EP2268961A1 - Closing system for pressurised ducts and related installation process - Google Patents

Closing system for pressurised ducts and related installation process

Info

Publication number
EP2268961A1
EP2268961A1 EP09721924A EP09721924A EP2268961A1 EP 2268961 A1 EP2268961 A1 EP 2268961A1 EP 09721924 A EP09721924 A EP 09721924A EP 09721924 A EP09721924 A EP 09721924A EP 2268961 A1 EP2268961 A1 EP 2268961A1
Authority
EP
European Patent Office
Prior art keywords
plug
seat
closing system
fitting
closing
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Withdrawn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
EP09721924A
Other languages
German (de)
French (fr)
Inventor
Roberto Ravetti
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2268961A1 publication Critical patent/EP2268961A1/en
Withdrawn legal-status Critical Current

Links

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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow from or in pipes or hoses
    • F16L55/11—Plugs

Definitions

  • the present invention refers to a closing system, in particular for closing shaped fittings for interception of fluids, particularly gas.
  • the present invention further refers to a process for installing such closing system.
  • Closing systems are known in the art, that are typically used for plugging shaped fittings used for intercepting ducts for transporting water, gas or other pressurised fluids.
  • Such shaped fitting whose shape is substantially cylindrical, has a shaped end that is welded to the duct around the opening of this latter one, that it is necessary to plug: the upper opening, typically circular, is then equipped with an internal threading adapted to be engaged by a corresponding threading obtained on the circumference around a closing plug: in order to then proceed to close the duct intercepting fitting, it is necessary to place the plug inside the fitting opening, take the respective threading to mesh and rotate the plug with respect to the fitting itself till its complete screwing. It is clear that the above operations are extremely difficult in case of fittings and related plugs whose sizes and weights are big. Moreover, closing the plug onto the fitting would be severely difficult, if not even impossible, if dirt, debris or other residuals should be inserted between the threads.
  • object of the present invention is solving the above prior art problems, by providing a closing system for a fitting in which the plug can be made integral with the related fitting without using an interposed threading, making the fitting plugging operation quicker, more practical and easier.
  • FIG. 1 shows a side sectional view of a first preferred embodiment of the closing system according to the present invention
  • FIG. 2 shows a side sectional view of a second preferred embodiment of the closing system according to the present invention
  • FIG. 3 shows an enlargement of the part contained in box A in FIG. 1;
  • FIG. 4 shows an enlargement of the part contained in box B in FIG. 2.
  • the closing system 1 comprises at least one fitting 3, whose shape is preferably tubular with a symmetry axis designated by straight line S-S in Figures 1 and 2, having a first end 5 thereof adapted to be made integral, for example through welding or other suitable fastening means, around an opening of a duct and a second end 7 equipped with an opening 9, whose shape is preferably circular, adapted to house inside it at least one closing plug 11, preferably in a concentric position with symmetry axis R-R, such plug 11 being made integral with the fitting 3, and in particular inside the opening 9 of the second end 7 of the fitting 3 through at least three radial fastening pins 13, therefore having a symmetry axis P-P orthogonal to the symmetry axis R-R of the fitting 3 and the plug 11, each adapted to engage at least one respective perimeter and radial seat 15 of the plug 11 itself, passing through at least one respective housing seat 17 of the radial fitting 3, therefore also having a
  • fitting 3 be made integral with a curvilinear surface of a duct, its first end 5 will be suitably shaped.
  • the fitting 3 is internally equipped with at least one abutment shoulder 19 of the plug 11 itself.
  • the shoulder 19 provides a conical abutment to the plug 11, exploiting the interference between the walls of the related materials.
  • the shoulder provides a plane abutment to the plug 11.
  • the shoulder 19 can have any other shape adapted to provide an abutment surface to the plug 11 and keep it in position inside the opening 9 of the fitting 3 to allow the insertion of the fastening pin 13 inside the housing seat 17 and engage the seat 15 of the plug 11.
  • this latter one can be preferably made as at least one perimeter groove to the plug 11: in such a way, coupling between housing seat 17 and seat 15 can occur whichever the angular orientation of the plug 11 is around the symmetry axis S-S once having abutted again the shoulder 19.
  • each one of the fastening pins 13 is equipped, at least partially, with an external threading 13a adapted to grip a corresponding internal threading to the housing seat 17 and with a fastening end 13b going out of the housing seat 17 to engage the seat 15 of the plug 11.
  • the seat 15 could have the side walls not parallel but tapered, in such a way as to create an interference with the fastening end 13b of the pin 13 sufficient to consolidate the cooperation between seat 15 and pin 13 itself.
  • every fastening pin 13 corresponding to the opening of the housing seat 17 communicating with the outside can be equipped with at least one seat 13c for inserting a tool suitable for screwing and unscrewing the fastening pin 13 necessary to make the plug 11 integral with the fitting 3 or, on the contrary, in case of following removal of the plug 11 itself.
  • the opening of the housing seat 17 communicating with the outside can be equipped with at least one protecting cover 21, also equipped with at least one threaded portion adapted to grip the internal threading of the housing seat 17: in this latter case, also the head of the protecting cover 21 could be equipped with at least one inserting seat 21a (for example an hexagonal recess) of a suitable tool for screwing and unscrewing the protecting cover 21.
  • connection means to any suitable fixture, such as for example a duct plugging device or a duct drilling device: such connection means could then comprise at least one manifold or a connecting flange.
  • the shaped fitting is welded onto the piping; then, he covers 21 are inserted to obtain, through the compression of the 0-ring 22, a perfect seal to pressure (in this step the fastening pins 13 have been removed from their seats 15) .
  • a temporary on-off valve (whose shape is preferably plate) is assembled, through which it is possible to drill the pressurised duct by means of a suitable tube-drilling machine.
  • a fluid intercepting system is assembled, and then one works on the duct without pressure, since interception is performed in two points, between which it is possible to intervene.
  • the third step consists in removing the intercepting system and in closing the temporary on-off valve.
  • the fourth step is inserting the plug 11 in its own seat 19 and obtaining the airtight plugging of the shaped fitting.
  • the plug 11 is inserted through Ia temporary on-off valve, till it is compressed in the seat 19 and the duct plugging and pressure sealing are obtained.
  • a suitable sealing fixture for example the tube-drilling machine or a system with an hydraulic cylinder

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Cable Accessories (AREA)
  • External Artificial Organs (AREA)

Abstract

A closing system (1) is described, for a shaped fitting (3) for intercepting fluids, in particular gas, having a first end (5) thereof adapted to be made integral around an opening of a duct and a second end (7) equipped with an opening (9) adapted to house inside it at least one closing plug (11), such plug (11) being made integral with the fitting (3) through at least three radial fastening pins (13) each adapted to engage at least one respective perimeter and radial seat (15) of the plug (11). A process for installing such closing system (1) is also described.

Description

CLOSING SYSTEM FOR PRESSURISED DUCTS AND RELATED INSTALLATION PROCESS
The present invention refers to a closing system, in particular for closing shaped fittings for interception of fluids, particularly gas. The present invention further refers to a process for installing such closing system.
Closing systems are known in the art, that are typically used for plugging shaped fittings used for intercepting ducts for transporting water, gas or other pressurised fluids.
Such shaped fitting, whose shape is substantially cylindrical, has a shaped end that is welded to the duct around the opening of this latter one, that it is necessary to plug: the upper opening, typically circular, is then equipped with an internal threading adapted to be engaged by a corresponding threading obtained on the circumference around a closing plug: in order to then proceed to close the duct intercepting fitting, it is necessary to place the plug inside the fitting opening, take the respective threading to mesh and rotate the plug with respect to the fitting itself till its complete screwing. It is clear that the above operations are extremely difficult in case of fittings and related plugs whose sizes and weights are big. Moreover, closing the plug onto the fitting would be severely difficult, if not even impossible, if dirt, debris or other residuals should be inserted between the threads.
Therefore, object of the present invention is solving the above prior art problems, by providing a closing system for a fitting in which the plug can be made integral with the related fitting without using an interposed threading, making the fitting plugging operation quicker, more practical and easier.
The above and other objects and advantages of the invention, as will appear from the following description, are obtained with a closing system as described in claim 1. Preferred embodiments and non-trivial variations of the present invention are the subject matter of the dependent claims.
It will be immediately obvious that numerous variations and modifications (for example related to shape, sizes, arrangements and parts with equivalent functionality) can be made to what is described, without departing from the scope of the invention as appears from the enclosed claims.
The present invention will be better described by some preferred embodiments thereof, provided as a non-limiting example, with reference to the enclosed drawings, in which:
- Figure 1 shows a side sectional view of a first preferred embodiment of the closing system according to the present invention;
- Figure 2 shows a side sectional view of a second preferred embodiment of the closing system according to the present invention;
- Figure 3 shows an enlargement of the part contained in box A in FIG. 1; and
- Figure 4 shows an enlargement of the part contained in box B in FIG. 2.
With reference to the Figures, it is possible to note that the closing system 1 according to the present invention comprises at least one fitting 3, whose shape is preferably tubular with a symmetry axis designated by straight line S-S in Figures 1 and 2, having a first end 5 thereof adapted to be made integral, for example through welding or other suitable fastening means, around an opening of a duct and a second end 7 equipped with an opening 9, whose shape is preferably circular, adapted to house inside it at least one closing plug 11, preferably in a concentric position with symmetry axis R-R, such plug 11 being made integral with the fitting 3, and in particular inside the opening 9 of the second end 7 of the fitting 3 through at least three radial fastening pins 13, therefore having a symmetry axis P-P orthogonal to the symmetry axis R-R of the fitting 3 and the plug 11, each adapted to engage at least one respective perimeter and radial seat 15 of the plug 11 itself, passing through at least one respective housing seat 17 of the radial fitting 3, therefore also having a symmetry axis coinciding with the symmetry axis P-P of the fastening pins 13, and passing through the second end of the fitting 3 itself.
Obviously, should the fitting 3 be made integral with a curvilinear surface of a duct, its first end 5 will be suitably shaped.
In order to keep the plug 11 next to the opening 9, and in particular to keep the perimeter and radial seat 15 of the plug 11 next to the housing seat 17 of the fitting 3 and to allow inserting the fastening pins 13, the fitting 3 is internally equipped with at least one abutment shoulder 19 of the plug 11 itself. In a preferred embodiment of the closing system 1 according to the present invention like the one shown in Figures 1 and 3, the shoulder 19 provides a conical abutment to the plug 11, exploiting the interference between the walls of the related materials. In another preferred embodiment of the closing system 1 according to the present invention, like the one shown for example in Figures 2 and 4, the shoulder provides a plane abutment to the plug 11. It is wholly evident that the shoulder 19 can have any other shape adapted to provide an abutment surface to the plug 11 and keep it in position inside the opening 9 of the fitting 3 to allow the insertion of the fastening pin 13 inside the housing seat 17 and engage the seat 15 of the plug 11.
In order to allow an easier alignment between housing seat 17 and seat 15 of the plug 11, this latter one can be preferably made as at least one perimeter groove to the plug 11: in such a way, coupling between housing seat 17 and seat 15 can occur whichever the angular orientation of the plug 11 is around the symmetry axis S-S once having abutted again the shoulder 19.
In a preferred embodiment thereof, each one of the fastening pins 13 is equipped, at least partially, with an external threading 13a adapted to grip a corresponding internal threading to the housing seat 17 and with a fastening end 13b going out of the housing seat 17 to engage the seat 15 of the plug 11. According to a preferred variation, the seat 15 could have the side walls not parallel but tapered, in such a way as to create an interference with the fastening end 13b of the pin 13 sufficient to consolidate the cooperation between seat 15 and pin 13 itself. The end of every fastening pin 13 corresponding to the opening of the housing seat 17 communicating with the outside can be equipped with at least one seat 13c for inserting a tool suitable for screwing and unscrewing the fastening pin 13 necessary to make the plug 11 integral with the fitting 3 or, on the contrary, in case of following removal of the plug 11 itself.
In order to protect each of the fastening pins 13 inside its own housing seat 17, and in particular to prevent residuals, impurities or dirt from entering inside the inserting seat 13c, making then difficult to use a tool inside it, the opening of the housing seat 17 communicating with the outside can be equipped with at least one protecting cover 21, also equipped with at least one threaded portion adapted to grip the internal threading of the housing seat 17: in this latter case, also the head of the protecting cover 21 could be equipped with at least one inserting seat 21a (for example an hexagonal recess) of a suitable tool for screwing and unscrewing the protecting cover 21.
The second end 7 of the fitting 3 can obviously be equipped with connection means to any suitable fixture, such as for example a duct plugging device or a duct drilling device: such connection means could then comprise at least one manifold or a connecting flange.
Herein below the operating steps are described for inserting the plug 11 during an interception operation on a pressurised duct.
The shaped fitting is welded onto the piping; then, he covers 21 are inserted to obtain, through the compression of the 0-ring 22, a perfect seal to pressure (in this step the fastening pins 13 have been removed from their seats 15) . On the upper part of the shaped fitting, a temporary on-off valve (whose shape is preferably plate) is assembled, through which it is possible to drill the pressurised duct by means of a suitable tube-drilling machine.
In a second step, in place of the tube- drilling machine, a fluid intercepting system is assembled, and then one works on the duct without pressure, since interception is performed in two points, between which it is possible to intervene.
The third step consists in removing the intercepting system and in closing the temporary on-off valve.
The fourth step is inserting the plug 11 in its own seat 19 and obtaining the airtight plugging of the shaped fitting.
By means of a suitable sealing fixture (for example the tube-drilling machine or a system with an hydraulic cylinder) the plug 11 is inserted through Ia temporary on-off valve, till it is compressed in the seat 19 and the duct plugging and pressure sealing are obtained.
Now, through a drain valve being present in the tube-drilling machine or in the system with hydraulic cylinder, the residual pressure is discharged, and it is now possible to unscrew the covers 21 and to screw the pins 13 into their own seats 15, at the same time obtaining a compression of the plug 11 in its seat.
This occurs since the seat 15, in its lower part, is not parallel, but has a slight taper in which the pins 13 create a force and a thrust towards the seat 19 of the shaped fitting.
When screwing of the pins 13 is completed, the covers 21 are screwed and the closing operation of the plug 11 of the shaped fitting for intercepting fluids is now completed.

Claims

1. Closing system (1) comprising at least one fitting (3) having a first end (5) thereof adapted to be made integral around an opening of a duct and a second end (7) equipped with an opening (9) adapted to house inside it at least one closing plug (11), characterised in that said plug (11) is made integral with said fitting (3) through at least three radial fastening pins (13) each adapted to engage at least one respective perimeter and radial seat (15) of said plug (11) .
2. Closing system (1) according to claim 1, characterised in that each one of said fastening pins (13) is passing through at least one respective radial and passing housing seat (17) of said fitting (3).
3. Closing system (1) according to claim 1, characterised in that said first end (5) is shaped.
4. Closing system (1) according to claim 1, characterised in that said fitting (3) is internally equipped with at least one abutment shoulder (19) of said plug (11) .
5. Closing system (1) according to claim 4, characterised in that said shoulder (19) is a conical abutment of said plug (11).
6. Closing system (1) according to claim 4, characterised in that said shoulder (19) is a plane abutment of said plug (11).
7. Closing system (1) according to claim 1, characterised in that seat (15) is at least one perimeter groove to said plug (11) .
8. Closing system (1) according to claim 2, characterised in that said fastening pin (13) is equipped, at least partially, with an external threading (13a) adapted to grip a corresponding internal threading to said housing seat (17) and with a fastening end (13b) going out of said housing seat (17) to engage said seat 15 of said plug (11) .
9. Closing system (1) according to claim 8, characterised in that side walls of said seat (15) are tapered to create an interference with said fastening end (13b) of said pin (13) .
10. Closing system (1) according to claim 2, characterised in that an end of each one of said fastening pins (13) corresponding to an opening of said housing seat (17) communicating with the outside is equipped with at least one inserting seat (13c) of a screwing and unscrewing tool.
11. Closing system (1) according to claim 10, characterised in that said opening of said housing seat (17) is equipped with at least one protecting cover (21) .
12. Closing system (1) according to claim 11, characterised in that said protecting cover (21) is equipped with at least one threaded portion adapted to grip said internal threading of said housing seat (17) and a head of said protecting cover (21) is equipped with at least one inserting seat (21a) , in particular an hexagonal recess, of a screwing and unscrewing tool.
13. Closing system (1) according to claim 1, characterised in that said second end (7) of said fitting (3) is equipped with at least one manifold or a connecting flange.
14. Process for installing a closing system (1) according to claim 1, characterised in that it comprises the steps of:
- welding the shaped fitting to the piping; inserting the covers (21) to obtain, by compressing an O-ring (22) , a perfect pressure seal;
- assembling, on the upper part of the shaped fitting, a temporary on-off valve through which drilling is performed of the pressurised duct by means of a tube-drilling machine;
- assembling, in place of the tube-drilling machine, a fluid intercepting system;
- working on the duct without pressure;
- removing the intercepting system and closing the temporary on-off valve;
- inserting the plug (11) in its seat (19) an obtaining the airtight plugging of the shaped fitting;
- by means of a sealing fixture, inserting the plug (11) through the temporary on-off valve, till it is compressed in its seat (19) and the duct plugging and pressure sealing are obtained;
- through a drain valve being present on the tube-drilling machine or in a system with hydraulic cylinder, discharging the residual pressure, unscrewing the covers (21) and screwing the pins (13) into their own seats (15), at the same time obtaining a compression of the plug (11) in its own seat;
- after having screwed the pins (13) , screwing the covers (21) and completing the closing operation of the plug (11) of the shaped fitting for intercepting fluids.
EP09721924A 2008-03-19 2009-02-13 Closing system for pressurised ducts and related installation process Withdrawn EP2268961A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20080209 ITTO20080209A1 (en) 2008-03-19 2008-03-19 PRESSURE CONDUCTING CLOSURE SYSTEM AND RELATED INSTALLATION PROCEDURE.
PCT/IT2009/000055 WO2009116109A1 (en) 2008-03-19 2009-02-13 Closing system for pressurised ducts and related installation process

Publications (1)

Publication Number Publication Date
EP2268961A1 true EP2268961A1 (en) 2011-01-05

Family

ID=40293282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09721924A Withdrawn EP2268961A1 (en) 2008-03-19 2009-02-13 Closing system for pressurised ducts and related installation process

Country Status (4)

Country Link
EP (1) EP2268961A1 (en)
IT (1) ITTO20080209A1 (en)
RU (1) RU2484355C2 (en)
WO (1) WO2009116109A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2661420C2 (en) * 2016-08-17 2018-07-16 Акционерное Общество "Волгоградгоргаз" Closing system for pressurized pipelines
RU2675429C2 (en) * 2017-05-26 2018-12-19 Акционерное Общество "Волгоградгоргаз" Device for installation of closing system for gas pipelines under pressure
RU202306U1 (en) * 2020-04-27 2021-02-11 Общество с ограниченной ответственностью Научно-инжиниринговая компания "АССИ" (ООО НИК "АССИ") WELDED FITTING FOR PRESSURE PIPING

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988111A (en) * 1958-10-06 1961-06-13 Williamson Inc T Fluid tight closure
US4344460A (en) * 1980-11-28 1982-08-17 Advance Valve Installations Apparatus for plugging a pressure piping system
US4513788A (en) * 1983-11-28 1985-04-30 Koppl Company Inc. Flange system for pipeline plugging
PL150144B1 (en) * 1986-04-04 1990-04-30 Clamp for hydraulically closing and making tight ends of internally pressurized pipes
US6810903B1 (en) * 1998-04-22 2004-11-02 Hydra-Stop, Inc. Conduit flow controller

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009116109A1 *

Also Published As

Publication number Publication date
RU2010142467A (en) 2012-04-27
RU2484355C2 (en) 2013-06-10
ITTO20080209A1 (en) 2008-06-18
WO2009116109A1 (en) 2009-09-24

Similar Documents

Publication Publication Date Title
US9803783B2 (en) Hand tightened hydraulic fitting
CN107257704B (en) Magnetic filter for central heating system
US20020070547A1 (en) Plumbing connection and disconnection system and method
US20080012326A1 (en) Connection valve
NO20140155A1 (en) Pipe coupling device for ladder and lock pipes
AU2019200148B2 (en) Sprinkler adapter and pipe plug
US7591484B2 (en) Quick-connect fitting
JP2008069831A (en) Valve device for removing pipe connecting member from branch part and removing method
WO2009116109A1 (en) Closing system for pressurised ducts and related installation process
EP1723361A1 (en) Pipe insert
CA2799765C (en) Valve flushing kit
US9857016B2 (en) Apparatus and a method for sealing a conduit
US20130098473A1 (en) Tool for Removing and Installing Plugs and Method of Operation
US11060651B2 (en) System and method for reducing environmental impact caused by hydraulic oil leaking from a tractor
US11353131B2 (en) Gate valve bonnet connector
RU2522278C1 (en) Pipeline plunger liquidation
CN208592800U (en) A kind of auxiliary disassembling tool of screw-in quick coupling
JP4421554B2 (en) Pipe sealing jig
US20210231246A1 (en) System and method for reducing environmental impact caused by hydraulic oil leaking from a tractor
US11098814B2 (en) Stem coupling
RU2661420C2 (en) Closing system for pressurized pipelines
JP6636767B2 (en) Antifreeze type air valve
CN101395322B (en) Plumbing fitting
JP3201320U (en) Cable support device
CA3062933A1 (en) Device for uncoupling a plug from a pulling head

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

17P Request for examination filed

Effective date: 20100805

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA RS

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20141223