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Introduction to the Protection Switch Product
To guarantee top-tier safety for trains, protection switches are strategically installed at crucial station points. These switches, activated under predefined conditions, ensure joint operation for enhanced safety. When protection switches are absent in the approach layout, manual or belt manipulation must be employed, followed by locking mechanisms. Circuits meticulously verify turnout positions, ensuring correctness and adherence to specified protective positions. Only then is a comprehensive approach locking and signal activation permitted. Protection turnouts are categorized based on usage and varying protection demands as follows:
For stations with a 6 ‰ downhill inlet (or slightly less where braking remains a challenge), the first turnout group is meticulously engineered for protection. These protective turnouts align with the safety line, special line, refuge line, and more, ensuring maximum safeguard.
As trains proceed past a 6 ‰ downhill slope toward approach terminals, protective turnouts are crucial in averting undesired train momentum—ensuring trains don't surpass outbound signals or veer into unintended approaches. Positioned for access to safety lines, dedicated paths, and refuge lines, these turnouts remain vigilant, driven by circuit controls.
Approach terminals continuing down a 6 ‰ ramp can feature a leveling protection fork. Although manually operated, this fork remains under constant position checks—despite the 6 ‰ incline—especially in outer and approach continuation paths. These turnouts serve to regulate train entry, with visibility restricted to light belts and signals for optimized security.
In areas linked with dedicated lines or during high-intensity shunting operations, protection turnouts are vital. Located at interfaces of main lines, they prevent shunting trains from unintended station line transfers. These turnouts typically position towards the dedicated safety line, shunting train pull-out line, or travel line, ensuring smooth operational flow.
Designed for cross-ferry lines, two groups of double-acting turnouts provide mutual inspection protection. When one group is reversed, the other must remain positioned to prevent cross collisions. In sidestroke processes, buffers manage sidestroke strength, safeguarding the cross-ferry line's integrity, reducing potential sidestroke losses.
| Number | Model | Gauge(mm) | Frog No. | Curve | Radius(m) | Total Weight(kg) |
| 1 | DK612-2-3 | 600 |
No.2 | 3 | 400 | 311 |
| 2 | DK612-3-6 | No.3 | 6 | 6100 | 515 | |
| 3 | DK612-4-12 | No.3 | 12 | 6800 | 573 | |
| 4 | DK612-5-15 | No.5 | 15 | 7400 | ||
| 5 | DK615B-2-3 | No.2 | 3 | 4000 | ||
| 6 | DK615B-3-6 | No.3 | 6 | 6100 | ||
| 7 | DK615B-4-12 | No.4 | 12 | 6800 | ||
| 8 | DK615B-5-15 | No.5 | 15 | 7400 |
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