DE1600710A1 - Valve for pressure medium lines - Google Patents

Description

R, 8863

3
1967 He / K ©

Plant sui?
tn and

ROBERT BOSCH OMBH, Stuttgart ¥, Breitseheidstrasse 4

Valve for pressure fluid lines

The invention is based on a valve for pressure medium lines with a valve ^{element that can move against the force of a valve spring 1} and with a filter element located in the Dnacktmittelurohgang "

Such a valve is known, for example, from British patent specification 773 053. Bort is a non-return valve connected in parallel to a passage provided with a filter, in order to provide a drainage channel for the pressure medium when the filter is clogged to open"

BAD ORiGiNAL

600710

Ffc Bosoh GmbH R _e 88

tJtuttgarb ■ He / Ke

Ai.mh it is already known per se for filters, the filter body to keep it mobile so that, when it is warm, it should be 3 a filter-free passage for the pressure medium safety valve t.!,! like Elin opened such a filter in the cup shape 1st example <= ! ■ / also known from U3A PatonbschrLft 2 699 259.

In contrast, with the subject of the application, the task be solved, 0 LnenbilduroJhgang a Druckmittelventlls - ' keep fiai from impurities and the movable valve » tall and then to support the filters in the valve housing in an 'inf-axis' manner «

Dlose object is achieved according to the invention in that the Filter is axially movable in a known manner, if clogged to release a filter-free passage for the pressure medium safety valve-like that also the filter as Sieve is formed, which is in the Dnicktnitteldurchgang in front of the valve and is under the action of a valve spring, which with her one end is placed on the movable valve member and with its other end on the movable screen.

A particularly advantageous design results in a further one fferkmal of the valve according to the invention in that the movable valve member over the sieve and between the movable The valve member and the valve spring lying on the sieve are pressed against its closed position by a removable housing cover is that also the housing cover a sieve, the valve spring and the valve chamber receiving the movable valve member closes off to the outside, that the valve spring with its one spring end on the faeitfegliehen valve member and with its other spring end on cup-shaped sieve is attached and that finally the sieve on The housing cover is held in place with an axial plel »On this catfish is a Sleb-Venfcil-Einrlohtung created ^ which with decrease of the Ga = häusedeokels cannot be lost and their arrangement cannot be changed this is recorded »This will result in incorrect installation of the Sleb '/ ontil disintegration or the loss of individual parts of the

_Π ο jb «n vofffllivtoi 009885/089 ^

"J -

Robert Bosch GmbH R "8863

Stuttgart He / Ke

An advantageous application of the valve is given according to a further feature of the invention in that the valve in itself known way designed as a seat valve and arranged as at a lower point of a housing and in a dirt collection space horizontal idle valve built into a pressure regulator is. Since such idle valves one of them possibly blocking If the above-mentioned sieve-valve device is used, a pressure regulator idle valve can be used created that largely protected from pollution, simply constructed and light and foolproof accessible 1st,

Embodiments of the invention are shown in the drawing, namely show:

Flg. 1 a valve with a suspended from the housing

Sieve and
Fig. 2 shows a valve in which the valve plate, valve spring

and strainer attached to a cover of the housing

are.

A relief valve 1 of a pressure regulator 2 designed as a seat valve has a valve seat 4 attached to a pressure regulator housing 3 and a movable, plate-like valve member 5 onto which a valve spring 6 is placed at one end. Is “the striving” the valve member 5 against its seat? Press A. The valve seat is bored through, and this bore 7 forms: a passage for a valve tappet 8, the diameter of which is dimensioned so that it leaves an annular gap 9 for the passage of pressure medium opposite the wall of the bore 7.

The other end of the valve spring 6 facing away from the valve member 5 rests against a bowl-like sieve 10 on the sieve bottom 11 thereof. With a sieve rim 12, the sieve 10 is on a wall of a similar

80988 5/0894

Robert Bosch GmbH R. 8863 ° "07 10

Stuttgart He / Ke

axially to the valve seat 4 lying housing bore 13 thereby appended, that a snap ring 14 embedded in the wall of the bore 13 engages under the screen rim 12. That way is the Valve spring 6 so clamped between the movable valve member 5 and the screen 10 that both the valve member 5 and make the sieve 10 under the action of the valve spring 6 a stroke can, above the screen rim 12, the housing bore 13 with a Extension 15 provided, the meaning of which will be explained later.

The valve member 5, the valve spring 6 and the sieve 10 are arranged in a pressure regulator chamber 16, which is outwardly through a attached to the pressure regulator housing 3, neck-shaped cover 17 is closed. The pressure regulator chamber 16 is immediately on connected to a pressure source and allows the pressure medium to be cleaned at a certain pressure level and to a certain extent get to the part of the pressure medium system that the control valves and has consumers.

In the bowl-shaped cover 1? accumulate when used of the pressure regulator Dirt particles and 01 in a compressed air system and other impurities when used in a hydraulic system, which have to be removed from time to tent after the cover has been removed in order to remove them from the system, or which be blown out automatically when the pressure regulator is switched over. The pressure regulator space 16 is not just a dirty room, but also Even when the relief valve 1 is open, it is a passage space for the pressure to be released through the annular gap 9. The danger that the relief valve 1 is clogged by the dirt particles and an overpressure in the system due to the failure of the relief valve 1 arises, is countered by the fact that the valve is connected upstream of the sieve. In this way, dirt particles are removed from the Relief valve held off, and clogging of valve 1 is avoided.

The valve described works as follows; Is the system depressurized or is the pressure below the pressure

909865/0894 bad original

- 5 -

Robart Bosch GmbH R ₀ 8863

Stuttgart He / Ka

Regulator 2 below a certain limit * so the relief valve 1 is closed, and the pressure medium flows through the pressure = regulator rura 16 into the system _o If the pressure has reached the upper limit of the pressure regulator * so the valve moves = tappet 8 down and presses äa ^ movable valve member 5 under tension of the valve spring β htqb its seat 4 * This is a through the. Annular gap 9 leading to the way of the pressure medium and relaxation free, and the bridge system does not rise any further. The sieve 10 ensures that larger lubricant particles, which could interfere with the operation of the discharge valve 1, are kept away from the valve

If the sieve 10 ^ is emptied, it lifts itself with its sieve edge 12 ^ on the Spiengrtag 14 witex ³ Zissammsndrücke the valve spring β abc DeF SiebFand 12 gets into the extension 15 of the BohTOag IJ ₀ intestine is tmtes ³ Uis ^ Eliimg of the sieve 10 a passage of large transverse contact is created for the see relaxing pressure medium * so that the Eatlastissg ^ vntil 1 ari3®it @ fe _o the Schadea tesa fef 1 the aloastea inspection even when the sieve is clogged. If the Öiföck IFFI Sy ^ tera na © li some time ABGA "simkenj, the ram 3 returns upward _a wnd the valve Fader 6 drüekt the bew @ gli0he V © nfcilglied 5 back to its BAMIT then AEAS Batl © sfcim§s ^ © Btil 1

From this it emerges © ^ dai ii @ ^ »tilfed ©! ³ 6 fei v @ rt®ilfesffesi? The toew Gxi @ © © h a ¥ © © ntilgli äes 5 aueh manner both the work ". That of the sieve-filter 10

The Figo 2 EQ. Shows a different Ätisfütemg a 21. Bie the execution n & Gh of the Fig. 1 enfcspreeteidefi strand parts with the same BessugsgatiXan · An Ö «aöteegl © f '22 has a regulator housing 23 w & ü © is © fi öeMuseäeolsel g% _a The EnfclEsfeMjigs ^ entiS. 21 consists of © Sneü Veafcilslt ^ 4 ₅ eia © m movable valve slide 25 » a valve spring S6 wad ®Sii @ te plunger 8. A bowl-shaped sieve 30 1st with ®Mem Sfebbod © ii 31 mt

! §0085 / 0894 * -6-

Robert Bosch GmbH B. 8863

Stuttgart ■ He / Ke

Shank 3 is pushed on a visual hood 32, which is screwed into an eyelet 33 formed on the inside of the cover 24 ^{and allows the sieve 30 to move axially between a screw head 3 1} J- and the plane surface of the eyelet 33. Sin Siebrand '35 is largely tightly inserted into a housing bore 36 provided with an extension 15, which is arranged on the axis of the valve seat 4 »

The moving parts of the relief valve 21 and the screen 30 are located in a pressure regulator 16, which is closed to the outside by the cover 24 _o The moving valve member 25 has a bead 37 and the screen 30 has a constriction 38 with pronounced lobes, on which each one End 39 or 40 of the valve spring 26 is attached. In this way, the movable valve member 25 is pressed by the removable housing cover 24 against its valve seat 4 via the sieve 30 and the valve spring 26 lying in between. The operation of this Entlas tung valve 21 is determined by the "substantially equal to 1, so that they not need to be described again" after the Pig courage whose name was "the lower end position of the screen 30 is not the Siebramäs but the sieve bottom 31 $ of it on the Deokelauge 33 rests ",

The relief valve 21 has the Voi "fe @ il that ti at decrease of Deckais 24 with this from the housing 23 is ^ mbar without its components dissolve or verloraisgQten can * The screen 30, the valve spring 26 and the movable valve member 25 hang tightly together and form a closed® assembly unit.

BATH

8Ö9S8S / Q8S4

Claims (5)

Robert Bosch GmbH R. 8863 Stuttgart. He / Ke claims 1. Valve for pressure lines with one against the force a valve member movable by a valve spring and having a filter located in the pressure medium passage, characterized in that the filter (10, 30) is axially movable in a manner known per se is to, if clogged, release a filter-free passage for the pressure medium like a safety valve, that the filter is also designed as a sieve, which is in the pressure center lpassage in front of the valve (1, 21) and below the Effect of a valve spring (6, 26) is available with one end on the movable valve member (5, 25) and with her the other end is placed on the movable screen (10, 30). 2. Valve according to claim 1, characterized in that the movable Valve member (25} over the sieve (30) and the between the movable valve member (25) and the sieve (30) lying valve spring (26) from a removable housing cover (24) is pressed against its valve seat (4) fixed to the housing » 3 »valve n & ch claim 2, characterized in that the. Valve spring (26) with its one spring end (40) on the movable valve member (25) and with its other spring end (39) on the Sieve (30) is attached and that the sieve (30) is held on the ßehäusedeckel (24) with axial play. S0S885 / O884 ~ 2 - Robert Bosch GMBH . R. 8863 Stuttgart <T He / Ke 4. Valve according to claim 3 * characterized in that the sieve (30) Is cup-shaped in a manner known per se and that a bottom (JI) of the cup-shaped sieve (30) on the ^ shaft of a from the inside in the housing cover (24) inserted screw (32) or the like. Is held. 5. Valve according to one of claims 1 to 4, characterized in that that the valve (1, 21) is designed in a manner known per se as a seat valve. 6 «Valve according to claim 5» characterized by its application as an idle valve located at a lower point of a housing (3, 23) in pressure regulators, in particular for compressed air brake systems. BATH 909885/0894 .7 Blank page