WO2004083693A1 - Fluid flow cut-off valve, particularly for pipe fittings destined to the transport of oil and chemical products - Google Patents

Fluid flow cut-off valve, particularly for pipe fittings destined to the transport of oil and chemical products Download PDF

Info

Publication number
WO2004083693A1
WO2004083693A1 PCT/EP2004/002835 EP2004002835W WO2004083693A1 WO 2004083693 A1 WO2004083693 A1 WO 2004083693A1 EP 2004002835 W EP2004002835 W EP 2004002835W WO 2004083693 A1 WO2004083693 A1 WO 2004083693A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
spherical body
fluid
packing
destined
Prior art date
Application number
PCT/EP2004/002835
Other languages
French (fr)
Inventor
Lorenzo Bormioli
Original Assignee
Lorenzo Bormioli
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 Lorenzo Bormioli filed Critical Lorenzo Bormioli
Publication of WO2004083693A1 publication Critical patent/WO2004083693A1/en

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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0663—Packings
    • F16K5/0673—Composite packings

Definitions

  • the present invention concerns a fluid flow cut-off valve, particularly for pipe fittings destined to the transport of oil and chemical fluids.
  • EP-A-0153773 15 example in EP-A-0153773 and it comprises two fitting parts attachable to respective pipes and quick-coupling and quick-release means suitable to connect the two fitting parts with each other. Each one of these is provided with a respective cut-off valve, that has the duty to interrupt the flow of the fluid, in particular just before the uncoupling of the fitting.
  • the known cut-off valves comprise a body with spherical shape with passing through cylindrical duct. Their fluid-tightness when in closing position is assured by packings supported by mobile seats that are elastically biased and placed upstream of the valve in the direction of the flow of the fluid. Due to the effect of their progressive wear, and also because of the
  • object of the present invention is to provide a cut-off valve that, without requiring the addition of a second valve, allows the fitting to work always in safety conditions.
  • a cut-off valve comprising a spherical body passed through by a diametral duct and a first water-tightness packing placed upstream of said spherical body in the direction of the flow of fluid and elastically maintained against said spherical body, characterised in that it has a second water-tightness packing placed downstream of said spherical body and elastically maintained against it.
  • a valve of this kind placed in the fitting part which is closer to the fluid source evidently assures the interception of the fluid also in the case in which the packing upstream decreases its water-tightness.
  • a degree of guarantee against leakage is thus obtained that is comparable to the one offered by two valves arranged one after the other, but with the volumes and the weights of a single valve.
  • Figure 1 shows a longitudinal section of a pipe fitting with cut-off valves closed
  • Figure 2 shows in magnified scale a detail of Figure 1;
  • Figure 3 shows a longitudinal section of a pipe fitting with open cut-off valves.
  • a fitting 1 is shown that is made up of two parts 14- 15, each one of which comprises a body 16 passed through by a channel 24 and a flange 19 drawn near frontally and kept coupled to the corresponding flange 19 of the other fitting part by quick-coupling and quick-release means, not shown and known per se, as for example from EP-A-0153773.
  • a corresponding end 20 of one of the two pipes 21 coupled to each other by the fitting 1 is fastened by means of screws.
  • the flow of fluid through the channels 24 of the two fitting parts is controlled by cut-off valves 17-18, one for each fitting part, which are made up of a spherical body 3, with a passing through cylindrical duct 4, revolvable around a barycentric transversal axis by means of a driving shaft 5 integral with it, held in position by opportune fastening systems.
  • cut-off valves 17-18 one for each fitting part, which are made up of a spherical body 3, with a passing through cylindrical duct 4, revolvable around a barycentric transversal axis by means of a driving shaft 5 integral with it, held in position by opportune fastening systems.
  • valve 17 precedes valve 18 in the direction of flow of the fluid (arrow F in Figure 3).
  • the shafts 5 of the two valves 17 and 18 are connected with each other by means known per se and not shown, that make the opening and closing movements of the two valves synchronous.
  • the valve 17 ( Figure 2) and the valve 18 have upstream of the spherical bodies 3 respective annular packings 6 supported by mobile seats 7 and held in position by threaded ring nuts 12.
  • the mobile seats 7 are inserted in sliding way into the respective bodies 16 and they are biased to maintain the respective packings 6 against the spherical bodies 3 by Belleville washers 9 placed around hinges 10 inserted in cavities 29 of the respective bodies 16 and supported by threaded ring nuts 11 screwed onto the mobile seats 7.
  • O- Rings 13 provide the water-tightness between said mobile seats 7 and the bodies 16.
  • the valve 17 ( Figure 2) has in addition downstream of the spherical body 3 an additional annular packing 30 supported by a mobile seat 31 and held in position by a threaded ring nut 32.
  • the mobile seat 31 is inserted in sliding way into the body 16 and is biased to maintain the packing 30 against the spherical body 3 by Belleville washers 33 placed around hinges 34 inserted in cavities 36 of the body 16 and supported by a threaded ring nut 37 that is screwed onto the mobile seat 31.
  • the fluid coming from the pipe 21 situated on the right in Figures 1 and 3, enters the nearby channel 24 and meets the cut-off valve 17. If this is in opening position (Figure 3), said fluid continues its flow through the cylindrical duct 4 in order to get then into the fitting part 14. Since the synchronised valves 17-18 are two, the valve 18 will be in opening position too thus allowing the passage of the fluid that finally exits from the fitting 1 and goes into the pipe 21 situated on the left in Figures 1 and 3.
  • valve 17 If the valve 17 is closed ( Figures 1 and 2), the fluid in pression thrusts the mobile seat 7 in the direction of flow of the same fluid and, helped by the washers 9, causes the packing 6 to tighten against the spherical body 3, withholding the fluid upstream of valve. If because of wear or of difficult operating conditions, there are leakages between the packing 6 and the spherical body 3 with consequent flooding of the chamber 35, the fluid is besides withheld by the second packing 30 that is thrust in turn in watertight conditions against the spherical body 3 by the same fluid and by the washers 33. A greater reliability of the fitting is therefore assured.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)
  • Valve Housings (AREA)
  • Joints Allowing Movement (AREA)

Abstract

A cut-off valve (17) particularly suitable for pipe fittings destined to the transport of oil and chemical fluid products comprises a spherical body (3) passed through by a diametral duct (4) and a first water-tightness packing (6) placed upstream of said spherical body (3) in the direction of flow of the fluid and elastically maintained against said spherical body (3). The valve has a second water-tightness packing (30) placed downstream of said spherical body (3) and elastically maintained against it.

Description

FLUID FLOW CUT-OFF VALVE , PARTICULARLY FOR PIPE FITTINGS FOR PIPES DESTINED TO THE TRANSPORT OF OIL AND CHEMICAL PRODUCTS
DESCRIPTION
5 The present invention concerns a fluid flow cut-off valve, particularly for pipe fittings destined to the transport of oil and chemical fluids.
By the term "fitting" a connector for flanges capable to connect easily and to disconnect in a secure and quick way the same flanges, both in normal conditions as well as in safety conditions, is meant.
10 There are known pipe fittings that are used in order to connect to each other in a quickly separable way pipes destined to the transport of fluid oil products, in particular from one ship to land and viceversa, or from an extraction platform to a ship or from ship to ship or from ship or platform to extraction wells at sea bottom and so on. One of these is described for
15 example in EP-A-0153773 and it comprises two fitting parts attachable to respective pipes and quick-coupling and quick-release means suitable to connect the two fitting parts with each other. Each one of these is provided with a respective cut-off valve, that has the duty to interrupt the flow of the fluid, in particular just before the uncoupling of the fitting.
20 The known cut-off valves comprise a body with spherical shape with passing through cylindrical duct. Their fluid-tightness when in closing position is assured by packings supported by mobile seats that are elastically biased and placed upstream of the valve in the direction of the flow of the fluid. Due to the effect of their progressive wear, and also because of the
25 difficult servicing conditions in which said fittings operate, it is possible that the water-tightness of the packings deteriorates with consequent possible leaks of fluid. If this happens, with uncoupled fitting, for the valve of the fitting part closer to the source of the fluid flow, this determines the waste of product and with it considerable environmental and economic damages.
30 In order to obviate such inconvenience it is often provided to insert in the pipe upstream, where there is fluid in pressure, two valves in sequence. With this the risk of a leakage is decreased, but with greater volume and costs.
In view of this state of the art, object of the present invention is to provide a cut-off valve that, without requiring the addition of a second valve, allows the fitting to work always in safety conditions.
According to the invention such object is attained with a cut-off valve comprising a spherical body passed through by a diametral duct and a first water-tightness packing placed upstream of said spherical body in the direction of the flow of fluid and elastically maintained against said spherical body, characterised in that it has a second water-tightness packing placed downstream of said spherical body and elastically maintained against it.
A valve of this kind placed in the fitting part which is closer to the fluid source evidently assures the interception of the fluid also in the case in which the packing upstream decreases its water-tightness. In short, a degree of guarantee against leakage is thus obtained that is comparable to the one offered by two valves arranged one after the other, but with the volumes and the weights of a single valve. These and other characteristics of the present invention will be made more evident from the following detailed description of an embodiment thereof that is described as a non limiting example in the enclosed drawings, in which:
Figure 1 shows a longitudinal section of a pipe fitting with cut-off valves closed;
Figure 2 shows in magnified scale a detail of Figure 1;
Figure 3 shows a longitudinal section of a pipe fitting with open cut-off valves.
In Figures 1 and 3 a fitting 1 is shown that is made up of two parts 14- 15, each one of which comprises a body 16 passed through by a channel 24 and a flange 19 drawn near frontally and kept coupled to the corresponding flange 19 of the other fitting part by quick-coupling and quick-release means, not shown and known per se, as for example from EP-A-0153773. To each body 16 a corresponding end 20 of one of the two pipes 21 coupled to each other by the fitting 1 is fastened by means of screws.
The flow of fluid through the channels 24 of the two fitting parts is controlled by cut-off valves 17-18, one for each fitting part, which are made up of a spherical body 3, with a passing through cylindrical duct 4, revolvable around a barycentric transversal axis by means of a driving shaft 5 integral with it, held in position by opportune fastening systems. The valve
17 precedes valve 18 in the direction of flow of the fluid (arrow F in Figure 3). The shafts 5 of the two valves 17 and 18 are connected with each other by means known per se and not shown, that make the opening and closing movements of the two valves synchronous. The valve 17 (Figure 2) and the valve 18 have upstream of the spherical bodies 3 respective annular packings 6 supported by mobile seats 7 and held in position by threaded ring nuts 12. The mobile seats 7 are inserted in sliding way into the respective bodies 16 and they are biased to maintain the respective packings 6 against the spherical bodies 3 by Belleville washers 9 placed around hinges 10 inserted in cavities 29 of the respective bodies 16 and supported by threaded ring nuts 11 screwed onto the mobile seats 7. O- Rings 13 provide the water-tightness between said mobile seats 7 and the bodies 16.
The valve 17 (Figure 2) has in addition downstream of the spherical body 3 an additional annular packing 30 supported by a mobile seat 31 and held in position by a threaded ring nut 32. The mobile seat 31 is inserted in sliding way into the body 16 and is biased to maintain the packing 30 against the spherical body 3 by Belleville washers 33 placed around hinges 34 inserted in cavities 36 of the body 16 and supported by a threaded ring nut 37 that is screwed onto the mobile seat 31. During the operation, the fluid, coming from the pipe 21 situated on the right in Figures 1 and 3, enters the nearby channel 24 and meets the cut-off valve 17. If this is in opening position (Figure 3), said fluid continues its flow through the cylindrical duct 4 in order to get then into the fitting part 14. Since the synchronised valves 17-18 are two, the valve 18 will be in opening position too thus allowing the passage of the fluid that finally exits from the fitting 1 and goes into the pipe 21 situated on the left in Figures 1 and 3.
If the valve 17 is closed (Figures 1 and 2), the fluid in pression thrusts the mobile seat 7 in the direction of flow of the same fluid and, helped by the washers 9, causes the packing 6 to tighten against the spherical body 3, withholding the fluid upstream of valve. If because of wear or of difficult operating conditions, there are leakages between the packing 6 and the spherical body 3 with consequent flooding of the chamber 35, the fluid is besides withheld by the second packing 30 that is thrust in turn in watertight conditions against the spherical body 3 by the same fluid and by the washers 33. A greater reliability of the fitting is therefore assured.

Claims

1. Cut-off valve (17) comprising a spherical body (3) passed through by a diametral duct (4) and a first water-tightness packing (6) placed upstream of said spherical body (3) in the direction of flow of the fluid and elastically maintained against said spherical body (3), characterised in that it has a second water-tightness packing (30) placed downstream of said spherical body (3) and elastically maintained against it.
2. Valve according to claim 1, characterised in that said first packing (6) is maintained against the spherical body (3) by a first mobile seat (7) thrust by the fluid in pressure and by elastic means (9).
3. Valve according to claim 1, characterised in that said second packing
(30) is maintained against the spherical body (3) by a second mobile seat
(31) biased by elastic means (33) and by possible fluid in pressure filtered beyond said first packing (6).
4. Valve according to claim 1, characterised in that it is situated in the part upstream, as regards the flow of fluid, of a pipe fitting (1) destined to the transport of oil and chemical fluids.
PCT/EP2004/002835 2003-03-21 2004-03-17 Fluid flow cut-off valve, particularly for pipe fittings destined to the transport of oil and chemical products WO2004083693A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2003A000554 2003-03-21
ITMI20030554 ITMI20030554A1 (en) 2003-03-21 2003-03-21 FLUID FLOW INTERCEPTION VALVE,

Publications (1)

Publication Number Publication Date
WO2004083693A1 true WO2004083693A1 (en) 2004-09-30

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PCT/EP2004/002835 WO2004083693A1 (en) 2003-03-21 2004-03-17 Fluid flow cut-off valve, particularly for pipe fittings destined to the transport of oil and chemical products

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IT (1) ITMI20030554A1 (en)
WO (1) WO2004083693A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2981720A1 (en) * 2011-10-25 2013-04-26 Total Sa ISOLATION TAP

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504885A (en) * 1968-08-12 1970-04-07 Eldon E Hulsey Seat and seal assembly for valves
US4483511A (en) * 1983-05-18 1984-11-20 Kitamura Valve Mfg. Co., Ltd. Valve assembly including elastic seals
EP0153773A2 (en) 1984-02-23 1985-09-04 Giorgio Bormioli Quick-connecting device for pipes
US4844410A (en) * 1988-07-29 1989-07-04 Crosby Valve & Gage Adjustable seat assembly for a valve
US4911408A (en) * 1989-01-03 1990-03-27 Kemp Development Corporation Seat assembly for ball valves
US5927687A (en) * 1996-09-25 1999-07-27 Krause; Ralf Ball valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504885A (en) * 1968-08-12 1970-04-07 Eldon E Hulsey Seat and seal assembly for valves
US4483511A (en) * 1983-05-18 1984-11-20 Kitamura Valve Mfg. Co., Ltd. Valve assembly including elastic seals
EP0153773A2 (en) 1984-02-23 1985-09-04 Giorgio Bormioli Quick-connecting device for pipes
US4844410A (en) * 1988-07-29 1989-07-04 Crosby Valve & Gage Adjustable seat assembly for a valve
US4911408A (en) * 1989-01-03 1990-03-27 Kemp Development Corporation Seat assembly for ball valves
US5927687A (en) * 1996-09-25 1999-07-27 Krause; Ralf Ball valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2981720A1 (en) * 2011-10-25 2013-04-26 Total Sa ISOLATION TAP
WO2013060979A1 (en) * 2011-10-25 2013-05-02 Total Sa Isolating valve
US9140410B2 (en) 2011-10-25 2015-09-22 Total S.A. Isolating valve

Also Published As

Publication number Publication date
ITMI20030554A1 (en) 2004-09-22

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