6results about How to "Small opening and closing torque" patented technology

This invention discloses a vertical cylinder double eccentric ball joint linkage vacuum check valve and method. The check valve includes a valve body, double eccentric valve discs, a valve stem, a valve cover, a vertical cylinder, and a valve disc shaft support. The valve body has a valve seat hole, and the double eccentric valve discs are rotatably mounted on the valve body via the valve disc shaft. An arc-shaped contact surface is integrally formed on the outer side of the valve discs. Balls are embedded at the bottom of the vertically arranged valve stem, and the balls roll in contact with the arc-shaped contact surface. The valve cover is sealed and fixed to the upper end of the valve body. The vertical cylinder is vertically mounted on the valve cover, and its piston rod is rigidly connected to the valve stem coaxially. The valve disc shaft support is symmetrically fixed to the valve body and supports the valve disc shaft. This solution uses a vertical cylinder coaxial drive combined with ball rolling transmission, eliminating the traditional hard top pressure friction and significantly reducing the opening and closing resistance. The double eccentric valve discs rotate stably, and the closing response speed is faster, effectively solving the defects of slow valve closing and severe seal wear in traditional check valves. The overall assembly is stable and suitable for the long-term airtight operation requirements of industrial negative pressure vacuum systems.

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.

The utility model discloses a low-torque gate valve, which relates to the technical field of valves, and comprises a valve body, a valve rod, a valve seat and a gate plate, the valve body is provided with a medium channel, the gate plate is movably arranged in the valve body along the direction perpendicular to the medium channel, the valve seat is arranged in the medium channel and can form sealing fit with the gate plate, and the valve rod is arranged in the valve body. The gate plate is formed by connecting a left gate plate and a right gate plate in a rotary inserting mode, a driving groove is formed in the middle of the two gate plates, an opening mechanism is arranged in the driving groove and comprises a supporting plate and a crank, and the supporting plate is in transmission connection with the bottom of the valve rod through the crank. The valve rod moves up and down to drive the supporting plate to be away from the side wall of the driving groove or abut against the inner wall of the driving groove so as to open the double gate plates. When the gate valve is opened or closed, no friction exists between the gate plate and the valve seat, the opening and closing torque of the valve is reduced, and the service life of the valve is effectively prolonged.

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.