EP0191728A1 - Appareil pour l'insertion dans un tuyau d'une armature - Google Patents

Appareil pour l'insertion dans un tuyau d'une armature Download PDF

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Publication number
EP0191728A1
EP0191728A1 EP86810044A EP86810044A EP0191728A1 EP 0191728 A1 EP0191728 A1 EP 0191728A1 EP 86810044 A EP86810044 A EP 86810044A EP 86810044 A EP86810044 A EP 86810044A EP 0191728 A1 EP0191728 A1 EP 0191728A1
Authority
EP
European Patent Office
Prior art keywords
hose
mandrel
segments
threaded rod
nut
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Withdrawn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
EP86810044A
Other languages
German (de)
English (en)
Inventor
Harry Schneider
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.)
Bernardini Attilio
Original Assignee
Bernardini Attilio
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 Bernardini Attilio filed Critical Bernardini Attilio
Publication of EP0191728A1 publication Critical patent/EP0191728A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses

Definitions

  • the invention relates to a device for pressing a hose fitting into a hose on one or both sides.
  • Hoses used in the industrial sector are generally thick-walled and preferably reinforced with a fibrous material with high tensile strength or high space pressure, such as textile, glass or carbon fibers. For this reason, it is often extremely difficult to attach the hose fittings.
  • Hose core and the fitting desired i.e. the inside diameter of the hose and the fitting are the same. This corresponds to the high hygienic demands of these industries.
  • the immense widening of the hose in the fitting area creates holding forces which, depending on the pressure and the ratio of the nominal widths, make no or only a normal cover with two or three hose bands necessary.
  • the hose fitting is pressed in by inserting a hose coupling set into the hose, a mandrel being arranged at a distance from the hose end. Then the hose is clamped in a vice at the level of the mandrel, whereby precautionary measures must be taken so that the hose is not injured.
  • the hose fitting is pulled into the hose by a threaded rod rotating in the mandrel.
  • the inventor has set himself the task of creating a device for pressing a hose fitting into a hose on one or both sides, which can certainly avoid injuries to the hose core, is easy to handle and requires little investment and labor.
  • drawing set It is essential for the design of the drawing set that it can be anchored in the hose without causing the slightest injury to the hose core.
  • Known drawing sets which meet these requirements are suitable for the device according to the invention, for example the above-mentioned mandrel inserted into the hose.
  • the drawing set preferably has a threaded rod with drive means which can be actuated clockwise and counterclockwise, in particular a crank which is rigidly connected to a locked nut and which is equipped with one or two lever arms and associated handles.
  • the threaded rod can expediently also be driven by an electric motor with a corresponding gear, hydraulic or pneumatic means, and possibly also have control devices.
  • the clamping element of the drawing set can consist of a holding mandrel with a cylindrical outer surface, which rests on the inner surface of the hose, but can still be inserted easily and with little force.
  • the holding mandrel is screwed onto the end of the threaded rod protruding into the hose and locked with a nut.
  • the same threaded rod can be used for holding mandrels of different sizes, which is not necessary, but is inexpensive.
  • the cylindrical outer surface of the holding mandrel preferably has fine knobs, a screw thread, a transverse grooving, a border or the like, which increase the sliding resistance in the longitudinal direction of the hose.
  • the pressure force is expediently applied via two plastic shells with roughly square outer contours in the installed position. The two shells are each guided through bolts that pass through two bores, which may be designed as screws.
  • the hose end can then be in a vise or by known means, e.g. Screw clamps are attached to a suitable base.
  • the clamping member consists of a hollow cylinder which is guided on the threaded rod but is freely movable and which consists of at least two segments which are expandable and held together by elastic means, the bore of this expanding mandrel resting on the threaded rod being rounded off at the end faces or . opens conically.
  • a central cone nut with the tip in the direction of the expanding mandrel freely rotatable on the threaded rod, a second conical nut with the tip in the direction of the expanding mandrel fixed on the other side of the threaded rod by means of a counternut and the tip in the direction of the expanding mandrel form the centerpiece, the first Cone nut with frictional engagement with the bore of the expanding mandrel has the greater frictional resistance than the second cone nut.
  • the hollow cylinder which acts as an expanding mandrel and is in positive engagement with the threaded rod, preferably divided into at least three identical segments is expediently held together by conventional rubber 0-rings arranged on the outer radius. In practice, it has proven useful to insert two 0-rings in the area of the end faces of the expanding mandrel in annular grooves.
  • the expanding mandrel can only develop its effect if - after inserting the expanding mandrel into the hose - when turning the threaded rod, the first cone nut does not turn due to the greater frictional resistance with the bore of the expanding mandrel, while the countered second conical nut glides on the bore of the expanding mandrel .
  • the back pressure of the hose causes the expanding mandrel to expand regularly over its entire length, i.e. the two cone nuts are pulled into the hole to the same extent.
  • the outside diameter of the relaxed holding or expanding mandrel inserted into the hose is dimensioned such that it touches the inner surface of the hose, but without any significant resistance.
  • the clear width of the hoses is preferably adapted to DIN standard 11 854 for hose screw connections. An assortment of expanding mandrels can therefore be created which corresponds to these DIN standards.
  • the insertion segments essential for the successful use of the device according to the invention ensure that the hose fitting can be pressed into the hose in all variants of drawing sets without damaging the hose core.
  • the diameter of the end face of the insertion segments pointing in the direction of the hose is preferably slightly smaller than the inside diameter of the hose.
  • the hose end hits the cone surface when the hose fitting equipped with the insertion segments is inserted, expands continuously when pressed in and can slide over the hose fitting up to a stop without risk of injury to the hose core.
  • the end faces of the insertion segments pointing in the direction of the support plate can have a bore which is arranged in the middle of the end face. In this hole After removing the pull set, an appropriate auxiliary rod can be inserted and an insertion segment can be knocked out.
  • two correspondingly dimensioned plastic shells can be screwed onto the area after the expansion mandrel inserted into the hose has been expanded.
  • the hose can be anchored in a vice or screwed onto another suitable base or attached in some other way.
  • the thick-walled hoses usually provided with reinforcing inserts, e.g. With nominal widths of 40, 50, 65 and 80 mm, sufficiently rigid to press in a hose fitting.
  • reinforcing inserts e.g. With nominal widths of 40, 50, 65 and 80 mm, sufficiently rigid to press in a hose fitting.
  • a bellows can form when pressed in, which complicates or makes it impossible to install a hose fitting.
  • at least three, preferably four, holes are cut out adjacent to the hose end, which holes serve to accommodate hose supports that act as spacers. These are held in clamping shells, preferably identical to the plastic shells mentioned above.
  • the holes which are regularly distributed over the circumference of the hose, are expediently left out at the point where the first hose band will be attached later.
  • customary materials are used, which are determined by mechanical strength properties, workability and, in part, friction properties.
  • the primary materials used are metals, in particular steel, aluminum or brass, or suitable hard plastics, for example polyethylene.
  • the reinforced hose needs - especially when used as a low pressure hose - at most 1 - 3 Hose bands can be integrated.
  • the integration can also take place in any other, arbitrary way.
  • the hose produced with a device according to the invention for pressing in a hose fitting on one or both sides can be used for all types of transport hoses.
  • Important areas of application are flexible lines for the transportation of oil, natural gas, liquid and gaseous chemicals, food and beverages, e.g. Beer, wine, milk, fruit juices or spirits.
  • the device can be used particularly well in the food and beverage industry.
  • a smooth transition between the hose core and the fitting is particularly important with regard to hygiene.
  • the hose expansion that is therefore necessary increases the risk of injury to the hose core, but this is prevented by the use of the device according to the invention.
  • Fig. 1 shows a thick-walled hose 10 made of conventional materials, into which a clamping member designed as an expanding mandrel 12 with a corresponding outer diameter is inserted.
  • the end wall 14 of the expansion body which is outer with respect to the hose 10, has a distance L from the hose end which is greater than the length of the hose fitting 16, which has approximately the same inner diameter as the hose 10.
  • the expanding mandrel 12 is penetrated by a threaded rod 18 which extends over the entire device and into which a right-hand thread is screwed.
  • the expanding mandrel 12 - which cannot be seen in FIG. 1 - has already expanded in the radial direction, as a result of which the hose 10 and the 0-rings 28 have expanded somewhat.
  • two plastic shells 30 are arranged, each with a recess adapted to the outer diameter of the expanded hose 10.
  • the plastic shells 30 in their longitudinal direction through bores 31 are suitable, after inserting screws, to fasten the hose 10 with the device for pressing in at a suitable point.
  • a ring composed of four insertion segments 32 is placed, which is likewise penetrated by the threaded rod 18.
  • the cone 34 of the insertion segments 32 which tapers slightly in the direction of insertion of the hose fitting 16 has the effect that the hose opening is widened and can slide over the hose fitting 16 without damaging the hose core.
  • the hose fitting 16 lies with the other end face on the pressure plate 36. This is designed as a stepped washer such that all nominal widths of the hose fitting 16, in particular the DIN standards, can be attached.
  • the end face of the hose fitting facing away from the hose end can be designed as a flange which can be fastened to a corresponding base.
  • a crank 38 - the handle is not shown in FIG. 1 - is with its nut 40 on the threaded rod 38 screwed and forms a thrust bearing 42 when pulling with the thrust washer 36.
  • the nut 40 of the crank 38 can be clamped with a lock nut 44.
  • the lock nut 44 is arranged on one or the other side of the nut 40.
  • hose supports 70 are inserted into the form-fitting bores of the plastic shells 30, which are not visible in section.
  • an expanding mandrel 12 is shown in more detail. It consists of three identical segments 46, which therefore each form an angle of 120 ° with the center point. In the middle of each segment 46, a bore 48 is recessed in the radial direction, which is intended for receiving bolts. In the area of both end faces 14, 20 of the expansion body 12, the bore of the expansion body extending in the axial direction is widened. The opening angle ß is adapted to the conical nuts, it is half of their opening angle. The segments 46 are held together by two 0-rings 28.
  • extension segments 50 are shown, which are suitable for adapting the diameter of the segments 46 of FIGS. 2 and 3 to a larger nominal diameter of the hose.
  • the bolt (s) 52 of the extension segments 50 can be inserted into a corresponding hole (s) 48 in the segments 46 of the expanding mandrel 12.
  • the segments holding together elastic means are 0-rings 28, which are inserted into ring grooves.
  • Fig. 6 shows a cone nut 22, 26.
  • the first and second cone nuts differ in their geometrical Shape not. They have a thread 54 with which they can be screwed onto the threaded rod.
  • the conical jacket 56 of the conical nut has an opening angle 10 ⁇ of approximately 42 °, which is in particular in the range of 30-60 °.
  • the pressure plate 36 shown in axial section in FIG. 7 has four different contact surfaces 58 for hose armature with different, preferably standardized nominal diameters. With 42 the recess for forming the thrust bearing is designated.
  • FIG. 8 and 9 show an insertion ring formed from three insertion segments 32, which is placed on the hose fitting in the direction of the hose.
  • the conical surface 34 has an angle ⁇ of 15 ° with respect to the longitudinal axis. This conical surface is very smooth so that the hose to be expanded slides as well as possible.
  • the insertion segments 32 are pressed onto the end face of the hose fitting and are supported on their annular contact surface 60.
  • the end faces of the insertion segments 32 facing away from the hose have bores 62 in the middle (FIG. 9), into which a thread is screwed in the present case.
  • An auxiliary rod 64 according to FIG. 10 can be screwed into a bore 62 of each insertion segment 32.
  • a corrugated or rimmed head 66 enables the screwing in to be carried out easily by hand.
  • the length of the screw 68, corresponding to the bore 62 of FIG. 9, is approximately in the range of 12 mm. The threads are not necessary per se.
  • a holding mandrel 74 is inserted into the hose 10.
  • the holding mandrel 74 screwed onto a threaded rod 18 is fixed with a lock nut 76.
  • Two plastic shells 30 are introduced into the holes 31, not Darge put screws on the hose 10 pressed.
  • One of the total of four hose supports 70 is indicated outside the cutting plane.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
EP86810044A 1985-02-15 1986-01-27 Appareil pour l'insertion dans un tuyau d'une armature Withdrawn EP0191728A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH715/85 1985-02-15
CH71585 1985-02-15

Publications (1)

Publication Number Publication Date
EP0191728A1 true EP0191728A1 (fr) 1986-08-20

Family

ID=4193474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810044A Withdrawn EP0191728A1 (fr) 1985-02-15 1986-01-27 Appareil pour l'insertion dans un tuyau d'une armature

Country Status (1)

Country Link
EP (1) EP0191728A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444491A1 (fr) * 1990-02-27 1991-09-04 Ciro Mastromatteo Etau pour assemblage de jointures pour tuyaux flexibles
CN107120309A (zh) * 2017-06-29 2017-09-01 德阳宏源机电工程有限责任公司 用于离心压缩机的叶轮锁紧装置
CN108057996A (zh) * 2017-12-14 2018-05-22 株洲联诚集团控股股份有限公司 一种薄壁锥体工件加工工艺及其夹具装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227857A (en) * 1938-04-27 1941-01-07 William F Jamison Ring inserter
FR1260591A (fr) * 1960-01-09 1961-05-12 Appareil pour assurer l'insertion à force d'un embout de raccordement à l'intérieur d'un tuyau plastique
DE1288525B (de) * 1965-10-19 1969-01-30 Paul Josef Vorrichtung zum Aufpressen und Abziehen von Radnaben
DE3017595A1 (de) * 1980-05-08 1981-11-12 Klöckner-Werke AG, 4100 Duisburg Vorrichtung zum montieren und demontieren von maschinenteilen auf und von wellen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227857A (en) * 1938-04-27 1941-01-07 William F Jamison Ring inserter
FR1260591A (fr) * 1960-01-09 1961-05-12 Appareil pour assurer l'insertion à force d'un embout de raccordement à l'intérieur d'un tuyau plastique
DE1288525B (de) * 1965-10-19 1969-01-30 Paul Josef Vorrichtung zum Aufpressen und Abziehen von Radnaben
DE3017595A1 (de) * 1980-05-08 1981-11-12 Klöckner-Werke AG, 4100 Duisburg Vorrichtung zum montieren und demontieren von maschinenteilen auf und von wellen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444491A1 (fr) * 1990-02-27 1991-09-04 Ciro Mastromatteo Etau pour assemblage de jointures pour tuyaux flexibles
CN107120309A (zh) * 2017-06-29 2017-09-01 德阳宏源机电工程有限责任公司 用于离心压缩机的叶轮锁紧装置
CN108057996A (zh) * 2017-12-14 2018-05-22 株洲联诚集团控股股份有限公司 一种薄壁锥体工件加工工艺及其夹具装置
CN108057996B (zh) * 2017-12-14 2023-04-11 株洲联诚集团控股股份有限公司 一种薄壁锥体工件加工工艺及其夹具装置

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