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EP0464915B1 - Dickstoffpumpenventil - Google Patents

Dickstoffpumpenventil Download PDF

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Publication number
EP0464915B1
EP0464915B1 EP91201600A EP91201600A EP0464915B1 EP 0464915 B1 EP0464915 B1 EP 0464915B1 EP 91201600 A EP91201600 A EP 91201600A EP 91201600 A EP91201600 A EP 91201600A EP 0464915 B1 EP0464915 B1 EP 0464915B1
Authority
EP
European Patent Office
Prior art keywords
valve
contact
sealing ring
valve according
rings
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.)
Expired - Lifetime
Application number
EP91201600A
Other languages
English (en)
French (fr)
Other versions
EP0464915A1 (de
Inventor
Cornelis Johannes De Koning
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.)
Envirotech Pumpsystems Netherlands BV
Original Assignee
Holthuis BV
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 Holthuis BV filed Critical Holthuis BV
Priority to AT91201600T priority Critical patent/ATE97998T1/de
Publication of EP0464915A1 publication Critical patent/EP0464915A1/de
Application granted granted Critical
Publication of EP0464915B1 publication Critical patent/EP0464915B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1087—Valve seats

Definitions

  • Valve for application in a sludge pump system as further outlined in the preambule of claim 1.
  • valves are applied in pumping systems, inter alia in combination with a displacement pump.
  • aggressive, abrasive and corrosive liquids containing granular material, such as sand, coal, ore or, for example, mining waste often at high temperatures, are frequently pumped over large distances under high to very high pressures. It is clear that these conditions place extremely high demands on the durability of such a system's components, among which the valve.
  • a valve such as that mentioned in the preamble is known from Dutch patent application 8600545.
  • the valve described herein is partially provided with a metal to metal contact-surface and partially with a metal to elastic material contact-surface.
  • the metal to elastic material contact-surface is employed to allow sludge material which is present between the contact-surfaces when the valve closes, and, as a result, is under extra-high pressure, to escape via grooves provided in the metal contact-surface, without causing damage to the valve.
  • the object of the current invention is to provide a valve which, under equivalent circumstances, has a longer life and longer maintenance-free periods than the known valve.
  • valve according to the invention has characterising features as outlined in claim 1.
  • the invention makes use of the understanding that the high degree of wear of the elastic material in the known valve can largely be attributed to those particles in the sludge which, due to their presence on the contact-surface between metal and elastic material, remain on the metal part of the contact-surface during the closing of the valve and, thus, are pushed into the elastic material, resulting in heavy damage to it in a short time.
  • the invention offers a solution whereby the aforesaid particles are, on both sides, elastically embedded in the elastic contact-surface between the elastic sealing rings of the valve so that, under the same circumstances, the valve stands far less chance of sustaining damage than was previously the case.
  • valve according to the invention has, thus, also been made suitable for working pressures in the order of 30 - 300 bar.
  • One embodiment of the valve according to the invention is characterised in that the form of the cross-section of the sealing rings and of the supporting elements is chosen in such a way that, when the valve body is moving in the direction of the valve seat, the sealing rings are the first parts to come into contact with each other.
  • the advantage of the embodiment is, besides the two-sided embedding of the sludge particles in the elastic contact-surface during valve closure and the coming together of the sealing rings, that just before closure of the metal supporting elements, the metal contact-surface concerned is cleaned by the sludge as it escapes from between the surfaces.
  • the point of the contact-surface of the sealing rings furthest from the point where the contact-surfaces of the sealing rings and of the supporting elements meet has sufficient freedom to be able to move radially with respect to the motional axis of the valve body.
  • the freedom to execute the aforementioned motion forms a basis for the further notion of making the elastic contact-surface curvilinear, hereby allowing classification according to the technical effects to be discussed below.
  • a curved contact-surface between the elastic sealing rings particularly a contact-surface with a spherical form, whereby a somewhat crooked descent of the valve body, arising, for example, from play in the guiding media, will be very much less likely to result in an incorrect seating, so that wear will not significantly increase.
  • a further advantage pertaining to the incision is that, if the supporting element becomes somewhat worn away by the valve body, the valve body will not, as it were, partially fall between the supporting element and the valve seat. In this way, stair-like wearing-effects on the metal contact-surface are avoided.
  • the figure shows a possible embodiment of a cross-section of a valve 1 which, for example, is used as a suction valve or a delivery valve in, for example, displacement pumps for pumping mixtures consisting of liquid and solid matter. Said pumping usually occurs at under high pressure.
  • the valve 1 has a high-pressure side 2 and a low-pressure side 3.
  • the low-pressure side 3 is that side of the valve 1 where, at least in the case whereby the valve 1 is closed, the pressure is lower than at the high-pressure side 2.
  • the valve 1 is provided with a valve casing, which is not depicted, and a valve body 5 which can move in said valve casing. Attached to the valve body 5 is a valve stem 6 which is mounted in the valve casing in such a way as to be movable in a sleeve 7.
  • the sleeve 7 is attached to the valve casing, which valve casing is not depicted, via securing media 4.
  • valve 1 If the valve 1 is of the self-working type and is moved by the pressure of the medium at the sides 2 and 3, then, in general, a spring 8, located between the valve body 5 and the sleeve 7, will be present in the valve casing. However, if the valve is not of the self-working type, then the movement of the valve body 5 will be effected by way of media which are not depicted and which can be operated from without.
  • valve seat 9 Located in the valve 1 is a valve seat 9 which has an essentially conical contact-surface.
  • the valve body 5 also possesses a corresponding conical contact-surface.
  • the valve body 5 possesses a metal supporting element 10 and the valve seat possesses a metal supporting element 17 in order to form a conically extending metal-to-metal contact-surface 11.
  • An elastic ring 12 is mounted on the valve body 5 and an elastic ring 13 is mounted on the valve seat 9. Both rings 12 and 13 possess corresponding contact-surfaces in order to form the elastic contact-surface 14.
  • the internal diameter and external diameter, respectively, of the rings 12 and 13 are such that, when the valve 1 closes, the rings 12 and 13 first make contact at a point 19 between the contact-surfaces 11 and 14, and only later, when the valve body 5 moves further downwards, can the metal-on-metal contact between the valve seat 9 and the metal element 10 also be effected.
  • the elastic ring 13 in the valve seat gives way vertically and outwardly.
  • the distinct contact-surfaces 11 and 14, which are preferably bordering on each other, have a curved form whereby, for example, one of the contact-surfaces is concave and the other is correspondingly convex, as appears in the figure.
  • the sealing ring 12 is implemented in such a way that its largest diameter is larger than the diameter of the elastic contact-surface 14, whereby, under circumstances of either surface-wearing or deterioration of the elastic properties of, in particular, an uppermost lip section 15 of the the ring 13, a good seal is guaranteed at the surface 14.
  • the largest diameter of the surface 14 is also greater than the largest diameter of an element 16 which encapsulates the ring 12 and is mounted on the valve body 5. This means that, in the event of wear of a bulging section 18 of the ring 12, the diameter will be restored to that of the encapsulating element 16, and no stair-like wear will occur.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Lift Valve (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Sliding Valves (AREA)
  • Check Valves (AREA)

Claims (11)

  1. Ventil für Anwendung in einem Schlammpumpensystem, wobei das genannte Ventil (1) mit einem axial beweglichen Ventilkörper (5) in einer Führung (7) versehen ist, auf dem besagten Ventilkörper (5) sind ein erster elastischer Dichtungsring (12) und ein erstes metallenes unterstützendes Element (10) angebracht, und der besagte Ventilkörper ist mit einem Ventilsitz (9) versehen, dadurch gekennzeichnet, daß auf dem Ventilsitz (9) ein zweiter elastischer Dichtungsring (13) und ein zweites metallenes unterstützendes Element (17) angebracht sind, so angeordnet, daß wenn das Ventil geschlossen ist, der erste Dichtungsring (12) und das erste unterstützende Element des Ventilkörpers (10) nur mit dem Ventilsitz (9) über den zweiten Dichtungsring (13) beziehungsweise das zweite unterstützende Element (7) Kontakt machen.
  2. Ventil nach Anspruch 1, dadurch gekennzeichnet, daß die korrespondierenden Dichtungsringe (12, 13) und unterstützende Elemente (10, 17) miteinander über im wesentlichen konische Kontaktflächen (11, 14) miteinander in Kontakt kommen.
  3. Ventil nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß das Profil des Querschnitts der Dichtungsringe (12, 13) und der unterstützenden Elemente (10, 17) derart gewählt ist, daß wenn der Ventilkörper (5) in Richtung des Ventilsitzes (9) bewegt, zunächst die Dichtungsringe miteinander in Kontakt kommen.
  4. Ventil nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Stelle auf der Kontaktfläche (14) der Dichtungsringe, die der Stelle gegenüber gelegen ist, an der sich die Kontaktflächen der Dichtungsringe (14) und der unterstützenden Elemente (11) berühren, in der Weise frei liegt, daß sie in der Lage ist, eine radial gerichtete Bewegung gegenüber der Längsachse des ventilkörpers zu vollziehen.
  5. Ventil nach einem der Ansprüche 1 bis einschließlich 4, dadurch gekennzeichnet, daß die zwischen den Dichtungsringen (12, 13) gebildete Kontaktfläche (14) gekrümmt ist.
  6. Ventil nach Anspruch 5, dadurch gekennzeichnet, daß die Kontaktfläche (14) der Dichtungsringe in einer derartigen Richtung gekrümmt ist, daß der erste Dichtungsring (12) eine konvexe Fläche hat und der zweite Dichtungsring (13) eine konkave Form hat.
  7. Ventil nach Anspruch 6, dadurch gekennzeichnet, daß der Krümmungsradius des ersten Dichtungsrings (12) anders als der Krümmungsradius des zweiten Dichtungsrings (13) ist.
  8. Ventil nach einem der Ansprüche 1 bis einschließlich 7, dadurch gekennzeichnet, daß der maximale Außendurchmesser des ersten elastischen Dichtungsrings (12) maximal 1,05 mal die Größe des maximalen Außendurchmessers der Kontaktfläche (14) der Dichtungsringe hat.
  9. Ventil nach einem der Ansprüche 1 bis einschließlich 8, dadurch gekennzeichnet, daß der maximale Außendurchmesser des ersten elastischen Dichtungsrings (12) maximal 1,05 mal die Größe des maximalen Durchmessers des mit dem ersten Dichtungsring (12) in Verbindung stehenden einschließenden Elements (16) hat, das an der Hochdruckseite (2) an der Ventilstange (6) befestigt ist.
  10. Ventil nach einem der Ansprüche 1 bis einschließlich 9, dadurch gekennzeichnet,daß in dem metallenen unterstützenden Element (10) im Bereich der Niederdruckseite (3) ein Einschnitt (20) nahe der Kontaktfläche (11) der unterstützenden Elemente vorgesehen ist.
  11. Ventil nach einem der Ansprüche 1 bis einschließlich 10, dadurch gekennzeichnet, daß die vorgenannten Dichtungsringe (12, 13) als lose festgeklemmte Ringe oder als anvulkanisierte Ringe ausgeführt sind.
EP91201600A 1990-06-25 1991-06-24 Dickstoffpumpenventil Expired - Lifetime EP0464915B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91201600T ATE97998T1 (de) 1990-06-25 1991-06-24 Dickstoffpumpenventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9001445 1990-06-25
NL9001445A NL9001445A (nl) 1990-06-25 1990-06-25 Slurriepompklep.

Publications (2)

Publication Number Publication Date
EP0464915A1 EP0464915A1 (de) 1992-01-08
EP0464915B1 true EP0464915B1 (de) 1993-12-01

Family

ID=19857310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91201600A Expired - Lifetime EP0464915B1 (de) 1990-06-25 1991-06-24 Dickstoffpumpenventil

Country Status (5)

Country Link
EP (1) EP0464915B1 (de)
AT (1) ATE97998T1 (de)
CA (1) CA2045322C (de)
DE (1) DE69100709T2 (de)
NL (1) NL9001445A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10670152B2 (en) 2012-04-25 2020-06-02 Bitzer Kuehlmaschinenbau Gmbh Shut-off valve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3115336B1 (fr) * 2020-10-19 2022-10-07 F2M Pompe pour fluide cryogénique
WO2022084072A1 (fr) * 2020-10-19 2022-04-28 F2M Pompe comprenant des moyens de refroidissement
GB2635753A (en) * 2023-11-24 2025-05-28 Weir Minerals Netherlands Bv Valve body

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2300815A (en) * 1930-08-04 1942-11-03 Dudley C Sharp Valve for pumps
US2898082A (en) * 1956-08-09 1959-08-04 Macclatchie Mfg Company High pressure pump valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10670152B2 (en) 2012-04-25 2020-06-02 Bitzer Kuehlmaschinenbau Gmbh Shut-off valve

Also Published As

Publication number Publication date
CA2045322C (en) 2001-09-11
EP0464915A1 (de) 1992-01-08
CA2045322A1 (en) 1991-12-26
NL9001445A (nl) 1992-01-16
ATE97998T1 (de) 1993-12-15
DE69100709T2 (de) 1994-04-21
DE69100709D1 (de) 1994-01-13

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