Adjusting Base 22-1A (Die-Forged)
Die-forged tunnel base with multi-hole adjustment face for precise positioning of OCS support components.
Specifications
| Model | 22-1A (die-forged) |
|---|---|
| Drawing No. | 22-1A |
| Standard | TB/T 2075.22-2024 — Part 22: Tunnel support and positioning devices |
| Materials | Die-forged steel, anti-corrosion coated |
| Installation | Mounted on tunnel support structures for component fixing and position adjustment |
The 22-1A adjusting base is a die-forged positioning member of tunnel support and positioning devices. Mounted on the hanging post or the tunnel mounting face, its multi-hole adjustment face carries the supported component — insulator fittings, support members and similar parts — and permits fine position correction so the assembled suspension keeps its designed geometry.
Die forging gives the base a continuous grain flow and dense structure, hence high load capacity in a compact envelope — valuable where tunnel clearances restrict fitting size. Interfaces match the TB/T 2075.22 tunnel family: hanging posts, insulators and mounting bases, making installation and adjustment straightforward.
Design Features
- Die-forged body — dense structure, high load capacity
- Multi-hole face for stepped position adjustment of mounted parts
- Matches the 22-5 hanging post and tunnel base family
- Anti-corrosion finish for the tunnel environment
The product is manufactured under CRCC railway product certification and an ISO 9001 quality management system, with incoming material inspection, in-process control on critical operations and batch-by-batch final inspection before delivery.
Typical applications are installation and alignment points of tunnel OCS support structures. Henan Chuangwit supplies adjusting bases within the tunnel support kit, with selection support against your cross-section drawings. It is the die-forged base plate of tunnel support structures: it carries components such as hanging posts or insulator fittings on a multi-hole adjustment face, so the installed position can be fine-tuned to hold the suspension geometry precisely. Die forging gives a continuous metal grain flow and a dense structure, so the base has high load capacity in a compact size — important where tunnel clearances limit the fitting envelope. The multi-hole adjustment face offers stepped positions for the attached component; combined with slotted connections it covers erection tolerance and later alignment work. With the 22-5 tunnel hanging posts, insulator fittings and other members of the TB/T 2075.22 tunnel support family.Frequently Asked Questions
What does the 22-1A adjusting base do?
Why die-forged?
How is the adjustment done?
Which fittings does it pair with?
Performance
Operating Conditions
Service inside railway tunnels at installation and alignment points of support structures.
Mechanical Performance
Die-forged dense structure gives high load capacity in a compact envelope; multi-hole face permits precise position adjustment.
Applications
Tunnel Support Points
Precise component alignment in confined space.
Urban Tunnels
Compact forged base for metro structures.
Heavy-Load Points
Forged strength at concentrated loads.
Maintenance & Alignment
Step-adjusted positions ease re-alignment.
