Abstract:
There is a close part rotating or reciprocating linearly between the upriver flow passage and the downriver flow passage in a valve. A sub passage mechanism is mounted in the upriver flow passage, which is arranged in a row or more rows along the motion direction of the close part. The sub passage mechanism divides the upriver flow passage into two or more sub passages. When the close part rotates or reciprocates linearly, the upriver surface will open or close respectively all of the sub passages in the valve.
Abstract:
Dispositif de perte de charge, et/ou de fermeture et d'étanchéité d'un circuit fluide, à cartouche interne (3a), (3b), (3c), (3d), (3e) ou (3f) et tube mobile (5). Le dispositif objet de l'invention permet de créer une perte de charge singulière variable sur une conduite mais permet aussi, éventuellement, de fermer et d'étanchéifier cette conduite qui peut être de gros diamètre, en haute pression et en haute température. En effet, l'invention permet, par le mouvement d'un tube mobile (5), d'obturer plus ou moins des ouvertures de passage (6a) ou (6b) du fluide transporté dans la conduite. Ce tube mobile (5) peut éventuellement créer une étanchéité autoclave sur un siège de fermeture (4) en fin de course. Le couple nécessaire à la manœuvre du dispositif est très faible tout au long de la course. Le montage et la maintenance sont simplifiés par l'emploi d'une cartouche amovible (3a), (3b), (3c), (3d), (3e) ou (3f) immergée dans le fluide contenant la quasi-totalité des organes nécessaires au fonctionnement du dispositif. Il fonctionne sur tous les types de fluides.
Abstract:
A noise-attenuating module 210 of a valve trim 200, including: a first divider plate 212; a second divider plate; and a plurality of flow segment plates 220, 240 and 260 disposed adjacent to and in contact with one another. At least one Herschel-Quincke tube flow path 227 is formed by interconnected openings in the flow segment plates. A noise-attenuating cartridge 400 to be placed transverse to the path of flowing fluid, the cartridge having: a plurality of flow segment plates 410, 420, 430, 440 and 450 disposed adjacent to and in contact with one another. At least one Herschel-Quincke tube is formed by interconnected openings in the flow segment plates. A noise-attenuating cartridge 500 to be placed transverse to the path of flowing fluid, the cartridge including a segmented disk 510 having at least two lateral mating faces with at least one Herschel-Quincke tube 513 milled into at least one of the lateral faces.
Abstract:
A trim insert for a choke assembly is disclosed, wherein the trim insert is a tubular member with a substantially constant inner diameter. A first end of the device is positioned within an adjacent upstream sleeve and a second end is sealingly retained within the discharge channel of the choke assembly. A flange coaxially retains the tubular member between the sleeve and a shoulder of the choke body. The trim insert is made of an erosion resistant material, such as tungsten carbide, hardened steel, or a ceramic. Additionally, the inner surface of the tubular member may be coated with a hardening compound to provide additional erosion resistance.
Abstract:
A process for manufacturing a valve trim assembly. The process comprises providing a flow disk (20A) having an outer diameter (21), an inner diameter (25), and an outer disposable flow disk portion (23), providing a separation disk (20B) having an outer diameter (22) and an inner diameter (26), wherein the flow disk (20A) outer diameter is greater than the separation disk (20B) outer diameter (22), stacking the flow disk (20A) on the separation disk (20B), and removing the outer disposable flow disk portion creating a reduced flow disk outer diameter.
Abstract:
A seal assembly (12) is adapted for use in a valve (10) having a trim cage (22) with an inner surface extending along an axis and a plug (32) sized to fit inside the trim cage inner surface, wherein the plug is adapted to move along the axis. The seal assembly includes a spring-loaded seal (42) ring disposed between the plug (3) and the trim cage inner surface, the seal ring including a center spring (44) member and a jacket (46) formed of a fluoropolymer resin to tightly seal between the plug and the trim cage inner surface. A first wiper (54) ring is disposed between the plug and the trim cage inner surface and positioned axially upstream of the seal ring, and a second wiper (56) ring is disposed between the plug and the trim cage inner surface and positioned axially downstream of the seal ring. Each of the first and second wiper rings has an outside surface sized to engage the trim cage inner surface and is formed of a material sufficiently rigid to scrape foreign material from the bore surface yet sufficiently soft to minimize damage to the bore.
Abstract:
An excess pressure relief system for a tank (10) carried on a vehicle, which includes a relief valve (11) for relieving excess pressure in the tank (10); and a diffuser (12) provided on a discharge line (11a) downstream of the relief valve (11).
Abstract:
Bei einer Dämpfungsdüsenanordnung für hydraulisches Druckmittel ist ein Düsenkörper in einem Druckmittelkanal angeordnet. Der Düsenkörper ist mit einer von einer Stirnseite ausgehenden axialen Bohrung versehen, die den Düsenkörper nicht vollständig durchdringt. Der Düsenkörper ist zusätzlich mit einer radialen Bohrung versehen, die die axiale Bohrung mit einem zwischen dem Düsenkörper und dem Druckmittelkanal gebildeten Ringraum verbindet. Zwischen dem Ringraum und dem Druckmittelkanal sind zwei Düsen mit rechteckförmigern Querschnitt angeordnet, die die Drosselwirkung der Dämpfungsdüsenanordnung bestimmen. Es ist eine Dämpfungsdüsenanordnung angegeben, die auch bei grosser Drosselwirkung einfach herzustellen ist. Anstelle der beiden Düsen mit rechteckförmigem Querschnitt sind der Aussendurchmesser des Düsenkörpers und der Innendurchmesser des ihn umgebenden Druckmittelkanals so dimensioniert, dass zwischen dem Düsenkörper und dem Druckmittelkanal ein in axialer Richtung begrenzter Ringspalt gebildet ist. Der Düsenkörper ist dabei fest in dem Druckmittelkanal gehalten. Derartige Düsenanordnungen werden zum Dämpfen von zum Schwingen neigenden hydraulischen systemen eingesetzt.
Abstract:
Flow enhancing restrictors (50") are located within a fluid conduit to provide pressure reduction and flow enhancement. The restrictors may be used in combination with a conventional choke valve or as a stand-alone pressure reduction means. Alternative exemplary embodiments for flow enhancers are described. Each of the flow enhancers has a generally cylindrical base (60) with at least one fluid passage (64) disposed therethrough. Each of the flow enhancers also provides a dome (64) that projects upwardly from the center of the base to assist in directing fluid flow and receiving the abrasive forces associated with the fluid.
Abstract:
A fluid pressure reduction device with tortuous flow paths in stacked disks. The fluid flow outlets are maintained independent by directed flow paths to avoid flow collisions in the exiting flow streams. A flow straightening section includes an inwardly tapered end section (56) at the fluid flow outlets (54a, 54b). Splitting of a tortuous flow path (46) into at least two sub-flow paths with balancing of the mass flow between the sub-flow paths.