4results about How to "Small opening and closing torque" patented technology

The utility model discloses a high-temperature and high-pressure hard sealing three-eccentric center butterfly valve, and relates to the field of butterfly valves. In petrochemical engineering, electric power and other high-temperature and high-pressure industrial scenes, a traditional butterfly valve has the problems of sealing failure, large friction torque, influence of thermal expansion on pre-tightening force and the like. The three-eccentric butterfly valve comprises a valve body, a valve rod, a valve plate, a valve seat and a bottom end cover, the axis of the valve plate, the axis of the valve rod and the sealing face of the valve seat form a three-eccentric structure, the valve plate comprises a plate body, a metal winding gasket, an elastic sealing ring and a pressing ring, and the outer circumferential face of the elastic sealing ring and the inner circumferential face of the valve seat serve as sealing faces for closing the butterfly valve. Zero-friction contact type sealing is achieved in the closing process of the valve through the three-eccentric structure, the sealing life is greatly prolonged, the opening and closing torque is reduced, the leakage problem caused by uneven sealing and machining errors of a traditional butterfly valve is solved through the double-sealing combination of the metal winding gasket and the elastic sealing ring, and the sealing performance of the butterfly valve is improved. The sealing stability and reliability are effectively improved, and the service life is prolonged.

The improved balance valve element and the valve with the improved balance valve element are simple in structure and convenient to open, close and adjust, the improved balance valve element comprises a valve body, a valve deck arranged on the valve body, water inlet channels, water outlet channels and a valve seat arranged between the water inlet channels, the water inlet channels and the water outlet channels are formed in the valve body, and a valve rod is arranged on the valve deck in a penetrating mode. The valve rod is provided with a valve core used for sealing the valve seat, and is characterized in that the valve core comprises a valve core body, the valve core body is arranged in a piston type sleeve manner, one end of the valve core body is provided with a valve core rod connected with the valve rod, and the other end of the valve core body is provided with a sealing cylinder sealed with the valve seat; and a labor-saving device for reducing the overflowing area so as to save the opening and closing force is arranged between the sealing cylinder and the valve core body.

This utility model discloses a high-platform ball valve with double sealing. It is characterized by comprising a valve body and a valve cover disposed at one end of the valve body. A first soft seal is provided at the contact surface between the valve body and the valve cover, and the first soft seal is disposed within a groove formed in the valve body. A first hard seal is also provided at the contact surface between the valve body and the valve cover, and the first hard seal is disposed inside the soft seal. This utility model achieves double sealing of the sealing parts in the ball valve, significantly improving reliability.

The utility model discloses a streamline reinforced valve plate, relates to the technical field of valves, and solves the problems that a traditional valve plate is large in fluid impact, high in energy consumption, heavy in structure, easy to vibrate and the like. According to the technical scheme, the incident flow surface of the valve plate is designed to be a continuous and smooth asymmetric streamline curved surface, and the thickness is gradually increased from the incident flow end and then contracts towards the back flow end; the valve plate is of a hollow structure with the hollow interior, reinforcing ribs are arranged in the valve plate, the distribution density of the reinforcing ribs is gradually increased from the rotating center to the edge, the connecting position of the valve rod is the highest, and the cross section can be rectangular, round or triangular. The valve plate and the reinforcing ribs are integrally formed in a casting mode and are made of stainless steel or duplex stainless steel. The effects that fluid impact and energy consumption are remarkably reduced, cavitation and vibration are restrained, light weight and high structural reliability are achieved, and the service life is prolonged are achieved.