An automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis

Abstract

The present invention relates to an automatic steam disinfection system for concentrated liquid centralized distribution and supply for hemodialysis, which includes a stirring tank and a liquid storage tank. The stirring tank is provided with a liquid preparation assembly. The liquid outlet of the stirring tank is communicated with the liquid storage tank through a pipeline, and the liquid storage tank is a buffer tank. The automatic steam disinfection system for concentrated liquid centralized distribution and supply further includes a heat disinfection heater. The liquid inlet of the heat disinfection heater is communicated with the liquid discharge port of the liquid storage tank through a pipeline, and the steam outlet of the heat disinfection heater is communicated with the middle part of the liquid storage tank through a pipeline. Control valves are arranged at both the liquid inlet and the steam outlet of the heat disinfection heater. The present invention can achieve full and thorough heat disinfection of the liquid supply system and is convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and particularly relates to an automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis. Background Art

[0002] Due to the continuous development of the dialysis industry and the expansion of the scale of hemodialysis, a dialysis center can now receive 100 dialysis patients at a time. The traditional method is to manually transport the dialysis solution. One device requires two barrels of dialysis concentrate, namely A and B, and the dialysis solution needs to be replaced during use. In this way, not only the quality of the original solution cannot be controlled, but also the risk of contamination is increased. With the development of technology and the continuous improvement of people's living standards, dialysis patients also have higher requirements for the quality of dialysis. In recent years, manufacturers have been exploring centralized liquid supply systems, but most of them are not perfect. Since the current centralized liquid supply is still in its infancy, the industry technology is uneven, there is no relevant international standard, and there are many problems.

[0003] Firstly, the existing centralized liquid supply systems are prone to liquid leakage, the liquid preparation is not precise enough, the liquid preparation accuracy is unstable, the prepared liquid is prone to proportion imbalance, and more seriously, it will cause the hemodialysis machine to alarm and stop, endangering life. Secondly, the conveying pressure is difficult to control. In the case of a large number of beds in a dialysis center, it is difficult to achieve balanced liquid supply. Finally, the liquid supply pipeline of the equipment is prone to contamination, especially the disinfection process is complex and difficult to clean thoroughly, with residues. Even when doing evacuation, compressed air is required, and it is difficult to ensure that the compressed air is definitely clean. Although many manufacturers' systems have an automatic disinfection function, the disinfection effect is extremely poor and the duration is not sufficient. The extremely long pipeline is difficult to clean thoroughly, and there is a risk of disinfectant residue. When using thermal disinfection, due to the too long pipeline, the temperature loss at the end is large, and the end cannot reach the disinfection temperature, so the thermal disinfection is not thorough enough. Summary of the Invention

[0004] The present invention aims at at least one technical problem existing in the prior art, and provides an automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis, which can achieve sufficient and thorough thermal disinfection of the liquid supply system and is convenient to operate.

[0005] The technical solution for the present invention to solve the above technical problems is as follows: An automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis includes a stirring tank and a liquid storage tank. The stirring tank is provided with a liquid preparation component. The liquid outlet of the stirring tank is communicated with the liquid storage tank through a pipeline, and the liquid storage tank is a buffer tank. The automatic steam disinfection system for centralized preparation and supply of concentrated solution further includes a thermal disinfection heater. The liquid inlet of the thermal disinfection heater is communicated with the liquid discharge port of the liquid storage tank through a pipeline, and the steam outlet of the thermal disinfection heater is communicated with the middle part of the liquid storage tank through a pipeline. Control valves are arranged at both the liquid inlet and the steam outlet of the thermal disinfection heater.

[0006] Based on the above technical solutions, the present invention can be further improved as follows.

[0007] Furthermore, the centralized liquid supply and automatic steam disinfection system further includes a liquid pushing and discharging valve for discharging steam, and the liquid pushing and discharging valve is arranged on the system pipeline.

[0008] Furthermore, a liquid storage discharge valve is arranged at the liquid discharge port of the liquid storage tank. The liquid storage discharge valve is a three-way valve, and two ends of the three-way valve are respectively communicated with the liquid discharge port of the liquid storage tank and the liquid inlet of the thermal disinfection heater, and the third end is a liquid discharge port.

[0009] Preferably, the thermal disinfection heater includes a liquid passing pipeline and a heating component arranged outside the liquid passing pipeline.

[0010] Preferably, the liquid storage tank is further configured with a filtering and circulating pipeline. One end of the filtering and circulating pipeline is communicated with the liquid discharge port of the liquid storage tank, and the other end is communicated with the liquid inlet end of the liquid storage tank; a first filter element is arranged on the filtering and circulating pipeline for filtering the liquid in the liquid storage tank.

[0011] Preferably, a circulation valve is arranged at the steam outlet of the thermal disinfection heater. The circulation valve is a three-way valve, and three ends of the three-way valve are respectively communicated with the filtering and circulating pipeline, the steam outlet of the thermal disinfection heater, and the middle part of the liquid storage tank.

[0012] Preferably, the centralized liquid supply and automatic steam disinfection system further includes a pressure sensor, and the pressure sensor is arranged in the system pipeline.

[0013] Preferably, the centralized liquid supply and automatic steam disinfection system further includes a controller. The pressure sensor, the liquid storage discharge valve, and the circulation valve are all electrically connected to the controller, and the controller is used to control the opening and closing and the opening state of the liquid storage discharge valve and the circulation valve.

[0014] Preferably, the centralized liquid supply and automatic steam disinfection system further includes a controller. The liquid pushing and discharging valve is electrically connected to the controller, and the controller is used to control the opening and closing and the opening state of the liquid pushing and discharging valve.

[0015] Furthermore, the centralized liquid supply and automatic steam disinfection system further includes a second filter element, and the second filter element is arranged on the connecting pipeline between the stirring tank and the liquid storage tank.

[0016] The beneficial effects of the present invention are as follows: The present invention uses an external thermal disinfection heater for steam thermal disinfection, which can utilize the steam pressure to empty the system pipeline and will not introduce new pollution sources; through steam thermal disinfection, the present invention can fully disinfect the system pipeline without leaving disinfection dead corners, ensuring thorough disinfection. Description of the Drawings

[0017] Figure 1It is a schematic structural diagram of the present invention;

[0018] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0019] 1. Stirring tank, 2. Liquid storage tank, 3. Thermal disinfection heater, 4. Liquid supply pump, 5. Liquid storage discharge valve, 6. Liquid pushing discharge valve, 7. Circulation valve, 8. First filter element, 9. Second filter element, 10. Temperature compensator, 11. Liquid preparation pump, 12. Conductivity sensor, 13. Spray valve, 14. Water inlet valve, 15. Liquid preparation discharge valve, 16. Magnetic stirrer. Specific embodiments

[0020] The principles and features of the present invention will be described below with reference to the attached drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0021] As Figure 1 shown, an automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis designed by the present invention includes a stirring tank 1 and a liquid storage tank 2; the stirring tank 1 is used for preparing liquid, the liquid storage tank 2 is used for storing liquid temporarily, and the liquid outlet of the stirring tank 1 is connected to the liquid storage tank 2 through a pipeline.

[0022] The automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis of the present invention further includes a thermal disinfection heater 3. The liquid inlet of the thermal disinfection heater 3 is connected to the liquid discharge port of the liquid storage tank 2 through a pipeline, and the steam outlet of the thermal disinfection heater 3 is also connected to the middle part of the liquid storage tank 2 through a pipeline.

[0023] The core of the automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis of the present invention lies in the pipeline control part. The pipeline control part consists of a controller and several valves, and the whole system is a fully sealed system.

[0024] A liquid preparation discharge valve 15 is provided at the liquid outlet of the stirring tank 1. The liquid preparation discharge valve 15 is a three-way valve, which is provided with a connection port and a discharge port. One end of the connection pipeline between the stirring tank 1 and the liquid storage tank 2 is connected to the connection port of the liquid preparation discharge valve 15, and the other end is connected to the liquid inlet end of the liquid storage tank 2. An inlet valve 14 and a liquid preparation pump 11 are sequentially arranged on the connection pipeline between the stirring tank 1 and the liquid storage tank 2. The inlet valve 14 is also a three-way valve, which is arranged between the liquid preparation pump 11 and the liquid preparation discharge valve 15 and is provided with a water inlet.

[0025] A liquid storage discharge valve 5 is provided at the liquid discharge port of the liquid storage tank 2. The liquid storage discharge valve 5 is also a three-way valve, which is provided with a connection port and a discharge port. The liquid inlet of the thermal disinfection heater 3 is connected to the connection port of the liquid storage discharge valve 5 through a pipeline.

[0026] The above valves are all electrically controlled valves and are electrically connected to the controller. The controller can be a programmable controller. Specifically, a CPU-SR60 controller produced by Siemens can be selected. The automatic control of the system is realized by pre-editing the valve control program. The valve control program is a control program for controlling the opening and closing and / or the opening and closing mode of each valve edited according to the working principle of the present invention.

[0027] In the centralized liquid supply system of the prior art, it is very difficult to clean thoroughly when using chemical disinfection, and disinfectant is likely to remain; while when using heat disinfection, it is very difficult to cover the entire pipeline. After research, the inventor found that the main reason for the above problems is that it is difficult to achieve system drainage. Although some manufacturers are equipped with compressed air devices to use compressed air to achieve system drainage, after research, the inventor found that it is very difficult to ensure the cleanliness of compressed air, and new pollution will be introduced. And the pollution of compressed air is the core reason why it is very difficult to achieve thorough disinfection in the existing system, and this technical problem has not been publicly reported at present.

[0028] The present invention effectively solves the technical problem of taking both drainage and pollution into account by externally connecting a heat disinfection heater 3. By externally connecting the heat disinfection heater 3 in the present invention, a set of heated circulation pipelines is arranged beside the liquid storage tank 2. During use, the disinfection steam generated by the heat disinfection heater 3 can be used to boost the pressure of the entire system pipeline. Using the pressure generated by the steam, the residual liquid in the liquid storage tank 2 and the pipeline is pushed out for discharge to achieve drainage. No new pollution source is introduced during the whole process, achieving both drainage and taking the pollution problem into account at the same time.

[0029] The present invention also provides an improved technical solution. In the improved technical solution, the liquid storage tank 2 is further equipped with a filtered circulation pipeline. One end of the filtered circulation pipeline is communicated with the connection port of the liquid storage and discharge valve 5, and the other end is communicated with the liquid inlet end of the liquid storage tank 2. A first filter element 8 is arranged on the filtered circulation pipeline for filtering the liquid in the liquid storage tank 2.

[0030] Preferably, a circulation valve 7 can be arranged at the steam outlet end of the heat disinfection heater 3. The circulation valve 7 also adopts a three-way valve, one end is communicated with the steam outlet of the heat disinfection heater 3, the other end is communicated with the liquid inlet end of the filtered circulation pipeline, and the third end is communicated with the middle part of the liquid storage tank 2.

[0031] Preferably, a liquid pushing and discharging valve 6 can be arranged on the filtered circulation pipeline for discharging the disinfection steam after disinfection.

[0032] In order to solve the problem of balanced liquid supply, the present invention is equipped with a liquid supply pump 4 at the liquid discharge port of the liquid storage tank 2. The liquid supply pump 4 preferably adopts a variable frequency pump and can be connected to the connecting pipeline between the heat disinfection heater 3 and the liquid storage and discharge valve 5. In this way, it can not only provide power for filtration but also provide power for liquid supply.

[0033] The above-mentioned liquid supply pump 4, circulation valve 7, and liquid pushing and discharging valve 6 are also electrically connected to the controller.

[0034] A pressure sensor can be set in the liquid supply system. The pressure sensor is electrically connected to the controller. The pressure sensor is used to monitor the liquid supply pressure of the system in real time. When the pressure is insufficient, the liquid supply pump 4 is turned on to increase the pressure. A liquid level sensor can also be set in the liquid storage tank 2, which is also electrically connected to the controller. In this way, self-flow liquid supply can be adopted when the liquid level is relatively high, and the liquid supply pump 4 is turned on to increase the pressure when the liquid level is relatively low.

[0035] To solve the problem of accurate liquid preparation in the present invention, a conductivity sensor 12 is set on the connecting pipeline between the mixing tank 1 and the liquid storage tank 2. The conductivity sensor 12 is electrically connected to the controller and is used to monitor the conductivity of the liquid preparation in real time, so as to judge whether the liquid preparation is accurate. If the conductivity is abnormal, the controller controls the relevant valves to cut off the connecting pipeline between the mixing tank 1 and the liquid storage tank 2, and then opens it after adjusting the liquid preparation.

[0036] To ensure safety, a second filter element 9 can also be set on the connecting pipeline between the mixing tank 1 and the liquid storage tank 2 for filtering the prepared liquid.

[0037] To improve the liquid preparation efficiency, a magnetic stirrer 16 can also be set in the mixing tank 1. The inventor found through research that by adopting water flow stirring in combination with magnetic stirring, the liquid preparation efficiency can be increased by more than 50%, greatly saving the liquid preparation time.

[0038] To ensure that the prepared liquid has a more appropriate temperature during dialysis, the mixing tank 1 is also equipped with a temperature compensation pipeline. One end of the temperature compensation pipeline is communicated with the top of the mixing tank 1, and the other end is communicated with the liquid discharge port of the mixing tank 1. A temperature compensator 10 is set on the temperature compensation pipeline. A temperature sensor is set in the mixing tank 1 to monitor the liquid temperature.

[0039] Preferably, a spray valve 13 can be configured at the position between the liquid preparation pump 11 and the second filter element 9 on the connecting pipeline between the mixing tank 1 and the liquid storage tank 2, and a three-way valve is adopted. One end of the temperature compensation pipeline is communicated with the spray valve 13, and the other end is communicated with the top of the mixing tank 1. The spray valve 13 is respectively communicated with the liquid preparation pump 11, the second filter element 9, and the temperature compensator 10.

[0040] The working principle of the present invention is as follows:

[0041] When the system is running normally:

[0042] First, prepare the liquid. The inlet valve 14 injects liquid A and liquid B into the mixing tank 1 according to the optimal ratio. The spraying valve 13 is closed, and the liquid preparation pump 11 is turned on. Relying on the pressure of the incoming liquid, a swirling flow is formed in the mixing tank 1 to achieve water flow stirring. At the same time, the magnetic stirrer 16 is also turned on for magnetic stirring. During this process, the drain port of the liquid preparation discharge valve 15 is closed. When preparing the liquid, the temperature sensor in the mixing tank 1 monitors the temperature in real time. If the temperature is not suitable, after the liquid preparation is completed, the spraying valve 13 is opened to connect both ends of the temperature compensator 10 and the liquid preparation pump 11, and the liquid preparation pump 11 is used to pump the liquid for circulation to adjust the liquid temperature to a suitable state.

[0043] Then, perform slow storage of the liquid. Close one end of the spraying valve 13 connected to the temperature compensator 10, open the connecting pipeline between the mixing tank 1 and the storage tank 2, and use the liquid preparation pump 11 to pump the prepared liquid into the storage tank 2 for buffering. During this process, the conductivity sensor 12 monitors the conductivity of the liquid in real time. If the conductivity is abnormal, close the spraying valve 13 and re-perform the liquid preparation operation. When pumping the prepared liquid in the mixing tank 1 into the storage tank 2, the liquid will pass through the second filter element 9 for filtration.

[0044] Finally, perform liquid infusion. Open the storage tank discharge valve 5, and convey the liquid to the dialysis terminal in a self-flow feeding manner. During this process, the liquid level sensor in the storage tank 2 monitors the liquid level in real time. If the liquid level is lower than the limit value, turn on the feeding pump 4 to increase the pressure for feeding.

[0045] When system disinfection is required:

[0046] First, turn on the thermal disinfection heater 3, close the drain port of the storage tank discharge valve 5, and let the liquid in the storage tank flow through the thermal disinfection heater 3 to be heated to form steam.

[0047] Secondly, perform evacuation. Open the circulation valve 7 to convey the steam into the storage tank 2, and then open the drain ports of the storage tank discharge valve 5 and the liquid preparation discharge valve 15. Use the steam pressure to evacuate the liquid in the storage tank 2 and the mixing tank 1, and at the same time evacuate all the residual liquid in the entire system pipeline.

[0048] Finally, perform thermal disinfection. Monitor the pressure in the system pipeline. When the pressure reaches the preset value, the steam fills the entire pipeline. At this time, turn off the thermal disinfection heater 3. After reaching the disinfection duration, open the push liquid discharge valve 6 to discharge the steam, and complete the entire thermal disinfection process.

[0049] The thermal disinfection heater 3 of the present invention adopts a structure with a heating component configured outside the pipe. During normal operation, it can be used as a pipeline, and during disinfection, it is used as a heater.

[0050] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis, comprising a stirring tank (1) and a liquid storage tank (2). The stirring tank (1) is provided with a liquid preparation assembly. The liquid outlet of the stirring tank (1) is communicated with the liquid storage tank (2) through a pipeline. It is characterized in that: The liquid storage tank (2) is a buffer tank; the automatic steam disinfection system for centralized preparation and supply of liquid also includes a thermal disinfection heater (3). The liquid inlet of the thermal disinfection heater (3) is communicated with the liquid discharge port of the liquid storage tank (2) through a pipeline. The steam outlet of the thermal disinfection heater (3) is communicated with the middle part of the liquid storage tank (2) through a pipeline; control valves are arranged at both the liquid inlet and the steam outlet of the thermal disinfection heater (3); a conductivity sensor (12) is arranged on the connecting pipeline between the stirring tank (1) and the liquid storage tank (2); the automatic steam disinfection system for centralized preparation and supply of liquid also includes a pressure sensor, and the pressure sensor is arranged in the system pipeline; the thermal disinfection heater (3) includes a liquid passing pipeline and a heating assembly arranged outside the liquid passing pipeline; the stirring tank (1) is configured with a temperature compensation pipeline. One end of the temperature compensation pipeline is communicated with the top of the stirring tank (1), and the other end is communicated with the liquid discharge port of the stirring tank (1). A temperature compensator (10) is arranged on the temperature compensation pipeline; one end of the temperature compensation pipeline is communicated with a spray valve (13), and the other end is communicated with the top of the stirring tank (1); the spray valve (13) is communicated with a liquid delivery pump (11) and the temperature compensator (10); a temperature sensor is arranged in the stirring tank (1).

2. The automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis according to claim 1, It is characterized in that: The automatic steam disinfection system for centralized preparation and supply of liquid also includes a push liquid discharge valve (6) for discharging steam, and the push liquid discharge valve (6) is arranged on the system pipeline.

3. The automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis according to claim 1, It is characterized in that: A liquid storage discharge valve (5) is arranged at the liquid discharge port of the liquid storage tank (2). The liquid storage discharge valve (5) is a three-way valve, and two ends of which are respectively communicated with the liquid discharge port of the liquid storage tank (2) and the liquid inlet of the thermal disinfection heater (3), and the third end is the liquid discharge port.

4. The automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis according to claim 1, It is characterized in that: The liquid storage tank (2) is also configured with a filtration circulation pipeline. One end of the filtration circulation pipeline is communicated with the liquid discharge port of the liquid storage tank (2), and the other end is communicated with the liquid inlet end of the liquid storage tank (2); a first filter element is arranged on the filtration circulation pipeline for filtering the liquid in the liquid storage tank (2).

5. The automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis according to claim 4, It is characterized in that: A circulation valve (7) is arranged at the steam outlet of the thermal disinfection heater (3). The circulation valve (7) is a three-way valve, and the three ends are respectively communicated with the filtration circulation pipeline, the steam outlet of the thermal disinfection heater (3) and the middle part of the liquid storage tank (2).

6. An automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis according to claim 5, characterized in that: the automatic steam disinfection system for centralized preparation and supply of concentrated solution further comprises a controller, the pressure sensor, the liquid storage discharge valve (5) and the circulation valve (7) are all electrically connected to the controller, and the controller is used to control the opening and closing and the opening state of the liquid storage discharge valve (5) and the circulation valve (7).

7. An automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis according to claim 2, characterized in that: the automatic steam disinfection system for centralized preparation and supply of concentrated solution further comprises a controller, the liquid pushing discharge valve (6) is electrically connected to the controller, and the controller is used to control the opening and closing and the opening state of the liquid pushing discharge valve (6).

8. An automatic steam disinfection system for centralized preparation and supply of concentrated solution for hemodialysis according to any one of claims 1 to 7, characterized in that: the automatic steam disinfection system for centralized preparation and supply of concentrated solution further comprises a second filter element (9), and the second filter element (9) is arranged on the connecting pipeline between the stirring tank (1) and the liquid storage tank (2).

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