4 results about "Valve float" patented technology

The application discloses an axial flexible sealing scroll compressor, a driving mechanism is in sealing connection with an upper support, the driving mechanism is connected with a moving scroll, a fixed scroll is in sealing connection with a top end surface of the upper support, a back pressure cavity flexible sealing structure and an anti-rotation mechanism are arranged between the moving scroll and the upper support, the fixed scroll is in sealing connection with an upper shell, a pressure leading channel and a pressure releasing channel are arranged in the fixed scroll, a back pressure valve base and a back pressure valve float are arranged in the fixed scroll, the back pressure valve base is in sealing connection with the fixed scroll, and the back pressure valve float is in axial sliding sealing connection with the fixed scroll. The back pressure valve structure is added in the low-pressure area of the fixed scroll to lead pressure, the temperature change of the working area of the back pressure valve is small, the thermal deformation is small, the leakage probability of the back pressure valve is small, and the back pressure floating effect is good; the back pressure valve is arranged in the fixed scroll, and the machining process is simple; and the axial sealing structure driven by the back pressure valve can greatly improve the operation volume efficiency of the compressor.

The utility model provides a water inlet automatic check valve which comprises a shell arranged on a pipeline, the shell is internally provided with a conveying space, the conveying space communicates with a water conveying cavity of the pipeline, and the shell is further provided with a water inlet; the floating valve has a first state and a second state, when the floating valve is in the first state, the floating valve is located in the water conveying cavity of the pipeline, and when the floating valve is in the second state, the floating valve is located in the shell; and the limiting piece is arranged on the pipeline and located in the water conveying cavity, and the floating valve is arranged on the limiting piece. Through the arrangement of the floating valve, when water in the water conveying cavity in the pipeline is too much, under the action of buoyancy, the floating valve floats into the conveying space of the shell along the limiting piece, then the water inlet is blocked through the floating valve, water in the pipeline is prevented from overflowing through the water inlet, and water in the pipeline is also prevented from being discharged out through the water inlet to cause backflow.

The application discloses a kind of electric devices of valve float brake, belong to valve brake technical field, including the main body mechanism for adjusting the liquid inlet speed of valve, the braking mechanism for braking valve and the conveying mechanism for conveying fluid are arranged in main body mechanism.This application is arranged in the main body mechanism and adopts the three-stage float structure of lower float piece, large float piece and upper float piece, cooperate the switch horizontal plate in switch shell, form segmented liquid inlet control, when the liquid level in inner buoyancy tank rises, large float piece pushes upper float piece to rise, switch horizontal plate is moved in switch shell by switch connecting rod, first make flow passage section to reduce to reduce liquid inlet speed, if liquid level continues to rise, switch horizontal plate will switch shell be completely closed, cut off liquid inlet, when liquid level drops, switch horizontal plate can gradually open again to restore liquid inlet, realize the closed-loop regulation of deceleration liquid inlet when liquid level is high, cut off liquid inlet when liquid level is too high, automatic recovery after liquid level recovery.

An unloading valve for a gas lift system in a wellbore tubular that includes a valve float, an inlet port and outlet port. The valve float has a pointed end to reduce shear stress on the valve float. The inlet port has an inlet valve seat to receive the valve float whereby sealing the inlet port and further includes filleted or chamfered openings to improve fluid flow. The outlet port has an outlet valve seat to receive the valve float whereby sealing the outlet port when a flow exceeds a maximum flow and further includes conical shaped ends to improve fluid flow. The valve float is movably arranged in the flow path between the inlet port and the outlet port and is bidirectionally movable between the inlet valve seat and the outlet valve seat. Furthermore, a bias force act on the valve float directed towards the inlet valve seat.