Valve flashboard with composite tungsten carbide coating

Abstract

The invention provides a valve flashboard with a composite tungsten carbide coating. The valve flashboard comprises a flashboard body, a hand wheel and a limiting protruding block, wherein the hand wheel is connected with the flashboard body through a valve rod, the limiting protruding block is arranged at the lower end of the flashboard body, and the middle of the limiting protruding block is provided with a trapezoid-shaped slot; and the lower end of the limiting protruding block is provided with a fixing frame, and the fixing frame is provided with a rubber strip. The flashboard body comprises a flashboard body layer, the front side of the flashboard body layer is provided with a first wear-resistant layer, and the first wear-resistant layer is the tungsten carbide composite coating; the reverse side of the flashboard body layer is provided with a second wear-resistant layer; the front side of the first wear-resistant layer is provided with a first anti-corrosion layer; and the front side of the second wear-resistant layer is provided with a second anti-corrosion layer. The valve flashboard with the composite tungsten carbide coating has good anti-corrosion wear-resistant performance, and the valve flashboard is simple in structure, convenient to operate and economic and practical.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a valve gate plate with a composite tungsten carbide coating. Background technique [0002] The gate valve is mainly composed of a valve body, a bonnet, a handwheel, a valve stem, a gate, and a valve seat. The valve stem and the stem nut are connected to the connecting groove on the top of the gate. Since the gate of the gate valve is a lifting seal, the gate The longitudinal height of the plate directly affects the arc height of the bonnet. If the longitudinal height of the gate plate can be reduced while the sealing diameter remains unchanged, the arc height of the bonnet can be reduced indirectly, thereby reducing the material of the bonnet. The cost also reduces the height of the overall valve, but generally the front of the gate is a circular sealing surface, and there is a protruding connecting groove on the top, and the inside of the groove is in an inverted T shape. , to ...

AI Technical Summary

Problems solved by technology

[0002] The gate valve is mainly composed of a valve body, a bonnet, a handwheel, a valve stem, a gate, and a valve seat. The valve stem and the stem nut are connected to the connecting groove on the top of the gate. Since the gate of the gate valve is a lifting seal, the gate The longitudinal height of the plate directly affects the arc height of the bonnet. If the longitudinal height of the gate plate can be reduced while the sealing diameter remains unchanged, the arc height of the bonnet can be reduced indirectly, thereby reducing the material of the bonnet. The cost also reduces the height of the overall valve, but generally the front of the gate is a circular sealing surface, and there is a protruding connecting groove on the top, and the inside of the groove is in an inverted T shape. , to reduce the longitudinal height of the gate, only the height of the connection groove can be reduced. For example, for a gate valve with a diameter of 100mm, the thickness of the top of the side of the gate is usually not more than 50mm, and the diameter of the stem nut is not less than 30mm. If the height of the connection groove is directly reduced, then The thickness of the sealing surfaces on both sides is not enough, and there is no space to set up the retaining wall for the lift of the ram, so it cannot be implemented due to the limitation of the thickness of the ram.

[0003] In addition, the valve gates in the prior art are often used in the chemical industry, and do not have good wear and corrosion resistance, resulting in a low service life and increased enterprise costs; moreover, the existing valve gates have complex structures and are difficult to operate. inconvenient

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