Type II Rail Fastening System

Product Description

The type II rail fastening system consists of nuts, flat washers, type II elastic rail clamps, gauge baffles, rail plastic insulators, spikes, and rail pads.
In order to improve the strength and clamping force of the spring clip, high-quality spring steel 60SiCrVA is selected as the material of the type II spring clip, and the yield strength and tensile strength are increased by 42% and 36% respectively. The diameter of the spring clip is the same as that of the type I fastener, which is 13mm.

Design parameters

The buckle pressure of a single spring clip of the Type II (WJ-3) fastener system is 10 kN, the spring range is 10 mm, and the static stiffness of the rubber pad under the rail is 55-80, 40-60 kN/mm (rail joint section). In the section where the Type I spring clip was originally used, the Type II spring clip can be used to replace the original Type I spring clip, which is suitable for 60 and 50 kg/m rails. Except that the spring clip is designed with new materials, the other parts are common to the Type I clip system, and its spring range is increased from 8mm to 10mm, and the initial buckle pressure is increased from 8.2 kN to 10kN.

Additional information

Delivery Time	25-40 days, 7 days for stock goods
Loading Port	Shanghai ,Tianjin, Qingdao
Offer Ability	5000+units/Per Month
MOQ	100 Units
Packaging Details	Each woven bag is less than 25KG. Fumigation-free pallet. Customers can specify the method

Specifications

Fastening type		Type II Rail Clip
Fastening Methods		Elastic-not seperated
Withstand lateral forces		Suspended by the sleeper shoulder
Rail pad connecting method		Sulfur anchor rail spike
pull-out resistance of embedded part		not less than 60kN
Rail Clip	Type	ⅡType
	Buckle pressure force	10 kN
	Stretch range	10 mm
	Fastening method	Rail Bolt Fasten
	Tightening torque	about 100～140 Nm
Rail longitudinal resistance		>9 kN
Rail Pad	Set	Single-layer rubber rail pad between rail and sleeper
	Model	60-10-17 60-12-17，
	Size	190×149×10（12）
	Static stiffness	55～80 kN/mm
	Standard	TB/T2626
Steel Rail Height	Rail surface height	186mm
	Adjustment amount	10 mm
	Adjust position	Under the rails, adjuast rail pad height
gauge	adjust amount	-12～+8 mm
	adjust method	Adjust by replacing different numbers of gauge and baffle seats
	adjust level	2mm
Rail joint processing		60kg/m steel rail, no treatment
Applicable Rail Sleeper Type		Ⅲa concrete blocks sleepers
Drawing number and standard		TB/T 3065
Application conditions		120～200 km/h
		Conventional resistance section

Mechanical Requirement

Type II rail fastening system has its mechanical requirement and performance.

Fastener Parts Mechanical Requirement：

Buckling pressure of each set of fasteners ≥ 20 kN;
Longitudinal resistance of each set of fasteners The number of rails is not less than 9 kN;
The fastener system should not be damaged after 3 million load cycles, and the gauge should be less than 6 mm;
Left and right position adjustment of a single rail: -8 ~ +6 mm, gauge adjustment: -16 ~ +12 mm; rail height adjustment: 10 mm;

Performance of Type II Rail Clip:

Fastener name/performance index	Type II Rail Clip
Initial buckling force of a single spring clip (KN)	≥10
Deformation of spring clip (mm)	10
Longitudinal anchor resistance (KN)	16
Vertical static stiffness of buckling node (KN/mm)	60~80
Gauge adjustment amount (mm)	-8~+12
Height adjustment amount (mm)	≤10

Product Optimization

Based on the type II railway fastener system, the type II split rail fastener system is designed.

Design features:

1. Separate screw holes are set at both ends of the ribbed base plate, which are connected to the sleeper/track plate with turnout bolts.

2. The ribbed base plate is provided with a T-bolt insertion seat and a shoulder, and the spring bar is fastened by tightening the nut of the T-bolt.

3. Use rail blocks and buffer adjustment blocks of different sizes to complete horizontal and lateral adjustments.

4. The height adjustment pad can be inserted to achieve rail height adjustment.

Structural features:

The spring bar II elastic split rail fastener system is an elastic split fastener with an iron pad. Its main structural features are:

① Rubber pads are installed between the rail and the iron pad and between the iron pad and the foundation, double-layer vibration reduction;

② Type II spring bars are used as buckling parts, and Type I fasteners and Type B spring bars can also be installed;

③ T-bolts are inserted into the iron seat on the iron pad, and the spring bars are tightened by tightening the nuts of the T-bolts;

④ Gauge blocks are set between the T-bolts inserted into the iron seat and the rail to adjust the gauge, and the gauge adjustment amount is -8 to +4 mm;

⑤ Bolt holes are opened on the iron pad, and the anchor bolts cooperate with the insulating sleeves embedded in the concrete foundation to tighten the iron pad; spring washers are set between the bolts and the iron pad;

⑥ The height adjustment of the rail is achieved by inserting height adjustment pads under the rail and under the iron pad. The adjustment amount under the rail is 10mm, and the adjustment amount under the iron pad is 10mm, and the total adjustment amount is 20mm.

Application

It is mainly used for prestressed concrete sleeper tracks with 60kg/m rails laid on straight lines and curves with a radius of R≥300M on standard gauge railways. It has great advantages in ensuring track gauge and preventing rail creep, and can be laid on heavy-load and speed-up lines.
Its operating conditions are: annual total weight 60Mt.km/km~100Mt.km/km; locomotive axle weight is not more than 250Kn; freight car speed is not more than 120km/h, and passenger car speed is not more than km/h; the initial buckle pressure of a single spring bar is not more than 10.0Kn; elastic range is 10mm.

Why Use Type II Elastic Clip Fastening System:

Elastic clip type II fasteners are developed to address the shortcomings of elastic clip type I fasteners. The Ministry of Railways Scientific Research Institute and the Professional Design Institute jointly developed elastic clip type II and type III fasteners that match the new sleepers. Design parameters: The pressure of a single elastic clip is not less than 10KN, and the elastic range (i.e. elastic deformation) is not less than 10mm, which is about 30% higher than that of type I fasteners; after the assembled fasteners are subjected to lateral fatigue load cycles for 2 million times, the components shall not be damaged.