Anchor bolts are indispensable fasteners in industrial and construction fields, primarily used to fix machinery, steel structures, etc., to the foundation or concrete base, ensuring the stability and safety of the structure. They come in various types, which can be further subdivided according to different structural forms, application scenarios, and functional requirements.
1. Fixed Anchor Bolts Fixed anchor bolts are the most basic type, typically fixed directly to the concrete foundation by welding or pre-embedding. These bolts have a simple structure and their position remains fixed after installation, making them suitable for situations where the accuracy of equipment positioning is not high, or where the equipment does not generate severe vibration during operation. Fixed anchor bolts can be further divided into short anchor bolts and long anchor bolts; the former is suitable for light equipment, while the latter is mostly used for heavy equipment or structures that need to withstand large horizontal forces.
2. Adjustable Anchor Bolts Adjustable anchor bolts, as the name suggests, allow for fine-tuning of their position after installation. These bolts typically include a nut and a movable bolt body, allowing for fine-tuning of the equipment height by adjusting the position of the nut. Adjustable anchor bolts are particularly suitable for applications requiring precise adjustment of equipment level or height, such as the installation of precision machine tools and vibrating screens.
3. Expansion Anchor Bolts Expansion anchor bolts utilize the friction or mechanical interlocking between the bolt and concrete to secure equipment. Installation does not require pre-drilling; instead, the bolt's expansion creates anchoring force within the concrete. These bolts are easy to install, suitable for hardened concrete foundations, and cause minimal damage to the foundation. Expansion anchor bolts are widely used for various temporary or permanent equipment fixing applications.
4. Adhesive Anchor Bolts Adhesive anchor bolts use chemical adhesives to firmly bond the bolt to the concrete foundation. These bolts offer excellent vibration resistance and durability, making them particularly suitable for applications with high vibration, high loads, or high corrosion resistance requirements. The installation of adhesive anchor bolts requires strict control of the adhesive ratio and construction environment to ensure bonding quality.
5. Pre-embedded Anchor Bolts Pre-embedded anchor bolts are bolts that are pre-installed in the foundation before concrete pouring. These bolts form an integral part with the foundation, exhibiting extremely high stability and load-bearing capacity. Pre-embedded anchor bolts are suitable for the installation of large, heavy equipment, such as wind turbine generators and large presses. Their installation requires high precision, necessitating accurate positioning and fixing before concrete pouring.
