Butt joint device for peritoneal dialysis catheter and peritoneal dialysis liquid bag

Abstract

The invention belongs to the technical field of peritoneal dialysis, and discloses a peritoneal dialysis catheter and peritoneal dialysis liquid bag butt joint device which comprises a connector tube and a dialysis catheter. The peripheral wall of the outer side of the dialysis catheter is fixedly sleeved with a shell tube coaxially arranged, one end of the shell tube is open, the other end of the shell tube is sealed, one end of the dialysis catheter is located in the shell tube, the other end of the dialysis catheter penetrates through the tube wall of the sealed end of the shell tube and extends to the outer side of the shell tube, and the dialysis catheter is sleeved with a movable tube in sliding connection. The inner side peripheral wall of the movable tube is attached to the outer side wall of the dialysis catheter, the outer side peripheral wall of the movable tube is attached to the outer side peripheral wall of the shell tube, a sliding groove coaxial with the movable tube is formed in the shell tube, and when the movable tube shrinks into the shell tube, the outer side wall of the movable tube seals and blocks the sliding groove; the whole butt-joint process is carried out in the protection cavity, bacteria entering the connector tube and the dialysis catheter can be reduced, meanwhile, the situation that fingers of a patient touch the butt-joint portion of the connector tube and the movable tube by mistake in the butt-joint process can be effectively avoided, and the infection risk is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of peritoneal dialysis, and in particular relates to a peritoneal dialysis tube and a peritoneal dialysis fluid bag docking device. Background Art

[0002] As an important renal replacement therapy, peritoneal dialysis has the advantages of residual renal function protection and home operation, and is favored by more and more patients with uremia. At present, the peritoneal dialysis catheter and the interface tube on the peritoneal dialysis bag are mainly connected through a simple and reliable threaded interface or a bayonet interface. However, since the operation process requires the catheter to be exposed first, and then the operator aligns the interface for connection, the docking process has no mechanical calibration and no protection. Misoperation may cause the patient's fingers to contact the interface, which may cause bacteria to enter the catheter, induce peritoneal dialysis-related peritonitis, and become an important reason affecting the treatment effect. This increases the requirements for the operator's eye-hand coordination ability and limits the promotion of peritoneal dialysis in the uremic population; therefore, in the prior art, there is a problem of easy accidental touch and contamination of the docking site during the docking process between the peritoneal dialysis catheter and the liquid bag interface tube. Summary of the invention

[0003] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a peritoneal dialysis tube and peritoneal dialysis fluid bag docking device, which solves the problem of easy accidental contact and contamination of the docking site during the docking process of the peritoneal dialysis tube and the fluid bag interface tube in the prior art.

[0004] The purpose of the present invention can be achieved through the following technical solutions: A peritoneal dialysis tube and peritoneal dialysis fluid bag docking device, comprising an interface tube and a dialysis catheter; A shell tube coaxially arranged is fixedly sleeved on the outer peripheral wall of the dialysis catheter, one end of the shell tube is open, and the other end of the shell tube is sealed. One end of the dialysis tube is located inside the shell tube, and the other end of the dialysis catheter passes through the tube wall of the sealed end of the shell tube and extends to the outside of the shell tube. A movable tube slidably connected is sleeved on the dialysis catheter, and the inner peripheral wall of the movable tube is in contact with the outer peripheral wall of the dialysis catheter, and the outer peripheral wall of the movable tube is in contact with the outer peripheral wall of the shell tube. A slide groove coaxially arranged with the movable tube is provided on the shell tube. When the movable tube is retracted inside the shell tube, the outer peripheral wall of the movable tube seals and blocks the slide groove; A detachably connected protective cavity is sleeved on the outer peripheral wall of the shell tube near the open end, and a round through hole is opened in the protective cavity away from the shell tube end; One end of the interface tube is fixed on the fluid bag, the diameter of the outer peripheral wall of the interface tube away from the fluid bag end is equal to the diameter of the inner peripheral wall of the movable tube, and a plurality of toggle rods are connected to the interface tube wall and are evenly distributed in a ring shape around the central axis of the interface tube, and the toggle rods are rotatably hinged with the interface tube, and the toggle rods near the fluid bag end extend toward the end away from the central axis of the interface tube, and the other end of the toggle rod is fixed with a sealing flap, and when the sealing flaps are in contact with each other away from the toggle rod end, the sealing flaps are closed to form a sealing cavity that wraps the interface tube away from the fluid bag end, and the sealing flaps in the closed state can pass through the round through hole and extend into the protective cavity; The distance between the end of the toggle rod away from the peripheral wall of the interface tube and the central axis of the interface tube is greater than the radius of the round through hole; A symmetrically placed ear plate is fixed on the peripheral wall of the shell tube near the opening end, and a rotating shaft is rotatably connected between the two ear plates, and the central axis of the rotating shaft is vertically placed with the central axis of the shell tube; A cover plate is provided at the open end of the shell tube, and the cover plate is used to seal and block the open end of the shell tube. A mounting groove is provided on the cover plate near the rotating shaft, and the two ends of the rotating shaft are respectively fixed to the groove walls at both ends of the mounting groove. The ear plate, the rotating shaft and the cover plate are all located in the protective cavity; A handle is slidably connected in the slide groove, and one end of the handle is fixed to the outer peripheral wall of the movable tube; The rotating shaft is located on the peripheral wall of the shell tube near the sliding groove, and a top bar coaxially placed with the sliding groove is fixed on the side of the handle near the open end of the shell tube. The top bar slides through the tube wall of the shell tube, and the top bar is located on the side of the rotating shaft near the movable tube; When the movable tube is flush with the open end of the shell tube, the top strip extends out of the shell tube away from the handle end; When the top strip is flush with the open end of the shell tube, the movable tube is completely retracted inside the shell tube; A pair of symmetrically placed torsion springs are sleeved on the rotating shaft, and the two ends of the torsion springs are respectively fixed to the cover plate and the shell tube; An accommodating groove is provided at one end of the toggle rod close to the peripheral wall of the interface tube, and a fixing block is provided in the accommodating groove. The fixing block is fixed to the peripheral wall of the interface tube, and a pin is rotatably connected to the fixing block. The pin is fixed to the toggle rod, and the pin is placed vertically to the interface tube, and the central axis of the pin is parallel to the tangent of the peripheral wall of the interface tube close to the corresponding pin. A first magnet ring placed coaxially is fixed on the end of the interface tube away from the liquid bag, and a second magnet ring placed coaxially is fixed on the inner peripheral wall of the movable tube.

[0005] Beneficial effects of the present invention: 1. Hold the interface tube close to the end of the liquid bag, and extend the closed sealing flaps through the round through hole into the protective cavity. When the toggle rod is squeezed and contacted with the side cavity wall of the round through hole, continue to push the interface tube into the protective cavity. At this time, the toggle rod drives the corresponding sealing flap to tilt away from the end of the liquid bag to the end away from the central axis of the interface tube. Each sealing flap separates and opens, so that the end of the interface tube away from the liquid bag is exposed to the protective cavity. Then, the movable tube is pushed out of the shell tube through the slide groove, so that the movable tube is close to the interface tube for docking. The entire docking process is carried out inside the protective cavity, which can reduce the entry of bacteria into the interface tube and the dialysis catheter. At the same time, it can effectively prevent the patient's fingers from accidentally touching the docking position between the interface tube and the movable tube during the docking process, thereby reducing the risk of infection, reducing the requirements for the patient's eye-hand coordination ability, and expanding the population suitable for peritoneal dialysis. 2. The slide groove and the handle are provided to facilitate the extension and retraction of the movable tube; at the same time, with the ear plate, the rotating shaft, the cover plate and the top strip, the cover plate can be opened through the top strip during the process of pushing the movable tube out, so as to facilitate the automatic opening of the cover plate and avoid the movable tube from contacting the cover plate and causing contamination. Moreover, through the torsion spring, when the top strip and the movable tube are retracted inside the shell tube, the cover plate is promptly pressed onto the open end of the shell tube to prevent the inside of the movable tube and the dialysis catheter from being contaminated when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0007] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial structural schematic diagram of the shell and tube of the present invention; Figure 3 It is a partial structural schematic diagram of the protection cavity of the present invention; Figure 4 It is a partial structural schematic diagram of the cover plate of the present invention; Figure 5 It is a schematic diagram of the structure of the top strip of the present invention; Figure 6 It is a schematic structural diagram of each sealing flap of the present invention in an open state; Figure 7 Schematic diagram of the structure of each sealing flap of the present invention in the open state at different viewing angles; Figure 8 It is a schematic structural diagram of the sealing flaps of the present invention in a closed state.

[0008] In the figure, 100, an interface tube; 101, a first magnet ring; 200. Dialysis catheter; 300, shell and tube; 301, slide groove; 302, thread groove; 400, movable tube; 401, second magnet ring; 402, handle; 500, protection cavity; 501, round through hole; 600, toggle rod; 601, receiving slot; 602, fixing block; 603, pin shaft; 700, sealing flap; 800, top strip; 900, ear plate; 901, rotating shaft; 902, cover plate; 903, torsion spring. DETAILED DESCRIPTION

[0009] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0010] like Figure 1 As shown, a peritoneal dialysis tube and peritoneal dialysis fluid bag docking device includes an interface tube 100 and a dialysis catheter 200; A coaxially arranged shell tube 300 is fixedly sleeved on the outer peripheral wall of the dialysis catheter 200, one end of the shell tube 300 is open, and the other end of the shell tube 300 is sealed. One end of the dialysis tube is located inside the shell tube 300, and the other end of the dialysis catheter 200 passes through the tube wall of the sealed end of the shell tube 300 and extends to the outside of the shell tube 300. A slidingly connected movable tube 400 is sleeved on the dialysis catheter 200, and the inner peripheral wall of the movable tube 400 is in contact with the outer peripheral wall of the dialysis catheter 200, and the outer peripheral wall of the movable tube 400 is in contact with the outer peripheral wall of the shell tube 300. A slide groove 301 coaxially arranged with the movable tube 400 is provided on the shell tube 300. When the movable tube 400 is retracted inside the shell tube 300, the outer peripheral wall of the movable tube 400 seals and blocks the slide groove 301. like Figure 3 As shown, a detachably connected protective cavity 500 is sleeved on the outer peripheral wall of the shell tube 300 near the open end, and a round through hole 501 is opened at the end of the protective cavity 500 away from the shell tube 300; like Figure 4As shown, one end of the interface tube 100 is fixed on the fluid bag, the diameter of the outer peripheral wall of the interface tube 100 away from the fluid bag end is equal to the diameter of the inner peripheral wall of the movable tube 400, and a plurality of toggle rods 600 are connected to the wall of the interface tube 100 and are evenly distributed in a ring shape around the central axis of the interface tube 100. The toggle rods 600 are all rotatably hinged with the interface tube 100, and the toggle rods 600 near the end of the fluid bag extend toward the end away from the central axis of the interface tube 100, and the other end of the toggle rods 600 is fixed with a sealing flap 700. When the sealing flaps 700 are attached to each other away from the end of the toggle rod 600, the sealing flaps 700 are closed and form a sealed cavity that wraps the end of the interface tube 100 away from the fluid bag, and the sealing flaps 700 in the closed state can pass through the round through hole 501 and extend into the protective cavity 500; The distance between the end of the toggle rod 600 away from the peripheral wall of the mouthpiece 100 and the central axis of the mouthpiece 100 is greater than the radius of the round through hole 501; The liquid bag and the interface tube 100 are both disposable products. When in use, tear open the product packaging bag, keep the sealing flaps 700 closed to take out the product, then hold the interface tube 100 close to the liquid bag end, and extend the closed sealing flaps 700 through the round through hole 501 into the protective cavity 500. When the toggle rod 600 is squeezed and contacted with the side cavity wall of the round through hole 501, continue to push the interface tube 100 into the protective cavity 500. At this time, the toggle rod 600 drives the corresponding sealing flap 700 away from the liquid bag end and away from the central axis of the interface tube 100. The end is tilted, and each sealing flap 700 is separated and opened, so that the interface tube 100 is exposed to the protection cavity 500 away from the liquid bag end, and then the movable tube 400 is pushed out of the shell tube 300 through the slide groove 301, so that the movable tube 400 is close to the interface tube 100 for docking. The whole docking process is carried out inside the protection cavity 500, which can reduce the entry of bacteria into the interface tube 100 and the dialysis catheter 200. At the same time, it can effectively prevent the patient's fingers from accidentally touching the docking position between the interface tube 100 and the movable tube 400 during the docking process, thereby reducing the risk of infection.

[0011] Preferably, the sealing flaps 700 are made of rubber material to improve the sealing performance of each sealing flap 700 when closed.

[0012] A symmetrically placed ear plate 900 is fixed on the peripheral wall of the shell tube 300 near the open end, and a rotating shaft 901 is rotatably connected between the two ear plates 900, and the central axis of the rotating shaft 901 is vertically placed with the central axis of the shell tube 300; like Figure 2 As shown, a cover plate 902 is provided at the open end of the shell tube 300, and the cover plate 902 is used to seal and block the open end of the shell tube 300. A mounting groove is provided on the cover plate 902 near the rotating shaft 901, and both ends of the rotating shaft 901 are respectively fixed to the groove walls at both ends of the mounting groove. The ear plate 900, the rotating shaft 901 and the cover plate 902 are all located in the protective cavity 500; When not in use, the movable tube 400 can be retracted into the shell tube 300, and the open end of the shell tube 300 can be sealed by the cover plate 902 to prevent the interior of the movable tube 400 and the dialysis catheter 200 from being contaminated when not in use.

[0013] In order to facilitate the movement of the movable tube 400, a handle 402 is slidably connected in the slide groove 301, and one end of the handle 402 is fixed to the outer peripheral wall of the movable tube 400; the purpose of facilitating the movement of the movable tube 400 is achieved by pushing the handle 402.

[0014] In order to facilitate the automatic opening of the cover plate 902 and prevent the movable tube 400 from contacting the cover plate 902 and causing contamination, as shown in FIG. Figure 5 As shown, the rotating shaft 901 is located on the peripheral wall of the shell tube 300 near the sliding groove 301, and a top bar 800 coaxially arranged with the sliding groove 301 is fixed on the side of the handle 402 near the open end of the shell tube 300. The top bar 800 slides through the tube wall of the shell tube 300, and the top bar 800 is located on the side of the rotating shaft 901 near the movable tube 400; When the movable tube 400 is flush with the open end of the shell tube 300, the top strip 800 extends out of the shell tube 300 away from the handle 402; When the top strip 800 is flush with the open end of the shell tube 300, the movable tube 400 is completely retracted inside the shell tube 300; Preferably, the top strip 800 can be set to an appropriate length so that when the movable tube 400 is flush with the open end of the shell tube 300, the cover plate 902 is fully opened; when the movable tube 400 is pushed out, the handle 402 simultaneously drives the top strip 800 so that the top strip 800 pushes the cover plate 902 to open, thereby realizing automatic opening of the cover plate 902 and avoiding contamination of the docking part caused by contact between the movable tube 400 and the cover plate 902.

[0015] A pair of symmetrically placed torsion springs 903 are sleeved on the rotating shaft 901, and the two ends of the torsion spring 903 are respectively fixed to the cover plate 902 and the shell tube 300; preferably, the torsion spring 903 is always in a compressed state so that the cover plate 902 can be pressed onto the open end of the shell tube 300 when not in use. When the top strip 800 shrinks into the inside of the shell tube 300, the cover plate 902 loses the limit block of the top strip 800, and under the action of the torsion spring 903, the cover plate 902 is pushed to rotate to seal the open end of the shell tube 300.

[0016] like Figure 7 and Figure 8As shown, a receiving groove 601 is provided at one end of the toggle rod 600 close to the peripheral wall of the interface tube 100, and a fixing block 602 is provided in the containing groove 601. The fixing block 602 is fixed to the peripheral wall of the interface tube 100, and a pin 603 is rotatably connected to the fixing block 602. The pin 603 is fixed to the toggle rod 600, and the pin 603 is vertically placed with the interface tube 100, and the central axis of the pin 603 is parallel to the tangent of the peripheral wall of the interface tube 100 close to the corresponding pin 603; the toggle rod 600 is rotatably hinged with the peripheral wall of the interface tube 100, so that when the toggle rod 600 is squeezed and contacted with the cavity wall at the round through hole 501, each sealing flap 700 is unfolded, and the unfolded state of each sealing flap 700 is as shown in FIG. Figure 6 shown.

[0017] A first magnet ring 101 placed coaxially is fixed to the end of the interface tube 100 away from the liquid bag, and a second magnet ring 401 placed coaxially is fixed to the inner peripheral wall of the movable tube 400; through the magnetic adsorption of the first magnet ring 101 and the second magnet ring 401 after docking, a stable connection between the interface tube 100 and the movable tube 400 is ensured after docking.

[0018] The movable tube 400 is used to extend out of the shell tube 300, and a coaxially arranged truncated cone groove is provided on the inner peripheral wall of one end thereof. The diameter of the truncated cone groove away from the sealing end of the shell tube 300 is larger than the diameter of the truncated cone groove close to the sealing end of the shell tube 300, so as to facilitate the sleeve connection between the movable tube 400 and the interface tube 100.

[0019] Preferably, an antibacterial coating may be added to the inner side of the protective cavity 500 to further reduce the incidence of infection.

[0020] Preferably, a threaded groove 302 is provided on the outer peripheral wall of the shell tube 300 near the open end, and the protective cavity 500 is sleeved on the shell tube 300 and threadedly connected to the threaded groove 302; so that when not in use, the protective cavity 500 can be disassembled and removed, and the removed protective cavity 500 can be immersed in a disinfectant or an ultraviolet disinfection cabinet, wherein the disinfectant can be hydrogen peroxide, which is also called hydrogen peroxide, which has a bactericidal and disinfecting effect; the ultraviolet disinfection cabinet can usually use ultraviolet rays with a wavelength of 254 nanometers to achieve a good bactericidal effect.

[0021] Preferably, the protective cavity 500 is composed of two symmetrically placed half shell cavities, and the two half shell cavities can be detachably connected by bolts, so as to avoid interference caused by the cover plate 902 in the removal of the protective cavity 500.

[0022] Preferably, an elastic rubber covering the slide groove 301 is fixed on the outer wall of the shell tube 300, and the handle 402 passes through the elastic rubber away from the end of the movable tube 400. The elastic rubber is always in a relaxed state, and the slide groove 301 is sealed without affecting the movement of the handle 402 along the slide groove 301.

[0023] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A peritoneal dialysis tube and peritoneal dialysis fluid bag docking device, comprising an interface tube (100) and a dialysis catheter (200), characterized in that: A shell tube (300) is fixedly sleeved on the outer peripheral wall of the dialysis catheter (200) and is coaxially arranged. One end of the shell tube (300) is open, and the other end of the shell tube (300) is sealed. One end of the dialysis tube is located inside the shell tube (300), and the other end of the dialysis catheter (200) passes through the tube wall of the sealed end of the shell tube (300) and extends to the outside of the shell tube (300). A movable tube (400) is sleeved on the dialysis catheter (200) and is slidably connected. The inner peripheral wall of the movable tube (400) is in contact with the outer peripheral wall of the dialysis catheter (200), and the outer peripheral wall of the movable tube (400) is in contact with the outer peripheral wall of the shell tube (300). A slide groove (301) is provided on the shell tube (300) and is coaxially arranged with the movable tube (400). When the movable tube (400) is retracted inside the shell tube (300), the outer peripheral wall of the movable tube (400) seals and blocks the slide groove (301). A detachably connected protective cavity (500) is sleeved on the outer peripheral wall of the shell tube (300) near the open end, and a round through hole (501) is opened at the end of the protective cavity (500) away from the shell tube (300); One end of the interface tube (100) is fixed on the liquid bag, and the diameter of the outer peripheral wall of the interface tube (100) away from the liquid bag is equal to the diameter of the inner peripheral wall of the movable tube (400). A plurality of toggle rods (600) are connected to the wall of the interface tube (100) and are evenly distributed in a ring shape around the central axis of the interface tube (100). The toggle rods (600) are rotatably hinged to the interface tube (100), and the toggle rods (600) near the liquid bag end extend toward the end away from the central axis of the interface tube (100). The other end of the toggle rods (600) is fixed with a sealing flap (700). When the ends of the sealing flaps (700) away from the toggle rods (600) are attached to each other, the sealing flaps (700) are closed to form a sealed cavity that wraps the end of the interface tube (100) away from the liquid bag, and the sealing flaps (700) in the closed state can pass through the round through hole (501) and extend into the protective cavity (500); The distance between one end of the toggle rod (600) away from the peripheral wall of the mouthpiece (100) and the central axis of the mouthpiece (100) is greater than the radius of the round through hole (501).

2. The peritoneal dialysis tube and peritoneal dialysis fluid bag docking device according to claim 1, characterized in that: An ear plate (900) symmetrically placed at one end is fixed to the peripheral wall of the shell tube (300) near the opening end, a rotating shaft (901) is rotatably connected between the two ear plates (900), and the central axis of the rotating shaft (901) is perpendicular to the central axis of the shell tube (300); A cover plate (902) is provided at the open end of the shell tube (300), and the cover plate (902) is used to seal and block the open end of the shell tube (300). A mounting groove is provided on the cover plate (902) near the rotating shaft (901), and two ends of the rotating shaft (901) are respectively fixed to the groove walls at two ends of the mounting groove. The ear plate (900), the rotating shaft (901) and the cover plate (902) are all located in the protective cavity (500).

3. The peritoneal dialysis tube and peritoneal dialysis fluid bag docking device according to claim 2, characterized in that: A handle (402) is slidably connected in the slide groove (301), and one end of the handle (402) is fixed to the outer peripheral wall of the movable tube (400).

4. The peritoneal dialysis tube and peritoneal dialysis fluid bag docking device according to claim 3, characterized in that: The rotating shaft (901) is located on a peripheral wall of a side of the shell tube (300) where the slide groove (301) is provided. A top bar (800) is fixed on a side of the handle (402) close to the open end of the shell tube (300) and is coaxially arranged with the slide groove (301). The top bar (800) slides through the tube wall of the shell tube (300). The top bar (800) is located on a side of the rotating shaft (901) close to the movable tube (400). When the movable tube (400) is flush with the open end of the shell tube (300), the top strip (800) extends out of the shell tube (300) away from the end of the handle (402); When the top strip (800) is flush with the open end of the shell tube (300), the movable tube (400) is completely retracted inside the shell tube (300).

5. The peritoneal dialysis tube and peritoneal dialysis fluid bag docking device according to claim 4, characterized in that: A pair of symmetrically placed torsion springs (903) are sleeved on the rotating shaft (901), and two ends of the torsion springs (903) are respectively fixed to the cover plate (902) and the shell tube (300).

6. The peritoneal dialysis tube and peritoneal dialysis fluid bag docking device according to claim 5, characterized in that: An accommodating groove (601) is provided at one end of the toggle rod (600) close to the peripheral wall of the mouthpiece (100), and a fixing block (602) is provided in the accommodating groove (601). The fixing block (602) is fixed to the peripheral wall of the mouthpiece (100), and a pin shaft (603) is rotatably connected to the fixing block (602). The pin shaft (603) is fixed to the toggle rod (600), and the pin shaft (603) is placed vertically with the mouthpiece (100), and the central axis of the pin shaft (603) is parallel to the tangent line of the peripheral wall of the mouthpiece (100) close to the corresponding pin shaft (603).

7. The peritoneal dialysis tube and peritoneal dialysis fluid bag docking device according to claim 6, characterized in that: A first magnet ring (101) disposed coaxially is fixed to the end of the interface tube (100) away from the fluid bag, and a second magnet ring (401) disposed coaxially is fixed to the inner peripheral wall of the movable tube (400).

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