Disposable drainage bags and disposable peritoneal dialysis drainage bags

Abstract

The invention discloses a disposable drainage bag and a disposable peritoneal dialysis drainage bag. The disposable peritoneal dialysis drainage bag comprises: a first bag body; a transmission component, which comprises a first transmission tube, a second transmission tube, a protective cap, a hoop and a peritoneal dialysis three-way joint; the peritoneal dialysis three-way joint comprises a dialysis Luer joint, a liquid inlet joint and a liquid outlet joint; the protective cap is detachably covered on the dialysis Luer joint; at least one of the liquid inlet joint and the liquid outlet joint is provided with a reduced diameter section and an expanded section; the annular interface between the reduced diameter section and the expanded section forms a connecting step; the connecting step is fixedly sleeved inside the tube end of the connected transmission tube, and the hoop is fixedly sleeved outside the tube end of the transmission tube, so that the transmission tube and the corresponding joint are non-adhesively sealed and fitted; wherein the peritoneal dialysis three-way joint having the dialysis Luer joint, the liquid inlet joint and the liquid outlet joint is an injection-molded integrated structure.

Description

Technical Field

[0001] The present application relates to the field of medical supplies, and in particular to a disposable drainage bag and a disposable peritoneal dialysis drainage bag. Background Art

[0002] Peritoneal dialysis uses the properties of the peritoneum as a semi-permeable membrane. The prepared dialysate is regularly and regularly infused into the patient's peritoneal cavity through a catheter by gravity. Due to the concentration gradient difference of solutes on both sides of the peritoneum, the solutes on the high-concentration side move to the low-concentration side (diffusion effect); water moves from the low-osmotic side to the high-osmotic side (osmotic effect). The peritoneal dialysis fluid is continuously replaced to achieve the purpose of removing metabolic products and toxic substances in the body and correcting water and electrolyte imbalance.

[0003] In the existing technology, for continuous ambulatory peritoneal dialysis (CAPD), patients can manually replace the dialysate themselves, for example, 2 to 5 times a day. The Luer three-way connector used in the existing peritoneal dialysis drainage bag that matches the peritoneal dialysis external tube is a split structure, which not only needs to be made separately in terms of technology, but also the overall manufacturing and assembly process of the peritoneal dialysis drainage bag is complicated, usually manual docking and assembly are used, and the manufacturing efficiency is low. As a disposable medical consumable, it will also affect the increase in cost.

[0004] In addition, when the connector used in the existing waste liquid bag for peritoneal dialysis is inserted into the bag end of the waste liquid bag for welding, the film layers on the upper and lower sides of the connector tube need to face each other and wrap the connector tube during the docking process. At this time, if the position accuracy of the connector tube is insufficient or the accuracy of the welding head itself decreases, it is easy to cause the two film layers to form a docking gap near the connector tube when docking, and an effective seal cannot be formed, which leads to the production of defective products. As a follow-up, the connector tube of the existing waste liquid bag is bonded by glue when connecting the PVC catheter. Its assembly process is also relatively complicated and requires manual operation, which not only affects the manufacturing efficiency, but also restricts the manufacturing cost. Summary of the invention

[0005] In view of the shortcomings of current peritoneal dialysis drainage bags, one object of the present application is to provide a new type of disposable drainage bag and disposable peritoneal dialysis drainage bag, so as to simplify the assembly process and save manufacturing costs.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] A disposable peritoneal dialysis drainage bag, comprising:

[0008] A first bag body, which is used to collect fluid discharged during peritoneal dialysis;

[0009] The transmission assembly comprises a first transmission tube, a second transmission tube, a protective cap, a cuff and a peritoneal dialysis three-way connector; the peritoneal dialysis three-way connector is provided with a reduced diameter section and an expanded section; the annular interface between the reduced diameter section and the expanded section forms a connecting step;

[0010] The peritoneal dialysis three-way connector comprises a dialysis Luer connector, a liquid inlet connector, and a liquid outlet connector; the dialysis Luer connector is used to connect the peritoneal dialysis external tube; the protective cap is detachably covered on the dialysis Luer connector; one end of the first transmission tube is fixedly connected to the liquid inlet connector, and the other end is used to connect to the second bag containing the dialysis solution; the second transmission tube is fixedly connected to the liquid outlet connector and the first bag;

[0011] At least one of the liquid inlet joint and the liquid outlet joint is provided with a reduced diameter section and an expanded section; the annular interface between the reduced diameter section and the expanded section forms a connecting step; the connecting step is fixedly sleeved inside the pipe end of the connected transmission pipe, and the hoop is fixedly sleeved outside the pipe end of the transmission pipe, so that the transmission pipe and the corresponding joint are non-adhesively sealed and fitted;

[0012] Wherein, the peritoneal dialysis three-way connector having the dialysis Luer connector, the liquid inlet connector and the liquid outlet connector is an injection-molded integrated structure.

[0013] Preferably, the heat resistance of the material of the cuff is better than the heat resistance of the material of the peritoneal dialysis three-way connector.

[0014] Preferably, the hoop does not undergo plastic deformation under temperature changes within a range of -50 degrees Celsius to 150 degrees Celsius.

[0015] Preferably, the peritoneal dialysis three-way connector is made of TPEE; the first transmission tube and the second transmission tube are made of TPE; the material of the cuff is selected from one of ABS, PC, TPEE, PS, aluminum, copper, silicone and rubber.

[0016] Preferably, the hoop spans across the connecting step, one end of the hoop is sleeved outside the reducing section, the other end of the hoop is sleeved outside the expanding section, and a reducing portion is provided at a position corresponding to the connecting step.

[0017] Preferably, the hoop sleeve is a silicone sleeve; the wall thickness of the silicone sleeve is greater than 0.8 mm and less than 1.5 mm.

[0018] Preferably, the inner diameter of the silicone sleeve in a natural state without sleeve is smaller than the inner diameter of the non-sleeved section of the transmission tube.

[0019] Preferably, the inner diameter of the silicone sleeve in a natural state without sleeve is 0.1 mm to 0.8 mm different from the inner diameter of the non-sleeved section of the transmission tube.

[0020] Preferably, the length of the silicone sleeve provided on the expansion section is more than one sixth of the length of the expansion section.

[0021] A disposable drainage bag comprises: a first bag body, a transmission catheter, and a hoop;

[0022] The first bag body comprises: a liquid storage bag having a bag connection end and a drainage bag connector fixedly connected to the bag connection end;

[0023] The drainage bag connector is an integral injection molding structure, and has a first connection end and a second connection end along its length direction; the first connection end is used to be fixedly connected to the liquid storage bag; the second connection end is fixedly connected to the transmission catheter;

[0024] Wherein, the second connecting end is provided with a reduced diameter portion and an expanded portion; the reduced diameter portion is located on the side of the expanded portion close to the first connecting end, and the annular interface between the reduced diameter portion and the expanded portion forms a vertical step; the vertical step is fixedly sleeved inside the pipe end of the transmission conduit; the hoop is fixedly sleeved outside the pipe end of the transmission conduit, and the transmission conduit and the second connecting end are non-adhesively sealed and fitted.

[0025] Preferably, a stop structure is fixedly provided outside the reduced diameter portion; the tube end of the transmission conduit is sleeved outside the second connecting end and does not exceed the stop structure.

[0026] Preferably, the stop structure comprises a stop ring which is integrally injection-molded with the drainage bag connector.

[0027] Preferably, the drainage bag connector is made of PP material; and the transmission catheter is made of TPE material. Beneficial Effects

[0028] In the present invention, the peritoneal dialysis three-way connector is an integrated structure, not a split structure. Thus, the peritoneal dialysis three-way connector having the dialysis Luer connector, the liquid inlet connector and the liquid outlet connector is an integral injection-molded structure as a whole, and thus there is no need to manufacture and assemble them separately, thereby improving manufacturing efficiency. In addition, there is no split connection portion on the peritoneal dialysis three-way connector, and the structural strength thereof is higher.

[0029] The injection molding time of the peritoneal dialysis three-way connector using the structure of this embodiment is 4 pieces / 15 seconds, while the original manufacturing process of using a PVC three-way structure inserted into a dialysis Luer connector and then high-frequency welding is about 1 piece / 7 seconds to assemble a peritoneal dialysis three-way connector. It can be seen that the peritoneal dialysis drainage bag of the present invention greatly improves the manufacturing efficiency, thereby saving manufacturing costs, and can reduce the manual assembly process, thereby improving the process manufacturing level.

[0030] In the present invention, after high-temperature sterilization, the disposable drainage bag can maintain a sealed fit with the transmission catheter through the cuff, thereby avoiding disengagement while maintaining the seal, thereby improving the anti-detachment performance of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 It is a schematic structural diagram of a disposable peritoneal dialysis kit provided by one embodiment of the present invention;

[0033] Figure 2 yes Figure 1 A schematic diagram of the first bag structure;

[0034] Figure 3 yes Figure 2 Schematic diagram of the drainage bag connector structure;

[0035] Figure 4 yes Figure 3 AA section view and partial enlarged view;

[0036] Figure 5 Yes Figure 4 Schematic diagram of six different cross-sectional shapes of the connecting sheet;

[0037] Figure 6 Available in 4 different shapes Figure 2 Schematic diagram of the structure of the middle drainage bag connector;

[0038] Figure 7 yes Figure 3 Schematic diagram of the cross section of the connection between the middle connecting sheet and the bag opening film layer;

[0039] Figure 8 It is a schematic diagram comparing the cross-sections of the connecting sheet before and after welding with the bag opening film layer;

[0040] Fig. 9 yes Figure 1 A schematic cross-sectional structure diagram of the connection between the drainage bag connector and the second transmission tube;

[0041] Fig.10 is a schematic cross-sectional structure diagram of the connection between a drainage bag connector and a second transmission tube provided by another embodiment of the present invention;

[0042] Fig.11 yes Figure 1 A three-dimensional diagram of the peritoneal dialysis three-way connector structure;

[0043] Fig.12 yes Fig.11 Another view of;

[0044] Fig.13 yes Fig.12 A front view of

[0045] Fig.14 is a front view of a peritoneal dialysis three-way connector structure provided by another embodiment of the present invention;

[0046] Fig.15 is a schematic diagram of the connection between a transmission pipe and a joint provided by another embodiment of the present invention;

[0047] Fig.16 is a front view of a peritoneal dialysis three-way connector structure provided by another embodiment of the present invention;

[0048] Fig.17 is a front view of a peritoneal dialysis three-way connector structure provided by another embodiment of the present invention;

[0049] Fig.18 is a schematic structural diagram of a disposable drainage bag provided by another embodiment of the present application;

[0050] Fig.19 is a schematic structural diagram of a disposable drainage bag provided by another embodiment of the present application;

[0051] Fig. 20 yes Fig.19 A three-dimensional structural diagram of the drainage bag connector;

[0052] Fig.21 is a schematic structural diagram of a disposable drainage bag provided by another embodiment of the present application;

[0053] Fig. 22 yes Fig.21 Schematic diagram of the drainage bag connector structure;

[0054] Fig.23 yes Fig.21 A three-dimensional structural diagram of the connection joint;

[0055] Fig.24 is a structural front view of a connecting joint of another embodiment;

[0056] Fig.25 yes Fig.23 Schematic diagram of connection between the connecting joint and the transmission pipe;

[0057] Fig.26 is a schematic structural diagram of a connecting joint in another embodiment;

[0058] Fig. 27is a structural front view of a connecting joint in another embodiment;

[0059] Fig.28 is a structural front view of a connecting joint in another embodiment;

[0060] Fig.29 is a structural front view of a connecting joint in another embodiment;

[0061] Fig.30 is a schematic diagram of the connection between the drainage bag connector and the transmission tube catheter provided in another embodiment;

[0062] Fig.31 is a structural front view of a connecting joint provided in another embodiment;

[0063] Fig.32 is a structural front view of a connecting joint provided in another embodiment;

[0064] Fig.33 is a structural front view of a connecting joint provided in another embodiment;

[0065] Fig.34 yes Fig.31 A schematic diagram of the connection between the connecting joint and the transmission tube conduit;

[0066] Fig.35 is a schematic diagram of the drainage bag connector structure provided by another embodiment of the present application;

[0067] Fig.36 It is a schematic diagram of a peritoneal dialysis three-way connector connected to a transmission tube through a cuff provided by another embodiment of the present application;

[0068] Fig.37 This is a schematic diagram of a peritoneal dialysis three-way connector connected to a transmission tube through a cuff provided by another embodiment of the present application;

[0069] Fig.38 yes Fig.37 A partial enlarged view of

[0070] Fig.39 This is a schematic diagram of a peritoneal dialysis three-way connector connected to a transmission tube through a cuff provided by another embodiment of the present application;

[0071] Fig.40 This is a schematic diagram of a peritoneal dialysis three-way connector connected to a transmission tube through a cuff provided by another embodiment of the present application;

[0072] Fig.41 This is a schematic diagram of a peritoneal dialysis three-way connector connected to a transmission tube through a cuff provided by another embodiment of the present application;

[0073] Figure 42-Figure 44It is a schematic diagram of the structure of a disposable drainage bag provided in other embodiments of the present application in combination with different cuffs. DETAILED DESCRIPTION

[0074] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0075] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0076] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0077] like Figures 1 to 17 , Fig. 20 As shown, one embodiment of the present application provides a disposable drainage bag, which is specifically a disposable peritoneal dialysis drainage bag, including: a first bag body 6, a transmission component 50. The first bag body 6 is used to collect the fluid discharged during the peritoneal dialysis process. Specifically, the first bag body 6 can be used as a waste liquid bag to collect waste liquid or body fluid output from the human peritoneal cavity to the outside of the body during peritoneal dialysis.

[0078] Of course, in other embodiments, the following may also be provided: Fig.18 , Fig.19 The disposable drainage bag shown is used to discharge urine, wound drainage, bleeding or accumulated fluid. Its liquid storage bag 6 can also be called a waste liquid bag. It is in an empty and flat state before use. When in use, the drainage fluid is drained into the liquid storage bag 6 for storage.

[0079] like Figure 1 As shown, the transmission assembly 50 includes a first transmission tube 3, a second transmission tube 4, a protective cap 8 and a peritoneal dialysis three-way connector 10. Figures 2 to 8 As shown, the peritoneal dialysis three-way connector 10 has a dialysis Luer connector 15, a liquid inlet connector 12, and a liquid outlet connector 11. The protective cap 8 is detachably covered on the dialysis Luer connector 15. The protective cap 8 is a flexible protective cap 8 made of non-PVC material, which covers the dialysis Luer connector 15 to prevent the dialysis Luer connector 15 from being contaminated. The protective cap 8 has a pull ring, and the user can pull the protective cap 8 off the peritoneal dialysis three-way connector 10 with the pull ring. The dialysis Luer connector 15 is used to connect the peritoneal dialysis external tube (peritoneal dialysis external tube). The peritoneal dialysis external tube is used to connect the transmission component 50 and the peritoneal catheter outside the body to prevent or allow the flow of peritoneal dialysis fluid or waste fluid. The peritoneal dialysis external tube is connected to the dialysis Luer connector 15 in a male and female Luer connector manner.

[0080] The disposable peritoneal dialysis drainage bag can form a peritoneal dialysis set with the second bag body 20. The second bag body 20 is a solution bag, which can also be called a drug solution bag, and contains peritoneal dialysis drug solution, and the whole is a rectangular bag structure. The second bag body 20 has a second bag connection end 25; the first transmission tube 3 of the disposable peritoneal dialysis drainage bag of this embodiment is connected to the second bag connection end 25.

[0081] In this embodiment, the transmission tubes (first transmission tube 3, second transmission tube 4) of the disposable peritoneal dialysis drainage bag are made of non-PVC material. Specifically, the first transmission tube 3 and the second transmission tube 4 are transmission conduits, which are also transmission hoses. One end of the first transmission tube 3 is fixedly connected to the liquid inlet connector 12, and the other end is used to connect to the second bag body 20 containing the dialysis solution. The second transmission tube 4 is fixedly connected to the liquid outlet connector 11 and the first bag body 6. The material of the transmission tube includes a base material and an elastic material; the weight percentage of the base material and the elastic material is more than 50%; the base material is PP or PE.

[0082] like Figure 1 , Figure 2 As shown, the first bag body 6 includes a liquid storage bag and a drainage bag connector 5 fixedly connected to one end of the liquid storage bag. One end of the liquid storage bag connected to the drainage bag connector 5 is a bag connection end 61. The drainage bag connector 5 is an injection molded one-piece structure. The drainage bag connector 5 is made of non-PVC material. The material of the drainage bag connector 5 can be similar to or the same as the material of the peritoneal dialysis three-way connector 10. Specifically, the material of the drainage bag connector 5 includes a base material and an elastic material. Among them, the base material and the elastic material are the main component materials of the drainage bag connector 5, and the weight percentage of the base material and the elastic material is more than 50%; the base material is PP or PE. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS. Specifically, the drainage bag connector is made of PP material.

[0083] In this embodiment, the drainage bag connector 5 is connected to the center of the bag connection end 61. The first bag body 6 has a bag connection end 61 welded and fixed to the second connection end 502. The drainage bag connector 5 is fixedly connected to the second transmission tube 4. The tube end of the second transmission tube 4 is non-adhesively fitted outside the drainage bag connector 5. The non-adhesive fixed connection method can use a machine to cold-push the tube end into the outside of the connector, without manual pushing and applying glue, thereby improving manufacturing efficiency.

[0084] It has been verified that the existing manual glue-spreading and squeezing manufacturing method has an approximate efficiency of about 2,500 pieces per worker every 8 hours, while the mechanical automatic cold-insertion manufacturing method of this embodiment can produce more than 9,000 pieces per worker every 8 hours, and the connection efficiency between the connector and the transmission conduit is increased by more than 3 times, which can significantly improve the manufacturing efficiency.

[0085] like Figures 3 to 6 As shown, the drainage bag connector 5 extends along its length direction H; the drainage bag connector 5 has a second connection end 502 connected to the second transmission tube 4 and a first connection end 501 connected to the first bag body 6. The drainage bag connector 5 in this embodiment has the same main material as the second transmission tube 4, so that when the two are connected, they can form a fitting sealing structure due to the similar materials to avoid connection leakage. The second connection end 502 is provided with at least one vertical step 54 facing the first connection end 501. The vertical step 54 is fixedly sleeved inside the second transmission tube 4.

[0086] like Figure 3 As shown, the second connection end 502 is provided with a reduced diameter portion 56 and an expanded portion 55. The reduced diameter portion 56 is located on a side of the expanded portion 55 close to the first connection end 501, and the annular interface between the reduced diameter portion 56 and the expanded portion 55 forms a vertical step 54. Fig. 9 , Fig.10 As shown, relying on the structure of the vertical step 54, the reduced diameter portion 56 and the expansion portion 55, the tube end 41 of the second transmission tube 4 is non-adhesively attached to the outside of the second connection end 502 of the drainage bag connector 5. The outer diameter of the reduced diameter portion 56 is larger than the inner diameter of the second transmission tube 4. Furthermore, when the tube end 41 of the second transmission tube 4 is retracted corresponding to the first sleeve portion 412 of the reduced diameter portion 56, it is still in a state of being expanded by the reduced diameter portion 56, and is in close contact with the outer wall of the reduced diameter portion 56 (non-adhesive attachment), thereby improving the connection strength and ensuring the sealing performance.

[0087] Specifically, the width of the vertical step 54 is between 1 and 20 mm. Through the vertical step 54, a hooking structure can be formed for the tube end 41 of the second transmission tube 4. The second transmission tube 4 shrinks and changes diameter when it passes through the vertical step 54 and recovers elastically, and then the vertical step 54 hooks the second transmission tube 4, forming a stop for the second transmission tube 4. Fig. 9 , Fig.10 As shown, the stability of the connection is ensured by forming a physical hooking structure based on the close connection between the two.

[0088] The outer edge of the end of the drainage bag connector 5 also has an end chamfer 551 to reduce the outer diameter of the end to be smaller than the inner diameter of the second transmission tube 4. The diameter at the port of the end chamfer 551 is smaller than the inner diameter of the second transmission tube 4. In this way, when squeezing and pushing, the end of the drainage bag connector 5 is conveniently inserted into the tube end 41 of the second transmission tube 4 by relying on the end chamfer 551, and the tube end 41 of the second transmission tube 4 is gradually pushed in to expand. Of course, the outermost (facing Figure 3 The expansion portion 55 (which is the lowest when the second transmission pipe 4 is in the middle) is preferably a conical structure to facilitate squeezing in and expanding the pipe end 41 of the second transmission pipe 4.

[0089] The connection length between the tube end 41 of the second transmission tube 4 and the second connection end 502 is greater than the length of the expansion part 55. Specifically, the connection length between the tube end 41 of the second transmission tube 4 and the second connection end 502 is 5 mm to 30 mm. When the second transmission tube 4 is connected to the drainage bag connector 5, the expansion part 55 is sleeved in the tube end 41 of the second transmission tube 4. The tube end 41 of the second transmission tube 4 is connected to the first connection end 501 by cold plugging.

[0090] like Fig. 9 As shown, the pipe end 41 of the second transmission pipe 4 mainly includes a first sleeve portion 412 sleeved outside the reduced diameter portion 56 and a second sleeve portion 411 sleeved on the expansion portion 55, wherein the inner diameter of the first sleeve portion 412 is larger than the inner diameter of the second transmission pipe 4 (non-pipe end portion), that is, the first sleeve portion 412 is still in a state of being enlarged by the reduced diameter portion 56 to ensure that the two are tightly sealed. The second sleeve portion 411 is sleeved outside the expansion portion 55 and is tightly attached to the outer wall of the expansion portion 55.

[0091] In order to form an effective physical hooking structure, the length of the reduced diameter portion 56 is greater than one third of the inner diameter of the second transmission tube 4, that is, L ≥ D / 3, where L is the length of the reduced diameter portion 56 and D is the inner diameter of the second transmission tube 4 (in a natural state without sleeves). For example, when the inner diameter of the second transmission tube 4 is 6 mm, the length of the reduced diameter portion 56 is greater than 2 mm.

[0092] The expansion portion 55 is a cylindrical or conical structure. Fig.10 As shown, the drainage bag connector 5 may have a plurality of vertical steps 54 to form a multi-level hooking structure to ensure the connection strength between the second transmission tube 4 and the corresponding drainage bag connector 5. Furthermore, the expansion part 55 is provided with 1, 2, or 3, and the reduction part 56 is provided with 1, 2, or 3. Fig.10In the illustrated embodiment, there are two vertical steps 54 (54a, 54b), two expansion parts 55 (55a, 55b), and two reduced diameter parts 56 (56a, 56b), and the second transmission tube 4 is sleeved on the vertical steps 54 (54a, 54b), the expansion parts 55 (55a, 55b), and the reduced diameter parts 56 (56a, 56b) to form a secondary hooking structure.

[0093] In the existing connection process that lacks the wing structure 52, it is easy to produce seam gaps when the two bag film layers 611 are connected on both sides of the joint of the single tube body, especially at the connection position of the bag film layers 611, which leads to a higher defective rate. This requires that the welding position of the joint of the single tube structure is very precise to avoid the generation of seam gaps and ensure that the two bag film layers 611 and the single tube form a complete circular sealing structure.

[0094] like Figure 1 , Figure 3 , Figure 7 , Figure 8 As shown, the drainage bag connector 5 includes a main body tube 51 and a wing structure 52 arranged on the side wall of the main body tube 51. The wing structure 52 is integrally arranged on the main body tube 51, and is integrally formed with the main body tube 51 by injection molding. The bag connection end 61 has a relatively connected bag opening film layer 611. The main body tube 51 and the wing structure 52 are fixedly clamped between two bag opening film layers 611a and 611b. The wing structure 52 is laid flat between the two bag opening film layers 611a and 611b. The wing structure 52 extends in a radial direction. The wing structure is laid flat between the two bag opening film layers 611 so that the two bag opening film layers 611 are distributed on both sides of the wing structure 52 in a mirror-symmetrical manner, thereby ensuring the welding sealing quality.

[0095] In order to form a better connection quality, the connecting sheet 521 has two opposite welding planes 527. When the wing structure 52 is laid flat between the two bag film layers 611a and 611b, the bag film layer 611 can be directly attached to the welding plane 527, and the two melt during welding to form a connecting weld. The connecting sheet 521 provides a welding plane 527 instead of an uneven welding surface. This can adapt to the thin sheet characteristics of the connecting sheet 521 itself. It can be directly fused with the bag film layer 611 by attaching during the welding process, and it is easy to manufacture. The welding plane 527 can be as follows: Figure 5 The inclined plane shown can also be Figure 5 The vertical plane shown.

[0096] The bag connection end 61 and the first connection end 501 of the drainage bag connector 5 can be welded by power frequency pulse welding (also known as power frequency heating welding). With the presence of the wing structure 52, the drainage bag connector 5 is located between the two bag opening film layers 611 and then welded once to achieve the sealing of the first bag body 6 and the fixed connection between the first bag body 6 and the drainage bag connector 5, and the sealing strip 65 for sealing the bag connection end 61 is formed by welding.

[0097] like Figure 7 , Figure 8 As shown, the wing structure 52 is partially melted and integrated with the film layer during welding, and the wing structure 52 has a fusion portion 525 fused with the bag opening film layer 611. The wing structure 52 ( Figure 8 Compared with the wing structure 52 ( Figure 8 The area or radial length of the connecting sheet 5212 in the bag body is reduced. During the welding process, the wing structure 52 loses part of its area, and the lost area of ​​the wing structure 52 is melted with the bag opening film layer 611 to form an integrated structure, which not only improves the connection area between the first bag body 6 and the drainage bag connector 5 as a whole, but also ensures the bonding strength between the two, ensures the connection stability between the drainage bag connector 5 and the first bag body 6, and does not cause the problem of falling off. Figure 8 It can be seen from the diagram that the area or radial length of the connection sheet 5211 retained after welding is reduced compared to the connection sheet 5212 in the unconnected state.

[0098] The drainage bag connector 5 of this embodiment is provided with a wing structure 52, and the two bag opening film layers 611a and 611b are covered on the main body tube 51 and span the main body tube 51, and the two sides of the main body tube 51 are covered on the wing structure 52. Even if there is a docking gap between the two bag opening film layers 611a and 611b, the corresponding docking gap can be filled by the existence of the wing structure 52. Of course, because of the existence of the wing structure 52, the two bag opening film layers 611 do not need to be tightly docked on one side of the main body tube 51, and they can be welded by keeping them close to the surface of the wing structure 52. In this way, the docking position requirements for the entire drainage bag connector 5 are lower, and a higher yield can be obtained, and correspondingly, the welding and sealing quality is higher.

[0099] In this embodiment, the wing structure 52 includes connecting sheets 521 (521a, 521b) distributed on both sides of the main body tube 51, and the connecting sheets 521 are in a sheet structure. In the non-assembled state, the connecting sheets 521a and 521b are symmetrically distributed on both sides of the main body tube 51. The thickness of the connecting sheet 521 is 0.01-1.5 mm, and the length along the radial direction is 1-10 mm. The length L1 of the connecting sheet 521 along the length direction H of the main body tube is 1-10 mm, and preferably, the length L1 is 3-8 mm. Among them, there can be more than 2 connecting sheets 521, which are symmetrically distributed. The main body tube 51 is provided with two or more wing structures 52 along its length direction H. Preferably, the connecting sheets 521 of the two wing structures 52 have the same shape. The connecting sheet 521 has an inner end connected to the main body tube 51 and an outer end away from the main body tube 51 . To fill the joint gap of the bag opening film layer 611 , the thickness of the connecting sheet 521 gradually decreases from the inner end to the outer end.

[0100] There are many shapes of the connecting sheet 521. In this embodiment, the shape of the connecting sheet (longitudinal section, Figure 3 The cross-section in the view shown is rectangular. Figure 6 In the embodiments a, b, c, and d, the outer edge of the connecting sheet 521 may be serrated. In this case, the outer end of the connecting sheet 521 is provided with convex portions and concave portions arranged alternately along the length direction H of the main body tube. The convex portions and concave portions may be arranged alternately at equal intervals or irregularly. Each convex portion and concave portion may be the same or different. Of course, as a preferred embodiment, the convex portions and concave portions are of the same shape. Similarly, the cross-sectional shapes of the connecting sheets 521 of different wing structures 52 may also be different, such as Figure 5 As shown, the cross-section of the connecting sheet 521 is a triangular spike shape, a rectangle, an irregular shape, etc., and the present application does not impose any limitation thereto.

[0101] It is considered that if the smooth main body tube is directly welded to the bag connection end 61, part of the outer wall of the main body tube will melt during the welding process and merge with the bag mouth film layer 611 of the bag connection end 61, and the melted part of the main body tube material will easily overflow to form unexpected protruding foreign matter, which will affect the welding quality on the inner side of the bag mouth film layer 611 and cause poor sealing.

[0102] like Figure 3As shown, in order to ensure the connection quality between the first connection end 501 and the bag connection end 61, the first connection end 501 is further provided with a connection protrusion 58 on the outer wall of the main body tube 51, and the connection protrusion 58 protrudes from the outer wall surface of the main body tube 51. The width W2 of the connection protrusion 58 along the length direction H of the main body tube is 0.5mm-2mm. The height of the connection protrusion 58 protruding from the outer wall surface of the main body tube 51 is 0.05mm-1mm. The connection protrusion 58 is distributed between the connection sheets 521 on both sides of the main body tube 51, and one end of the connection protrusion 58 extends continuously from one connection sheet 521a to another connection sheet 521b. With the connection sheet 521 as the symmetrical interface, the connection protrusion 58 is distributed on both sides of the connection sheet 521 in mirror symmetry.

[0103] Specifically, the outer wall area of ​​the main body tube 51 corresponding to the wing structure 52 is the connecting portion, and the length of the connecting portion along the length direction H is equal to the length of the wing structure 52 along the length direction H, both of which are L1. Two or more connecting protrusions 58 are arranged and distributed on the connecting portion along the length direction H, and the interval between two adjacent connecting protrusions 58 is 0.5mm to 2mm. A filling groove is formed between two adjacent connecting protrusions 58. Among the multiple connecting protrusions 58, one connecting protrusion 58 is aligned with one side edge of the connecting sheet 521, and the other connecting protrusion 58 is aligned with the other side edge of the connecting sheet 521. In an embodiment in which multiple wing structures 52 are provided on the main body tube 51, as Figure 3 As shown, the main body tube 51 has two wing structures 52 (two pairs of connecting sheets 521 ), and correspondingly, the main body tube 51 has two connecting portions correspondingly provided with connecting protruding rings 58 .

[0104] By providing connecting convex rings 58 arranged at intervals and forming filling grooves 585 between the connecting convex rings 58, the connecting convex rings 58 are first melted and overflow to the sides to flow into the filling grooves 585 during the welding process. In this way, it is difficult to form protruding foreign objects at the connection part to affect the welding quality. The height of the connecting convex ring 58 is gradually reduced under high-temperature welding, and gradually becomes flush with the overflow filling grooves 585 to form a flat joining surface, which is welded and fused with the bag mouth film layer 611, thereby forming a connection structure with better welding quality. This connection structure can reduce the welding accuracy requirements for the drainage bag joint 5 and the welding head, provide a connection structure with better quality, and reduce the difficulty of processing and manufacturing technology.

[0105] like Figure 2 , Figure 3 As shown, the bag connection end 61 has at least one welding strip 570 for welding the bag opening film layer 611 relative to each other; the number of the wing structures 52 is equal to the number of the welding strips 570, and they are aligned one by one in the width direction of the first bag body 6. The welding strips 570 are formed from the first bag body 6 in the width (facing the first bag body 6) Figure 1The bag connection end 61 and the drainage bag connector 5 are welded to form the welding strip 570. The width W1 of the welding strip 570 in the length direction H of the main body tube 51 is equal to the length L1 of the connecting sheet 521. Of course, the two are also equal to the length of the connecting portion along the length direction H.

[0106] On the disposable drainage bag, after welding, the connecting protruding ring 58 is roughly flush with the filling groove 585, forming a welding surface that is roughly flat with the bag opening film layer, and then the welding strip 570 on the main body tube 51 is a continuous weld along the length direction H, and no interval welds are formed due to the spaced connecting protruding rings 58, forming a connection structure with excellent sealing performance on the small-sized drainage bag connector 5. Similarly, the welding strip 570 on the connecting sheet is also a continuous weld along the length direction H.

[0107] After further research by the inventors, it was found that the drainage bag connector 5 with a wing structure needs to be kept flat during manufacturing. In a non-flat state, defective products are easily produced, which places high demands on the assembly level of the manufacturing, and is not conducive to improving the manufacturing efficiency.

[0108] like Fig.35 As shown, in order to overcome the occurrence of such problems and taking into account the small joint gap, the inventor considered only using the flow filling effect of the melted connecting convex ring 58 to fill and seal it. So in this embodiment, the drainage bag connector 5 in this embodiment does not have a wing structure, and only retains the connecting convex ring 58. In this case, an effective sealing connection can still be formed, and there is no flattening requirement for the drainage bag connector 5 during manufacturing, thereby effectively improving manufacturing efficiency.

[0109] In this embodiment, at least one connecting portion 580 may be provided on the outer wall of the main body tube 51 of the drainage bag connector 5. The connecting portion 580 has two or more connecting protruding rings 58 arranged along the length direction. The connecting protruding ring 58 protrudes from the outer wall surface 5011 of the main body tube 51. A filling groove 585 is formed between two adjacent connecting protruding rings 58, wherein the width of the filling groove 585 along the length direction (that is, the interval width between two adjacent connecting protruding rings 58) is greater than the width of the connecting protruding ring 58, and preferably, the width of the filling groove 585 along the length direction is greater than 2 times the width W2 of the connecting protruding ring 58. The filling groove 585 extends continuously in the circumferential direction and is a circumferentially continuous annular groove. In the above-mentioned embodiment with a wing structure, the filling groove 585 is interrupted by the wing structure and is a discontinuous structure.

[0110] The drainage bag connector 5 of this embodiment does not have a wing structure, but relies on the connection convex ring 58 to melt into the butt joint gap formed when the two film layers are butt jointed during welding, so as to effectively seal and connect the drainage bag connector 5 and the bag connection end 61. The drainage bag connector 5 is welded and fused with the bag opening film layer 611, and the connection convex ring 58 can form a connection structure with better welding quality. This connection structure can reduce the welding accuracy requirements for the drainage bag connector 5 and the welding head, provide a connection structure with better quality, and reduce the difficulty of processing and manufacturing process.

[0111] In this embodiment, the width of the connecting protruding ring 58 itself is reduced, so that the connecting protruding ring 58 is easier to be welded and melted into the filling groove 585 to form a flat welding surface. The width W2 of the connecting protruding ring 58 along the length direction H of the main body tube 51 is 0.1mm to 1mm. Preferably, the width W2 of the connecting protruding ring 58 along the length direction H of the main body tube is 0.1mm to 0.5mm. The height of the connecting protruding ring 58 protruding from the outer wall surface 5011 of the main body tube 51 is 0.05mm to 1mm. The bottom wall 581 of the filling groove 585 can be higher than the outer wall of the first connecting end 501 to avoid affecting the thickness of the tube wall due to welding here, thereby ensuring the quality of the structure after welding.

[0112] like Fig.35 As shown, the first connection end 501 is provided with two spaced connection parts 580. The spacing distance W4 between two adjacent connection parts 580 is greater than the width W3 of the connection part 580 along the length direction. Each connection part 580 is provided with 3-10 connection protrusions 58. Each connection part 580 corresponds to the welding strip 570 one by one. The drainage bag connector 5 can be referenced to the drainage bag connector of the previous embodiment, and the same or repeated parts will not be repeated. Figure 42 to Figure 44 In the embodiment, the two connecting portions 80a, 580b correspond to the two welding strips 570a, 570b respectively.

[0113] The structure of the Luer tee connector currently used in peritoneal dialysis is that it needs to be connected to the peritoneal dialysis external tube by multiple plug-in and pull-out threads. In order to avoid wear or severe wear on the connector, PVC and TPEE are used to form the two parts of the Luer tee connector. On the one hand, the TPEE connector is used to connect to the peritoneal dialysis external tube multiple times to reduce wear and leakage and increase the service life of the peritoneal dialysis external tube. On the other hand, the PVC connector is used to reliably connect to the transmission catheter. In addition, the materials and manufacturing processes (such as power frequency welding and bonding) of the Luer tee connector with such a split structure are relatively mature, which also hinders the formation of its improved process to a certain extent.

[0114] like Figures 11 to 17As shown, compared with the above conventional designs, in this embodiment, the peritoneal dialysis three-way connector 10 is an integrated structure, not a split structure. The peritoneal dialysis three-way connector 10 having the dialysis Luer connector 15, the liquid inlet connector 12 and the liquid outlet connector 11 is an integral injection molded structure as a whole, and does not need to be manufactured separately and then assembled, which simplifies the assembly process and improves the manufacturing efficiency. In addition, there is no split connection part on the peritoneal dialysis three-way connector 10, and the structural strength itself is higher.

[0115] In the prior art, the split-structure PVC material tee is inserted into the dialysis Luer connector and then high-frequency welded to produce and assemble a single peritoneal dialysis tee connector, which takes about 1 piece / 7 seconds as a whole. However, the injection molding time of the peritoneal dialysis tee connector 10 using the structure of this embodiment is 4 pieces / 15 seconds. It can be seen that this embodiment can greatly improve the manufacturing efficiency, thereby saving manufacturing costs, and can reduce the manual assembly process, thereby improving the process manufacturing level.

[0116] In this embodiment, the material of the dialysis Luer connector 15 is the same as that of the liquid inlet connector 12 and the liquid outlet connector 11, both of which are non-PVC materials. Specifically, the material of the dialysis Luer connector 15 includes a base material and an elastic material; the weight percentage of the base material and the elastic material is more than 50%; the base material is PP or PE. Specifically, the dialysis Luer connector 15 is made of TPEE.

[0117] The material of the peritoneal dialysis three-way connector 10 of the present embodiment includes a base material and an elastic material; the weight percentage of the base material and the elastic material is more than 50%; the base material is PP or PE or TPEE. Further, the weight percentage of the base material and the elastic material may be between 50% and 97%. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS. In this way, the main materials of the peritoneal dialysis three-way connector 10 and the transmission tube in the present embodiment are both base material and elastic material. After the two are fitted together, they can form a fitting sealing structure due to the similar materials, which not only facilitates the connection between the two but also can avoid connection leakage. Specifically, the peritoneal dialysis three-way connector 10 is made of TPEE material.

[0118] Compared with the traditional PVC material, the peritoneal dialysis three-way connector 10 or the transmission catheter material in the present application is more environmentally friendly. The PVC pipe material will produce toxic substances when burned, and can only be degraded by landfill. However, the peritoneal dialysis three-way connector 10 or the transmission catheter material in the embodiment of the present application can be burned, and it is not easy to produce harmful substances during the burning process.

[0119] In the peritoneal dialysis three-way connector 10, at least the dialysis Luer connector 15 is made of a transparent material or a translucent material. Considering that the material of the entire peritoneal dialysis three-way connector 10 is consistent as a whole, it is made of a transparent material or a translucent material (similar to a frosted glass effect), and thus during the peritoneal dialysis process, the flow of liquid can be observed through the peritoneal dialysis three-way connector 10, which facilitates the operation of the corresponding peritoneal dialysis external tube, reduces the probability of operating errors, and improves the user experience.

[0120] In this embodiment, the peritoneal dialysis three-way connector 10 is an integral structure, which includes a main pipe section 13 extending along the longitudinal direction (length direction F1). The main pipe section 13 is the main part of the peritoneal dialysis three-way connector 10, and the dialysis Luer connector 15, the liquid inlet connector 12 and the liquid outlet connector 11 are arranged on the main pipe section 13 to form the peritoneal dialysis three-way connector 10 with a three-way structure. The main pipe section 13 and the dialysis Luer connector 15, the liquid inlet connector 12 and the liquid outlet connector 11 are an injection-molded integral structure.

[0121] like Fig.11 , Fig.12 , Fig.13 , Fig.14 As shown, the dialysis Luer connector 15 is arranged at one end of the main pipe section 13 in the length direction F1; the liquid inlet connector 12 and the liquid outlet connector 11 are arranged at the other end of the main pipe section 13. An end flange plate 16 is provided at one end of the main pipe section 13, and the dialysis Luer connector 15 is located on the side of the end flange plate 16 away from the main pipe section 13. The side wall of the main pipe section 13 is provided with a wing plate 14. The wing plates 14 are distributed on both sides of the main pipe section 13, which is convenient for the user to apply force to produce relative rotation with the peritoneal dialysis external tube for assembly. The angle between the liquid inlet connector 12 and the liquid outlet connector 11 is an acute angle or a right angle. Preferably, the angle between the liquid inlet connector 12 and the liquid outlet connector 11 is set at an acute angle.

[0122] In this embodiment, the liquid outlet connector 11 is coaxially arranged with the main pipe segment 13, and is located on the extension line of the main pipe segment 13, and can constitute the same straight pipe segment with the main pipe segment 13. Similarly, the dialysis Luer connector 15 is located at the other end of the main pipe segment 13, and the dialysis Luer connector 15 and the liquid outlet connector 11 are respectively located at the two ends of the main pipe segment 13, forming a coaxial straight pipe structure.

[0123] like Figures 11 to 14 As shown, the dialysis Luer connector 15 includes an outer tube sleeve 150 and an inner connector 17 coaxially located in the outer tube sleeve 150. The outer tube sleeve 150 and the inner connector 17 are also injection molded structures and form a Luer connector structure. Among them, the dialysis Luer connector 15 is a female Luer connector, which is matched and connected with the male Luer connector of the peritoneal dialysis external tube.

[0124] Specifically, the outer tube sleeve 150 has an outer diameter greater than the outer diameter of the main tube section 13, and includes a plain wall section 151 and a connecting section 152 located on the side of the plain wall section 151 close to the main tube section 13. The inner wall of the plain wall section 151 is a smooth wall surface, which facilitates the insertion of the male Luer connector of the peritoneal dialysis external tube, and the connecting section 152 is located on the inner side of the plain wall section 151, and the inner wall of the connecting section 152 is provided with a thread, which cooperates with the inner connector 17 to form a Luer structure, and then is threadedly connected with the male Luer connector of the peritoneal dialysis external tube.

[0125] In order to facilitate the connection with the peritoneal dialysis external tube and avoid the wear and damage to the peritoneal dialysis external tube caused by multiple connections, the material of the outer tube sleeve 150 mainly includes a base material and an elastic material, which is flexible as a whole and has a certain elastic modulus. In order to adapt to the connection of the peritoneal dialysis external tube, the tube wall thickness of the outer tube sleeve 150 is 0.1-3mm, and the hardness of the outer tube sleeve 150 is 30-60 ShoreD. The outer tube sleeve 150 with such hardness and tube wall thickness can reduce the wear of the peritoneal dialysis external tube when connected to the peritoneal dialysis external tube, thereby ensuring the service life of the peritoneal dialysis external tube.

[0126] Optionally, in order to improve the sealing performance and avoid leakage, a sealing step 155 is further provided in the outer tube sleeve 150. The sealing step 155 is located on the inner wall of the plain wall section 151. In this way, the inner wall of the outer tube sleeve 150 forms a stepped hole structure, which is connected with the corresponding structure of the male Luer connector of the peritoneal dialysis external tube through the sealing step 155 to form a fitting seal. Of course, the end of the connecting section 152 is also formed with an end step, and the sealing step 155 is on the outside of the end step (the side away from the liquid outlet connector 11). The inner diameter of the connecting section 152 is reduced to a certain extent relative to the inner diameter of the plain wall section 151, and then an internal thread is provided on the connecting section 152 to avoid reducing the thickness of the connecting wall and ensure the connection strength.

[0127] In this embodiment, the tube end of the first transmission tube 3 is non-adhesively fitted outside the liquid inlet joint 12. The tube end of the second transmission tube 4 is non-adhesively fitted outside the liquid outlet joint 11. The tube ends of the transmission tubes themselves are butt-extruded by cold pushing (non-heating state, for example: room temperature state) to expand the tube ends, and then the liquid inlet joint 12 and the liquid outlet joint 11 are respectively inserted into the corresponding first transmission tube 3 and second transmission tube 4. The tube ends of the first transmission tube 3 and the second transmission tube 4 rely on their own elastic retraction performance to tightly adhere to the outer walls of the internally sleeved liquid inlet joint 12 and liquid outlet joint 11 to form a seal.

[0128] The first transmission tube 3 and the second transmission tube 4 of this embodiment are connected with the liquid inlet joint 12 and the liquid outlet joint 11, and there is no need to heat them to soften them before docking and inserting them. Therefore, the first transmission tube 3 and the second transmission tube 4 of this embodiment are non-adhesive fit with the liquid inlet joint 12 and the liquid outlet joint 11, and the heated pipe end and the joint will form a certain adhesion after fitting. The pipe end connection structure of this embodiment does not produce it, and it relies on elastic retraction to form a seal with the outer wall of the internally sleeved liquid inlet joint 12 and the liquid outlet joint 11. When the pipe end joint connection structure is longitudinally cut open, there is no adhesive layer between the two, and they are in a physically close state. The non-adhesive fixed connection method can use a machine to cold-push the pipe end into the outside of the joint without manual pushing, thereby improving manufacturing efficiency.

[0129] The ends of the first transmission tube 3 and the second transmission tube 4 are sleeved on the liquid inlet joint 12 and the liquid outlet joint 11 by deformation; the deformation mainly includes elastic deformation. Of course, the ends of the first transmission tube 3 and the second transmission tube 4 may also have a certain degree of plastic deformation, which is not limited in the present application. After the first transmission tube 3 or the second transmission tube 4 is pulled out and separated from the liquid inlet joint 12 or the liquid outlet joint 11, the ends of the first transmission tube 3 or the second transmission tube 4 can restore their shapes to a certain extent.

[0130] like Figures 14 to 17 As shown, in order to improve the connection strength between the first transmission pipe 3, the second transmission pipe 4 and the corresponding liquid inlet joint 12, the liquid outlet joint 11, at least one of the liquid inlet joint 12 and the liquid outlet joint 11 is provided with at least one connection step 113 facing the main pipe section 13. The connection step 113 is fixedly sleeved inside the transmission pipe. The width of the connection step 113 is between 1 and 20 mm.

[0131] The connecting step 113 can form a hooking structure for the end of the transmission pipe. The transmission pipe (the first transmission pipe 3 or the second transmission pipe 4) shrinks and changes diameter when passing through the connecting step 113 under the condition of self-elastic recovery, and then the connecting step 113 hooks the transmission pipe, forming a stop for the transmission pipe. Fig.15 As shown, the stability of the connection is ensured by forming a physical hooking structure on the basis of the close connection between the two. The outer edges of the ends of the liquid inlet connector 12 and the liquid outlet connector 11 have chamfered ends 119 to reduce the outer diameter of the ends to be smaller than the inner diameter of the transmission tube (the first transmission tube 3, the second transmission tube 4). The diameter at the port of the chamfered end 119 is smaller than the inner diameter of the transmission tube (the first transmission tube 3, the second transmission tube 4). This makes it convenient to insert the ends of the liquid inlet connector 12 and the liquid outlet connector 11 into the tube ends of the transmission tubes when squeezing and pushing, and gradually push in to expand the tube ends of the transmission tubes. Of course, the outermost (facing Figure 4 The expansion section 111 (which is the lowest when the transmission pipe is in the upper part) may be a conical structure to facilitate squeezing in and expanding the end of the transmission pipe.

[0132] Specifically, at least one of the liquid inlet joint 12 and the liquid outlet joint 11 is provided with a reduced diameter section 112 and an expanded section 111. The annular interface between the reduced diameter section 112 and the expanded section 111 forms the connecting step 113. The reduced diameter section 112 is located on the side of the expanded section 111 close to the main pipe section 13. The outer diameter of the reduced diameter section 112 is larger than the inner diameter of any of the first transmission pipe 3 and the second transmission pipe 4. Furthermore, when the pipe end of the transmission pipe is retracted corresponding to the first part 36 of the reduced diameter section 112, it is still in a state of being expanded by the reduced diameter section 112, and is in close contact with the outer wall of the reduced diameter section 112 (non-adhesive contact), thereby improving the connection strength and ensuring the sealing performance.

[0133] like Fig.15 As shown, the pipe end of the transmission pipe mainly includes a first part 36 sleeved outside the diameter reduction section 112 and a second part 35 sleeved on the expansion section 111, wherein the inner diameter of the first part 36 is larger than the inner diameter of the transmission pipe (non-pipe end part), that is, the first part 36 is still in a state of being enlarged by the diameter reduction section 112 to ensure that the two are tightly sealed. The second part 35 is sleeved outside the expansion section and is tightly attached to the outer wall of the expansion section.

[0134] In order to form an effective physical hooking structure, the length of the reduced diameter section 112 is greater than one third of the inner diameter of the first transmission tube 3 or the second transmission tube 4, that is, L ≥ D / 3, where L is the length of the reduced diameter section 112 and D is the inner diameter of the first transmission tube 3 or the second transmission tube 4. For example, when the inner diameter of the first transmission tube 3 is 6 mm, the length of the reduced diameter section 112 is greater than 2 mm.

[0135] The expansion section 111 is a cylindrical or conical structure. Fig.16 , Fig.17 As shown, both the liquid inlet joint 12 and the liquid outlet joint 11 may have a plurality of connection steps 113 to form a multi-level physical hooking structure rather than a chemical connection method, so as to ensure the connection strength between the first transmission pipe 3, the second transmission pipe 4 and the corresponding liquid inlet joint 12 and the liquid outlet joint 11. Accordingly, the expansion section 111 (111a, 111b), the diameter reduction section 112 (112a, 112b), and the connection steps 113 (113a, 113b) may be provided in plurality. Preferably, the expansion section 111 is provided with 1, 2, or 3, and the diameter reduction section 112 is provided with 1, 2, or 3.

[0136] Of course, the structure of the second connecting end 502 in the above-mentioned embodiment and the structure of the liquid inlet connector 12 or the liquid outlet connector 11 can be combined with each other for reference; the connection method between the drainage bag connector 5 and the second transmission tube 4 can also be combined with the connection method between the liquid inlet connector 12 or the liquid outlet connector 11 and the first transmission tube 3 or the second transmission tube 4, and the descriptions of the reduced diameter portion 56 and the reduced diameter section 112, and the expansion portion 55 and the expansion section 111 can also be combined with each other for reference, and no further details will be given in this application.

[0137] like Figures 1 to 20 As shown, a drainage bag connector 5 is also provided in the embodiment of the present application. The drainage bag connector 5 is an injection-molded integral structure, and has a first connection end 501 and a second connection end 502 along its length direction; the second connection end 502 is used to fix the transmission catheter 30. The first connection end 501 is used to fix the liquid storage bag 6.

[0138] The first connecting end 501 includes a longitudinally extending main body tube 51 and a wing structure 52 integrally arranged on the outer side wall of the main body tube 51; the wing structure 52 includes connecting sheets 521 symmetrically arranged on both sides of the main body tube 51, and the connecting sheets 521 have two oppositely facing welding planes 527. The longitudinal extension direction is the length direction of the drainage bag connector 5.

[0139] The drainage bag connector 5 can be used to manufacture a disposable drainage bag. The disposable drainage bag is used to discharge urine, wound drainage fluid, bleeding or effusion, and its liquid storage bag 6 can also be called a waste liquid bag, which is in an empty flat state before use, and the drainage fluid is drained into the liquid storage bag 6 for storage during use.

[0140] This application also provides Fig.18 , Fig.19 The disposable drainage bag shown includes: a liquid storage bag 6, a drainage bag connector 5, and a transmission catheter 30. The liquid storage bag 6 is used to collect the drained drainage liquid. The first connection end 501 of the drainage bag connector 5 is fixedly connected to the liquid storage bag 6; one end of the transmission catheter 30 is connected to the connection connector 10, and the other end is fixedly sleeved outside the second connection end 502 of the drainage bag connector 5.

[0141] The connection connector 10 comprises a Luer connector, such as Figure 1 Female Luer connector as shown or Figure 2 Male Luer connector as shown. Figure 1 As shown, the connection joint can also be detachably covered with a protective cap 8. The protective cap 8 can be detachably covered on the dialysis Luer connector 15. The protective cap 8 is a flexible protective cap 8 made of non-PVC material, which covers the dialysis Luer connector 15 to prevent the connection joint from being contaminated. The protective cap 8 has a pull ring, and the user can pull the protective cap 8 off the connection joint 10 by means of the pull ring. The connection joint 10 can be used to connect a drainage tube.

[0142] In this embodiment, the transmission conduit 30 is made of non-PVC material, and a liquid stop clip 40 may be provided thereon. Specifically, the material of the transmission conduit 30 includes a base material and an elastic material; the weight percentage of the base material and the elastic material is more than 50%; the base material is PP or PE. Among them, the transmission conduit 30 is made of TPE material.

[0143] like Figure 1 , Figure 2 As shown, the disposable drainage bag includes a liquid storage bag 6 and a drainage bag connector 5 fixedly connected to one end of the liquid storage bag 6. One end of the liquid storage bag 6 connected to the drainage bag connector 5 is a bag connection end 61. The drainage bag connector 5 is an injection molded one-piece structure. The drainage bag connector 5 is made of non-PVC material. The material of the drainage bag connector 5 includes a base material and an elastic material. Among them, the base material and the elastic material are the main component materials of the drainage bag connector 5, and the weight percentage of the base material and the elastic material is more than 50%; the base material is PP or PE. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS.

[0144] like Figure 21 to Figure 27 In one embodiment of the present application, a drainage bag connector 5 is provided. The drainage bag connector 5 is an injection-molded integral structure, and has a first connection end and a second connection end along its length. The second connection end 502 is used to fix the connection to the transmission catheter 30 (such as the first transmission tube 3 or the second transmission tube 4). The first connection end 501 is used to fix the connection to the liquid storage bag 6. The drainage bag connector 5 can be formed with the transmission catheter 30 and the connection connector 10 as shown in FIG. Fig.21 The connection method between the drainage bag connector 5 and the bag connection end 61 of the disposable drainage bag shown can refer to the description in the above embodiment, which will not be repeated here. Of course, the disposable drainage bag can refer to the contents described in the above embodiment, and the repeated parts will not be repeated here.

[0145] The drainage bag connector 5 comprises a longitudinally extending main body tube 51 and a wing structure 52 integrally arranged on the outer side wall of the main body tube 51. The wing structure 52 comprises connecting sheets 521 symmetrically arranged on both sides of the main body tube 51, and the connecting sheets 521 have two opposite welding planes; the main body tube 51 is a straight tube, and the outer diameter of the main body tube 51 remains unchanged as it extends from the first connecting end 501 to the second connecting end 502.

[0146] The material of the main body tube 51 is similar to or the same as that of the transmission tube 30. The inner diameter of the main body tube 51 is larger than the inner diameter of the transmission tube 30. The outer diameter of the main body tube 51 is larger than the outer diameter of the transmission tube 30.

[0147] In this embodiment, the connecting sheet 521 is symmetrically arranged on the outer wall of the main body tube 51 of the straight tube structure, and the length of the connecting sheet 521 is greater than Figure 2 , Figure 3 The connection sheet 521 of the drainage bag connector is shown. Fig.21 , Fig. 22 As shown, the connecting sheet 521 extends continuously from at least one weld strip to another weld strip, and further, the connecting sheet 521 continuously spans all weld strips. To facilitate manufacturing and improve manufacturing efficiency, the connecting sheet 521 extends from one end of the main body tube 51 to the other end of the main body tube 51, and the length of the connecting sheet 521 is equal to that of the drainage bag connector 5 (or the main body tube 51). Of course, it can also be as Fig.30 As shown, the connection sheet 521 has a longer length and only needs to span across multiple weld strips, and does not need to be the same length as the main body tube 51 . For example, the length of the connection sheet 521 is more than 0.5 times the length of the main body tube 51 .

[0148] Specifically, the length of the connecting sheet 521 (the length in the length direction of the main tube 51) is greater than 0.02 mm, and can be between 0.02 mm and 20 mm, preferably between 5 mm and 15 mm. The thickness of the connecting sheet 521 is 0.05-2 mm.

[0149] Of course, the thickness and radial length (width) of the connecting sheet 521 may refer to the description in the above embodiment, and will not be repeated here.

[0150] One end of the transmission catheter 30 is connected to a connecting joint 10, and the other end is fixedly sleeved inside the second connecting end 502 of the drainage bag connector 5. One end of the transmission catheter 30 is fixedly bonded to the inside of the main body tube 51 of the drainage bag connector 5. The material of the drainage bag connector 5 and the transmission catheter 30 is similar or the same, so the two can be directly bonded after being sleeved, and the bonding quality is strong. The second connecting end 502 is heated to expand and soften, and then one end of the transmission catheter 30 is inserted into the second connecting end 502, and after cooling, it is bonded and fixed without the need for glue or adhesive. Of course, after one end of the transmission catheter 30 is inserted into the second connecting end 502, it can be heated again so that both are in a non-melting expanded and softened state and then naturally cooled.

[0151] In a preferred connection method, one end of the transmission conduit 30 and the second connection end 502 can be directly cold-plugged, and the outer diameter of the insertion end of the transmission conduit 30 is larger than the inner diameter of the second connection end 502, and the inner diameter of the second connection end 502 is smaller than the outer diameter of the insertion end of the transmission conduit 30. The inner diameter of the second connection end 502 is 1%-50% smaller than the outer diameter of the insertion end of the transmission conduit 30. After the second connection end 502 is expanded and inserted into one end (insertion end) of the transmission conduit 30, after the second connection end 502 is released, the second connection end 502 shrinks and fits with the transmission conduit 30. The two materials are similar or the same, and a firm connection relationship is formed when they fit together. By cold plugging, the insertion end of the transmission conduit 30 is non-adhesively fitted inside the second connection end 502.

[0152] The cold plug connection between the transmission catheter 30 and the second connection end 502 is applied to the above-mentioned drainage bag connector 5 and the second transmission tube 4. It can be understood that: at this time, the second connection end 502 is fixedly connected to the second transmission tube 4; the first connection end 501 is fixedly connected to the liquid storage bag; wherein, the second connection end 502 is non-adhesively sleeved outside one end of the second transmission tube 4. To ensure the connection effect, the outer diameter of the second transmission tube 4 is larger than the inner diameter of the second connection end 502. Specifically, the outer diameter of the second transmission tube 4 is larger than the inner diameter of the second connection end 502 by 1%-50%, that is, the outer diameter of the second transmission tube 4 is 1.01 to 1.5 times the inner diameter of the second connection end 502. The drainage bag connector 5 is an integral injection molding structure, and the material of the drainage bag connector 5 is the same as that of the second transmission tube 4. One end of the second transmission tube 4 is inserted into the second connection end 502 by cold plugging. The length of the second transmission tube 4 inserted into the second connection end 502 is 2mm to 30mm. The length of the second transmission tube 4 inserted into the second connection end 502 is one third to four times the inner diameter of the second transmission tube 4 .

[0153] After further research, it was found that the hook structure connecting the above-mentioned joint and the transmission tube can be used in an ethylene oxide sterilization environment without causing sealing failure problems. However, after the high-temperature sterilization process, due to the different materials of the joint and the transmission tube (transmission conduit), the expansion properties of the two are different at high temperatures and the retraction properties are different after cooling, which leads to the destruction of the hook strength of the hook structure between the joint and the transmission tube. Another problem is that the fit seal between the two is destroyed, which leads to a decrease in yield after the sterilization process.

[0154] To solve the above problems, see Figure 21 to Figure 29 An embodiment of the present application further provides a connecting joint 10, the improved structure of which can be applied to the drainage bag joint 5, the three-way joint 10, or the Fig.29In the Luer connector shown, of course, any hook structure between the connector and the transmission tube can adopt the improved structure of this embodiment.

[0155] In this embodiment, the connection joint 10 has a joint body and a connection ring 80 arranged on the joint body. The joint body is provided with a reduced diameter section 112 (or reduced diameter portion) and an expanded section 111 (or expanded portion). The annular interface between the reduced diameter section 112 and the expanded section 111 forms the connection step 113 (or vertical step). The joint body can be the drainage bag joint 5, the three-way joint 10, or the Fig.29 Luer connector as shown, or Fig.18 as well as Fig.19 In the connecting joint, correspondingly, the connecting ring 80 can be applied to the joint of the above-mentioned embodiment as an improved structure.

[0156] A connecting ring 80 is fixedly sleeved outside the diameter-reducing section 112. The connecting ring 80 is sealed with the outer wall of the diameter-reducing section 112. The connecting ring 80 is sleeved on the outer wall of the diameter-reducing section 112 in an elastically shrinkable manner to seal the two. Furthermore, in order to prevent the connecting ring 80 from shifting during the cold insertion of the joint, a stop structure is fixedly provided outside the diameter-reducing section 112. The connecting ring 80 is sleeved on the outside of the diameter-reducing section 112 between the stop structure and the connecting step 113 in an elastically shrinkable manner. Fig.34 As shown, the stop structure is used to avoid the problem of poor connection effect caused by the connection ring 80 retreating during the cold plugging process.

[0157] The stopper structure is a protruding structure fixedly connected to the outer wall of the reduced diameter section 112, which can be a single protruding block structure, or a plurality of circumferentially spaced protruding blocks, or a protruding ring structure. The stopper ring 77 is made of the same material as the connector body, and can be the connector body structure itself. Fig.31 As shown, the stop structure includes a stop ring 77 that is integrally molded with the connector body. The outer diameter of the stop ring 77 is less than or equal to the outer diameter of the connecting ring. The stop ring 77 is located approximately in the middle of the reduced diameter section, thereby leaving enough length for the transmission tube to be sleeved. The stop ring 77 is applied to the connector in the above embodiment, and its structure is as follows: Fig.31 , Fig.32 , Fig.33 shown.

[0158] In addition, in a feasible embodiment, the connecting ring 80 can be directly injection-molded outside the diameter-reducing section 112 . In this case, there is no need to provide a stop structure, and the connecting ring 80 is sealed and connected to the outer wall of the diameter-reducing section 112 .

[0159] The material of the connecting ring 80 is different from that of the connector (main body), that is, the material of the connecting ring 80 is different from that of the drainage bag connector 5 and the three-way connector 10. The material of the connecting ring 80 is similar to or the same as that of the transmission tube (transmission conduit 30). The connecting ring 80 is arranged at the outer end of the reduced diameter section 112, close to the connecting step 113. The outer diameter of the connecting ring 80 is greater than or equal to the outer diameter of the expansion section 111, and the outer diameter of the connecting ring 80 is greater than or equal to the outer diameter of the connecting step 113. Preferably, the outer diameter of the connecting ring 80 is greater than the outer diameter of the connecting step 113 (or the expansion section 111) by more than 0.1 mm. For example, the outer diameter of the connecting ring 80 is greater than the outer diameter of the connecting step 113 (or the expansion section 111) by 0.1 mm to 2 mm, and then after high-temperature sterilization, the sealing fit with the transmission conduit 30 and the stability of the hooking structure can be maintained through the protruding connecting ring 80.

[0160] In this embodiment, the elastic modulus of the connecting ring 80 is greater than that of the connector body, so that after high-temperature sterilization, it can provide sufficient expansion to fit and seal with the inner wall of the transmission conduit 30. The length of the connecting ring 80 (along the length direction of the connector body, for example Figure 3 H direction) about 0.5-10mm.

[0161] The connecting ring 80 is made of non-PVC material. The material of the connecting ring 80 is the same as or similar to that of the transmission catheter 30. The material of the connecting ring 80 includes a base material and an elastic material. Among them, the base material and the elastic material are the main component materials of the drainage bag connector 5, and the weight percentage of the base material and the elastic material is more than 50%; the base material is PP or PE. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS. The weight percentage of the elastic material of the connecting ring 80 is greater than the weight percentage of the elastic material of the connector body. The material of the connecting ring 80 is the same as or similar to that of the transmission catheter 30. After the high-temperature sterilization process, the two can form a material fusion, and then the material of the connecting ring 80 and the transmission catheter 30 form a stable bonding seal.

[0162] The material of the connecting ring 80 can be pure EVA, POE, POP, SEBS, or a material with PP as the main body and elastic material added. The added elastic material has a certain viscosity at room temperature or at high temperature (40-150 degrees). Or in a high temperature environment, the material of the connecting ring 80 and the transmission conduit 30 have mutual adhesion or mutual melting or strong bond energy between molecules.

[0163] The connecting ring 80 may be a circular ring, and its cross section is also circular. The connecting ring 80 may also have a variety of shapes and styles, such as Fig.26 , Fig. 27As shown, the cross section of the connecting ring 80 can be a triangle (inverted cone), rectangle, trapezoid or irregular shape (special-shaped ring), which is not limited in the present application. There can be one or more connecting rings 80, which is also not limited in the present application.

[0164] After further research, it was found that in the above-mentioned embodiment of adding the connecting ring 80, although the problem of high-temperature failure of the fit and seal can be solved to a certain extent, when the peritoneal dialysis three-way connector made of PTFE (or the above-mentioned connector body) and the transmission tube (or transmission catheter) made of TPE are combined, the high-temperature resistance of the two materials is different. Among them, the transmission tube made of TPE undergoes plastic deformation and accelerates aging after being sterilized in a high-temperature water bath due to its low high-temperature resistance. Although there is a connecting ring 80 to fill and seal between the connector and the transmission tube, the elastic failure of the transmission tube will still cause the connecting ring 80 to be filled but unable to achieve complete fit and sealing, so the problem of sealing failure will still exist.

[0165] After in-depth research by the inventor, it was found that this was because the TPE transmission tube was expanded after being heated at high temperature and then cooled with cold water to set and crystallize. This caused the TPE to be damaged, aged and lost its elasticity, making it unable to wrap the TPEE material joint well, resulting in sealing failure and leakage.

[0166] Of course, the difference in high temperature resistance will also cause the hook strength of the hook structure between the joint and the transmission pipe to be destroyed, and there will still be a certain probability of disconnection under wet conditions.

[0167] The above-mentioned problem also exists in the connection between the bag end connector and the transmission conduit 30 .

[0168] To solve the above problems, Figure 36 to Figure 41 As shown, in one embodiment of the present invention, a ferrule 60 is added to the connection structure between the joint and the transmission tube (transmission conduit 30). The ferrule 60 can be applied to the connection structure between the joint and the transmission tube (transmission conduit 30) of any of the above embodiments, so that they can be referenced to each other, and the repeated parts will not be repeated one by one. Specifically, the ferrule 60 is fixedly sleeved outside the tube end 300 of the transmission tube, and the transmission tube and the corresponding joint are non-adhesive and sealed.

[0169] In this embodiment, the peritoneal dialysis three-way connector is made of TPEE. The first transmission tube and the second transmission tube are made of TPE. The material of the cuff 60 is selected from one of ABS, PC, TPEE, PS, aluminum, copper, silicone, and rubber. Preferably, the material of the cuff 60 is silicone.

[0170] In this embodiment, a hoop 60 is provided to tighten the transmission tube and the joint through a physical structure, so that even after the high temperature of sterilization, the existence of the hoop 60 can still tighten the transmission tube (transmission catheter 30, first transmission tube or second transmission tube) and the joint, maintain the fit and seal of the transmission tube and the joint, and avoid high temperature failure of the seal. Among them, the heat resistance of the material of the hoop 60 is better than the heat resistance of the material of the peritoneal dialysis three-way joint. Specifically, the hoop 60 does not undergo plastic deformation under temperature changes within -50 degrees to 150 degrees. The hoop 60 can be in a high temperature sterilization environment (100-120 degrees high temperature sterilization environment) without aging and plastic deformation. For example, the heat resistance temperature of the hoop 60 is 100 to 150 degrees.

[0171] By providing the high temperature resistant hoop 60, the transmission tube and the joint are still tightly clamped in a high temperature sterilization environment. Even if one of them has a certain degree of elastic failure due to high temperature, the hoop 60 does not deform before and after high temperature, and thus the location where the hoop 60 is located can still maintain the structural state before and after high temperature sterilization, and keep the location sealed. At the same time, the use of the hoop 60 can improve the connection strength at the location and reduce the probability of disconnection.

[0172] According to the above description, the pipe end 300 of the transmission pipe mainly includes a first portion 36 sleeved outside the diameter reduction section 112 and a second portion 35 sleeved on the expansion section 111. The hoop 60 can be sleeved on the first portion 36 or the second portion 35, or on both the first portion 36 and the second portion 35. In addition, a plurality of hoop 60 can be provided, and different hoop 60 are sleeved on the first portion or the second portion respectively.

[0173] like Fig.40 In the embodiment shown, the hoop 60 is only mounted on the first portion 36. Fig.39 In the embodiment shown, the hoop 60 is only sleeved on the second portion. Fig.36 or Fig.41 In the embodiment shown, the hoop 60 is disposed outside the entire expansion section 111. Fig.41 In the illustrated embodiment, the hoop 60 is a copper sleeve, wherein one end of the hoop 60 is correspondingly sleeved on the end chamfer 119 of the expansion section 111, and the other end of the hoop 60 is correspondingly sleeved on the reduction section 112 and adjacent to the connecting step 113, forming a front and rear hooking structure, and the front and rear positions of the hoop 60 are positioned by the end chamfer 119 and the connecting step 113.

[0174] In this embodiment, if Fig.37 , Fig.38As shown, only a single hoop 60 is provided, and the hoop 60 is a silicone sleeve; the hoop 60 spans the connection step 113, one end 61 of the hoop 60 is sleeved outside the diameter reduction section 112, and the other end 62 is sleeved outside the expansion section 111, and has a diameter reducing portion 63 at the position corresponding to the connection step. The hoop 60 extends continuously from one end 61 sleeved on the first part 36 to the other end 62 sleeved on the second part 35. The diameter reducing portion 63 corresponds to the position of the connection step, and the outer edge of the diameter reducing portion 63 corresponds to the outer edge of the connection step 113 at the same time, so that the tightening effect here is more prominent, and the fitting sealing effect formed here is difficult to be destroyed. In addition, the hoop 60 also forms a hooking structure of a secondary barb structure here, and the secondary hooking is performed on the basis of the hooking structure formed by the transmission pipe, which further ensures the structural connection strength of the transmission pipe and the joint here, and avoids the problem of disconnection.

[0175] The inner diameter of the silicone sleeve in its natural state without sleeve is smaller than the outer diameter of the non-sleeved section (non-tube end section) of the transmission tube (i.e., the transmission conduit 30). In this way, the silicone sleeve can tightly wrap the tube end 300 of the transmission tube when it is sleeved outside the transmission tube, so that the tube end 300 of the transmission tube is sealed and fits with the outer wall of the joint. The inner diameter of the silicone sleeve in its natural state without sleeve is 0.1mm to 0.8mm different from the outer diameter of the non-sleeved section of the transmission tube. In order to ensure the tight sealing effect, the length of the silicone sleeve sleeved on the expansion section 111 is more than one-sixth of the length of the expansion section 111.

[0176] To ensure the sealing effect, even in the state of high-pressure infusion, the silicone sleeve can still be sealed and will not be disconnected. The wall thickness of the silicone sleeve is more than 0.8mm and less than 1.5mm. For example, the diameter parameters of the transmission tube are 4.6mm (inner diameter) × 6.2mm (outer diameter), and the wall thickness is 0.8mm; the parameters of the silicone sleeve are 5.8±0.3mm inner diameter and 1±0.2mm wall thickness.

[0177] The diameter parameter of the transmission tube made of TPE material is 4.6 mm × 6.2 mm, and the maximum diameter (outer diameter) of the connection step of the peritoneal dialysis three-way connector is 6.3-6.4 mm. After the peritoneal dialysis three-way connector is inserted into the end of the transmission tube, the maximum diameter of the connection step is about 7.6 mm, and the original wall thickness of the transmission tube (in the unsheathed state or non-tube end section) is 0.8 mm, which becomes 0.6 mm thick.

[0178] Silicone tube for Fig.38The structure shown in the figure adopts 6mm×8mm and 5.5mm×7.5mm, with a wall thickness of 1mm. Sterilize at 121 degrees for 20 minutes, keep at -25 degrees for 24 hours, keep at 50 degrees for 24 hours, and finally conduct a leakage shake tube test at an internal pressure of 0.3 MPa. No leakage problem will occur under more than 2000 shake tubes (the shake tube test simulates a patient turning over in a hospital bed). It should be noted that the "degrees" representing the temperature in each embodiment of the present application are all degrees Celsius.

[0179] Likewise, the cuff 60 in the above embodiment can also be applied to the connection structure between the drainage bag connector 5 of the first bag body and the transmission catheter 30. Figure 42 to Figure 44 In the embodiment shown, the drainage bag connector 5 is made of PP material; the transmission catheter 30 is made of TPE material. The hoop 60 is fixedly sleeved outside the tube end of the transmission catheter 30, and the transmission catheter 30 and the second connecting end 502 are non-adhesively sealed and fitted. Among them, the transmission catheter 30, the reduced diameter portion, the expansion portion and the vertical step can all refer to the transmission tube, the reduced diameter section 112, the expansion section 111 and the connecting step 113 in the above embodiment, and can be referenced to each other, and the repeated parts will not be repeated.

[0180] like Figure 36 to Figure 41 The hoop 60 of different structures shown in the figure is applied to the drainage bag connector 5 to form a Figure 42 to Figure 44 Disposable drainage bags of different embodiments are shown.

[0181] like Fig.35 As shown, a stop structure is also fixedly provided outside the reduced diameter portion 56. The tube end of the transmission catheter 30 is sleeved outside the second connecting end 502 and does not exceed the stop structure. The stop structure includes a stop ring 77 that is integrally injection molded with the drainage bag connector 5. The stop ring 77 is used to indicate the sleeve position of the transmission catheter 30 to avoid excessive sleeve of the transmission catheter 30. The stop ring 77 protrudes from the outer wall of the reduced diameter portion. The outer diameter of the stop ring 77 is smaller than the outer diameter of the vertical step. The width W5 of the stop ring 77 along the length direction H of the drainage bag connector 5 is between 0.5 mm and 1.5 mm. For example, the width W5 of the stop ring 77 is 1 mm ± 0.1 mm.

[0182] It should be noted that the drainage bag connectors and disposable drainage bags in various embodiments of the present application can be referenced to each other, and the repeated parts will not be repeated.

[0183] Any numerical value cited herein includes all values ​​of lower and upper values ​​that increase by one unit from the lower limit to the upper limit, and there is at least a two-unit interval between any lower value and any higher value. For example, if the value of the quantity of a component or a process variable (such as temperature, pressure, time, etc.) is set forth to be from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in the specification. For values ​​less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be clearly expressed, and it can be considered that all possible combinations of numerical values ​​listed between the lowest value and the highest value are clearly set forth in the specification in a similar manner.

[0184] Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0185] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents possessed by such claims. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of the subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Claims

1. A disposable peritoneal dialysis drainage bag, characterized in that: include: A first bag body, which is used to collect fluid discharged during peritoneal dialysis; A transmission assembly, comprising a first transmission tube, a second transmission tube, a protective cap, a cuff and a peritoneal dialysis three-way connector; the peritoneal dialysis three-way connector comprises a dialysis Luer connector, a liquid inlet connector and a liquid outlet connector; the dialysis Luer connector is used to connect a peritoneal dialysis external tube; the protective cap is detachably covered on the dialysis Luer connector; One end of the first transmission tube is fixedly connected to the liquid inlet connector, and the other end is used to connect to the second bag containing the dialysis liquid; the second transmission tube is fixedly connected to the liquid outlet connector and the first bag; At least one of the liquid inlet joint and the liquid outlet joint is provided with a reduced diameter section and an expanded section; the annular interface between the reduced diameter section and the expanded section forms a connecting step; the connecting step is fixedly sleeved inside the pipe end of the connected transmission pipe, and the hoop is fixedly sleeved outside the pipe end of the transmission pipe, so that the transmission pipe and the corresponding joint are non-adhesively sealed and fitted; Among them, the peritoneal dialysis three-way connector is made of TPEE material; the peritoneal dialysis three-way connector having the dialysis Luer connector, the liquid inlet connector and the liquid outlet connector is an injection-molded integrated structure.

2. The disposable peritoneal dialysis drainage bag according to claim 1, characterized in that: The heat resistance of the material of the cuff is better than that of the material of the peritoneal dialysis three-way connector.

3. The disposable peritoneal dialysis drainage bag according to claim 1, characterized in that: The hoop does not undergo plastic deformation under temperature changes within a range of -50 degrees to 150 degrees.

4. The disposable peritoneal dialysis drainage bag according to any one of claims 1 to 3, characterized in that: The first transmission tube and the second transmission tube are made of TPE material; the material of the hoop is selected from one of ABS, PC, TPEE, PS, aluminum, copper, silicone and rubber.

5. The disposable peritoneal dialysis drainage bag according to claim 1, characterized in that: The hoop spans the connecting step, one end of the hoop is sleeved outside the reducing section, the other end of the hoop is sleeved outside the expanding section, and a reducing portion is provided at a position corresponding to the connecting step.

6. The disposable peritoneal dialysis drainage bag according to claim 1, characterized in that: The hoop sleeve is a silicone sleeve; the wall thickness of the silicone sleeve is greater than 0.8 mm and less than 1.5 mm.

7. The disposable peritoneal dialysis drainage bag according to claim 6, characterized in that: The inner diameter of the silicone sleeve in a natural state without sleeve installation is smaller than the outer diameter of the non-sleeved section of the transmission tube.

8. The disposable peritoneal dialysis drainage bag according to claim 7, characterized in that: The inner diameter of the silicone sleeve in a natural state without sleeve is 0.1mm to 0.8mm different from the outer diameter of the non-sleeved section of the transmission tube.

9. The disposable peritoneal dialysis drainage bag according to claim 6, characterized in that: The length of the silicone sleeve arranged on the expansion section is more than one sixth of the length of the expansion section.

10. A disposable drainage bag, comprising: A first bag body, a transmission catheter, and a hoop; The first bag body comprises: a liquid storage bag having a bag connection end and a drainage bag connector fixedly connected to the bag connection end; The drainage bag connector is an integral injection molding structure, and has a first connection end and a second connection end along its length direction; the first connection end is used to be fixedly connected to the liquid storage bag; the second connection end is fixedly connected to the transmission catheter; Wherein, the second connecting end is provided with a reduced diameter portion and an expanded portion; the reduced diameter portion is located on the side of the expanded portion close to the first connecting end, and the annular interface between the reduced diameter portion and the expanded portion forms a vertical step; the vertical step is fixedly sleeved inside the pipe end of the transmission conduit; the hoop is fixedly sleeved outside the pipe end of the transmission conduit, and the transmission conduit and the second connecting end are non-adhesively sealed and fitted.

11. The disposable drainage bag according to claim 10, characterized in that: A stop structure is fixedly provided outside the reduced diameter portion; the pipe end of the transmission conduit is sleeved outside the second connecting end and does not exceed the stop structure.

12. The disposable drainage bag according to claim 11, characterized in that: The stop structure comprises a stop ring which is integrally injection-molded with the drainage bag connector.

13. The disposable drainage bag according to claim 10, characterized in that: The drainage bag connector is made of PP material; the transmission catheter is made of TPE material.

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