Process characteristics and usage of spring skeleton
Aug 12,2025
As the core supporting component of dust removal bags, the spring skeleton plays an important role in industrial dust removal systems due to its unique elastic structure and adaptability. The process design directly affects the installation efficiency and service life of the bag, and a reasonable usage method is the key to ensuring the stable operation of the dust removal system, especially suitable for diverse working conditions in foreign trade scenarios.
1、 Craft features: perfect combination of elasticity and durability
1. Material selection: the basis for adapting to multiple working conditions
The material of the spring frame needs to be accurately selected according to the working conditions such as flue gas temperature and corrosiveness:
Low carbon steel (Q235): After cold drawing and forming, the surface is galvanized with a zinc layer thickness of ≥ 60 μ m. The salt spray test lasts for 48 hours and is suitable for normal temperature (≤ 120 ℃) and non corrosive working conditions, such as grain processing and wood processing. It has high cost-effectiveness and is the mainstream choice in markets such as Southeast Asia and South America.
Stainless steel (304/316L): 304 stainless steel can withstand medium temperatures of 150-200 ℃ and resist mild corrosion; 316L stainless steel has a temperature resistance of up to 250 ℃ and can resist acid and alkali fumes. It is suitable for chemical and waste incineration scenarios and meets the EU REACH restrictions on heavy metals.
2. Winding process: precise control of elasticity guarantee
Using a CNC spring machine for winding, the pitch error is ≤± 0.5mm, ensuring uniform spacing between each turn. During the winding process, the steel wire undergoes permanent elastic deformation through tension control. The finished product can be compressed to one-third of its original length in a free state, and can be restored to its original state after stretching, making it easy to quickly install the bag - a single person can complete the bagging operation, saving 50% of installation time compared to traditional rigid skeletons.
The diameter of the steel wire is designed according to the diameter of the skeleton, usually 3-5mm, to ensure support strength while avoiding damage to the cloth bag caused by excessive hardness. Resistance welding is used for the welding points, which are smooth and free of burrs. After polishing with 800 grit sandpaper, the roughness Ra is ≤ 1.6 μ m, reducing friction and wear on the cloth bag.
3. Surface treatment: the key to extending lifespan
In addition to galvanizing, Dacromet coating can be used for high humidity environments, which increases corrosion resistance by three times; High temperature resistant paint is selected under high temperature conditions, with an adhesion level of 0, and will not peel off after long-term use at 200 ℃. Surface treatment must pass SGS testing and comply with the heavy metal content limits in European and American environmental standards.
2、 Usage scenarios and adaptation points
1. Core applicable areas
Pulse bag dust collector: The elasticity of the spring frame can cooperate with the pulse blowing action to slightly expand and contract, reducing the rigid friction between the bag and the frame. It is especially suitable for large equipment with filter bag length>6 meters, such as long bag low-voltage pulse dust collectors in the power and steel industries.
Small and medium air volume dust removal system: In small dust collectors in industries such as furniture and food, its lightweight characteristics can reduce equipment load and facilitate handling and maintenance.
Alien bag support: can be customized with special specifications such as conical and elliptical shapes, suitable for non-standard bags, and meet the customized needs of niche industries in Europe.
2. Installation and maintenance precautions
Installation specifications: When stretching the skeleton, uniform force should be applied to avoid deformation caused by excessive local stress; When bagging, ensure that the skeleton is fully stretched and adheres to the inner wall of the bag without wrinkles to prevent local dust accumulation.
Regular inspection: Check the elasticity of the skeleton every quarter to see if it has decayed, if the surface is corroded or if the welding points have fallen off. If any problems are found, replace them in a timely manner, especially during the high humidity Southeast Asian rainy season where inspection frequency needs to be increased.
Storage requirements: Unused skeletons should be sealed and stored in a dry environment to avoid contact with acidic and alkaline substances. North American customers should pay attention to complying with UL packaging material environmental standards.
3、 Adaptation advantages of foreign trade market
The elastic design of the spring frame enables it to adapt to the installation process differences in different countries: in the high labor cost European and American markets, it can shorten the installation time; In logistics inconvenient regions of Africa, the compressed packaging volume is reduced by 30%, reducing transportation costs. At the same time, its standardized production can quickly match the bag size standards of the European Union, North America and other regions, reducing cross-border adaptation errors.
The spring frame ensures practicality with craftsmanship details, serving as both the "elastic shield" of the bag and an efficient accessory choice for foreign trade dust removal equipment. Grasping its process characteristics and usage standards can enable the dust removal system to operate continuously and stably in diverse global working conditions, reducing operation and maintenance costs for enterprises while helping to break through technical barriers in the international market.
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