SE511868C2 - Valve unit and use of the same - Google Patents

Abstract

The invention relates to a valve unit (3) for compressed air ventilated protective clothing (1) with connecting breathing mask/breathing valve (10) for the carrier, with feeding of external as well as internal air, when appropriate, at 7.5 bars pressure. The invention proposes a valve spindle housing (25), arranged in a valve housing (13), said valve spindle housing contains a hollow seat abutting spindle (28) that takes different wide openings of the seats S1, S2, S3 depending upon an exterior manually adjustable cam knob (19), which by means of its cam profile (20) adjusts the spindle in defined, distinct positions L0, L2, L30, L150/L100, according to the choice of the carrier of the clothing, at the same time the carrier is ensured breathing air externally or internally in relation to the clothing.

Description

10 IQ c 30 40 511 868 and above all that its can be used on so many be so versatile, that ning to internal such lä that.: ^ 1 ". xaxiing valve and coupling equipment way as possible, and thus from external tt can take place. It is also ES airworthy, the ventilation and breathing air flows can be adapted to the working conditions and the environment the suit wearer is in. House with available quickly significantly increase air air and in other situations be able to transport to the suit for ventilation and ventilation purposes.

Control valve arranged in protective suit for supply a Sometimes in difficult situations the suit wearer must 'd and- \. compressed air for ventilation and breathing purposes is described in a Swedish patent, published as No. 4395 88.

The control valve is here a pressure control valve which essentially comprises a diaphragm of a control arm arranged on n ll, which is spring-loaded with a pressure valve 10, which inserts and places the diaphragm in a suitable position to obtain the overpressure of the suit. The transfer of respiratory air defined air serves more as A wearer of protective suit uft takes place from a non vol vol free space 4 and that exhaled flush air. equipped with a valve unit according to the reminder-owned invention, clean supply air from the air sources is always ensured, since the shut-off valve or the supply air is taken from mixed air through the presence of breathing valve 5. These valve units for the valve are substantially curved and utgöre it is shown that rirum 4, a dehalation valve Bock tions air acc. the invention 7.5 bar t and- and ax it valves are also spring-loaded. is jerk.

An object of the present invention is to create vai-defined, air-flowable conditions known to him to wear, as described above, flows into the protective suit purely adjustable, and at speeds of 1 / min, and after work-adapted valves, thereby providing a property of GIS. ÅUIIS- comfortable and suitably pressurized free space between the suit wearer and the suit. kt) U! L \ 3 511 868 A further purpose is that the inlet air supplied to the valve unit of the suit can, alternatively depending on the circumstances. taken from an external central air supply source and distributed by the valve unit inside the suit to the ventilation air. at the same time as flow takes place via an overflow channel to the air-connected breathing mask / valve until the internal compressed air container, the wearer's respiratory organs are closed, or, where applicable. carried under the protective suit, cooperates with the valve unit and associated connections, in order to supply the wearer primarily with breathing air, as the ventilation function can be restricted or completely canceled for various reasons.

A further object of the present invention is to increase the level of safety in relation to known technology by being able to connect alternative connection arrangements, which can come into operation in the Node Act and especially also be used in test contexts. So e.g. alternative components can be inserted in the valve unit spindles, nozzles, etc.

At a valve unit, sealed attached to a full-length suit. the invention solves the above-related tasks by training the valve arrangement with the features specified in the appended parts of the appended claims.

With reference to the accompanying drawings, a suitable embodiment of the valve unit inserted in its context according to the invention is described below as an example. Fig. 1 shows a schematic sketch of a protective suit wearer with the valve unit sealed and permanently attached to the suit wall, with outer and inner hose connections for external and internal air, Fig. 2 shows in more detail and partly in section an overview of inlet and inner connections connection with an inner valve housing and a cam connection to an outer valve housing, Fig. 3 partly in section a distribution cover, which when screwed to the cover wall of a cover holder, clamps the distribution cover via intermediate sealing ring, and secures the valve unit to sealing abutment against the cover 511 868 10 15 20 25 30 the wall, Fig. 4 a side view of cam knob attached to the outer upper part of the valve housing, Fig. Áa a front view of cam knob with marked values of air stated as l / min to ventilate protective suit, Fig. Ab a cam knob connected to valve housing, partly sectioned and indicating a bore, and inside the cam knob arranged cam curve path, Fig. 4c a view of a horizontal section in Fig. 4b and another its center of rotation concentrically arranged cam curve path and four bores in valve housing, Fig. 5 an extension of the cam curve and the positions of a valve spindle with its end abutting against the cam curve, Fig. 6 an essential part of the valve unit inside the suit, and partly as broken , sectional view, and where a displaceable spindle assumes an initial position, a sealing position, Fig. 7 a next open seat S1 which follows from the displacement of the spindle, and the path a first ventilation volume usually takes its way out into a distribution lid, Fig. 8 the same detail view as in Fig. 7, but spindle displacement for exposing a seat S2 and the passage of air out of the spindle channels and via drilling in valve spindle housing, Fig. 9, detail view as in Fig. 7 and Fig. 8, but with the displaceable spindle end position, and a seat S3 for the passage of the ventilation air via nozzles into the distribution cover, Figures óa, 7a, 8a and 9a are enlarged detail views, which show in more detail the air passages in resp. positions, Fig. 10 the passageway of the supply air through the valve unit in the closed or open position of the ventilation air, so-called by pass function.

Fig. Ll both channels of the distribution cover and T-pieces, F, KI! I.) From 30 bo UI _ 511 868 In the following, an exemplary embodiment will be described of a valve unit according to the invention inserted in its context as shown in Fig. 1.

This means a full protective suit of a modern type with a visor for the wearer's sight and the valve unit 3, sealingly attached to the front of the chest for safe and comfortable operation. An external air source 2a supplies the valve unit, via easily movable hose Å and alternative connection connections, with air flowing through it. This air is divided in the valve unit 3 as ventilation air to the suit through the discharge channels 7 and 7 'for further passage via suit ventilation hoses 11, 11', each of which distributes the ventilation air upwards to the arms and downwards to the legs. From the valve unit 3, via overflow channel. air for breathing purposes, a connected hose 6. (see Fig. 10), which connects to a T-piece 5, from which air. over a pressure sensing valve 33 connected thereto, is further led by means of a hose 8 to a breathing mask finding valve 10, and to this T-piece also a supply hose 9 connects, which via a connected regulator coupling 12 is connected to one of the carrier inside the suit carried compressed air bottle 2b.

The fact that compressed air cylinders are used and can be connected must be seen as an advantage and a versatility that the valve unit offers. Its use is mainly used in cases where external air for various reasons is absent, due to hose breakage of hose 4, tears on suit 1 and the like, when the wearer has to save himself in escape situations out of contaminated space. How this is handled in connection with the invention will be commented on later.

Pig. 2 shows an embodiment of the valve unit 3 according to the invention, wherein a valve housing 13 sealingly attached to the outer cover wall 1 carries a maneuverable calf knob 19, which by means of cover plate 21 protects a locking ring 22, and snaps into the valve housing. The core knob 19 protects the position-determining devices contained inside its housing, as can be seen in more detail in Figs. 4b, 4c and Fig. 5. 511 868 6 10 xJl I.) UI In order to always bring the calf knob 19 with its safe function and not involuntarily out of its selected position during a work operation, four bores 24 are arranged in the valve housing 3 for receiving a spring-loaded positioning ball 23, which in the rotary movement of the steering wheel finds its fixed rest position in a resp. drilling 24. Through this device, the wearer of the suit can advantageously, before taking on the same, set the desired suitable position which determines the air flows into the protective suit.

The valve housing 13 has a portion arranged inside the protective suit, which must be sealed against inflowing media, and therefore has a thin sealing ring 36 arranged around the suit wall opening, clarified according to Figs. 3. The ring 36 lies above the recess in a said opening distributable cover 26 and is thereby located sealingly against the suit wall 1a. In a known manner, good tapping is achieved by arranging a hook-shaped fastener around the distribution cover 26, and designed so that it clamps the suit wall against the valve housing 13, when a cover holder 27 is screwed to the distribution cover 26. The cover holder is by means of O-ring sealingly attached to the distribution cover and thereby provides space for a chamber 17, in the part of the valve unit 3 which projects into the protective suit, ie. the free space 14. Here, the valve unit 3 consists mainly of a valve stem housing 25, which by means of O-rings 38 (Fig. 6) is sealingly stored in the space of the distribution cover 26.

A quick coupling 15 with integrated non-return valve is tightly attached to the outer lower part of the valve unit 3, and an overflow duct 16 in the valve housing 3 communicates with the chamber 17. To this chamber connects a connecting duct 52 for breathing air, which opens into an opening ( see Fig. 10) the devices 45.51 opening towards the distribution cover 26. A trade of a hose connection is sealingly inserted into the lower part of the distribution cover, which makes it possible to connect alternative internal connectors, for example plug 53.

In valve stem housing 25, a displaceable mandrel 28 assumes four different positions depending on the operation of the calf knob 19. The construction of the cam knob is illustrated in more detail in Fig. Ab, óc KA 10 IQ kJ] L.) LJ! 7 511 868 and in Fig. 5. In the circular inner cavity of the chamber a calf curve 20 is formed, with a delimited, different length extension between the curve portions, as shown in Figs. Lt.

24 denotes the four bores placed concentrically around the center of rotation of the knob in the abutment surface of the valve housing 13 against the knob 19. Fig. 5 shows in side view an extension of the path 20a of the calf curve and illustrates the curve levels, which determine the different end positions LO. Lv, L, Ü, Llso / Lloo, which the spindle end 29 can assume by abutment against resp. ka mkurveparti.

The spindle 28 is displaceable in its longitudinal direction in a valve stem housing 25, which has inlet ports 48, connecting the chamber 17 via a vestibule of the valve stem housing 25. In this vestibule a sealed seat S1 is located with associated O-ring 39a, which seals against a nozzle AO (see Fig. TaT.

The nozzle A2 communicates with a longitudinal kauai j spindle 28. A short distance into the opposite of the spindle. solid end 29 is concentrically attached to an O-ring Al. A bit into the spindle end facing the seat S1 is concentrically ins: an O-ring 39b, which forms a seat S2 to lugs in sp. - the interior space of the sub-house.

The spindle 28 has, perpendicular to its longitudinal direction, a drilled, continuous channel 46, which opens into the channel 3; and thereby allows larger river volumes in l / min to pass further into the channel 37. An outlet port 49 penetrates the spindle channel 37 upwards and opens into an overflow channel inserted in the valve spindle housing in the bore 50. This no-bore is provided with a nozzle. The upper opening 42 of the overflow duct 42 in valve stem housing 25 connects to the cavity in the distribution cover 26. From this, distribution channels 44a, 445, oriented 1800 relative to each other, lead the inflowing air out into the free space of the suit for ventilation thereof.

At an end position which the spindle 28 can assume by turning the calf knob to the position L100, alternatively LISÛ according to Fig. É, a turned-down, longitudinal portion of the spindle 38 is exposed, located some distance in from the seat S2, whereupon during the spindle rudder pushing a further passage is opened between said spindle, k. L L / l 511 868 8 body portion and earlier abutting 0-ring 39c concentr.skï arranged f flflfl spindle body. Harvii creates an on ei s; m S3 with lugs in the valve stem housing 25.

In the bore 50, depending on the river volume in my husband considers himself to need ventilation air, an alternative nozzle can be inserted. In the ntrmal case, Ira is deleted; vr xrsn 3, which gives the river volume lßw l min, but can be replaced men l the choke nozzle D2, which is screwed into the opening 43 and gives LUM min of ventilation air into the suit. fi ed reference to Éig. I: shows the vague external luii tes throughput of the valve unit and how a so-called br pass td kt_.n 1 is achieved. In this case, all the said suit ventilation layers, as closed position of the seat S1, can be prevailing.

In order to be able to fully utilize and achieve the technical effect, which is expressed as the creation of a quickly adapted comfort climate for the suit wearer, L »W f Fi is displayed. ll the inserted T-pieces anbrin ade in war- š _ ä their distribution channels 4¿a, wäu true in T-szrqke:,.,. pressure sensing valve; ; j. entered exïerçr, [\ According to Pig. 10 it passes through the hose the air duct Sat oc. chamber 17, at exemplar sis; iu; (f) varvid en ouux 'g; ¿; lv __ -gr ls 51 and 52 inlaid L a lower part 18 of venti. users Sâïle 13 inner part and connects to the supply hose 6 fbr andxingsluft. Of course no wmvand passageway for auqningss 1 ft possible, by to T-piece: 5 e2l; g: F; g. internal air is connected via hose 9 and regulator _ and the air source 2b.

The pressure which constitutes man gtk ar T, í lar rt: sp t s Fresh * utning towards kam kurwans ba a. This pressure ar so that it is easily overcome for the displacement of the spindle in rlk_ ~ IJ t., 'Ng towards the seat S1. In the event that pressure reduction in-'d violation of the song Q. occurs' I v IT 1 / f-, _ hits in the chamber _f. return of the spindle lb to the sieve 51 e¿ as 1.1 prevailing pressure differences in the channel 37, without e: ter¿; ste ~, _. , _. } n: uc (T ring through the return of the bar to the Lp by the camshaft to Lp is required and recommended. .ik 5 511 868 9 The versatility of the valve unit through its technical design is evident in case of emergencies. In this case the non-return valve l5 trades in function and does not allow entry into the valve unit of contaminated air, at the same time as supply air, automatically or manually, is quickly transferred from the compressed air container 2b. This is possible because a pressure reduction sensing valve 33 is connected to the T-piece 5 on the supply line. one on the container Éb ans fi without regulator l2.

The present valve unit has been manufactured and tested under different conditions, and aims to constitute an industrial product to be included in modern protective drafts, and thereby at least meet the requirements for tili! : - reliability set, when it comes to protective work.

In severe pressured situations for the protective suit wearer, simplicity of maneuvering and easy accessibility of the cam knob in the middle of the chest is very important, at the same time as the knob is more protected for abutment and clear for the wearer.

In-depth details have been carefully tested and qualified materials have been selected, such as aluminum and temperature-resistant plastics for durability at both low temperatures and temperatures up to 9OO C.

Claims (4)

511 868 l f 15 LJI 30 10 PATENT CLAIMS Valve unit, for a compressed air-ventilated full protective suit with control device - preferably for air connections for setting different determined air flow volumes to pass as purge air through the suit and the possibility of simultaneous connection of breathing air for the suit wearer, from external as well as internal air source, characteristics - nadd ä rav, tilhus (13), (4, 15, 16, connections (6, 8, that a suit is sealed throughout - including inlet and control devices 48, respectively 12, 33, 19, 28 ...) and 10, 42, h, 7, 11 ..), the end against the suit wall (1a, 1b) with a distribution cover (26) sealed on the suit (1b) sealingly accommodating the outlet inside and that a towards the valve housing is O-ring sealed, (13) adjoining chamber (17) receives air through an opening first overflow channel (16), sliding spindle (15) of drawers (15), in a hose coupling arranged from the outside and that a ventilktsc (13) arranged in , the end facing the chamber (17), in an initiative alskede, abuts a ~ ~ ring-sealed first seat (S1, transmission in position LO), and excludes ventilation air to the suit, and that the opposite end (29) of the spindle (28) constantly abuts a cam curve (20) during its displacement , which depending on the setting of a knob (19) gives specific, distinct ventiiations acc. Pig. 5), and that the location "" o "Lz 'Lßo' Luna / Lion; through bores (24) in the valve housing (13), cooperating with a spring-loaded positioning ball (23), thereby allowing different increasing flow volumes to pass exposed different wide flow passages in a valve spindle housing (25), as spindle n (28) moves from it the first seat (S1), and that parallel to the longitudinal direction of the valve stem housing (25) a dysforsect longitudinal channel (37) is drilled in the valve stem ÜISÜ. and that via a nozzle (Av) a flowing river volume there passing iuït 2 l / min in a first opening position, and that the river volume in the chamber (IT I 1 E: the valve housing (13). f 10 l5 25 30 35 511 868 ll air in a second, next opening position increases to ÉÛ l / min, and that upon further displacement of the spindle (28), an end position is reached, when in the valve spindle housing (25) an O-ring-sealed further passage is exposed and creates a 5 times larger flow volume than the other spindle layer made it possible for the flow volumes 2 l / min and 30 1 min in their respective passages into the channel (37), to pass through a bore (46), perpendicularly and continuously arranged to the longitudinal channel (37), that the perpendicular tube - at the said flow volumes, is connected to a bore (50) in the valve housing (13) connecting to the nozzle-shaped opening (49) arranged in to the longitudinal channel (37), while said larger flow volume at its passage passes an 0- ring-sealed second seat (SQ) and flows into an additional one e channel (42), which is ie seen, and can initially accommodate a dvsa (DI) for 150 in mi; of ventilation air, alternatively an ice-screwed syrup nozzle (Dg) for 100 l / min, the additional channel even L¿; I t ii opening opening into the distribution cover (26), from which Épften, via two circular wide and open distribution channels »~~ a. L: T- (T Ahb), leaves the distribution cover (26) via each piece, with connected ventilation hoses (ll. Ll U, turns the distribution channels (ááa, óób) through its orientation of 1800 between them creates even distribution of set ventilation: / lation flow volumes into the free space of the uniform (141. Valve unit according to Claim 1, characterized in that an air volume of 7.5 bar pressure coming from an external air source (Za) passes the inlet device via a connection hose (4) and a non-return valve with the hose connection (located and further through). the overflow duct (16) into the chamber (17) and out of a chamber opening (51) and a connecting second overflow duct (so as to enable in the suit an internal connection of supply air through the outlet device, which has a hose (6). : T-piece (5) and a supply hose (8) for a breathing unit (l0), in the case of both closed, sealing position of the spindle (Id) now the first seat (S1) as well as in the said selected ventilation.> <UI 10 511 868 12 positions (L2, L30 and at L) or at an alternative) 150 throttle position (L 100 Valve unit according to Claim 1 or 2, characterized in that a non-return valve is integrated in the hose coupling (15) which cooperates with the connecting first overflow channel (16) and the chamber (17), when a pressure drop occurs in the chamber (17). ) at the open first seat (S1). Use of the valve unit and its connecting devices according to one or more of the preceding claims, characterized in that in emergency situations / escape situations for the suit wearer, of the hose break type on external hose (4), the one in the hose coupling (15) integrated non-return valve prevents the ingress of contaminated air through the first overflow duct (16) and the chamber (17), at the same time as a pressure drop occurs in the chamber (17) and thus also in the longitudinal duct (37) of the spindle (28) at open first seat (S1), causing throttling of ventilation air to occur, enables the suit wearer to himself by means of actuation of the cam knob (19) to achieve a final sealing of ventilation air by returning the spindle (28) to the first seat (S1), whereby internal air from a compressed air container (2b) automatically, or manually, as breathing air can be quickly connected via known pressure sensing valve (33) and pressure regulating valve (12) and via the T-piece (5), connected to the outgoing inner hose (6) and associated hose coupling, attached to the valve housing part (18), allows passage of breathing air by means of the supply hose (8) to the suit wearer's breathing mask / breathing valve (10).