LOCK VALVES "ANNOUSHKA" Russian patent published in 2010 - IPC F16K1/12 F16K31/53 

FIELD: mechanical engineering.

SUBSTANCE: lock pipeline valves are intended for installation on straight line horizontal sections of oil pipelines of passage diametre 500 mm and more transporting working medium not loaded with foreign bodies. Lock pipeline valves contain a case, a locking element made in form of a disk and a seat. On the disk there are arranged a spindle with a poppet valve and a rack-and-gear mechanism, a toothed rack of which is rigidly attached to the disk; also different drives successively actuate disk travel and medium flow shut off. Supports limit travel of the locking element-disk. A shock-absorber of thrust is installed on the bottom of the case. A ratchet mounted outside the case fixes disk lifting. A hold-down device consists of a steering control, of a shaft and of a worm pair, from a wheel of which the poppet valve is driven to rotate. The poppet valve rotating in thread of the spindle moves progressively along axis of the pipeline till contact with the seat and locks flow of medium. The seat is pressed into the case and is tapered in the place of valve fitting place at angle of 45 deg.

EFFECT: design facilitates reduced weight and dimensions of lock valves, ensure free flow of transported medium thereby decreasing hydraulic resistance.

8 dwg