A peritoneal dialysis pipeline two-way flow blocking device and a peritoneal dialysis equipment

Abstract

The utility model discloses a peritoneal dialysis pipeline two -way resistance flow device and peritoneal dialysis equipment, including the first resistance flow mechanism and the second resistance flow mechanism who sets up respectively in the pipeline containing groove both sides of the card box fixed store, the first resistance flow mechanism includes the first clamping plate and sets up the gasbag between the first clamping plate with the card box fixed store, the second resistance flow mechanism includes the pneumatic cylinder and the second clamping plate, the gas circuit system its air inlet is connected to the pressure source, its first gas outlet is connected to the gasbag through the first gas circuit, its second gas outlet is connected to the pneumatic cylinder through the second gas circuit, and the gasbag and the pneumatic cylinder respond to the pressure change in the gas circuit system, drive the first clamping plate and the second clamping plate synchronous movement to the opposite direction with the first clamping plate and the second clamping plate synchronous movement to the opposite direction to clamp the pipeline, or synchronous movement to release the pipeline. The utility model discloses through two -way cooperation clamping mechanism to eliminate the unnecessary clamping stress that equipment bears, has reduced the fatigue damage risk of equipment key connecting position to the effective promotion equipment overall service life and operation reliability.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a bidirectional flow blocking device for peritoneal dialysis tubing and a peritoneal dialysis device. Background Technology

[0002] Peritoneal dialysis is an important renal replacement therapy for patients with end-stage renal disease. Its principle is to use the body's own peritoneum as a semipermeable membrane, periodically injecting and draining dialysate into the peritoneal cavity to remove metabolic waste and excess water, thereby purifying the blood. During peritoneal dialysis, dialysate is injected into the patient's peritoneal cavity and drained through tubing. The tubing system is usually equipped with a safety choke point to quickly and reliably shut off the tubing in case of abnormalities, such as air detection alarms or abnormal pressure, interrupting the delivery of dialysate and ensuring patient safety.

[0003] Existing peritoneal dialysis tubing flow control devices typically employ a single-sided clamping method. This involves a power source driving a clamping plate towards a fixed base, compressing and flattening the tubing between them to block fluid flow. However, this single-sided clamping method has significant drawbacks. During clamping, the applied clamping force is transmitted through the compressed tubing to the connected device body. This unintended stress, acting repeatedly or over a long period on the device's precision components, can lead to loosening at connections, sensor drift, or damage, ultimately shortening the overall lifespan and reliability of the peritoneal dialysis equipment. Therefore, there is an urgent need in the art for a tubing safety flow control device that effectively prevents the transmission of clamping force to the device body and offers more stable and reliable operation. Utility Model Content

[0004] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a bidirectional flow blocking device for peritoneal dialysis tubing and peritoneal dialysis equipment, which eliminates unnecessary clamping stress on the equipment, significantly reduces the risk of fatigue damage to key connection parts of the equipment, and thus effectively improves the overall service life and operational reliability of the equipment.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A bidirectional flow blocking device for peritoneal dialysis tubing, comprising: The first flow-blocking mechanism is disposed on one side of the pipeline receiving groove of the cartridge fixing chamber, and includes a first clamping plate and an airbag disposed between the first clamping plate and the cartridge fixing chamber. The second flow-blocking mechanism is located on the other side of the pipeline receiving groove, including a second clamping plate and a cylinder that can drive the second clamping plate to move. Pressure source; An air circuit system has an air inlet connected to the pressure source, a first air outlet connected to the airbag via a first air circuit, and a second air outlet connected to the cylinder via a second air circuit. The airbag and the cylinder respond to pressure changes in the air circuit system by driving the first clamping plate and the second clamping plate to move synchronously toward each other to clamp the pipeline, or to move synchronously in opposite directions to release the pipeline. An inflation / deflation switch is installed in the gas path between the pressure source and the gas path system to control the on / off state of the gas path system.

[0006] As a further improvement of this utility model, the first flow-blocking mechanism further includes a first elastic reset element, and the airbag, when inflated, overcomes the elastic force of the first elastic reset element to push the first clamping plate away from the pipeline receiving groove.

[0007] As a further improvement of this utility model, the first clamping plate includes a transverse plate and a longitudinal plate connected to each other, and the end of the transverse plate near the pipeline receiving groove is the first abutting surface.

[0008] As a further improvement of this utility model, a first through hole is opened at each of the four corners of the longitudinal plate, and a guide stud is provided through each first through hole. The threaded end of the guide stud passes through the first through hole and is connected to the cartridge fixing chamber. The first elastic reset element is a first reset spring, which is sleeved on the guide stud and abuts between the cap of the guide stud and the longitudinal plate.

[0009] As a further improvement of this utility model, the second flow-blocking mechanism also includes a second elastic reset element, which pushes the second clamping plate away from the pipeline receiving groove when the piston rod of the cylinder is in the extended state, overcoming the elastic force of the second elastic reset element.

[0010] As a further improvement of this utility model, the second flow-blocking mechanism further includes: A transmission plate is connected to the piston rod of the cylinder, and the cylinder is fixed to the side of the cartridge fixing chamber near the pipeline receiving groove by a connecting plate; The transmission rod has one end connected to the transmission plate and the other end connected to the second clamping plate. When the transmission plate moves, it can drive the transmission rod and the second clamping plate to move synchronously as a whole. A fixed base is fixedly installed on one side of the cartridge fixing compartment. The fixed base has a through hole, and the transmission rod slides through the through hole and is slidably connected to the fixed base. The second elastic reset element is a second reset spring, which is sleeved on the transmission rod and rests between the fixed seat and the second clamping plate.

[0011] As a further improvement of this utility model, the fixed base, transmission rod, and second elastic reset element are configured as two sets, and are respectively symmetrically arranged at both ends of the transmission plate.

[0012] As a further improvement of this utility model, the second clamping plate is U-shaped, and the two free ends of the second clamping plate are respectively fixedly connected to two symmetrically arranged transmission rods. The U-shaped end of the second clamping plate is the second abutting surface.

[0013] This utility model also protects a peritoneal dialysis device, including a bidirectional flow blocking device for peritoneal dialysis tubing; The cartridge retainer has a pipe receiving groove on its side; A cartridge holder is disposed within the cartridge fixing compartment; A cartridge fixing plate is used to fix the cartridge. The cartridge fixing plate is slidably disposed in the cartridge fixing seat, and its end is provided with a clamping hole perpendicular to the pipeline direction. When the first clamping plate and the second clamping plate move synchronously towards each other, the first clamping plate and the second clamping plate extend into the clamping hole to clamp the pipeline.

[0014] As a further improvement of this utility model, guide rails are symmetrically arranged inside the cartridge fixing seat, the cartridge fixing plate is slidably connected to the guide rails, and can slide out or be inserted into the cartridge fixing seat relative to the guide rails axially.

[0015] Compared with the prior art, this utility model has the following advantages: 1. This utility model discloses a bidirectional flow-blocking device for peritoneal dialysis tubing. By setting a first flow-blocking mechanism and a second blocking component to jointly form a bidirectional synergistic clamping mechanism, bidirectional clamping is achieved, effectively isolating the clamping force within the tubing itself, preventing stress transmission to the equipment body to the maximum extent, eliminating unnecessary clamping stress on the equipment, reducing the risk of fatigue damage to key connection parts of the equipment, thereby effectively improving the overall service life and operational reliability of the equipment.

[0016] 2. This utility model provides a bidirectional flow blocking device for peritoneal dialysis tubing. The two blocking components are driven by a single power source and achieve synchronous and symmetrical operation, which simplifies the gas path, reduces costs, and also ensures the consistency and reliability of the clamping action. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the gas path connection of a bidirectional flow-blocking device for peritoneal dialysis tubing according to the present invention; Figure 2 This is a three-dimensional structural diagram of a bidirectional flow-blocking device for peritoneal dialysis tubing according to the present invention; Figure 3 This is a schematic diagram of the hidden cartridge fixing seat and cartridge fixing plate in a bidirectional flow blocking device for peritoneal dialysis tubing according to the present invention. Figure 4 This is a schematic diagram of the first flow-blocking structure in a bidirectional flow-blocking device for peritoneal dialysis tubing according to the present invention; Figure 5 This is a schematic diagram of the flow-through state of the peritoneal dialysis tubing bidirectional flow-blocking device of this utility model; Figure 6 This is a schematic diagram of a bidirectional flow-blocking device for peritoneal dialysis tubing in the present invention, wherein the tubing is in a clamped state. Figure 7 This is a schematic diagram of the cartridge fixing plate, cartridge, and tubing assembly in a peritoneal dialysis device according to the present invention. Figure 8 This is a three-dimensional structural diagram of a peritoneal dialysis device according to the present invention. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Figures 1 to 6 The diagram shown is a structural schematic of one embodiment of a bidirectional flow-blocking device for peritoneal dialysis tubing according to the present invention. Its main body includes a first flow-blocking mechanism 100, a second flow-blocking mechanism 200, a pressure source 300, a gas path system 400, and a gas filling / draining switch 500.

[0020] The first flow-blocking mechanism 100 is disposed on one side of the tubing receiving groove 610 of the cartridge fixing chamber 600, and includes a first clamping plate 110 and an airbag 120 disposed between the first clamping plate 110 and the cartridge fixing chamber 600. In this embodiment, the first clamping plate 110 includes a transverse plate 1110 and a longitudinal plate 1120 connected to each other. The end of the transverse plate 1110 near the tubing receiving groove 610 is folded inward to form a semi-circular clamping surface 1110a. The clamping surface can be bonded with a silicone pressure block with a Shore hardness of 30-50HA to ensure uniform pressure distribution and reduce damage to the peritoneal dialysis tubing. A through hole is provided in the center of the longitudinal plate 1120. The inlet and outlet air tubes 1210 of the airbag 120 pass through the through hole on the longitudinal plate 1120 and are located on the outside of the longitudinal plate 1120.

[0021] Preferably, in this embodiment, the first flow-blocking mechanism 100 further includes a first elastic reset element 130. When the airbag 110 is inflated, it overcomes the elastic force of the first elastic reset element 130 to push the first clamping plate 110 away from the pipeline receiving groove 610. First through holes are respectively opened at the four corners of the longitudinal plate 1120, and second through holes are also opened at the four corners of the airbag 120. A guide stud 140 is provided through each of the first through holes. The threaded end of the guide stud 140 passes through the first through hole and the second through hole in sequence and is connected to the cartridge fixing chamber 600. The first elastic reset element 130 is a first reset spring, which is sleeved on the guide stud 140 and abuts between the cap of the guide stud 140 and the longitudinal plate 1120.

[0022] The second flow-blocking mechanism 200 is located on the other side of the pipeline receiving groove 610, including a cylinder 210, a second clamping plate 220, and a second elastic reset element 230. When the piston rod 210a of the cylinder 210 is in the extended state, it overcomes the elastic force of the second elastic reset element 230 to push the second clamping plate 220 away from the pipeline receiving groove 610.

[0023] Preferably, in this embodiment, the second flow-blocking mechanism 200 further includes a transmission plate 240, a transmission rod 250, and a sliding seat 260. The transmission plate 240 is connected to the piston rod 210a of the cylinder 210. The cylinder 210 is fixed to the side of the cartridge fixing chamber 600 near the pipeline receiving groove 610 via a connecting plate 270. One end of the transmission rod 250 is connected to the transmission plate 240, and the other end is connected to the second clamping plate 220. When the transmission plate 240 moves, it can drive the transmission rod 250 and the second clamping plate 220 to move synchronously as a whole. The sliding seat 260 is fixedly disposed on one side of the cartridge fixing chamber 600. The sliding seat 260 has a through hole. The transmission rod 250 slides through the through hole and is slidably connected to the sliding seat 260. The setting direction of the transmission rod 250 is parallel to the movement direction of the piston rod 210a of the cylinder 210. The second elastic reset element 230 is a second reset spring, which is sleeved on the transmission rod 250 and abuts against the sliding seat 260 and the second clamping plate 220.

[0024] Preferably, in this embodiment, to make the second clamping plate 220 move more smoothly and thus more stably clamp the pipe 1000, the sliding seat 260, the transmission rod 250, and the second elastic reset element 230 are all configured in two sets, and are symmetrically arranged at both ends of the transmission plate 240. The second clamping plate 220 is U-shaped, and its two free ends are fixedly connected to one end of the two symmetrically arranged transmission rods 250. The U-shaped end of the second clamping plate 220 is the second abutment surface 220a, which is semi-circular. The two free ends of the second clamping plate 220 and the sides opposite to the sliding seat 260 are provided with inwardly recessed limiting grooves. Whether the second reset spring is in the compressed or reset state, both ends of the second reset spring are always located in the limiting grooves, providing precise axial positioning for the ends of the two second reset springs, preventing them from sliding laterally, misaligning, or even dislodging during compression or reset, thereby ensuring accurate spring force action lines and smooth and reliable movement.

[0025] By setting the first flow-blocking mechanism 100 and the second blocking component 200 together to form a bidirectional synergistic clamping mechanism, bidirectional clamping is achieved. The synchronous and symmetrical force application ensures that the pipeline is subjected to absolutely uniform force. Combined with the buffering and constant force effect of the two return springs, the stability of clamping, vibration resistance and sealing reliability are greatly improved, eliminating the risk of loosening or leakage of the pipeline in the blocked state.

[0026] Pressure source 300 is used to simultaneously provide gas pressure to bladder 120 and cylinder 210. In this embodiment, the pressure source is an air pump. The first clamping plate 120 and the second clamping plate 220 move synchronously towards each other under the control of a single air source, realizing bidirectional coordinated clamping of pipeline 1000, balancing the clamping force inside the pipeline, avoiding stress transmission to the equipment body, and effectively protecting the equipment. This device has a novel structure, good synchronization, and high reliability.

[0027] The air system 400 simultaneously transmits pressure changes generated by a single air source to two flow-blocking mechanisms to achieve synchronized operation. In this embodiment, the air system 400 includes a main pipe connected to the inflation / deflation switch 500 and two branch pipes connected to the airbag 120 and the cylinder 210 respectively, forming a first air passage and a second air passage. The main pipe of the air system 400 is connected to the pressure source 300. The first air outlet of the air system 400 is connected to the airbag 120 through the first branch pipe, and its second air outlet is connected to the cylinder 210 through the second branch pipe. In response to pressure changes in the air system 400, the airbag 120 and the cylinder 210 drive the first clamping plate 110 and the second clamping plate 220 to move synchronously towards each other to clamp the pipe 1000, or to move synchronously away from each other to release the pipe 1000.

[0028] An inflation / deflation switch 500 is used to control the on / off state of the air circuit system 400. It is installed in the air circuit between the pressure source 300 and the air circuit system 400. The inlet of the inflation / deflation switch 500 is connected to the pressure source 300, and its outlet is connected to the main pipe of the air circuit system 400. The inflation / deflation switch 500 is configured to selectively connect the pressure source 300 to the airbag 120 and the cylinder 210 for inflation, or to connect the airbag and the cylinder 210 to the atmosphere for deflation. In this embodiment, the inflation / deflation switch 500 is a solenoid valve connected to a control module. After receiving a control signal from the control module, the solenoid valve quickly opens or closes to control the flow of gas, thereby controlling the expansion or contraction of the airbag 120 and the extension / retraction of the piston rod 210a of the cylinder 210. When the solenoid valve is de-energized, the first clamping plate 110 and the second clamping plate 220 perform a clamping action, and the pipeline is in a clamped state; when the solenoid valve is energized and the pressure source 300 supplies air, the first clamping plate 110 and the second clamping plate 220 perform an opening action, and the pipeline is in a flowing state. In this embodiment, two inflation / deflation switches 500 can also be arranged in parallel to control the gas passages of the airbag 120 and the cylinder 210 respectively.

[0029] Circulation action: such as Figure 5 As shown, when the equipment is working normally, the solenoid valve opens, and the control module controls the pressure source 300 to supply air to the air circuit system 400. After passing through the air circuit system 400, the compressed air is divided into two paths and enters the air bag 120 and the cylinder 210 simultaneously. Driven by the same air pressure, the air bag 120 inflates, and the piston rod 210a of the cylinder 210 extends at the same speed. The air bag 120 and the piston rod 210a overcome the elastic force of their respective return springs and push the first clamping plate 110 and the second clamping plate 220 to move in opposite directions, thereby moving the first pressing surface 1110a and the second pressing surface 220a away from the pipeline 1000. At this time, the pipeline 1000 located in the pipeline receiving groove 610 is in a flow state.

[0030] Clamping action: such as Figure 6As shown, when the peritoneal dialysis device triggers an air bubble alarm or a leakage alarm, the control module controls the solenoid valve to close, blocking the connection between the pressure source 300 and the airbag 120 and cylinder 210, and releasing the gas inside the airbag 120 and cylinder 210; or, when the device is powered off, the solenoid valve automatically closes, releasing the gas inside the airbag 120 and cylinder 210. The piston rods 210a of the airbag 120 and cylinder 210 are both in a contracted state. The first return spring and the second return spring release elastic force and respectively push the first clamping plate 110 and the second clamping plate 220 to move synchronously towards each other, so that the first abutting surface 1110a and the second abutting surface 220a symmetrically contact and flatten the tubing 1000, realizing the automatic safety flow blocking function and avoiding medical risks caused by these abnormal situations. In this process, the driving force generated by the first flow blocking mechanism 100 and the second flow blocking mechanism 200 is equal, and the force exerted on the tubing is equal in magnitude and opposite in direction, canceling each other out, and no unnecessary clamping stress is generated and transmitted through the tubing 1000.

[0031] like Figure 2 , Figure 7 , Figure 8 As shown, this utility model also protects a peritoneal dialysis device, including a bidirectional flow blocking device for peritoneal dialysis tubing, a cartridge fixing chamber 600, a cartridge fixing seat 700, and a cartridge fixing plate 800.

[0032] The cartridge holder 600 has a tubing receiving groove 610 on its side. The cartridge holder 600 is located inside the peritoneal dialysis equipment main unit. The main unit housing has an opening on one side, and the tubing receiving groove 610 is positioned corresponding to the opening.

[0033] The cartridge holder 700 is used for mounting the cartridge holder plate 800, and the cartridge holder 700 is disposed within the cartridge holder compartment 600. Preferably, in this embodiment, to facilitate the disassembly and installation of the cartridge 900, guide rails are symmetrically arranged within the cartridge holder 700, and the cartridge holder plate 800 is slidably connected to the guide rails, and can slide out or be inserted into the cartridge holder 700 relative to the guide rails axially.

[0034] The cartridge fixing plate 800 is used to fix the cartridge 900 and the pipeline 1000. One end of the cartridge 900 is provided with five ports, namely a waste liquid port, a heating port, an end port, a replenishment port, and a human body port, which are respectively connected to the waste liquid pipeline, the heating pipeline, the end bag pipeline, the replenishment pipeline, and the human body pipeline. The end of the cartridge fixing plate 800 is provided with a clamping hole 810 perpendicular to the direction of the pipeline 1000 and a clamping groove 820 for clamping the pipeline on the cartridge fixing plate 800. The clamping hole 810 is elongated, and its length is greater than the length of the first abutting surface 1110a of the longitudinal plate 1120 and the second abutting surface 220a of the second clamping plate 220. The inner walls of both ends of the clamping hole 810 are semi-circular. When the first clamping plate 110 and the second clamping plate 220 move synchronously towards each other, the first clamping plate 110 and the second clamping plate 220 can simultaneously extend into the clamping hole 810 to clamp the pipeline 1000.

[0035] The specific usage process of the peritoneal dialysis device according to this embodiment is as follows: When treatment is required, first pull the cartridge fixing plate 800 out of the cartridge fixing seat 700, then install the cartridge 900 into the mounting slot on the cartridge fixing plate 800, and fix the peritoneal dialysis tubing connected to the port of the cartridge 900 into the cartridge slot 820. Then push the cartridge fixing plate 800 and the cartridge 900 together along the guide rail in the cartridge fixing seat 700 into the cartridge fixing chamber 600 (inside the main unit of the equipment). During treatment, the waste liquid tubing, heating tubing, end-bag tubing, replenishment tubing, and human tubing are all in a flowing state. When risks such as power failure, abnormal pressure, leakage, or air bubbles are detected, the first and second flow-blocking mechanisms simultaneously clamp the five tubings to achieve flow obstruction.

[0036] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A bidirectional flow-blocking device for peritoneal dialysis tubing, characterized in that, include: The first flow-blocking mechanism (100) is disposed on one side of the pipe receiving groove (610) of the cartridge fixing chamber (600), including a first clamping plate (110) and an airbag (120) disposed between the first clamping plate (120) and the cartridge fixing chamber (600). The second flow-blocking mechanism (200) is located on the other side of the pipeline receiving groove (610), including a second clamping plate (220) and a cylinder (210) that can drive the second clamping plate (220) to move. Pressure source (300); An air circuit system (400) has an air inlet connected to the pressure source (300), a first air outlet connected to the airbag (120) via a first air passage, and a second air outlet connected to the cylinder (210) via a second air passage. The airbag (120) and the cylinder (210) respond to pressure changes in the air circuit system (400) by driving the first clamping plate (110) and the second clamping plate (220) to move synchronously toward each other to clamp the pipeline (1000), or to move synchronously in opposite directions to release the pipeline (1000). An air filling / discharging switch (500) is installed in the air path between the pressure source (300) and the air path system (400) to control the on / off state of the air path system (400).

2. The bidirectional flow-blocking device for peritoneal dialysis tubing according to claim 1, characterized in that: The first flow-blocking mechanism (100) further includes a first elastic reset element (130), and the airbag (120) pushes the first clamp (110) away from the pipeline receiving groove (610) by overcoming the elastic force of the first elastic reset element (130) when it is inflated.

3. The bidirectional flow-blocking device for peritoneal dialysis tubing according to claim 2, characterized in that: The first clamping plate (110) includes a transverse plate (1110) and a longitudinal plate (1120) connected to each other, and the end of the transverse plate (1110) near the pipe receiving groove (610) is the first abutting surface (1110a).

4. The bidirectional flow-blocking device for peritoneal dialysis tubing according to claim 3, characterized in that: The longitudinal plate (1120) has first through holes at its four corners. Each first through hole is provided with a guide stud (140). The threaded end of the guide stud (140) passes through the first through hole and is connected to the cartridge fixing chamber (600). The first elastic reset element (130) is a first reset spring, which is sleeved on the guide stud (140) and abuts between the cap of the guide stud (140) and the longitudinal plate (1120).

5. A bidirectional flow-blocking device for peritoneal dialysis tubing according to claim 1, characterized in that: The second flow-blocking mechanism (200) also includes a second elastic reset element (230), which pushes the second clamping plate (220) away from the pipeline receiving groove (610) by overcoming the elastic force of the second elastic reset element (230) when the piston rod (210a) of the cylinder (210) is in the extended state.

6. A bidirectional flow-blocking device for peritoneal dialysis tubing according to claim 5, characterized in that, The second flow-blocking mechanism (200) further includes: The transmission plate (240) is connected to the piston rod (210a) of the cylinder (210), and the cylinder (210) is fixed to the side of the cartridge fixing chamber (600) near the pipeline receiving groove (610) by the connecting plate (270); The transmission rod (250) has one end connected to the transmission plate (240) and the other end connected to the second clamping plate (220). When the transmission plate (240) moves, it can drive the transmission rod (250) and the second clamping plate (220) to move synchronously as a whole. A sliding seat (260) is fixedly disposed on one side of the cartridge fixing chamber (600). The sliding seat (260) has a through hole, and the transmission rod (250) slides through the through hole and is slidably connected to the sliding seat (260). The second elastic reset element (230) is a second reset spring, which is sleeved on the transmission rod (250) and abuts between the sliding seat (260) and the second clamping plate (220).

7. A bidirectional flow-blocking device for peritoneal dialysis tubing according to claim 6, characterized in that: The sliding seat (260), transmission rod (250), and second elastic reset element (230) are configured as two groups and are symmetrically arranged at both ends of the transmission plate (240).

8. A bidirectional flow-blocking device for peritoneal dialysis tubing according to claim 7, characterized in that: The second clamping plate (220) is U-shaped. The two free ends of the second clamping plate (220) are fixedly connected to two symmetrically arranged transmission rods (250). The U-shaped end of the second clamping plate (220) is the second abutting surface (220a).

9. A peritoneal dialysis device, employing a bidirectional flow-blocking device for peritoneal dialysis tubing as described in any one of claims 1-8, characterized in that, include: The cartridge fixing compartment (600) has a pipe receiving groove (610) on its side. A cartridge holder (700) is disposed within the cartridge holder compartment (600); A cartridge fixing plate (800) is used to fix the cartridge (900). The cartridge fixing plate (800) is slidably disposed in the cartridge fixing seat (700), and its end is provided with a clamping hole (810) perpendicular to the direction of the pipeline (1000). When the first clamping plate (110) and the second clamping plate (220) move synchronously towards each other, the first clamping plate (110) and the second clamping plate (220) extend into the clamping hole (810) to clamp the pipeline (1000).

10. A peritoneal dialysis device according to claim 9, characterized in that: The cartridge holder (700) is symmetrically provided with guide rails. The cartridge holder (800) is slidably connected to the guide rails and can slide out or be inserted into the cartridge holder (700) relative to the guide rails.

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