YJA160 Hydraulic Rail Clamp | 160kN Windproof Clamp - Exhibition

YJA160 Hydraulic Rail Clamping Device

160 kN clamping force · 80 kN anti-slip force · 3 mm clearance · Spring-apply / Hydraulic-release · For outdoor rail cranes, trolleys, stacker-reclaimers & conveyor trippers

160 kN clamping force 80 kN against-slip force Spring clamp · hydraulic release End-face flange connection Float ±20 mm H / ±20 mm V Release limit switch + travel interlock QU100 / QU120 rail class

1. Why specify YJA160

Fail-safe by spring: hydraulic power opens the jaw; spring force clamps the rail. Power loss, storm, E-stop → rail clamp auto-engages.
Travel interlock: trolley travel circuit can only be enabled after the clamp is fully released - no "dragging the clamp down the rail" accident.
Anti-wind + positioning: holds outdoor cranes/trolleys against gusts in non-working state, and locks conveyor trippers / shuttle cars in working state.
Float structure: caliper floats ±20 mm horizontally and ±20 mm vertically, tolerating rail misalignment and trolley skew.
Corrosion-resistant: outdoor coast/port paint system, suitable for wharf, stockyard, power plant coal yard.

2. Model decoding

Code	Meaning
YJA	Hydraulic rail clamp, spring-apply / hydraulic-release family
160	Rated clamping force 160 kN (against-slip force 80 kN)

YJA160 is the smallest YJA size. Bigger sizes: YJA200 / 250 / 315 / 400 / 560 / 600 / 800 / 1000 / 1200. Clamping force ≠ anti-slip force - always quote both. YJA = end-face flange; YJD = top-surface flange.

3. Rated data - YJA160

Parameter	Value	Note
Clamping force	160 kN	spring-applied
Against-slip (holding) force	80 kN	rail friction / shoe grip
Clearance / opening	3 mm	jaw retreat after release
Release mode	hydraulic power unit	pump motor + solenoid valve
Apply mode	spring	automatic on power loss
Power unit drive	3-phase AC380V 50Hz (460V 60Hz on request)	control AC220V / 270V options
Operation mode	intermittent, short-time, low frequency	not continuous cycling
Float	horizontal ±20 mm, vertical ±20 mm	caliper body floatable
Connection	end-face flange	YJD uses top-surface flange
Rail	QU100 / QU120 class (confirm shoe profile)	custom rail on request
Ambient	−20 °C … +40 / +50 °C	low-temp hydraulic oil for cold ports
Switch	release limit switch, travel interlock	closed-position switch optional
Unit + hanger weight	≈ 680 + 250 kg (clamp + power pack/hanger)	per sample drawing [2,9](@ref)

5. How it works

Release (machine may travel)

Before travel, pump motor + solenoid valve energize → pressure oil enters cylinder front chamber → piston compresses spring → jaw opens. Fully-open limit switch cuts pump motor, solenoid holds pressure via check valve, and the trolley travel interlock is allowed to close. [3](@ref)

Clamp (storm / stop / power loss)

Solenoid de-energizes → oil returns to tank → spring pushes the jaw onto the rail → 160 kN clamp / 80 kN anti-slip holds the machine. Even with minor internal leakage, the limit + timer auto-top-up the cylinder while travel remains interlocked. [3](@ref)

6. YJA rail clamp matrix

Model	Clamping force	Anti-slip force	Use
YJA160	160 kN	80 kN	small trolley / tripper / light gantry
YJA200	200 kN	100 kN	mid trolley / portal crane
YJA250	250 kN	125 kN	stacker-reclaimer aux
YJA315	315 kN	160 kN	medium gantry
YJA400	400 kN	200 kN	quay crane / ship loader
YJA560–1200	560–1200 kN	280–600 kN	large bucket-wheel / reclaimer

7. YJA160 vs YJD160 vs YJE160 (if exists)

Item	YJA160	YJD160	YJE series
Mount	end-face flange	top-surface flange	electric-hydraulic family
Clamp/anti-slip	160 / 80 kN	160 / 80 kN	different force ladder
Best for	standard trolley bracket	top-mounted frame	electric release variants

8. Applications

Container gantry / RTG / quayside crane rail anchoring
Stacker-reclaimer, bucket-wheel machine, traveling tripper car
Outdoor overhead crane trolley anti-wind locking
Belt conveyor tripper car position braking
Power-plant coal yard, port wharf, steel-mill outdoor rails

9. Installation rules

Confirm rail head profile (QU100/QU120/custom) before machining jaw plates.
Mount on rigid bracket; rail clamp float is for alignment, not for absorbing structural deflection.
Hydraulic power pack: 380V/50Hz std; other voltages must be stated on PO.
Interlock wiring: trolley travel allowed ONLY when "fully released" limit is made.
Fill power-pack oil to level; bleed air; test open/close 5 times before load.
Manual pump (if fitted on small YJE/YJJ) is emergency release only, not daily operation.

10. Maintenance & replacement limits

Interval	Check	Replace / act if
Daily	jaw position, limit signal, oil leak	no "released" signal → block travel
Monthly	rail contact face, spring, hose, terminals	jaw insert worn → re-machine / replace
6 months	hydraulic oil, relief setpoint, interlock test	milky/dark oil → drain + flush
Annual	clamp force check, flange bolts, corrosion	bolt grade/looseness → re-torque / replace
2–3 years	seal kit, spring fatigue, valve coil	slow release / pressure drop → overhaul pack

11. Troubleshooting

Symptom	Cause	Action
Won't release	no pump power / solenoid fault / low oil	check 380V, solenoid, oil level
Travel interlock won't close	limit not made / jaw not fully open	adjust limit, bleed cylinder
Clamp slips in wind	jaw worn, rail greasy, force too small	clean rail, replace insert, upsize model
Oil weep at hose	fitting loose / seal aged	re-torque, replace seal kit
Pump runs hot	relief stuck, over-cycle, wrong voltage	check duty, relief, supply

12. RFQ block

Model: YJA160
Clamping force: 160 kN
Anti-slip force: 80 kN
Rail: QU100 / QU120 / custom profile: ___
Mount: end-face flange (YJA) / top flange (YJD): ___
Power pack: 380V50Hz / 460V60Hz / control 220V: ___
Switches: release limit / closed limit / wear limit: ___
Float: ±20H/±20V std / special: ___
Paint: C5-M marine / std outdoor: ___
Qty: ___

Quotation note: YJA160 = 160 kN clamp / 80 kN anti-slip, not "160 kN holding". Rail profile, flange type, power-pack voltage and interlock logic must be on the PO. YJA is end-face flange; if the customer's frame is top-mounted, switch to YJD160.

Refs: YJA series basic parameters 160/80 kN [4,5](@ref); working/interlock logic [3](@ref); YJA160 dimensions 820/710/630, 710 kg + 680/250 kg pack [2,9](@ref); application: outdoor rail cranes, trolleys, stacker-reclaimers, conveyor trippers [6,8](@ref).