Concentrated concentrated solution supply system for hemodialysis machine

Abstract

The invention relates to a concentrated solution supply system for a hemodialysis machine. The concentrated solution supply system comprises a solution preparation unit, a powder feeding unit and a solution storage unit, the liquid preparation unit comprises a liquid preparation barrel and a liquid preparation pipe network, the powder feeding unit comprises a plurality of powder feeding barrels which are arranged in parallel, and the liquid preparation pipe network is arranged between the liquid preparation barrel and the powder feeding barrels; the liquid distribution pipe network is provided with a liquid distribution circulating pump and valve banks corresponding to the powder feeding barrels, and the valve banks are arranged between the liquid distribution circulating pump and the liquid distribution barrels; a filtering unit is arranged at the downstream of the liquid preparation circulating pump and comprises a filtering valve group, a filtering pipeline and a water inlet pipeline are arranged between the filtering valve group and the liquid preparation barrel, and a water inlet electromagnetic valve is arranged at the intersection part of the water inlet pipeline and the filtering pipeline; a water inlet three-way valve is arranged on the water inlet pipeline, and an upward conveying pipeline is arranged between the water inlet three-way valve and the liquid storage unit. According to the invention, the working intensity of technicians can be reduced, automatic operation control is realized, dead space is avoided, and the safety performance is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a centralized concentrated liquid supply system for a hemodialysis machine. Background Art

[0002] Centralized liquid supply equipment is a device used to supply concentrated liquid to the hemodialysis machine. The specific working modes include: liquid preparation state, upward delivery state, liquid supply state, chemical disinfection state, pipeline thermal disinfection state and liquid preparation cleaning state.

[0003] See also Figure 1 The structural diagram of the existing centralized liquid supply equipment is combined with Figure 1 Expand the description of the relevant working mode:

[0004] 1. Liquid preparation state: After water enters the liquid preparation barrel 1a through the electromagnetic valve 4a, the bagged powder enters the liquid preparation barrel 1a, the electric ball valve 15a is closed, and the circulation pump 6a is started for stirring and preparation.

[0005] 2. Upward delivery state: After the liquid preparation is completed, the electric ball valve 15a is opened, the electric ball valve 13a is opened, the solenoid valve 14a is opened, and the prepared concentrated liquid enters the liquid storage barrel 2a.

[0006] 3. Liquid supply status: The concentrated liquid in the liquid storage barrel 2a is supplied to the liquid supply pipeline 9a through the operation of the circulating pump 7a, through the ultraviolet disinfection lamp 19a, the solenoid valve 20a is opened, the heat elimination motor pipeline 22a, and the heating pipeline 23a, and then the concentrated liquid is supplied to multiple dialysis machines, and then returned to the liquid storage barrel 2a after the solenoid valve 8a is opened.

[0007] 4. Chemical disinfection state: the disinfectant stock solution in the disinfectant stock solution tank 3a is sent into the liquid preparation barrel 1a through the peristaltic pump 5a, and after being mixed with water into a disinfectant solution of a specified proportion, the electric ball valve 15a is opened, the electric ball valve 13a is closed, the electric ball valve 16a is opened, and the disinfectant is used to disinfect the liquid preparation tank and pipelines through the circulation pump 6a. After the disinfection is completed, the disinfectant is sent to the liquid storage tank. The disinfectant passes through the circulation pump 7a, the solenoid valve 21a is opened, the solenoid valve 20a and the solenoid valve 8a are closed, and the disinfectant is used to disinfect the liquid storage tank. After the disinfection is completed, the disinfectant is discharged and cleaned.

[0008] 5. Pipeline thermal disinfection status: After the pure water in the liquid storage tank 2a fills the liquid supply pipeline 9a through the circulation pump 7a, the solenoid valve 20a and the solenoid valve 8a are closed, the circulation pump 22a is turned on, the pipeline returns water through the one-way valve 11a, the heater 23a is turned on, and thermal disinfection begins. After the thermal disinfection is completed, flush water to cool down.

[0009] 6. Liquid preparation and cleaning state: After the liquid preparation tank 1a enters water, the water is cleaned along the cleaning pipeline path through the circulation pump 6a, wherein the electric ball valve 15a is opened, the electric ball valve 13a is closed, and the electric ball valve 16a is opened, and water is sprayed out from the top of the liquid preparation tank to clean the liquid preparation barrel and pipeline.

[0010] The existing centralized liquid supply equipment mainly has the following frequent problems:

[0011] 1. During the process of thermal disinfection of pipelines, the circulation pump 22a drives the water circulation in the liquid supply pipeline. It is easy for the circulation pump to have low water intake, resulting in slow water circulation efficiency. At the same time, the internal diaphragms of the solenoid valves 8a and 20a are not closed tightly, and the abnormality cannot be detected, which will cause the circulation pump 22a to suck liquid in vain and the thermal disinfection to exit abnormally.

[0012] 2. During the liquid preparation process, the amount of powder added at a time is small (less than 30 servings each time), and the next powder addition needs to be stirred, dissolved and sent up before it can be carried out. This requires technicians to perform powder addition and liquid preparation operations many times a day, which increases the workload of technicians.

[0013] 3. The membrane housing filter and endotoxin filter need to be replaced frequently.

[0014] 4. There is a dead cavity in the chemical disinfection pipeline, and it needs to be flushed several times after disinfection to flush out the residual disinfectant. At the same time, there is a safety hazard of disinfectant leakage due to the solenoid valve 8a and solenoid valve 20a not being closed tightly. Summary of the invention

[0015] The purpose of this application is to provide a centralized concentrated liquid supply system for a hemodialysis machine, which can solve the above-mentioned technical problems.

[0016] In order to achieve the above-mentioned object, the present invention provides a centralized concentrated liquid supply system for a hemodialysis machine, comprising: a liquid preparation unit, a powder feeding unit and a liquid storage unit;

[0017] The liquid dispensing unit includes a liquid dispensing barrel and a liquid dispensing pipe network, the powder throwing unit includes a plurality of powder throwing barrels arranged in parallel, and the liquid dispensing pipe network is arranged between the liquid dispensing barrel and the powder throwing barrel;

[0018] The liquid distribution network is provided with a liquid distribution circulation pump and a valve group corresponding to each of the powder barrels, and the valve group is arranged between the liquid distribution circulation pump and the liquid distribution barrel;

[0019] A filter unit is provided downstream of the liquid distribution circulation pump, the filter unit includes a filter valve group, a filter pipeline and a water inlet pipeline are provided between the filter valve group and the liquid distribution barrel, and a water inlet solenoid valve is provided at the intersection of the water inlet pipeline and the filter pipeline;

[0020] The water inlet pipeline is provided with a water inlet three-way valve, and an upward delivery pipeline is provided between the water inlet three-way valve and the liquid storage unit.

[0021] In an optional embodiment, the liquid distribution pipeline network includes a water inlet pipeline and a liquid outlet pipeline, the valve group includes a powder bucket electric ball valve arranged on the water inlet pipeline and a powder bucket mixed electric ball valve arranged on the liquid outlet pipeline, the water inlet pipeline and the liquid outlet pipeline are arranged in parallel relative to the multiple powder buckets, and the powder bucket electric ball valve and the powder bucket mixed electric ball valve are respectively arranged corresponding to the powder buckets.

[0022] In an optional embodiment, a liquid preparation circulation pipeline is arranged in parallel between the powder feeding bucket and the liquid preparation bucket, and liquid preparation circulation filters are respectively arranged on the liquid preparation circulation pipelines.

[0023] In an optional embodiment, a liquid dosing circulation inlet pipeline is provided between the liquid dosing circulation pump and the liquid dosing barrel, a liquid dosing barrel drainage pipeline is provided on the liquid dosing circulation inlet pipeline, and a liquid dosing barrel drainage valve is provided on the liquid dosing barrel drainage pipeline.

[0024] In an optional embodiment, the liquid distribution circulation pump is connected to a liquid distribution circulation outlet pipeline, and a liquid distribution delivery electric ball valve is provided on the liquid distribution circulation outlet pipeline. The main pipe connection point of the outlet pipeline on the liquid distribution circulation outlet pipeline is provided upstream of the liquid distribution delivery electric ball valve.

[0025] In an optional embodiment, a liquid preparation electromagnetic heater and an electromagnetic heater outlet thermometer for detecting the liquid outlet temperature are sequentially arranged on the liquid preparation circulation outlet pipeline, and the main pipe connection point of the liquid outlet pipeline on the liquid preparation circulation outlet pipeline is arranged downstream of the electromagnetic heater outlet thermometer.

[0026] In an optional embodiment, the filtration unit includes a cartridge filter disposed downstream of the liquid dispensing and liquid delivery electric ball valve, and a micron filter and an endotoxin filter disposed downstream of the liquid storage unit;

[0027] The filter valve group includes a first filtering four-way electric ball valve arranged between the filter cartridge filter and the micron filter, and a second filtering four-way electric ball valve arranged downstream of the endotoxin filter.

[0028] In an optional embodiment, an upward delivery pipeline is provided with an upward delivery electric ball valve, a liquid storage and inlet three-way electric ball valve is connected downstream of the upward delivery electric ball valve, the second filtering four-way electric ball valve is connected to the dialysis machine concentrated liquid supply pipeline, a liquid supply pipeline return line is provided downstream of the dialysis machine concentrated liquid supply pipeline, the liquid supply pipeline return line merges with the upward delivery pipeline and enters the liquid inlet end of the liquid storage and inlet three-way electric ball valve.

[0029] In an optional embodiment, the liquid storage unit includes a liquid storage barrel, and the liquid storage inlet three-way electric ball valve includes a liquid storage inlet end and a liquid discharge end connected to the liquid storage barrel;

[0030] The bottom of the liquid storage barrel is connected to a liquid delivery pipeline, the liquid delivery pipeline is connected to a liquid storage outlet circulation pump, the outlet pipeline of the liquid storage outlet circulation pump is sequentially provided with a pipeline heat elimination heater and a heat elimination heater outlet thermometer, and the outlet pipeline is connected to the first filtering four-way electric ball valve, so as to be able to deliver the prepared liquid in the liquid storage barrel through the filtering unit into the dialysis machine supply concentrated liquid pipeline;

[0031] The return water line of the liquid supply pipeline is provided with a return water pressure sensor of the liquid supply pipeline, a return water thermometer of the liquid supply pipeline and a one-way valve in sequence, and the connection part between the upper delivery pipeline and the outlet of the one-way valve is provided with a discharge conductivity meter;

[0032] The liquid dispensing barrel is provided with an in-liquid dispensing barrel conductivity meter, and a pipeline conductivity meter is provided upstream of the first filtering four-way electric ball valve.

[0033] In an optional embodiment, a control unit is further included, and the control unit is electrically connected to the electric ball valve, thermometer, pressure sensor and conductivity meter included in different units.

[0034] The centralized concentrated liquid supply system for hemodialysis machines in the present invention adopts a combination of a powder feeding bucket and a liquid preparation bucket. By adding a powder feeding bucket and a matching electric ball valve, the technician can freely choose to feed 20-120 portions of powder at a time. Compared with the existing centralized liquid supply, which can only feed 20 or 30 portions of powder each time and requires multiple powder feeding operations a day, the technician's work intensity is reduced.

[0035] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a structural schematic diagram of a centralized liquid supply device in the prior art;

[0038] Figure 2 It is a schematic diagram of the structure of the centralized concentrated liquid supply system for the centralized hemodialysis machine in this application.

[0039] icon:

[0040] 1-water inlet solenoid valve; 2-liquid dispensing barrel; 3-conductivity meter in the liquid dispensing barrel; 4-water inlet three-way valve; 5-drain valve of the liquid dispensing barrel; 6-liquid dispensing circulation pump; 7-liquid dispensing electromagnetic heater; 8-electromagnetic heater outlet thermometer; 9-liquid dispensing barrel thermometer; 10-liquid dispensing circulation filter; 11-powder dispensing barrel A; 12-powder dispensing barrel B; 13-powder dispensing barrel B electric ball valve; 14-powder dispensing barrel B mixed electric ball valve; 15-powder dispensing barrel A electric ball valve; 16-powder dispensing barrel A mixed electric ball valve; 17-liquid dispensing liquid delivery electric ball valve; 18-filter element filter; 19-pipeline conductivity meter; 20-liquid storage barrel; 21-ultraviolet disinfection lamp; 22-discharge conductivity meter; 23-check valve; 24-liquid storage inlet three-way electric ball valve; 25-liquid storage barrel drain valve; 26-liquid storage outlet circulation pump; 27-pipeline thermal degassing heater; 28-thermal degassing heater outlet thermometer; 29-liquid supply pipeline return water thermometer; 30-dialysis machine concentrate supply pipeline; 31-first filter four-way electric ball valve; 32-micron filter; 33-endotoxin filter; 34-second filter four-way electric ball valve; 35-upward electric ball valve; 36-liquid supply pipeline return water pressure sensor. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply 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 this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] The centralized concentrated liquid supply system for hemodialysis machine in the present application is mainly used for the preparation, storage and chemical disinfection of concentrated liquid for hemodialysis machine, and specifically promotes the automated operation of the centralized concentrated liquid supply system by improving the piping structure and valve settings of different units.

[0045] See also Figure 2 The centralized concentrated liquid supply system for the hemodialysis machine of the present invention comprises: a liquid preparation unit, a powder feeding unit and a liquid storage unit;

[0046] The liquid dispensing unit includes a liquid dispensing barrel 2 and a liquid dispensing pipe network, the powder throwing unit includes a plurality of powder throwing barrels arranged in parallel, and the liquid dispensing pipe network is arranged between the liquid dispensing barrel 2 and the powder throwing barrel;

[0047] The liquid distribution network is provided with a liquid distribution circulation pump 6 and a valve group corresponding to each of the powder barrels, and the valve group is provided between the liquid distribution circulation pump 6 and the liquid distribution barrel 2;

[0048] A filter unit is provided downstream of the liquid distribution circulation pump 6, and the filter unit includes a filter valve group. A filter pipeline and a water inlet pipeline are provided between the filter valve group and the liquid distribution barrel 2, and a water inlet solenoid valve 1 is provided at the intersection of the water inlet pipeline and the filter pipeline;

[0049] The water inlet pipeline is provided with a water inlet three-way valve 4, and an upward delivery pipeline is provided between the water inlet three-way valve 4 and the liquid storage unit.

[0050] Through the liquid preparation barrel 2 included in the liquid preparation unit and the multiple powder feeding barrels arranged in parallel included in the powder feeding unit, the liquid preparation barrel 2 and the powder feeding barrel can cooperate with each other. Combined with the liquid preparation pipeline network arranged between the powder feeding barrel and the liquid preparation barrel 2, the operating number of the powder feeding barrels can be appropriately adjusted according to the required amount of concentrated liquid, so that the technician can freely choose to feed 20-120 servings of powder at a time. Compared with the existing centralized liquid supply that can only feed 20 or 30 servings of powder each time, multiple powder feeding operations a day are avoided, and the work intensity of technicians is reduced.

[0051] The liquid preparation circulation pump 6 can realize water intake and internal circulation of the preparation solution, and can realize water intake and liquid preparation during the liquid preparation process through the valve group corresponding to the powder feeding bucket.

[0052] The liquid can be filtered through the filter unit. At the same time, the filter pipeline and water inlet pipeline set between the filter valve group and the liquid dispensing barrel 2 can realize filtering and water intake during the liquid dispensing process. At the same time, combined with the water inlet solenoid valve 1 set at the intersection of the water inlet pipeline and the filter pipeline, normal water intake and backwashing of the filter unit can be realized.

[0053] The water inlet three-way valve 4 arranged on the water inlet pipeline and the upward delivery pipeline arranged between the water inlet three-way valve 4 and the liquid storage unit can control the flow direction of the incoming water and realize the delivery in different directions of liquid preparation and liquid storage, thereby meeting the needs of different processes.

[0054] In one specific embodiment, the liquid distribution network includes a water inlet pipeline and a liquid outlet pipeline, the valve group includes a powder bucket electric ball valve arranged on the water inlet pipeline and a powder bucket mixed electric ball valve arranged on the liquid outlet pipeline, the water inlet pipeline and the liquid outlet pipeline are arranged in parallel relative to the multiple powder buckets, and the powder bucket electric ball valve and the powder bucket mixed electric ball valve are respectively arranged corresponding to the powder buckets.

[0055] By setting the water inlet pipeline and the liquid outlet pipeline in parallel with the powder bucket, and combining the powder bucket electric ball valve and the powder bucket mixed electric ball valve, the operation of the powder bucket can be controlled in a targeted manner, and targeted independent control of different powder buckets can be achieved. The amount of liquid dispensed in the powder bucket can also be controlled to meet the configuration of different liquid dispensed amounts.

[0056] A liquid preparation circulation pipeline is arranged in parallel between the powder throwing bucket and the liquid preparation bucket 2, so that the solution in the powder throwing bucket can enter the liquid preparation bucket 2. Combined with the liquid preparation circulation filter 10 respectively arranged on the liquid preparation circulation pipeline, the solution in the liquid preparation circulation process can be filtered.

[0057] A liquid dispensing circulation inlet pipeline is provided between the liquid dispensing circulation pump 6 and the liquid dispensing barrel 2, so that the solution in the liquid dispensing barrel 2 can enter the liquid dispensing circulation pump 6 for circulating the solution.

[0058] At the same time, a liquid dispensing barrel 2 drainage pipeline is arranged on the liquid dispensing circulation liquid inlet pipeline, and a liquid dispensing barrel 2 drainage pipeline is arranged on the liquid dispensing barrel 2 drainage pipeline. In the backwashing process of the liquid dispensing cleaning, the backwashing waste liquid in the liquid dispensing barrel 2 can be discharged.

[0059] From the perspective of the liquid outlet circulation of the liquid preparation cycle, the liquid preparation circulation pump 6 is connected to a liquid preparation circulation outlet pipeline, and a liquid preparation and liquid delivery electric ball valve 17 is provided on the liquid preparation circulation outlet pipeline, which can deliver the prepared concentrated liquid to the downstream output.

[0060] Furthermore, by setting the main pipe connection point of the liquid outlet pipeline on the liquid distribution circulation outlet pipeline upstream of the liquid distribution and liquid delivery electric ball valve 17, the solution can be internally circulated between the liquid distribution barrel 2 and the powder feeding barrel when the liquid distribution and liquid delivery electric ball valve 17 is closed.

[0061] A liquid dispensing electromagnetic heater 7 and an electromagnetic heater outlet thermometer 8 for detecting the liquid outlet temperature are sequentially arranged on the liquid dispensing circulation outlet pipeline. The main pipe connection point of the liquid outlet pipeline on the liquid dispensing circulation outlet pipeline is arranged downstream of the electromagnetic heater outlet thermometer 8. A liquid dispensing barrel thermometer 9 is also arranged on the liquid dispensing barrel 2.

[0062] By providing the liquid preparation electromagnetic heater 7, the liquid can be heated during the preparation process to accelerate the dissolution process. The temperature of the liquid is not higher than 25° C. during heating.

[0063] In another specific embodiment, the filtration unit includes a cartridge filter 18 disposed downstream of the liquid dispensing and liquid delivery electric ball valve 17, and a micron filter 32 and an endotoxin filter 33 disposed downstream of the liquid storage unit.

[0064] Specifically, the cartridge filter 18 is mainly used to filter the configured solution and then send it to the liquid storage unit. Furthermore, the micron filter 32 and the endotoxin filter 33 are mainly used to filter the concentrated liquid in the liquid storage barrel 20 again, and finally send the filtered concentrated liquid to the dialysis machine to supply the concentrated liquid pipeline 30.

[0065] The filter element filter 18 includes a 1um filter element filter 18 and a 0.2um filter element filter 18 which are arranged in sequence, and can effectively filter the configured solution.

[0066] The filter valve group includes a first filter four-way electric ball valve 31 arranged between the filter element filter 18 and the micron filter 32, and a second filter four-way electric ball valve 34 arranged downstream of the endotoxin filter 33. By controlling the flow direction of the filter four-way electric ball valve, different flow paths can be controlled to meet the different flow paths of the solution under different working conditions.

[0067] Specifically, after passing through the first filtering four-way electric ball valve 31, the configured solution flows through the pipeline between the first filtering four-way electric ball valve 31 and the second filtering four-way electric ball valve 34, and then passes through the filtering pipeline downstream of the second filtering four-way electric ball valve 34 and the water inlet pipeline, and then enters the liquid storage barrel 20 via the upward delivery pipeline.

[0068] Before supplying the concentrated liquid pipeline 30 to the dialysis machine, the liquid in the liquid storage barrel 20 is pressurized by the liquid storage outlet circulation pump 26, enters the micron filter 32 and the filter element filter 18 through the valve path of the first filtering four-way electric ball valve 31 opposite to the liquid delivery direction, and is sent to the concentrated liquid pipeline 30 of the dialysis machine through the valve path of the second filtering four-way electric ball valve 34 opposite to the liquid delivery direction.

[0069] An upward delivery pipeline is provided with an upward delivery electric ball valve 35, and a liquid storage and inlet three-way electric ball valve 24 is connected to the downstream of the upward delivery electric ball valve 35. The second filtering four-way electric ball valve 34 is connected to the dialysis machine concentrated liquid supply pipeline 30, and a liquid supply pipeline return pipeline is provided downstream of the dialysis machine concentrated liquid supply pipeline 30. The liquid supply pipeline return pipeline is merged with the upward delivery pipeline and enters the liquid inlet end of the liquid storage and inlet three-way electric ball valve 24.

[0070] The above arrangement enables the delivery of the prepared liquid to the liquid storage barrel 20 , the delivery of the stored liquid to the dialysis machine supply concentrated liquid pipeline 30 , and the return of the solution in the dialysis machine supply concentrated liquid pipeline 30 to the liquid storage barrel 20 .

[0071] The liquid storage unit in this embodiment includes a liquid storage barrel 20, and the liquid storage inlet three-way electric ball valve 24 includes a liquid storage inlet end and a liquid discharge end connected to the liquid storage barrel 20;

[0072] The bottom of the liquid storage barrel 20 is connected to a liquid delivery pipeline, and the liquid delivery pipeline is connected to a liquid storage outlet circulation pump 26. The outlet pipeline of the liquid storage outlet circulation pump 26 is sequentially provided with a pipeline heat removal heater 27 and a heat removal heater outlet thermometer 28, and the outlet pipeline is connected to the first filtering four-way electric ball valve 31, so as to be able to send the liquid in the liquid storage barrel 20 through the filtering unit into the dialysis machine supply concentrated liquid pipeline 30;

[0073] The return water line of the liquid supply line is provided with a return water pressure sensor 36, a return water thermometer 29 and a one-way valve 23 in sequence, and a discharge conductivity meter 22 is provided at the connection between the upper delivery line and the outlet of the one-way valve 23;

[0074] The liquid dispensing barrel 2 is provided with an in-liquid dispensing barrel conductivity meter 3 , and a pipeline conductivity meter 19 is provided upstream of the first filtering four-way electric ball valve 31 .

[0075] The centralized concentrated liquid supply system for the hemodialysis machine also includes a control unit, which is electrically connected to the electric ball valve, thermometer, pressure sensor and conductivity meter included in different units, and can realize automatic control, reduce manual intervention and improve operation efficiency.

[0076] The centralized concentrate supply system for hemodialysis machines mainly includes different processes during operation. The following is an explanation of the different process conditions.

[0077] 1. Liquid preparation and delivery: During working hours, before water intake, first put the bagged powder into powder bucket A11 and powder bucket B12, then lock the powder bucket, keep the water inlet three-way valve 4 closed to the downstream delivery end, open the water inlet solenoid valve 1, open the electric ball valve 15 of powder bucket A, and let water enter the liquid preparation bucket 2 and powder bucket A11. After water intake is completed, close the water inlet solenoid valve 1 and the electric ball valve 15 of powder bucket A;

[0078] Open the mixing electric ball valve 16 of the powder barrel A, and start the liquid mixing circulation pump 6 to fully mix the powder in the powder barrel A11 with the water in the liquid mixing barrel 2;

[0079] After the Chinese medicine powder in the powder bucket A11 is dissolved, the mixing electric ball valve 16 of the powder bucket A is closed, the electric ball valve 15 of the powder bucket A and the liquid preparation and delivery electric ball valve 17 are opened, and the first filtering four-way electric ball valve 31 and the second filtering four-way electric ball valve 34 remain in a closed state. From the attached drawing, the first filtering four-way electric ball valve 31 remains in a state of conduction from top to right, and the second filtering four-way electric ball valve 34 remains in a state of conduction from bottom to left, and the liquid preparation circulation pump 6 is started, so that the liquid preparation passes through the first filtering four-way electric ball valve 31 and the second filtering four-way electric ball valve 34 after passing through the filter element filter 18.

[0080] The cartridge filter 18 is fully mixed with the residual water in the filter pipeline and the water inlet pipeline, and double judged by the conductivity meter 3 in the liquid preparation barrel and the pipeline conductivity meter 19 between the first filtering four-way electric ball valve 31 and the cartridge filter 18. After the conductivity is judged to be qualified, the water inlet three-way valve 4 is opened to the delivery port of the upward pipeline, the upward electric ball valve 35 is opened, the discharge port of the liquid storage inlet three-way electric ball valve 24 is kept closed, the liquid preparation circulation pump 6 is turned on, and the prepared concentrated liquid enters the liquid storage barrel 20.

[0081] After the upward delivery is completed, the liquid continues to dissolve the bagged powder in the powder bucket B12.

[0082] 2. Chemical disinfection:

[0083] 1) After get off work, put the disinfectant concentrate into the powder bucket A11 and close the powder bucket, select the chemical disinfection mode, and automatically enter the chemical disinfection process. The electric ball valve 15 of powder bucket A and the electric ball valve 13 of powder bucket B are opened. At the same time, the water inlet solenoid valve 1 is opened to let water into the liquid preparation bucket 2, powder bucket A11 and powder bucket B12. Then, the electric ball valve 15 of powder bucket A and the electric ball valve 13 of powder bucket B are closed, and the mixing electric ball valve 14 of powder bucket B and the mixing electric ball valve 16 of powder bucket A are opened. The liquid preparation circulation pump 6 is turned on to chemically disinfect the liquid preparation bucket 2, powder bucket and liquid preparation pipeline network.

[0084] 2) After the chemical disinfection at this stage is completed, open the electric ball valve 15 of powder bucket A and the electric ball valve 13 of powder bucket B, close the mixing electric ball valve 14 of powder bucket B and the mixing electric ball valve 16 of powder bucket A, open the liquid distribution and liquid delivery electric ball valve 17 and the first filtering four-way electric ball valve 31 and the second filtering four-way electric ball valve 34. From the accompanying drawings, the first filtering four-way electric ball valve 31 remains in a state of conduction from top to left, and the second filtering four-way electric ball valve 34 remains in a state of conduction from top to left, and the liquid distribution circulation pump 6 is started to perform chemical disinfection of the filter element filter 18, the micron filter 32, the endotoxin filter 33, the water inlet pipeline and the liquid distribution bucket 2.

[0085] 3) After the second part of the disinfection is completed, open the water inlet three-way valve 4, the upward delivery electric ball valve 35 and the discharge end of the liquid storage and inlet three-way electric ball valve 24 to disinfect the upward delivery pipeline. Finally, the disinfectant is discharged from the discharge end of the liquid storage and inlet three-way electric ball valve 24.

[0086] 4) Clean after disinfection is completed.

[0087] 3. Thermal disinfection of pipelines: The liquid storage barrel 20 is made of stainless steel. Open the first filtering four-way electric ball valve 31 and the second filtering four-way electric ball valve 34. From the attached figure, the first filtering four-way electric ball valve 31 remains in a state of conduction from bottom to right, and the second filtering four-way electric ball valve 34 remains in a state of conduction from bottom to left. The thermal disinfection solution does not pass through the micron filter 32 and the endotoxin filter 33.

[0088] The discharge end of the liquid storage inlet three-way electric ball valve 24 remains closed, the liquid storage inlet end is opened, the liquid storage outlet circulation pump 26 works, the pipeline thermal disinfection heater 27 heats the water, and the liquid storage barrel 20 and the dialysis machine concentrated liquid supply pipeline 30 are thermally disinfected. The disinfected hot water finally enters the liquid storage barrel 20 through the filter pipeline, the water inlet pipeline and the upper delivery pipeline. After the final disinfection is completed, the hot water is discharged through the liquid storage barrel drain valve 25.

[0089] After drainage is completed, water is directly introduced into the liquid storage barrel 20 through the water inlet pipeline and the upward delivery pipeline. The liquid storage inlet end of the liquid storage inlet three-way electric ball valve 24 remains open, and the liquid storage outlet circulation pump 26 is started to cool the pipelines passing through the thermal disinfection process and the dialysis machine concentrate supply pipeline 30.

[0090] 4. Liquid preparation and cleaning: Clean the liquid preparation and pipelines at the beginning and end of get off work to reduce the residual bacteria growth in the concentrated liquid. At the beginning of the cleaning procedure, the water inlet three-way valve 4 is opened, the upper feed electric ball valve 35 is closed, and the second filter four-way electric ball valve 34 is closed. From the attached figure, the second filter four-way electric ball valve 34 remains in a state of being conducted from the right to the top, the first filter four-way electric ball valve 31 is opened, and also remains in a state of being conducted from the right to the top, the liquid preparation and delivery electric ball valve 17 and the liquid preparation bucket drain valve 5 are opened, and the water inlet solenoid valve 1 is opened, and the filter element filter 18, the micron filter 32 and the endotoxin filter 33 are backwashed, and the backwashing waste liquid is discharged through the liquid preparation bucket drain valve 5.

[0091] After the backwash is completed, water flows into the liquid dispensing tank 2, and then the liquid dispensing process is carried out to flush the powder barrel and pipeline.

[0092] Compared with the prior art, the centralized concentrated liquid supply system for hemodialysis machines in the present invention adopts a combination of a powder feeding bucket and a liquid preparation bucket 2. By adding a powder feeding bucket and a matching electric ball valve, the technician can freely choose to feed 20-120 portions of powder at a time. Compared with the previous centralized liquid supply, which can only feed 20 or 30 portions of powder each time and requires multiple powder feeding operations a day, the technician's work intensity is reduced.

[0093] The liquid storage barrel 20 is made of stainless steel, and the liquid storage barrel 20 is disinfected during the pipeline heat disinfection process. At the same time, the liquid storage barrel 20 contains a 1.2-meter ultraviolet disinfection lamp 21, and the double disinfection effect is better than the previous single disinfection effect.

[0094] The start time of pipeline thermal disinfection can be set through the control unit, and it will be automatically carried out after get off work, which can achieve the purpose of high-frequency disinfection.

[0095] A liquid supply line return water pressure sensor 36 is installed on the return water line of the dialysis machine supply line. The signal is fed back to the PLC through the pressure sensor, and the working frequency of the liquid storage and discharge circulation pump 26 is adjusted through PID to adjust the pressure of the liquid supply line, so as to avoid adding an additional pressure reducing valve for each dialysis machine interface. At the same time, the equipment is adjusted to a high frequency during processes such as top liquid emptying to reduce the process time.

[0096] Compared with the original centralized concentrated liquid supply structure which only performs filter backwashing, the filter of the present invention can realize the function of cleaning the filter element 18, the micron filter 32 and the endotoxin filter 33 at the same time by changing the direction of the first filtering four-way electric ball valve 31 and the second filtering four-way electric ball valve 34 during filter backwashing, and the cleaning frequency can reach twice a day, which prolongs the service life of the filter element and endotoxin, and also avoids the influence of frequent blockage on the upper liquid and the dialysis machine supply.

[0097] Due to the large volume of the liquid storage tank, the total amount of disinfectant during chemical disinfection of the original structure is determined by the volume of the liquid distribution tank. When the liquid storage tank is chemically disinfected, only the middle and lower parts of the tank can be soaked in disinfectant, and the chemical spray disinfection effect on the upper part of the liquid storage tank is not as good as the thermal disinfection of the entire tank body, and the cleaning time after chemical disinfection is longer than thermal disinfection. At the same time, there is a safety hazard of residual disinfectant in the original structure chemical disinfection pipeline.

[0098] The whole structure has no dead cavity, which can ensure full coverage of disinfection. The number of flushing times after chemical disinfection is reduced compared with the original structure, and the flushing effect is cleaner. At the same time, the disinfectant is put into the liquid preparation barrel 2 for disinfection, without adding a disinfection barrel and a suction pump separately.

[0099] Through the combined application of three conductivity meters, the concentrated liquid is dissolved and sent up to determine whether it meets the requirements. If liquid B is emptied after get off work that day, the residual liquid in the liquid supply pipeline will be pushed out with water to prevent bacteria growth for a long time at night. After adding the discharge conductivity meter 22, it can be determined whether all the water in the liquid supply pipeline of liquid B is completely pushed out the next day, which will not reduce the final concentrated liquid concentration of the liquid supply pipeline and the liquid storage tank 20.

[0100] The centralized concentrated liquid supply system for the hemodialysis machine of the present invention can realize the function of adaptive adjustment of the pressure of the concentrated liquid supply pipeline 30 of the hemodialysis machine, and can realize double disinfection by thermal disinfection of the stored liquid and ultraviolet light, and can realize high-frequency thermal disinfection in the automatic operation state.

[0101] Double isolation protection during disinfection, the two four-way ball valves are both double-detected and switched to the position at the same time before circulation, which will not cause the disinfectant to enter the dialysis machine supply pipeline and cause pollution. At the same time, when the upward pipeline is disinfected and discharged, in addition to the water inlet three-way valve 4, the upward electric ball valve 35 and the storage liquid inlet three-way electric ball valve 24 are in place, the abnormal discharge of disinfectant will cause the liquid level of the storage tank 20 to change, and the liquid level detection can also be detected.

[0102] The combined application of three conductivity meters can not only perform dual conductivity value detection, but also provide support for the system to achieve fully automatic operation.

[0103] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0104] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A centralized concentrated liquid supply system for a hemodialysis machine, characterized in that: include: Liquid preparation unit, powder dosing unit and liquid storage unit; The liquid dispensing unit includes a liquid dispensing barrel and a liquid dispensing pipe network, the powder throwing unit includes a plurality of powder throwing barrels arranged in parallel, and the liquid dispensing pipe network is arranged between the liquid dispensing barrel and the powder throwing barrel; The liquid distribution network is provided with a liquid distribution circulation pump and a valve group corresponding to each of the powder barrels, and the valve group is arranged between the liquid distribution circulation pump and the liquid distribution barrel; A filter unit is provided downstream of the liquid distribution circulation pump, the filter unit includes a filter valve group, a filter pipeline and a water inlet pipeline are provided between the filter valve group and the liquid distribution barrel, and a water inlet solenoid valve is provided at the intersection of the water inlet pipeline and the filter pipeline; The water inlet pipeline is provided with a water inlet three-way valve, and an upward delivery pipeline is provided between the water inlet three-way valve and the liquid storage unit.

2. The centralized concentrated liquid supply system for hemodialysis machine according to claim 1, characterized in that: The liquid distribution network includes a water inlet pipeline and a liquid outlet pipeline, the valve group includes a powder bucket electric ball valve arranged on the water inlet pipeline and a powder bucket mixed electric ball valve arranged on the liquid outlet pipeline, the water inlet pipeline and the liquid outlet pipeline are arranged in parallel with multiple powder buckets, and the powder bucket electric ball valve and the powder bucket mixed electric ball valve are respectively arranged corresponding to the powder buckets.

3. The centralized concentrated liquid supply system for hemodialysis machine according to claim 1, characterized in that: A liquid preparation circulation pipeline is arranged in parallel between the powder throwing bucket and the liquid preparation bucket, and liquid preparation circulation filters are respectively arranged on the liquid preparation circulation pipelines.

4. The centralized concentrated liquid supply system for hemodialysis machine according to claim 1, characterized in that: A liquid dispensing circulation inlet pipeline is arranged between the liquid dispensing circulation pump and the liquid dispensing barrel, a liquid dispensing barrel drainage pipeline is arranged on the liquid dispensing circulation inlet pipeline, and a liquid dispensing barrel drainage valve is arranged on the liquid dispensing barrel drainage pipeline.

5. The centralized concentrated liquid supply system for hemodialysis machine according to claim 1, characterized in that: The liquid distribution circulation pump is connected to a liquid distribution circulation outlet pipeline, a liquid distribution liquid delivery electric ball valve is arranged on the liquid distribution circulation outlet pipeline, and the main pipe connection point of the outlet pipeline on the liquid distribution circulation outlet pipeline is arranged upstream of the liquid distribution liquid delivery electric ball valve.

6. The centralized concentrated liquid supply system for hemodialysis machine according to claim 5, characterized in that: The liquid distribution circulation outlet pipeline is provided with a liquid distribution electromagnetic heater and an electromagnetic heater outlet thermometer for detecting the outlet liquid temperature in sequence, and the main pipe connection point of the liquid outlet pipeline on the liquid distribution circulation outlet pipeline is provided downstream of the electromagnetic heater outlet thermometer.

7. The centralized concentrated liquid supply system for hemodialysis machine according to claim 5, characterized in that: The filtration unit comprises a cartridge filter arranged downstream of the liquid dispensing and liquid delivery electric ball valve, and a micron filter and an endotoxin filter arranged downstream of the liquid storage unit; The filter valve group includes a first filtering four-way electric ball valve arranged between the filter cartridge filter and the micron filter, and a second filtering four-way electric ball valve arranged downstream of the endotoxin filter.

8. The centralized concentrated liquid supply system for hemodialysis machine according to claim 7, characterized in that: An upward delivery pipeline is provided with an upward delivery electric ball valve, and a liquid storage and inlet three-way electric ball valve is connected to the downstream of the upward delivery electric ball valve. The second filtering four-way electric ball valve is connected to the dialysis machine concentrated liquid supply pipeline, and a liquid supply pipeline return line is provided downstream of the dialysis machine concentrated liquid supply pipeline. The liquid supply pipeline return line merges with the upward delivery pipeline and enters the liquid inlet end of the liquid storage and inlet three-way electric ball valve.

9. The centralized concentrated liquid supply system for hemodialysis machine according to claim 8, characterized in that: The liquid storage unit comprises a liquid storage barrel, and the liquid storage and liquid inlet three-way electric ball valve comprises a liquid storage and liquid inlet end and a liquid discharge end connected to the liquid storage barrel; The bottom of the liquid storage barrel is connected to a liquid delivery pipeline, the liquid delivery pipeline is connected to a liquid storage outlet circulation pump, the outlet pipeline of the liquid storage outlet circulation pump is sequentially provided with a pipeline heat elimination heater and a heat elimination heater outlet thermometer, and the outlet pipeline is connected to the first filtering four-way electric ball valve, so as to be able to send the prepared liquid in the liquid storage barrel through the filtering unit into the dialysis machine for concentrated liquid pipeline; The return water line of the liquid supply pipeline is provided with a return water pressure sensor of the liquid supply pipeline, a return water thermometer of the liquid supply pipeline and a one-way valve in sequence, and the connection part between the upper delivery pipeline and the outlet of the one-way valve is provided with a discharge conductivity meter; The liquid dispensing barrel is provided with an in-liquid dispensing barrel conductivity meter, and a pipeline conductivity meter is provided upstream of the first filtering four-way electric ball valve.

10. The centralized concentrated liquid supply system for hemodialysis machine according to claim 1, characterized in that: It also includes a control unit, which is electrically connected to the electric ball valve, the thermometer, the pressure sensor and the conductivity meter included in the different units.

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