Other

Nikolai Makarovich Dergachev

Viktor Senderovich Lifshits

Vladimir Nikitich Baranov

Arkady Alexeevich Pevnev

Leonid Pavlovich Shklyanov

Georgy Nikolaevich Petrov

Tamila Iosifovna Osinskaya

Oleg Sergeevich Papkov

Vladimir Ivanovich Khomenko

Llonid Pavlovich Shklyanov

Alexandr Alexandrovich Sukhanov

Olimpiada Mikhailovna Brjukvina

A welding apparatus employing a self-contained pumping accumulator plant hydraulically associated with a hydraulic ram of a moving clamp transfer gear for gripping pipes being welded. The apparatus employs a device for decreasing the pressure in the hydraulic ram and in a pilot valve during flashing and for increasing pressure during upsetting. The apparatus also employs a a low-pressure high-capacity pump with a filter, a relief valve, a nonreturn valve and an unloading slide valve, two high-pressure low-capacity pumps and a device for cutting the pumps and the unloading slide valve in and out. The pumping accumulator plant and the high-pressure pumps communicate with a main oil plant; a hydraulic control of the slide valves of the clamp hydraulic drives is connected to the pumping accumulator plant. The pilot valve is controlled by a welding process program control actuator.

Resistance type flash butt welder

The machine disclosed is provided with a manipulator which aligns and moves pipes in course of welding and incorporates a hollow rod for the movement of the manipulator relatively to the pipe joints. The rod is immovably attached to the body of the manipulator and is provided with a partition subdividing the rod bore into two spaces. One of the spaces is intended to be filled with a working fluid and the other accommodates on the partition a hydraulic system for feeding and controlling both actuators of pipeholding clamps and a means for moving the pipes in the course of welding, the means comprising hydraulic cylinders whose bodies are immovably attached to the body of a movable aligning unit between hydraulic cylinders which are mounted on the unit to actuate the clamps holding fast one of the pipes being welded whereas piston rods of the hydraulic cylinders that move the pipes are immovably attached to the body of the manipulator insulated electrically from an immovable aligning unit. It is expedient to use the machine disclosed for welding bigbore pipes into a continuous pipeline. The layout of said machine provides for quick withdrawal and replacement of hydraulic actuating cylinders without taking apart the welding manipulator. This feature adds to the number of purposes the machine can serve, promotes its serviceability and repairability.

Machine for the resistance butt welding of pipes by fusion

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Moskovskaya oblast, undefined

Nikolai Makarovich Dergachev