Browse Prior Art Database

Bidirectional Bladder Valve, Controller and Alarm

IP.com Disclosure Number: IPCOM000051374D
Original Publication Date: 1981-Jan-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Scanlon, WJ: AUTHOR [+2]

Abstract

A bidirectional valve capable of automatically purging a line containin liquids or gases is provided. The device has an integral signal unit to trigger a warning lamp if an excessive pressure is detected during purge. Possible uses include purging of slurry lines or other dense liquid lines.

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Bidirectional Bladder Valve, Controller and Alarm

A bidirectional valve capable of automatically purging a line containin liquids or gases is provided. The device has an integral signal unit to trigger a warning lamp if an excessive pressure is detected during purge. Possible uses include purging of slurry lines or other dense liquid lines.

Figs. 1 and 2 are schematic diagrams of the pneumatic and electrical apparatus used to control the valve, as will be described more fully hereinafter.

Fig. 3 shows a cross section of the valve body with latex rubber valve bladders 1 and 3, pressure inlets or ports 5, 7 and 9 and end caps 15 and 17 with the "O-Ring" seals 11 and 13.

Operation of the valve will now be described with reference to Fig. 2. Switch S1 is closed, activating solenoid K3 and time delay network TD1. Solenoid K3 allows air to enter the valve via port 7, as depicted in Fig. 3. Time delay network TD1 allows air passed via solenoid K3 to pass through solenoid K1 and port 5, collapsing bladder 1 for a preset time. After the time delay, solenoid K1 closes and solenoid K2 opens to inflate bladder 1 and collapse bladder 3.

It can be seen that as air successively passes through solenoids K1 and K2, ports 5 and 9 (P1 and P1') are respectively pressurized, collapsing bladders 1 and 3 in sequence and forcing the pressure from port 7 through the opposite ends of the valve. If a blockage should occur in the line being purged, the pressure in the line from solenoid K3...