Sealing connector for fluid collection systems
The present disclosure relates to connectors for connecting resilient collecting tubes in fluid collection systems. The connectors comprise sealing elements to prevent leakages such as air leakage in fluid collection systems operating under vacuum.
1. A connector in a fluid collection system for fluidly connecting a resilient collecting tube thereto, the connector comprising:
one or more fluid receiving end and one or more fluid efflux end fluidly connected through a connector body comprising a conduit having a long axis and an outer diameter,
at least one of said one or more fluid receiving end and one or more fluid efflux end is a resilient collecting tube coupling end comprising a resilient collecting tube retention structure having at least one resilient collecting tube diameter expanding member comprising a retention edge, wherein the at least one resilient collecting tube diameter expanding member has a diameter, at the retention edge, greater than the outer diameter of the connector body, the resilient collecting tube adopting a constricting curvature on either side of the retention edge,
a resilient sealing member,
first and second sealing flanges to position the sealing member therebetween and having relative heights configured to define a sloping sealing line of contact that forms a sealing angle with the long axis of the conduit and enables the resilient collecting tube to sealingly compress the resilient sealing member along the sloping sealing line of contact to form a sealing contact zone and whereby the tube is free to engage the retention edge to form a retention coupling.
2. The connector of claim 1 wherein the sloping sealing line of contact substantially matches the constricting curvature of the collecting tube in the sealing contact zone.
3. The connector of claim 2 wherein the resilient sealing member has an uncompressed diameter greater than the height of the first and second sealing flanges.
4. The connector of claim 2 wherein the tube retention structure comprises two resilient collecting tube diameter expanding members, the two resilient collecting tube diameter expanding members having a first resilient collecting tube diameter expanding member proximal to a coupling end opening and having a second resilient collecting tube diameter expanding member located distal to the opening, and wherein the resilient sealing member is located between the two resilient collecting tube diameter expanding members.
5. The connector of claim 4 wherein the proximal resilient collecting tube diameter expanding member has a greatest diameter smaller than a greatest diameter of the distal resilient collecting tube diameter expanding member.
6. The connector of claim 4 wherein the first resilient collecting tube diameter expanding member is a barb.
7. The connector of claim 6 wherein the height of the barb is about 1.5 to 2.5 times the height of the first sealing flange adjacent to the barb.
8. The connector of claim 7 wherein the height of the first sealing flange is between about 1.2 and 1.7 times the height of the second sealing flange, and wherein the first sealing flange is between the second sealing flange and the barb.
9. The connector of claim 8 wherein a height of the resilient sealing member is between about 1.2 and 4 times the height of the first sealing flange.
10. The connector of claim 6 wherein the barb is the first sealing flange and collaborates with the second sealing flange and the resilient sealing member to form the sealing line of contact with the resilient collecting tube.
11. The connector of claim 10 wherein the barb has a height of about 0.9 mm and the second sealing flange has a height of between approximately 0.65 mm and 0.75 mm and the resilient sealing member has a height of approximately 1 mm.
12. The connector of claim 11 wherein the sealing angle is between approximately 4.5 and 7.5 degrees.
13. The connector of claim 10 wherein the resilient sealing member is an O-ring.
14. The connector of claim 13 wherein the O-ring is made of silicone.
15. The connector of claim 4 wherein the resilient sealing member is located after the distal resilient tube diameter expanding member.
16. A spout in a vacuum operated sap collection system for fluidly connecting a resilient collecting tube thereto, the spout comprising:
one or more fluid receiving end and one or more fluid efflux end fluidly connected through a connector body comprising a conduit having a long axis and an outer diameter,
at least one of said one or more fluid receiving end and one or more fluid efflux end is a resilient collecting tube coupling end comprising a resilient collecting tube retention structure having at least one resilient collecting tube diameter expanding member comprising a retention edge, wherein the at least one resilient collecting tube diameter expanding member has a diameter, at the retention edge, greater than the outer diameter of the connector body, the resilient collecting tube adopting a constricting curvature on either side of the retention edge,
a resilient sealing member,
first and second sealing flanges to position the sealing member therebetween and having relative heights configured to define a sloping sealing line of contact that forms a sealing angle with the long axis of the conduit and enables the resilient collecting tube to sealingly compress the resilient sealing member along the sloping sealing line of contact to form a sealing contact zone and whereby the tube is free to engage the retention edge to form a retention coupling.
17. The spout of claim 16 wherein the tube retention structure comprises two resilient collecting tube diameter expanding members, a first of said two resilient collecting tube diameter expanding members located proximal to a coupling end opening and a second resilient collecting tube diameter expanding member located distal to the opening, and wherein the resilient sealing member is located between the first and second resilient collecting tube diameter expanding members.
18. The spout of claim 17 wherein the first resilient collecting tube diameter expanding member is a barb and wherein the barb is the first sealing flange and collaborates with the second sealing flange and the resilient sealing member to form the sealing line of contact with the resilient collecting tube, the barb having a height of about 0.9 mm and the second sealing flange has a height of between approximately 0.65 mm and 0.75 mm and the resilient sealing member has a height of approximately 1 mm.