EP1010941A2 - Abgas- und Zuluftleitung - Google Patents

Abgas- und Zuluftleitung Download PDF

Info

Publication number
EP1010941A2
EP1010941A2 EP99124800A EP99124800A EP1010941A2 EP 1010941 A2 EP1010941 A2 EP 1010941A2 EP 99124800 A EP99124800 A EP 99124800A EP 99124800 A EP99124800 A EP 99124800A EP 1010941 A2 EP1010941 A2 EP 1010941A2
Authority
EP
European Patent Office
Prior art keywords
duct
pipe
outer pipe
annular
segment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99124800A
Other languages
English (en)
French (fr)
Other versions
EP1010941A3 (de
Inventor
Giuseppe Cornara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CAST Srl
Original Assignee
CAST Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CAST Srl filed Critical CAST Srl
Publication of EP1010941A2 publication Critical patent/EP1010941A2/de
Publication of EP1010941A3 publication Critical patent/EP1010941A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/04—Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with smoke outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J13/00—Fittings for chimneys or flues 
    • F23J13/02—Linings; Jackets; Casings
    • F23J13/025—Linings; Jackets; Casings composed of concentric elements, e.g. double walled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/10—Balanced flues (combining air supply and flue gas exhaust)
    • F23J2211/101—Balanced flues (combining air supply and flue gas exhaust) with coaxial duct arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2213/00—Chimneys or flues
    • F23J2213/20—Joints; Connections
    • F23J2213/202—Joints; Connections between duct or stack sections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2213/00—Chimneys or flues
    • F23J2213/20—Joints; Connections
    • F23J2213/204—Sealing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2213/00—Chimneys or flues
    • F23J2213/30—Specific materials

Definitions

  • the invention relates to a duct for the escape of flue gas and for the intake of combustion gas, particularly for boilers, or the like, which duct comprises two concentric tubular elements, means being provided for connection therebetween at least at the outer end of the duct.
  • Such ducts are widely known and used, particularly in the installation of boilers for independent heating, such as wall hung gas boilers, or the like.
  • Such ducts are installed by forming an aperture in a peripheral wall or in a floor and by inserting and permanently walling therein the outer pipe, further fitting the inner pipe into the outer pipe.
  • the outer pipe has insertion stop members which interact with insertion end-of-stroke abutments.
  • the inner pipe has a wind cap fastened onto its outer end whose size allows it to be applied through the outer pipe.
  • the abutment stops on the outer pipe consist of recesses or throats, whereas the insertion limiting abutments consist of flanges or radial shoulders, typically provided on the wind cap.
  • the invention is based on the problem of providing a duct such as the one described hereinbefore, so that, by simple and less expensive arrangements, the above drawbacks may be obviated, while improving the performance, safety and features of the duct and while simplifying the installation operations.
  • the invention achieves the above objects by providing a duct such as the one described hereinbefore, wherein the outer pipe has means for locking the inner pipe at least axially, which means can be operated or disabled from the inner pipe.
  • these means consist of at least one radial tooth which is elastically deformable and/or elastically movable alternately into positions in which the abutments or joints provided on the inner pipe are engaged or disengaged.
  • the outer pipe has, at its outer end, a plurality of radial inner teeth made of an elastically deformable material, such as rubber or the like, whereas the inner pipe and/or the wind cap have a corresponding number of housings, such as recesses or peripheral apertures, whose shapes are complementary to the radial inner teeth, said teeth being engaged in and disengaged from the housings of the inner pipe and/or of the wind cap by pushing and rotating them and by rotating and pulling them respectively.
  • housings such as recesses or peripheral apertures
  • the radial teeth consist of radial inner projections of an annular finishing rosette engaged on the outer pipe and project inside said outer pipe through corresponding apertures formed in the wall thereof.
  • a second embodiment of the invention provides one or more radial retaining teeth at least in the inner pipe slip off direction, which are applied on oscillating axial tongues.
  • These tongues may be made of the same material as the pipe and, if this material has an insufficient elasticity, they may be provided in combination with elastic means which stabilize the active position of the teeth, wherein they are arranged inside the cavity of the outer pipe.
  • the teeth have, at least on the side turned towards the inner lead in end of the inner pipe, a face which is inclined as a guide surface.
  • a face which is inclined as a guide surface.
  • an inclined face is provided on the opposite face of the tooth or teeth.
  • the teeth advantageously extend at a predetermined distance from an inner stationary shoulder, against which the inner pipe or its wind cap abuts, in the fully fitted position thereof in the outer pipe, whereas an opposite rear abutment surface of the inner pipe and/or of its wind cap cooperates with the steeper inclined faces of the tooth or teeth.
  • the two above arrangements may be also provided in combination with each other.
  • the removable locks of the two pipes which secure them in the correct axial insertion end-of-stroke position may be obviously made in other manners, e.g. as sliding radial teeth, elastically stressed in a stable position inside the outer pipe, etc.
  • the invention also relates to a duct as described hereinbefore which has such characteristics as to facilitate the installation in terms of length thereof.
  • the rectilinear pipe is to be jointed by its inner end by means of curved members to other pipe parts or to intake and/or exhaust outlets of the boiler, depending on its having a tight or an open combustion chamber.
  • the exhaust duct crossing the wall to come outside must be cut, typically to a certain size. This is due to the possible very different thicknesses of the peripheral walls.
  • peripheral walls typically have a thickness ranging from 20 to 50 cm. Hence, the currently available ducts are long enough to be used in any standard condition.
  • the invention allows to avoid the cutting operation, by providing a duct composed of two telescopically sliding segments, whose length is such that they can be adapted, by their assembled length, to the most typical wall thicknesses.
  • a longer second inner element or a third element, also to be telescopically coupled to the second element.
  • the first arrangement might be preferable, because it provides a reduced number of sliding connections.
  • the invention advantageously provides that a first duct segment composed of the outer pipe and of the inner pipe, is embedded in the wall like traditional ducts, or with an arrangement as described hereinbefore, whereas the second duct segment has an inner pipe with a bell joint at its end for connection to the inner pipe of the first duct, said bell having a length corresponding to the telescopic sliding stroke of the two duct segments, and an outer pipe whose diameter is slightly smaller than the diameter of the outer pipe of the first duct segment, at least through an end portion at the end for connection thereto, and which is long enough to ensure the predetermined mutual sliding stroke.
  • the outer pipe of the first duct segment may alternatively have a radial expansion at the connecting end, through a length substantially corresponding to the sliding stroke.
  • the invention in order to ensure that a sealed sliding connection is safely established between the two inner pipes of the two duct segments, when the two connection ends of the outer pipes of said two duct segments are even slightly fitted one into the other, the invention provides that the bell joint of the inner pipe of the second duct segment projects axially to a predetermined extent, out of the connection end of the outer pipe of the second duct segment.
  • the tightness of the bell joint between the two inner pipe segments is ensured by a seal, as required by the standards in force.
  • the tightness between the two outer pipe segments, the inside diameter of the larger one being different from the outside diameter of the smaller one, so as to provide the necessary tolerances to enable mutual sliding, is ensured by at least one annular rib, or by a sequence of said annular ribs, which are provided on the outside perimeter of the outer pipe of the second duct segment, or project out of the inner surface of the pipe segment of the first duct segment.
  • the ribs are made with such a shape and/or from such a material as to reduce friction resistance to mutual sliding between the two segments of the outer pipe.
  • said rib/s taper towards the radial outer peripheral edge, and have a radial extension which is substantially equal to or slightly greater than the sliding tolerance of the two outer pipe segments.
  • the ribs may be made of one piece with the outer pipe segment/s. This arrangement proves to be particularly simple and advantageous in plastic pipes, where the annular ribs may be provided in the form of annular inner and/or outer seams.
  • these ribs may be provided on an annular seal member, which may be accommodated on an annular narrower part on the connection end of the outer pipe of the second duct segment and/or in a radial expansion of the outer pipe of the first duct part, where said two inner pipe segments fit one into the other.
  • the inner pipe is typically made of metal, particularly of aluminum, which provides resistance to the heat of flue gas flowing therein.
  • the telescopic feature of the duct of the invention may be provided in combination with the characteristic as mentioned hereinbefore and either in coaxial exhaust and intake ducts, or in usual exhaust ducts.
  • the invention relates to further improvements, which form the subject of the dependent claims.
  • the illustrated embodiment relates to a coaxial duct having a central passage for the escape of flue gas and an outer peripheral annular duct for the intake of combustion air.
  • the invention principles may apply, at least partially and in the implementation of the main concepts, even to different types of ducts, wherefore the invention is not intended to be restricted to the particular illustrated duct. In fact the latter constitutes the highest technological evolution limit in the field.
  • a duct for the escape of flue gas and for the intake of combustion air comprises an inner pipe 1, delimiting the passage of flue gas and a coaxial outer pipe 2, inwardly delimiting the annular passage of combustion air.
  • the outer pipe 2 is designed to be embedded in the wall, with a predetermined length projecting out of the outer face of said wall, and a predetermined length inwardly projecting out of the inner face of said wall.
  • the outer pipe 2 On its outer end, has radial inner teeth 103 made of an elastic material or radially yielding.
  • said teeth 103 are made of an elastic material such as rubber, or the like, and are held by a ring nut or a peripheral annular seal 3, which is slipped on said end of the outer pipe 2.
  • the radial teeth 103 project inside the outer pipe 2, through corresponding and coincident apertures 102 at the end of the outer pipe 2.
  • the radial yielding teeth 103 have inclined faces on the circumferential end sides, which form a preferably isosceles trapezoid shape when seen in a plan view.
  • the outer pipe is laid as follows: The wall is drilled and the pipe is inserted from the inside towards the outside with the annular seal already applied thereon which, for its yielding capacity, can pass through an opening which is slightly bigger than the pipe but has a diameter which is smaller than the outside diameter of the seal. Then, the pipe is pulled back so that the annular seal abuts against the outer face of the wall thereby covering the gap between the pipe and the opening edge. Then, the outer pipe 2 is secured in position directly from the inside, with suitable materials for filling the gap between the pipe 2 and the opening edge.
  • the position of the slots 102 for holding the radial teeth 103 associated to the annular seal 3 is such that, in the installed position, the outer pipe projects beyond the outer face of the wall through a predetermined length, as compliant with relevant standards.
  • the inner pipe 1 has a wind cap 4 on its end designed to be outside the wall, which has a first part with apertures 104 associated to the mouth of the inner pipe, which part consists in the dome-shaped end of a bell joint 204 for connection of the inner pipe 1.
  • a conical part 304, with apertures for air intake is jointed to the innermost end of the bell joint 204.
  • the conical part widens until reaching a diameter which is slightly smaller than the inside diameter of the outer pipe 2 and greater than that formed by the radial yielding teeth 103 and has a cylindrical end portion 404 which has apertures or slots 504 for fitting the radial yielding teeth 103 therein.
  • Said radial teeth 103 are simply force-fitted in the apertures 504 of the cylindrical end portion 404 of the wind cap 4 by axially outwardly compressing the inner pipe while possibly rotating it.
  • the radial teeth 103 are fitted in the apertures 504 of the wind cap 4, the latter is effectively locked in the outer pipe 2, being prevented from moving in either axial direction.
  • the different elements of the cap 4 and the fitted position of the radial teeth 103 in the cap 4 are dimensioned so that, in the locked condition of the inner pipe 1, any differences in terms of mutual staggering of the projecting parts of the outer and inner pipes comply with safety measures provided by the relevant standards for proper operation of the boiler.
  • the inner pipe may be easily removed and unlocked by following an inverse procedure with respect to that for fitting it in, i.e. a rotation about its axis and a subsequent pulling action.
  • Figs. 7 to 9 show a further embodiment of the invention, wherein the wind cap is locked with respect to axial motion in both directions, between an inner annular abutment 202 or annular inner teeth of the outer pipe 2, which are undeformable, and an elastically removable abutment 106.
  • the two abutments 202 and 106 are axially spaced, and their distance corresponds to the axial distance of a flange or annular radial shoulders 604, 704, or annular segments, provided at the inner end of the wind cap.
  • the rear axial stops, preventing the inner pipe from being slipped off consist of teeth 106, which are supported so as to be able to yield radially outwards under the action of an elastic force, which stably stresses them radially inwards.
  • the radial teeth 6 may be provided on axial tongues which are made of one piece with the outer pipe, by making notches 206 therein. This may be provided by using the yielding properties of the material forming the outer pipe 2. When the material which forms the outer pipe does not ensure this, further elastic members shall be provided, such as springs or the like, which can also be fitted in the notches.
  • the teeth 106 are conformed with a face inclined at least on the side facing towards the inner end of the duct.
  • An inclined face may be also provided on the opposite side of the teeth 106, so as to also allow disengagement of the inner pipe to slip it off the outer pipe.
  • the front and rear faces of the teeth 106 may have different inclinations.
  • the face of the teeth 106, facing the outer part of the wall is steeper.
  • the shape of the tooth 106 may be formed in the thickness of the pipe wall and/or by a suitable deformation of the free end of the tongue 6, obtained by notching. This arrangement may be also applied to metal pipes.
  • the teeth and the elastic support thereof may consist of separate members to be fitted in the apertures of the outer pipe 2.
  • This arrangement may be applied either separately from and alternatively to the previous one, or in combination thereto.
  • the yielding teeth 103 are engaged in apertures 504 of the cap 4, or that said teeth 103 form the front and/or rear axial retaining abutments.
  • the annular seal might hold at least two axially spaced annular crowns of teeth 103, which form the end-of-stroke axial abutments in the inner pipe insertion direction, and the axial stops in its slip off direction, with respect to the outer pipe 2.
  • a further intermediate crown of radial teeth 103 might be provided in combination with apertures for fitting them in, so that the two illustrated embodiments might be easily combined.
  • a variant embodiment provides that the elastically deformable annular seal may be replaced by a seal made of a rigid material, such as plastic or the like.
  • the duct is composed of two telescopically sliding segments A and B, each consisting of an outer pipe 2, 2' and of an inner pipe 1, 1'.
  • the outer pipe 2' of the second segment B which is provided at the end inside the wall of the fist segment A of the duct has a diameter which is slightly smaller than the inside diameter of the outer pipe 2 of the first segment A and has, at its periphery, an annular rib, preferably two, three or more annular outer ribs 302 whose radial extension is of the same order as or slightly greater than the gap between the two outer pipes 2, 2'.
  • this gap is of the order of 0,5 mm, for a diameter difference of the order of 1 mm.
  • the annular ribs 302 may be also possibly provided, alternatively to or in combination with those on the outer pipe 2' of the second duct segment B, on the inner side of the outer pipe 2 of the first duct segment A.
  • the outer pipe 2' of the second duct segment B is fitted into the outer pipe of the first duct A to allow a wider mutual sliding movement of the two duct segments A and B, since the inner side of the wall wherein the outer pipe 2 of the first duct segment A is secured and walled would otherwise be a limitation to said sliding stroke.
  • the ribs 302 may be made of one piece, for instance in the form of seams, when the outer pipes 2, 2' or at least the outer pipe 2' are made of plastic.
  • the ribs may be provided on an annular member which can be fitted onto or into the outer pipe 2' and 2 respectively, an annular recess being provided for accommodating it, which, for the outer pipe 2' of the second duct segment B, is situated on the outer side of the pipe 2', for example corresponding to an annular throat or thinning of the pipe wall 2', whereas, for the outer pipe 2 of the first duct segment A, said annular recess consists of a radial expansion on the inner side of the pipe, obtained either by deforming the pipe, or by reducing the thickness of its wall.
  • the inner pipe 1' of the second duct segment B has a radially widened bell 201 which is designed to be fitted onto the inner pipe 1 of the first duct segment A from the inner end thereof.
  • the bell 201 has at least one annular seal 301. This bell 201 is long enough to ensure the mutual sliding stroke which the two duct segments A and B are designed to run. Further, in order that the highest connection safety between the two pipes 1, 1' may be obtained, the bell 201 extends beyond the connection end side of the outer pipe 2' of the second duct segment B.
  • the projecting portion of the bell 201 has such a length that the proper positioning of the bell 201 on the inner pipe 1 of the first duct segment A may be visually inspected, while the two outer pipes 2, 2' are still at a sufficient distance when the two inner pipes 1, 1' are connected.
  • the length of the two duct segments A and B and the mutual sliding stroke are generally selected so as to ensure that the overall duct length can be adapted to standard wall thicknesses, without requiring cutting operations.
  • a longer second duct segment B may be provided, while maintaining the first segment A unchanged through all the options.
  • a third duct element may be also provided, which may be telescopically connected to the inner side of the second duct segment B, for instance in the same manner as the latter is connected to the first duct segment A.
  • the duct described hereinbefore may be jointed to a curvilinear duct element C, for example for connection to the boiler outlets.
  • the inner curve 1'' is jointed by a bell and a seal to the inner pipe 1, 1' of the rectilinear duct, and to the corresponding exhaust outlet of the boiler, and this curve 1'' is made of metal.
  • the outer curve 2'' may only be jointed by one end by means of a bell or like in the sliding connection of the two telescopic segments of the two duct segments A and B as described above, whereas the other end is jointed by a clamping collar to the corresponding outer pipe 2, 2' of the rectilinear duct or to the corresponding boiler outlet.
  • the invention provides a clamp 10 for the two contacting ends of said parts 2 or 2' and 2'', which has an inner annular spacer, in the form of an annular rib 110, which, in the assembled condition, is interposed between the facing ends of the two pipe parts 2, or 2', and 2'' to be connected.
  • This rib is made of a heat insulating material and may be applied on the inner side of the clamp or made integrally with an annular seal band, whereon the clamp 10 is superposed.
  • standard bell joints may be provided both for the inner curve 1'' and for the outer curve 2''.
  • the bells may be provided either on the boiler outlets or on the curve ends 1'', 2'' facing it. It is also possible to provide that, for one of the two inner or outer curves 1'', 2'', the bell is applied thereon, whereas for the other curve 2'', 1'', the bell is applied on the associated boiler outlet.
  • the two curves 1'', 2'' may be made as described above as regards the sliding connection of the two telescopic duct segments A and B.
  • the outer curve 2'' may possibly have a bell on the faced end of the outer pipe 2' of the second duct segment B, since there are no wall limitations, as for telescopic sliding of the two segments.
  • the second duct segment B is fitted into the first segment through a longer portion.
  • the curve is mounted on the boiler outlets, then the second segment B is slipped off the first segment A, while the facing ends of the curve and of the second duct segment B are connected to each other.
  • the bell of the inner curve 1'' may project beyond the end of the outer curve 2'', as described above for the telescopic duct segments A and B, so that the same possibility to check the safety of the connection to the inner pipe 1' can be obtained.
  • Any provided clamp would be used as means for securing in position and might even be unnecessary, as they might be replaced by simple radial pins, such as clamp screws or the like.
  • the curve part is not limited to the curve, but has, on the side jointed to the duct secured in the wall a rectilinear extension which has a predetermined length and is connected to the pipes of the duct like the duct segment B, as described above.
  • the wind cap 24 is composed of two separate parts, whereof one 124 is integral with the outer duct 22 and the other 224 is integral with the inner duct 21.
  • the wind cap part 124, associated to the outer duct 22 is integral therewith and has the form of an annular band with apertures, provided at the outer end of the outer duct 22.
  • the latter In a predetermined area, at a certain distance from the annular band with apertures, towards the inner end of the outer duct 22, the latter has an annular throat 122 holding an annular conical finishing seal for preventing the outer duct 22 from sliding inwards.
  • This annular seal or annular finishing rosette 3 has, like in the previous example, the function to retain the outer pipe 22 and prevent it from slipping off inwards and is made of a non rigid, elastically flexible material, so that it is deformed when said duct 22 is inserted through the wall from the inside towards the outside.
  • a plurality, i.e. at least one, two, three or more elastic wings 30, oscillating radially with respect to the pipe are provided, and have teeth 130 for engagement in throats or apertures 31 provided in angular positions corresponding to the wings and to their respective teeth.
  • the teeth 130 are preferably conformed as described in the previous embodiment, and profiled in such a way as to show, when seen in an axial view, a trapezoid shape, tapering towards the central axis of the duct, so as to form inclined lead-in surfaces, facilitating connection to and disconnection from the engagement throats or apertures 31, substantially by a relative rotation of the outer duct 22.
  • the inner duct for the escape of flue gas holds at its outer end the second cap part 224, which is fastened to the duct 21.
  • the wind cap part 224 associated to the inner exhaust duct 21 has a plurality of apertures 31 for engagement of the radial teeth associated to the elastic wings 30 of the outer intake duct, which are provided in the same number as the retaining wings and have a shape corresponding to the engagement teeth.
  • the two pipes 121 and 122 which are slidably engaged one into the other, and allow the flue gas exhaust duct 21 to be extended and/or shortened within a predetermined range can be fastened or secured by clamping.
  • a double clamp is provided with an individual clamping member for each pipe 121 and 221.
  • the double clap 33 consists of two annular clamps 133 and 233, which are joined together along the facing ends for a certain angular width in the area which is diametrically opposite to the open area thereof. Each of these clamps fastens the corresponding pipe 121, 221 of the two telescopic pipes which form the exhaust duct 21, while remaining joined in a single element.
  • An advantageous embodiment of these clamps consists of a single open annular clamp, which has a notch 333 on both sides of the open area for a certain angular width towards the diametrically opposite side.
  • the clamp 33 is provided in combination with an annular elastic seal 34, consisting of a band having such an axial length as to be partly superposed to each of the two pipes 121, 122, fitted one into the other, an axial half, or anyway a first axial part of the seal having a smaller inside diameter or a narrowing step 134 with respect to the other part or axial half, which narrowing is such as to compensate the diameter difference between the two pipes 121 and 122, whereas the outside diameter of the two seal parts is equal for both said parts.
  • an annular elastic seal 34 consisting of a band having such an axial length as to be partly superposed to each of the two pipes 121, 122, fitted one into the other, an axial half, or anyway a first axial part of the seal having a smaller inside diameter or a narrowing step 134 with respect to the other part or axial half, which narrowing is such as to compensate the diameter difference between the two pipes 121 and 122, whereas the outside diameter of the two seal parts is equal for both said parts.
  • the two clamps may be clamps having a different inside diameter in accordance with the diameter difference between the two pipes 121 and 221 of the duct 21, which two clamps are always connected to each other for a certain angular width on the side opposite to the open area thereof.
  • a single clamp with an annular narrowing step of a suitable size has a notch on both sides of the open area thereof, as described above.
  • Figs. 19 to 23 show different variant embodiments of the tight clamping means of the two telescopic pipes 121 and 221 which form the exhaust duct 21.
  • the arrangement as shown in fig. 19 provides that the end of the outer pipe 221 has a conical chamfer 321 and at least one, preferably several longitudinal notches 421.
  • the outer pipe 221 In an axially recessed position with respect to the chamfered end, the outer pipe 221 has an external thread.
  • a ring nut 35 with a corresponding internal thread is fitted onto the pipe with the shorter diameter 121 and has, at the end opposite to the outer pipe 221, an inner conical taper 235, which is designed to interact with the outer conical chamfer 321 of the outer pipe 221.
  • the end portion of the outer pipe 221 is clamped against the inner pipe, securing it in position and generating a sufficient sealing action.
  • the outer pipe has an inner conical chamfer 521 which, together with a facing annular conical expansion 335 of the ring nut 35 form a seat for a clamping and sealing ring 36.
  • Said ring may be a closed ring of an elastically deformable material, such as an o-ring, or an open metal ring, as shown in fig. 20.
  • the ring nut 35 is fitted onto the pipe with the shorter diameter 121 and has an external thread whereby it can be screwed on the external thread 421 on the end of the outer pipe 221.
  • the variant as shown in figs. 22 and 23 differs from the embodiment of the previous example in that, in lieu of the o-ring, it has a biconical ring 37 which may be made of an elastically deformable material or of a rigid material and have the shape of an open biconical ring as shown in dashed lines in fig. 23.
  • the conical chamfer on the end side of the outer pipe 221 and the opposite one of the ring nut 35 have a shape and size complementary to the biconical ring, to allow the clamping action.
  • the wind cap as shown in figs 1 to 10 can also be composed of two separate parts and the means for mutual seal and clamp of the telescopic pipes which form the exhaust and/or intake duct, as well as the means for tight clamp therebetween are not restricted to the specific embodiment, wherewith they have been described, but may be obviously used in combination with any embodiment as shown and described herein.
  • the invention is not limited to what has been described and illustrated herein, but may be greatly varied, especially as regards construction, without departure from the guiding principle disclosed above and claimed below.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Gas Separation By Absorption (AREA)
  • Incineration Of Waste (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Joints Allowing Movement (AREA)
EP99124800A 1998-12-17 1999-12-14 Abgas- und Zuluftleitung Withdrawn EP1010941A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITSV980071 1998-12-17
IT1998SV000071A IT1305428B1 (it) 1998-12-17 1998-12-17 Condotto di scarico gas di combustione ed aspirazione gas comburenti

Publications (2)

Publication Number Publication Date
EP1010941A2 true EP1010941A2 (de) 2000-06-21
EP1010941A3 EP1010941A3 (de) 2000-09-20

Family

ID=11408321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99124800A Withdrawn EP1010941A3 (de) 1998-12-17 1999-12-14 Abgas- und Zuluftleitung

Country Status (2)

Country Link
EP (1) EP1010941A3 (de)
IT (1) IT1305428B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1015628C2 (nl) * 2000-07-06 2002-01-11 Muelink & Grol Bv Rookgasafvoerkanaal voorzien van koppelmiddelen voor het koppelen van een mannelijk eind van een eerste pijpdeel en een vrouwelijk eind van een tweede pijpdeel.
EP1201994A2 (de) * 2000-10-26 2002-05-02 Skoberne, Willi Kesselanschlussstück für Abgasanlagen
US7055335B2 (en) * 2003-03-21 2006-06-06 Norcold, Inc. Venting arrangement for a vehicle refrigerator and related method
NL1033492C2 (nl) * 2007-03-05 2008-09-08 Ubbink Bv Dakdoorvoerconstructie, pijpdeel voor een dergelijke dakdoorvoerconstructie en werkwijze voor het plaatsen van een pijpdeel met een kraag op een dakaansluitdeel met een kap.
EP2607786A1 (de) * 2011-12-22 2013-06-26 Dieter Bächle Rohrbogen zur Abgasführung in Heizungsanlagen und Anordnung mit einem Rohrbogen

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2205175A5 (de) * 1972-09-27 1974-05-24 British Gas Corp
US3881752A (en) * 1973-09-24 1975-05-06 George S Fujishima Flange
FR2287013A1 (fr) * 1974-10-04 1976-04-30 Saunier Duval Dispositif d'etancheite des conduits d'amenee d'air frais et d'evacuation des gaz brules pour appareils du genre chaudiere etanche a gaz
GB1463909A (en) * 1975-01-17 1977-02-09 Leblanc Sa E L M Flue terminal
FR2345669A1 (fr) * 1976-03-26 1977-10-21 Leblanc Sa E L M Perfectionnements aux systemes d'evacuation a ventouse des gaz de combustion d'appareils a gaz etanches
GB2027186A (en) * 1978-08-04 1980-02-13 Saunier Duval Balanced flue terminal
GB2152650A (en) * 1984-01-05 1985-08-07 Albert John Amor Flues
EP0303989A2 (de) * 1987-08-18 1989-02-22 Joh. Vaillant GmbH u. Co. Stossverbindung für aus zwei konzentrischen Rohren bestehende Rohrschüsse
US5020512A (en) * 1984-08-09 1991-06-04 State Industries, Inc. Water heater construction and method of heating water
DE19511021A1 (de) * 1995-03-28 1996-10-02 Centrotherm Abgastechnik Gmbh Luft-Abgas-Führung
DE29709874U1 (de) * 1997-06-06 1997-09-04 Erlus Baustoffwerke AG, 84088 Neufahrn Kamin-Rauchrohr aus Muffenrohr-Abschnitten und deren Abdichtung
NL1003484C1 (nl) * 1996-07-02 1998-01-07 Burgerhout Bv Gecombineerde luchttoevoer en rookgasafvoer met snapverbinding.

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2205175A5 (de) * 1972-09-27 1974-05-24 British Gas Corp
US3881752A (en) * 1973-09-24 1975-05-06 George S Fujishima Flange
FR2287013A1 (fr) * 1974-10-04 1976-04-30 Saunier Duval Dispositif d'etancheite des conduits d'amenee d'air frais et d'evacuation des gaz brules pour appareils du genre chaudiere etanche a gaz
GB1463909A (en) * 1975-01-17 1977-02-09 Leblanc Sa E L M Flue terminal
FR2345669A1 (fr) * 1976-03-26 1977-10-21 Leblanc Sa E L M Perfectionnements aux systemes d'evacuation a ventouse des gaz de combustion d'appareils a gaz etanches
GB2027186A (en) * 1978-08-04 1980-02-13 Saunier Duval Balanced flue terminal
GB2152650A (en) * 1984-01-05 1985-08-07 Albert John Amor Flues
US5020512A (en) * 1984-08-09 1991-06-04 State Industries, Inc. Water heater construction and method of heating water
EP0303989A2 (de) * 1987-08-18 1989-02-22 Joh. Vaillant GmbH u. Co. Stossverbindung für aus zwei konzentrischen Rohren bestehende Rohrschüsse
DE19511021A1 (de) * 1995-03-28 1996-10-02 Centrotherm Abgastechnik Gmbh Luft-Abgas-Führung
NL1003484C1 (nl) * 1996-07-02 1998-01-07 Burgerhout Bv Gecombineerde luchttoevoer en rookgasafvoer met snapverbinding.
DE29709874U1 (de) * 1997-06-06 1997-09-04 Erlus Baustoffwerke AG, 84088 Neufahrn Kamin-Rauchrohr aus Muffenrohr-Abschnitten und deren Abdichtung

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1015628C2 (nl) * 2000-07-06 2002-01-11 Muelink & Grol Bv Rookgasafvoerkanaal voorzien van koppelmiddelen voor het koppelen van een mannelijk eind van een eerste pijpdeel en een vrouwelijk eind van een tweede pijpdeel.
EP1201994A2 (de) * 2000-10-26 2002-05-02 Skoberne, Willi Kesselanschlussstück für Abgasanlagen
EP1201994A3 (de) * 2000-10-26 2003-07-09 Skoberne, Willi Kesselanschlussstück für Abgasanlagen
US7055335B2 (en) * 2003-03-21 2006-06-06 Norcold, Inc. Venting arrangement for a vehicle refrigerator and related method
NL1033492C2 (nl) * 2007-03-05 2008-09-08 Ubbink Bv Dakdoorvoerconstructie, pijpdeel voor een dergelijke dakdoorvoerconstructie en werkwijze voor het plaatsen van een pijpdeel met een kraag op een dakaansluitdeel met een kap.
EP2607786A1 (de) * 2011-12-22 2013-06-26 Dieter Bächle Rohrbogen zur Abgasführung in Heizungsanlagen und Anordnung mit einem Rohrbogen
DE102011056854A1 (de) * 2011-12-22 2013-06-27 Dieter Bächle Rohrbogen zur Abgasführung in Heizungsanlagen und Anordnung mit einem Rohrbogen
DE102011056854B4 (de) * 2011-12-22 2014-10-16 Dieter Bächle Rohrbogen zur Abgasführung in Heizungsanlagen und Verwendung einer Anordnung mit einem Rohrbogen

Also Published As

Publication number Publication date
ITSV980071A1 (it) 2000-06-17
EP1010941A3 (de) 2000-09-20
IT1305428B1 (it) 2001-05-04
ITSV980071A0 (it) 1998-12-17

Similar Documents

Publication Publication Date Title
US3394950A (en) Hose coupling attachment
US6773039B2 (en) Plug-in coupling
US7611172B2 (en) Plug-in coupling
AU673928B2 (en) Quick-action coupling for pipes or hoses
EP0702184A1 (de) Halterung
EP3553362B1 (de) One-touch-rohrverbindungsvorrichtung
EP3904746B1 (de) Schnellverbinder
JPH04211791A (ja) 入れ子式チューブを結合する継手とその方法
JP2008309276A (ja) 管継手部の離脱防止構造
EP1010941A2 (de) Abgas- und Zuluftleitung
WO2004104466A1 (en) Tube coupling device
AU756297B2 (en) Plug-in coupling
US7784836B2 (en) Air filter connecting unit
CA1293753C (en) Method in branching off a tube
CN115264210B (zh) 管接头
JP5396024B2 (ja) 差込み式管継手
JPH08338577A (ja) リング付き管の締結用管継手
JP3451229B2 (ja) 管継手
US11796097B2 (en) Coupling part for a hose coupling
JPH10122466A (ja) 管継手の耐震構造
JPH07332556A (ja) 離脱防止管継手
CN110274103A (zh) 一种直通管接头
WO2018041276A1 (en) Tube connection of lining tube sections, especially flexible tubes for flue ways
UA82849C2 (en) Monoblock connection for tubes
JPH1019183A (ja) 分岐管継手

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20010321