WO1991003671A1 - Systeme etanche pour soupape a double etancheite - Google Patents

Systeme etanche pour soupape a double etancheite Download PDF

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Publication number
WO1991003671A1
WO1991003671A1 PCT/EP1990/000961 EP9000961W WO9103671A1 WO 1991003671 A1 WO1991003671 A1 WO 1991003671A1 EP 9000961 W EP9000961 W EP 9000961W WO 9103671 A1 WO9103671 A1 WO 9103671A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
valve
seal
arrangement according
parts
Prior art date
Application number
PCT/EP1990/000961
Other languages
German (de)
English (en)
Inventor
Hans Otto Mieth
Original Assignee
Otto Tuchenhagen Gmbh & Co. Kg
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 Otto Tuchenhagen Gmbh & Co. Kg filed Critical Otto Tuchenhagen Gmbh & Co. Kg
Publication of WO1991003671A1 publication Critical patent/WO1991003671A1/fr

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Classifications

    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/243—Packings
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given

Definitions

  • the invention relates to a sealing arrangement for a
  • Double-sealing valve which seals two spaces against each other in series with two gasket bodies, between or in which a valve part is movably arranged, the gasket bodies interacting on the one hand with the jacket surface of the valve part and on the other hand with valve housing parts and thereby the overflow of fluids from one room to the other prevent others, and wherein an annular space surrounding the valve part is provided between the sealing bodies and is connected to the surroundings of the valve via at least one connecting path.
  • a sealing arrangement of the genre identified in the introduction, which has sealing bodies with a circular cross section, is known from EP 0 279 177.
  • the body of the seal can be flushed with cleaning fluid from the rooms on both sides of the contact surfaces, except for their temporary contact surfaces on the sealing points with the valve part on the one hand and the valve housing on the other hand. This is achieved in the known arrangement in that everyone
  • Sealing body is bordered in each case on its side facing the space to be sealed by a liquid-permeable boundary wall, and in addition that each sealing body has limited mobility in the direction of the movement of the valve part.
  • a disadvantage of the known sealing arrangement is the fact that the sealing body, although equipped with limited axial mobility, is still embedded in a groove. Depending on the position of the sealing body in relation to the groove flanks bordering it, the principle is not always ensured that, in particular, the area of the sealing body on the product space can be completely flushed with cleaning agent. Although the groove flanks on the product room side are designed to be liquid-permeable, their liquid-impermeable sections can, under certain circumstances, develop a so-called shadow effect in relation to the sealing body.
  • the advantages of the sealing arrangement according to the invention are, in particular, that the one-piece design of the seal as a result of the connecting parts between the sealing bodies makes it possible to dispense with positive engagement of the sealing bodies by means of sealing grooves.
  • the seal is fixed within the valve housing parts or on the valve part in that the projecting support parts engage in a positive manner in the gaps between the connecting parts of the seal.
  • the sealing bodies are completely freely accessible from the product spaces within the housing parts, so that their areas on the product space side can be rinsed with cleaning liquid completely without cleaning shadows.
  • the cantilevered support parts on the one hand ensure that the seal is fixed in the position necessary for the valve, on the other hand, they form a support in the axial direction for the sealing bodies, which are acted upon by product pressure and / or switching forces.
  • the star-shaped design of the support parts on a support ring which is either clamped between the valve housing parts or in the valve part, allows the sealing arrangement according to the invention to be implemented in a particularly advantageous and simple manner.
  • the connecting parts of the seal can be passed individually or in multiple arrangement through the recesses provided between the support parts. With this embodiment, for example, it is readily possible to integrate the sealing arrangement according to the invention within valve housings which have hitherto been designed to accommodate seat plates
  • Locking members served without significantly changing these valve housings.
  • an advantageous embodiment of the sealing arrangement according to the invention provides that the supporting parts engage with a limited axial play between the sealing bodies of the seal.
  • the formation of the support parts on a support ring enables a relatively simple and advantageous guidance and distribution of the cleaning agent from the vicinity of the valve to the critical areas of the sealing body.
  • This is achieved according to another advantageous development of the support ring in that it forms an inlet chamber or an outlet chamber on its upper side and on its underside with the respectively adjacent part, and that the inlet chamber has at least one inlet channel and the outlet chamber has at least one outlet channel with the Annular space are connected, which is located between the sealing bodies.
  • an advantageous embodiment provides that the inlet channel opens in the lower region of the annular space and the outlet channel opens in the upper region of the annular space.
  • the space between the sealing bodies is inevitably divided into the first annular space already mentioned above and into a second annular space, which is located on the sides of the sealing body facing away from the first annular space, by their support on the supporting parts. So that this second annular space and the areas of the sealing bodies that partially delimit it can also be cleaned properly, cleaning agent is supplied to it in a secondary flow to the main flow supplying the first annular space.
  • the second annular space is connected on the one hand to the inlet chamber via at least one inlet opening and on the other hand is connected to the outlet chamber in the region of the recesses which delimit adjacent supporting parts.
  • a particularly simple and easy-to-clean seal results, as is provided by a further embodiment of the seal arrangement according to the invention, if the undeformed seal bodies each have a circular cross section.
  • the wiping and sealing effect of the seal can be improved according to a further embodiment of the sealing arrangement according to the invention in that the undeformed sealing bodies are limited by conical outer surfaces which each form a sealing edge in the area of the sealing points.
  • a further embodiment of the sealing arrangement according to the invention provides that the undeformed sealing bodies are limited by conical outer surfaces, two of which form a sealing edge on the side of the valve part when the seal is supported on the valve body and two on the side of the valve housing part when the valve part is supported so that the body of the seal in the installed state of the seal as a result of prestressing is pressed over the entire surface of the valve housing part or on the valve part on which the seal is supported, and that they rest on the valve part or valve housing part with the sealing edge.
  • the full surface pressure of the seal as a result of pretension in its installation position gives it sufficient stability.
  • the entire surface of the sealing body is attached to the valve housing, while the sealing edges contact the valve part on the inside. If, on the other hand, the seal is supported on the valve part, the entire surface of the seal is supported here, while on the other hand the sealing edge of the sealing body is in engagement with the corresponding valve housing part.
  • the support surface of the seal can now be rinsed with cleaning fluid in that one of the sealing edges is disengaged by partial stroke movement of the valve, so that the sealing body is partially relieved of the previously effective pretension and thereby partially regresses its conical surface area corresponding to the support surface Formation of a wedge-shaped gap springs back.
  • the cleaning liquid can now penetrate into this gap. As soon as the complete closed position of the valve is restored, the full preload rests on the sealing body in question, so that it is supported again over the entire surface.
  • a partial reduction of the preload on both sealing bodies is also possible in that, for example, when the
  • both sealing edges are disengaged and thus both sealing bodies spring back elastically from their contact surface, forming a wedge-shaped gap.
  • the sealing body has on its side facing away from the connecting part a cantilevered sealing part which is supported on the valve body or valve housing side at a distance from the sealing point on torsion of the sealing body in its cross-sectional plane. Forces in the direction of the support parts on the sealing body predominate in the
  • a further embodiment of the seal arrangement according to the invention provides to provide the seal with a reinforcement which extends through the connecting parts and over the circumference of the sealing body, the reinforcing parts in the region of the sealing body permitting a change which differs from the shape of their circular ring.
  • the deformability of the seal in relation to its circular ring shape is necessary, for example, so that when a self-supporting ring is formed on its star-shaped support parts when mounting the valve or when it becomes necessary to replace it, it can be easily attached.
  • FIG. 1 in a spatial representation of a support ring
  • Fig. 2 is a plan view shown in half on the
  • Fig. 3 is an enlarged view of the support ring according to
  • Fig. 4 shows a first cross section through the invention
  • FIG. 5 shows a second cross section through the sealing arrangement of FIG. 4 in accordance with a section profile identified by C - D in FIG. 3;
  • Fig. 6 shows a third cross section through the sealing arrangement of Fig. 4 according to a section in Fig. 3 marked E-F and
  • Fig. 7 shows a cross section through another embodiment of the sealing body of the seal according to the invention with a profiled valve part in the area of the sealing points.
  • FIG. 1 shows a support ring 3 which, according to its intended purpose, is clamped between the valve housing parts 1 and 2 (cf. FIG. 4) and on the inside of which support parts 3a are arranged in a star shape. Adjacent support parts are limited by recesses 3b.
  • an inlet chamber 3c On its upper side there is an inlet chamber 3c and on its underside an outlet chamber 3d, which can only be seen in the area of the recesses 3b, is incorporated (also compare, for example, FIG. 4). From Figure 2 it can be seen how the connecting parts 6c of the seal 6 engage in the recesses 3b of the support ring 3. For the purpose of simplification, the representation of the inlet chamber 3c has been omitted in this plan view. The seal 6 was cut in the area of its support on the support ring 3. The cut off upper part is therefore not shown.
  • FIG. 3 Details of the support ring 3 in the area of the detergent supply and discharge can be seen from an enlarged illustration in FIG. 3. It can be seen that the inlet chamber 3c via an inlet channel 3e (see also the relevant area in the spatial representation according to FIG. 1) with the inside of the support ring, which in connection with a valve part 4 (compare FIG. 4) a first annular space 7 forms, is connected. Likewise forms a drain channel 3f a connection between the inside of the support ring 3 and the outlet chamber 3d formed on its underside.
  • the inlet channel 3e opens tangentially in the lower region of the first annular space 7, and the outlet channel 3f opens tangentially in the upper region of the first annular space 7.
  • a secondary stream flows from the inlet chamber 3c via an inlet opening 3g into a second annular space 10, as can be seen, for example, from FIG. 6.
  • several inlet channels 3e can be arranged over the circumference of the support ring 3. This applies in the same way to the drain channel 3f.
  • I and I 'in FIGS. 1 and 3 indicate the entry into the inlet channel 3e, while the respective exit is designated II or II'.
  • the designation III designates the entry into the outlet channel 3f
  • the designation IV designates its exit into the outlet chamber 3d.
  • V the secondary flow is identified, which reaches the second annular space 10 via the inlet opening 3g from the inlet chamber 3c.
  • a - B, C - D and E - F denote sections through the support ring 3 and its adjacent components, the illustration of which leads to FIGS. 4, 5 and 6.
  • FIG. 4 shows the one labeled A - B in FIG. 3
  • Sectional course which is laid so that it leads through the inlet channel 3e.
  • the illustration further shows how the support parts 3a engage between the sealing bodies 6a and 6b of the seal 6 and thereby form an overlay for the latter in the axial direction.
  • the sealing bodies 6a and 6b are arranged in series, the sealing body 6a on the one hand with the lateral surface of the valve part 4 and on the other hand with a Valve housing part 1 cooperates while the sealing body 6b is located between the valve part 4 and a valve housing part 2.
  • valve part 4 Between the sealing bodies 6a, 6b there is an annular space enclosing the valve part 4, which is subdivided into a first annular space 7 and a second annular space 10 in the area of the contact surfaces by the interaction of the seal 6 and the supporting part 3a.
  • this forms, with the adjacent valve housing part 1, the inlet chamber 3c, which in the exemplary embodiment shown is enlarged by an upper annular space 1c additionally formed in the valve housing part 1.
  • the outlet chamber 3d provided on the underside of the support ring 3 is enlarged via a lower annular space 2c arranged in the valve housing part 2.
  • the annular space, formed from the inlet chamber 3c and the upper annular space 1c, is connected to the surroundings of the valve via an inlet pipe 8.
  • Cleaning agent can be introduced via this inlet pipe 8, distributed over the annular space 1c, 3c and in the
  • a first housing flange 1b is arranged on the valve housing part 1 in the region of the support ring 3 and a second housing flange 2b is arranged on the valve housing part 2 in the corresponding region, between which a housing seal 11 is located.
  • the latter represents sure that no cleaning agent from the area of the support ring 3 can get into the vicinity of the valve.
  • the exemplary embodiments shown have the valve housing parts 1 and 2 with a first housing bore 1 a and a second housing bore 2 a.
  • the first and the second sealing bodies 6a and 6b together with the corresponding housing bore 1a and 2a form the sealing point on the housing side marked X * and Y * in FIG. 5.
  • the part provided with the designation 5 in FIGS. 4 and 5 is an annular closure part with an internal passage, which in a valve, as is known from EP 0 279 177, the valve part 4 in different positions than in the closed position the valve is substituted in the same way as in the closed position.
  • the closure part 5 assumes the same position as the valve part 4 with respect to the seal 6. Its effect on the seal 6 is basically the same.
  • FIG. 6 shows the section course E-F, which leads exactly through a connecting part 6c in the region of the recess 3b. From this illustration it is clear that the first and second sealing bodies 6a and 6b together with the connecting parts 6c, which extend over the circumference of the
  • this illustration shows how the second annular space 10, the part of which is arranged on the top of the support ring 3 in the secondary flow, on the one hand, via at least one inlet opening 3g is connected to the inlet chamber 3c (cf. FIG. 4), on the other hand is connected to the outlet chamber 3d in the area of the recesses 3b.
  • the lower part of the second annular space 10 is cut on the one hand through the outlet chamber 3d and on the other hand through the lower annular space 2c, so that the re nigu ng smi tt el from the entire second annular space 10 can be completely discharged and passed on via the drain pipe 9.
  • each sealing body 6a, 6b of the seal 6, in the exemplary embodiment according to FIGS. 4 to 6, each have a circular cross section
  • a seal 6 is shown in FIG. 7, the undeformed sealing bodies 6a, 6b of which are delimited by conical outer surfaces which are in the area of the sealing points X, X *, Y, Y * each form a sealing edge.
  • each sealing body 6a or 6b has on its side facing away from the connecting part 6c a cantilevered sealing part 6d which, when the
  • Sealing body 6a, 6b in its cross-sectional plane either on the valve part or valve housing side at a distance from the
  • the twisted position of the sealing body is marked with 6a or 6b, with the underlying, twisted sealing body 6b is supported on the valve housing side via a support point Z within the second housing bore 2a.
  • the valve part 4 moved by the switching movement relative to the seal 6 is raised in each case in the sealing point area X, Y determined by the closed position of the valve, with one elevation 4a continuously decreasing on both sides.
  • Seal prestress can also be achieved in that either one or the other sealing edge of the seal 6 is exposed by partial stroke movement of the valve part, or that both seal bodies 6a, 6b are relieved by a full stroke movement into the open position of the valve.
  • the seal 6 In the fully open position of the valve, the seal 6 is from Relieved of any prestress so that a continuous gap exists between it and the housing bore 1a, 2a, if this is intended.
  • the seal 6 can thus be freely flushed with cleaning agent; nevertheless, it is properly fixed in position since, according to the invention, the support parts 3a into the
  • the seal 6 according to the invention can be reinforced regardless of the cross-sectional configuration of the sealing bodies 6a, 6b. This reinforcement is not shown in the exemplary embodiments shown. It extends through the connecting parts 6c and over the circumference of the sealing bodies 6a, 6b, the reinforcing parts in the region of the sealing bodies 6a, 6b permitting a change which differs from the shape of their circular ring.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

L'invention décrit un système étanche pour soupape à double étanchéité, en ce qu'il est entre autres indispensable dans ce genre de système d'étanchéité que les corps d'étanchéité, particulièrement leurs zones en contact avec le compartiment du produit, puissent être lavés avec un liquide de nettoyage de façon plus complète qu'avec les méthodes offertes par la technique actuelle. Pour ce faire, on prévoit que le premier et le deuxième corps d'étanchéité (6a et 6b) forment une garniture d'étanchéité d'une seule pièce (6) avec les pièces de liaison (6c) disposées dans le périmètre des corps d'étanchéité et les reliant l'un à l'autre, et que soient disposés des éléments de soutien (3a) formant saillie et pénétrant, d'une part, dans les orifices situés entre les pièces de liaison de la garniture d'étanchéité et formant ainsi support pour les corps d'étanchéité en direction axiale, et d'autre part, s'appuyant soit côté carter de soupape soit côté partie de soupape.
PCT/EP1990/000961 1989-09-05 1990-06-18 Systeme etanche pour soupape a double etancheite WO1991003671A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3929431.5 1989-09-05
DE19893929431 DE3929431A1 (de) 1989-09-05 1989-09-05 Dichtungsanordnug fuer ein doppeltdichtendes ventil

Publications (1)

Publication Number Publication Date
WO1991003671A1 true WO1991003671A1 (fr) 1991-03-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/000961 WO1991003671A1 (fr) 1989-09-05 1990-06-18 Systeme etanche pour soupape a double etancheite

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AU (1) AU5929690A (fr)
DE (1) DE3929431A1 (fr)
WO (1) WO1991003671A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0836041A1 (fr) * 1996-10-09 1998-04-15 Hydrair Limited Dispositif de réglage du débit defluides sensitives au sollicitation au cisaillement

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2815552A1 (de) * 1977-04-14 1978-10-19 Joerg Dipl Ing Lilljeqvist Vorrichtung an armaturen, wie ventilen und schiebern

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701027A1 (de) * 1987-01-16 1988-07-28 Hans Otto Mieth Verfahren und vorrichtung zur steuerung eines leckageraumes eines ventils

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2815552A1 (de) * 1977-04-14 1978-10-19 Joerg Dipl Ing Lilljeqvist Vorrichtung an armaturen, wie ventilen und schiebern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0836041A1 (fr) * 1996-10-09 1998-04-15 Hydrair Limited Dispositif de réglage du débit defluides sensitives au sollicitation au cisaillement

Also Published As

Publication number Publication date
AU5929690A (en) 1991-04-08
DE3929431C2 (fr) 1991-10-24
DE3929431A1 (de) 1991-03-21

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