MULTIPURPOSE VALVE Russian patent published in 2005 - IPC

FIELD: valving.

SUBSTANCE: valve has a housing provided with inlet and outlet passages. The housing receives two gates connected with the rod which is set in motion by an actuator. The first gate is a relief gate and is made of an additional rod provided with groove, collar, and sealing surface at the end. The rod is set in the through axial opening inside the housing. The beginning of the rod is mounted in the inlet passage. The additional rod is mounted for permitting axial movement and locking at the end positions. The end of the relief gate with collar and sealing surface is coaxial to the second gate which is the multipurpose gate valve. At the first end position, the relief gate valve cooperates with the sealing member and overlaps the relief orifice in the multipurpose valve. The gate valve is provided with sealing surface and mounted in the seat with the sealing member. The seat is piping and provided with openings arranged upstream of the sealing member. The inner diameter of the piping section upstream of the sealing member is mating to the outer diameter of the multipurpose gate valve. The gate valve is mounted for permitting axial movement with the use of the additional rod along the piping section of the seat off the sealing member. The central section of the housing is provided with the radial groove which receives the rod having the groove at its end. The groove receives the short arm of the L-shaped lever connected with the rod. The lever is mounted on the axle for permitting rotation around it. The stop is mounted at the end of the long arm of the lever and cooperates with the groove of the additional rod. The housing has openings through which the inlet passage is connected with the outlet passage when the multipurpose gate valve is open.

EFFECT: simplified structure and enhanced reliability.

2 dwg