Peripheral circulation module for hemodialysis water

Abstract

A water peripheral circulation module for hemodialysis relates to the field of water treatment and comprises two water segregators, a first diaphragm valve connected between the two water segregators and more than one hose connected to a matched water diversion port between the two water segregators, and the middle of the hose is connected with a connector through a second diaphragm valve. Compared with the prior art, the differential pressure regulating valve has the advantages of simple structure, low manufacturing cost and capability of regulating differential pressure.

Description

Technical Field

[0001] This utility model relates to the field of water treatment, and in particular to a terminal circulation module for water used in hemodialysis. Background Technology

[0002] Currently, in hemodialysis, centralized dialysate supply systems primarily use a large circulation pipeline connected in series with each dialysis machine to supply dialysate (or dialysate concentrate) to each machine. When the pipeline needs disinfection or when the dialysate needs to be circulated, a circulation pump within the main unit drives the fluid circulation within the pipeline.

[0003] The problem with this piping layout is that each dialysis machine's suction point requires a relatively long section of tubing to connect to the main circulation tubing in order to guide the diverted pure water from the main circulation tubing to the hemodialysis machine. With this structure, during disinfection, the disinfectant cannot enter this section of tubing through the main circulation tubing, resulting in ineffective disinfection of the tubing. To address this, patent CN202022216120.9 describes a technique that uses a Venturi tube at the suction point of the main circulation tubing. Circulation tubing is connected to both ends of the Venturi tube, and the middle of the circulation tubing is connected to the outlet and then to the hemodialysis machine. This utilizes the pressure difference between the two ends of the Venturi tube to allow the main circulation tubing to enter the circulation tubing. During normal use, the diverted pure water transported by the main circulation tubing can be discharged, while during disinfection, the disinfectant can pass through the main circulation tubing, including the Venturi tube, and the circulation tubing.

[0004] This technology places high demands on the venturi tube to ensure sufficient pressure differential in the circulation pipeline, resulting in high costs and inconvenience in use. Moreover, once the venturi tube structure is determined, the pressure differential in the circulation pipeline is fixed and cannot be adjusted according to changes in the usage environment (such as changes in the number of liquid sampling points, which can lead to significant changes in pressure differential). Summary of the Invention

[0005] The purpose of this invention is to provide a simple, low-cost, pressure differential adjustment-enabled peripheral circulation module for water in hemodialysis.

[0006] The present invention for a peripheral circulation module for water used in hemodialysis is implemented as follows: it includes two water distributors, a first diaphragm valve connected between the two water distributors, and one or more hoses connected to matching water outlets between the two water distributors. The middle part of the hose is connected to a connector through a second diaphragm valve.

[0007] In use, the two water distributors of the diversion module of this invention are connected in series to the main circulation pipeline. By adjusting the opening of the first diaphragm valve, the water pressure difference between the two water distributors can be adjusted, so that part of the fluid in the main circulation pipeline completes the main circulation through the two water distributors and the first diaphragm valve, while the other part of the fluid is introduced into the hose from the front water distributor and then flows to the rear water distributor to complete the main circulation. If the connector is connected to the hemodialysis machine and the second diaphragm valve is open, the fluid (ultrapure water) flowing through the hose flows to the hemodialysis machine.

[0008] When disinfection is required, in addition to a portion of the disinfectant flowing through the two water distributors and the first diaphragm valve to complete the large circulation and disinfect the two water distributors and the first diaphragm valve, a portion of the disinfectant also flows through the hose to disinfect the hose, thereby achieving disinfection of the diversion module.

[0009] Due to the structure of the distributor, fluid will not stagnate and form dead zones when flowing through it. Similarly, the diaphragm valve, due to its structure, will also not have dead zones. By adjusting the diaphragm valve, the opening of the diaphragm valve can be adjusted, thereby regulating the pressure difference between the two distributors. This ensures that there is sufficient head to supply ultrapure water to the hemodialysis machine, and that the disinfectant can flow through all parts of the pipeline during disinfection to achieve comprehensive disinfection. Moreover, there will be no dead zones where bacteria can grow during use.

[0010] Compared with existing technologies, this invention has the advantages of simple structure, low manufacturing cost, and the ability to adjust differential pressure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the peripheral circulation module for water used in hemodialysis according to this utility model;

[0012] Figure 2 This is a schematic diagram of the large circulation pipeline;

[0013] Figure 3 This is a schematic diagram of the diaphragm valve.

[0014] Explanation of reference numerals in the attached diagram: A - Terminal circulation module for water used in hemodialysis; 1 - Water distributor; 2 - First diaphragm valve; 3 - Water outlet; 4 - Hose; 5 - Second diaphragm valve; 6 - Connector; 7 - Water treatment system; 8 - Disinfection system; 9 - Hemodialysis machine; 10 - Valve; 11 - Arc-shaped protrusion; 12 - Diaphragm. Detailed Implementation

[0015] The present invention, a peripheral circulation module for water used in hemodialysis, will now be described in further detail with reference to the accompanying drawings and embodiments:

[0016] like Figure 1As shown, the peripheral circulation module for water used in hemodialysis of this utility model is implemented as follows: it includes two water distributors 1, a first diaphragm valve 2 connected between the two water distributors 1, and one or more hoses 4 connected to matching water outlets 3 between the two water distributors 1. The middle part of the hose 4 is connected to the connector 6 through the second diaphragm valve 5.

[0017] like Figure 2 As shown, in use, the two water distributors 1 of the terminal circulation module A for hemodialysis water of this utility model are connected in series to the main circulation pipeline. The water treatment system 7 supplies ultrapure water to the main circulation pipeline, or the disinfection system 8 supplies disinfected water to the main circulation pipeline. By adjusting the opening of the first diaphragm valve 2, the water pressure difference between the two water distributors 1 can be adjusted, so that part of the fluid in the main circulation pipeline completes the main circulation through the two water distributors 1 and the first diaphragm valve 2, and the other part of the fluid is introduced into the hose 4 from the front water distributor 1 and then flows to the rear water distributor 1 to complete the main circulation. If the connector 6 is connected to the hemodialysis machine 9 and the second diaphragm valve 5 is open, the fluid (ultrapure water) flowing through the hose 4 flows to the hemodialysis machine 9.

[0018] When disinfection is required, in addition to a portion of the disinfectant flowing through the two water separators 1 and the first diaphragm valve 2 to complete the large circulation and disinfect the two water separators 1 and the first diaphragm valve 2, a portion of the disinfectant also flows through the hose 4 to disinfect the hose 4, thereby achieving the disinfection of the diversion module A of the centralized hemodialysis fluid supply.

[0019] like Figure 3 As shown, the basic structure of the diaphragm valve is that the bottom of the valve 10 is flat or has an arc-shaped protrusion 11. The diaphragm 12, driven by power, moves from top to bottom in the form of a downward convex arc surface to achieve the effect of closing or adjusting the opening. Since the bottom of the valve 10 is flat or has an arc-shaped protrusion 11, and the diaphragm 12 is also a downward convex arc surface, there are no dead corners when the fluid passes through the valve 10, thus avoiding the growth of bacteria due to fluid stagnation.

[0020] Preferably, flanges 13 are provided at both ends of the distributor 1. The diameter of one end of the distributor 1 matches the inlet and outlet diameters of the first diaphragm valve 2, and the diameter of the other end of the distributor 1 matches the diameter of the main circulation pipeline. The flange and diameter matching design ensures that the fluid in the main circulation pipeline flows through the distributor 1 in a laminar flow manner, without stagnation or dead zones.

Claims

1. A water end-circulation module for hemodialysis, characterized in that, The device comprises two water separators, a first diaphragm valve connected between the two water separators, one or more hoses connected to the matched water outlet of the two water separators, and the middle part of the hose is connected to the joint through a second diaphragm valve.

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