DE10231703C1 - Vacuum cleaner suction tube with length-adjustable fluid line - Google Patents

Abstract

The invention relates to a vacuum cleaner suction tube (1) with an inner tube (3) which can be telescoped in the outer tube (2) and with an adjustable fluid conduit (5) for the passage of water, steam or a solvent. DOLLAR A The invention has for its object to provide a vacuum cleaner suction tube (1) of this kind, which can be dispensed with the known hitherto in the prior art loop formation of the fluid line (5) with an attractive appearance and both on the outside (2b, 3b) and on the inside (2a, 3a) of a conventional vacuum cleaner suction pipe (1) can be arranged. DOLLAR A This object is achieved in that the fluid line (5) consists of two telescoping fluid pipes (6, 7), with one end (6a, 7a) with a nipple (8) each fixed to one of the vacuum cleaner Suction pipes (2 or 3) via a holder (9) are connected and with their other ends (6b, 7b) telescope each other, wherein the free end (6a) of the fluid outer tube (6) has a sleeve (10) with an internal O-ring -Dichtung (11), on which the outer surface (7c) of the fluid inner tube (7) slides sealed during telescoping.

Description

The invention relates to a vacuum cleaner suction tube with an im Outer tube telescopic inner tube and with a length-adjustable fluid line for the passage of water, Steam or a solvent.

A known vacuum cleaner suction pipe of this type according to the DE 195 38 342 A1 is smooth with two flexible lines Exterior surfaces for water and steam provided in one flexible, ribbed thermowell freely movable passed. The protective tube is outside with clamps on the vacuum cleaner suction tube attached. To bridge the telescope length form the protective tube and the lines therein a loop between the End of the outer tube and the facing end of the inner tube. As a result, the fluid-carrying on the support tube grind Cables always on the rough ribbed inner wall of the Protective tube as soon as the vacuum cleaner suction tube is telescoped. Also, the flexible lines when nesting of the Vacuum cleaner suction tube bent inside the protective tube and so that the fluid flow be reduced or interrupted. Apart from the unpleasant appearance of such a vacuum cleaner Suction pipe also exists with inserted telescopic Vacuum cleaner suction pipes of this type the risk of getting stuck the loop of the protective tube on obstructive projections. On Such vacuum cleaner, which can handle both dust and moist fluids in liquid  or absorb vapor form, referred to in the Specialist language as "wet vacuum".

Starting from this closest state of the art, The invention is based on the object, a vacuum cleaner suction tube to create the genus mentioned above, which under Avoiding the aforementioned disadvantages over a pleasant appearance and both on the outside and in the interior arrange a conventional vacuum cleaner suction pipe.

This object is in connection with the above-mentioned Generic term inventively achieved in that the Fluid line of two telescoping fluid pipes exists, with its one ends with a nipple each firmly with one of the vacuum cleaner suction pipes via a holder are connected and those with their other ends together telescoping, wherein the free end of the fluid outer tube is a sleeve with internal O-ring seal, on which the Outer surface of the fluid inner tube sealed during telescoping slides. Through this training, the loop principle of Leave protective tube with the internal fluid lines completely and a telescoping fluid conduit with a straight parallel course created to the vacuum cleaner suction tube, which thereby the optics of the telescopic inner tube in the outer tube of the vacuum cleaner Intake manifold pleasant snuggles. A kink of the fluid-carrying lines is no longer possible, because the outer tube and the inside telescoping inner tube a dimensionally stable corset form. When the vacuum cleaner suction tube is telescoped, telescopes the fluid line automatically. This allows the telescoping fluid pipes on the inside or on the outside arranged the telescoping vacuum cleaner suction tubes  be, with the nipple either on the bracket or at the fixed ends of the fluid telescopic tubes, depending after whether the fluid line on the inside or on the outside of the vacuum cleaner suction pipe is arranged.

In the unpublished DE 101 50 462 A1 is mentioned in column 2 , lines 29 to 38, although that instead of the helical cable disclosed therein, a separate fluid line, for. B. for forwarding steam or for forwarding a liquid cleaning agent in a telescopic sewer pipe, can be added with a corresponding seal assembly. A seal, the holder and the connections of such a telescopic sewer pipe are not disclosed, so that this task-like formulation lacks a concrete solution note.

Although it is from DE 201 14 394 U1 one on an inner tube arranged sealing ring disclosed in a Kreisringnut a disclosed used in his contact with the Inner peripheral surface of a telescopic outer tube is biased and thereafter the non-circular space between the inner tube and Outer tube of the telescopic vacuum cleaner suction tube seals. A such seal is on a telescopic sewer pipe according to the invention because of the associated cross-sectional constrictions and the associated Kavitationen not transferable.

To the fluid similar to the suction air from the narrower inner tube into to be able to transfer more outer tube and thus cheap To create flow conditions is in the invention  Fluid outer tube on the outer tube of the vacuum cleaner suction tube and the Fluid inner tube on the inner tube of the vacuum cleaner suction tube supported.

In a first embodiment, namely in one in Interior of a vacuum cleaner suction pipe arranged fluid line The holder consists of one with an annular Projection an opening of the respective tube from the inside forth sweeping first line piece, in the free end channel the respective fluid telescope tube opens, wherein on the from the Top of the tube protruding projection a second Line piece with corresponding return by means of a Secure the screw with the first line piece underneath is bolted and both line pieces each one 90 ° Angled duct feedthrough for the fluid flowing through respectively. This design protects the fluid line arranged in the interior of the vacuum cleaner suction tube, so that they Robust use over a correspondingly long service life features. From the inner and the outer tube then protrude only the brackets with their connection nipples for the connection of flexible fluid lines for pre-arrival of the respective desired Fluids out. Also with the interior arrangement inevitably Connected pressure loss of the airflow is negligible and makes only with regard to the suction power of the engine insignificantly noticeable.

To alternate through the fluid line alternately Being able to carry out media is advantageous Development of the invention, the second line piece with a Connection nipple and provided with at least two holes,  which the duct of the connecting nipple with the interior connect fluid-conducting the fluid channel of the first line piece.

According to a second embodiment, namely at on the Outside of the arranged telescoping fluid tubes exists the holder of a fitting with nipple, in whose Axialkanal the respective fluid pipe opens sealingly and which on its underside facing the tube with a return is provided, in which one on the inside of the outside or Inner tube arranged attachment counterpart with a engages annular projection, both parts by a from ate passed through the fitting screw together are connected. This embodiment is still for the subsequent installation on conventional vacuum cleaner suction pipes suitable as well as quickly and safely mountable.

Advantageous in both above-described Embodiments of the return in the second line piece or in the molding either via a press fit and / or with an adhesive with the circular projection of the first Conduit or the mounting counterpart as well connected as the ends of the introduced in these brackets Fluid tubes. This will easily be a fluid-tight Achieved connection between the brackets and the fluid pipes.

For the above-described telescopic vacuum cleaner Suction pipes are usually not pulled, but as Bulk used welded steel tubes. This welded Steel pipes are not according to DIN 2393-1 and DIN 2394-1 exactly circular, but within the specified there  Tolerance ranges only approximately circular. Deviating from that, there It continues to have telescopic vacuum cleaner suction pipes with one pear-shaped cross-section, in particular in conjunction with stretchable and therefore spiral wound electrical cables be used. Also on these special vacuum cleaner suction pipes The present invention can be applied.

According to a third embodiment then there is the Holder from the outer shape of the inner tube and the outer tube matched clamps between which of the pipes remote clamping area the respective fluid pipe of the fluid line frictionally guided and clamped. It is advantageous that Fluid outer tube with two clamps on the outer tube of the Vacuum cleaner suction tube clamped, with the free end of this Outer tube near the end of the outer tube through one of two clamps is supported.

Advantageously, the fluid inner tube with the distance of his telescopic length by means of another clamp on the Inner tube held. This creates a stable and always functionally reliable guidance of the fluid tube, which is in this Case of rigid construction of the inner and outer tube of the Vacuum cleaner suction tube operated as a stabilizing corset.

After a particularly advantageous development of Invention, the telescoping fluid tubes either a plastic with good sliding properties, such as PA, PE or PP, or made of stainless steel.

Several embodiments of the invention are in the Drawings shown. Showing:

Fig. 1 shows the cross section through a vacuum cleaner suction tube with an inner space arranged in the fluid line,

Fig. 2 is a sectional view taken along line II-II of Fig. 1,

Fig. 3 shows the enlarged detail III of Fig. 1,

Fig. 4 is a sectional view taken along line IV-IV of Fig. 3,

Fig. 5 shows a second embodiment of a vacuum cleaner suction tube having disposed on the exterior of fluid conduit,

Fig. 6 is a sectional view taken along the line VI-VI of Fig. 5,

Fig. 7 shows the enlarged detail VII of Fig. 5,

Fig. 8 is a sectional view taken along the line VIII-VIII of Fig. 7,

Fig. 9 shows the view of a third embodiment of a vacuum cleaner suction tube having disposed on the outer side retained by means of clips fluid line, partly in section,

Fig. 10 is a sectional view taken along the line XX of Fig. 9,

Fig. 11 is a sectional view taken along the line XI-XI of Fig. 9,

Fig. 12 shows the sectional view of FIG. 10 in an enlarged scale;

Fig. 13 shows the detail enlargement XIII of Fig. 1 by two telescoping, made of metal fluid pipes and

Fig. 14, the detail enlargement XIV of Fig. 9 by two plastic, telescoping fluid pipes together.

In all embodiments, the vacuum cleaner suction tube 1 comprises an outer tube 2 , an inner tube 3 telescoping therein, a sealing sleeve 4 sealing the gap between the outer tube 2 and inner tube 3 and arranged at the front end on the inner side of the outer tube 2 and a fluid conduit 5 which can be adjusted in length Water, steam or a solvent.

The fluid line 5 consists of two telescoping fluid pipes 6 , 7 , which are connected with their one ends 6 a, 7 a with a connecting nipple 8 each fixed to a holder 9 with one of the vacuum cleaner suction pipes 2 or 3 and with their other ends 6 b, 7 b telescope together. In this case, the free end 6 b of the fluid outer tube 6 is surrounded by a sleeve 10 with an inner O-ring seal 11 , on which the outer surface 7 c of the fluid inner tube 7 slides sealed during telescoping.

According to a first embodiment according to FIGS. 1 to 4, the holder 9 consists of a with an annular projection 12 an opening 13 of the respective tube 2 or 3 from the inside 2 a, 3 a forth sweeping first line section 14 , in the free end channel fourteenth a respective fluid telescopic tube 6 or 7 opens with its end 6 a, 7 a, wherein on the protruding from the top 2 b, 3 b of the respective tube 2 or 3 projection 12, a second line piece 15 with a corresponding recess 16 by means of a screw 17 is firmly screwed to the underlying first line piece 14 . Both line pieces 14 , 15 each have a 90 ° angled channel guide 18 , 19 for the flowing fluid.

Furthermore, the second line piece 15 is provided with the connection nipple 8 with at least two holes 20 , 21 , which connect the conduit 22 of the connecting nipple 8 with the interior 23 of the fluid channel 23 of the first line piece 14 fluidly (see Fig. 3).

The connection nipple 8 are connected in accordance with FIGS. 1 and 3 with not shown, flexible supply and discharge lines, which are of no further interest in the context of the invention.

As is apparent from Fig. 1 in conjunction with Fig. 13 from the respective hatching, in the present case, the fluid pipes 6 , 7 made of metal, in particular stainless steel, whereas the arranged on the free end 6 a of the fluid outer tube 6 sleeve 10 with the inner O-ring seal 11 advantageously made of plastic and is attached either by means of a press fit and / or with an adhesive on the outside 6 c of the fluid outer tube 6 and thus supported.

In a second embodiment according to FIGS . 5 to 8, the fluid line 5 is arranged on the outside 2 b, 3 b of the telescoping tubes 2 , 3 . In this case, there is generally indicated at 9 holder in this embodiment of a molded piece 24 with the connecting nipple 8 into the axial passage 24 a (s. Fig. 7) the respective fluid tube 6 or 7 sealingly opens. The fitting 24 is provided at its the tube 2 or 3 facing bottom with a recess 16 , in which a on the inside 2 a, 3 a of the outer or inner tube 2 or 3 arranged mounting counterpart 25 engages with an annular projection 12 . Both parts 24 , 25 are connected to each other by a guided from the outside through the fitting 24 screw 17 and / or by a press fit or an adhesive. Otherwise, with the embodiment of Figs. 1 to 4 of the first embodiment corresponding parts are designated by like reference numerals.

As can be seen in particular from FIG. 5, the fluid has an always straight course through the fluid line 5 and is therefore subject to lower pressure losses than within the fluid line 5 of the first embodiment according to FIGS . 1 to 4. However, the fluid line is then on the outside 2 b, 3 b of the telescopic tubes 2 , 3 and therefore exposed to external forces, whereas the first embodiment shown in FIGS. 1 to 4 against such external forces protected on the inside 2 a, 3 a of the telescopic tubes 2 , 3 are arranged is.

The recess 16 in the second line piece 15 and in the fitting 24 is connected either via a press fit and / or with an adhesive with the circular projection 12 of the first line piece 14 or the attachment counterpart 25 as well as the ends 6 a, 7 a in this Mounts 9 inserted fluid pipes 6 , 7th Also, this second embodiment shown in FIGS . 5 to 8, the two fluid pipes 6 , 7 made of steel, in particular stainless steel, whereas here, according to the embodiment of FIG. 13, the sleeve 10 is made with the inner O-ring seal made of plastic ,

FIGS. 9 to 12 and 14 show a third embodiment of a vacuum cleaner suction tube 1 . In this case, the holder 9 of the outer mold 2 b, 3 b of the outer and inner tube 2 , 3 adapted clamps 26 , between whose remote from the tubes 2 , 3 clamping region 27, the respective fluid pipe 6 or 7 of the fluid line 5 is frictionally guided and clamped ,

It is shown in FIG. 9 clamped, the fluid outer tube 6 with two clamps 26 on the outer tube 2 of the vacuum cleaner suction tube 1, wherein the Feie end 6 b of the fluid outside the tube 6 near the end 2 c of the outer tube 2 supported by one of the two clamps 26 is.

The fluid inner tube 7 is in accordance with Fig. 9 held at a distance of its length by means of a further telescoping clamp 26 on the inner tube 3. This latter clamp 26 differs from the former two clips 26 on the outer tube 2 only in a slightly smaller inner diameter Di, which is understandably adjusted according to the outer diameter of the respective tube 2 or the third

As is apparent in particular from FIG. 12, the clamp 26 is divided in its region 27 along the symmetry axis 28 . In the dividing plane 29 of this symmetry axis 28 , the clamp 26 can be spread apart in the direction of the double arrow 30 with its two ends and so successively first clipped over the outer or inner tube 2 or 3 and thereafter the Fluidaußen- or -innenrohr 6 or 7 in the opening 31st inserted and then the two halves 27 a, 27 b are clamped by a set in the through hole 32 clamping screw. This jamming acts on the one hand with the inner peripheral portion 26 a of the clamp 26 on the outer side 2 b, 3 b of the respective tube 2 or 3 and on the other hand with the inner region 31 a of the opening 31 on the outer side 6 c, 7 c of the respective fluid tube 6 or 7 on.

As already mentioned, the telescoping fluid pipes 6 , 7 are either made of stainless steel or of a plastic with good sliding properties, such as polyamide, polyethylene or polypropylene. In the illustrated case of the third embodiment of FIG. 9, the fluid pipes 6 , 7 are made of plastic. In the present case, the fluid outer tube 6 is made a little thicker wall than the fluid inner tube 7 . In this case, the sleeve 10 is integrally integrated into the outer tube 6 and thus materially connected and provided directly with the inner O-ring seal 11 . As can be seen from the detail enlargement XIV of FIG. 9 in FIG. 14, the sleeve 10 can be produced with the outer tube 2 in one operation.

LIST OF REFERENCE NUMBERS

1

Vacuum cleaner suction tube

2

outer tube

3

inner tube

2

a,

3

a Inner sides of the pipes

2

.

3

2

b

3

b Outside of the pipes

2

.

3

2

c end of the outer tube

2

4

grommet

5

fluid line

6

.

7

fluid tubes

6

a,

7

a,

6

b

7

b ends of the fluid pipes

6

.

7

6

c,

7

c outsides of the fluid pipes

6

.

7

8th

connecting nipple

9

holder

10

shell

11

O-ring seal

12

annular projection

13

opening

14

first line piece

15

second line piece

14

a final channel in the first line section

14

16

return

17

screw

18

.

19

ducting

20

.

21

drilling

22

.

23

ducts

24

fitting

24

a axial channel

25

Mounting counterpart

26

clamps

26

a inner peripheral area the clamp

26

27

clamping range

27

a,

27

b halves of the clamping area

27

28

axis of symmetry

29

parting plane

30

double arrow

31

opening

31

a Interior of the opening

31

32

Through Hole
Di inside diameter of the clamps

26

Claims (12)

1. Vacuum-suction tube with an outer tube telescoping inner tube and with an adjustable fluid conduit for carrying water, steam or a solvent, characterized in that the fluid line ( 5 ) consists of two telescoping fluid pipes ( 6 , 7 ), with their one ends ( 6 a, 7 a) with a connecting nipple ( 8 ) each fixed to one of the vacuum cleaner suction pipes ( 2 or 3 ) via a holder ( 9 ) are connected and with their other ends ( 6 b, 7 b) with each other telescope, wherein the free end ( 6 a) of the fluid outer tube ( 6 ) has a sleeve ( 10 ) with an inner O-ring seal ( 11 ) on which the outer surface ( 7 c) of the fluid inner tube ( 7 ) slides sealed during telescoping. 2. Vacuum cleaner suction tube according to claim 1, characterized in that the telescoping fluid pipes ( 6 , 7 ) on the inner ( 2 a, 3 a) or on the outside ( 2 b, 3 b) of the telescoping vacuum cleaner suction tubes ( 2 , 3 ) are arranged. 3. Vacuum cleaner suction tube according to claim 1 or 2, characterized in that the respective connection nipple ( 8 ) either on the holder ( 9 ) or at the fixed ends ( 6 a, 7 a) of the fluid telescopic tubes ( 6 , 7 ) located. 4. Vacuum cleaner suction tube according to one of claims 1 to 3, characterized in that the fluid outer tube ( 6 ) on the outer tube ( 2 ) of the vacuum cleaner suction tube ( 1 ) and the fluid inner tube ( 7 ) on the inner tube ( 3 ) of the vacuum cleaner suction tube ( 1 ) is held. 5. Vacuum cleaner suction tube according to one of claims 1 to 4, characterized in that the holder ( 9 ) at a in the interior of a vacuum cleaner suction pipe ( 1 ) arranged fluid line ( 5 ) from a with an annular projection ( 12 ) has an opening ( 13 ) of the respective tube ( 2 or 3 ) from the inside ( 2 a or 3 a) forth cross-sectioned first line piece ( 14 ), in whose fluid channel ( 23 ) the respective fluid telescopic tube ( 6 or 7 ) opens, wherein on the from the top ( 2 b or 3 b) of the tube ( 2 or 3 ) protruding projection ( 12 ) a second line piece ( 15 ) with a corresponding recess ( 16 ) by means of a screw ( 17 ) with the underlying first line piece ( 14 ) fixed is screwed and both line pieces ( 14 , 15 ) each have a 90 ° angled duct passageway ( 18 , 19 ) for the fluid flowing through. 6. Vacuum cleaner suction tube according to claim 5, characterized in that the second line piece ( 15 ) with the connecting nipple ( 8 ) and at least two holes ( 20 , 21 ) is provided, which the conduit ( 22 ) of the connecting nipple ( 8 ) that of the fluid channel ( 23 ) of the first line section ( 14 ) fluidly connect. 7. Vacuum cleaner suction tube according to one of claims 1 to 4, characterized in that the holder ( 9 ) of a on the outside ( 2 b, 3 b) arranged telescoping fluid pipe ( 5 ) consists of a fitting ( 24 ) with connection nipple ( 8 ) consists, in whose axial channel ( 24 a), the respective fluid pipe ( 6 , 7 ) opens sealingly and which is provided on its the tube ( 2 , 3 ) facing bottom with a recess ( 16 ), in which a on the inside ( 2 a , 3 a) of the outer or inner tube ( 2 or 3 ) arranged fastening counterpart ( 25 ) engages with an annular projection ( 12 ), wherein both parts ( 24 , 25 ) by an externally through the shaped piece ( 24 ) guided screw ( 17 ) are interconnected. 8. Vacuum cleaner suction tube according to one of claims 5 to 7, characterized in that the recess ( 16 ) in the second line piece ( 15 ) and in the molding ( 24 ) either via a press fit and / or with an adhesive with the circular projection ( 12 ) of the first line piece ( 14 ) or the attachment counterpart ( 25 ) are connected as well as the ends ( 6 a, 7 a) of these holders ( 24 , 25 ) inserted fluid pipes ( 6 , 7 ). 9. Vacuum cleaner suction tube according to one of claims 1 to 4, characterized in that the holder ( 9 ) from the outer shape ( 2 a, 3 a) of the outer tube ( 2 ) and the inner tube ( 3 ) matched clamps ( 26 ), between whose from the tubes ( 2 , 3 ) facing away from the clamping region ( 27 ), the respective fluid pipe ( 6 or 7 ) of the fluid line ( 5 ) is guided and clamped non-positively. 10. Vacuum cleaner suction tube according to claim 9, characterized in that the fluid outer tube ( 6 ) with two clamps ( 26 ) on the outer tube ( 2 ) of the vacuum cleaner suction pipe ( 1 ) is clamped, wherein the free end ( 6 c) of the fluid outer tube ( 6 ) in the vicinity of the end ( 20 ) of the outer tube ( 2 ) by one of the two clamps ( 26 ) is held. 11. Vacuum cleaner suction tube according to claims 9 and 10, characterized in that the fluid inner tube ( 7 ) with the distance of its telescopic length by means of a further clamp ( 26 ) on the inner tube ( 3 ) is supported. 12. Vacuum cleaner suction tube according to one of claims 1 to 11, characterized in that the telescoping fluid pipes ( 6 , 7 ) either made of a plastic with good sliding properties, such as polyamide, polyethylene or polypropylene, or made of stainless steel.