A trolley type heating furnace with a pressurized air cavity for reinforcing heat insulation

Abstract

The utility model provides a trolley type heating furnace of heat -proof is strengthened with pressure gas cavity, sets up pressure gas cavity below the heating cavity of trolley type heating furnace, sets up the working pressure in pressure gas cavity slightly greater than the pressure in heating cavity, and intelligent control pressure in pressure gas cavity and heating cavity, adjusts the pressure in heating cavity and pressure gas cavity through PLC real -time, controls the amount of hot gas overflow in heating cavity and the amount of cold gas in pressure gas cavity into heating cavity, makes gas in heating cavity and pressure gas cavity keep dynamic balance, adds and sets up pressure normal temperature gas heat -proof for traditional heat -proof device, thereby further avoids energy waste and equipment damage, improves the thermal efficiency of heating furnace. The utility model has the advantages of reasonable in design, simple structure, good heat preservation effect and energy saving and consumption reduction.

Description

Technical Field

[0001] This utility model relates to a heat insulation and sealing structure for a bogie furnace, specifically a gas-insulated bogie furnace with a certain pressure, belonging to the field of mechanical design and manufacturing technology. Background Technology

[0002] In a bogie hearth furnace, the bogie is loaded outside the furnace, heated inside, and then unloaded outside. This type of furnace has fixed walls and a movable bogie forming the furnace bottom. A gap exists between the bogie's side and the furnace wall, allowing it to move and communicate with the outside. To prevent heat loss inside the furnace and between the bogie and the furnace wall, sand-sealing grooves or heat-resistant fiber grooves are installed at the gap. These grooves are filled with insulating sand or a certain amount of heat-resistant fiber. Insulating plates are then installed on the bogie, forming a sand-sealing or heat-resistant fiber insulation device between the bogie and the furnace wall. However, this insulation device is ineffective. Because the gas pressure inside the furnace is higher than outside, and because sand particles are scraped off or heat-resistant fibers are damaged by the insulating plates, high-temperature gas escapes through the gap, significantly reducing the furnace's insulation performance. This not only causes energy loss but also damages the billet equipment. Therefore, technical improvements to the existing insulation device are necessary. Summary of the Invention

[0003] This utility model provides a trolley-type heating furnace that utilizes a pressurized gas chamber to enhance heat insulation. A pressurized gas chamber is set below the heating furnace cavity, and the pressure of the pressurized gas chamber is intelligently controlled to adjust the amount of hot gas overflowing from the furnace cavity and the amount of cold gas entering the furnace in real time, thereby achieving dynamic gas balance and heat insulation between the inside and outside of the furnace.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a trolley-type heating furnace with enhanced heat insulation using a pressurized air chamber, comprising: a furnace body and a trolley, wherein the furnace body includes a furnace wall and a furnace cavity, the trolley divides the furnace cavity into an upper cavity and a lower cavity, the upper cavity being a heating cavity, and the lower cavity being the space enclosed by the lower bottom surface of the trolley, the lower part of the furnace wall, and the furnace base surface, wherein a heat insulation device is provided at the movable connection between the side wall of the furnace cavity and the trolley, characterized in that:

[0005] The lower chamber is configured as a pressurized gas chamber, and the pressurized gas chamber and the heating chamber are respectively set with working pressure, and the gas pressure in the pressurized gas chamber is higher than the pressure of the high-temperature gas in the heating chamber.

[0006] The pressurized air chamber is equipped with a fan for pressurization, and the fan adjusts the pressure inside the pressurized air chamber in real time.

[0007] The pressurized gas chamber is a closed chamber during the heating process in the furnace and an open chamber during the process of the trolley entering and exiting the furnace chamber.

[0008] The pressurized air chamber and the heating chamber are respectively equipped with pressure transmitters, which are electrically connected to the PLC.

[0009] The PLC is electrically connected to the fan and adjusts the fan speed in real time according to the pressure value measured by the pressure transmitter.

[0010] Preferably, the working pressure inside the heating chamber is set to 5-8 Pa.

[0011] Preferably, when the pressurized air chamber is closed, its internal working pressure is set to 8-12 Pa.

[0012] This invention features a pressurized gas chamber located below the heating chamber of a bogie-type heating furnace. The working pressure within the pressurized gas chamber is slightly higher than that within the heating chamber. The pressures in both chambers are intelligently controlled by a PLC, which adjusts them in real-time to regulate the amount of hot gas overflowing from the heating chamber and the amount of cold gas entering from the pressurized gas chamber. This maintains a dynamic balance between the gases in the heating and pressurized gas chambers. This design adds pressurized, ambient-temperature gas to the traditional insulation device, further preventing energy waste and equipment damage, and improving the furnace's thermal efficiency.

[0013] This utility model has the advantages of reasonable design, simple structure, good heat preservation effect and energy saving. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the main sectional structure of this utility model;

[0015] Appendix Figure 2 For the appendix Figure 1 Schematic diagram of the cross-sectional structure at section AA.

[0016] In the attached diagram, 1 is the heating chamber, 2 is the trolley, 3 is the steel billet, 4 is the furnace door, 5 is the guide rail, 6 is the trolley wheel, 7 is the pressurized air chamber, 8 is the blower, 801 is the blower outlet, and 9 is the heat insulation device. Detailed Implementation

[0017] The present invention will be further explained below with reference to the accompanying drawings:

[0018] As attached Figure 1 and 2As shown, the trolley 2 divides the furnace chamber into an upper heating chamber 1 and a lower pressurized gas chamber 7. The steel billet 3 is heated in the heating chamber 1, and the heat insulation device 9 separates the heating chamber 1 and the pressurized gas chamber 7. The pressurized gas chamber 7 is the space enclosed by the bottom surface of the trolley 2, the lower part of the furnace wall, and the furnace foundation. The furnace door 4 is fixedly connected to one end of the trolley 2, and the trolley wheels 6 of the trolley 2 can slide in and out of the furnace chamber on the guide rail 5. When exiting the furnace, the trolley wheels 6 slide out of the furnace on the guide rail 5, and the furnace door 4 leaves the furnace body. At this time, the heating chamber 1 stops heating the steel billet 3, and the pressurized gas chamber 7 is open and connected to the atmosphere. When entering the furnace, the trolley wheels 6 slide into the furnace on the guide rail 5 until the furnace door 4 is close to the furnace body. At this time, the heating chamber 1 begins to heat the steel billet 3, and the pressurized gas chamber 7 is closed. The blower outlet 801 on the blower 8 blows external gas into the pressurized gas chamber 7, so that the pressurized gas chamber 7 has a certain pressure.

[0019] Pressure transmitters (not shown in the figure) are installed in both the pressurized air chamber 7 and the heating chamber 1, and a PLC (not shown in the figure) is also installed. The pressure transmitters and the PLC are electrically connected, and the fan 8 is electrically connected to the PLC. The heating chamber 1 and the pressurized air chamber 7 are set with a certain working pressure. The PLC, based on the real-time pressure values ​​in the heating chamber 1 and the pressurized air chamber 7 measured by the pressure transmitters and the set working pressure values, instructs the fan 8 to change its speed, thereby adjusting the pressure in the pressurized air chamber 7 in real time. This controls the amount of hot gas overflowing from the heating chamber 1 and the amount of cold gas entering the heating chamber 1 from the pressurized air chamber 7, achieving dynamic gas balance insulation at the insulation device 9.

Claims

1. A bogie-type heating furnace with enhanced insulation using a pressurized air chamber, comprising: The furnace body includes a furnace wall and a furnace cavity. The platform of the trolley divides the furnace cavity into an upper cavity and a lower cavity. The upper cavity is a heating cavity, and the lower cavity is the space enclosed by the lower bottom surface of the trolley, the lower part of the furnace wall, and the furnace base. A heat insulation device is provided at the movable connection between the side wall of the furnace cavity and the trolley. The furnace cavity is characterized by the following features: The lower chamber is configured as a pressurized gas chamber, and the pressurized gas chamber and the heating chamber are respectively set with working pressure, and the gas pressure in the pressurized gas chamber is higher than the pressure of the high-temperature gas in the heating chamber. The pressurized air chamber is equipped with a fan for pressurization, and the fan adjusts the pressure inside the pressurized air chamber in real time. The pressurized gas chamber is a closed chamber during the heating process in the heating furnace, and an open chamber during the process of the trolley entering and exiting the furnace chamber; The pressurized air chamber and the heating chamber are respectively equipped with pressure transmitters, which are electrically connected to the PLC. The PLC is electrically connected to the fan and adjusts the fan speed in real time according to the pressure value measured by the pressure transmitter.

2. A bogie-type heating furnace with enhanced insulation using a pressurized air chamber according to claim 1, characterized in that: The working pressure inside the heating chamber is set to 5-8 Pa.

3. A bogie-type heating furnace with enhanced insulation using a pressurized air chamber according to claim 1, characterized in that: When the pressurized air chamber is closed, its internal working pressure is set to 8-12 Pa.

Images