WO1998009105A1

WO1998009105A1 - Leading-in pipe arrangement

Info

Publication number: WO1998009105A1
Application number: PCT/SE1997/001448
Authority: WO
Inventors: Olle WÅNGHED
Original assignee: Waanghed Olle
Priority date: 1996-08-29
Filing date: 1997-08-29
Publication date: 1998-03-05
Also published as: SE9603128D0; SE9603128L; EP0922176A1; SE507032C2; AU4140397A

Abstract

The invention refers to an arrangement for the leading-in of a pipe (17) through a recess (16) in walls (18) or vaults in buildings with the help of a case (1) enclosing the pipe (17). The case (1) is extended along the recess (16), and has at least at a first end a thread (2) and is at least at the mentioned first end furnished with a detachable screwed-on collar (6, 6') for the fixation of the case (1) to the wall (18). The collar (6, 6') has a collar ring (10, 10') with a hole (11, 11') through which the pipe (17) is extended and whose diameter is essentially in accordance with the pipe (17). The case (1) is elastic and less stiff than the collar (6, 6').

Description

aflng-in P»pe arrangement

The invention in question refers to a ieading-in pipe arrangement through a recess in walls, vaults, systems of joists etc. in buildings with the help of a case enclosing the pipe. The case is extended along tlκ recess and is at least at one end furnished with a detachable screwed-on collar for fixing the case to the wall.

Arrangements of this type are used partly as a guide for the pipe through the recess, partly also generally for sealing around the pipe in order to, for instance, avoid or make difficult the penetration oi^' sound, light, gases, particles, dirt, vermin etc. through the recess.

In the Swedish patent 223 299 is shown an example of such an arrangement. This arrangement consists of a case, which , with allowance, encloses the pipe, and which, on the outer side in its filJl length, is furnished with a screw-thread for the screwing on of a collar. The collar has a flange part, which encloses the recess and which preferably has a sealing effect and catches in the wall. The case has on its inner side length battens, whose free end rims limit a cylinder, which is coaxial with the screw thread on the outer side and whose diameter is in accordance with the diameter of the pipe and with the diameter of a hole, coaxial with the screw thread, for the pipe in a collar ring of the collar. The collar is according to this construction made of plastic, and the rim around the hole is sharp-edged in order to bring about an essentially sealing connection, between the pipe and the collar.

The arrangement according to the above mentioned patent letter has the advantage that the case at the range of application on every particular occasion, can be adjusted to a length after a recess in the wall, vault etc. The pipe is, according to this construction, centred partly by the above-mentioned length battens, partly by the above-mentioned holes in the collar ring. If the rim around the hole is sharp-edged , there is, particularly when the collar is made of an elastic plastic, also brought about a sealing effect around the pipe, since the collar can then fit practically tight around the pipe.

This construction, though, has several disadvantages. Since the case according to this known construction is proportionally stiff , its length adjustment must be done with great precision, since the arrangement cannot take any greater tolerances lengthwise. This leads to an increased discard of wrongly adjusted cases, and also to a time-consuming adjustment work.

At the length adjustment of the case according to known technology it is also difficult to adjust the

II length of the case without, by mistake, cutting off the case obliquely. At.this there is formed an oblique end surface on the case, which especially at a small pitch of thread can cut many screw-thread marks. This complicates in its turn the screwing-on of the collar and can necessitate the case end to be cut off again.

The bringing about of a recess through a wall etc. for example with some form of drill , sometimes leads to the recess getting a bent extension. This is particularly the case if for instance drilling has to be done from two sides of a wall etc., since both of the drill-holes seldom become exactly concentric/ Since the above-mentioned case is made of a proportionately stiff mateπal and furthermore on the inside has stiffening length battens, it can , however, in this case be difficult to use, since it is difficult, in a corresponding way, to form the case in order to compensate for the bent extension of the recess. If the case according to the above-mentioned patent is to be used as a leading-in pipe through a recess with a bent extension, a bigger recess has therefore to be made through which the case, and even the pipe, can be straight extended.

In order to solve this problem there is in the German patent DE-39 35 S31 described an arrangement for the leading-in of a pipe through a recess in a wall with the help of an elastic case enclosing the pipe, In this way it is possible to form the pipe to fit the bent form of the recess. The case according to the last- named patent letter is made of a hose with a screw spring spiral and fixed to the wall in question with the help of a plate connected with the wall and with a pipe end threaded on the inside. The pitch of thread of the pipe end corresponds to that of the screw spring spiral. Another problem while using the above- mentioned arrangements is that one must length-adjust the case with particular accuracy, since the cases .while doing this, cannot take certain tolerances lengthwise.

Another problem is that vibrations etc. can have the effect that the collar and the plate connected with the wall with the pipe end threaded on the inside is unintentionally screwed off from the case, which increases the risk of penetration of sounds, lights, gases, vermin etc.

The purpose of the invention in question is therefore to bring about an arrangement for the leading-in of a pipe through a recess in walls or vaults in buildings of the mentioned kind, whose adjustment in the range of application is still more simplified and cheapened, and which makes possible a sealing of the recess at a trifling cost.

These purposes are brought about by the invention in question with an arrangetπent for the leading-in of a pipe through a recess in walls or vaults in buildings with, the help of a, case enclosing the pipe, which case is extended along the recess, and at least at a first end has a screw-thread and which at least at the mentioned first end is furnished with a detachable, screwed-on collar for the fixation of the case to the wall, at which the case is elastic and less stiff than the collar and at which the collar has a screw-thread tαr the screwing-on of the collar on to the screw-thread of the case, characterized by the screw-thread of ihu collar having a pitch which differs from a pitch of the screw-thread of the case, at which the screwing-on of the collar brings about an elastic deformation of the case in the area where the threads unite.

Further advantageous characteristics of the invention are stated in the sub-specifications.

Below are described the forms of execution preferred at present of the invention in question in further particulars referring to attached drawings.

Fig. 1 shows a schematic form of execution of a perpective view of case and collar according to the invention.

Fig. 2 shows the case in a section view.

Fig. 3 is a partly cut schematic sideview of a first form of execution of the invention.

Fig. 4 shows a partly cut schematic sideview of a second form of execution of the invention.

The case shown in figures 1 and 2 has all along its length a thread 2 with a pitch 3. The thread 2 is here shown arranged on the outside of case 1. The case 1 has a casing 4, which is here made of a thin, elastic material, like a plastic material, in which a thread has been shaped by, for instance, arranging a spiral wound thread 5 in the casing which thread is preferably made of a suffer plastic material than the plastic material in the casing 4. The wound thread S works as a spring in the casing 1, which strives essentially for recovering its original shape. The case 1 is elastically deformable in the length direction and is also preferably elastically bendable. The case 1 can for instance be a case which is known in Sweden as a spiral reinforced ventilated hose, and the casing 4 can be made of PVC.

The arrangement according to the invention, also comprises a collar. A form of execution of a collar 6 is shown i fig. 3. This collar 6 has in this shown form an inner thread 7 with a pitch 8. The collar 6 has also a flange part 9 and a collar ring 10. The collar ring 10 has a hole 11, and the rim of the collar ring 10 around the hole i 1 is preferably sharp-edged, which is shown at 12 in fig. 3, for reasons described below.

The collar 6 has preferably at least one groove 14, which is arranged at the flange part 9 (see fig. 1 and 3).

The function of the arrangement shown in fig. 3 will now be described. A recess 16 , through which a pipe will be drawn, is arranged through a wall 18. In the recess 16 a case is arranged . The case 1 is preferably made in standard lengths. The case 1 can, when applied, on every particular occasion be adjusted to a suitable length to fit the recess in the wall, the vault etc. The adjustment of the case 1 is facilitated compared with known technology, since preferably it has a thread 2 with a proportionately big pitch 3, which makes it possible for an adjustment tool, like a knife-blade, to be arranged at a screw bottom between two screw walls close to each other, like two windings close to each Other of the spiral thread 5 of the case 1. The case 1 is then cut off by cutting through the casing 4 between the mentioned screw walls or windings along a turn round the case. The thread 5 or corresponding material, which after this operation connects the two other otherwise separated case parts, is then cut off, at which the adjustment of the case length is done. At this there are no problems caused by obliquely cut threads, which can arise according to known technology.

Two collars 6, 6' are placed onto the pipe 17. The hole in the respective collar ring 10, 10' has preferably a diameter, whih is somewhat smaller than the diameter of the pipe 17, and the collar rings 10, 10^' are in this case elastic, and are for example made of a plastic material. The collar rings can then as while using known technology, according to a preferred form of execution, essentially close tight around the pipe 17. In spite of the fact that at least parts of the collars 6, 6' are then made of an elastic material, the collars 6, 6' shall, according to the invention, at least in the length direction of the case 1, have a greater stiffness than the case 1 for reasons shown below. The mounting of the respective collar 6, 6^' on the pipe 17 is facilitated when the rim of the collar ring round the hole 11, 11 ^' in the respective collar like with known technology is sharp-edged. The collars 6, 6' are screwed on the case 1 at its respective end so far that the flange ends 9, 9^' get into contact with the opposite sides of the wall 18. The contact between the flange parts 9,9' and the wall 18 should preferably be tight in order to minimize the risk of penetration of sounds, lights, gases, particles, dirt, vermin etc. through the recess 16, In order to facilitate this tightening at least one groove 14, 14' can be arranged at one to the wall turned face of both flange parts 6, 6' or of one flange part 6 (not shown). The groove 14, 14^' is extended around the mentioned recess 16, and thus catches in the screwed-on position of the collar 6, 6^' essentially tightening in the wall 18.

In the upper part of fig. 3 there is schematically shown how the threads 7 respective 2 of the collar 6 and the case 1 catch with each other.^' The thread 2 of the case 1 has as been shown a pitch 3, which is greater than the pitch 8 of the thread 7 of the case 6 This leads to the case 1 being elastically compressed in the area, where the threads 2, 7 catch in each other, since the case 1 is less stiff than the collar 6. Since the case 1 wants to elastically recover its original form, there is hereby brought about a prestressing between the screws 2, 7 of the case 1 and the collar 6, which has a locking effect. The collar 6^' has preferably a thread simitiar to that of collar 6, in order to cause a similiar prestressing between the threads of the case 1 and the collar 6'. The prestressing caused in this way also brings about a tightening effect between the threads 2, 7 respective 2, 7^' when applied, since these arc pressed against each other.

It is understood that the collars 6 respective 6^' , considering the effect of the mentioned locking prestressing, can be unscrewed by hand or with tools. This can for instance be of interest when the pipe has to be replaced.

The case 1 is adjusted before the mounting of the arrangement to such a length as to be extended so far along the recess 16 that catches with the threads 7 respective 7' of the collars 6, 6' are made possible and so that the collars 6, 6^' can be screwed on so that their respective flange parts catches in the wall 18. When the collars 6, 6 axe tightened, the case 1 is elastically extended in the area between the catches of the threads of the collars 6, 6^' in case 1. This extension is accentuated when the collars 6, 6' have a smaller pitch than the case 1, since the collars 6, 6' in such cases can catch in more thread turns in the case 1 in an area of application to a given extension, than if for example the case and the collars would have threads with the same pitch. Since the case 1 at the screwing-on of the collars is extended, and since the case 1 strains for recovering its original form there is brought about a prestressing-force in the case 1, which is schematically indicated with arrows 1 in fig. 3, and which works for pressing the flange part 9, 9' of respective collar against the wall 18, which further. improves the possibility to bring about a tight connection in this area.

In fig. 4 is schematically shown how a recess 22, through which a case 23 according to the invention is arranged, has a bent extension. Thanks to the fact that the case 23 is also bendablc, it can be arranged in the recess 22 without the recess 22 having to be made bigger like with known: technology according to SE- 223 229. A through the recess 22 arranged pipe, 24 has in a corresponding way.been' bent in order to be extended through the respective hole of the respective coll ajiof the arrangement.

It can be understood that the cases 1, 23 according to the invention in a known way can be filled with an insulating material in an allowance 25 between the case 1, 23 and the pipe 17 respective 24.

Thanks to the difference in the pitch of thread between the case and the collar is, in the shown forms of execution, brought about an arrangement according to the invention, which in a locking way prestresses the collar at the case, which counteracts the collar unintentionally to be unscrewed from the case, with connected potential risks of penetration of sounds, gases, vermin etc. With this arrangement according to the invention is also brought about the possibility to length-adjust the case with less accuracy than with known technology owing to the above mentioned difference in pitch of thread and owing to the case according to the invention being elastic and that it can adjust to certain differences in length. If the case according to the invention, for instance by mistake, is adjusted to a somewhat too short length it is accordingly possible, within certain limits, to extend it by, in an appropriate way, pulling at it when a collar is to be screwed-on to the case. If the case according to the invention, for instance by mistake, is adjusted to a length, which according to the above mentioned known arrangement were to be a bit too long, it is possible, within certain limits in the pitch of thread between the case and the collar of an arrangement according to the invention, to adjust to certain differences in length of the case through an elastic compression of the case in the thread catch in the collar. As has been described above the case can in an extended position even put tightening contraction forces on the collars so that these are pressed against the wall. Thanks to the fact that the case according to form of execution is bendable it can also accept certain tolerances when the recess does not have a straight but bent extension. The case, according to the invention also has, according to a form of execution, the advantage of being easy to adjust, without many thread turns cutting the section surface of the recess, with connected problems while screwing on the collar. It has also been discovered, that length battens for the centring of the pipe in the case are not always necessary, but that a sufficient centring is caused by the collars, why such length battens, like when using known technology, are not preferably utilized at the arrangement according to the invention. According to the invention the adjustment and fixation of the arrangement in the area of application are thus simplified and cheapened compared with known technology. The invention also offers the possibility of good tightening of the recess at low cost by primarily using the elastic case and preferably utilizing the above mentioned different pitches of thread of the case and the collar.

It is understood that it is possible to act differently from the described forms of execution. Thus the shape of the collars and, whenever applicable, their groove or grooves can be varied as long as they bring about the mentioned tightening possibilities. The thread of the collar does not need a smaller pitch than that of the case, even if this is preferred. At a form of execution without the characteristic of a collar pitch of thread, which is smaller than the case pitch of thread, an elastic compression of the case in the catch between the threads is not made possible . The use of an elastic case at such a form of execution, however, brings about, all the same the possibility to accept certain tolerances along the length of the case and whenever applicable , crossways at the bending of the case for instance.

The tightening of respective collar to a position where they catch in the wall makes it also possible for the case according to this form of execution to extend between the collars in order to bring about the above-mentioned tightening prestressing forces, which work for pressing the respective collar against the wall. All variations and modifications, which are included in the thought behind the invention shall however be comprised in the enclosed patent claims.

Claims

p»tem ai s

1. Arrangement for the leading-in of a pipe (17; 24) through a recess (16; 22) in walls (18) or vaults in buildings with the help of a case (1; 23) enclosing the pipe (17; 24), which case (1; 23) is extended along the recess (16; 22) and is at least at one end furnished with a detachable screwed-on collar (6, 6' for fixing the case (1; 23) to the wall (18), at which the case (1; 23) is elastic and less stiff than the collar

(6, #' ) and at which the collar (6, 6' ) has a thread (7, 7' ) for the screwing-on of the collar ( 6, 6' Von the thread (2) of the case (1;23) , characterized by the thread fj, T ) of the collar (1; 23 ) having a pitch (8), which differs from a pitch (3) in the thread (2) of the case (1; 23), at which the screwing-on of the collar (6, 6^' ) brings about an elastic deformation of the case (1 ; 23) in the area where the threads(2, 7 reap 2, T ) catch in each other,

2. Arrangement according to the claim 1., characterized by the collar (6, 6' ) having a collar ring

(10, 10 ) with a hole (11, 11 ) through which the pipe ( 17) is extended and whose diameter is essentially in accordance with the diameter of the pipe (17).

3 Arrangement according to the claim 1. or 2. , characterized by the pitch of thread (8) of the collar (6, 6' ) is smaller than that of the case (1; 23), at which the screwing-on of the collar (6, 6' ) brings about an elastic compression of the case (1; 23 ) in the area where the threads (2, 7 resp 2, 7' ) catch in each other.

4. Arrangement according to any of the above-mentioned claims, characterized by the case (1; 23) being fixed to the recess (16; 22) by means of a fixation device (6') in an area arranged at a distance from the mentioned first end and by the case ( 1, 23) having such a length that the screwing-on of the collar (6) at the mentioned first end brings about that the case ( 1; 23) is elastically extended between the collar (6) and the fixation device (6' ) for the bringing about of a prestressing force (19) in the case (1; 23) which works for pressing the collar (6) against the wall (18),

5. Arrangement according to the claim 4. . characterized by the fixation device being a second collar (6^' ) which has been mounted at the other end of the case ( 1; 23) at which the case (1; 23 ) is extended along the recess (16; 22) with a collar (6, 6' ) at each end, which coilars (6, 6' ) are arranged on opposite sides of the mentioned wall (18).

6. Arrangement according to any of the above-mentioned claims, characterized by the collar (6, 6^' ) having a flange part (9, 9^' ) , which is in the screwed-on position arranged to catch in the wall (18) to in an area around the mentioned recess (16; 22).

7. Arrangement according to the claim 6. , characterized by the flange part (9, 9' ) having at least one groove (14, 14' ) which is arranged at a surface of the flange part ( 9, 9^' ) facing the wall (18) and is extended around the mentioned recess (16; 22) and which is, in the screwed-on position is arranged essentially tightening to catch in the wall (18).

8. Arrangement according to any of the above-mentioned claims, characterized by the case ( 1; 23) being compressible and extensible lengthwise.

9. Arrangement according to any of the above-mentioned claims, characterized by the case (1, 23) being bendable across its length.

10. Arrangement according to any of the above-mentioned claims, characterized by the thread (2) of the case (1; 23) being arranged on the outside of the case, by the case preferably enclosing the pipe (17, 24) with allowance ( 25) between pipe (17; 24) and case (1; 23), by the rim (11, 11 ) of the collar ring MO, 10^' ) around the hole (12, 12^' ) being preferably sharp-edged, and the collar (6, δ' ) being preferably made of an elastic material like' & plastic, for instance polyethylene plastic.