SU1699511A1 - Filter - Google Patents

Abstract

The invention relates to filters in which it is difficult to replace and install filter elements. The purpose of the invention is to increase the filter life and the quality of cleaning fluid. For this, the filter is equipped with a pneumatic cylinder 5 mounted on the head 2, made with inlet and outlet holes 15 and 16. At the ends of the rotor 7 installed with the possibility of translational-rotational movement, the pistons 6 are fixed .and 8, the last Compressed Air (L with & CO WITH sd 77

Description

of which is equipped with a check valve 10 and a brush Q. A double check valve 11 serves to bring the filtered particles out of the filter housing 1. With increasing pressure drop on the filter element 4, compressed air is supplied to the upper cavity of the pneumatic cylinder 5, which moves the rod 9 with the pistons 6 and 8 down, the brush 9, making a forward rotational movement, clears the contaminants from the surface of the filter element 4 and forces them through the valve - 5 pan 11. The pressure drop across the filter element is reduced, and compressed air is supplied to the lower cavity of the pneumatic cylinder 5, which moves the rod 7 to the initial position. The non-return valve 0 10 provides free leakage of the piston 8 upwards. 2 Il.

The invention relates to devices for the purification of oils from mechanical impurities, in which it is difficult to replace and install filter elements.

The purpose of the invention is to increase the filter life and the quality of the cleaning fluid.

FIG. 1 shows a filter, a longitudinal section; in fig. 2 is a section A-A in FIG. one.

The filter includes a housing 1, a head 2, an indicator unit 3, a filter element 4, a pneumatic filter 5. The indicator unit 3 includes means for signaling clogging of the filter element. Pneumatic cylinder 5 with a piston 6 is installed on the filter head 2. The auger 7 of the pneumatic cylinder passes through the head 2. The piston 8 and the brush 9 are fixed at the end of the rod. An oblique groove is made on the pneumatic cylinder stem, which interacts with the pin of the head 2 and causes the displacement to perform a forward-rotary movement 9. A check valve 10 is integrated into the piston 8, which ensures the piston to move to the upper position. The check valve 11 is equipped with springs 12 and is made double to ensure the tightness of the filter. At the bottom of the filter element 4 is connected to the glass 13, which is welded to the housing 1. The glass serves to output the filtered particles using a piston 8 through a double check valve 11 outside the filter. The electromagnet 14 is installed in the housing of the indicator unit 3. In the head 2 is made input 15 and output

16 holes.

The filter works as follows. Oil is supplied through port 1 through filter element 4.

five

0

five

0 Q d5 d

55

t is discharged through port 16 into the hydraulic system. As the filter capacity decreases (i.e., the filter element 4 becomes clogged), the pressure differential at the filter inlet and outlet increases, the electromagnet 14 moves and the reed switch operates, which actuates the actuator. The compressed air is supplied to the upper cavity of the pneumatic cylinder 5, the piston 6 moves and, through the rod 7, moves the piston 8 and 9 through the filter element 4. are forced out at the bottom of the filter. When the piston enters the cup 13, the oil pressure increases, the springs 12 open the double check valve 11, and the filtered mechanical particles are withdrawn outside the filter. The throughput of the filter element 4 increases, the pressure drop across it decreases, the reed relay switches off, the actuator operates, and the compressed air enters the lower cavity of the pneumatic cylinder 5. The piston 6 returns to its original position. The movement of the rod 7, the piston 8 and the brush 9 upwards is ensured by opening the check valve 10.

The invention allows to reduce the cost of maintaining the filter in hard-to-reach places of hydraulic devices and to increase the service life of the filter element.

Claims (1)

Invention Formula A filter comprising a housing, a head with openings inlet i and liquid outlet, an indicator unit, a filter element, a pneumatic cylinder mounted on the head, a rod passing through it, and pistons rigidly connected to the rod, mounted in the pneumatic cylinder and inside the filter element, respectively , characterized in that, in order to increase the resource 14 filter and quality of cleaning fluid, the filter is equipped with a reverse filter mounted in the piston of the filter element and a brush rigidly connected to the rod from the filter element side, while the rod is placed in the head with the possibility of translational-rotational motion. Aa 2