WO1993008519A1 - Dispositif de reduction de pression - Google Patents

Dispositif de reduction de pression Download PDF

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Publication number
WO1993008519A1
WO1993008519A1 PCT/NL1992/000189 NL9200189W WO9308519A1 WO 1993008519 A1 WO1993008519 A1 WO 1993008519A1 NL 9200189 W NL9200189 W NL 9200189W WO 9308519 A1 WO9308519 A1 WO 9308519A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
pressure
reducing device
regulating
valve
Prior art date
Application number
PCT/NL1992/000189
Other languages
English (en)
Inventor
Johannes Theodorus Antonius Straver
Original Assignee
Pegas-Eploitatie Mij Nv
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 Pegas-Eploitatie Mij Nv filed Critical Pegas-Eploitatie Mij Nv
Priority to EP92923179A priority Critical patent/EP0647336A1/fr
Publication of WO1993008519A1 publication Critical patent/WO1993008519A1/fr

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2093—Control of fluid pressure characterised by the use of electric means with combination of electric and non-electric auxiliary power
    • G05D16/2095—Control of fluid pressure characterised by the use of electric means with combination of electric and non-electric auxiliary power using membranes within the main valve

Definitions

  • the present invention relates to a reducing device according to the preamble of Claim 1.
  • Such a device is disclosed by German “Auslegeschrift” l,2l4,065.
  • the latter discloses a reducing valve with safety device.
  • Both the pressure-regulating part and the shut-off part are fitted at one side of the housing.
  • the regulating part is fitted further away from the hous ⁇ ing than the shut-off part.
  • Such reducing devices are used in, for example, the "medium pressure" part of distribution networks for natural gas. They generally comprise, a pressure-regulating part, a monitor part and a shut-off part.
  • the pressure-regulating part serves primarily to carry out the pressure-reducing function. If said pressure- regulating part fails, its function is taken over by the monitor part, which is set at a slightly higher pressure.
  • the shut-off part which is set at an even higher pressure, goes into operation. In this case, however, the flow of gas is completely ' blocked. It was usual to place three valves with the corresponding functions in series one after the other. However, this took up a considerable amount of space, which constitutes a problem in particular in towns, where such reducing devices are commonly used. It is important for preventive main ⁇ tenance that such reducing devices should be readily accessible so that the various "soft" parts can be replaced in a simple way. This means that cabinets taking up a relatively large amount of space are always neces ⁇ sary, and in towns safety measures have to be taken to ensure that access by unauthorised people is prevented.
  • this monitor part is fitted between the regulating part and the shut-off part.
  • the design with a sleeve through which the valve spindle which is accommodated in the regulating part extends can be combined in a par ⁇ ticularly advantageous way with a ring diaphragm which provides the pres ⁇ sure regulation of the regulating part.
  • said monitor part is also provided with a sleeve for accommodating there ⁇ in the valve spindle, the sleeve being connected to a diaphragm, and the end of the sleeve functioning as a seat face of a shut-o " ff valve.
  • the seat face interacting therewith is preferably a part of the sleeve of the regulating part described above.
  • the shut-off part preferably comprises a diaphragm-controlled release device for the valve spindle.
  • This release device can be designed with a pressure sleeve which is provided with a constriction and is con ⁇ nected to the valve spindle, and which is accommodated in a rotary sleeve provided with recesses and a number of locking elements disposed between the rotary sleeve and the pressure sleeve.
  • the locking elements can comprise a sleeve provided with grooves and having a thickened edge.
  • the housing of the reducing device can be provided with filter means at the side away from the regulating part.
  • the accommodation in a housing also means that a complete gas station which has such compact dimensions that it can be placed underground is provided, which is important particularly in towns and other densely populated areas.
  • Fig. 1 shows a first embodiment of the device according to the invention, in side view in cross-section
  • Fig. 2 shows- a cross-section along the line II-II from Fig. 1 of the device in the blocked position
  • Fig. 3 shows a cross-section corresponding to Fig. 2, in the open position of the device
  • Fig. shows a further embodiment of the invention.
  • the regulating/monitor/shut-off valve according to the present invention comprises a housing 1, a regulating part 2, a monitor part 3. and a shut-off part 4.
  • the housing 1 is provided with connecting flanges 5 and 6, 5 being the inlet side and 6 the outlet side.
  • Housing 1 contains an inlet bore 7 a d an outlet bore 8, and also a valve assembly consisting of a valve disc 9 with sealing 0-ring 10 and valve seat 11, which is formed by the end of sleeve 12.
  • Valve disc 9 is disposed so that it is slidable between two positions on valve spindle 13. The travel upwards is limited by a spring-loaded ring 14, while the movement downwards is limited by an 0-ring 15.
  • Valve disc 9 i the position shown in Fig. 1 is loaded by spring 16, which at the other side engages on cover 17, which is fixed to housing 1 by means of bolts 18.
  • 0-ring 19 functions to seal the cover relative to the housing.
  • a channel system 20 is accommodated in valve spindle 13- In the down position of the valve disc 9. as shown in the figure, a connection will be made here above and below the valve disc by this channel system 20 because the spring force of the spring-loaded ring 14 is lower than the spring force of spring 16, so that the ring 14 is pressed into the flat position. If, however, as will be explained later, the force of the spring 16 is directed to valve seat 11, and no upward force is exerted on valve spindle 13. i.e.
  • valve spindle 13 will be moved upwards relative to valve disc 9 by spring-loaded ring 14 in such a way that 0-ring 15 pro ⁇ vides for sealing with the valve disc, so that the channel system 20 no longer provides a connection between the top and bottom side of the valve disc.
  • spring action of spring-loaded ring 14 will first be overcome before there is any movement against the force of spring 16. In other words, a connection will first be produced between the top and bottom side of the valve disc, and only then will the valve disc be moved.
  • Sleeve 12 is also provided at the other end with a valve seat 21, which is realized by 0-ring 22.
  • a displaceable sleeve 23 engages on 0-ring 22.
  • Said sleeve 23 forms part of the monitor part 3 of the device according to the invention.
  • the regulating part 2 is provided with a seat ring 24 which is coupled to the sleeve 12 and on which a ring diaphragm 2 engages.
  • the space behind the ring diaphragm 25 is connected by means of line 26 to a regulating unit 27.
  • the outlet pressure of the device is supplied to regulating unit 27 through line 28. It is also possible to supply other variables such as the. inlet pressure of gas to it.
  • sleeve 23 In the normal working position sleeve 23 will be free from 0-ring 22, with the result that the gas can flow through sleeve 22 into chamber 30. Controlled by regulating unit 27, ring diaphragm 25 will rest more or less against seat ring 24 and in this way reduce the pressure of the ingoing gas and bring it to the desired pressure through outlet chamber 31 to outlet bore 8.
  • Chamber 30 is provided with a connection 32 for con- * necting to the regulating unit 27-
  • the monitor part 3 contains the sleeve 23 described above.
  • a bore 33 is present for taking the extension of valve spindle 13, indicated by 34.
  • the valve spindle comprises two separate parts, in order to make simple dismantling possible.
  • Sleeve 23 is, on the one hand, pressed downwards by spring 35. which engages on the top side of a diaphragm box 3 while, on the other hand, an upward directed force can be exerted on the sleeve 23 by the diaphragm 37 which lies in diaphragm box 3 and is connected to said sleeve.
  • Diaphragm box 36 has two chambers separated by diaphragm 37.
  • Bottom chamber 39 is connected by means of line 4l to a monitoring unit 40 which is connected, inter alia, by means of line 3 to the outlet pressure of the device.
  • the outlet pressure is preferably measured downstream of the device by means of the lines 28, 42 and 43, in order to remove any turbulence effects due to the device according to the invention.
  • Monitoring unit 4 ⁇ can also be provided with further control signals, such as the inlet pressure.
  • Monitoring unit 40 is designed in such a way that it controls sleeve 23 so that the pressure of the gas present in chamber 30.
  • shutt-off unit 4 is shown not only in Fig. 1 but also in Figs. 2 and 3- It can be seen in particular from Fig. 2 that it comprises a diaphragm box 45 containing a diaphragm 46. Diaphragm box 45 is divided by diaphragm 46 into chambers 47 and 48. In this case the outlet pressure acts on chamber 47 through line 49, while chamber 48 is connected to atmospheric pressure.
  • U-shaped part 52 is driven to the right in the drawing by means of rod 53 con ⁇ nected to plate 4 under the influence of spring 55•
  • U-shaped part 5 contains a slot 56 in which a stop pin 57 is accommodated in such a way that it has limited movement.
  • Stop pin 57 is connected to a rotary sleeve 58.
  • Sleeve 58 has an essentially cylindrical inner periphery and is pro ⁇ vided with recesses 59 arranged along the periphery.
  • a plastic sleeve 60 with a thickened top edge 61 is provided inside sleeve 58.
  • the plastic sleeve 60 is divided at least at the thickened top edge by the presence of grooves 62. This means that plastic sleeve 60 can be seen as a ring with ball-type elements fixed to the ends by means of fingers.
  • the extended valve spindle 3 is provided with an adjustable pressure pin 65. The latter acts on a pressure sleeve 66 which is provided with a bevelled and narrowed part. The diameter here is such that a thickened top edge 61 of plastic sleeve 60 can be accommodated in the space bounded between the narrowed part and sleeve 58.
  • Pressure sleeve 66 is extended by an indicator rod 67 on which a push button 68 acts.
  • An emergency stop but ⁇ ton 69 and a reset button 70 which can be seen in particular from Figs. 2 and 3. are also present. They act on sleeve 58.
  • the shut-off part described above functions as follows: Starting from the position shown in Figs. 1 and 2, if the pres ⁇ sure at the outlet becomes too high, such excess pressure is communicated by means of line 49 to diaphragm 46. This causes rod 51 to slide to the left, and U-shaped part 2 will also move stop pin 57 to the left. As a result, sleeve 58 moves anticlockwise, as shown in Fig. 2, so that the parts of the thickened top edge 6l of plastic sleeve 60 come to lie in front of the recesses 59- Due to the force of spring 16 exerted by pres ⁇ sure sleeve 66 (by means of valve spindle 13. extended valve spindle 34 and adjustable pressure pin 65) .
  • valve disc 9 in this case moves outwards together with push button 68, so that an indication is given that the device is shut off.
  • means may engage on push button 68 for the purpose of giving an alarm.
  • push button 68 For putting the device into operation again, push button 68 must first be pressed. This exerts a force on valve spindle 13. with the result that a connection is provided at both sides of the valve disc by means of channel system 20.
  • valve disc 9 It is possible in this way to move valve disc 9 downwards, which would otherwise be difficult on account of the pressure difference existing between the inlet pressure and the many times lower outlet pressure.
  • sleeve 8 When there is further movement downwards, sleeve 8 must then be turned by.pressing reset button 70. In this way the thickened top edge 6l is pressed in again from the position shown in Fig. 3. so that the position shown in Figs. 1 and 2 is obtained.
  • sleeve 58 By pres ⁇ sing emergency stop 69 in the position shown in Figs. 1 and 2, sleeve 58 is immediately turned to the position shown in Fig. 3-
  • the presence of slot 5 means that it is not necessary to move the U-shaped part _>2 for this.
  • the device according to the invention is equipped in such a way that the pressure at which shut-off ' part 4 becomes effective is higher than the pressure at which monitor part 3 becomes active, which pressure is in turn higher than the pressure at which the regulating unit 2 func- tions.
  • For simple maintenance bolt construction 72 is present. By loosening this bolt construction it is possible to change the various "soft" parts of the device periodically or as required.
  • the device according to the invention has the advantage that all regulating and monitoring parts are accommodated at only one side of housing 1, which facilitates maintenance and makes compact installation necessary. For maintenance, only loosening of the bolt construction 72 and removal of cover 17 are necessary, following which the device can be dismantled completely.
  • the device shown here is particularly suitable for regulation of the pressure in gas networks, and in particular in the medium pressure range. In other words, the supply pressure lies between 3 an 8 atm, and the inlet pressure can be approximately 200 mm water column.
  • the use of rotary sleeve 8 provides for a particularly low-friction and therefore a sensitive shut-off system.
  • the use of plastic sleeve 60 with thickened top edge 6l eliminates the problem in the prior art of the balls falling off and being lost during maintenance work.
  • Fig. 4 shows a further embodiment of the invention.
  • a different housing 75 is used, but the same parts 2, 3 and 4 are fitted on it. These parts are, however, now surrounded by a housing 76.
  • the housing 75 is designed for the accommodation of a filter housing 77 inside which a filter 78 is disposed. Housing 75 is provided with a down ⁇ ward extension 79 on which a cover 80 is fitted.
  • Spring 16 rests by means of a threaded part 8l on filter housing 77•
  • An only diagrammatically shown inlet valve 82 with operating rod 83 is fitted in the inlet part 7 •
  • the various regulating and monitoring parts are not shown in this drawing and correspond to the construction shown in Figs. 1 and 2.
  • Filter housing 77 is provided with a dust blower 84 at the lower side.
  • Connec ⁇ tion 85 is present for connecting thereto a pressure monitoring device.
  • the device according to Fig. 4 operates in the same way as that of the earlier figures, but there is the possibility of blocking the supply of gas by means of inlet valve 82, while the gas introduced is filtered before it is reduced in pressure.
  • the device according to Fig. 4 forms a complete gas station which can be accommodated without further measures in an existing distribution network.
  • the particularly compact construc ⁇ tion thereof makes it possible to avoid separate housings and similar cabinets, and it is possible to place such a device underground, which can be of considerable importance particularly in cities where there is lack of space.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

Dispositif de réduction de la pression d'un fluide d'entrée. Il comporte un carter (1) auquel est fixée une partie régulatrice de pression (2). Une partie obturatrice (4) est montée du même côté. Ceci facilite l'accès au dispositif de réduction de pression pour les travaux d'entretien. On peut également monter une partie de contrôle entre la partie régulatrice et la partie obturatrice. On obtient ainsi une unité très peu encombrante que l'on peut même installer sous terre.
PCT/NL1992/000189 1991-10-22 1992-10-22 Dispositif de reduction de pression WO1993008519A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92923179A EP0647336A1 (fr) 1991-10-22 1992-10-22 Dispositif de reduction de pression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9101763 1991-10-22
NL9101763A NL9101763A (nl) 1991-10-22 1991-10-22 Reduceerinrichting.

Publications (1)

Publication Number Publication Date
WO1993008519A1 true WO1993008519A1 (fr) 1993-04-29

Family

ID=19859837

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1992/000189 WO1993008519A1 (fr) 1991-10-22 1992-10-22 Dispositif de reduction de pression

Country Status (4)

Country Link
EP (1) EP0647336A1 (fr)
AU (1) AU2922092A (fr)
NL (1) NL9101763A (fr)
WO (1) WO1993008519A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU687235B2 (en) * 1994-09-02 1998-02-19 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Gas control and dispensing assembly and gas storage device comprising such a unit
WO1998043140A1 (fr) * 1997-03-22 1998-10-01 Bg Plc Systeme de regulation de pression

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE536167A (fr) * 1900-01-01
GB911613A (en) * 1959-11-06 1962-11-28 Sir W H Bailey & Company Ltd Improvements in or relating to fluid pressure regulators
DE1214065B (de) * 1964-03-14 1966-04-07 Karlsruhe Augsburg Iweka Membrangesteuertes Druckminderventil mit einer federbelasteten Sicherheits-Absperrvorrichtung
FR2375531A1 (fr) * 1976-12-27 1978-07-21 Regel Messtechnik Gmbh Vanne d'arret de securite, notamment pour installations de reglage de pression de gaz
EP0057581A2 (fr) * 1981-02-02 1982-08-11 Grove Valve And Regulator Company Système et dispositif de contrôle pour une vanne de régulation sensible à la pression

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE536167A (fr) * 1900-01-01
GB911613A (en) * 1959-11-06 1962-11-28 Sir W H Bailey & Company Ltd Improvements in or relating to fluid pressure regulators
DE1214065B (de) * 1964-03-14 1966-04-07 Karlsruhe Augsburg Iweka Membrangesteuertes Druckminderventil mit einer federbelasteten Sicherheits-Absperrvorrichtung
FR2375531A1 (fr) * 1976-12-27 1978-07-21 Regel Messtechnik Gmbh Vanne d'arret de securite, notamment pour installations de reglage de pression de gaz
EP0057581A2 (fr) * 1981-02-02 1982-08-11 Grove Valve And Regulator Company Système et dispositif de contrôle pour une vanne de régulation sensible à la pression

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU687235B2 (en) * 1994-09-02 1998-02-19 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Gas control and dispensing assembly and gas storage device comprising such a unit
WO1998043140A1 (fr) * 1997-03-22 1998-10-01 Bg Plc Systeme de regulation de pression

Also Published As

Publication number Publication date
EP0647336A1 (fr) 1995-04-12
NL9101763A (nl) 1993-05-17
AU2922092A (en) 1993-05-21

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