Steel rolling heating furnace

Abstract

The invention discloses a steel rolling heating furnace. Comprising a furnace body, more than one tapping machine is arranged on one side of the furnace body side by side, and tapping arm inlets and outlets corresponding to tapping arms of the tapping machines are formed in the furnace body; a steel tapping arm door is arranged corresponding to the steel tapping arm inlet and outlet; according to the tapping arm door, a cooling frame is arranged on the portion, at the tapping arm inlet and outlet, of the furnace body; a flame blocking door is arranged corresponding to the cooling frame; a lifting mechanism used for driving the flame blocking door to ascend and descend is arranged on the outer side of the furnace body and corresponds to the flame blocking door. The sealing system is arranged at the inlet and outlet of the tapping arm of the tapping machine of the heating furnace, so that the problem of fire at the inlet and outlet of the tapping arm of the tapping machine is solved. The working environment is improved, and the problems that nearby equipment is damaged by high temperature, the service life is shortened and the failure rate is high are solved; and the loss of fuel is reduced, and the utilization efficiency of energy is improved. Therefore, the maintenance cost and the operation cost of an enterprise are further reduced.

Description

Technical Field

[0001] The invention provides a steel rolling heating furnace. Background Art

[0002] The steel tapping machine is located in front of the discharge side of the heating furnace. When the billet heated in the heating furnace is sent to the cantilever roller, the steel tapping machine receives the steel tapping signal and extends the steel tapping arm. The steel tapping arm enters the furnace from outside the furnace through the steel tapping arm inlet and outlet, lifts the billet and puts it on the cantilever roller. The steel tapping arm that completes the lifting task returns to the outside of the furnace and waits for the next steel tapping cycle. The billet is sent to the rolling mill outside the furnace through the cantilever roller for rolling. Since the steel tapping side in the furnace is in a positive pressure state (process requirements), the steel tapping arm inlet and outlet will emit fire during the steel waiting process. The following problems are often accompanied in the production process: 1) Increased heat loss: Fire means unnecessary loss of heat from the heating furnace, which not only reduces energy utilization efficiency, but also increases operating costs. 2) Pollution of the working environment: Fire will cause harmful gases such as SO2 to enter the workshop, pollute the working environment, and pose a threat to the health of workers. 3) The end steel structure is deformed by heat. 4) Equipment damage or increased failure rate, which not only affects the life of the equipment, but also may affect the continuity and safety of production.

[0003] In actual production, the inlet and outlet of the steel tapping machine arm are generally open without sealing or simply treated with fire baffles; this method has the following disadvantages:

[0004] 1. The open type is adopted, and the flame emerges from the inlet and outlet of the steel-outlet arm. The ambient temperature is high, the working environment is harsh, the steel structure at the end of the steel-outlet side is deformed by heat, the accident rate of the end equipment is increased, and the service life is shortened.

[0005] 2. A simple sealing device is often used, but its service life is very short. After the sealing device is damaged, the above problems will occur again. Moreover, due to the fire here, the furnace needs to be shut down to deal with it, affecting production. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a steel rolling heating furnace.

[0007] To achieve the above object, the steel rolling heating furnace of the present invention comprises a furnace body, one or more steel tapping machines are arranged side by side on one side of the furnace body, steel tapping arm inlets and outlets are arranged on the furnace body corresponding to the steel tapping arms of the steel tapping machines; steel tapping arm doors are arranged corresponding to the steel tapping arm inlets and outlets; wherein,

[0008] The steel-discharging arm door comprises: a cooling frame is arranged on the furnace body at the inlet and outlet of the steel-discharging arm; a flame-blocking door is arranged corresponding to the cooling frame; and a lifting mechanism for driving the flame-blocking door to be lifted and lowered is arranged on the outer side of the furnace body corresponding to the flame-blocking door.

[0009] Furthermore, the cooling frame comprises a hollow frame body, and the hollow frame body is provided with a water inlet and a water outlet which are connected with the hollow part of the frame body.

[0010] Furthermore, an inner lining is provided on the inner side of the flame baffle, and the inner lining is composed of a high-temperature fiber blanket layer located on the outer side and a heavy casting material layer located on the inner side of the high-temperature fiber blanket layer.

[0011] Furthermore, an inner lining is provided on the inner side of the flame baffle, and the inner lining is composed of a high-temperature fiber blanket layer located on the outer side and a heavy casting material layer located on the inner side of the high-temperature fiber blanket layer.

[0012] Furthermore, a counterweight system is provided on the furnace body corresponding to the steel tapping arm door.

[0013] Furthermore, the counterweight system includes: a sprocket is arranged on the furnace body corresponding to the steel-discharging arm door; a chain is arranged on the sprocket, one end of the chain is connected to the flame-blocking door; and the other end of the chain is connected to a counterweight.

[0014] Furthermore, slide grooves are arranged on both sides of the cooling frame corresponding to the flame baffle door, and the flame baffle door is arranged in the slide grooves.

[0015] Furthermore, an entry and exit window is provided on the steel-outlet arm door corresponding to the steel-outlet arm.

[0016] Furthermore, a roller is provided on the steel-discharging arm door corresponding to the inlet and outlet window, and the lower edge of the roller is lower than the upper edge of the inlet and outlet window.

[0017] The present invention has the following advantages:

[0018] 1) Add cooling water pipelines as the cold source of the water-cooled frame. A temperature detector is installed on the return water pipeline. During normal production, the temperature at the inlet and outlet of the steel-discharging arm is high and the working environment is harsh. A water-cooled frame is installed and cooling water is introduced to cool and protect the water-cooled frame. The value detected by the temperature detector on the return water pipeline (the return water temperature does not exceed 50°C) is used to adjust the valve on the water inlet pipeline to achieve the purpose of cooling and protecting the water-cooled frame and saving water.

[0019] 2) The steel-discharging arm door of the steel-discharging machine includes a lifting mechanism, a flame-blocking door and a water-cooling frame. When the steel-discharging machine receives the steel-discharging signal, the action of the steel-discharging arm is interlocked with the lifting of the furnace door. When the steel-discharging arm receives the steel-discharging signal, the lifting device of the furnace door starts to move upward to pull up the flame-blocking door. The lifting is completed before the steel-discharging arm runs to the entrance of the steel-discharging arm. The steel-discharging arm enters the furnace to lift the billet and place it on the cantilever roller. After completing the lifting task, the steel-discharging arm returns to the outside of the furnace, and the flame-blocking door drops to its original position to prevent flames from emitting. The lifting height of the flame-blocking door is controlled by a proximity switch.

[0020] 3) This system is designed based on a steel-discharging machine with four steel-discharging arms, but it is not only applicable to four steel-discharging arms, but also to more than four or less than four steel-discharging arms.

[0021] The sealing system is set at the inlet and outlet of the tapping arm of the heating furnace to solve the problem of fire at the inlet and outlet of the tapping arm. It not only improves the working environment, avoids the damage of nearby equipment by high temperature, shortens the service life and has a high failure rate, but also reduces the loss of fuel and improves the efficiency of energy utilization. Thus, it further reduces the maintenance cost and operation cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the heating furnace and the steel tapping machine in the present invention.

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the inlet and outlet of the middle steel-discharging arm.

[0024] Figure 3 for Figure 2 Side view of.

[0025] Figure 4 This is a schematic diagram of the structure of the flame baffle.

[0026] Figure 5 for Figure 4 Side view of.

[0027] Figure 6 This is a schematic diagram of the structure of the flame baffle.

[0028] Figure 7 This is a schematic diagram of the structure when the steel-discharging arm enters the inlet and outlet window. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 As shown, the present invention comprises a furnace body 1, on one side of the furnace body are arranged a cantilever roller 2 and a plurality of steel tapping machines 3, a steel tapping arm inlet and outlet 5 is arranged on the furnace body 1 corresponding to the steel tapping arm 4 of the steel tapping machine 3; a steel tapping arm door 6 is arranged corresponding to the steel tapping arm inlet and outlet; wherein,

[0034] The steel tapping arm door comprises: a cooling frame 61 is arranged on the furnace body at the inlet and outlet of the steel tapping arm; the cooling frame comprises a hollow frame, and a water inlet 611 and a water outlet 612 connected to the hollow part of the frame are arranged on the hollow frame. The water inlet and outlet can be adjusted according to the temperature detected by the temperature detection device on the water outlet pipeline.

[0035] A flame baffle door 62 is provided corresponding to the cooling frame; an inner lining is provided on the inner side of the flame baffle door, and the inner lining is composed of a high-temperature fiber blanket layer 621 located on the outer side and a heavy casting material layer 622 located on the inner side of the high-temperature fiber blanket layer.

[0036] A lifting mechanism and a counterweight system for driving the flame baffle door to be lifted and lowered are provided on the outer side of the furnace body corresponding to the flame baffle door. The counterweight system comprises: a sprocket 71 is provided on the furnace body corresponding to the steel tapping arm door; a chain 72 is provided on the sprocket, one end of the chain is connected to the flame baffle door; and a counterweight 73 is connected to the other end of the chain. The lifting mechanism can be a traction device controlled by a PLC to pull the counterweight end to realize the lifting and lowering of the flame baffle door, or the lifting and lowering can be realized by driving the forward and reverse wheels of the sprocket by a motor.

[0037] The steel tapping machine receives the steel tapping signal. Since the steel tapping arm movement is linked to the furnace door lifting, the furnace door lifting device starts to move upward to pull up the flame barrier door at the same time as the steel tapping arm receives the steel tapping signal. The lifting is completed before the steel tapping arm runs to the steel tapping arm entrance. The steel tapping arm enters the furnace to lift the billet and place it on the cantilever roller. After completing the lifting task, the steel tapping arm returns to the outside of the furnace, and the flame barrier door drops to its original position to prevent flames from emitting. The lifting height of the flame barrier door is controlled by a proximity switch.

[0038] As a further improvement of the present invention, an inlet and outlet window 624 matching with the steel tapping arm can be provided on the flame baffle, so that the steel tapping arm can enter the furnace body through the inlet and outlet window 624. A roller 623 is provided on the flame baffle above the inlet and outlet window, and the lower edge of the roller 623 is lower than the upper edge of the inlet and outlet window; the height between the lower edge of the inlet and outlet window and the lower edge of the roller 623 is slightly greater than the height of the steel tapping arm, so that the flame baffle is always pressed on the upper surface of the steel tapping arm under the action of its own weight, thereby ensuring that the position of the inlet and outlet window relative to the steel tapping arm remains unchanged.

[0039] The present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. Many other changes and modifications that do not depart from the concept and scope of the present invention should be regarded as the protection scope of the present invention.

[0040] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0041] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A steel rolling heating furnace, characterized in that: It comprises a furnace body, one side of which is provided with one or more steel tapping machines, and a steel tapping arm inlet and outlet are provided on the furnace body corresponding to the steel tapping arms of the steel tapping machines; a steel tapping arm door is provided corresponding to the steel tapping arm inlet and outlet; wherein, The steel-discharging arm door comprises: a cooling frame is arranged on the furnace body at the inlet and outlet of the steel-discharging arm; a flame-blocking door is arranged corresponding to the cooling frame; and a lifting mechanism for driving the flame-blocking door to be lifted and lowered is arranged on the outer side of the furnace body corresponding to the flame-blocking door.

2. The steel rolling heating furnace according to claim 1, characterized in that: The cooling frame comprises a hollow frame body, on which a water inlet and a water outlet communicating with the hollow part of the frame body are arranged.

3. The steel rolling heating furnace according to claim 1, characterized in that: The inner side of the flame baffle is provided with an inner lining, and the inner lining is composed of a high-temperature fiber blanket layer located on the outer side and a heavy casting material layer located on the inner side of the high-temperature fiber blanket layer.

4. The steel rolling heating furnace according to claim 1, characterized in that: The inner side of the flame baffle is provided with an inner lining, and the inner lining is composed of a high-temperature fiber blanket layer located on the outer side and a heavy casting material layer located on the inner side of the high-temperature fiber blanket layer.

5. The steel rolling heating furnace according to claim 1, characterized in that: A counterweight system is arranged on the furnace body corresponding to the steel tapping arm door.

6. The steel rolling heating furnace according to claim 5, characterized in that: The counterweight system comprises: a sprocket is arranged on the furnace body corresponding to the steel-discharging arm door; a chain is arranged on the sprocket, one end of the chain is connected to the flame-blocking door; and the other end of the chain is connected to a counterweight.

7. The steel rolling heating furnace according to claim 1, characterized in that: Slide grooves are arranged on the cooling frame at both sides corresponding to the flame-blocking door, and the flame-blocking door is arranged in the slide grooves.

8. The steel rolling heating furnace according to claim 1, characterized in that: An inlet and outlet window is arranged on the steel-discharging arm door corresponding to the steel-discharging arm.

9. The steel rolling heating furnace according to claim 1, characterized in that: A roller is arranged on the steel-discharging arm door corresponding to the inlet and outlet window, and the lower edge of the roller is lower than the upper edge of the inlet and outlet window.

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