Overflow system

Abstract

The invention relates to the technical field of high-pressure cleaning machine, in particular to an overflow system. The overflow system comprises a valve seat (1), a sealing ring (2) embedded in thevalve seat (1), a valve rod (3) arranged in the valve seat (1), a valve core (4) arranged on the valve rod (3) in a sleeving manner, and a spring (5) for resisting the valve core (4). The outer circumference of the valve core (4) is in interference fit with the sealing ring (2), and the valve core (4) is divided into three parts along a valve rod direction: a first part, a second part and a thirdpart in sequence from top to bottom; an upper overflow slot (6) is formed in the outer circumference of the first part; and a lower overflow slot (7) is formed in the outer circumference of the thirdpart. The overflow system is relatively long in service life and relatively low in noise.

Description

technical field [0001] The invention relates to the technical field of high-pressure cleaning machines, in particular to an overflow system. Background technique [0002] The overflow system is an important part of the pressure washer. Prior art overflow systems such as figure 1 As shown, it mainly includes a valve seat 1', a sealing ring 2' embedded in the valve seat, a valve stem 3' set in the valve seat, a valve core 4' sleeved on the valve stem, and a The spring 5' of the core, because the valve core of the prior art adopts a shuttle-like structure, it is not always in contact with the sealing ring, and in order to overflow, it is necessary to reserve a certain overflow between the valve core and the valve seat. flow gap, which leads to the following disadvantages: [0003] 1. Because the valve core is not always in contact with the sealing ring, when the valve core moves and squeezes the sealing ring under pressure, it is easy to deform the sealing ring too much, whi...

AI Technical Summary

Problems solved by technology

[0003] 1. Because the valve core is not always in contact with the sealing ring, when the valve core moves and squeezes the sealing ring under pressure, it is easy to deform the sealing ring too much, which makes the service life of the sealing ring lower;

[0004] 2. Because the valve core is not always in contact with the sealing ring, it is equivalent to the fact that only the lower part of the valve stem and the valve core is supported by a support point, while the upper part is not supported by a support point. This will easily cause the valve core to move. The core will shake from side to side and collide with the inner wall of the valve seat, which will make the service life of the valve core lower;

[0005] 3. Because there is a certain overflow gap between the valve core and the valve seat, the overflow system is likely to produce a harsh whistling sound when the valve core swings left and right when it is working.

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