DK143237B

DK143237B - INSPECTION WINDOW

Info

Publication number: DK143237B
Application number: DK398976AA
Authority: DK
Inventors: U J Lehtinen
Original assignee: U J Lehtinen
Priority date: 1975-09-05
Filing date: 1976-09-03
Publication date: 1981-07-27
Also published as: DK398976A; SE7609804L; FI56583C; FI752509A7; DE2639858A1; SE433252B; DK143237C; GB1554304A; FI56583B

Description

143237143237

Den foreliggende opfindelse angår et inspektionsvindue, hvori der indgår et af glas eller andet lignende transparent materiale bestående rørafsnit, og som iøvrigt er af den i kravets indledende del angivne type til montering i en rørledning.The present invention relates to an inspection window which includes a tube section of glass or other similar transparent material and which is otherwise of the type specified in the preamble of the claim for mounting in a pipeline.

05 Der kendes allerede inspektionsvinduer eller -glas af denne art, hvori der ud over egentlige pakningsringe anvendes separate styreringe med det resultat, at de gevindkoblinger, som er nødvendige for tilslutningerne, bliver betragteligt store. Der kendes også en konstruktion, hvori inspektionsglassets ender har en konisk kappe-10 form, og udover ovennævnte ulempe har denne sidstnævnte konstruktion den yderligere ulempe, at det er svært at understøtte glasset og at beskytte dette mod eventuelle slag og stød. De kendte konstruktioner er endvidere dyre, og deres vedligeholdelse er omstændelig.05 Inspection windows or glass of this kind are already known, in which separate control rings are used in addition to actual sealing rings, with the result that the threaded couplings necessary for the connections become considerably large. There is also known a construction in which the ends of the inspection glass have a conical casing shape, and in addition to the above disadvantage, this latter construction has the further disadvantage that it is difficult to support the glass and to protect it from any impact and impact. Furthermore, the known designs are expensive and their maintenance is elaborate.

15 Inspektionsglas anvendes i rørledninger inden for levnedsmiddel industrien, hvor der stilles særligt store krav med hensyn til rengøring, tilsyn og service. Inspektionsglassets konstruktion må derfor opfylde sådanne krav, og især må det være muligt at foretage en let udtagning af inspektionsglasset med henblik på eftersyn, rens-20 ning og reparation, hvorefter inspektionsglasset skal være let at genindsætte.15 Inspection glass is used in pipelines in the food industry, where there are particularly high requirements regarding cleaning, supervision and service. The design of the inspection glass must therefore meet such requirements, and in particular it must be possible to easily remove the inspection glass for inspection, cleaning and repair, after which the inspection glass must be easily reinserted.

Der kendes pakningsringe med flanger til brug ved tætsluttende forbindelse af rørender i en rørledning. Sådanne kendte pakningsringe er imidlertid ikke egnede til brug i forbindelse med in-25 spektionsvinduer eller inspektionsglas af den aktuelle type, idet flangernes udformning og anbringelse blandt andet gør det vanskeligt eller umuligt at foretage den ovenfor omtalte udtagning og genindsættelse i sideretningen. Desuden er kendte pakningsringe ikke egnede til at beskytte det transparente rørafsnit i et inspektionsvindue imod 30 knusning, når det monteres og indspændes imellem enderne i en rørledning. Eksempler på sådanne kendte pakningringe kendes fra schweisisk patentskrift 340.392 samt britisk patentskrift I.I2I.280.Packing rings with flanges are known for use in tightly connecting pipe ends in a pipeline. However, such known packing rings are not suitable for use in connection with inspection windows or inspection glass of the current type, since the design and placement of the flanges, among other things, makes it difficult or impossible to carry out the above mentioned removal and reinsertion. Furthermore, known seal rings are not suitable for protecting the transparent pipe section of an inspection window against crushing when mounted and clamped between the ends of a pipeline. Examples of such known packing rings are known from Swiss patent specification 340.392 and British patent specification I.I2I.280.

Et inspektionsglas bør muliggøre iagttagelse af den i rørledningen strømmende substans, hvilket forudsætter anvendelse af et trans-35 parent materiale, såsom glas. Til trods for dette må inspektionsglasset ikke være skrøbeligt og let at knuse.An inspection glass should allow observation of the substance flowing into the pipeline, which requires the use of a trans-parent material such as glass. Despite this, the inspection glass must not be fragile and easy to crush.

143237 2143237 2

Ovennævnte krav opfyldes af inspektionsvinduet ifølge opfindelsen, der er ejendommelig ved det i kravets kendetegnende del angivne. I inspektionsvinduet ifølge opfindelsen består hver pakning således af en ring, der har en første flange, som på i og for sig kendt 05 måde tjener som tætning imellem det transparente rørafsnits ende og rørledningens ende. En anden flange tjener som en centrerings- og afstandsring imellem det transparente rørafsnit og enden af beskyttelsesdelen. Endelig frembringer en tredie flange tætning imellem beskyttelsesdelens ende og rørledningens ende. Pakningerne kan cen-10 trere og sammenholde det transparente rørafsnit og beskyttelsesdelen som en kompakt enhed, der er let at montere i eller udtage fra en rørledning. I den af pakningerne sammenholdte enhed har beskyttelsesdelen større længde end det transparente rørafsnit, hvilket bevirker, at rørafsnittet, der oftest er af glas, ikke kan knuses, når 15 koblingerne, der oftest er omløbermøtrikker, spændes til.The above requirements are met by the inspection window according to the invention, which is characterized by the characterizing part of the claim. Thus, in the inspection window according to the invention, each gasket consists of a ring having a first flange which, in a manner known per se, serves as a seal between the end of the transparent pipe section and the end of the pipeline. Another flange serves as a centering and spacing ring between the transparent pipe section and the end of the protective member. Finally, a third flange seals between the end of the protective member and the end of the pipeline. The gaskets can center and compare the transparent pipe section and the protective section as a compact unit that is easy to install or remove from a pipeline. In the unit bonded by the gaskets, the protective portion has a greater length than the transparent pipe section, which means that the pipe section, which is most often of glass, cannot be crushed when the couplings, which are usually rotating nuts, are tightened.

Den foreliggende opfindelse skal i det følgende forklares nærmere ud fra en udførelsesform og under henvisning til tegningen, hvor fig. 1 viser et inspektionsvindue ifølge opfindelsen indsat mel-20 lem rørender som en del af en rørledning, og fig. 2 en i inspektionsvinduet ifølge opfindelsen indgående pakningsring med tre flanger.BRIEF DESCRIPTION OF THE DRAWINGS The present invention will now be explained in more detail from one embodiment and with reference to the accompanying drawings, in which: 1 shows an inspection window according to the invention inserted between pipe ends as part of a pipeline; and FIG. 2 shows a three-flange packing ring included in the inspection window according to the invention.

I fig. 1 er en rørlednings ender betegnet med henvisningstallene 1a og 1b. Mellem disse ender og som en del af rørledningen lig-25 ger et inspektionsvindue eller -glas ifølge opfindelsen, hvori der indgår et af glas eller et andet tilsvarende transparent materiale bestående rørafsnit 2 samt en beskyttelsesdel 3, som omgiver rørafsnittet, og som har åbninger, såsom de viste og på modstående sider liggende inspektionsåbninger 4. Beskyttelsesdelen har gevind ved 30 enderne og hermed samvirkende koblinger 5a i form af omløbermøtrik-ker.In FIG. 1, the ends of a pipeline are designated by reference numerals 1a and 1b. Between these ends and as part of the pipeline there is an inspection window or glass according to the invention, which includes a glass section or other similar transparent material consisting of pipe section 2 and a protective part 3 which surrounds the pipe section and which has openings, such as the inspection apertures shown and on opposite sides 4. The protective member has threads at the ends and cooperating couplings 5a in the form of a nut.

Paknings- eller tætningsringe i inspektionsvinduet ifølge opfindelsen er betegnet med 6a eller 6b. Disse ringes konstruktive detaljer fremgår af fig. 2.Gasket or seal rings in the inspection window according to the invention are designated 6a or 6b. The constructive details of these rings are shown in FIG. 2nd

35 Som vist i fig. 2 har en pakningsring 6a eller 6b, der består af gummi eller et andet til formålet hensigtsmæssigt materiale, en indadrettet første flange 7, der er udformet til at tjene som tætning35 As shown in FIG. 2, a gasket ring 6a or 6b consisting of rubber or other suitable material has an inwardly directed first flange 7 which is designed to serve as a seal

Claims

U 3237 between the ends of the glass pipe section and the pipeline. Another flange 9 of the packing ring is arranged to be placed between the glass tube section 2 and the protective part 3 as a centering and intermediate layer ring. For the best possible centering, the outer surface of the ring flange 9 05 is configured somewhat conically as indicated in FIG.

2, and for good sealing, the flange 7 is somewhat conical as shown in FIG. 2. Finally, a third flange 8, directed opposite to the first flange 7, is arranged to serve as a sealing flange between one end of the protective member 3 and the end face of an adjacent pipe line 1a or 1b. By means of these as well as other formal details which are within the scope of the invention, an appropriate function of the centering and packing ring is assured according to the field of application and the material used for the ring. The basic shape and shape of the ring is such that the pressure differences or underpressures in the pipe system cannot force individual parts of the inspection window out of position. The inside of the pipeline will remain as smooth as possible at the connection points, which is important in view of the flow conditions and self-cleaning. The inspection window components are easy to replace and maintenance is simple since the entire inspection window can be pulled out from the pipe system after the couplings or the nut 5a are unscrewed. When the inspection window is mounted in a pipeline, one can observe the fluid flow and its quality, such as color, clarity, vacuum bubbles, etc. Behind the inspection opening 4, a light source can be installed, thereby simplifying the observation. An inspection window comprising a tube section (2) of glass or other similar transparent material, a protective section (3) surrounding the tube section, and couplings and gaskets for the inspection window connection in a pipeline (1a, 1b) to form a 35 a portion thereof, the protective portion (3) having a greater axial length than the transparent pipe portion (2), and each gasket comprising a ring (6a or 6b) with flanges, a first of which