MXPA98001265A - Ventilation valve of synthetic material to receive - Google Patents

Abstract

The present invention relates to a plastic vent valve for containers for transporting and storing liquids, and adapted to be inserted into a screw cap or a screw cap to close a container opening, the valve has a cylindrical valve housing that comprises a threaded plug for screwing into a corresponding threaded hole in the screw cap or a screw cap, and a valve opening that can be opened and closed by a valve membrane and a splash guard to protect the valve membrane against liquid stored and transported in the container, wherein the cylindrical valve housing has a central hub which is held by ribs, the ribs extend in a star shape, from the hub outwardly to an annular collar and air passage openings formed between the ribs, the elastic valve membrane is constructed and ready to open and close In the air passage openings between the ribs, the valve membrane has a hat profile with a hat profile that opens towards the annular collar of the valve housing and in the closed position supports with an annular edge of the annular collar of the valve. valve housing, the collar forms a valve seat, a counter-wave cap positioned at an inner end of the hub and having an outer edge that forms with an inner end of the valve housing, a peripheral passage groove for the incoming air in the container and which is used to hold the valve membrane to the hub, a wave counter with at least one passage opening for the air inserted between the valve membrane and the anti-surge cap and together with the shock cover form a labyrinth seal to protect the valve membrane against liquid entering the valve housing, and retaining segments on an outer edge of the housing In order to ensure a sealing cap, the outer edge of the annular collar has between the retaining segments, outside passage openings for the air flowing towards the containing through the valve housing, with the valve membrane open

Description

VENTILATION VALVE OF SYNTHETIC MATERIAL FOR CONTAINERS Description of the invention The invention relates to a synthetic vent valve for containers for the transport and storage of liquids, which is integrated in a screw cap or in a screw cap to close the filling opening and / or and / or the ventilation opening for air inlet and / or for air outlet of a container, and having a valve body configured as a screw cap that can be screwed into a corresponding threaded hole of the screw cap or screw cap, and that has a ventilation opening that is opened and closed by a membrane of the valve and a protection for the valve membrane against splashing of the liquid that is transported and stored in the container. German patent document DE 296 08 342.9 Ul discloses a venting valve of the type under consideration, in which the valve membrane is retained in the valve body by means of a gripper disc with air passage openings. which must simultaneously serve to protect the valve membrane against the penetration of liquid from the container to the valve in the case of fluid swings during transport. The practice has shown that the clamping disc fulfills this protective function only in an unsatisfactory manner, because during transport liquid can enter the body of the valve and, due to the effect of suction exerted by the liquid, the membrane of the valve it opens and the liquid exits the container through the vent valve. Another important disadvantage of the known vent valve is that the valve membrane does not have the prescribed pressure resistance for containers for transporting and storing liquids at a container pressure of 1 bar. German patent application DE 25 01 228 A1 discloses a closure cap intended for liquid containers which can be screwed onto the neck of a tap, a cover in which a safety valve acting as an inlet vent valve is integrated. and air outlet, and responds to positive pressure and negative pressure in the container. In this safety valve, a valve disc made of elastic material is used which, when inserted, is strongly prestressed and, as a result, takes the form of a spherical segment. With this valve there is a danger of leakage due to fatigue of the valve disc material with prolonged use. The object of the invention is to develop a ventilation valve of the type under consideration that meets the highest safety requirements. This task is solved according to the invention by a ventilation valve with the features of claim 1. The dependent claims contain advantageous improvements of the invention. The safety valve according to the invention is characterized by a very high operational safety and satisfies the prescribed safety guidelines. The invention is explained below on the basis of the drawings, which represent the following: Fig. 1 a longitudinal section of a vent valve, and Fig. 2 a plan of the valve according to Fig. 1, without sealing cap. The vent valve 1 according to Figs. 1 and 2, made of synthetic material, for tanks, barrels, floor containers and similar containers for the transportation and storage of liquids is constituted by a 2 cylindrical body of the valve configured as screw cap 3, a membrane 4 of the valve, a disk 5 against swell, a cover 6 against swell, and a lid 7 sealant. The threaded plug 3, which is screwed into a threaded cover 8 of synthetic material for, for example, closing the filling opening of the internal plastic container of a parquet container, and in the threaded cap 8 is sealed to the passage of liquids by a sealing ring 9, has a central hub 10 which is supported by ribs 11 that from of the hub 10 extend outwardly in the form of a star to an annular shoulder 12. Support openings 13 are formed between the support ribs 11. The membrane 4 of the valve of elastic configuration for opening and closing the openings 13 for air passage, which is made of a flexible material and resistant against aggressive liquids, such as a synthetic material or rubber with the corresponding additives, is configured as profile 14 of hat and has a central fixing hub 15, reinforced. The membrane 4 of the valve is pushed on the hub 10 to a step 17 thereof, with the opening 16 of the hat profile pointing towards the annular shoulder 12 of the valve body 2. The membrane 4 of the valve is retained on the hub 10 by means of the cover 6 against swelling which is mounted under pressure on the inner end 18 of the hub 10. In the cover 6 against swelling of the swell, a retaining sleeve 20 with ribs 21 is formed. of the retention, which tightens the membrane 4 of the valve with the fixing hub 15 against the step 17 of the hub 10 of the valve body 2, such that in the closed position of the valve 1, the membrane 4 of the The valve rests with an annular rim 22 under prestressing against the inner side 23 of the annular shoulder 12 of the valve body 2 forming a valve seat. The membrane 4 of the valve is additionally retained against an annular projection 25 formed on the inner edge 24 of the annular shoulder 12. The support ribs 11 of the hub 10 have a profile 26 that fits the hat profile 14 of the membrane 4 of the valve, to stop the membrane 4 of the valve during an overpressure in the container, which according to the guidelines of admission should not exceed 1 bar. The outer edge 27 of the swivel cap 6 forms with the inner end 28 of the valve body 2 a peripheral passage gap 29 for the air entering the container with the valve 1 open. Between the membrane 4 of the valve and the cover 6 against waves, the disk 5 is inserted coaxially with respect to the membrane and the cover 5 against swell configured as a hat profile 19 with a central opening 30 for passing air. The wave counter disk 5 forms a labyrinth that protects the membrane 4 of the valve against the liquid that penetrates the valve 1 due to waves. The anti-surge disk 5 is mounted on the body 2 of the valve with the opening 31 of the hat profile pointing towards the membrane 4 of the valve forms a draining surface 32 for the liquid that swells through the valve 1. Likewise the bulge 33 of the cover 6 against swell pointing towards the membrane 4 of the valve forms a draining surface 34 for the liquid which, by swelling, enters the ventilation valve 2. On the external side 35 of the cover 6 against swells, there are formed axial projections 36 with clamping edges 37 adapted to the hat profile 19 of the disk 5 against waves, for pressing the disk 5 against waves against a step 38 on the side 39 inside of valve body 2. On the outer side 40 of the annular shoulder 12 of the valve body 2 is welded a grid 41 of synthetic material covering the air passage openings 13 between the support ribs 11 of the hub 10, as a protection against the penetration of insects. On the outer edge 42 of the body 2 of the valve abutting the annular shoulder 12, hook-shaped retaining teeth 43 are formed for the sealing cap 7 which is to be retained on the valve body 2, between the retaining teeth 43 and the sealing cap 7 projecting outwardly thereon are formed passage openings 44 for the air flowing into the container through the vent valve when the valve membrane 4 is open On the inner side 45 of the sealing cap 7, an annular rib 47 with an undercut 48 is formed at a radial distance from its outer edge 46, which engages with the retaining teeth 43 of the valve body 2 when the valve is clamped. cover 7 sealer on that one. Four segments 49 profiled on the outer side 40 of the annular shoulder 12 serve to be able to insert a cross spanner when screwing or unscrewing the ventilation valve 1, to insert it or remove it from the screw cap 8. If a negative pressure is present in the container when removing liquid, the membrane 4 of the ventilation valve 1 opens, so that the air can flow into the container through the openings 44, 13, 30 and 29 of air passage in the direction of the arrow drawn in Fig. 1.

Reference symbols 1 Vent valve 2 Valve body 3 Screw plug 4 Valve membrane 5 Wave counter 6 Wave cap 7 Sealing cap 8 Threaded cover 9 Seal ring 3 10 2 center hub 11 Support ribs 10 12 Annular shoulder of 2 13 Opening of air passage between 11 14 Profile of hat of 4 15 Closure of 4 4 16 Opening of hat profile of 14 17 Step of 10 18 Inside end of 10 19 Hat profile of 5 20 Fastening sleeve in 6 21 Fastening rib of 20 22 Ring edge of 4 23 Inside side of 12 24 Inside edge of 12 25 Rib in 24 26 hat 11 27 Outside edge 6 28 Inside end 2 29 Step slit between 27 and 28 30 Central step opening 5 31 Hat profile opening 19 32 Runoff surface of 5 33 Overflow of 6 34 Runoff surface of 6 External side of 6 36 Mounting flange in 35 37 Fixing edge of 36 38 Step on 39 39 Internal side of 2 40 External side of 12 41 Grid in 40 42 External edge of 2 43 Retaining tooth in 42 44 Openings of passage between 43 and 7 45 Inner side of 7 46 External edge of 7 47 Annular rib in 45 48 Out of 47 47 Segment profiled in 40

Claims (11)

1. Ventilating valve of synthetic material for containers, for transport and for the storage of liquids, which is integrated in a screw cap or in a screw cap to close the filling and / or emptying opening and / or the ventilation opening for air inlet and / or for air outlet of a container, and having a valve body configured as a screw cap that can be screwed into a corresponding threaded hole of the screw cap or the screw cap, and having an opening of ventilation that opens and closes by means of a membrane of the valve, as well as it has a protection for the membrane of the valve against the splashing of the liquid that is transported and stored in the container, ventilation valve that is characterized by the fact that the cylindrical body of the valve has a central cube supported by ribs that from the cube extend outwards in the form of a star to form r an annular shoulder, wherein air passage openings are formed between the support ribs, in that in addition a membrane of the valve of elastic configuration, to open and close the openings of air passage between the ribs, is It is pushed inside the cube up to a step of the same, being that the membrane of the valve configured as a hat profile is interconstructed in the body of the valve with the opening of the hat profile pointing towards the annular shoulder of the body of the valve and, in the closed position of the valve, rests with an annular edge under pretension against the inner side of the annular shoulder of the valve body forming a valve seat, by the fact that on the inner end of the hub a swage cap is mounted under pressure, the outer edge of which forms, with the inner end of the valve body, a peripheral air gap for the air to flow through netra in the container with the valve open and that simultaneously serves to fix the valve membrane on the hub, due to the fact that between the valve membrane and the anti-surge cap is inserted in the valve body, coaxially with respect to the membrane and the cover, a counter wave with at least one air passage opening, which forms together with the anti-surge cap a labyrinth that protects the valve membrane against the liquid that permeate through the waves in the valve, and by the fact that at the outer edge of the valve body abutting the annular shoulder are formed retaining segments (retention teeth) for a sealing cap that can be imprisoned on the valve body , being between the retaining segments (retention teeth) and the sealing cap that protrudes out on them are formed air passage openings that flows into the container through the vent valve, when the valve membrane is open.

2. Ventilation valve according to claim 1, characterized in that the support ribs of the hub have a profile that adapts to the hat profile of the valve membrane, to stop the membrane of the valve during an overpressure in the container.

3. Vent valve according to claim 2, characterized in that the valve membrane is additionally stopped against an annular projection formed on the inner edge of the annular shoulder of the valve body. Ventilation valve according to one of claims 1 to 3, characterized in that the valve membrane is made of a flexible material and resistant against aggressive liquids, such as a synthetic material or rubber with the additives corresponding, has a central fixing hub, reinforced. 5. Ventilation valve according to one of claims 1 to 4, which is characterized by the fact that a clamping sleeve with axial clamping ribs is formed in the cap against swelling waves, which tightens the valve membrane with the clamping hub against the step of the hub of the body of the valve. valve, and because the bulging of the cover against swell pointing towards the membrane of the valve forms a runoff surface for the liquid that by swell penetrates the ventilation valve 1. 6. Ventilation valve according to one of claims 1 to 5, characterized in that the wave counter has a hat profile with a central passage opening for air. Ventilation valve according to one of Claims 1 to 6, characterized in that external thrust projections are formed on the outer side of the wave cap, distributed around the periphery of the cover. fastening edges adapted to the hat profile of the disk against swell, to tighten the disk against swell against a step on the inner side of the valve body. 8. Ventilation valve according to one of claims 1 to 7, characterized in that the anti-surge disk is mounted on the valve body with the opening of the hat profile pointing towards the membrane of the valve. valve, and forms a runoff surface for the liquid that penetrates the valve through waves. Ventilation valve according to one of claims 1 to 8, characterized in that a grid, preferably made of plastic, placed on the outer side of the annular shoulder of the valve body, covers the openings of the valve. passage of air between the support ribs of the bucket, as protection against the penetration of insects. 10. Ventilation valve according to claim 9, characterized in that the grid is welded to the outer side of the annular shoulder. Ventilation valve according to one of claims 1 to 10, characterized in that retaining teeth in the form of a hook are formed on the outer edge of the valve body to trap the sealing cap by means of which inner side is formed an annular rib with a relief at a radial distance from the outer edge, which is locked with the retention teeth of the valve body to imprison the sealing cap on it.