Product Description
In order to meet the requirements of less-maintenance track structures, type III rail fastener system has been developed, which is similar to the e-type fastener of PANDROL. Type III (WJ-4) fasteners consist of spring bars, embedded iron seats, insulating gauge blocks, and rubber pads. Concrete sleepers do not have shoulders and are boltless fasteners. Gauge pads can be used to adjust the gauge.
E-shaped elastic clips are used, with a diameter of 20mm, a travel range of 13mm, and an initial buckle pressure of 11 kN. The embedded iron seat of the sleeper and the spring bar are installed on the iron seat without bolt connection. Gauge pads can be used to adjust the gauge. The present invention is suitable for laying 60kg/m rails and Type III E Shape Rail Clips on straight lines or curves with a radius of R>350m on standard gauge railways.
Note: The fastener cannot adjust the height of the rails.
Design parameters:
1. The initial buckle pressure of a single spring clip is not less than 11.0kN; the spring range is 13mm;
2. The horizontal resistance is 100kN static load, 70kN fatigue load, and 2 million load cycles; the gauge expansion value is less than 2mm, and the 4.3 fastener components are not damaged; the vertical static stiffness of each fastener node is 60kN/mm~80kN/mm;
3. The gauge is adjusted by changing the insulating gauge block, and the gauge adjustment amount is -8~4mm; the pull-out resistance of the embedded iron seat is not less than 60kN; the height adjustment amount of this fastener is 0.
4. Type III fasteners use cast shoulders embedded in concrete sleepers to maintain track gauge, withstand lateral forces, buckle rails with spring bars, and use nylon blocks as insulating components and to adjust track gauge.
Mechanical Requirements
Parts of Type III rail fastening system.
Mechanical requirements for fastener components:
Single spring range 13 mm, buckling pressure ≥ 11 kN;
Single rail left and right position adjustment: -4 ~ +2 mm, track gauge adjustment: -8 ~ +4 mm;
The pull-out force of the embedded iron seat should not be less than 60 kN.
Performance of type III rail clip:
Fastener name/performance index | Type III Rail Clip |
Initial buckling force of a single spring clip (KN) | ≥11 |
Deformation of spring clip (mm) | 13 |
Longitudinal anchor resistance (KN) | 17.6 |
Vertical static stiffness of buckling node (KN/mm) | 60~80 |
Gauge adjustment amount (mm) | -3~+4 |
Height adjustment amount (mm) | 0 |
Features & Advantages
This railway fastener is a boltless and shoulderless fastener.
Features:
1) Contains relatively few parts and has a compact structure
2) The structure is dense to reduce lateral movement
3) Low maintenance workload
4) Used on straight or curved tracks of standard gauge (radius not less than 350 meters)
Advantages of Type III elastic fasteners:
1) Elastic Type III fasteners have the advantages of high clamping force and good elasticity;
2) The concrete sleeper shoulder is eliminated, thereby eliminating the possibility of lateral movement of the rail bottom under the action of lateral force, resulting in the expansion of the track gauge, so the ability to maintain the track gauge is very strong;
3) The rail clamp has a strong fastening ability. Since the bolt connection method is eliminated, the maintenance workload of the fastener is greatly reduced;
4) It is especially suitable for lines using large-scale machinery.
Application
Type III elastic clip fastener system is suitable for seamless track and shoulderless Type III prestressed concrete sleepers with 60kg/m rails laid on straight lines or curves with a radius of R ≥ 350 m on standard gauge railways.
