SU671056A1 - Liquid purification filter - Google Patents

Abstract

A by-pass valve operated by pressure difference carries a signal flag visible through an external window, and has a magnetically-coupled switch system to give electrical signal. The valve is used in cartridge filters for hydraulic oil systems, partic. associated with metal-forming installations. Signal indication and transmission is positive and reliable and not affected by valve and shaft friction.

Description

(54) FILTER FOR FLUID CLEANING

one

The invention relates to the field of filtration, and in particular to filters for cleaning liquids, and can be used in hydraulic and lubricating systems of machines, presses, tractors, automobiles and other machines.

A filter for cleaning liquids is known, comprising a housing with a lid, a filter element, an overflow valve and an indicator device, including a permanent magnet mounted on the tail of the overflow valve, a pointer, a cap and a horcon.

However, the known filter cannot be used in pressure lines of high pressure hydraulic systems. In addition, in the gap between the shank of the overflow valve with a magnet and a transparent cap, it constantly finds oil on the film, which impairs visibility and makes it difficult to observe the visual indicator

The purpose of the invention is to eliminate these disadvantages.

The goal is achieved by having grooves in the cap, and the filter is equipped with a partition, made in the form of a cup and installed in a transparent cap, the indicator is offset between the latter and provided with guides placed in the grooves of the cap, between which and O1 the reed switch is located.

It is advisable to make the pointer from a ferromagnetic material.

FIG. 1 of) 5grazen filter, general view; FIG. 2 is a section A-A in FIG. It in FIG. 3 shows a section BB in FIG. 2

0

The filter includes a housing 1, roof-. Ku 2, inside the case is located the filter element 3.

In the lid there is an electrically-non-indicating device 4 with a re-inlet valve 5, preloaded with spring 6 against the stop 7.

The indicator device 4 consists of a permanent magnet 8 mounted on the bypass shank

0 valve 5 and separated by a partition. 9 from the visual indicator 10 of the electric indicator 11. The partition 9 is made tight. The pointer 10 is made, in the form of a plate,

5 curved in an arc, and provided with guides 12 which fit into the grooves 13 of the transparent cap 14.

The partition 9 or the transparent cap 14 is marked with indications of the state of the filter (filter,

0

clean, cleaning needed, bypass valve open).

In the section of the transparent cap 14, not covered by the pointer 10, there is a capsule 15 with a reed switch 16 of the electric pointer 11. A signaling device is connected to the gercal box 16, for example a signal light bulb 17,

The capsule 15 with reed switch 16 presses against the transparent cap with a locking screw 18,

The filter housing has an inlet 19 and an outlet 20 for the passage of fluid. In order to ensure that the bypass fluid in the partition 9 is supplied and discharged, the inlet windows 21 and the outlet windows 22 are filled. The transparent cap 14 is closed by the housing 23 with a notch 24 for observing the indicator.

The filter works as follows. Through the inlet 19, the liquid enters the filter and, after passing through the filter element 3, the filtered liquid is directed to the outlet 20

When the filter element 3 is contaminated, the pressure differential rises and the bypass valve 5, compressing the spring 6, moves upwards.

Together with the bypass valve 5, the magnet 8 located on its shank moves

The movement of the magnet 8 is monitored by a visual pointer 10. Made of ferromagnetic material under the action of magnetic forces, the pointer 10 is pressed against the partition 9 and moves together with the magnet 8 along the grooves 13 of the transparent cap 14, Through the notch 24 in the casing and the transparent cap 14 can be visually rooted by the filter element. When the filter element is not contaminated, pointer 10 points to a mark / characterizing this state. When the filter element is contaminated, the pointer 10 moves up and points to the mark, cleaning is required or the bypass valve is open.

The movement of the magnet 8 is also monitored by an electric pointer 11,

When magnet 8 approaches the reed switch 16 under the action of a magnetic field generated by a permanent magnet, the contacts of the reed switch 16 are closed, giving an electrical signal, for example, a signal lamp 17,

The capsule 15 together with the reed switch 16. can be displaced relative to the magnet 8 by relaxing the locking screw 18 and moving the capsule. This allows you to configure the triggering of the reed switch to any state of the filter element, for example, filtering

element 3 is contaminated, but the bypass valve 5 is closed (for systems where it is not allowed to bypass unfiltered fluid through the valve) or the filter element is contaminated, the inlet valve 5 is open and unfiltered fluid, the filter element 3 goes through the windows 21 and 22 outlet 20,

The use of the invention provides the following advantages.

The presence of a partition of high-strength non-magnetic material between the transparent cap and the permanent magnet bypass valve, increasing the reliability of the filter, expanding the scope of its application. Filters will find wide application in pressure lines of high pressure hydraulic systems.

The current trend in the design of hydraulic circuits is to use high-pressure filter, the pressure in the discharge line, since such filters installed behind the pumps protect all elements of the system and at the same time are small in size and weight.

The location of the visual gauge in the oil-insulated area ensures its reliable readings.

Placing the visual pointer in the grooves of the transparent cap, which can be rotated around the axis through 360 °, ensures its fixation in a position easily accessible for observation.

Tests of experimental samples showed high reliability, you filter in hydraulic systems of both low and high pressures.

Claims (1)

1.Filter for cleaning liquid, comprising a housing with a lid, a filter element, a relief valve and an indicator device including a permanent magnet mounted on the tail valve of the relief valve, a pointer, a transparent cap and a reed switch, differing in the fact that, in order to increase the reliability of the filter and expand its application area, grooves are made in the cap, and the filter is equipped with a partition, filled in the shape of a glass and installed in the cap, A pointer is placed between the latter and provided with guides placed in the grooves of the cap, between which the reed switch is located. 2, Filter pop, 1, is also distinguished by the fact that the pointer is made of ferromagnetic material.