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WO1993005325A1 - Vanne de purge actionnee par un flotteur - Google Patents

Vanne de purge actionnee par un flotteur Download PDF

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Publication number
WO1993005325A1
WO1993005325A1 PCT/SE1992/000527 SE9200527W WO9305325A1 WO 1993005325 A1 WO1993005325 A1 WO 1993005325A1 SE 9200527 W SE9200527 W SE 9200527W WO 9305325 A1 WO9305325 A1 WO 9305325A1
Authority
WO
WIPO (PCT)
Prior art keywords
float
housing
vent
projection
seal
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.)
Ceased
Application number
PCT/SE1992/000527
Other languages
English (en)
Inventor
Roger Israelsson
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.)
ISRAELSSONS MEKANISKA VERKSTAD AB
Original Assignee
ISRAELSSONS MEKANISKA VERKSTAD AB
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 ISRAELSSONS MEKANISKA VERKSTAD AB filed Critical ISRAELSSONS MEKANISKA VERKSTAD AB
Priority to EP92918681A priority Critical patent/EP0680577A1/fr
Publication of WO1993005325A1 publication Critical patent/WO1993005325A1/fr
Priority to NO940641A priority patent/NO301249B1/no
Priority to FI940920A priority patent/FI102634B/fi
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
    • F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float
    • F16K24/044—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float the float being rigidly connected to the valve element, the assembly of float and valve element following a substantially translational movement when actuated, e.g. also for actuating a pilot valve

Definitions

  • This invention relates to an automatic, float-operated vent or air relief valve of the kind indicated in the preamble of the attached patent claim 1.
  • Vent valves of the kind indicated above are predominantly used in hot water circulation systems for venting air separated from the water of the system.
  • Examples of vent valves of the above indicated, general kind are disclosed for instance in Swedish patents Nos. 208 498 and 221 142, but said valves are not suitable for mounting directly to a radiator, since their design makes them comparatively bulky.
  • said valves must be designed having a relatively large float in order to provide sufficient weight for the float to ensure that it securely opens the valve when necessary, within the entire pressure range for which it is intended. If the float is too light in relation to the pressure in the system the valve may remain closed, so that no venting takes place.
  • the object of the present invention is therefore to provide an automatic vent valve of the kind indicated in the introduction, which is adapted for mounting in association with a radiator and which permits reliable venting of small as well as large quantaties of air without any manual adjustment.
  • Fig. 1 illustrates the vent means according to the invention in a longitudinal section
  • Fig. 2 illustrates a cross-section through the float housing of the vent valve according to Fig. 1, taken along the line II-II in Fig. 1, and
  • Fig. 3 in a partially sectioned side view illustrates the vent valve according to Fig. 1 provided with a protec- tive cover and mounted on a connector.
  • the vent valve 1 consists of a housing 2 which forms a float chamber 3 with a float 4 guided therein, said float being more closely described below. From Fig. 2 it is clear that in the illustrated embodiment the float chamber as well as the float have a cylindrical shape, but it is obvious that other designs permitting a reliable guiding of the float may be employed as well.
  • the float chamber 3 in the housing 2 is delimited upwardly by means of a partition wall 10 provided at a distance below the upper end of the housing 2.
  • a bore 11 is provided, which is preferably provided substantially in the longitudinal central axis of the float chamber 3.
  • a nozzle 12 is mounted in the bore 12 and this nozzle is screwed into the bore 11 so that its lower end projects into the float chamber 3.
  • a channel 13 is extended which in the float chamber opens in a vent orifice 13a.
  • the channel 13 communicates with the interior of the housing on both sides of the partition wall 10 for controlled venting of the float chamber 3.
  • annular, upwardly extending inner wall 14 is provided, and inside this inner wall are provided a number of expanding or hygroscopic washers 15 which are main- tained in position inside the inner wall 14 by means of a plug 16 screwed into the same.
  • the inner wall 14 is also provided with at least one discharge opening for drawing off air and possibly a smaller amount of water to the area outside the sidewall 14.
  • Fig. 1 also illustra- tes that between the outside of the inner wall 14 and the upper portion of the wall 3 of the housing a collecting chamber 21 is formed for collecting a smaller amount of water that may penetrate the expanding washers before they expand and seal.
  • Fig. 2 illustrates that the float 4 has a shape, in this embodi ⁇ ment cylindrical, adapted to the shape of the float chamber 3, whereby the diameter of the float 4 is sufficiently smaller than the inner diameter of the housing 2 to permit air intended to be vented to pass between the float 4 and the inner wall of the housing 3.
  • the float 4 is provided with a number of, in the illustrated embodiment three, guide beads 4a uniformly distri ⁇ minded around its circumference and extended in the direction of movement of the float 4 in the float chamber 3.
  • the guide beads 4a are provided such that their outermost ends are positioned on a circle the diameter of which is only slightly smaller than the diameter of the float chamber 3 in the housing 2.
  • the float 4 At its upper end facing the vent orifice 13a the float 4 is provided with a seal member 18 intended to engage the lower end of the nozzle 12. It is vital for the function of the valve 1 that the seal member 18 is provided with an upper substantially flat seal surface 18a cooperating with the lower end of the nozzle 12 and thus with the vent orifice 13a and, at least in the position of the float 4 in which the seal surface 18a cooperates with the lower end of the nozzle 12, being inclined at an angle relative to the lower end of the nozzle 12.
  • the lower end of the nozzle and thus the vent orifice are positioned in a plane perpendicular to the direction of movement of the float 4, whereby the upper surface 18a of the seal member 18 is inclined at an angle relative to the plane perpendicular to the direction of movement of the float.
  • This angle may be determined from case to case and dependent on the conditions of the valve application, and is also determined in relation to the hardness of the material of the seal member.
  • the seal member is produced in the shape of an at least partially resiliently yieldable sealing peg having a head 18b positioned at the upper end of the float 4.
  • the surface of the head 18b facing away from the float 4 forms the upper seal surface 18a.
  • the sealing peg is also provided with a shaft 18c extended from the opposite surface of the head and being received in a mounting channel 19 opening at the upper surface of the float 4, whereby said channel is inclined relative to the longitudinal axis of the float, for positioning the seal surface 18a in said angular position.
  • the float is preferably solid, whereby the mounting channel 19 consists of a bore produced therein.
  • the bore may be provided having an essentially greater length than that of the shaft 18c of the seal member 18.
  • the seal member is, in this embodiment, manufactured from a resiliently yieldable material, such as rubber, whereby the hardness of the rubber is adapted to the pressure range of the valve such that within the intended pressure range the vent orifice 13a, for reasons clarified below, will never be completely closed by the seal member and that an opening remains which varies dependent on the depression of the lower nozzle end into the seal member, and thus on the pressure.
  • a resiliently yieldable material such as rubber
  • Fig. 3 illustrates an embodiment where the vent valve 1 has been supplemented with a covering cap 20 attached to the bottom piece 5 by means of a snap-in connection and being provided with vent orifices 22 in the upper area of its sidewall.
  • Fig. 3 the vent valve 1 is furthermore illustrated mounted to a connection piece 8 employed when installing the valve 1 in a horizontal opening, such as in a radiator, since the valve in itself has to b mounted vertically due to the fact that it is float-operated.
  • the connection piece 8 is provided with a cut-off member 8a permitting the connection to the radiator to be cut off in the cases when the valve 1 has to be dismounted for exchange or maintenance.
  • vent valve 1 In float-operated valves of this kind the dimensioning of the float is governed by the pressure range within which the valve is intended to operate, i.e. the float must on one hand have sufficient buoyancy or net lift, but must on the other hand have sufficient weight to release the vent orifice when the water level sinks.
  • the vent valve according to the invention is primarily adapted for use at radiators and the like where the working pressures are up to a maximum of 4 bar, which means that a conventional float-operated vent valve intended for this pressure range would be too bulky to be used on the radiator.
  • valve was designed in accordance with known principles but in a smaller dimension, this would mean that in the upper pressure range the float would completely seal the vent orifice and would make venting impossible as long as the pressure reamined at this high level.
  • the vent valve according to the invention serves to collect air from the water in the system in the float chamber 3, above the float. This air collected in the float chamber is continuously vented due to the fact that the vent orifice 13a never becomes completely closed.
  • the vent orifice 13a never becomes completely closed.
  • the inclination of the seal surface 18a of the seal member 18, as suggested according to the invention, does in combination with the resiliency of the seal member result in the advantage that regardless of the pressure existing in the system water can never flow out through the valve at a faster rate than to be safely collected in the collecting chamber 21, before the expanding washers 15 expand and seal against continued escape of water.
  • this is achieved by the fact that up to the maximum allowed pressure the vent orifice 13a will be restricted, through the depression of the nozzle into the seal member 18, directly dependent on the pressure in the system. Above the allowed maximum pressure the vent orifice 13a will on the other hand be completely closed so that no venting occurs anymore.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Float Valves (AREA)

Abstract

L'invention se rapporte à une vanne de purge automatique fonctionnant à l'aide d'un flotteur et spécialement conçue pour se monter directement sur un radiateur ou sur un conduit dans un système de circulation d'eau chaude. Ladite vanne possède un boîtier (2) comportant une chambre à flotteur, au moins une ouverture (6) située dans la partie inférieure du boîtier et conçue pour communiquer avec le système de circulation d'eau chaude, un orifice de purge (13a) situé dans la partie supérieure du boîtier (2) et un flottteur (4) se déplaçant dans la chambre à flotteur (3); ledit flotteur (4) comporte, sur son côté supérieur, un élément d'étanchéité (18) coopérant avec l'orifice de purge situé dans une saillie (12) pénétrant vers le bas à l'intérieur du boîtier du flotteur. D'après l'invention, l'élément d'étanchéité (18) comporte une surface d'étanchéité supérieure pratiquement plate (18a) coopérant avec l'extrémité inférieure de la saillie (12) et, de ce fait, avec l'orifice de purge (13a); de ce fait, la surface d'étanchéité (18a), au moins dans la position du flotteur (4) provoquant la coopération entre la surface d'étanchéité (18a) et l'extrémité inférieure de la saillie (12), est inclinée en fonction d'un angle α par rapport à l'extrémité inférieure de la saillie.
PCT/SE1992/000527 1991-08-28 1992-07-22 Vanne de purge actionnee par un flotteur Ceased WO1993005325A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP92918681A EP0680577A1 (fr) 1991-08-28 1992-07-22 Vanne de purge actionnee par un flotteur
NO940641A NO301249B1 (no) 1991-08-28 1994-02-24 Flottörstyrt utluftningsventil
FI940920A FI102634B (fi) 1991-08-28 1994-02-25 Uimuriohjattu ilmanpoistoventtiili

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9102468-7 1991-08-28
SE9102468A SE468958B (sv) 1991-08-28 1991-08-28 Flottoerstyrd utluftningsventil

Publications (1)

Publication Number Publication Date
WO1993005325A1 true WO1993005325A1 (fr) 1993-03-18

Family

ID=20383560

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1992/000527 Ceased WO1993005325A1 (fr) 1991-08-28 1992-07-22 Vanne de purge actionnee par un flotteur

Country Status (4)

Country Link
EP (1) EP0680577A1 (fr)
FI (1) FI102634B (fr)
SE (1) SE468958B (fr)
WO (1) WO1993005325A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2342578A (en) * 1998-02-19 2000-04-19 Yu Chun Hsia Venting a waterbed

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708944A (en) * 1949-09-15 1955-05-24 Wiscon Products Inc Air relief valve
US4011884A (en) * 1974-02-12 1977-03-15 Mordeki Drori Liquid-level valving device particularly useful as automatic relief valve
DE3221377C1 (de) * 1982-06-05 1983-12-29 Bopp & Reuther Gmbh, 6800 Mannheim Selbsttaetiges Be- und Entlueftungsventil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708944A (en) * 1949-09-15 1955-05-24 Wiscon Products Inc Air relief valve
US4011884A (en) * 1974-02-12 1977-03-15 Mordeki Drori Liquid-level valving device particularly useful as automatic relief valve
DE3221377C1 (de) * 1982-06-05 1983-12-29 Bopp & Reuther Gmbh, 6800 Mannheim Selbsttaetiges Be- und Entlueftungsventil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2342578A (en) * 1998-02-19 2000-04-19 Yu Chun Hsia Venting a waterbed

Also Published As

Publication number Publication date
FI940920A7 (fi) 1994-02-25
SE468958B (sv) 1993-04-19
FI940920A0 (fi) 1994-02-25
EP0680577A1 (fr) 1995-11-08
SE9102468L (sv) 1993-03-01
FI102634B1 (fi) 1999-01-15
SE9102468D0 (sv) 1991-08-28
FI102634B (fi) 1999-01-15

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