22-4A Tunnel Registration Bracket
Multi-hole registration seat for tunnel support structures, connecting positioning parts to hold the contact wire position.
Specifications
| Model | 22-4A |
|---|---|
| Drawing No. | 22-4A |
| Standard | TB/T 2075.22-2024 — Part 22: Tunnel support and positioning devices |
| Installation | Mounted on tunnel support structures, connecting positioning parts for contact wire registration |
The 22-4A tunnel registration bracket is the positioning connection seat of tunnel support and positioning devices. Mounted on the tunnel wall support structure or on a hanging post, it joins the positioning tube and locator through multi-directional adjustment holes, holding the contact wire at its design position within the confined tunnel cross-section.
Its multi-hole adjustment face adapts to different tunnel cross-sections and assembly directions, and the interfaces match the standard positioning tube and locator family, so tunnel registration uses the same parts vocabulary as open-route registration.
Design Features
- Multi-directional adjustment holes suit tunnel cross-section conditions
- Standard interfaces with positioning tubes, locators and hanging posts
- High connection stiffness keeps the registration position stable
- Anti-corrosion finish for the humid tunnel atmosphere
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.
Henan Chuangwit Railway Equipment Co., Ltd. supplies this locator with selection calculations, matched fittings and site technical guidance for traction power projects. On the tunnel wall support structure or on a tunnel hanging post (22-5), where it connects the positioning parts that hold the contact wire at its design position. The bracket carries multi-directional adjustment holes, so the connected positioning parts can be set precisely to the tunnel cross-section design and re-aligned later. Yes — the connection interfaces match the standard positioning tube and locator family, so the same registration hardware is used inside and outside tunnels. TB/T 2075.22-2024, Fittings for overhead contact system of electrified railway — Part 22: Tunnel support and positioning devices.Frequently Asked Questions
Where is the 22-4A bracket mounted?
How is the registration position adjusted?
Does it work with the open-route positioning parts?
Which standard does it follow?
Performance
Operating Conditions
Service inside railway tunnels and open-cut sections with restricted clearance and humid atmosphere.
Mechanical Performance
Multi-hole face permits precise registration setting; connection stiffness holds position under pantograph-induced dynamics.
Applications
Low-Clearance Tunnels
Registration within confined tunnel envelopes.
Urban Tunnels
Adapts to metro cross-section geometry.
Hanging Post Mounts
Pairs with 22-5 posts and bow cantilevers.
Humid Environments
Anti-corrosion finish for damp service.
