Peritoneal dialysis catheter applied to dialysis in nephrology department

Abstract

The invention provides a peritoneal dialysis catheter applied to dialysis in the nephrology department, and belongs to the technical field of peritoneal dialysis catheters. Comprising an outer tube, a plug and a first guide tube, an insertion groove is formed in the front end of the outer tube, a baffle ring is movably connected into the insertion groove, an insertion block is fixedly connected to the tail end of the plug and matched with the insertion groove, a plurality of limiting assemblies are arranged in the front end of the outer tube, the limiting assemblies are connected with the convex ends of the insertion block respectively, and an adjusting ring is movably connected to the outer side of the outer tube. The adjusting ring is connected with the limiting assembly, and the front end of the first guide pipe is matched with the front end of the plug. Through the arranged limiting assembly, a backing ring and a baffle ring are reset, so that an inserting block is pushed out of an inserting groove, the plug is conveniently replaced under the non-contact condition, waste liquid is prevented from making contact with limbs, the plug is rapidly replaced, waste liquid staying on the outer side of the plug is reduced, and the cleanliness of the end of the outer pipe is maintained; bacteria accumulation at the end part of the outer pipe is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of peritoneal dialysis tubes, and more particularly to a peritoneal dialysis tube used for dialysis in nephrology. Background Art

[0002] Peritoneal dialysis is an important renal replacement therapy for patients with end-stage renal disease. Its principle is to use the patient's own peritoneum as a semipermeable membrane. By perfusing dialysate into the peritoneal cavity, the body's metabolic waste, toxins, and excess water are removed, thereby maintaining a stable internal environment. Compared with hemodialysis, peritoneal dialysis has the advantages of simple operation, stable hemodynamics, and high patient freedom of movement, making it particularly suitable for home dialysis treatment. As the core device of this treatment, the peritoneal dialysis catheter needs to be left in the patient's abdominal cavity for a long time and circulate the dialysate through an external tubing system. Its structural design directly affects dialysis efficiency, operational safety, and infection control effectiveness.

[0003] In the existing technology, the outer tube and the disposable plug are connected using a conventional plug-in connection method, and manual operation is required for replacement. Not only is the procedure cumbersome, but it is also easy to cause waste liquid residue or leakage, increasing the risk of contamination and infection. In addition, the dialysate injection channel and the waste liquid discharge channel in the traditional piping system intersect, which may cause waste liquid backflow contamination and affect the dialysate exchange efficiency. Summary of the Invention

[0004] In view of the problem that the dialysate injection channel and the waste liquid discharge channel in the traditional piping system in the prior art intersect, which may cause waste liquid backflow contamination and affect the dialysate exchange efficiency, the purpose of the present invention is to provide a peritoneal dialysis tube for use in nephrology dialysis.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A peritoneal dialysis tube used for dialysis in the nephrology department comprises an outer tube, a plug and a first catheter, a slot being provided at the front end of the outer tube, a retaining ring being movably connected inside the slot, an insert being fixedly connected to the tail end of the plug, and the insert being adapted to the slot, a plurality of limit assemblies being provided inside the front end of the outer tube, and the limit assemblies being respectively connected to the convex ends of the insert, an adjustment ring being movably connected to the outside of the outer tube, and the adjustment ring being connected to the limit assemblies, the front end of the first catheter being adapted to the front end of the plug, a second catheter being fixedly connected to the outside of the first catheter, a guide tube being movably connected inside the first catheter, a control tube being movably connected inside the first catheter, and the control tube being fixedly connected to the guide tube, a switching assembly being provided on the first catheter, and the switching assembly being movably connected to the control tube.

[0007] Optionally, the limiting assembly includes a rotary plate, a limiting block, a folding spring, a traction rope and a connecting block, and the rotary plate, limiting block, folding spring and traction rope are symmetrically arranged, the limiting block is fixedly connected to one side of the rotary plate, and the folding spring is fixedly connected to the other side of the rotary plate, the folding spring is penetrated by a through hole, the traction rope passes through the through hole, one end of the traction rope is fixedly connected to the back side of the rotary plate, and the end of the traction rope away from the rotary plate is fixedly connected to the connecting block.

[0008] Optionally, several accommodating blocks are fixedly connected to the front end of the outer tube, the limit block, folding spring and traction rope are all located inside the accommodating block, and the rotating plate is movably connected to the end of the accommodating block through a rotating shaft, and limit grooves are provided on both sides of the multiple protrusions of the insert block, and the limit blocks are respectively adapted to the limit grooves.

[0009] Optionally, a return spring is fixedly connected to the interior of the slot, a free end of the return spring is fixedly connected to a collar, and the collar is fixedly connected to the retaining ring.

[0010] Optionally, the outer side of the outer tube is provided with a thread, and the outer tube is movably connected to a control ring through the thread, the control ring is rotatably connected to the adjustment ring, and the end of the connecting block away from the traction rope is fixedly connected to the end of the adjustment ring.

[0011] Optionally, the switching assembly includes a drive cylinder, a drive pin and a compression spring, a drive groove is provided on the outer side of the control tube, the drive pin is fixedly connected to the inner side of the drive cylinder, and the drive pin is movably engaged with the drive groove, a first annular groove is provided at one end of the drive cylinder, and the end of the first conduit is movably connected to the inside of the first annular groove, a second annular groove is provided at the other end of the drive cylinder, and the compression spring is fixedly connected to the inside of the second annular groove.

[0012] Optionally, one end of the driving cylinder is movably connected to a sewage pipe through a second annular groove, and a plurality of connecting bars are fixedly connected between the second conduit and the sewage pipe, and the connecting bars are distributed in a circular array.

[0013] Optionally, the connecting strip passes through the interior of the driving cylinder, and the connecting strip is movably connected to the driving cylinder, the free end of the compression spring is fixedly connected to the end of the sewage pipe, a thread is provided on the outside of the sewage pipe, and the sewage pipe is movably connected to a push ring through the thread, and the end of the push ring is in conflict with the end of the driving cylinder.

[0014] Optionally, a first channel is provided on the guide tube, and the first conduit is connected to the sewage pipe through the first channel; a second channel is provided on the guide tube, and the first conduit is connected to the second conduit through the second channel.

[0015] Optionally, a sealing block is fixedly connected to the interior of the first conduit, the cross-sectional area of the sealing block is larger than the cross-sectional area of the inlet end of the first channel, and the cross-sectional area of the seal is larger than the cross-sectional area of the inlet end of the second channel.

[0016] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0017] In the above scheme, the limit assembly is set to reset the gasket and the retaining ring, thereby pushing the plug out of the slot, so as to facilitate the replacement of the plug without contact, avoid contact between waste liquid and limbs, and quickly replace the plug, which is beneficial to reduce the waste liquid staying on the outside of the plug, and is beneficial to maintain the cleanliness of the outer tube end and avoid the accumulation of bacteria at the outer tube end.

[0018] Through the provided switching assembly, the driving cylinder drives the driving pin to move synchronously. Due to the movable cooperation between the driving pin and the driving groove, the control tube rotates ninety degrees inside the first conduit, thereby causing the guide cylinder to rotate ninety degrees synchronously, thereby facilitating the block to block the inlet end of the first channel or the second channel, thereby achieving more independent operations of waste liquid discharge and dialysate re-injection, avoiding backflow of waste liquid after discharge, and helping to reduce the intersection of waste liquid inside the sewage pipe at the intersection of the first conduit and the second conduit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the outer tube explosion structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the split structure of the outer tube of the present invention;

[0024] Figure 5 It is a schematic structural diagram of the limit assembly of the present invention;

[0025] Figure 6 for Figure 5 Another perspective structural diagram;

[0026] Figure 7 This is a schematic diagram of the explosion structure of the first conduit of the present invention;

[0027] Figure 8Schematic diagram of the structure of the guide tube of the present invention in different states;

[0028] Figure 9 It is a structural schematic diagram of the sewage pipe and its connecting parts of the present invention.

[0029] [Reference Signs]

[0030] 1. Outer tube; 2. Plug; 3. First conduit; 4. Slot; 5. Retaining ring; 6. Insert;

[0031] 7. Limiting assembly; 701. Rotating plate; 702. Limiting block; 703. Folding spring; 704. Pull rope; 705. Connecting block;

[0032] 8. Adjustment ring; 9. Second guide tube; 10. Guide tube; 11. Control tube;

[0033] 12. Switching assembly; 121. Driving cylinder; 122. Driving pin; 123. Compression spring;

[0034] 13. Perforation; 14. Accommodating block; 15. Limiting groove; 16. Return spring; 17. Ring; 18. Control ring; 19. First ring groove; 20. Second ring groove; 21. Drain pipe; 22. Connecting strip; 23. Push ring; 24. First channel; 25. Second channel; 26. Sealing block; 27. Drive groove.

[0035] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0036] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative methods for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0037] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0038] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0039] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0040] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0041] like Figures 1 to 9 As shown, the embodiment of the present invention provides a peritoneal dialysis tube for dialysis in nephrology, comprising an outer tube 1, a plug 2 and a first catheter 3. The front end of the first catheter 3 is fixedly connected with a fixing ring, so that when the front end of the first catheter 3 is connected to the front end of the plug 2, the first catheter 3 can be tightly connected to the plug 2, thereby improving the convenience of operation. Before use, the outer side of the plug 2 is sleeved with an iodine-containing cap, which is disposable. The plug 2 and the iodine-containing cap after use need to be replaced and installed on the front end of the outer tube 1. The front end of the outer tube 1 is provided with a slot 4, and the interior of the slot 4 is movably connected with a retaining ring 5. The tail end of the plug 2 is fixedly connected with an insert block 6, which is adapted to the slot 4. The slot 4 is provided with four limiting portions, which are respectively adapted to the four convex ends of the insert block 6. Several limiting components 7 are provided inside the front end of the outer tube 1, and the limiting components 7 are respectively connected to the convex ends of the insert block 6. The outside of the outer tube 1 is movably connected with an adjusting ring 8, and the adjusting ring 8 is connected to the limiting component 7.

[0042] The front end of the first catheter 3 is adapted to the front end of the plug 2. The front end of the first catheter 3 is usually adapted to the front end of the plug 2 by a threaded rotation mode, which belongs to an existing connection mode. In addition, an iodine-containing cap is directly sleeved on the outside of the front end head of the general outer tube 1. After being connected to the end of the peritoneal dialysis tube, the iodine-containing cap is directly replaced. However, residual waste liquid is still located at the end of the outer tube 1, and waste liquid may leak out. The outside of the first catheter 3 is fixedly connected to the second catheter 9, and the interior of the first catheter 3 is movably connected to a guide tube 10. The interior of the first catheter 3 is movably connected to a control tube 11, and the control tube 11 is fixedly connected to the guide tube 10. A switching assembly 12 is provided on the first catheter 3. The switching assembly 12 is used to change the angle of the guide tube 10, thereby changing the flow direction of the liquid in the peritoneal dialysis tube, and the switching assembly 12 is movably connected to the control tube 11. The outer tube 1 is connected to the inner tube through a joint. The inner tube is directly connected to the patient's abdomen, and the outer tube 1 is used to be connected to a disposable peritoneal dialysis tube.

[0043] like Figure 1 、 Figures 3 to 6 As shown, the limiting assembly 7 includes a rotary plate 701, a limiting block 702, a folding spring 703, a traction rope 704 and a connecting block 705. The rotary plate 701, the limiting block 702, the folding spring 703 and the traction rope 704 are all symmetrically arranged. The limiting block 702 is fixedly connected to one side of the rotary plate 701, and the folding spring 703 is fixedly connected to the other side of the rotary plate 701. A through hole 13 is opened on the folding spring 703, and the traction rope 704 passes through the through hole 13. The folding spring 703 is arc-shaped, and the traction passes through the through hole 13, which facilitates the folding spring 703 to fold and deform. At the same time, the rotation of the rotary plate 701 can be controlled by the traction rope 704. One end of the traction rope 704 is fixedly connected to the back side of the rotary plate 701, and the end of the traction rope 704 away from the rotary plate 701 is fixedly connected to the connecting block 705. The front end of the outer tube 1 is fixedly connected to a plurality of accommodating blocks 14. The number of accommodating blocks 14 is four, and each accommodating block 14 Two limit blocks 702 are provided. The limit blocks 702, folding springs 703 and traction rope 704 are all located inside the accommodating block 14, and the rotating plate 701 is movably connected to the end of the accommodating block 14 through a rotating shaft. Limiting grooves 15 are provided on both sides of multiple convex portions of the plug block 6. The limit blocks 702 are respectively adapted to the limit grooves 15. A return spring 16 is fixedly connected to the inside of the slot 4. The free end of the return spring 16 is fixedly connected to a collar 17, and the collar 17 is fixedly connected to the retaining ring 5. Under the action of the return spring 16, the collar 17 and the retaining ring 5 can completely fill the slot 4, so that when the plug 2 is not installed, the end of the outer tube 1 can remain flat, preventing dirt from entering the interior of the outer tube 1 from the gap. A thread is provided on the outside of the outer tube 1, and the outer tube 1 is movably connected to a control ring 18 through a thread. The control ring 18 is rotatably connected to the adjusting ring 8. The end of the connecting block 705 away from the traction rope 704 is fixedly connected to the end of the adjusting ring 8.

[0044] Separate the plug 2 from the front end of the first catheter 3, then rotate the control ring 18 on the outside of the outer tube 1 to move the adjustment ring 8 away from the front end of the outer tube 1, driving several connecting blocks 705 to move synchronously, thereby controlling the two traction ropes 704 at the front end of the connecting block 705 to move simultaneously, driving the rotating plate 701 to rotate around its rotating axis, so that the limit block 702 is separated from the limit groove 15. At this time, the folding spring 703 is compressed and shortened. Under the action of the reset spring 16, the gasket and the retaining ring 5 are reset, thereby pushing the plug 6 out of the slot 4, so as to facilitate the replacement of the plug 2 without contact, avoid contact between waste liquid and limbs, and quickly replace the plug 2, which is conducive to reducing the waste liquid staying on the outside of the plug 2, and is conducive to maintaining the cleanliness of the end of the outer tube 1, and avoiding the accumulation of bacteria at the end of the outer tube 1.

[0045] like Figure 1 、 Figures 7 to 9 As shown, the switching assembly 12 includes a driving cylinder 121, a driving pin 122 and a compression spring 123. A driving groove 27 is provided on the outside of the control tube 11. The driving pin 122 is fixedly connected to the inner side of the driving cylinder 121, and the driving pin 122 is movably matched with the driving groove 27. One end of the driving cylinder 121 is provided with a first annular groove 19, and the end of the first conduit 3 is movably connected to the inside of the first annular groove 19. The other end of the driving cylinder 121 is provided with a second annular groove 20, and the compression spring 123 is fixedly connected to the inner side of the driving cylinder 121. Connected to the inside of the second annular groove 20, the driving cylinder 121 is located between the first conduit 3 and the sewage pipe 21 through the first annular groove 19 and the second annular groove 20, and the driving cylinder 121, the first conduit 3 and the sewage pipe 21 are tightly sealed. One end of the driving cylinder 121 is movably connected to the sewage pipe 21 through the second annular groove 20. Several connecting strips 22 are fixedly connected between the second conduit 9 and the sewage pipe 21, and the connecting strips 22 are distributed in a circular array. The connecting strips 22 are conducive to the positioning of the first conduit 3 and the sewage pipe. 21, the integrity of the connecting strip 22 runs through the interior of the driving cylinder 121, and the connecting strip 22 is movably connected to the driving cylinder 121, the free end of the compression spring 123 is fixedly connected to the end of the sewage pipe 21, and a thread is provided on the outside of the sewage pipe 21, and the sewage pipe 21 is movably connected to a push ring 23 through the thread, and the end of the push ring 23 conflicts with the end of the driving cylinder 121, a first channel 24 is provided on the guide tube 10, and the first conduit 3 is connected to the sewage pipe 21 through the first channel 24, and a second channel 25 is provided on the guide tube 10, and the first conduit 3 is connected to the second conduit 9 through the second channel 25, and a sealing block 26 is fixedly connected to the inside of the first conduit 3, and the cross-sectional area of the sealing block 26 is larger than the cross-sectional area of the inlet end of the first channel 24, and the cross-sectional area of the seal is larger than the cross-sectional area of the inlet end of the second channel 25, and the sealing block 26 is semicircular, and the sealing block 26 switches and seals the inlet end of the first channel 24 and the inlet end of the second channel 25, which is conducive to controlling the flow direction of the liquid inside the first conduit 3 and the second conduit 9.

[0046] The driving cylinder 121 drives the driving pin 122 to move synchronously. Due to the active cooperation between the driving pin 122 and the driving groove 27, the control tube 11 rotates 90 degrees inside the first catheter 3. At this time, the block 26 releases the obstruction on the inlet end of the second channel 25 and blocks the inlet end of the first channel 24, so that the waste liquid cannot flow back from the sewage pipe 21 into the interior of the first catheter 3. Then, the pipeline clamp is removed to restore the patency of the second catheter 9, so that the peritoneal dialysis fluid can enter the second channel 25 of the guide tube 10 through the second catheter 9 and flow into the interior of the first catheter 3, and finally flow into the patient's abdomen through the outer tube 1 and the inner tube. In this way, the guide cylinder rotates 90 degrees synchronously, thereby facilitating the blocking of the inlet end of the first channel 24 or the second channel 25 by the block, thereby achieving more independent operations of waste liquid discharge and dialysate re-injection, avoiding backflow of waste liquid after discharge, and facilitating the intersection of waste liquid in the sewage pipe 21 at the intersection of the first catheter 3 and the second catheter 9.

[0047] The workflow of the technical solution provided by the present invention is as follows:

[0048] First, the outer tube 1 is connected to the inner tube through a joint. The inner tube is directly connected to the patient's abdomen, and the outer tube 1 is used to be connected to a disposable peritoneal dialysis tube.

[0049] Then, the iodine cap is separated from the front end of the plug 2, and then the front end of the plug 2 is inserted into the front end of the first conduit 3 through the fixing ring. In the initial state, the sealing block 26 blocks the inlet end of the second channel 25, so that the waste liquid in the patient's abdomen enters the outer tube 1 through the inner tube, and then enters the interior of the first conduit 3, passes through the first channel 24 of the guide tube 10 and finally enters the interior of the dirty bag through the sewage pipe 21. After the patient's abdominal waste liquid is completely discharged into the dirty bag; rotate the push ring 23 to push the drive cylinder 121 forward, the compression spring 123 is stretched in the interior of the second annular groove 20, and the drive cylinder 121 drives the drive pin 12 2 moves synchronously. Due to the active cooperation between the driving pin 122 and the driving slot 27, the control tube 11 rotates 90 degrees inside the first catheter 3, thereby causing the guide tube to rotate 90 degrees synchronously. At this time, the sealing block 26 releases the obstruction on the inlet end of the second channel 25 and blocks the inlet end of the first channel 24, so that the waste liquid cannot flow back from the sewage pipe 21 into the interior of the first catheter 3. The pipeline clamp is removed, so that the second catheter 9 is unobstructed, allowing the peritoneal dialysis fluid to pass through the second catheter 9 into the second channel 25 of the guide tube 10, and then flow into the interior of the first catheter 3, and then flow into the patient's abdomen through the outer tube 1 and the inner tube.

[0050] After completing the replacement of the peritoneal dialysis fluid, separate the plug 2 from the front end of the first catheter 3, then rotate the control ring 18 on the outside of the outer tube 1 to move the adjustment ring 8 away from the front end of the outer tube 1, driving several connecting blocks 705 to move synchronously, thereby controlling the two traction ropes 704 at the front end of the connecting block 705 to move simultaneously, driving the rotating plate 701 to rotate around its rotating axis, so that the limit block 702 is separated from the limit groove 15. At this time, the folding spring 703 is compressed and shortened. Under the action of the reset spring 16, the gasket and the retaining ring 5 are reset, thereby pushing the plug 6 out of the slot 4, thereby separating the plug 2 from the front end of the outer tube 1. After replacing the new plug 2, the new iodine cap is fixed to the outside of the plug 2.

[0051] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. While specific details are described in detail in the preferred embodiments to provide a thorough understanding of the present invention, those skilled in the art will be able to fully understand the present invention without these details. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A peritoneal dialysis tube for nephrology dialysis, comprising an outer tube, a plug and a first catheter, characterized in that: A slot is provided at the front end of the outer tube, a retaining ring is movably connected inside the slot, an insert block is fixedly connected to the tail end of the plug, the insert block is adapted to the slot, a plurality of limit assemblies are provided inside the front end of the outer tube, and the limit assemblies are respectively connected to the convex ends of the insert block, an adjustment ring is movably connected to the outside of the outer tube, and the adjustment ring is connected to the limit assemblies, the front end of the first conduit is adapted to the front end of the plug, the outside of the first conduit is fixedly connected to the second conduit, the interior of the first conduit is movably connected to a guide tube, the interior of the first conduit is movably connected to a control tube, and the control tube is fixedly connected to the guide tube, a switching assembly is provided on the first conduit, and the switching assembly is movably connected to the control tube.

2. The peritoneal dialysis tube for nephrology dialysis according to claim 1, characterized in that: The limiting assembly includes a rotary plate, a limiting block, a folding spring, a traction rope and a connecting block. The rotary plate, limiting block, folding spring and traction rope are symmetrically arranged. The limiting block is fixedly connected to one side of the rotary plate, and the folding spring is fixedly connected to the other side of the rotary plate. A through-hole is formed on the folding spring, and the traction rope passes through the through-hole. One end of the traction rope is fixedly connected to the back side of the rotary plate, and the end of the traction rope away from the rotary plate is fixedly connected to the connecting block.

3. The peritoneal dialysis tube for nephrology dialysis according to claim 2, characterized in that: The front end of the outer tube is fixedly connected to several accommodating blocks, the limit blocks, folding springs and traction ropes are all located inside the accommodating blocks, and the rotating plate is movably connected to the end of the accommodating block through a rotating shaft. Limiting grooves are provided on both sides of the multiple protrusions of the insert block, and the limit blocks are respectively adapted to the limit grooves.

4. The peritoneal dialysis tube for nephrology dialysis according to claim 1, characterized in that: A reset spring is fixedly connected to the interior of the slot, a collar is fixedly connected to the free end of the reset spring, and the collar is fixedly connected to the retaining ring.

5. The peritoneal dialysis tube for nephrology dialysis according to claim 3, characterized in that: The outer side of the outer tube is provided with a thread, and the outer tube is movably connected to a control ring through the thread. The control ring is rotatably connected to the adjustment ring, and the end of the connecting block away from the traction rope is fixedly connected to the end of the adjustment ring.

6. The peritoneal dialysis tube for nephrology dialysis according to claim 1, characterized in that: The switching assembly includes a driving cylinder, a driving pin and a compression spring. A driving groove is provided on the outer side of the control tube. The driving pin is fixedly connected to the inner side of the driving cylinder, and the driving pin and the driving groove are movably matched. A first annular groove is provided at one end of the driving cylinder, and the end of the first conduit is movably connected to the inside of the first annular groove. A second annular groove is provided at the other end of the driving cylinder, and the compression spring is fixedly connected to the inside of the second annular groove.

7. The peritoneal dialysis tube for nephrology dialysis according to claim 6, characterized in that: One end of the driving cylinder is movably connected to a sewage pipe through a second annular groove. A plurality of connecting bars are fixedly connected between the second conduit and the sewage pipe, and the connecting bars are distributed in a circular array.

8. The peritoneal dialysis tube for nephrology dialysis according to claim 7, characterized in that: The connecting strip passes through the interior of the driving cylinder and is movably connected to the driving cylinder. The free end of the compression spring is fixedly connected to the end of the sewage pipe. A thread is provided on the outside of the sewage pipe. The sewage pipe is movably connected to a push ring through the thread, and the end of the push ring is in conflict with the end of the driving cylinder.

9. The peritoneal dialysis tube for nephrology dialysis according to claim 1, characterized in that: The guide tube is provided with a first channel, and the first conduit is connected to the sewage pipe through the first channel. The guide tube is provided with a second channel, and the first conduit is connected to the second conduit through the second channel.

10. The peritoneal dialysis tube for nephrology dialysis according to claim 1, characterized in that: A sealing block is fixedly connected to the interior of the first conduit, the cross-sectional area of the sealing block is larger than the cross-sectional area of the inlet end of the first channel, and the cross-sectional area of the seal is larger than the cross-sectional area of the inlet end of the second channel.

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