41results about How to "Short opening and closing time" patented technology

The invention discloses a valve rod for a high-temperature high-pressure stop valve and a machining method of the valve rod. The valve rod comprises main valve rod, a valve ball cap fixedly disposed at one end of the main valve rod, and a valve ball disposed in the valve ball cap in a free rotation manner. One end of the valve ball protrudes out of the valve ball cap. A spherical center of the valve ball is located on an axis of the main valve rod. The machining method includes machining the valve ball cap, welding the main valve rod, machining the inner spherical face and the valve rod, and assembling the valve ball. By the valve rod which is simple in structure, airtightness, impact resistance, corrosion resistance and operation reliability of valves in high-temperature high-pressure environments are improved.

The invention provides a valve. The valve comprises a valve body, a pair of valve plates, a driving mechanism and a moving piece, wherein the valve body is provided with a front channel, a rear channel and a valve cavity; the front channel communicates with the rear channel by the valve cavity; the pair of valve plates is positioned in the valve body and is pivotally connected to a fixing plate ofthe valve body; the driving mechanism comprises a cylinder and a pair of guide columns; the cylinder is fixed on the valve body; the pair of guide columns is movably arranged on a top cover of the valve body; the upper parts of the pair of guide columns are separately connected with an extension shaft of the cylinder; and the moving piece is fixedly mounted on the lower parts of the pair of guidecolumns and is in contact with the pair of valve plates. The valve is novel in structure; and during working, an operator enables the cylinder to work so as to drive the moving piece to move vertically, and then the valve plates are driven to rotate around a hinged shaft to open and close a valve opening. Therefore, the valve has the advantages of simplicity in operation, short opening and closing time, capability of controlling the amount of water flowing through the valve and long service life.

The invention provides an ultra-clean proportional valve, which has an ultra-clean flow chamber, and a magnetic drive assembly is arranged through the cooperation of an embedded permanent magnet and an external control permanent magnet, and the opening and closing of the valve port is realized by using the principle of minimum magnetic resistance, and the position of the valve port can be adjusted. Accurate control is achieved; the magnetic drive assembly of the present invention has a small actuating distance, shortens the opening and closing time of the valve port, and has a fast response speed; it can apply driving forces in two directions to the valve core, avoiding the problem of relying on fluid impact force to open the valve core. The problem of poor reliability; the magnetic induction lines of the magnetic field form a closed loop, which has little interference to the outer space of the magnetic field, and also avoids the influence of magnets in the environment on the present invention.

The invention discloses a novel valve well valve which comprises a gate plate, a valve body, a lower supporting base, supporting rods, an upper supporting base, pull rods, a top arm and a pull arm, wherein the valve body is fixedly mounted on a tube opening of a blow-down tube in a valve well, and an emptying tube is arranged on the well wall opposite to the blow-down tube; the supporting rods are separately mounted on side corner positions of the top surface of the valve body; the upper ends of the supporting rods are connected with the upper supporting base in a penetrating mode, and the middle parts of the supporting rods are connected with the lower supporting base in the penetrating mode; the pull rods are mounted at the two ends of the pull arm; the pull arm is in blocking connection with the gate plate through a blocking slot, and is connected with the gate plate through a penetrating pin; and the top arm is arranged above the upper supporting base, and is connected to the upper ends of the pull rods in the penetrating mode. The valve is simple in structure, is low in manufacturing cost, is long in service life, is simple to mount, is convenient to maintain, is free of repair, is low in opening or closing labor intensity, is high in working efficiency, and is free of hidden danger in aspect of safety, completely can overcome the defects caused by a conventional valve well valve, meets application needs, and changes the condition that an existing technology is laggard.