ITGE20100120A1 - "PLASTIC PIPE FITTING" - Google Patents
"PLASTIC PIPE FITTING" Download PDFInfo
- Publication number
- ITGE20100120A1 ITGE20100120A1 IT000120A ITGE20100120A ITGE20100120A1 IT GE20100120 A1 ITGE20100120 A1 IT GE20100120A1 IT 000120 A IT000120 A IT 000120A IT GE20100120 A ITGE20100120 A IT GE20100120A IT GE20100120 A1 ITGE20100120 A1 IT GE20100120A1
- Authority
- IT
- Italy
- Prior art keywords
- fitting
- pipes
- ring
- sealing means
- gasket
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/04—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with a swivel nut or collar engaging the pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L17/00—Joints with packing adapted to sealing by fluid pressure
- F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
- F16L17/03—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips
- F16L17/035—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips the sealing rings having two lips parallel to each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts with metal rings which bite into the wall of the pipe
- F16L19/083—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts with metal rings which bite into the wall of the pipe the longitudinal cross-section of the ring not being modified during clamping
- F16L19/086—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts with metal rings which bite into the wall of the pipe the longitudinal cross-section of the ring not being modified during clamping with additional sealing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/091—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a ring provided with teeth or fingers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Description
DESCRIZIONE del brevetto per invenzione industriale avente per titolo: "Raccordo in plastica per tubi" DESCRIPTION of the patent for industrial invention entitled: "Plastic fitting for pipes"
TESTO DELLA DESCRIZIONE TEXT OF THE DESCRIPTION
La presente invenzione ha per oggetto le tubazioni per condutture di fluidi quali aria, gas, acqua e simili, ed in particolare riguarda un raccordo con corpo di plastica per tubi. The present invention relates to pipes for pipelines of fluids such as air, gas, water and the like, and in particular it relates to a fitting with a plastic body for pipes.
I raccordi per tubi comprendono normalmente un corpo dotato alle due estremità di mezzi di accoppiamento con i due tubi da raccordare, essendo previsti dei mezzi di tenuta all'interno di detto raccordo. Pipe fittings normally comprise a body provided at the two ends with coupling means with the two pipes to be connected, sealing means being provided inside said fitting.
Raccordare le condutture che sono sottoposte ad un carico ragguardevole di pressione di esercizio ha sempre presentato numerosi problemi, sia del punto di vista della resistenza meccanica del raccordo, che da quello della forza necessaria da applicare al serraggio del raccordo, senza incorrere in eccessi che potrebbero rivelarsi dannosi per la sua efficacia e durata. Connecting pipes that are subjected to a considerable operating pressure load has always presented numerous problems, both from the point of view of the mechanical resistance of the fitting, and from that of the force required to be applied to tighten the fitting, without incurring excesses that could prove to be harmful for its effectiveness and duration.
Nel brevetto No. 1.358.931 a nome della medesima richiedente, Ã ̈ descritto un raccordo per tubi che mira appunto ad owiare ai problemi sopra menzionati dei raccordi per tubi. In patent No. 1,358,931 in the name of the same applicant, a pipe fitting is described which aims precisely to obviate the above mentioned problems of pipe fittings.
Attualmente, i corpi dei raccordi per tubi vengono praticamente tutti fabbricati in materia plastica, il che semplifica grandemente la loro fabbricazione e ne riduce fortemente i costi. Tuttavia, il corpo in plastica di tali raccordi presenta l'inconveniente di assorbire umidità , con la tendenza quando sottoposto a forti pressioni ad espandersi allargandosi. Tale allargamento à ̈ grosso modo dell'ordine del 5%, e poiché gli O-ring di tenuta non riescono a compensare tale allargamento, la conseguenza à ̈ che il raccordo presenta delle perdite di fluido. Currently, the bodies of pipe fittings are practically all made of plastic, which greatly simplifies their manufacture and greatly reduces their costs. However, the plastic body of these fittings has the drawback of absorbing humidity, with the tendency when subjected to strong pressure to expand and widen. This widening is roughly in the order of 5%, and since the sealing O-rings cannot compensate for this widening, the consequence is that the fitting has fluid leaks.
La presente invenzione mira appunto ad owiare a tale inconveniente mediante abbinamento, all'O-ring presente in tali raccordi, di un secondo elemento di guarnizione che, nel caso di tubi di diametro relativamente piccolo (20, 25 mm) à ̈ sotto forma di un doppio O-ring, mentre nel caso di tubi di diametro maggiore, nei quali anche il doppio O-ring non à ̈ sufficiente, si impiega un O-ring in combinazione con una guarnizione a labbro. The present invention aims precisely to obviate this drawback by combining, with the O-ring present in these fittings, a second gasket element which, in the case of pipes with a relatively small diameter (20, 25 mm), is in the form of a double O-ring, while in the case of larger diameter pipes, in which even the double O-ring is not sufficient, an O-ring is used in combination with a lip seal.
Ulteriori scopi e vantaggi del presente trovato appariranno meglio nel corso della seguente descrizione di alcune forme esecutive di realizzazione dello stesso, eseguita con riferimento ai disegni allegati, nei quali: Further objects and advantages of the present invention will become clearer in the course of the following description of some embodiments of the same, carried out with reference to the attached drawings, in which:
La figura 1 Ã ̈ una vista prospettica esplosa di un raccordo secondo una prima forma esecutiva del presente trovato; Figure 1 is an exploded perspective view of a fitting according to a first embodiment of the present invention;
La figura 2A Ã ̈ una vista prospettica esplosa di un raccordo secondo una seconda forma esecutiva del presente trovato; Figure 2A is an exploded perspective view of a fitting according to a second embodiment of the present invention;
La figura 28 Ã ̈ una vista prospettica esplosa del medesimo raccordo di figura 2A, ruotato di 180<0>attorno al suo asse trasversale rispetto al raccordo illustrato in figura 2A; Figure 28 is an exploded perspective view of the same fitting as in figure 2A, rotated by 180 <0> around its transverse axis with respect to the fitting shown in figure 2A;
La figura 3A Ã ̈ una vista in pianta dall'alto di una guarnizione a labbra secondo il trovato; Figure 3A is a top plan view of a lip seal according to the invention;
La figura 38 Ã ̈ una vista in pianta dal basso della medesima guarnizione di figura 3A. e Figure 38 is a bottom plan view of the same gasket of Figure 3A. And
La figura 3C Ã ̈ una vista in sezione secondo un piano diametrale della guarnizione di figure 3A e 38. Figure 3C is a sectional view according to a diametrical plane of the gasket of Figures 3A and 38.
Nella seguente descrizione per le parti eguali o corrispondenti a quelle del giunto illustrato nel brevetto No. 1.358.931 della medesima richiedente si sono adottati i medesimi numeri di riferimento. Per una migliore descrizione del funzionamento di queste parti del giunto, si rimanda pertanto alla descrizione di tale brevetto precedente. In the following description, the same reference numbers have been adopted for the parts equal or corresponding to those of the joint illustrated in the patent No. 1,358,931 of the same applicant. For a better description of the operation of these parts of the joint, reference should therefore be made to the description of this previous patent.
Con riferimento alla figura 1, il giunto illustrato comprende un corpo cilindrico 1 alle cui due estremità sono accoppiate le ghiere 2, identiche fra loro, che consentono il bloccaggio del raccordo sui tubi (non illustrati). L'estremità di ciascuna ghiera 2 rivolta verso il corpo 1 presenta una corona dentata 102 provvista dei denti 112 che cooperano con i denti 111 sporgenti dal corpo 1. Il corpo tubolare 1 presenta inoltre al suo interno a ciascuna sua estremità uno spallamento anulare 311 sporgente radialmente verso l'interno per gli scopi che saranno descritti a seguito. With reference to Figure 1, the illustrated joint comprises a cylindrical body 1 at the two ends of which the identical ring nuts 2 are coupled, which allow the connection to be locked on the pipes (not illustrated). The end of each ring nut 2 facing the body 1 has a toothed crown 102 provided with the teeth 112 which cooperate with the teeth 111 protruding from the body 1. The tubular body 1 also has an annular shoulder 311 protruding inside it at each of its ends. radially inward for the purposes to be described below.
Con 601 à ̈ indicato un organo di spinta, provvisto di un codolo 611. Tale organo 601 coopera dal lato opposto a quello recante il codolo 611 con l'anello di afferramento 402, mentre il codolo 611 coopera con la cavità del corpo 1. Con 501 si à ̈ indicata una delle filettature esterne formate alle estremità del corpo 1, che vengono in presa con le corrispondenti filettature interne delle ghiere 2. With 601 a thrust member is indicated, provided with a tang 611. This member 601 cooperates on the opposite side to that bearing the tang 611 with the grasping ring 402, while the tang 611 cooperates with the cavity of the body 1. With 501 indicates one of the external threads formed at the ends of the body 1, which come into contact with the corresponding internal threads of the ring nuts 2.
Conformemente alla tecnica nota, evidenziata dal brevetto No. 1.358.931 della medesima richiedente, fra l'estremità 611 del codolo 601 e lo spallamento 311 del corpo 1 viene interposto un O-ring. Come tuttavia si à ̈ detto in preambolo, se si utilizzano dei raccordi con il corpo in plastica questi, a seguito dell'assorbimento di umidità , presentano la tendenza quando sottoposti a forti pressioni ad espandersi allargandosi. Tale allargamento à ̈ grosso modo dell'ordine del 5%, e poiché gli O-ring di tenuta non riescono a compensare tale allargamento, la conseguenza à ̈ che il raccordo presenta delle perdite di fluido. In accordance with the known art, highlighted in patent No. 1,358,931 of the same applicant, an O-ring is interposed between the end 611 of the tang 601 and the shoulder 311 of the body 1. However, as stated in the preamble, if fittings with a plastic body are used, following the absorption of humidity, they tend to expand and expand when subjected to strong pressures. This widening is roughly in the order of 5%, and since the sealing O-rings cannot compensate for this widening, the consequence is that the fitting has fluid leaks.
Secondo una prima forma esecutiva dell'invenzione, si à ̈ scoperto in maniera del tutto sorprendente che qualora fra l'estremità del codolo 611 dell'organo anulare di spinta 601 e lo spallamento 311 del corpo 1 vengano inserite due guarnizioni toroidali 401, 401" al posto di una sola guarnizione, tale inconveniente viene fortemente limitato, e nel caso di raccordi per tubazioni del diametro sino a 20,25 mm , tale inconveniente viene del tutto eliminato. According to a first embodiment of the invention, it has been found in a quite surprising way that if two toroidal seals 401, 401 are inserted between the end of the shank 611 of the annular thrust member 601 and the shoulder 311 of the body 1 " instead of a single gasket, this drawback is greatly limited, and in the case of pipe fittings with a diameter of up to 20.25 mm, this drawback is completely eliminated.
Secondo una ulteriore caratteristica della presente invenzione, si à ̈ scoperto che tale inconveniente viene completamente eliminato anche per raccordi per tubi di diametro maggiore di 25 mm, se l'O-ring 401' viene sostituito da una guarnizione a labbra del tipo illustrato nelle figure 3A a 3C dei disegni allegati. According to a further characteristic of the present invention, it has been found that this drawback is completely eliminated even for pipe fittings with a diameter greater than 25 mm, if the O-ring 401 'is replaced by a lip seal of the type illustrated in the figures 3A to 3C of the attached drawings.
Con riferimento a dette figure 3A a 3C, con 7 si à ̈ indicata la guarnizione a labbra. Detta guarnizione comprende un corpo anulare cilindrico 107 che si raccorda ad una estremità con un corpo anulare troncoconico 207 che si estende all'interno del corpo cilindrico 107. Le pareti interne del corpo 107 e di quello 207 sono collegate fra di loro ad intervalli regolari da una pluralità di elementi radiali 307. With reference to said figures 3A to 3C, 7 indicates the lip seal. Said gasket comprises a cylindrical annular body 107 which is connected at one end with a truncated conical annular body 207 which extends inside the cylindrical body 107. The internal walls of the body 107 and 207 are connected to each other at regular intervals by a plurality of radial elements 307.
Come illustrato nelle figure 2A e 28, tale guarnizione 7 viene introdotta nel raccordo per tubi al posto della guarnizione 401', con il lato che espone gli elementi radiali 307 rivolto verso l'imbocco di alloggiamento dei tubi da raccordare. As illustrated in Figures 2A and 28, this gasket 7 is introduced into the pipe fitting in place of the gasket 401 ', with the side that exposes the radial elements 307 facing the housing mouth of the tubes to be connected.
Naturalmente la presente invenzione non à ̈ limitata alle forme esecutive illustrate e descritte, ma comprende tutte quelle varianti esecutive rientranti nell'ambito più vasto delle allegate rivendicazioni. Naturally, the present invention is not limited to the illustrated and described embodiments, but includes all those embodiments that fall within the broader scope of the attached claims.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITGE2010A000120A IT1402495B1 (en) | 2010-11-04 | 2010-11-04 | "PLASTIC PIPE FITTING" |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITGE2010A000120A IT1402495B1 (en) | 2010-11-04 | 2010-11-04 | "PLASTIC PIPE FITTING" |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ITGE20100120A1 true ITGE20100120A1 (en) | 2012-05-05 |
| IT1402495B1 IT1402495B1 (en) | 2013-09-13 |
Family
ID=43742623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ITGE2010A000120A IT1402495B1 (en) | 2010-11-04 | 2010-11-04 | "PLASTIC PIPE FITTING" |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1402495B1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2871031A (en) * | 1955-10-11 | 1959-01-27 | Keasbey & Mattison Company | Pipe coupling |
| US3390890A (en) * | 1966-09-16 | 1968-07-02 | Clow Corp | Push-joint and gasket for cast pipe |
| LU67789A1 (en) * | 1973-06-14 | 1973-08-16 | ||
| US4036512A (en) * | 1974-10-01 | 1977-07-19 | Robert Arthur Francis | Pipe joints |
| US4095826A (en) * | 1975-12-01 | 1978-06-20 | Endermill Anstalt | Connector for rigid plastics pipes |
| DE2937193A1 (en) * | 1978-09-18 | 1980-03-20 | Wavin Bv | Device for coupling plastics pipeline sections - has tubular take=up and inserting sections with ring seal and clamping ring |
| FR2512917A1 (en) * | 1981-05-20 | 1983-03-18 | Everitube | Elastic seal ring dressing for pipework joints - has two annular rims forming rectangular trapezoidal meridian section with square spaced cells |
-
2010
- 2010-11-04 IT ITGE2010A000120A patent/IT1402495B1/en active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2871031A (en) * | 1955-10-11 | 1959-01-27 | Keasbey & Mattison Company | Pipe coupling |
| US3390890A (en) * | 1966-09-16 | 1968-07-02 | Clow Corp | Push-joint and gasket for cast pipe |
| LU67789A1 (en) * | 1973-06-14 | 1973-08-16 | ||
| US4036512A (en) * | 1974-10-01 | 1977-07-19 | Robert Arthur Francis | Pipe joints |
| US4095826A (en) * | 1975-12-01 | 1978-06-20 | Endermill Anstalt | Connector for rigid plastics pipes |
| DE2937193A1 (en) * | 1978-09-18 | 1980-03-20 | Wavin Bv | Device for coupling plastics pipeline sections - has tubular take=up and inserting sections with ring seal and clamping ring |
| FR2512917A1 (en) * | 1981-05-20 | 1983-03-18 | Everitube | Elastic seal ring dressing for pipework joints - has two annular rims forming rectangular trapezoidal meridian section with square spaced cells |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1402495B1 (en) | 2013-09-13 |
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