, in conjunction with the following Figure 1 To further illustrate this utility model, the tunnel-type strip heating protection device includes a front and rear sealed tunnel 1 and a controller. The tunnel is a cuboid, with an inlet 2 and an outlet 3 for the strip to enter and exit at the front and rear ends, respectively. Inside the tunnel, there is a flame sealer 4 for the inlet and outlet, which is connected to a gas source. Inside the tunnel, there is an air inlet pipe 1 5 with a control valve 1 and an air inlet pipe 6 with a control valve 2. The air inlet pipe 1 and the air inlet pipe 2 are located at the top or bottom of the tunnel wall. The air inlet pipe 1 and the air inlet pipe 2 are connected to an inert gas source and a hydrogen source, respectively. The controller is connected to the flame sealer, control valve 1 and control valve 2. The controller controls the start and stop of the flame sealer and controls the opening and closing of control valve 1 and control valve 2.

[0014] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tunnel-type plate and strip heating protection device, comprising a front and rear sealed tunnel (1) and a controller, characterized in that: The front and rear ends of the tunnel are respectively provided with a feed inlet (2) and a discharge outlet (3) for the plate and strip to enter and exit. Inside the tunnel, there is a flame seal feed inlet and a discharge outlet flamer (4). The flamer is connected to the gas source. Inside the tunnel, there is an air inlet pipe I (5) with control valve I and an air inlet pipe II (6) with control valve II. The air inlet pipe I and the air inlet pipe II are respectively connected to an inert gas source and a hydrogen source. The controller is connected to the flamer, control valve I and control valve II. The controller controls the start and stop of the flamer and controls the opening and closing of control valve I and control valve II.

2. The tunnel-type strip heating protection device according to claim 1, characterized in that: Air intake pipe I and air intake pipe II are located at the top or bottom of the tunnel wall.

3. The tunnel-type strip heating protection device according to claim 1, characterized in that: The tunnel is a cuboid.

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