[특허]Pressure reducer for a device for enriching a liquid with carbon dioxide

LUXEMBOURG PATENT COMPANY S.A.

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특허 상세정보

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Pressure reducer for a device for enriching a liquid with carbon dioxide

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16K-031/12 G05D-016/00 F16K-001/30 F16K-027/02 G05D-016/10
출원번호	US-0700778 (2011-06-03)
등록번호	US-9098091 (2015-08-04)
우선권정보	EP-10164892 (2010-06-03)
국제출원번호	PCT/EP2011/059200 (2011-06-03)
§371/§102 date	20130220 (20130220)
국제공개번호	WO2011/151444 (2011-12-08)
발명자 / 주소	Bormes, Sascha
출원인 / 주소	LUXEMBOURG PATENT COMPANY S.A.
대리인 / 주소	Cantor Colburn LLP
인용정보	피인용 횟수 : 0 인용 특허 : 4

초록
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A pressure reducer includes a housing with an axially displaceable biased control body in order to close a connection between an inlet and an expansion chamber, where the housing is equipped with an axially displaceable biased actuating piston in order to displace the control body against the spring load of the control body as a function of the pressure in the expansion chamber and to open the connection, the housing being made of plastic, and the pressure reducer includes a separately made insert, where the insert is fixed between the inlet and the expansion chamber in the plastic housing and said insert has a guide bore, which is connected to the inlet and supports the control body, and a connecting bore, which adjoins the guide bore and which opens into the expansion chamber, where the insert forms an annular shoulder surface between the connecting bore and the guide bore, said shoulder surface interacting as a seating surface with the seal on the control body.

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청구항
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1. A pressure reducer for a device for enriching a liquid with gas comprising: a housing made of a plastic material, said housing having an inlet, an inlet port for connecting said pressure reducer to a gas vessel, an outlet, an outlet port for connecting said pressure reducer to a continuous flow mixer, and an expansion chamber for expanding the enrichment gas to a reduced pressure;a control body arranged in the housing so as to be axially displaceable in said housing, said control body being biased in a closing direction by means of a first spring so as to close a connection between said inlet and said expansion chamber, and said control body comprising a first seal which co-operates with a seating surface upstream of said expansion chamber;an actuating piston arranged in the housing so as to be axially displaceable in said housing, said actuating piston being biased by means of a second spring so as to displace said control body in an opening direction as a function of the pressure in said expansion chamber and thus to open the connection between said inlet and said expansion chamber, wherein the actuating piston delimits one side of the expansion chamber such that a variable internal volume of said expansion chamber is determined by an axial position of said actuating piston, and said actuating piston comprising a second seal which seals the expansion chamber relative to the outside;wherein said pressure reducer further comprises a separately made insert which is arranged in said housing in a seating between said inlet and said expansion chamber, said insert comprising a guide bore, which is connected to said inlet and which supports said control body axially displaceably, and a connecting bore adjoining said guide bore, said connecting bore being connected to said expansion chamber and said connecting bore being of a reduced diameter relative to the guide bore, such that said insert forms an annular shoulder surface at a step between said connecting bore and said guide bore, said annular shoulder co-operating as a seating surface with said first seal of said control body,wherein a seating is provided in the insert at the inlet end thereof, in which seating is mounted a first retaining plate with a gas passage, which forms an immobile support for the first spring. 2. The pressure reducer according to claim 1, wherein said separately made insert is made of metal, or of a suitable plastic. 3. The pressure reducer according to claim 1, wherein said housing is made in one piece of plastic. 4. The pressure reducer according to claim 1, wherein said insert comprises an external thread, by means of which the insert is screwed into a corresponding internal thread of the seating and wherein a third seal is provided between said insert and said housing. 5. The pressure reducer according to claim 1, wherein said housing is of angled construction, such that a center line of said inlet port and a center line of said outlet port extend transversely of the displacement direction of said control body. 6. The pressure reducer according to claim 1, wherein said inlet port and/or said outlet port takes the form of a thread formed in one piece with the housing. 7. The pressure reducer according to claim 1, wherein said actuating piston is made in one piece and comprises a front end, a rear end and a cylindrical circumferential surface, said rear end being provided with a mount for said second spring, said front end being provided with a coaxial extension, which co-operates with the control body for the displacement thereof, and said cylindrical circumferential surface being provided with a circumferential groove for accommodating the second seal. 8. The pressure reducer according to claim 7, wherein a second retaining plate with a gas passage is mounted in the end of the guide chamber which is opposite to the insert, said second retaining plate being produced as an injection moulded part of plastic, and said second retaining plate forming an immobile support for said second spring, wherein said second spring is mounted between said second retaining plate and said seating in said actuating piston. 9. The pressure reducer according to claim 1, wherein said axially displaceable actuating piston is arranged in a cylindrical guide chamber of said housing, said cylindrical guide chamber being open to the outside, said actuating piston sealing the variable expansion chamber in said cylindrical guide chamber towards the insert, said seating of said insert opens into the guide chamber and is of substantially cylindrical construction with a distinctly smaller internal diameter than the guide chamber, and wherein the maximum external diameter of the insert is smaller than the minimum internal diameter of the guide chamber. 10. The pressure reducer according to claim 9, wherein said insert comprises a shank portion of smaller diameter and a head portion of larger diameter and forms a shoulder surface between the head portion and shank portion, and wherein said shoulder surface rests as an axial limit stop against a shoulder surface which is formed by a step between the guide chamber and receptacle. 11. The pressure reducer according to claim 10, wherein said insert comprises an external thread, by means of which the insert is screwed into a corresponding internal thread of the seating and wherein a third seal is provided between said insert and said housing, wherein the external thread of the insert is provided on the shank portion thereof and wherein the head portion forms a profile suitable for a screwing tool. 12. The pressure reducer according to claim 1, wherein said control body comprises a turned piece made in one piece from metal, with at least a first portion of small diameter at an outlet end, a second middle portion of intermediate diameter and a third portion of a larger diameter at an inlet end, wherein the first portion protrudes with radial play through said connecting bore in said insert and rests against the actuating piston, wherein the first seal is mounted at the transition between the first and second portions, and wherein the third portion is guided with radial play in the guide bore in the insert. 13. The pressure reducer according to claim 12, wherein said turned piece comprises a circumferential recess at a transition between the first and second portions for retaining said first seal and wherein said second portion comprises an external thread, and wherein said control body comprises a retaining sleeve which is screwed onto the external thread in the second portion to secure the first seal. 14. The pressure reducer according to claim 12 wherein said turned piece comprises a fourth portion of a diameter at the inlet end which serves as a radial mount for said first spring. 15. A pressure reducer for a device for enriching a liquid with gas comprising: a housing made of a plastic material, said housing having an inlet, an inlet port for connecting said pressure reducer to a gas vessel, an outlet, an outlet port for connecting said pressure reducer to a continuous flow mixer, and an expansion chamber for expanding the enrichment gas to a reduced pressure;a control body arranged in the housing so as to be axially displaceable in said housing, said control body being biased in a closing direction by means of a first spring so as to close a connection between said inlet and said expansion chamber, and said control body comprising a first seal which co-operates with a seating surface upstream of said expansion chamber;an actuating piston arranged in the housing so as to be axially displaceable in said housing, said actuating piston being biased by means of a second spring so as to displace said control body in an opening direction as a function of the pressure in said expansion chamber and thus to open the connection between said inlet and said expansion chamber, wherein the actuating piston delimits one side of the expansion chamber such that a variable internal volume of said expansion chamber is determined by an axial position of said actuating piston, and said actuating piston comprising a second seal which seals the expansion chamber relative to the outside;wherein said pressure reducer further includes a separately made insert which is arranged in said housing in a seating between said inlet and said expansion chamber, said insert comprising a guide bore, which is connected to said inlet and which supports said control body axially displaceably, and a connecting bore adjoining said guide bore, said connecting bore being connected to said expansion chamber and said connecting bore being of a reduced diameter relative to the guide bore, such that said insert forms an annular shoulder surface at a step between said connecting bore and said guide bore, said annular shoulder co-operating as a seating surface with said first seal of said control body;wherein said axially displaceable actuating piston is arranged in a cylindrical guide chamber of said housing, said cylindrical guide chamber being open to the outside, said actuating piston sealing the variable expansion chamber in said cylindrical guide chamber towards the insert, said seating of said insert opens into the guide chamber and is of substantially cylindrical construction with a distinctly smaller internal diameter than the guide chamber, and wherein the maximum external diameter of the insert is smaller than the minimum internal diameter of the guide chamber; andwherein said insert includes a shank portion of smaller diameter and a head portion of larger diameter and forms a shoulder surface between the head portion and shank portion, and wherein said shoulder surface rests as an axial limit stop against a shoulder surface which is formed by a step between the guide chamber and receptacle. 16. The pressure reducer according to claim 15, wherein said insert comprises an external thread, by means of which the insert is screwed into a corresponding internal thread of the seating and wherein a third seal is provided between said insert and said housing, wherein the external thread of the insert is provided on the shank portion thereof and wherein the head portion forms a profile suitable for a screwing tool.

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Pressure reducer for a device for enriching a liquid with carbon dioxide

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Pressure reducer for a device for enriching a liquid with carbon dioxide

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