Double-acting-force blow-down valve

Abstract

Provided is a double-acting-force blow-down valve. The double-acting-force blow-down valve comprises a valve body, a valve deck and a support which are connected in a matched mode, a valve rod is movably connected in the valve body, the valve deck and the support, a bevel gear is connected to the end, arranged on the support, of the valve rod, two gate plates are connected to the end, arranged on the valve body, of the valve rod, and the valve body is internally provided with an inlet end valve seat and an outlet end valve seat which are matched with the two gate plates for use; a limiting part which penetrates into the valve body is arranged outside the valve body. The double-acting-force blow-down valve is reasonable in structure and convenient to use, the integral type valve body is adopted to replace the split-type design, the valve is more compact in structure and light in weight, leakage points outside the valve are reduced, the semi-circular design is adopted by the outlet end valve seat of the valve body, the contact area of the first gate plate and the outlet end valve seat when the first gate plate is closed is decreased, and the goodness of fit of the inlet sealing face can be better guaranteed; meanwhile, the friction force of a medium acting on the gate plates when the gate plates are opened and closed is reduced, the matching requirements between the valve body and the valve seats and between the valve seats and the gate plates are met, it is guaranteed that an inner cavity of the valve body is smooth, free of dead angle and smooth in slagging, and the double-acting-force blow-down valve is worthy of popularization.

Description

technical field [0001] The invention relates to a functional valve, in particular to a double-acting force discharge valve. Background technique [0002] Sewage components and devices are widely used in water ash removal systems, rail steel sheet sewage systems, metallurgical dust sewage treatment, circulating water systems with relatively high slag content, and mining industrial mineral processing, papermaking and other systems. The sewage discharge component device plays the role of cutting off or connecting the gray-water mixture and slag-water mixture in the pipeline. [0003] At present, most of the existing slag discharge device adopts single gate and double wedge design, and the valve seat is pre-tightened and sealed by cylindrical helical spring. During the process of discharging granular impurities, granular slag enters the spring cavity from the back of the valve seat. The spring is stuck and the seal fails; and the slag particles are easy to absorb on the valve s...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the existing slag discharge device adopts single gate and double wedge design, and the valve seat is pre-tightened and sealed by cylindrical helical spring. During the process of discharging granular impurities, granular slag enters the spring cavity from the back of the valve seat. The spring is stuck and the seal fails; and the slag particles are easily adsorbed on the valve seat and the gate wedge sealing surface, and the sealing surface is easy to wear and scratch during the closing process and cannot produce a good seal; and when the valve is closed, the valve There will be residual residue at the bottom of the body and the wear of the shutter of the closing member, which will cause the sealing surface to not fit in place and cause internal leakage. Once leaked, the maintenance and repair of the valve will be extremely inconvenient

The gate is relatively thin and easily deformed, and the maximum pressure is only 6.4MPa, which cannot meet the requirements of higher pressure conditions

Most of the valve body adopts the split valve body design, adding an additional flange connection of the valve body, increasing the weight of the valve body, intangible waste of materials, and increasing the processing procedures during the processing

Images