EP1187681B1 - Compressed air nozzle - Google Patents

Description

The invention relates to a compressed air nozzle according to the features of the preamble of Patent claim 1.

From the prior art are Preßluftdüsen, especially for their use as Blowing guns, well known. The previously used blow-out guns exist z. B. from a system carrier, by means of a hose connection a high pressure hose for supplying a pressure medium to be connected can. Furthermore, a manually or automatically operated outlet valve provided, wherein upon actuation of this valve, the pressure medium via a Outlet nozzle or in a work to be activated working machine emanates. The hitherto marketed systems, in particular as exhaust guns, but safety risks due to improper use. When blowing out of workpieces without the use of safety glasses, it happens that Eye injuries due to blown chips and debris occur. Furthermore, it happens again and again that such blow-guns jokingly against Persons or for the cleaning of work clothes are used and painful wounds on the skin or intestinal blisters are the result. Around To minimize such known accident risks, air-reducing valves are known the normal operating pressure of the compressed air supply from 6 to 10 bar to about 0.5 to 1 bar, especially for hazardous application points, especially for cleaning and Ausblasarbeiten, reduce what a blow-out of workpieces usually sufficient and is mandatory in many countries. Such pressure reducing valves are between blow-gun and high-pressure hose interposed, so that the entire device is quite unwieldy and difficult. Because the pressure measurement on Useful and expensive and is therefore rarely made, is provided according to the invention a measuring possibility.

The object of the invention is a compressed air nozzle of the type mentioned so to further educate them that the required or recommended Safety regulations and operational safety requirements met, and one easier handling at significantly lower production costs guaranteed.

This object is achieved by the characterizing features of patent claim 1 solved.

The invention is based essentially on the fact that the system carrier is designed to receive an integrated, adjustable Luftreduzierventils.
The integrated, adjustable air-reducing valve allows flexible use of the compressed air nozzle and avoids dangers in compressed air systems with high operating pressure.

In a preferred embodiment is in the system sleeve below the Tilting valve insert used with a sealing element, which together with a relative to this sealing element slidable regulating piece and a Regulierhülse the Luftreduzierventil trains. The flow rate of the air reducing valve is preferred by a twisting or shifting of the regulating sleeve within the System sleeve adjustable.

To set a once set air flow rate is preferably one Lock nut for locking the regulating sleeve in the set position intended.

The hose nozzle is preferably insoluble in the upper region of the system sleeve arranged and preferably consists of a durable and durable Elastomer. A preferred use of the Preßluftdüse is their interpretation as Blow-out and cleaning nozzle (gun).

In a preferred embodiment, the system sleeve is of an outer sleeve surrounded, with the lower portion of the hose fitting between the system sleeve and the outer sleeve is received. The hose nozzle as well as the outer sleeve thereby form an elastic workpiece protection, so that damage to sensitive workpiece surfaces are avoided.

The hose nozzle preferably has a lower portion for attachment to the System sleeve on, as well as a middle section with finger rest and Finger guard for actuating the tilting valve and an upper section with a tip, which has a central outlet nozzle for the pressure medium.

In a preferred embodiment, around the central outlet nozzle is an annular nozzle arranged, which serves to produce an air screen. This air screen forms a so-called eye shield and reduces the risk of injury the operator through blown chips and debris.

The molded finger rest is used for convenient dosing of the exhaust valve and prevents slipping of the fingers on greasy hands. An additional Abrutschsicherung is given by a molded annular flange.

In another, preferred embodiment is between the central outlet nozzle and Ring nozzle arranged an annular projection, which extends over the tip of the hose nozzle protrudes and serves as protection against contact. This is a high-pressure build-up direct contact of the tip on the skin or other sensitive surfaces avoided. The compressed air can escape unhindered laterally.

In a further preferred embodiment of the annular projection and annular nozzle for the inclusion of the connection of a standard car tire air pressure gauge educated. This reduces the time required for the operations safety officer for the control to a few seconds for free of charge.

In a preferred embodiment of the invention, for the special protection are claimed, the Regulierstück and the regulating sleeve for connection and designed to hold the hose for the supply of the pressure medium to thereby gaining important advantages in terms of weight, cost and, above all, manageability gain.

In this case, the Preßluftschlauch between the Regulierstück and the Regulierhülse pressed in, and the resulting hose connection can be convenient, saving space and self-sealing screwed into the system sleeve.

The outlet valve is preferably designed as a tilting valve, wherein the hose nozzle encloses the tilt valve.

The subject invention of the present invention does not only result from the Subject of the individual claims, but also from the combination of individual claims among themselves. All in the documents, including the Summary, disclosed details and characteristics, in particular those in the Drawings shown spatial training are essential to the invention as far as they are individually or in combination compared to the state of Technology is new.

In the following the invention with reference to several, only one Embodiment illustrating drawings explained in more detail. Here are the Drawings and their description further features essential to the invention and Advantages of the invention.

Figur 1:

Einen Längsschnitt durch die Preßluftdüse in einer bevorzugten Ausführungsform mit integriertem Luftreduzierventil;

Figur 2:

einen Längsschnitt durch die Systemhülse;

Figur 3:

einen Längsschnitt durch den Einsatz mit Dichtelement;

Figur 4:

eine Draufsicht auf den Einsatz mit Dichtelement;

Figur 5:

einen Längsschnitt durch das Regulierstück des Luftreduzierventils;

Figur 6:

einen Längsschnitt durch die Regulierhülse des Luftreduzierventils;

Figur 7:

einen Längsschnitt durch die Kontermutter des Luftreduzierventils;

Figur 8:

eine Seitenansicht des Ventilstiftes des Kippventils;

Figur 11:

einen Teilschnitt durch die Schlauchtülle;

Figur 11a:

eine Draufsicht auf die Spitze der Schlauchtülle;

Figur 12:

eine Seitenansicht einer bevorzugten Ausbildung der Preßluftdüse mit angesetztem Verlängerungsrohr;

Figur 13:

einen längsseitigen Teilschnitt durch eine weitere Ausführungsform der Preßluftdüse bei geöffnetem Luftreduzierventil;

Figur 14:

einen längsseitigen Teilschnitt durch die Preßluftdüse gemäß Figur 13 bei geschlossenem Luftreduzierventil.

Show it:

FIG. 1:

A longitudinal section through the Preßluftdüse in a preferred embodiment with integrated Luftreduzierventil;

FIG. 2:

a longitudinal section through the system sleeve;

FIG. 3:

a longitudinal section through the insert with sealing element;

FIG. 4:

a plan view of the insert with sealing element;

FIG. 5:

a longitudinal section through the Regulierstück the Luftreduzierventils;

FIG. 6:

a longitudinal section through the regulating sleeve of Luftreduzierventils;

FIG. 7:

a longitudinal section through the lock nut of Luftreduzierventils;

FIG. 8:

a side view of the valve pin of the tilt valve;

FIG. 11:

a partial section through the hose nozzle;

FIG. 11a:

a plan view of the tip of the hose nozzle;

FIG. 12:

a side view of a preferred embodiment of the Preßluftdüse with attached extension tube;

FIG. 13:

a longitudinal partial section through a further embodiment of the Preßluftdüse with open Luftreduzierventil;

FIG. 14:

a longitudinal partial section through the Preßluftdüse according to Figure 13 with the Luftreduzierventil closed.

As shown in Figure 1, the Preßluftdüse, shown here as Blowing gun, a system carrier, consisting of a system sleeve 1, all Absorbs or carries components. According to Figure 2, the system sleeve 1 from a lower section 2, which is provided with an internal thread 3, a central portion 4, which has an external hexagon 5, and a upper section 6 with an outer toothing 7 or Außenrippung, also as External thread conceivable. In the upper section 6 is a passage constriction in shape a bore 8 is provided. Below the bore 8, a chamber is formed, in which the tilt valve 50 (see Figure 8) is used. The valve stem protrudes through the bore 8 downstream over the upper portion 6 of the system sleeve. 1 out. In the closed state of the valve, the valve cover 51 is supported a ring flange forming the bore sealing.

As shown in FIGS. 3 and 4, upstream of the tilt valve 50 (see FIGS 8) an insert 10 is provided, which consists of a sleeve 11, the exact fit in the system sleeve 1 is pressed. In the center of the insert 10 is a Sealing element 12, which via ribs, which form passage openings, with the Sleeve 11 is connected. The sealing element is approximately conical, with the tip of the Taper upstream towards the hose connection points.

Upstream of the sealing insert 10, a regulating piece 20 is provided which has a connecting piece 21 for connecting a high-pressure hose 9, and a flange 22 located at the transition edge between the lower Section 2 and middle section 4 of the system sleeve 1 applies. Downstream of the Flange is a sealing portion 23 with O-ring seal 24, wherein the Outer diameter of the sealing portion 23 is selected so that it is on Inner diameter of the central portion 4 of the system sleeve 1 sealingly applies. The Regulierstück 20 is axially slidably disposed in the system sleeve 1 and interacts with the sealing element 22 of the sealing insert 20, depending on axial position of the Regulierstückes 20 a larger or smaller Passage cross section for the pressure medium remains and thus the Air flow rate and the pressure can be controlled.

The adjustment of the position of the Regulierstückes 20 via a regulating sleeve, which is arranged upstream of the Regulierstückes 20 and an external thread 31st has, which cooperates with the internal thread 3 of the system sleeve 1. Thereby can the regulating sleeve 30 more or less in the system sleeve. 1 screw it, which is connected to the Regulierstück 20, so that the Adjust the axial position of the regulating piece 20 by turning the regulating sleeve 30 leaves. Between regulating sleeve 30 and system sleeve 1 is the in Figure 7 Lock nut shown 40, which has an internal thread 41, which on the External thread 31 of the regulating sleeve 30 can be screwed. One once set position of the regulating sleeve 30 can be secured by the lock nut 40 become.

As already indicated above, the regulating piece 20 has a Connecting piece 21, over which the high-pressure hose 9 are pushed can. The regulating sleeve also has an extension 33 (see FIG Recording the resulting during pressing bulging of the High pressure hose 9 is used. After deferred hose is the Regulating piece 20 pressed into the regulating sleeve 30 by simply screwing it in, being a firm connection between regulating piece, regulating sleeve and High pressure hose 9 is created. This integrated hose connection, consisting of the components 20 and 30, by simply screwing in and out of the System sleeve 1 is removed and used again. At the same time this serves Hose connection as a counterpart to the sealing element 12 of the Luftregulierventils. Worthy of protection here is also that the component 30 is provided with an external thread is, so that the pressing easy, fast and automatable by the Screwing in happens both in the system block and in others, with the same internal thread selected, air tools. These are So a hose connection with integrated air control valve, the Hose is held by simply pressing in the hose connection.

As shown in FIG. 1, an outer sleeve 60 is above the system sleeve 1 arranged, which has a hexagon socket 61, which on the outer hexagon 5 of the system sleeve 1 is pressed, so that the system sleeve 1 through the outer sleeve 60 protected and the hose nozzle unsolvable and sealing with the system sleeve is connected.

On the outer toothing 7 of the upper portion is a hose nozzle 70th pushed, which also overlaps with the outer sleeve 60. The training of Hose nozzle 70 is shown in particular in FIGS. 11 and 11a.

The hose nozzle is made of a durable elastomer and is with her lower portion 71, as described above, connected to the system sleeve 1. Of the lower portion 71 has in a preferred embodiment to a Internal toothing 72 which, for a firm grip on the external toothing 7 of System sleeve 1 provides and is secured by the outer sleeve 60.

The hose nozzle 70 has a passage 79, in which the Valve stem 50 of the tilting valve protrudes, approximately up to the top of the Hose nozzle 70, which carries a finger rest 73. By elastic deformation the hose nozzle by means of pressure on the finger rest 73 of the valve stem 50 of the Tilting valve actuated and released the flow for the pressure medium while the finger guard 88 a sliding or injury by moving, Prevents bleeding parts of the workpiece.

The pressure medium flows through the passageway 79 to the tip 74 of the hose nozzle and flows out via a central outlet nozzle 75. According to the invention, an annular nozzle 76 is arranged around the central outlet nozzle 75, through which part of the pressure medium also flows outwards. The pressure medium flowing out of the outlet nozzle 75 preferably results in an axially extending, sharp jet, whereas the pressure medium flowing out of the annular nozzle 76 flows out at an outlet angle 78 and forms a so-called compressed air screen, which shields the operator against chips and dirt particles that fly back.
According to the invention, the area between the central nozzle 75 and the annular nozzle 76 is formed as an annular projection 77, which serves as contact protection, whereby, when the outlet nozzle 75 is pressed against a surface, the compressed air completely flows out of the annular nozzle 76 and thus leaves no damage on the surface. At the same time, this annular projection allows the pressure measurement of the outflowing compressed air by a commercially available and thus inexpensive Autopneudruckmesser.

Finally, FIG. 12 shows a side view of a preferred embodiment of the invention Preßluftdüse, it can be seen that the exterior of the blow-out through the Outer sleeve 60 and the adjoining hose nozzle 70 is formed. in the For example, an extension tube 80 is shown, which is on the outlet nozzle 75th can be put on. The extension tube has a front outlet nozzle 81 on, which may be formed according to the central outlet nozzle 75. Still, the annular nozzle 76 acts as a compressed air screen, which at an angle 78, as shown schematically here forms. The extension tube 80 is optional and not necessary for the function, except because of the danger that Turning workpieces (with machines in operation) make it necessary.

The extension tube is preferably bendable into any desired shape and can be shortened to any length. The outlet nozzle 81 of the extension tube is gummed on the outside in a preferred embodiment, or with an elastic Attached provided executed, so that a protection of the processed Workpieces from scratches etc. is guaranteed.

Unless otherwise stated, the components are preferably not made corroding light metal, wherein the insert 10 and the tilting valve 50, and the Outer sleeve and the hose nozzle with the exception of the tilt valve preferably made Plastic exist.

In Figures 13 and 14, a variant of the Preßluftdüse is shown with Luftreduzierventil.

The compressed air nozzle comprises, as already described above, a system sleeve 110, the is surrounded by an outer sleeve 160, wherein a hose nozzle 170 between System sleeve 110 and outer sleeve 160 is added.

The integrated hose connection is also by a regulating piece 120 and a regulating sleeve 130 is formed, between which the tube 119 is pressed becomes. This new type of hose connection has already been described above.

In the same manner as in the former embodiment, the Hose connection, consisting of regulating piece 120 and regulating sleeve 130, at the same time designed as Luftreduzierventil, which directly with a tilting valve 150 cooperates.

The tilting valve 150 consists of a valve stem 151 and a valve cover 152. The valve cover 152 is received in the system sleeve 110 and closes the outlet opening. The valve cover 152 and its pressure reducing surface 153 is formed in cross-section approximately frustoconical stepped, and is opposite the Regulierstücks 120, the counter surface 121 according to the shape of the Pressure reducing surface 153 of the valve cover 152 is formed.

FIG. 13 shows the air-reducing valve in the opened state. By in one Threads of the system sleeve 110 received regulating sleeve 130 can be the Regulator 120 against the tilting valve 150 and move away, so that in a movement counter to the flow direction, a valve chamber 122nd forms, in which the compressed air can flow. At the same time comes the Valve plate 152 free of its seat in Regulierstück 120, so that by lateral Pressure on the valve stem 151 of the valve plate 152 from its seat in the System sleeve 10 abhabt and the air through the hose nozzle 170 to the outside can flow out.

If the regulating sleeve 130 together with the regulating piece 120 in Flow direction moves so closes the valve chamber 122, as shown in Figure 14 is shown, and the regulating piece 120 is seated on the valve plate 152. This is the valve is blocked. The tilting valve 150 can not be operated. An open the tilt valve is no longer possible.

Of course, all intervening Regulierstufen and positions of the Regulierstucks conceivable, so that a sensitive control of the air passage is possible.

The adjusted position of the regulating sleeve 130 can be adjusted with a lock nut 140 to back up.

drawing Legend

1

system case

2

Lower section

3

inner thread

4

Middle section

5

External hexagon

6

Upper section

7

external teeth

8th

drilling

9

Preßluftschlauch

10

commitment

11

shell

12

sealing element

20

Regulating piece (hose connection)

21

connecting branch

22

flange

23

sealing portion

24

O-ring

30

Regulating sleeve (hose connection)

31

external thread

32

flange

33

extension

40

locknut

41

inner thread

50

valve stem

51

valve cover

60

outer sleeve

61

Allen

70

hose

71

Lower section

72

internal gearing

73

finger rest

74

top

75

exhaust nozzle

76

ring nozzle

77

annular projection

78

exit angle

79

channel

80

Extension tube (optional)

81

exhaust nozzle

82

finger protection

90

Connection sleeve (hose connection)

91

extension

92

external thread

93

flange

100

Clamping piece (hose connection)

101

connecting branch

102

flange

110

system case

119

Preßluftschlauch

120

regulating piece

121

Druckreduzierfläche

122

valve chamber

130

regulating sleeve

140

locknut

150

tilt valve

151

valve stem

152

valve cover

153

Druckreduzierfläche

160

outer sleeve

170

hose

Claims (14)

1. Compressed air nozzle comprising a system carrier with a hose connection for the supply of a pressure medium and an outlet valve with at least one outlet nozzle, wherein the system carrier (1) has an integrated, adjustable air reduction valve, and the throughput of the air reduction valve can be adjusted by rotating or displacing the regulating sleeve (30) on or inside the system sleeve (1), characterised in that a valve disc (152) of a tilting valve (150) forms a pressure reduction face (153) which, together with a pressure reduction face (121) of a regulating piece (120), forms the air reduction valve.
2. Compressed air nozzle according to claim 1, characterised in that an insert (10) with a sealing element (12), which, together with a regulating piece (20) and a regulating sleeve (30), forms the air reduction valve, is inserted in the system sleeve (1).
3. Compressed air nozzle according to claim 1 or 2, characterised in that the regulating piece (20) and the regulating sleeve (30) are arranged so that they can be displaced and/or rotated relative to the sealing element (12).
4. Compressed air nozzle according to any one of claims 1 to 3, characterised in that the regulating piece (20) and the regulating sleeve (30) are formed to connect and hold the compressed air hose (9) for the supply of the pressure medium.
5. Compressed air nozzle according to any one of claims 1 to 4, characterised in that the hose connection (20, 30; 120, 130) is simultaneously formed as an air reduction valve.
6. Compressed air nozzle according to any one of claims 1 to 5, characterised in that the compressed air hose (9) is pressed in between the regulating piece (20) and the regulating sleeve (30) and in that the regulating piece (20) is inserted in a sealing manner into the system sleeve (1) and is locked there by a connection sleeve (9), which is screwed into the system sleeve (1).
7. Compressed air nozzle according to any one of claims 1 to 6, characterised in that it has a non-detachably connected hose socket (70), a compressed air screen and/or a connection for an air pressure gauge and/or contact protection being integrated in the hose socket (70).
8. Compressed air nozzle according to any one of claims 1 to 7, characterised in that the system sleeve (1) is surrounded by an outer sleeve (60) and the two sleeves (1, 60) receive between them the lower section (71) of the hose socket (70).
9. Compressed air nozzle according to any one of claims 1 to 8, characterised in that the hose socket (70) has a lower section (71) for fastening to the system sleeve, a central section with finger support (73) and/or finger protection for actuation of the outlet valve and an upper section with a tip (74) which has a central outlet nozzle (75) for the pressure medium.
10. Compressed air nozzle according to any one of claims 1 to 9, characterised in that the finger support (73) has a moulded-on annular flange (73a).
11. Compressed air nozzle according to any one of claims 1 to 10, characterised in that an annular nozzle (76) serving to produce an air screen is arranged around the central outlet nozzle (75).
12. Compressed air nozzle according to any one of claims 1 to 11, characterised in that arranged between the central outlet nozzle (75) and annular nozzle (76) is an annular projection (77), which projects beyond the tip (74) and serves as contact protection, and is formed to receive the connection of a commercial motor vehicle air tyre pressure gauge.
13. Compressed air nozzle according to any one of claims 1 to 12, characterised in that a removable extension tube (80) is integrated with a pneumatic protection screen.
14. Compressed air nozzle according to any one of claims 1 to 13, characterised in that the extension tube (80) is provided with a collar on the compressed air side, which, after insertion into the hose socket (70), prevents an undesired release of the extension tube, but on the other hand allows release of the hose socket with a strong action of force.

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