RU1829971C - Device for washing hydraulic systems - Google Patents

Abstract

Usage: flushing hydraulic systems. The device comprises a fluid pressure source and a hydraulic accumulator and an actuating valve connected in series behind the pressure source. The crane control mechanism is made in the form of a pneumatic cylinder, the rod cavity of which is connected to the gas cavity of the hydraulic accumulator. The piston cavity is connected to a source of pressure controlled gas. In this case, the cylinder rod is connected directly to the valve of the valve, and the ratio of the valve area to the piston of the cylinder corresponds to the condition of opening the valve when charging the hydraulic accumulator to the washing pressure. 1 s.p. f-ly, 1 ill.

Description

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The invention relates to washing equipment and may find application in flushing hydraulic systems for various purposes.

The purpose of the invention is to simplify the design of the device without compromising its performance.

This embodiment of the device allows to significantly simplify its design while maintaining operational efficiency.

Reducing the number of elements and connections increases the reliability of the device in operation.

The device diagram is shown in the drawing.

A device for flushing hydraulic systems comprises a fluid pressure source, for example, pump 1 and a hydraulic accumulator 2 and an actuating valve 3 connected in series behind it. The valve control mechanism is made in the form of a pneumatic cylinder 4, the piston of which 5 is connected by a rod 6 directly to the valve 7 of the valve.

The rod cavity of the cylinder 4 is connected by a line 8 to the gas cavity of the hydraulic accumulator 2. It is advisable to connect the piston cavity of the cylinder 4 by a line 9 with a reducer 10 to the gas cavity of the hydraulic accumulator 2, which makes it possible to control the gas pressure in the piston cavity of the cylinder 4.

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yu yu xi

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The ratio of the areas of the valve 7 and the piston 5 can be approximately determined from the equation:

Sn Рп + рпр (Зкй - Sn) О, where Sn is the piston area,

5kl - valve working area;

RP pressure in the piston cavity of the cylinder;

„RPR-pressure flushing.

The equation is also suitable for calculating a membrane actuator, which is equivalent to this.

A hydraulic accumulator charging line 11 with a valve 12 is also connected to the gas cavity of the hydraulic accumulator 2. The pump inlet 1 is connected to the tank 13, and a filter 14 is installed at the outlet.

If the input of the pump 1 is connected directly to the flushing system, the tank 13 in the device may be absent. In the device of FIG. 1, the flushing hydraulic system 15 is connected at its ends to the outlet of the actuating valve 3 and tank 13.

The device operates as follows. The washing liquid from the tank 13 is pumped through the filter 14 to the hydraulic accumulator 2 and the valve 3 through the filter 14. When the valve 3 is closed, the liquid enters the hydraulic accumulator 2 and the pressure in it increases, while the gas from the gas cavity of the hydraulic accumulator 2 enters the rod through line 8 the cavity of the pneumatic cylinder 4. When the preset pressure for flushing is reached, the piston 5 moves and opens by means of the rod b the valve 7. The pressure at which the valve 3 opens is determined by the gas pressure in the piston cavity of the pneumatic cylinder 4 (Pn) and the It is controlled by the regulator 10. When the tap 3 is opened, the liquid from the pump 1 and the hydraulic accumulator 2 enters the flushing system 15 and produces a cleaning effect. In this case, the flow rate of the liquid through the flushed system during the joint operation of the pump and

the accumulator is significantly higher than the liquid flow rate at the maximum pump capacity, which contributes to the intensive separation of contaminants. At

when the pressure in the cavity of the valve 3 drops to the RP, the latter closes and then the cycle repeats - accumulation of liquid in the accumulator takes place, the valve opens, etc. until the desired rinse quality is achieved.

This technical solution can significantly simplify the design of the device while maintaining operational efficiency. By reducing the number of elements and connections, the reliability of the device in operation is increased.

The elements used are also simplified - the hydraulic accumulator in this device can be made without a separation

element ..

Claims (1)

SUMMARY OF THE INVENTION 1. A device for flushing hydraulic systems containing a source of fluid pressure and connected sequentially behind the pressure sources, a hydraulic accumulator and an actuating valve with its control mechanism for periodically connecting a liquid pressure source and a hydraulic accumulator to the flushing system, characterized in that the valve control mechanism is made in the form of a pneumatic cylinder, the rod cavity of which is connected to the gas cavity of the hydraulic accumulator, this stock the pneumatic cylinder is connected directly to the valve of the valve pressed against the seat by fluid pressure, and the ratio of the valve areas to the piston of the pneumatic cylinder corresponds to the condition of opening the valve when charging the hydraulic accumulator to the flushing pressure. 2i A device according to claim t, with the proviso that the piston cavity of the pneumatic cylinder is connected to a source adjustable gas pressure.