23-6 Tunnel Limit Frame (Type B/C)
Guide and limit frame restraining the counterweight stack in tunnel compensation systems.
Specifications
| Model | 23-6B / 23-6C |
|---|---|
| Standard | TB/T 2075.23-2024, Fittings for overhead contact system of electrification railway — Part 23: Tunnel anchoring compensation devices |
| Installation | At tunnel anchor points, assembled with anchor arms and pulley sets |
The 23-6 tunnel limit frame is installed at tunnel anchorages to guide and laterally restrain the moving parts of the compensation system — chiefly the counterweight stack — so that they cannot swing, drift or jam as the tension compensation travels.
Manufactured to TB/T 2075.23-2024, Fittings for overhead contact system of electrification railway — Part 23: Tunnel anchoring compensation devices, two constructions cover different installation conditions: Type B, a double-rod frame, and Type C, a guided construction. Both are welded section-steel structures with the rigidity to hold the guiding geometry under load.
The frame is hot-dip galvanized overall for the damp tunnel environment, and its mounting interfaces match the 23-1 anchor arm and the rest of the 23-series tunnel tensioning set, so the complete system installs as matched components.
Henan Chuangwit Railway Equipment Co., Ltd. supplies both frame types under CRCC certification, with type selection against the tunnel's clearance and counterweight travel requirements.
Frequently Asked Questions
What does the limit frame do?
It guides and laterally restrains the moving counterweight stack of a tunnel compensation system so the stack cannot swing or jam and the compensation travel stays smooth.
Which types are available?
Type B (double-rod) and Type C (guided) constructions, selected for the tunnel's load and installation space.
What is the frame made of?
A welded section-steel structure, hot-dip galvanized overall for the damp tunnel atmosphere.
Performance
Operating Conditions
Service in railway tunnels and confined anchoring points, with limited space for counterweight travel and reduced maintenance access.
Mechanical Performance
Restrains the counterweight stack travel in tunnel anchoring: Type B double-rod and Type C guided forms keep the weights running true without swing or jam.
Applications
Tunnel Counterweights
Keeps weight stacks running true.
Type B / C Forms
Double-rod and guided variants.
Swing Control
Prevents weight swing and jamming.
23-Series Sets
Specify with arms and pulleys.
