UA122909C2 - Valve structure for a pet keg - Google Patents

Abstract

The invention relates to closure structures for containers made of polyethylene terephthalate and intended for dispensing, storing and transporting pressurised drinks (PET keg). The present valve structure for a PET keg comprises: a cap that has a central opening, with means for connection to a neck of the keg; a hollow rod; a valve element; a spring; and a ring nut, wherein the first end of the rod is open and the second end is closed and has an annular projection, at least one aperture is formed in the generatrix of the rod, the valve clement is mounted upon said rod and able to be displaced along same, the central opening of said clement comprises an annular shoulder capable of interacting with the annular projection of the rod, and an annular projection on the outer surface is capable of interacting with said valve element, and the spring is disposed between the valve element and the ring nut. The cap is mushroom-shaped and is connected to the ring nut by means of a threaded joint, allowing said valve structure to be mounted directly onto the neck, wherein apertures are formed in the bottom part of said ring nut for the passage of gas, and a gasket ring is disposed between the rim and the cylindrical surface of the stem of the mushroom-shaped cap for the purpose of hermetically sealing the connection between cap and neck, said valve element being capable of performing the function of a safety valve and operation indicator and being made of a polymer material with a Shore hardness of 40-60 units. The invention provides for high reliability and air-tightness of the valve structure while performing the function of a safety valve in the event of the excess pressure inside the PET keg exceeding a maximum permissible limit.

Description

The invention ensures high reliability and tightness of the valve structure, while performing the function of a safety valve in case of excessive pressure inside the PET keg exceeding the maximum permissible. pk x x WE ARE NOT

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The field of technology

The invention relates to sealing structures for vessels made of polyethylene terephthalate (hereinafter referred to as Pet-kegs), which are installed on the necks of Pet-kegs for filling, storing and transporting beverages in PET containers under pressure.

Prior art

Pet-kegs with valve structures installed on them are used for storing and bottling drinks, for example, such as beer. These valve structures have several channels that ensure the passage of liquid and gas. During filling, when the Pet-Keg is normally in an upside-down state, the beverage is introduced through the first channel of the valve structure, while the gas squeezed out of the keg exits through the second channel. During bottling, gas (nitrogen or carbon dioxide) is introduced into the Pet-keg through the first channel, in order to force the beverage out of the Pet-keg through the second channel. The beverage is poured using the pouring head, which is attached to the valve structure, on the spring-loaded elements of the valve structure, with the subsequent opening of channels, one of which is intended for the supply of inert gas under excessive pressure, and the second channel is for filling the drink, which is squeezed out by gas. The sealing element of the valve structure serves to keep the generated excessive pressure inside the Pet-keg in case of disconnection (disassembly) of the filling head. As a rule, in the case of pouring and storing beer, the excess pressure is about 2.5-3.0 bar.

The pressure shown is the working pressure of the Pet-keg. At the same time, the Pet-keg can withstand a pressure of approximately 7-8 bar.

In case of violation of the technical conditions of production, storage and operation of Pet-kegs filled with drink, it is possible to increase the excessive pressure in the PET kez above the maximum permissible, which may ultimately lead to the rupture of the Pet-keg. This problem poses a serious threat to people in the immediate vicinity of the Pet-keg.

A known container made of plastic, for example, a Pet-keg for drinks with a closing valve with a seal (patent for the invention of the Russian Federation Mo 2466085, date of conventional priority 29.10.2008,

IPC 8670 1/08), in which the shut-off valve and/or seal and, therefore, the keg head are designed in such a way that after the opening process, the next automatic closing process is carried out or almost not completely, because during this next automatic closing process, a through hole remains , which does not close. This one is through

The hole provides pressure relief inside the vessel. Due to this, excessive pressure cannot build up inside the vessel and thereby eliminates the potential danger of vessel rupture. At the same time, the shut-off valve contains a support with a specified point of rupture for a spring-loaded seal. The seal has a specified point of rupture or is made with the possibility of deformation during the closing process with the formation of a through hole.

This type of valve prevents the destruction of Pet-kegs not during the entire period of use, but only after the previously conducted opening process in the case of the next automatic closing process, which makes it impossible to further use the Pet-keg after opening, that is, the filling head can be put on only once. If the filling head is disconnected, the Pet-keg loses its tightness and is not suitable for further use, accordingly, the rest of the product becomes unusable. It should be noted that during Pet-keg operation, it is often necessary to disconnect the filling head until the Pet-keg is completely emptied, for example, in the event of a malfunction of the filling head or the filling system as a whole or regular sanitary treatment of the filling system.

It should also be noted that in the known solution, the valve does not prevent destruction of Pet-kegs with the product during storage and transportation.

A well-known valve for a vessel according to the patent of the Russian Federation for utility model Me117417 (priority date 02.07.2012, IPC B6701/12), which contains a body made in the form of a glass, a hollow rod, an annular valve, a spring and a cover with a means of connection are installed in it for connection with the neck of the vessel, while the first end of the rod is open and connected to the bottom of the body, protruding beyond its limits, and the second end of the rod is closed and provided with a flange, in addition, at least one window is made in the forming surface of the rod, at the same time, an annular valve is installed on the rod with the possibility of movement along the rod between the bottom of the housing and the flange of the rod, the central hole of which is equipped with an annular ledge made with the possibility of interaction with the flange of the rod, and a spring is installed between the annular valve and the bottom of the housing, in addition, in the forming surface the body has at least one window, while the cover is made in the form of a sleeve, on the inner surface of which there is a means of connection, the channel of which is equipped with an annular projection, made with the possibility of interaction with an annular shutter. (accepted as a prototype)

According to the prototype, the assembly of the structure is carried out in stages at the neck of the vessel, because including the placement of the body in the neck of the vessel with the help of a projection on the body and a ledge on the neck of the vessel and the subsequent installation of other elements, which is completed by the installation of a cover fixed by a threaded or locking connection to the outer surface of the neck .

The known design of the valve does not solve the problem of eliminating increased excessive pressure, which occurs in case of violation of the technical conditions of production, storage and operation of Pet-kegs filled with drink.

Disclosure of the invention

The technical task of the claimed invention is to create a universal technological valve design for the Pet-keg, which ensures high reliability, tightness of the structure with the possibility of performing the function of a safety valve in case of excessive pressure inside the Pet-kegs exceeding the maximum permissible.

The technical result consists in obtaining a reliable, technological and safe valve structure for Pet-keg.

The technical result is achieved by providing a valve structure for a Pet-keg, which includes a cover with a central opening with a means of connection to the neck of the keg, a hollow rod, a valve element, a spring, an ring nut, the first end of the rod being open and the second made closed with an annular protrusion, at least one window is made in the forming surface of the rod, a valve element is installed on the rod with the possibility of movement along it, the central hole of which is provided with an annular ledge, made with the possibility of interaction with the annular protrusion of the rod and an annular protrusion on the outer surface, made of the possibility of interaction with the valve element, and a spring is installed between the valve element and the ring nut, while the cap is made in the form of a mushroom and is connected to the ring nut by a threaded connection for direct installation of the valve structure on the neck of the keg, holes are made in the bottom part of the ring nut for the passage of gas, between the sides kom and the cylindrical surface of the foot of the cap fungus is placed with an annular gasket for sealing the connection between the cap and the neck of the Pet-keg, and the valve element is made with the possibility of performing the function of a safety valve and a trigger indicator from a polymer material with a Shore hardness of 40--60 units.

The main difference between this invention and the prototype is the provision of the possibility of operation of the valve element as a valve for filling and pouring a drink during normal operation

From operation and as a safety valve in case of excess pressure in the Pet-keg above the maximum allowable, and also as an indicator of the operation of the safety valve.

This invention is illustrated by graphic materials: fig. 1 - valve structure (with lock connection) in section; fig. 2 - valve structure with threaded connection in section; fig. C - a detailed view of the elements of the valve structure with a lock connection; fig. 4 - a detailed view of the elements of the valve structure with threaded connection; fig. 5 - cross-sectional view of the lid base.

The valve structure includes a cover 1 made in the shape of a mushroom with a central hole, a hollow rod 2 installed in it along the longitudinal axis, a valve element 3, a spring 4 and an annular nut 5, which ensures its compression (fig. 1, 2).

The cover 1 consists of a base 7, which can be made both in the form of a circle and in the form of a truncated equilateral triangle, the vertices of which are limited by a circle (see Fig. 5), equipped with a side 8 and a cylindrical leg 9. At the junction of the base 7 and the outer stiffening ribs 10 are made on the annular surface of the side 8. The valve structure can be connected to the neck of the Pet-keg both by a lock (Fig. 3) and threaded connection (Fig. 4). For locking with the neck of the Pet-keg on the side 8, petals 11 are made. For threaded connection with the neck of the Pet-keg on the side 8, an internal thread 21 is made. To ensure the manufacturability of screwing the structure on the neck of kegs with a thread, the surface of the lid is equipped with protrusions 12. Lid 1 is equipped with a central opening with an annular protrusion b, which interacts with the annular ledge 16 of the valve element 3. To ensure the tightness of the connection of the valve structure with the neck of the Pet-keg, an annular gasket 20 with a circular cross section is placed between the cylindrical leg of the mushroom 9 and the edge 8 of the cover 1 .

Rod 2 is hollow in the form of a tube. One end of the rod is open and passes through the hole of the ring nut 5, protruding beyond it. The second end of the rod 2 is closed and provided with a protrusion 13. At least one window 14 is placed in the upper part of the hollow rod 2.

A valve element 3 with a central opening equipped with an annular ledge 15, designed to interact with the protrusion 13 of the hollow rod 2, is installed on the rod 2 with the possibility of movement along it.

The pressing of the valve element C to the annular protrusion b of the cover 1 is carried out by the spring 4, which is installed between the ring nut 5 and the valve element 3. To prevent the material surface of the valve element C from being pressed, a sealing ring 17 is installed between it and the spring 4.

The ring nut 5 is attached to the cover 1 by a threaded connection. The ring nut 5 is equipped with centering petals 18, as well as holes for the passage of liquid or gas.

Implementation of the invention

For the manufacture of the valve structure, polymeric materials are used, in particular, the cover, stem and ring nut of the valve structure are made of polyacetal, and the valve element C, depending on the required operating pressure, is made of polymeric materials with a Shore hardness of 40-60 units, made of: thermoplastics (TEP ), or rubber based on ethylene-propylene-diene rubber (EPDM), or silicone.

The valve structure according to the present invention is installed on the neck 19 of the Pet-keg. At the same time, the attachment can be carried out by a threaded connection using an internal thread 21 or using a lock fastener formed by petals 11.

In the case of using a locking connection, the petals 11 fit into the groove between the ring protrusions on the outer surface of the Pet-keg neck.

In the case of using a threaded connection, the attachment is carried out by using the internal thread 21 on the side 8.

Pouring liquid into the Pet-keg, as well as draining the liquid from it, is carried out using a valve structure installed on the neck of the Pet-keg. To ensure liquid filling, a drink filling tube is connected to the open end of the hollow rod 2.

Filling the Pet-keg is carried out as follows.

The filling head of the filling line (not shown in the figure) has one or more protrusions that press on the surface of the spring-loaded valve element 3, which is open from the side of the cover 1. At the same time, the first annular channel between the valve element C and the cap mushroom 9, as well as the second, is opened channel formed by the inner channel of a hollow rod with an open window 14 on its forming surface. Filling the Pet-keg with a drink is carried out

Out through the second channel, while the gas in the Pet-keg is squeezed out through the first channel. After removing the pressure from the filling head on the valve element 3, it returns to its original position, closing the channels. Storage and transportation

Pet keg filled with drink is made with valve element 3 closed.

Pouring liquid from the Pet-keg is carried out in the opposite way: the protrusions of the pouring head (not shown in the figures) press on the surface of the spring-loaded valve element 3, which is open from the side of the lid 1. At the same time, the first annular channel between the valve element 3 and the cap fungus 9 is opened, as well as the second channel formed by at least one window 14 on the forming surface of the hollow rod 2. An inert gas is supplied to the keg through the first annular channel under excessive pressure from the outer vessel, which squeezes the liquid inside the keg through the tube, the hollow rod 2 is attached to it, and window 14 on the forming surface of the hollow rod 2.

In the conditions of transportation, storage and operation in case of excess pressure in

When the pet-keg is above the maximum allowable, the valve element C is irreversibly squeezed out of the valve structure above the upper end of the cover 1 and excessive pressure is released, thus preventing the destruction (rupture) of the Pet-keg.

The squeezing of the valve element, which is observed visually, signals to the consumer that the valve has tripped and that the drink is unfit for further use. In addition, the extruded valve element does not allow the filling head to be attached to the valve structure, preventing the possible operation of the Pet-keg with an unsuitable drink.

Taking into account the fact that the pressure of destruction of the Pet-keg is 7-8 bar, and the working pressure is 2.5-3.0 bar, the maximum allowable pressure in the Pet-keg should be within 4-6 bar.

Design tests according to this invention were carried out.

Example 1

The valve element was made of TEP with a Shore hardness of 54:22 units. The design could withstand working pressure up to 4.5 bar. When a pressure of P-b bar was reached, the valve was triggered in 60-120 minutes at an ambient temperature of 25-26 76.

Example 2

The valve element was made of TEP with a Shore hardness of 4752 units. The design could withstand working pressure up to 4.0 bar. When a pressure of P-5.5 bar was reached, the valve was triggered in 30-60 minutes at a temperature of 25-26 76.

Example C

The valve element was made of EPDM with a Shore hardness of 47:52 units. The design could withstand working pressure up to 4.0 bar. When a pressure of P-5.5 bar was reached, the valve was triggered in 50-180 minutes at a temperature of 25-26 76.

Example 4

The valve element was made of silicone with a Shore hardness of 50:52 units. The design could withstand working pressure up to 4.5 bar. When a pressure of P-b bar was reached, the valve was triggered in 60-120 minutes at a temperature of 25-26 76.

Example 5

The valve element was made of silicone with a Shore hardness of 412 units. The design could withstand working pressure up to 3.5 bar. When a pressure of P-5.5 bar was reached, the valve was triggered in 5-15 minutes at a temperature of 25-26 276.

The advantages of this invention are: p- ensuring the safety of storage and operation of Pet-kegs due to the performance of the function of a safety valve in the event of exceeding the excessive pressure in the PET kez above the maximum allowable and preventing the destruction (rupture) of the Pet-keg; - indication of valve operation due to non-reversible extrusion of the valve element in case of exceeding the pressure in the PET case above the maximum permissible; 11- prevention of the use of an unsuitable drink due to the impossibility of connecting the pouring head to the valve structure with the extruded valve; n- the manufacturability of the structure due to the possibility of separately assembling the elements of the valve structure, installing it in the assembled form on the Pet-keg and further filling the Pet-keg on an automatic production line;

P - versatility due to the possibility of using the valve structure for different types of nozzles and dosing heads by replacing only one element - the cover of the valve structure;

And - ensuring the reliability and tightness of the device due to the use of a threaded connection of the cover and ring nut, as well as sealing the neck of the Pet-keg along its end in the case of a connection with a valve structure.

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Claims (8)

FORMULA OF THE INVENTION 1. A valve structure for a PET keg, comprising a cap with a central opening with a means of connection to the neck of the keg, a hollow stem, a valve element, a spring, an annular nut, wherein the first end of the stem is open and the second end is closed with an annular projection , at least one window is made in the forming surface of the rod, a valve element is installed on the rod with the possibility of movement along it, the central hole of which is provided with an annular ledge, made with the possibility of interaction with the annular protrusion of the rod and an annular protrusion on the outer surface, made with the possibility of interaction with the valve element , and a spring is installed between the valve element and the ring nut, which is distinguished by the fact that the cap is made in the form of a mushroom and is connected to the ring nut by a threaded connection for direct installation of the valve structure on the neck of the keg, in the bottom part of the ring nut there are holes for passage gas, and between the rim and the cylindrical surface an annular gasket is placed on the legs of the lid fungus to seal the connection between the lid and the neck of the keg, while the valve element is made of polymer material with a Shore hardness of 40-60 units. with the possibility of non-rotating extrusion above the upper end of the lid in case of excess pressure in the PET keg above the maximum allowable for venting excess pressure and visual observation of the valve operation. 2. Valve design for a PET keg according to claim 1, which is characterized by the fact that the valve element is made of thermoplastic or rubber based on ethylene-propylene-diene rubber or silicone. 3. The valve structure for a PET keg according to claim 1, which is characterized by the fact that the outer surface of the lid is made in the form of a circle or a truncated equilateral triangle, the vertices of which are limited by a circle. 4. The valve design for a PET keg according to claim 1, which is characterized by the fact that the means of connecting the lid to the neck of the keg is threaded. 5. The valve structure for a PET keg according to claim 1, which is characterized by the fact that the outer surface of the lid is made with ledges to increase the manufacturability of its installation on the neck with a bo thread. 6. Valve design for a PET keg according to claim 1, which is characterized by the fact that the means of connecting the lid to the neck of the keg is made of a lock. KUSCHA and m: NI o: Ra YAN --e-хх Z S х u Й и и и и и и и EN, KN shnih i IK MK ih Hom MK i t ke o a em SHA VV I I Z KK ZK y i z. There are: p, And and more. I What is 00 SHVA EL i I Z x KU ah U ZBK s : i ZY yy : skh ne vky MINE s TET Yo ZE o is SN: --7 Ш Z : MO U V TE poodyus y Y SCHE a what inn She SHO o ho MO i SKU I Kn sha Y ; Kk E B KZ «v dn Z : t M 5 My AI. let Fig i rak a ee -- o 15 17 Mer iz o o i 1 Kn i i UZH oh Ii KU U 7 E BA - BK in ex. And and. U ok "Zh nis, Ka MU sia Ki o BO staBiK eh Y 7 i yy sche Oy rya m: Man o y: v sche rai : - ; I'm all about him. for with her i Kk y x sZ y x ; r I I I I and cha a 0 B EE, eats and koine aku SHE KE her A KE. and E Mk shk 5 SK in and so SHE; shk What 19. ih sho i y Te OS 9th I lei i t. i x 5 Zh k SK zva sa E s U Shko x I V m shi. AI I iv shchi i r ; IN ME SHE: hi 1 uh ish «t 8. ve o VI wai du V y KE i ih te A Me ee o t Vey BOLA oi ho MZHK y loh yk I ket i 17 Se A y I a NI NK ! х и Yasla Х и Я В хи Sakru: A kt я Я. ; weight would, Z . M ZI Жде и и ех | 3 Э оту и ей ин кет ВВ о З | y y y ny a y y y Yin: y y y sree, y a y y zh Sa x Fa (s) a CHI ssh SK /y r | Shk " y Y Iy Y Shk i Zh ZinM Fo