Backwater control system of water cut-off machine

Abstract

A backwater control system of hydraulic cutting machine is composed of water nozzle, sand nozzle, mixing cavity between the said two nozzles and connected to sand delivering pipe, and a high-pressure water generator system having a boosting unit and a high-pressure water accumulator connected to the said water nozzle. It features that a by-pass channel communicated with the said mixing cavity is used for discharging the backwater via a normally opened valve. Its advantages are simple structure and low cost.

Description

technical field [0001] The invention relates to the structure of the water cutting machine, in particular to the water return control system of the water cutting machine. Background technique [0002] The water cutting machine has a water nozzle and a sand nozzle connected in series along the direction of water flow, a sand inlet is opened in the mixing chamber between the water nozzle and the sand nozzle, the sand inlet is connected to a sand delivery pipe, and the water nozzle inlet is connected to a super High-pressure water generation system connection, the system includes a supercharger, the high-pressure water output port of the supercharger is connected to the high-pressure water accumulator through a combined check valve, and the high-pressure water accumulator is connected to the water nozzle through a water delivery pipe, increasing The two oil inlets and outlets of the pressurizer cylinder are respectively connected to the executive output port of the reversing va...

AI Technical Summary

Problems solved by technology

The former method mainly has the following problems: (1). Because the sand nozzle is prone to slight sand blocking when there is no water flow impact or the water flow pressure is too small, and the current high-pressure water switch valve technology is not yet mature, the work The performance and stability are poor. In the ultra-high pressure state, the high-pressure water switch valve is prone to micro leakage. Once there is a small leakage, the backwater phenomenon will occur at any time; (2). In the ultra-high pressure state, the high pressure The spool parts of the water switching valve are easily damaged; (3). The manufacturing cost of the high-pressure water switching valve is relatively high, which greatly increases the manufacturing and maintenance costs of the water cutting machine

For the latter method of using a high-pressure water pump, because the pressure of the water flow generated by the high-pressure water pump at the sand nozzle is relatively small, the phenomenon of slight sand blockage in the sand nozzle often occurs in an instant, and it is also difficult to overcome the problem of backwater, and the adjustable high-pressure water pump The construction cost and maintenance cost are also higher

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