SU1000064A1 - Filter - Google Patents

Description

(54) FILTER

one

The invention relates to filtration and can be used for the purification of gases in pneumatic systems.

A filter is known, consisting of a housing with a lid, a cup with movable filtering discs for separating the filler, having sealing rings 1 at the point of contact with the cup.

The lack of a filter is a large hydraulic resistance, a small service life due to the low dust holding capacity and the inadmissibility of high filtration rates due to the small filtering surface.

These deficiencies are partially eliminated in the filter consisting of a housing, support and filter discs pressed against each other through a support with a temperature-compensating spring, an anti-shock valve and a dust trap 2.

The disadvantage of the filter is that at the moment of gas supply through the filter, the gas flow can go, considerably exceeding the allowable one. In addition, as the filter becomes clogged, its resistance will increase in proportion to the clogging of the filter.

The purpose of the invention is to increase the reliability and increase the service life of the filter.

5This goal is achieved by the fact that the well-known filter, comprising a housing, a filtering element made of flat filtering and supporting discs, a shock-proof valve with a central hole

10 and a dust trap, equipped with an impenetrable partition dividing the filter element into pre-and fine-cleaning chambers, while the dust trap is made in the form of a cone with an outlet and is hermetically connected to the transducer, and the shock-proof valve is provided with an outlet pipe installed trap and coaxially with its outlet.

Claims (2)

20 In addition, the area of the gap between the end of the outlet pipe and the dust trap with the shockproof valve closed is equal to the area of the central orifice of the shockproof valve. The drawing shows a filter, a general view. The filter consists of a housing 1 and a fitting 2 connected through a sealing gasket 3 with a cap nut 4. Inside the housing there is a bowl 5 that serves to fix in the radial direction flat annular discs 6 and 7 of filter material, input support discs 8 and 9 and output support discs 10 and 11, the filter element is divided into two parts by an impenetrable partition 12 connected to a dust trap, which is plugged off by a lid 13. The filter discs 7 and the supporting discs 9 and 11 of the fine filter element are pressed together towards each other. permeable partition 12 by a spring 14, which depresses the valve 15 from the seat, located in the inlet fitting and made in the form of a tube with a discharge hole and side windows. The filter works as follows. Compressed gas through the nozzle 2 acts on the valve 15, which under the action of the velocity head and the pressure drop moves, blocking the side windows. For the passage of gas, only the central opening in the valve 15 remains, which provides the required gas flow rate and protects the filter element from pneumatic impact. As the pressure in the casing and in the inlet fitting is equalized, the valve 15 is detached from the seat by the action of the spring 14 and provides a full bore through the side windows in the valve. Then the gas, passing through the chain valve channel, is jetted into the inlet cone of the dust trap. Part of the contamination of the gas through the inlet goes into the dust trap, and the gas through the gap between the grids of the supporting discs 8, the filter disks 6 and the gap between the grids of the supporting disks 10 of the pre-filtering element enters the channels of the glass 5 and passes to the fine filter element cleaned from most of the contaminants. Finally, the gas is cleaned, passing through the gap between the grids of the supporting discs 9, the filtering discs 7 and the gap between the grids of the supporting discs 11 of the fine filter element. The cleaned gas enters the internal channel and is directed to the consumer through the outlet plug of the housing 1. As the filter becomes dirty, the pressure drop across the filter element increases and the support and filter discs of the fine filter element presses closer to each other, and the gap between the support and filter discs of the pre filter filter element increases, which reduces the filter resistance. When the working environment is very dusty, the impermeable disk is installed so that the filter surface of the pre-filter element is larger than the filter surface of the fine filter element. The dust trap is cleaned as it clogs through the hole covered by the lid 13. The use of the invention improves the reliability of operation and the service life of the filter. Claim 1. A filter comprising a housing, a filter element made of flat filtering and supporting discs, an anti-shock valve with a central orifice and a dust trap, characterized in that, in order to increase reliability and increase service life, the filter is equipped with an impermeable partition, separating the filtering element into pre-and fine-cleaning chambers, while the dust trap is made in the form of a cone with an inlet and is tightly connected to the partition, and the shock-proof valve is provided with an output pa Cuttings mounted with clearance to trap dust and coaxially its inlet. 2. The filter according to claim 1, characterized in that the area of the gap between the end of the outlet pipe and the dust trap with the shockproof valve closed is equal to the area of the central orifice of the shockproof valve. Sources of information taken into account in the examination 1. USSR author's certificate number 323134, cl. On 01 D 25/26, 1970. 2. USSR author's certificate for application number 2983520, cl. B 01 D 25/26) 09/17/80.