CLAMP TYPE POINT MACHINE FIXED ON THICK WEB SWITCHES

STOCK RAIL BRACKET

SWITCH RAIL BRACKET

LOCK ARM

LOCK BAR

Advantages of thick web switches point

• It ensures and proves the proper setting of both stock and switch rails.

• Due to the 160mm opening of thick web switch (TWS ) at toe the clearance at junction of rail head (JOH) is 60mm. This prevents the repeated striking of the open switch at junction of rail head (JOH) by inner side of the wheel, which in conventional switches leads to chances of under wheel flashing.

• Clamp locking of the switch prevents vibration caused in the switch due to train movement affecting the friction clutch directly. In conventional switches this leads to reduction in efficacy of the friction clutch.

• In a TWS in case of obstructions like stone pieces coming between switch and stock rail, the chances of obstruction clearing by falling down are more as compared to conventional points in which the obstruction can get lodged in because of small space between switch and stock rail.

• Due to complementary tapers in switch and stock rail, the switch rail toe fits underside the stock and therefore the wheel of the train engages the switch rail well after 6" from toe. Therefore, damage and wear and tear of the switch is prevented.

Advantages of thick web switches point

SALIENT FEATURES OF POINT MACHINE

• stock / throw The point machine- 220 mm

• The switch opening is -160 mm.– No stretcher bars– The independent moments of switch rail

• Dual locking of switches – Physically clamp locking with stock rail– conventional locking in side machines

First 60 mm strock

1) Open switch moves 60 mm towards its stock rail

2) Used for unlocking of locked close switch

Next 100 mm throw

1) Both tongue rail moves together by 100 mm

2) open switch is closed now & completed its (100mm +60mm) movement.

Next 60 mm throw

1) Closed switch gets locked. 2) Open switch moves 60-mm & open

by 160 mm and locked .

Distribution of 220mm stroke

SALIENT FEATURES OF THICK WEB SWITCHES POINT

• The switch opening is -160 mm • No ‘P’ bracket, the ground connections are

directly fixed on switch rail

• No stretcher bars

• No bolting of stock rail to chair plate

• Use of spring setting device

NO STRETCHER BARS & OPENING 160MM

160mm

No bolting of stock rail to chair plate

spring setting device

spring setting device

Sleeper Nob- 13 OR 14

Insulation

components of clamp type point machine

• Stock rail bracket • Switch rail bracket

• Lock arm

• Lock bar

SWITCH RAIL BRACKET

SWITCH RAIL BRACKET HOLES PARAMETERS

745 mm

450 mm80 Mts

428 mm70 mm

55mm

140mm (LH )OR

200 mm (RH )

328mm (LH )OR

272 mm (RH )

SWITCH RAIL & STOCK RAIL BRACKET HOLES PARAMETERS

745 mm

450mm

80 mm

428 mm70 mm

76mm

55mm

STOCK RAIL BRACKET

STOCK RAIL BRACKET

450 mm

80 Mts

428 mm

55mm

LOCK ARM

clamped LOCKED OPEN SWITCH

clamped LOCKED CLOSE SWITCH

DIFFERENCE BETWEEN MOTORS

• The motor of IRS high stroke machine and low stroke machine have same electrical parameter

Crank handle contact assembly

Reduction Gear

Power Terminal

Commutator & brushPinion

TECHNICAL SPECIFICATIONS OF THE POINT MACHINE.

Sr Nob

1 Motor 110V DC2 Power 0.44 KW3 Throw 220 mm4 Max. Thrust 450 kg5 Max. operating current 5.5 Amps6 Weight of machine 210 kg7 Slipping load 700 Kg