Heat Treatment Furnace Door Structure with Sheet Shutter
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Solution Overview
Problem
Conventional door structures for heat treatment furnaces either have high costs and complexity due to the use of cylinders or clamping mechanisms, or they lack sufficient heat-insulating properties when using sheet materials, resulting in inefficient heat energy management.
Innovation Solution
A door structure featuring a sheet shutter with a winding portion and a shutter portion that covers workpiece passing ports, utilizing a gas storage portion between opening members to maintain airtightness and heat insulation, with a simple and lightweight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a door structure uses a cylinder or clamping mechanism to raise and lower the door, then the airtightness and heat-insulating property are improved, but the device complexity and cost increase
Solution Approach 1:
The patent removes the complex cylinder and clamping mechanism from the door structure, extracting only the essential function of opening and closing. The door is simply hung on hinges, eliminating unnecessary mechanical components while maintaining airtightness through the sheet material's inherent properties and the gas storage chamber design.
Solution Approach 2:
The door is divided into multiple functional layers: a sheet material for basic closure, a gas storage chamber for airtightness, and heat insulating material for thermal insulation. This segmentation allows each layer to perform its specific function independently, achieving high reliability without complex integrated mechanisms.
2Reliability
If a door structure uses a cylinder or clamping mechanism, then the airtightness is improved, but the weight and occupied space increase
Solution Approach 1:
The heavy cylinder and clamping mechanism are completely removed from the door structure. The door relies on its inherent weight and the gas storage chamber pressure to maintain airtightness, significantly reducing the overall weight while achieving the same sealing effect.
Solution Approach 2:
The patent changes the approach to achieving airtightness from mechanical force (cylinder pressure) to pressure differential (gas storage chamber). This parameter change allows the door to maintain sealing without the weight of heavy mechanical actuators.
3Weight of moving object
If a door is made of sheet material without additional insulation, then the weight and cost are reduced, but the heat-insulating property becomes insufficient
Solution Approach 1:
The heat insulating material is nested within the door structure, placed between the sheet material and the gas storage chamber. This nested arrangement provides effective thermal insulation without adding significant external weight or volume, as the insulation is integrated into the existing door layers.
Solution Approach 2:
The door employs a composite structure combining sheet material, gas storage chamber, and heat insulating material. This composite design achieves superior heat-insulating properties by combining materials with complementary characteristics, reducing heat energy loss without proportionally increasing weight.
4Reliability
If a door structure adds heat insulator and complex mechanisms, then the heat-insulating property and airtightness are improved, but the structure becomes complicated and extensive
Solution Approach 1:
The door is segmented into distinct functional layers (sheet material, gas storage chamber, heat insulating material), where each segment performs a specific function. This modular segmentation simplifies the overall structure by assigning dedicated roles to each component, avoiding the need for complex integrated mechanisms.
Solution Approach 2:
The heat insulating material and gas storage chamber are nested within the door structure in a compact arrangement. This nested configuration achieves effective heat insulation and airtightness without making the structure extensive or complicated, as components are efficiently packed within the door's volume.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves a lightweight, simple, and cost-effective door structure with sufficient airtightness and heat-insulating properties, maintaining efficient heat energy management and temperature control within the furnace.
Implementation Method 1
it is configured that a gas storage portion in which gas flowing from a furnace interior is stored is formed between the first opening member and the second opening member at the time that the shutter portion is closed
Implementation Method 2
a structure of a door is required to have excellent airtightness and heat-insulating property in view of heat energy efficiency
Data Source
AI summary
In a door structure of a heat treatment furnace performing a heat treatment of a workpiece, there are provided: a first opening member and a second opening member in which workpiece passing ports where the transferred workpiece passes are formed; and a sheet shutter, the sheet shutter is provided with a winding portion and a shutter portion, the shutter portion is disposed between the first opening member and the second opening member, the shutter portion is provided with a first sheet portion which covers the workpiece passing port of the first opening member and a second sheet portion which covers the workpiece passing port of the second opening member at a time that the shutter portion is closed, and it is configured that a gas storage portion is formed between the first opening member and the second opening member at the time that the shutter portion is closed.