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SQ256 Retraction Device 1.4 Construction The retraction device basically consists of a runner rail and carriage. The gas sampling probe, dust removal filter and compressed air valve combination are mounted on the carriage. - The runner rail is produced from square steel tube. On the bottom of the runner rail there is a mechanically protected, rigidly mounted and self-cleaning roller chain track which engages the chain-wheel on the carriage. The runner is mounted with two mounting supports at the beginning and end of the rail. The supports are anchored to the floor. - The carriage, consisting of strong pressed parts, is pushed along the runner rail. Guidance is provided by closely fitting tapered rollers. The tapered rollers have encapsulated ball bearings and are therefore insensitive to dusty ambient conditions. - An induction motor with self-locking worm drive drives the carriage. The drive motor is completely enclosed in a dust-tight, hose-proof housing. Cooling is provided by cooling ribs on its outer surface. - At the second end of the drive-motor shaft there is a pneumatic auxiliary drive connected via a coupling. When mains failure occurs, this enables the probe to be retracting from the kiln. Where a compressed air motor is not present, this function can be handled by a DC motor under battery operation or by a hand crank. - The end positions of the carriage are defined by adjustable limit switches. 1.5 Mode of operation The retraction and insertion processes are activated by: • a manual switch on the retraction device • a voltage-free contact on the central control panel • a signal from the programmable logic controller. The running time for the retraction or insertion process is about 1.5 minutes depending on the length of the probe. In order to prevent dangerous overheating of the coolant during a power failure or when the flow ceases, the probe retraction is facilitated by a supplementary auxiliary drive. The auxiliary motor is immediately started, withdrawing the probe, when one or more phases on the three-phase motor fail. When a pneumatic drive is used, it is switched off in the retract state via a pneumatic limit switch. Copyright ® SIEMENS Page 96 04/04
SQ256 Retraction Device 1.6 Technical data Type: Version 1 for probe lengths 2-3m F6534 Version 2 for probe lengths 1-1.5m F6534 Load rating max 200 kp Electric motor Voltage: 3/400 V~; 3/230V~...3/500V~; + 10%, - 15%; 50...60 Hz Current: 1.7 A Power: 0.55KW Protection: IP 65 to DIN 40050 Compressed air motor Type: Pressure Filter, muffler 6AM-FRV-5A 6 ... 8 bar F33-C8-000 Limit switches Contact rating 380V, 6A, ~ Protection: IP 65 to DIN 40050 Compressed air limit switch Pressure 0 ... 8 bar, 0 ... 116psi, Dimensions: Depending on probe length 5000mm x 500mm x 500mm Weight: 100kg Copyright ® SIEMENS Page 97 04/04
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Copyright ® SIEMENS Page 30 04/04
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SQ251 FLK Gas Sampling Probe Note:
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SQ251 FLK Gas Sampling Probe 1.4 Co
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SQ251 FLK Gas Sampling Probe 2 Inst
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SQ252 Electrically Heated Dedusting
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SQ252 Electrically Heated Dedusting
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