Pipeline switching device and purification system

Abstract

The utility model relates to the technical field of blood purification, and particularly discloses a pipeline switching device and a purification system.In the pipeline switching device, a power piece is arranged on a fixing assembly; the fixing assembly is provided with a first side wall and a second side wall. The rotating shaft is connected with the output end of the power piece; the eccentric pressing rod is arranged at the end, away from the power piece, of the rotating shaft and can rotate among the first position, the second position and the middle position, the distance between the eccentric pressing rod and the first side wall is reduced in the process that the middle position rotates to the first position, and the distance between the eccentric pressing rod and the first side wall is reduced in the process that the middle position rotates to the second position. By means of the arrangement, the pipeline switching device is low in cost, small in occupied space, small in sound in the rotating process, suitable for a quiet environment and beneficial to rest of a patient.

Description

Technical Field

[0001] The utility model relates to the technical field of blood purification equipment, in particular to a pipeline switching device and a purification system. Background Art

[0002] Continuous blood purification equipment (CRRT) is a device that draws the patient's blood out of the body and passes it through a purification system (dialysis filter, perfusion device, etc.) to remove certain pathogenic substances and purify the blood to achieve the purpose of treating the disease.

[0003] According to the principle diagram of continuous venovenous hemofiltration (CVVH), it is understood that the CRRT device uses a set of extracorporeal circulation pipelines powered by a blood pump to draw the patient's blood from the body, flow through the dialysis filter, remove some of the pathogenic substances, and then flow back into the body. The pathogenic substances are separated by the dialysis filter, powered by the filter pump, and discharged into the waste liquid bag for collection. In order to balance the pathogenic substances in the patient's body, the replacement fluid can be connected to the front or rear interface of the dialysis filter to better balance the treatment effect. Usually, the doctor decides whether the replacement fluid is connected from the front (before the dialysis filter) or from the back (after the dialysis filter). The operator needs to manually change the access port, and at the same time, the information of the front replacement or rear replacement needs to be entered in the operation interface to inform the CRRT device, and the device will make corresponding flow rate adjustments. However, during manual operation, there is a possibility that the operator does not connect the pipeline to the corresponding interface in time, resulting in the treatment effect not meeting the requirements, and there will be deviations in the treatment results, affecting the patient's treatment. In the prior art, two pipelines are set up, one of which is connected at the front and the other is connected at the back, and solenoid valves are set on the two pipelines to achieve selective flow of the two pipelines. However, two solenoid valves are required, and the cost is high, the space occupied is large, and the noise generated during operation is loud, which affects the patient's rest and is not conducive to the patient's recovery.

[0004] Therefore, it is urgent to study a pipeline switching device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a pipeline switching device and a purification system to solve the problem in the prior art that the pipeline is not connected to the corresponding interface in time, which affects the treatment effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A pipeline switching device, comprising:

[0008] a fixing assembly having a first side wall and a second side wall;

[0009] A power member, arranged on the fixed assembly;

[0010] A rotating shaft connected to the output end of the power member;

[0011] An eccentric pressure rod is arranged at one end of the rotating shaft away from the power member. During the rotation process of the rotating shaft, the eccentric pressure rod is driven to rotate between a first position, a second position and a release position. The distance between the eccentric pressure rod at the first position and the first side wall is a first distance, the distance between the eccentric pressure rod at the second position and the second side wall is a second distance, the distance between the eccentric pressure rod at the release position and the first side wall is a first release distance, and the distance between the eccentric pressure rod at the release position and the second side wall is a second release distance. The first distance is smaller than the first release distance, and the second distance is smaller than the second release distance.

[0012] As an optional technical solution of a pipeline switching device, the pipeline switching device includes a stop assembly, and when the eccentric pressure rod is located at one of the first position, the second position and the release position, the eccentric pressure rod can be stopped by the stop assembly.

[0013] As an optional technical solution for a pipeline switching device, the stop assembly includes a stop member and a notch arranged circumferentially of the rotating shaft. The stop member is arranged on the fixed assembly, and the stop end of the stop member can approach or move away from the axis of the rotating shaft. When the stop end approaches the axis of the rotating shaft, it can be inserted into the notch and prevent the rotating shaft from rotating.

[0014] As an optional technical solution of the pipeline switching device, the stopper includes a spring sheet, both ends of which are fixed to the fixing assembly, and the middle part of the spring sheet has an arc-shaped portion protruding toward the axis of the rotating shaft, the arc-shaped portion can be away from or close to the axis of the rotating shaft, and the arc-shaped portion can be inserted into the notch when it is close to the axis of the rotating shaft; or

[0015] The stopper comprises a ball screw, which is fixed to the fixing assembly, and a steel ball of the ball screw can be close to or away from the axis of the rotating shaft. When the steel ball is close to the axis of the rotating shaft, it can be inserted into the notch.

[0016] As an optional technical solution for a pipeline switching device, the pipeline switching device includes a crimping ring, which is sleeved and rotatably disposed on the eccentric pressure rod.

[0017] As an optional technical solution for a pipeline switching device, the fixed component includes a base and a support frame, the support frame is arranged on the base, the support frame has a pipeline channel, the pipeline channel passes through the support frame along an axial direction perpendicular to the rotating shaft, the first side wall is arranged on one side of the pipeline channel, and the second side wall is arranged on the other side of the pipeline channel.

[0018] As an optional technical solution for a pipeline switching device, the pipeline switching device includes a Hall sensor and a magnet. Three of the Hall sensors are arranged on the fixed component and are spaced apart around the axis of the rotating shaft. The magnet is arranged on the rotating shaft. When the magnet triggers the three Hall sensors, the eccentric pressure rod is located at the first position, the second position and the release position respectively.

[0019] As an optional technical solution for a pipeline switching device, the fixing component includes a vibration-damping flange and a mounting flange, the vibration-damping flange and the mounting flange are fixedly connected to each other, the power component is arranged on a side of the vibration-damping flange away from the mounting flange, the vibration-damping flange is provided with a vibration-damping through hole, the mounting flange is provided with a mounting through hole, the rotating shaft passes through the mounting through hole and the vibration-damping through hole and is connected to the output end of the power component.

[0020] As an optional technical solution for a pipeline switching device, the pipeline switching device includes a grounding piece, the mounting flange is made of a conductive material, and the grounding piece is connected to the mounting flange.

[0021] A purification system comprises a displacement piece, a dialysis filter and a pipeline switching device as described in any one of the above items, wherein the displacement piece is connected to two pipelines, one of which is connected to the inlet side of the dialysis filter, and the other is connected to the outlet side of the dialysis filter, and of the two pipelines, one is clamped between the eccentric pressure rod and the first side wall, and the other is clamped between the eccentric pressure rod and the second side wall.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides a pipeline switching device and a purification system. The pipeline switching device includes a fixed component, a rotating shaft and an eccentric pressure rod. Under the action of a power piece, the rotating shaft rotates, thereby driving the eccentric pressure rod to rotate between a first position, a second position and a released position. When the eccentric pressure rod rotates from the released position to the first position, the distance between the eccentric pressure rod and the first side wall becomes smaller. When the eccentric pressure rod rotates from the released position to the second position, the distance between the eccentric pressure rod and the first side wall becomes smaller, so that two pipelines can be respectively arranged between the eccentric pressure rod and the first side wall and between the eccentric pressure rod and the second side wall. When the eccentric pressure rod is in the released position, the two pipelines are connected. When the eccentric pressure rod rotates to the first position, one of the pipelines is clamped and cut off, and the other pipeline is released and connected. When the eccentric pressure rod rotates to the second position, the stop states of the two pipelines are opposite, so that one pipeline switching device can complete the on-off operation of the two pipelines. The utility model has low cost, small occupied space, and small noise during the rotation process. It is suitable for a quiet environment and is conducive to the rest of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of the pipeline switching device in the first perspective in an embodiment of the utility model;

[0025] Figure 2 An exploded view of the pipeline switching device in the embodiment of the utility model;

[0026] Figure 3 This is a structural schematic diagram of the pipeline switching device from a second perspective in an embodiment of the utility model;

[0027] Figure 4 for Figure 3 The cross-section along the AA direction;

[0028] Figure 5 This is a partial view of the pipeline switching device in the embodiment of the utility model from a third viewing angle;

[0029] Figure 6 A partial diagram of the pipeline switching device in the embodiment of the utility model from a second viewing angle;

[0030] Figure 7 It is a partial diagram of the pipeline switching device in the fourth viewing angle in the embodiment of the utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the pipeline switching device in the embodiment of the utility model, and the eccentric pressure rod is in the release position;

[0032] Fig. 9 This is a schematic diagram of the structure of the pipeline switching device in the embodiment of the utility model, where the eccentric pressure rod is located in the first position;

[0033] Fig.10It is a structural schematic diagram of the pipeline switching device in the embodiment of the utility model, and the eccentric pressure rod is located in the second position.

[0034] In the figure:

[0035] 1000, first pipeline; 2000, second pipeline;

[0036] 100, base; 110, vibration-damping flange; 120, mounting flange; 121, grounding member; 122, circuit board; 123, Hall sensor; 125, first stopper; 126, second stopper;

[0037] 200. Power parts;

[0038] 300, support frame; 310, first side wall; 320, second side wall; 330, pipeline channel;

[0039] 400, rotating shaft; 410, notch; 420, magnet; 430, sealing ring; 440, limiting part;

[0040] 500, eccentric pressure rod; 510, crimping ring;

[0041] 600, stopper; 610, first spring piece; 611, first arc-shaped portion; 620, second spring piece. DETAILED DESCRIPTION

[0042] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] Continuous blood purification equipment (CRRT) is a device that draws the patient's blood out of the body and passes it through a purification system (dialysis filter, perfusion device, etc.) to remove certain pathogenic substances and purify the blood to achieve the purpose of treating the disease. The advantage of CRRT is that it does not interfere too much with hemodynamics and can steadily remove water, solutes and metabolic waste. It is widely used in clinical practice and is more common in nephrology, hepatology and ICU. The main treatment modes include continuous venovenous hemofiltration (CVVH), continuous venovenous hemodialysis (CVVHD), continuous venovenous hemodiafiltration (CVVHDF), slow continuous ultrafiltration (SCUF), plasma exchange (PE), hemoperfusion (HP), plasma adsorption (PA), continuous plasma filtration adsorption (CPFA), plasma separation adsorption system (FPSA), molecular adsorption recirculation system (MARS), single albumin pass dialysis (SPAD), double filtration plasma exchange (DFPP), repeated albumin dialysis (RAD), plasma diafiltration (PDF), double plasma adsorption (DPMAS), etc.

[0047] According to the principle diagram of continuous venovenous hemofiltration (CVVH), it is understood that the CRRT device uses a set of extracorporeal circulation pipelines powered by a blood pump to draw the patient's blood from the body, flow through the dialysis filter, remove some of the pathogenic substances, and then flow back into the body. The pathogenic substances are separated by the dialysis filter, powered by the filter pump, and discharged into the waste liquid bag for collection. In order to balance the pathogenic substances in the patient's body, the replacement fluid can be connected to the front or rear interface of the dialysis filter to better balance the treatment effect. Usually, the doctor decides whether the replacement fluid is connected to the front (from the front of the dialysis filter) or the back (from the back of the dialysis filter). The operator needs to manually change the access port, and at the same time, the information of the front replacement or rear replacement needs to be entered in the operation interface to inform the CRRT device, and the device will make corresponding flow rate adjustments. However, during manual operation, there is a possibility that the operator does not connect the pipeline to the corresponding interface in time, resulting in the treatment effect not meeting the requirements, and there will be deviations in the treatment results, affecting the patient's treatment. In the prior art, two pipelines are set up, one of which is connected at the front and the other at the back, and solenoid valves are set on the two pipelines to achieve selective flow of the two pipelines. However, two solenoid valves are required, and the cost is high, the space occupied is large, and the noise generated during operation is loud, which affects the patient's rest.

[0048] To solve the above problems, refer to Figures 1 to 10As shown, the present embodiment provides a pipeline switching device, which includes a fixed component, a power piece 200, a rotating shaft 400 and an eccentric pressure rod 500, wherein the fixed component includes a base 100 and a support frame 300, the power piece 200 is arranged on the base 100; the support frame 300 is arranged on the base 100, and has a first side wall 310 and a second side wall 320; the rotating shaft 400 is rotatably arranged on the base 100, and is connected to the output end of the power piece 200; the eccentric pressure rod 500 is arranged at one end of the rotating shaft 400 away from the power piece 200, and the axis of the eccentric pressure rod 500 is located at the axis of the rotating shaft 400 On one side of the line, the rotating shaft 400 rotates, driving the eccentric pressure rod 500 to rotate between the first position, the second position and the release position, the distance between the eccentric pressure rod 500 at the first position and the first side wall 310 is the first distance, the distance between the eccentric pressure rod 500 at the second position and the second side wall 320 is the second distance, the distance between the eccentric pressure rod 500 at the release position and the first side wall 310 is the first release distance, the distance between the eccentric pressure rod 500 at the release position and the second side wall 320 is the second release distance, the first distance is smaller than the first release distance, and the second distance is smaller than the second release distance.

[0049] The above-mentioned arrangement enables the two pipelines to be respectively arranged between the eccentric pressure rod 500 and the first side wall 310 and between the eccentric pressure rod 500 and the second side wall 320, that is, one pipeline is arranged between the eccentric pressure rod 500 and the first side wall 310, and the other pipeline is arranged between the eccentric pressure rod 500 and the second side wall 320. When the eccentric pressure rod 500 is in the released position, it is convenient to install the pipeline. When the eccentric pressure rod 500 is rotated to the first position, one of the pipelines is clamped and cut off, and the other pipeline is released and connected. When the eccentric pressure rod 500 is rotated to the second position, the stop states of the two pipelines are opposite, so that one pipeline switching device can complete the on-off operation of the two pipelines. It has low cost, small space occupation, and low noise during the rotation process. It is suitable for a quiet environment and is conducive to the patient's rest.

[0050] Specifically, the two pipelines are positioned as a first pipeline 1000 and a second pipeline 2000, wherein the first pipeline 1000 is arranged between the eccentric pressure rod 500 and the first side wall 310, and the second pipeline 2000 is arranged between the eccentric pressure rod 500 and the second side wall 320. When the eccentric pressure rod 500 rotates to the first position, the first pipeline 1000 is clamped and cut off, the second pipeline 2000 is released and connected, and the replacement fluid is connected from the back of the dialysis filter. When the eccentric pressure rod 500 rotates to the second position, the second pipeline 2000 is clamped and cut off, the first pipeline 1000 is released and connected, and the replacement fluid is connected from the front of the dialysis filter.

[0051] The support frame 300 is provided with a support hole, the rotating shaft 400 is passed through the support hole, and a sealing ring 430 is provided between the rotating shaft 400 and the support hole. The rotating shaft 400 is provided with a limit portion 440, and the base 100 is provided with a first stop portion 125 and a second stop portion 126. When the eccentric pressure rod 500 rotates to the first position, the limit portion 440 abuts against the first stop portion 125, and when the eccentric pressure rod 500 rotates to the second position, the limit portion 440 abuts against the second stop portion 126.

[0052] In some embodiments, the support frame 300 has a pipeline channel 330, which runs through the support frame 300 along an axial direction perpendicular to the rotation axis 400, the first side wall 310 is provided on one side of the pipeline channel 330, and the second side wall 320 is provided on the other side of the pipeline channel 330. The above arrangement makes it easy to install the two pipelines and improves the convenience of use. Specifically, the pipeline channel 330 is a U-shaped groove structure, and the opening is away from the base 100.

[0053] In some embodiments, the pipeline switching device includes a stop assembly, and the eccentric pressure rod 500 at the first position, the second position and the release position can be stopped by the stop assembly. The above arrangement allows the eccentric pressure rod 500 to remain at the corresponding position when the power member 200 stops rotating, so that when one pipeline is a passage and the other pipeline is cut off, the power member 200 can be powered off, thereby saving electric energy.

[0054] In some embodiments, the stopper assembly includes a stopper 600 and a notch 410 provided in the circumferential direction of the rotating shaft 400. The stopper 600 is provided on the base 100, and the stopper end of the stopper 600 can be close to or away from the axis of the rotating shaft 400. When the stopper end is close to the axis of the rotating shaft 400, it can be inserted into the notch 410 and prevent the rotating shaft 400 from rotating. The above arrangement facilitates the installation of the stopper 600, and the rotation shaft 400 is reliably limited by inserting in a direction perpendicular to the rotating shaft 400, so that the eccentric pressure rod 500 can be stably in the corresponding first position, second position or third position.

[0055] Specifically, the stopper 600 includes an elastic sheet, both ends of which are fixed to the base 100, and the middle part of the elastic sheet has an arc-shaped portion protruding toward the axis of the rotating shaft 400, and the arc-shaped portion can be away from or close to the axis of the rotating shaft 400, and can be inserted into the notch 410 when the arc-shaped portion is close to the axis of the rotating shaft 400. The above arrangement can not only complete the limit of the rotating shaft 400, but also does not require the provision of other driving members, and only relies on the elastic force of the elastic member to complete the stopping and release of the rotating member. Specifically, the arc-shaped portion is inserted into the notch 410, and when the power member 200 is powered off, it can prevent the rotating shaft 400 from continuing to rotate; when the power member 200 is in motion, under the squeezing action of the rotating shaft 400, the elastic sheet is deformed so that the arc-shaped portion moves out of the notch 410.

[0056] In some embodiments, there are several spring pieces, and several spring pieces are stacked. The above arrangement makes the elastic force of the stopper 600 adjustable, which is convenient for adapting to different application scenarios. Specifically, the stopper 600 includes a first spring piece 610 and several second spring pieces 620; the first spring piece 610 is close to the notch 410, and the first arc portion 611 of the first spring piece 610 can be inserted into the notch 410. The arc of the second arc portion of the second spring piece 620 is larger and greater than the opening length of the notch 410, and it cannot enter the notch 410. With the above arrangement, the force of the first arc portion 611 to produce deformation can be adjusted, so as to adapt to the torque generated by the power piece 200, that is, the greater the torque required when tightening the pipeline, the greater the torque required for the power piece 200, and the more the number of second spring pieces 620 required. In this embodiment, there is one first spring piece 610 and three second spring pieces 620.

[0057] In some embodiments, the stopper 600 includes a ball screw, which is fixed to the base 100, and the steel ball of the ball screw can be close to or away from the axis of the rotating shaft 400. When the steel ball is close to the axis of the rotating shaft 400, it can be inserted into the notch 410. The ball screw has a mature structure, good durability, and is easy to assemble.

[0058] In order to avoid sliding friction between the eccentric pressure rod 500 and the pipeline, which may cause pipeline wear, in some embodiments, the pipeline switching device includes a crimping ring 510. The crimping ring 510 is sleeved and rotatably disposed on the eccentric pressure rod 500.

[0059] Regarding the installation method of the crimping ring 510, specifically, one end of the eccentric pressure rod 500 has a screw and the other end has a stop block, the eccentric pressure rod 500 is screwed to the rotating shaft 400, the crimping ring 510 is passed through the eccentric pressure rod 500, and both ends are limited to the end of the rotating shaft 400 and the stop block, and the outer diameter of the stop block is larger than the inner diameter of the crimping ring 510. The above arrangement can achieve a stable connection of the crimping ring 510 and can achieve relative rotation with the eccentric pressure rod 500.

[0060] In order to improve the smoothness of rotation between the eccentric pressure rod 500 and the crimping ring 510 , in some embodiments, a bearing is provided between the eccentric pressure rod 500 and the crimping ring 510 .

[0061] When in use, the eccentric pressure rod 500 can be accurately stopped at the first position or the second position, which is the key to compressing one of the pipelines and switching the flow direction of the liquid. To this end, the pipeline switching device includes a Hall sensor 123 and a magnet 420. The Hall sensor 123 is arranged on the base 100, and three magnets 420 are arranged on the rotating shaft 400 around the axis of the rotating shaft 400. When the three magnets 420 trigger the Hall sensor 123, the eccentric pressure rod 500 is respectively located at the first position, the second position and the release position. It should be noted that the pipeline switching device also includes a controller, and the controller is in communication connection with the Hall sensor 123. When the magnet 420 triggers the Hall sensor 123, an induction signal can be generated. After receiving the induction signal, the controller controls the power member 200 to stop rotating. Specifically, the three magnets 420 are defined as a first magnet, a release magnet, and a second magnet, wherein the first magnet, the release magnet, and the second magnet are sequentially spaced around the axis of the rotating shaft 400, and when the eccentric pressure rod 500 is in the release position, the release magnet triggers the Hall sensor 123, when the eccentric pressure rod 500 is in the first position, the first magnet triggers the Hall sensor 123, and when the eccentric pressure rod 500 is in the second position, the second magnet triggers the Hall sensor 123. The angle between the first magnet and the release magnet is 90°, the angle between the release magnet and the second magnet is 90°, and the angle between the first magnet and the second magnet is 180 degrees.

[0062] In other embodiments, three Hall sensors 123 and a magnet 420 may be provided. The three Hall sensors 123 are provided on the base 100 and are spaced around the axis of the rotating shaft 400. The magnet 420 is provided on the rotating shaft 400. When the magnet 420 triggers the three Hall sensors 123, the eccentric pressure rod 500 is located at the first position, the second position and the release position. Specifically, the three Hall sensors 123 are respectively the first sensor, the middle sensor and the second sensor. When the eccentric pressure rod 500 is located at the release position, the magnet 420 triggers the middle sensor. When the eccentric pressure rod 500 is located at the first position, the magnet 420 triggers the first sensor. When the eccentric pressure rod 500 is located at the second position, the magnet 420 triggers the second sensor. Among them, the angle between the middle sensor and the first sensor is 90°, the angle between the middle sensor and the second sensor is 90°, and the angle between the first sensor and the second sensor is 180 degrees. The circuit board 122 is provided on the mounting flange 120, and the Hall sensor 123 is provided on the circuit board 122. In some embodiments, three magnets 420 and three Hall sensors 123 may be provided, and when the eccentric pressure rod 500 is in the release position, the three magnets 420 correspond to the three Hall sensors 123. The angle between the first magnet and the release magnet is 90 degrees, the angle between the release magnet and the second magnet is 90 degrees, and the angle between the first magnet and the second magnet is 180 degrees.

[0063] The vibration generated by the power member 200 during use may affect the patient's rest, thereby affecting the rehabilitation effect. In some embodiments, the base 100 includes a vibration-damping flange 110 and a mounting flange 120, the vibration-damping flange 110 and the mounting flange 120 are fixedly connected, the power member 200 is arranged on the side of the vibration-damping flange 110 away from the mounting flange 120, the support frame 300 is arranged on the side of the mounting flange 120 away from the vibration-damping flange 110, the vibration-damping flange 110 is provided with a vibration-damping through hole, the mounting flange 120 is provided with a mounting through hole, the rotating shaft 400 passes through the mounting through hole and the vibration-damping through hole and is connected to the output end of the power member 200. Among them, the power member 200 is a motor, and the vibration-damping flange 110 can reduce the noise caused by the rotation of the motor.

[0064] To improve the safety of use, in some embodiments, the pipeline switching device includes a grounding member 121, the mounting flange 120 is a conductive material, and the grounding member 121 is connected to the mounting flange 120. The grounding member 121 is a conductive material, such as copper, aluminum, or other metal materials. When in use, the mounting flange 120 is connected to the ground through the grounding member 121.

[0065] This embodiment also provides a purification system, which includes a displacement piece, a dialysis filter, and a pipeline switching device of any of the above embodiments. The displacement piece is connected to two pipelines, one of which is connected to the inlet side of the dialysis filter, and the other is connected to the outlet side of the dialysis filter. Of the two pipelines, one is sandwiched between the eccentric pressure rod 500 and the first side wall 310, and the other is sandwiched between the eccentric pressure rod 500 and the second side wall 320. The displacement piece contains a replacement fluid, and the above arrangement enables the replacement fluid to be accurately guided to the inlet side or the outlet side of the dialysis filter under the action of the pipeline switching device. In addition, the above arrangement has low cost, small space occupation, and low noise during rotation, and is suitable for a quiet environment, which is conducive to the patient's rest.

[0066] Specifically, the two pipelines are a first pipeline 1000 and a second pipeline 2000, wherein one end of the first pipeline 1000 and the second pipeline 2000 are both connected to the replacement part, the first pipeline 1000 is clamped between the eccentric pressure rod 500 and the first side wall 310, and the second pipeline 2000 is clamped between the eccentric pressure rod 500 and the first side wall 310.

[0067] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A pipeline switching device, characterized in that: include: a fixing assembly having a first side wall and a second side wall; A power member, arranged on the fixed assembly; A rotating shaft connected to the output end of the power member; An eccentric pressure rod is arranged at one end of the rotating shaft away from the power member. During the rotation process of the rotating shaft, the eccentric pressure rod is driven to rotate between a first position, a second position and a release position. The distance between the eccentric pressure rod at the first position and the first side wall is a first distance, the distance between the eccentric pressure rod at the second position and the second side wall is a second distance, the distance between the eccentric pressure rod at the release position and the first side wall is a first release distance, and the distance between the eccentric pressure rod at the release position and the second side wall is a second release distance. The first distance is smaller than the first release distance, and the second distance is smaller than the second release distance.

2. The pipeline switching device according to claim 1, characterized in that: The pipeline switching device includes a stop assembly, and when the eccentric pressure rod is located at one of the first position, the second position and the release position, the eccentric pressure rod can be stopped by the stop assembly.

3. The pipeline switching device according to claim 2, characterized in that: The stop assembly includes a stop member and a notch arranged in the circumference of the rotating shaft. The stop member is arranged in the fixing assembly, and the stop end of the stop member can approach or move away from the axis of the rotating shaft. When the stop end approaches the axis of the rotating shaft, it can be inserted into the notch and prevent the rotating shaft from rotating.

4. The pipeline switching device according to claim 3, characterized in that: The stopper comprises a spring sheet, both ends of which are fixed to the fixing assembly, and a middle portion of the spring sheet has an arc-shaped portion protruding toward the axis of the rotating shaft, the arc-shaped portion can be away from or close to the axis of the rotating shaft, and the arc-shaped portion can be inserted into the notch when it is close to the axis of the rotating shaft; or The stopper comprises a ball screw, which is fixed to the fixing assembly, and a steel ball of the ball screw can be close to or away from the axis of the rotating shaft. When the steel ball is close to the axis of the rotating shaft, it can be inserted into the notch.

5. The pipeline switching device according to any one of claims 1 to 4, characterized in that: The pipeline switching device comprises a crimping ring, which is sleeved and rotatably arranged on the eccentric pressure rod.

6. The pipeline switching device according to any one of claims 1 to 4, characterized in that: The fixing assembly includes a base and a support frame, the support frame is arranged on the base, the support frame has a pipeline channel, the pipeline channel passes through the support frame along an axial direction perpendicular to the rotating shaft, the first side wall is arranged on one side of the pipeline channel, and the second side wall is arranged on the other side of the pipeline channel.

7. The pipeline switching device according to any one of claims 1 to 4, characterized in that: The pipeline switching device includes a Hall sensor and a magnet. Three of the Hall sensors are arranged on the fixed component and are spaced apart around the axis of the rotating shaft. The magnet is arranged on the rotating shaft. When the magnet triggers the three Hall sensors, the eccentric pressure rod is located at the first position, the second position and the release position respectively.

8. The pipeline switching device according to any one of claims 1 to 4, characterized in that: The fixing assembly includes a vibration-damping flange and a mounting flange, the vibration-damping flange and the mounting flange are fixedly connected, the power piece is arranged on a side of the vibration-damping flange away from the mounting flange, the vibration-damping flange is provided with a vibration-damping through hole, the mounting flange is provided with a mounting through hole, the rotating shaft passes through the mounting through hole and the vibration-damping through hole and is connected to the output end of the power piece.

9. The pipeline switching device according to claim 8, characterized in that: The pipeline switching device includes a grounding piece, the mounting flange is made of a conductive material, and the grounding piece is connected to the mounting flange.

10. A purification system, characterized in that: It includes a displacement part, a dialysis filter and a pipeline switching device as described in any one of claims 1 to 9, wherein the displacement part is connected to two pipelines, one of which is connected to the inlet side of the dialysis filter, and the other is connected to the outlet side of the dialysis filter, and of the two pipelines, one is clamped between the eccentric pressure rod and the first side wall, and the other is clamped between the eccentric pressure rod and the second side wall.

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