Product Details

WJ-7 Fastener System Features:

High flexibility, high insulation, strong versatility of the structure, high pressure attenuation of the elastic buckle and high fatigue strength, reliable connection with the foundation, high and low rail position and large adjustment of the left and right position are needed for the passenger-only line ballastless track fastener system.

Following aspects of the fastener system has been optimized:

Improve the versatility of the fastener structure;
Improve the insulation performance of the fastener system;
Reduce the pressure attenuation of the spring buckle and improve its fatigue strength;
Improve the reliability of the fastener system and the foundation;
Reduce the fastener The rigidity of the system;
Improve the reliability of the T-bolt in the iron pad.

WJ-7 Rail Fastening System Parts Details

Serial number	Name	Quantity	Material	Mass or volume	Remarks
1	T-bolt T1	2	Q235-A	0.76 kg
2	Nut M24	2	Q235-A	0.224 kg
3	Flat Washers	2	Q235-A	0.138 kg
4	W1 type elastic bar	2	60Si2MnA	1.44 kg	Choose one according to the line resistance.
4	X2 type elastic bar	2	60Si2MnA	1.22 kg	Choose one according to the line resistance.
5	WJ7 insulation block	2	Glass fiber reinforced polyamide 66	72.6 cm3
6	WJ7 iron pad	1	QT450-10	10.2 kg
7	WJ7 insulation cushion board	1	Rubber	420 cm3
8	WJ7-A rubber pad	1	rubber	270 cm3	The speed is 250km/h for passenger dedicated lines, and one of them is selected according to the specific requirements of line resistance.
	WJ7-A composite pad		rubber	270 cm3
	WJ7-A composite pad		stainless steel	0.24 kg
	WJ7-B rubber pad		rubber	325 cm3	The speed is 350km/h for passenger dedicated lines, and one of them is selected according to the specific requirements of line resistance.
	WJ7-B composite pad		rubber	325 cm3
	WJ7-B composite pad		stainless steel	0.24 kg
9	Anchor bolt B1	2	Q235-A	2.20 kg
10	Heavy duty spring washer 30	2	65Mn, 60Si2Mn	0.09 kg
11	WJ-7 flat pad	2	QT450-10	0.50 kg
12	Pre-embedded casing D2	2	Glass fiber reinforced polyamide 66	200 cm3
13	WJ7 rail heightening pad		Polyethylene	27.7 cm3/mm	According to the specific situation
14	WJ7 iron pad down the high pad		Rubber	310 cm3/5mm	According to the specific situation

WJ-7 Rail Fastening System Technical Requirements:

Fastener type		WJ-7 fastener
Taxonomy		With iron pad (thickness 16mm)
Withstand lateral force		Mainly overcome by the friction under the iron pad
Connection with the foundation		Embedded plastic casing
Embedded member pull-out resistance		Not less than 100kN
Rail Clip	Types	W1 type	Type X2
	Buckle pressure	>9kN	6kN
	Strike	14mm	12mm
	Fastening method	Bolt fastening
	Tightening torque	About 120 Nm	About 80Nm
Rail longitudinal resistance		>9kN	4 kN
Rail pad fastening torque		300～350Nm
Elastic Rail Insulator	Setting	An elastic cushion layer (rubber pad or composite rubber pad) is arranged under the rail, and a cushion layer (insulation cushion pad) is arranged under the iron pad plate.
	size	Class A	Class B
		Under-rail rubber pad: 169×168×12 (composite thickness 13.2)	Rubber pad: 169 × 168 × 14 (composite thickness 15.2)
		Insulation cushion plate: 486 × 204 × 5
Under-arc cushion stiffness		30～40kN/mm	20~30kN/mm
Sub-layer cushion stiffness		>1000kN/mm
Rail height	High rail surface	Class A	Class B
		211 rubber pad 212.2 composite pad	213 rubber pad 214.2 composite pad
	Adjustment amount	30mm
	Adjustment method	The adjustment of 10mm and 20mm is achieved by inserting the heightening pad between the rail and the iron pad and between the iron pad and the foundation. The filling pad can be adjusted steplessly.
gauge	Adjustment amount	±12mm
	Adjustment method	This is achieved by moving an iron pad with a long round hole, without the need for spare parts.
	Adjustment level	Continuous stepless adjustment
Rail joint treatment		General purpose
Applicable to ballastless track		No shoulder-free track structure
Drawing number and standard		Research Line 0603, Science and Technology Base [2007] 207
Application condition		250 km/h	350 km/h passenger dedicated line