EP0464915B1 - Clapet de pompe de liquides chargés - Google Patents

Clapet de pompe de liquides chargés 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
German (de)
English (en)
Other versions
EP0464915A1 (fr
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/fr
Application granted granted Critical
Publication of EP0464915B1 publication Critical patent/EP0464915B1/fr
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)
  • Sliding Valves (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Check Valves (AREA)

Claims (11)

  1. Clapet de pompe de liquides chargés, ledit clapet (1) étant pourvu d'un corps de clapet (5) axialement mobile dans un guidage (7), sur ledit corps de clapet une première bague d'étoupage élastique (12) et un premier élément de support métallique (10) étant fixés et ledit corps de clapet étant pourvu d'un siège de clapet (9), caractérisé en ce qu'il est fixé sur le siège de clapet (9) une seconde bague d'étoupage élastique (13) et un second élément de support métallique (17), placés de manière que lorsque le clapet est fermé, la première bague d'étoupage (12) et le premier élément de support (10) du corps de clapet ne sont en contact avec le siège de clapet (9) que par respectivement la seconde bague d'étoupage (13) et le second élément de support (17).
  2. Clapet selon la revendication 1, caractérisé en ce que les bagues d'étoupage (12, 13) et les éléments de support (10, 17) correspondants entrent en contact les uns avec les autres le long de surfaces de contact (11, 14) essentiellement conoïdes.
  3. Clapet selon l'une quelconque des revendications 1 et 2, caractérisé en ce que le profil du diamètre des bagues d'étoupage (12, 13) et des éléments de support (10, 17) est choisi de manière que lors du mouvement du corps de clapet (5) dans la direction du siège de clapet (9), se sont tout d'abord les bagues d'étoupage qui entrent en contact l'une avec l'autre.
  4. Clapet selon l'une quelconque des revendications 2 ou 3, caractérisé en ce que le point sur la surface de contact (14) des bagues d'étoupage opposé au point où les surfaces de contact des bagues d'étoupage (14) et des éléments de support (11) sont en contact, est en position libre de manière à pouvoir suffisamment réaliser un mouvement radial par rapport à l'axe longitudinal du corps de clapet.
  5. Clapet selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la surface de contact (14) formée entre les bagues d'étoupage (12, 13) est courbée.
  6. Clapet selon la revendication 5, caractérisé en ce que la surface de contact (14) des bagues d'étoupage est courbée dans une telle direction que la première bague d'étoupage (12) présente une surface concave et que la seconde bague d'étoupage (13) présente une surface convexe.
  7. Clapet selon la revendication 6, caractérisé en ce que le rayon de courbure de la première bague d'étoupage (12) est inégal au rayon de courbure de la seconde bague d'étoupage (13).
  8. Clapet selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le diamètre extérieur maximal de la première bague d'étoupage élastique (12) est au plus 1,05 fois plus grand que le diamètre maximal de la surface de contact (14) des bagues d'étoupage.
  9. Clapet selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le diamètre extérieur maximal de la première bague d'étoupage (12) est au plus 1,05 fois plus grand que le diamètre maximal de l'élément renfermant (16), lié à la première bague d'étoupage (12) et monté sur la manche de clapet (6) du côté de haute pression (2).
  10. Clapet selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'une entaille (20) est réalisée dans l'élément de support métallique (10) du côté de basse pression (3), près la surface de contact (11) des éléments de support.
  11. Clapet selon l'une quelconque des revendications 1 à 10, caractérisé en ce que lesdites bagues d'étoupage (12, 13) sont réalisées respectivement comme des bagues séparées étant ensuite serrées ou des bagues vulcanisées.
EP91201600A 1990-06-25 1991-06-24 Clapet de pompe de liquides chargés Expired - Lifetime EP0464915B1 (fr)

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 (fr) 1992-01-08
EP0464915B1 true EP0464915B1 (fr) 1993-12-01

Family

ID=19857310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91201600A Expired - Lifetime EP0464915B1 (fr) 1990-06-25 1991-06-24 Clapet de pompe de liquides chargés

Country Status (5)

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

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 (2)

* 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
US20230383742A1 (en) * 2020-10-19 2023-11-30 F2M Pump comprising cooling means

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

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