WO2013174716A1 - Système de commande de fluide pour un joint d'étanchéité gonflable - Google Patents

Système de commande de fluide pour un joint d'étanchéité gonflable Download PDF

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Publication number
WO2013174716A1
WO2013174716A1 PCT/EP2013/060162 EP2013060162W WO2013174716A1 WO 2013174716 A1 WO2013174716 A1 WO 2013174716A1 EP 2013060162 W EP2013060162 W EP 2013060162W WO 2013174716 A1 WO2013174716 A1 WO 2013174716A1
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WO
WIPO (PCT)
Prior art keywords
fluid
pressure
port
inflatable seal
fixed volume
Prior art date
Application number
PCT/EP2013/060162
Other languages
English (en)
Inventor
Othmar Rymann
Marko JORDAN
Original Assignee
Norgren Gmbh
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 Norgren Gmbh filed Critical Norgren Gmbh
Publication of WO2013174716A1 publication Critical patent/WO2013174716A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/28—Controlling escape of air or dust from containers or receptacles during filling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
    • B65B39/02—Expansible or contractible nozzles, funnels, or guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/068—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam with valves for gradually putting pneumatic systems under pressure
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
    • F15B2211/8855—Compressible fluids, e.g. specific to pneumatics

Definitions

  • the embodiments described below relate to, inflatable seals, and more particularly, to a fluid control system for an inflatable seal.
  • Inflatable seals are widely known and have been used in a variety of industries. Typically, inflatable seals are utilized in situations where the seal between the two components is required in an intermittent or repeatable manner.
  • One example is in the bulk material packaging industry. When filling packaging from a bulk container or bag, the bulk container's nozzle is directed into the packaging container and the bulk material is allowed to flow into the packaging container. This process can be high speed and can accommodate large volumes and thus, has received success for numerous industries.
  • a problem with this system is that the bulk materials are often in the form of powders, or granules, or other small sized components and thus, filling of the packaging container can result in a substantial production of dust. If there is no seal present, the dust can contaminate the working environment, which may be unpleasant or dangerous to nearby workers.
  • the nozzle or the packaging can include a sealing member. While harder seals such as solid rubber O-rings could be used, these are generally undesirable because the seal between the bulk container's nozzle and the packaging is continuously broken and then resealed with the next packaging. Therefore, in some systems, an inflatable seal can be provided, which forms a seal between the nozzle and the packaging when inflated. When the inflatable seal is deflated, a gap is created between the nozzle and the packaging so the packaging can be easily removed and closed or sent on for further processing.
  • the pressure supplied to the inflatable sealing member should be relatively fast without overshooting the desired inflation pressure.
  • the pressure supply typically needs to be at a much higher pressure than the desired fill pressure.
  • the desired fill pressure for the inflatable seal had been around 0.2 bar (2.9 psi).
  • the inflatable seal is generally designed to seal dust and the bulk material, which is typically around atmospheric pressure; thus, a stronger seal is not required. It should be appreciated that higher pressures can be provided if necessary.
  • a fast inflation is generally desired and thus, in the past, a two phase inflation system had been implemented.
  • a pressurized fluid source at around 6 bar (87 psi) was used in combination with a first pressure regulator to initially start filling the inflatable seal.
  • air was used as the pressurized fluid.
  • the first pressure regulator typically delivered the pressurized air at a first pressure, which was higher than the final desired inflation pressure of the inflatable seal.
  • the system switched over to a second pressure regulator that provided pressure at a second lower pressure, which was often equal to the final desired inflation pressure of the inflatable seal. This method requires precise valve control and often over or under shoots the targeted inflation pressure.
  • the embodiments described below overcome these and other problems and an advance in the art is achieved.
  • the embodiments described below incorporate a fixed volume container that can be pressurized to a first pressure. Subsequently, the fixed volume container is brought into fluid communication with the inflatable seal to pressurize the inflatable seal to a desired final pressure.
  • a fluid control system comprises a housing including a fluid inlet port configured to be fluidly coupled to a pressurized fluid source and a fluid outlet port configured to be fluidly coupled to an inflatable seal.
  • the fluid control system further comprises a fixed volume container and an inflation control valve.
  • the inflation control valve includes a first fluid port in fluid communication with the fluid inlet port of the housing.
  • the inflation control valve further includes a second fluid port in fluid communication with the fixed volume container and selectively in fluid communication with the first fluid port and a third fluid port selectively in fluid communication with the second fluid port and in fluid communication with the fluid outlet port of the housing.
  • a method for controlling a pressure provided to an inflatable seal is provided according to an embodiment.
  • the pressure is provided to the inflatable seal with a fluid control system fluidly coupled to a pressurized fluid source and to the inflatable seal.
  • the method comprises steps of actuating an inflation control valve to a first position and pressurizing a fixed volume container.
  • the method further comprises steps of actuating the inflation control valve to a second position and pressurizing the inflatable seal using pressure from the fixed volume container.
  • a fluid control system comprises:
  • a housing including a fluid inlet port configured to be fluidly coupled to a pressurized fluid source and a fluid outlet port configured to be fluidly coupled to an inflatable seal;
  • an inflation control valve including:
  • a third fluid port selectively in fluid communication with the second fluid port and in fluid communication with the fluid outlet port of the housing.
  • the fluid control system further comprises a pressure regulator positioned between the pressurized fluid source and the inflation control valve.
  • the fluid control system further comprises a safety valve positioned between the third fluid port and the inflatable seal.
  • the fluid control system further comprises a pressure supply system positioned between the fluid inlet port and the pressurized fluid source and configured to selectively supply pressurized fluid to the inflation control valve through a pressure regulator selected from one or more pressure regulators.
  • the pressure supply system comprises a regulator selection valve comprising:
  • a second fluid port in fluid communication with a first pressure regulator and selectively in fluid communication with the first fluid port
  • a third fluid port in fluid communication with a second pressure regulator and selectively in fluid communication with the first fluid port.
  • a fluid communication path between the fixed volume container and the inflatable seal comprises a substantially constant volume.
  • a method for controlling a pressure provided to an inflatable seal with a fluid control system fluidly coupled to a pressurized fluid source and to the inflatable seal comprises steps of:
  • the step of pressurizing the fixed volume container comprises positioning a pressure regulator between the pressurized fluid source and the fixed volume container and adjusting the pressure regulator to output the first pressure.
  • the step of pressurizing the fixed volume container comprises:
  • the method further comprises a step of actuating the regulator selection valve to a second position to supply pressurized fluid to the fixed volume container through a second pressure regulator and the regulator selection valve.
  • the method further comprises a step of exhausting pressurized fluid from the inflatable seal through a safety valve if the second pressure exceeds a threshold pressure.
  • the method further comprises a step of actuating the inflation control valve to a second position to exhaust the inflatable seal and re-pressurize the fixed volume container.
  • FIG. la shows a filling system with a deflated seal according to an embodiment.
  • FIG. lb shows the filling system with an inflated seal according to an embodiment.
  • FIG. 2a shows the filling system with a deflated seal according to another embodiment.
  • FIG. 2b shows the filling system with an inflated seal according to another embodiment.
  • FIG. 3 shows a fluid control system according to an embodiment.
  • FIG. 4 shows a schematic of the fluid control system according to an embodiment.
  • FIG. 5 shows a pressure curve of the inflatable seal's pressure according to an embodiment.
  • FIG. 6 shows the fluid control system according to another embodiment.
  • FIG. 7 shows a schematic of the fluid control system according to another embodiment.
  • FIGS, l a - 7 and the following description depict specific examples to teach those skilled in the art how to make and use the best mode of embodiments of a control system for an inflatable seal.
  • some conventional aspects have been simplified or omitted.
  • Those skilled in the art will appreciate variations from these examples that fall within the scope of the present description.
  • Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the control system. As a result, the embodiments described below are not limited to the specific examples described below, but only by the claims and their equivalents.
  • FIG. la shows a portion of a filling system 100 according to an embodiment.
  • the filling system 100 can be used to transfer bulk materials, or some other type of material.
  • the material may comprise a liquid, a gas, a solid, or a combination thereof.
  • the material comprises a solid that may be in the form of a powder, granules, pills, etc. that can create a significant amount of dust as it is being transferred between containers.
  • the filling system 100 comprises a bulk container 101 (only a portion of the bulk container 101 is shown).
  • the bulk container 101 includes a nozzle 102.
  • an inflatable seal 103 can be provided and may be coupled to the nozzle 102.
  • the inflatable seal 103 may comprise an inflatable hose, an inflatable O-ring, an inflatable plate, etc.
  • the inflatable seal 103 is in the form of an inflatable doughnut shaped hose and is coupled to an outer surface of the nozzle 102.
  • the inflatable seal 103 will include one or more ports (not shown) to receive/exhaust a pressurized fluid in order to inflate/deflate.
  • the inflatable seal 103 is deflated.
  • a gap 104 exists between the outer surface of the inflatable seal 103 and an inner surface of the packaging 105.
  • the packaging 105 may comprise a rigid structure, such as metal, a keg, a jar, etc. or alternatively may comprise a flexible structure, such as a bag (plastic bag or paper bag). In some embodiments, the packaging 105 may comprise a rigid outer shell that can receive a flexible removable liner.
  • FIG. lb shows the filling system 100 according to another embodiment.
  • the inflatable seal 103 has been inflated.
  • the gap 104 between the nozzle 102 and the packaging 105 is substantially eliminated.
  • the material 106 can be supplied from the bulk container 101 to the packaging 105.
  • the material 106 is provided to the packaging due to gravity and thus, the area of the packaging 105 near the nozzle 102 may remain relatively close to atmospheric pressure.
  • the inflatable seal 103 can be deflated and the packaging 105 can be separated from the nozzle 102.
  • the nozzle 102 is shown being positioned within the packaging 105 in FIGS, la & lb, in other embodiments, the nozzle 102 may comprise a larger diameter than the packaging 105. In this situation, the inflatable seal 103 may be positioned on the inner surface of the nozzle 102. When the inflatable seal is inflated, a seal is created between the inner surface of the nozzle 102 and the outer surface of the packaging 105.
  • FIGS. 2a & 2b show the filling system 100 according to another embodiment.
  • the embodiment shown in FIG. 2a is similar to the previously shown embodiments; however, in FIGS. 2a & 2b the inflatable seal 103 is coupled to the packaging 105 rather than the nozzle 102.
  • This configuration may be utilized in situations where the packaging 105 is reusable and receives a removable liner (not shown), for example.
  • the removable liner can be inserted into the packaging and inside the inflatable seal 103. Therefore, when the seal 103 is inflated, the liner can be caught between the seal 103 and the nozzle 102.
  • the inflatable seal 103 may be coupled to either component that is to be sealed.
  • FIG. 3 shows a fluid control system 300 according to an embodiment.
  • the fluid control system 300 can be utilized to ensure proper inflation and deflation of the inflatable seal 103.
  • the fluid control system 300 will control the flow of a gas, such as air.
  • the fluid control system 300 should not be limited to gases as some applications may require a liquid.
  • the fluid control system 300 can include a housing 301 , a fluid inlet port 302, and a fluid outlet port 303.
  • the fluid inlet port 302 can be configured to be fluidly coupled to a pressurized fluid source 402 (See FIG. 4).
  • the fluid outlet port 303 can be configured to be fluidly coupled to and in fluid communication with the inflatable seal 103.
  • a pressure regulator 304 Also shown in FIG. 3 are a pressure regulator 304, a safety valve 305, an exhaust 306, an inlet pressure gauge 307, and an outlet pressure gauge 308.
  • FIG. 4 shows a schematic of a fluid control system 300 according to an embodiment.
  • the fluid control system 300 can be in fluid communication with a pressurized fluid source 402.
  • the particular pressure of the pressurized fluid source 402 may vary from one application to another; however, in many applications, the pressurized fluid source 402 is at a pressure of around 6-8 bar (87- 1 16 psi).
  • the pressurized fluid source 402 can be fluidly coupled to the pressure regulator 304 via the fluid inlet port 302.
  • the pressure regulator 304 can reduce the first inlet pressure to a second lower pressure.
  • the pressure regulator 304 can reduce the pressure from the 6-8 bar (87- 1 16 psi) inlet pressure to approximately 2-8 bar (29-1 16 psi).
  • downstream from the pressure regulator 304 is an inflation control valve 409.
  • the inflation control valve 409 comprises a 5/2-way valve.
  • other configurations, such as a 3/3-way valve, are possible.
  • the inflation control valve 409 comprises a first fluid port 409a that is in fluid communication with the pressure regulator 304 via the fluid line 410 and is selectively in fluid communication with a second fluid port 409b.
  • the second fluid port 409b is in fluid communication with a fixed volume container 412 via the fluid line 41 1.
  • the inflation control valve 409 further comprises a third fluid port 409c, which is in fluid communication with the safety valve 305, the second pressure gauge 308, and the inflatable seal 103 via the fluid outlet port 303.
  • the third fluid port 409c is also selectively in fluid communication with either the second fluid port 409b or a fourth fluid port 409d.
  • the fourth fluid port 409d is in fluid communication with the exhaust 306 and is selectively in fluid communication with the third fluid port 409c or a fifth fluid port 409e, which comprises a vent.
  • the inflation control valve 409 can be biased to a first position.
  • the inflation control valve 409 is biased to the first position with a biasing member 413.
  • the inflation control valve 409 may need to be actively biased to the first position using a solenoid or pilot pressure, for example.
  • the first fluid port 409a is brought into fluid communication with the second fluid port 409b and the third fluid port 409c is brought into fluid communication with the fourth fluid port 409d. Consequently, in the first position, the inflation control valve 409 provides a fluid communication path between the pressure regulator 304 and the fixed volume container 412 while the inflatable seal 103 is exhausted.
  • the inflation control valve 409 is left in the first position for a threshold amount of time, the pressure within the fixed volume container 412 will reach a first pressure, which will be approximately equal to the pressure output by the pressure regulator 304.
  • the inflation control valve 409 can be actuated to a second position to inflate the inflatable seal 103.
  • Actuation of the inflation control valve 409 to the second position may be performed according to any of the well-known methods, such as a pilot pressure, a solenoid, a pushbutton, etc.
  • the particular method for actuating the inflation control valve 409 is not important for the present embodiment and should in no way limit the scope of the present embodiment.
  • actuation of the inflation control valve 409 is performed using the pressure from the pressurized fluid source 402 via a control valve 415.
  • control valve 415 comprises a solenoid controlled valve and comprises a default closed position where fluid from the pressurized fluid source 402 does not act to actuate the inflation control valve 409.
  • the branch 416 off from the fluid inlet port 302 may be positioned inside or outside of the housing 301.
  • the fluid controlled by the control valve 415 may comprise a separate pressurized fluid source.
  • the inflation control valve 409 is actuated to the second position, the second fluid port 409b is brought into fluid communication with the third fluid port 409c.
  • the fixed volume container 412 is brought into fluid communication with the inflatable seal 103.
  • the pressure within the fixed volume container 412 can therefore be used to inflate the inflatable seal 103.
  • the volumes of the fixed volume container 412, the fluid line 41 1 , the fluid pathway within the inflation control valve 409, and the fluid outlet port 303 are easily determined. Further, the volume of the inflated seal 103 at a desired pressure can be easily determined. Consequently, the final desired inflation pressure of the inflatable seal 103 can be controlled by adjusting the pressure regulated to the fixed volume container 412. This is because upon actuating the inflation control valve 409 to the second position, the pressure within the fixed volume container 412, the inflatable seal 103, and the fluid connections mentioned above will equilibrate to reach a second pressure.
  • the second pressure will be lower than the first pressure because the same amount of fluid expands to a larger volume and can be configured to comprise the desired inflation pressure of the inflatable seal 103. Because the inflation control valve 409 ensures that this total volume is closed off from more fluid being introduced, the total amount of fluid is constant. Therefore, using the fixed volume container 412, the precise amount of fluid can be stored and then rapidly provided to the inflatable seal 103 without concern of overshooting the desired pressure and rupturing the inflatable seal 103.
  • the desired pressure supplied to the fixed volume container 412 can be determined according to equation (1).
  • Pj is the desired pressure supplied to the fixed volume container 412
  • V ! is the volume of the fixed volume container (and the fluid line 41 1);
  • V 2 is the volume of the inflatable seal 103 (and the fluid lines between the inflation control valve 409 and the inflatable seal 103;
  • P x is the desired inflation pressure of the inflatable seal 103. Therefore, as those skilled in the art will understand, once P x is determined by the user/operator, equation (1) can be solved for Pj and the pressure regulator 304 can be set to output the desired P] pressure.
  • the safety valve 305 can be provided, which can release pressure that exceeds the desired inflation pressure. This can prevent the inflatable seal 103 from bursting if the pressure regulator 304 was initially set to a higher pressure than was required.
  • the pressure gauge 308 can be provided so that a user/operator can monitor the pressure within the inflatable seal 103 and ensure that the proper inflation pressure of the inflatable seal 103 has been reached.
  • the fluid control system 300 has a number of advantages over the prior art systems. Because fluid is provided to the inflatable seal 103 from a fixed volume container 412, the inflation control valve 409 does not have to be switched off after a predetermined amount of time or after a predetermined pressure is measured. Rather, for the entire time the inflatable seal 103 is inflated, the inflation control valve 409 can simply remain in the second position. Additionally, because the initial pressure of the fixed volume container 412 is higher than the final inflatable pressure, the inflation can occur much faster than if the pressure regulator 304 were set to the final inflation pressure and coupled directly to the inflatable seal 103. Advantageously, the fluid control system 300 of the present embodiment improves the speed and precision of inflation of the inflatable seal 103.
  • FIG. 5 shows a graph of the inflation pressure of the inflatable seal 103 according to a few different control methods.
  • the graph shows the inflation pressure as a function of time.
  • the line 501 if the pressurized fluid source 402 were coupled directly to the inflatable seal 103, a user/operator would have to close the valve connecting the pressure after a predetermined amount of time to avoid overshooting the desired final inflation pressure. Without shutting the valve quickly, the inflation pressure of the inflatable seal 103 would rise to whatever pressure the pressurized fluid source 402 is at and the inflatable seal 103 would likely burst.
  • FIG. 5 shows a graph of the inflation pressure of the inflatable seal 103 according to a few different control methods.
  • the graph shows the inflation pressure as a function of time.
  • the line 501 if the pressurized fluid source 402 were coupled directly to the inflatable seal 103, a user/operator would have to close the valve connecting the pressure after a predetermined amount of time to avoid overshooting the desired final inflation pressure. Without shutting
  • the pressurized fluid source 402 is assumed to be at approximately 6 bar (87 psi) with the desired inflation pressure of the inflatable seal 103 at approximately 0.2 bar (29 psi).
  • these are merely exemplary pressures and other pressures may be used.
  • the line 502 is the pressure curve generated by inflating the inflatable seal 103 using a pressurized fluid source at the final inflation pressure. Therefore, the pressurized fluid source 402 in this example would be at approximately 0.2 bar (29 psi). As can be seen, the inflation requires an excessive amount of time before reaching the desired inflation pressure at time t 2 . This excessive time results in increased downtime, which can be costly and inconvenient.
  • the line 503 which comprises the pressure curve generated using the fluid control system 300 of the present embodiment.
  • the pressure reaches the desired inflation pressure at time t which is much faster than the pressure curve 502 without overshooting the desired pressure as the pressure curve 501. Therefore, it should be appreciated that the fluid control system 300 of the present embodiment can provide a much faster and more precise pressure control and fluid delivery to the inflatable seal 103 than available in the prior art.
  • the inflation control valve 409 can be actuated back to the first position.
  • the third fluid port 409c will be brought into fluid communication with the fourth fluid port 409d thereby exhausting the inflatable seal 103.
  • the first fluid port 409a is brought back into fluid communication with the second fluid port 409b to once again refill the fixed volume container 412.
  • the fluid control system 300 uses the pressure regulator 304 to adjust the pressure supplied to the fixed volume container 412.
  • the pressure supplied to the fixed volume container 412 may be controlled remotely.
  • the pressure supplied to the fluid control system 300 may be delivered directly to the fixed volume container 412. This embodiment is depicted in FIGS. 6 & 7.
  • FIG. 6 shows the fluid control system 300 according to another embodiment.
  • the fluid control system 300 shown in FIG. 6 looks similar to the previously shown embodiment; however, the pressure regulator 304 has been replaced with a control cartridge 604.
  • the control cartridge 604 in some embodiments can simply fit within the space previously occupied by the pressure regulator 304.
  • the control cartridge 604 can provide a fluid passage from the fluid inlet port 302 directly to the inflation control valve 409. Therefore, in embodiments where the pressure supplied to the fluid control system 300 is controlled remotely, the control cartridge 604 can replace the pressure regulator 304 and the remaining components of the fluid control system 300 can remain the same.
  • FIG. 7 shows a schematic of the fluid control system 300 shown in FIG. 6.
  • the pressure supplied to the fluid control system 300 may be reduced externally. This may allow the fluid control system 300 to be used with inflatable seals of various sizes that require various different pressures. Therefore, in FIG. 7, the fluid control system 300 further comprises a pressure supply system 700.
  • the pressure supply system 700 is coupled to the fluid inlet port 302. The pressure supply system 700 can be positioned within the fluid path between the fluid inlet port 302 and the pressurized fluid source 402.
  • the pressure supply system 700 may be used to remotely control the pressure supplied to the fixed volume container 412.
  • the pressure supply system 700 comprises a regulator selection valve 701.
  • the regulator selection valve 701 can selectively provide fluid communication between the inflation control valve 409 and one or more pressure regulators 703, 704.
  • the pressure supply system 700 comprises two pressure regulators 703, 704. However, in other embodiments more than two pressure regulators may be provided. With two pressure regulators 703, 704, the pressure supply system 700 can accommodate two different sized inflatable seals, which require two different inflation pressures.
  • the regulator selection valve 701 comprises a first fluid port 701a in fluid communication with the inflation control valve 409 via the fluid inlet port 302 and the fluid cartridge 604.
  • the first fluid port 701a is also selectively in fluid communication with a second fluid port 701b.
  • the second fluid port 701b is in fluid communication with the first pressure regulator 703 via a fluid line 705.
  • the regulator selection valve 701 further comprises a third fluid port 701c, which is in fluid communication with the second pressure regulator 704 via a fluid line 706.
  • the third fluid port 701c is also selectively in fluid communication with the first fluid port 701a.
  • the regulator selection valve 701 further comprises a fourth and a fifth fluid port 70 Id, 70 le, which are both closed off.
  • a user/operator can actuate the regulator selection valve 701 to supply the fluid control system 300 with a desired fluid pressure. For example, if a first pressure is desired, the regulator selection valve 701 can be actuated to the first position to selectively provide a fluid communication path between the first fluid port 701 a and the second fluid port 701b. This results in the fluid from the pressurized fluid source 402 flowing through the first pressure regulator 703 and being delivered to the fluid inlet port 302 via the regulator selection valve 701.
  • the inflation control valve 409 can receive the pressurized fluid through the control cartridge 604 and operate in a manner similar to that described above and shown in FIG. 4.
  • the regulator selection valve 701 can be actuated to a second position.
  • the regulator selection valve 701 may be actuated to the second position to accommodate a different inflatable seal for example.
  • the third fluid port 701c is brought into fluid communication with the first fluid port 701 a and the flow from the first pressure regulator 703 is closed off and the pressure flowing through the second pressure regulator 704 is provided to the fluid control system 300.
  • the pressure supply system 700 can be used to remotely change the pressure supplied to the inflation control valve 409 and thus, to the fixed volume container 412. Therefore, a user/operator does not have to manually adjust the pressure regulator 304 as would be the case in the embodiment shown in FIG. 4.
  • the embodiments described above provide a faster and more accurate system for controlling the inflation/deflation of an inflatable seal.
  • the fluid control system 300 described above can rapidly increase the inflation pressure of an inflatable seal without concern of overshooting the desired pressure.
  • the fluid control system 300 can be remotely controlled to accommodate inflatable seals requiring different pressures.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Architecture (AREA)
  • Sealing Devices (AREA)

Abstract

L'invention porte sur un système de commande de fluide (300). Le système de commande de fluide (300) comprend un boîtier (301) avec un orifice d'entrée de fluide (302) configuré de façon à être couplé vis-à-vis des fluides à une source de fluide sous pression (402) et un orifice de sortie de fluide (303) configuré de façon à être couplé vis-à-vis des fluides à un joint d'étanchéité gonflable (103). Le système de commande de fluide (300) comprend de plus un récipient à volume fixe (412) et une vanne de commande de gonflage (409). La vanne de commande de gonflage (409) comprend un premier orifice de fluide (409a) en communication vis-à-vis des fluides avec l'orifice d'entrée de fluide (302) du boîtier (301). La vanne de commande de gonflage (409) comprend de plus un deuxième orifice de fluide (409b) en communication vis-à-vis des fluides avec le récipient à volume fixe (412), et en communication de façon sélective vis-à-vis des fluides avec le premier orifice de fluide (409a) et un troisième orifice de fluide (409c) en communication de façon sélective vis-à-vis des fluides avec le deuxième orifice de fluide (409b) et en communication vis-à-vis des fluides avec l'orifice de sortie de fluide (303) du boîtier (301).
PCT/EP2013/060162 2012-05-24 2013-05-16 Système de commande de fluide pour un joint d'étanchéité gonflable WO2013174716A1 (fr)

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US61/651,098 2012-05-24

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Cited By (4)

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US10612677B2 (en) 2017-02-13 2020-04-07 Goodrich Corporation Solenoid valve for inflation system
US10612723B2 (en) 2017-02-13 2020-04-07 Goodrich Corporation Solenoid valve for inflation system
DE102019103979A1 (de) * 2019-02-18 2020-07-09 Voith Patent Gmbh Wasserkraftmaschine mit einer Wellen-Stillstands-Dichtung und Verfahren zur Dichtigkeitsprüfung
US11712710B2 (en) * 2018-08-02 2023-08-01 Tokyo Electron Limited Substrate processing apparatus and substrate processing method

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GB794442A (en) * 1955-07-07 1958-05-07 Bakelite Ltd Improvements in or relating to pneumatic sealing devices for container filling apparatus
US5052451A (en) * 1991-02-26 1991-10-01 Mallinckrodt Specialty Chemicals Company Dust control apparatus
US20070033932A1 (en) * 2005-08-09 2007-02-15 Campbell Hausfeld/Scott Fetzer Company Apparatus for use with pneumatic device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB794442A (en) * 1955-07-07 1958-05-07 Bakelite Ltd Improvements in or relating to pneumatic sealing devices for container filling apparatus
US5052451A (en) * 1991-02-26 1991-10-01 Mallinckrodt Specialty Chemicals Company Dust control apparatus
US20070033932A1 (en) * 2005-08-09 2007-02-15 Campbell Hausfeld/Scott Fetzer Company Apparatus for use with pneumatic device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10612677B2 (en) 2017-02-13 2020-04-07 Goodrich Corporation Solenoid valve for inflation system
US10612723B2 (en) 2017-02-13 2020-04-07 Goodrich Corporation Solenoid valve for inflation system
US11092252B2 (en) 2017-02-13 2021-08-17 Goodrich Corporation Solenoid valve for inflation system
US11712710B2 (en) * 2018-08-02 2023-08-01 Tokyo Electron Limited Substrate processing apparatus and substrate processing method
DE102019103979A1 (de) * 2019-02-18 2020-07-09 Voith Patent Gmbh Wasserkraftmaschine mit einer Wellen-Stillstands-Dichtung und Verfahren zur Dichtigkeitsprüfung

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