Valve device for a medical fluid line system
A valve device for a medical fluid line system includes a main body, the main body having a first fluid passage and a second fluid passage, each fluid passage of the first and second fluid passages extending between an inlet side and an outlet side of the main body. The main body has a first wall portion and a second wall portion which are each elastically displaceable, under an effect of fluid pressure, relative to a substantially dimensionally stable web portion of the main body. Each wall portion of the first and second wall portions is arranged on the web portion, forming one of the first and second fluid passages, in such a way that the first fluid passage is substantially uninfluenced by a fluid-pressure-induced deformation of the second wall portion, and the second fluid passage is substantially uninfluenced by a fluid-pressure-induced deformation of the first wall portion.
1. A valve device for a medical fluid line system, the valve device comprising:
a main body having an inlet side and an outlet side, the main body configured to be flexible at least in part; and
a first fluid passage and a second fluid passage which each extend between the inlet side and the outlet side of the main body,
the main body configured in such a way, and the first and second fluid passages are arranged in such a way that,
in an event of a fluid overpressure between the inlet side and the outlet side, the first fluid passage is freed by a fluid-overpressure-induced elastic deformation of the main body, and the second fluid passage is sealed off in a fluid-tight manner, and,
in an event of a fluid underpressure between the inlet side and the outlet side, the second fluid passage is freed by means of a fluid-underpressure-induced elastic deformation of the main body, and the first fluid passage is sealed off in a fluid-tight manner, and,
in an event of a neutral fluid pressure between the inlet side and the outlet side, the first and second fluid passages are sealed off in a fluid-tight manner,
the main body having a first wall portion and a second wall portion which are each elastically displaceable, under an effect of a fluid pressure, relative to a substantially dimensionally stable web portion of the main body and are each arranged on the web portion, thereby each forming one of the first and second fluid passages, in such a way that the first fluid passage is substantially uninfluenced by a fluid-pressure-induced deformation of the second wall portion, and the second fluid passage is substantially uninfluenced by a fluid-pressure-induced deformation of the first wall portion,
the first wall portion and the web portion forming a first lumen therebetween, the first lumen narrowing to a minimum cross section, the minimum cross section of the first lumen adjoining and opening directly into the first fluid passage, and
the second wall portion and the web portion forming a second lumen therebetween, the second lumen narrowing to a minimum cross section, the minimum cross section of the second lumen adjoining and opening directly into the second fluid passage.
2. The valve device according to claim 1 , wherein the first and second wall portions are arranged on mutually opposite side faces of the web portion and thus separately from one another.
3. The valve device according to claim 1 , wherein the first and second wall portions, with respect to a sealed-off state, each bear at least in part on the web portion in a manner of a sealing lip, wherein in each case one of the first and second fluid passages is configured in a form of a slit between the web portion and one of the first and second wall portions.
4. The valve device according to claim 1 , wherein the first fluid passage is formed between a front end of the first wall portion, directed towards the outlet side, and the web portion, and the second fluid passage is formed between a front end of the second wall portion, directed towards the inlet side, and the web portion.
5. The valve device according to claim 1 , wherein the first and second wall portions span the web portion at least partially in a curve in order to form the first lumen and the second lumen, respectively.
6. The valve device according to claim 5 , wherein the first and second lumens are each shaped in a manner of a flow nozzle and are oriented in opposite directions relative to each other fluidically, in such a way that an inlet opening of the first lumen is oriented in a direction of the inlet side, and an inlet opening of the second lumen is oriented in a direction of the outlet side, wherein the first and second fluid passages each form an outlet opening of the first and second lumens, respectively.
7. The valve device according to claim 1 , wherein the first and second wall portions are configured to be elastically displaceable to different extents, in such a way that the first and second fluid passages are freed and/or sealed off at quantitatively different fluid pressures.
8. The valve device according to claim 7 , wherein the first and second wall portions have different wall thicknesses, wall thickness profiles and/or elastic properties.
9. The valve device according to claim 7 , wherein the first and second wall portions are inclined to different extents and/or extend by different lengths relative to the web portion, such that a pressure surface of the first wall portion, projected perpendicularly with respect to the inlet side, is different than a pressure surface of the second wall portion, projected perpendicularly with respect to the outlet side.
10. The valve device according to claim 1 , wherein the main body has an annular profile portion which is provided for form-fit connection to an internal diameter of a medical fluid line component, the annular profile portion having a circumference.
11. The valve device according to claim 10 , wherein the annular profile portion circumferentially engages at least in part around the web portion, centrally with respect to a longitudinal extent of the web portion.
12. The valve device according to claim 10 , wherein the first and second wall portions are each connected to the annular profile portion at an end directed away from a respective fluid passage of the first and second fluid passages.
13. The valve device according to claim 10 , wherein the first wall portion comprises a first partially circular end connected to a first side of the annular profile portion, and the second wall portion comprises a second partially circular end connected to a second side of the annular profile portion opposite the first side, the first partially circular end and the second partially circular end each lying inside the circumference of the annular profile portion.
14. The valve device according to claim 1 , wherein the main body is configured in one piece.
15. A valve device for a medical fluid line system, the valve device comprising:
a main body having an inlet side, an outlet side, an annular portion, and a web portion; and
a first fluid passage and a second fluid passage which each extend between the inlet side and the outlet side of the main body,
the web portion defining a central longitudinal axis through a center of the annular portion, with the web portion extending parallel to the central longitudinal axis,
the annular portion having a circumference that defines a circular plane, the web portion extending perpendicularly to the circular plane through a center of the circular plane,
the main body configured in such a way, and the first and second fluid passages are arranged in such a way that,
in an event of a fluid overpressure between the inlet side and the outlet side, the first fluid passage is freed by a fluid-overpressure-induced elastic deformation of the main body, and the second fluid passage is sealed off in a fluid-tight manner, and,
in an event of a fluid underpressure between the inlet side and the outlet side, the second fluid passage is freed by a fluid-underpressure-induced elastic deformation of the main body, and the first fluid passage is sealed off in a fluid-tight manner, and,
in an event of a neutral fluid pressure between the inlet side and the outlet side, the first and second fluid passages are sealed off in a fluid-tight manner,
the main body having a first wall portion and a second wall portion, the first and second wall portions each being elastically displaceable in a radially outward direction with respect to the central longitudinal axis and the web portion under an effect of a fluid pressure, the first and second wall portions each forming one of the first and second fluid passages, in such a way that the first fluid passage is substantially uninfluenced by a fluid-pressure-induced deformation of the second wall portion, and the second fluid passage is substantially uninfluenced by a fluid-pressure-induced deformation of the first wall portion.