Inter-sheet sealing method for valve sheets of sheet type multi-way directional valve

Abstract

The invention provides an inter-sheet sealing method for valve sheets of a sheet type multi-way directional valve. The sealing method comprises the following steps: S1, cleaning and drying the surface of a valve sheet, which is to be coated with a sealant; S2, assembling sealing elements into sealing grooves, and uniformly coating the flat surface around the sealing elements with a layer of sealant with a brush; S3, selecting a white transparent hard plastic plate which is matched with the sealing surface in size to cover the sealing surface coated with the sealant, and pressing the white transparent hard plastic plate hard against the sealing surface again and again, and observing the condition of the sealant through the white transparent hard plastic plate when the sealant fluid is squeezed by the white transparent hard plastic plate; S4, judging the sealant coating amount, and if the sealant can form a circle of uninterrupted thin film on the periphery of an entire seal ring and does not flow into an oil hole and an oil channel under the pressure of the white transparent hard plastic plate, determining that the sealant coating amount meets a requirement; S5, taking the white transparent hard plastic plate away, and performing assembly according to the requirements of product assembly; S6, cleaning waste sealant with cotton cloth; and S7, placing a finished product in a room temperature environment to cure the finished product.

Description

technical field [0001] The invention relates to a sealing technology, in particular to a method for sealing between valve plates of a plate multi-way reversing valve. Background technique [0002] The multi-way reversing valve is a combination of reversing valves that can control multiple hydraulic actuators (loads). The multi-functional integrated valve, the valve, the oil supply valve and the brake valve are equal to one. The product composition diagram is shown in figure 1 , each valve block in the figure can also be called a valve plate. The valves of this product can be combined according to the needs to achieve different functions, and are widely used in various construction machinery. Leakage caused by seal failure is one of the common problems in this type of product, inter-chip seal refers to figure 1 The sealing of the joint parts of each valve block in the valve. The processing quality of the sealing groove, such as roughness and flatness of the bottom surface...

AI Technical Summary

Problems solved by technology

The processing quality of the sealing groove, such as roughness and flatness of the bottom surface, is the main cause of leakage between the valve plates. Once the leakage problem caused by the processing quality of the sealing groove is found, no matter whether it is repaired or scrapped, the production cost will increase and the production schedule will be affected.

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