CN112121187A - Concentrated solution centralized preparation and supply automatic steam disinfection system for hemodialysis - Google Patents

Abstract

The invention relates to an automatic steam disinfection system for concentrated solution centralized preparation and supply for hemodialysis, which comprises a stirring tank and a liquid storage tank, wherein the stirring tank is provided with a solution preparation assembly, a liquid outlet of the stirring tank is communicated with the liquid storage tank through a pipeline, and the liquid storage tank is a cache tank; the centralized distribution liquid supply automatic steam disinfection system also comprises a heat disinfection heater, a liquid inlet of the heat disinfection heater is communicated with a liquid outlet of the liquid storage tank through a pipeline, and a steam outlet of the heat disinfection heater is communicated with the middle part of the liquid storage tank through a pipeline; the liquid inlet and the steam outlet of the heat disinfection heater are both provided with control valves. The invention can realize sufficient and thorough heat sterilization of the liquid supply system and is convenient and fast to operate.

Description

An automatic steam disinfection system for centralized dispensing and supply of concentrated liquid for hemodialysis

technical field

The invention relates to the technical field of medical equipment, in particular to an automatic steam disinfection system for concentrated liquid distribution and supply for hemodialysis.

Background technique

Due to the continuous development of the dialysis industry and the expansion of the scale of hemodialysis, a dialysis center now receives 100 dialysis patients at a time. The traditional method is to manually transport the dialysate. One device requires two barrels of dialysis concentrate, A/B, and uses The dialysate also needs to be replaced during the process, which not only cannot control the quality of the original solution, but also increases the risk of contamination. With the development of technology and the continuous improvement of people's living standards, dialysis patients have higher requirements for dialysis quality. In recent years, manufacturers have been exploring centralized liquid supply systems, but most of them are not perfect. Because the centralized liquid supply is still in its infancy, the industry technology is uneven, and there are no relevant international standards, so there are many problems.

First of all, the existing centralized liquid supply system is prone to seepage and leakage, the liquid dispensing is not accurate enough, the dispensing accuracy is unstable, and the dispensed liquid is easy to be out of balance. Secondly, the delivery pressure is difficult to control, and it is difficult to achieve a balanced fluid supply when there are many large beds in the dialysis center. Finally, the equipment liquid supply pipeline is easy to be polluted, especially the complicated disinfection process is difficult to clean, and there are residues. Even if it is emptied, compressed air needs to be used, and it is difficult to ensure that the compressed air must be clean. Although the systems of many manufacturers have automatic disinfection functions, the disinfection effect is extremely poor, and the duration is not sufficient. It is difficult to clean the ultra-long pipelines, and there is a risk of residual disinfectant. With thermal sterilization, because the pipeline is too long, the loss of water temperature to the end temperature is large, the end cannot reach the sterilization temperature, and the thermal sterilization is not thorough enough.

SUMMARY OF THE INVENTION

Aiming at at least one technical problem existing in the prior art, the present invention provides an automatic steam disinfection system for centralized dispensing and supply of concentrated liquid for hemodialysis, which can realize sufficient and thorough thermal disinfection of the liquid supply system, and is convenient to operate.

The technical solution of the present invention to solve the above technical problems is as follows: an automatic steam disinfection system for centralized dispensing and supply of concentrated liquid for hemodialysis, comprising a stirring tank and a liquid storage tank, wherein the stirring tank is provided with a liquid dispensing component, and the The liquid outlet is communicated with a liquid storage tank through a pipeline, and the liquid storage tank is a buffer tank; the automatic steam disinfection system for centralized liquid distribution and supply also includes a thermal disinfection heater, and the liquid inlet of the thermal disinfection heater passes through The pipeline is communicated with the liquid outlet of the liquid storage tank, and the steam outlet of the thermal sterilization heater is communicated with the middle of the liquid storage tank through the pipeline; both the liquid inlet and the steam outlet of the thermal sterilization heater are provided with control valves.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Further, the centralized liquid dispensing and supplying automatic steam sterilization 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.

Further, the liquid storage tank discharge port is provided with a liquid storage discharge valve, and the liquid storage discharge valve is a three-way valve, wherein the two ends are respectively connected with the liquid discharge port of the liquid storage tank and the liquid inlet of the thermal disinfection heater. , the third end is the drain port.

Preferably, the thermal sterilization heater includes a liquid-passing pipe and a heating component disposed outside the liquid-passing pipe.

Preferably, the liquid storage tank is further configured with a filter circulation pipeline, one end of the filter circulation pipeline is connected with the liquid discharge port of the liquid storage tank, and the other end is connected with the liquid inlet end of the liquid storage tank; A first filter element is arranged on the pipeline for filtering the liquid in the liquid storage tank.

Preferably, the steam outlet of the thermal sterilization heater is provided with a circulation valve, the circulation valve is a three-way valve, and the three ends are respectively connected to the filter circulation pipeline, the steam outlet of the thermal sterilization heater and the middle of the liquid storage tank.

Preferably, the centralized liquid dispensing and supplying automatic steam sterilization system further includes a pressure sensor, and the pressure sensor is arranged in the system pipeline.

Preferably, the centralized liquid dispensing and supplying automatic steam sterilization system further includes a controller, the pressure sensor, the liquid storage and discharge valve and the circulation valve are all electrically connected to the controller, and the controller is used to control the liquid storage and discharge valve and The open, closed and open status of the circulation valve.

Preferably, the centralized liquid dispensing and supplying automatic steam sterilization system further includes a controller, the liquid pushing and discharging valve is electrically connected with the controller, and the controller is used to control the opening, closing and opening states of the liquid pushing and discharging valve.

Further, the centralized liquid dispensing and supplying automatic steam sterilization 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.

The beneficial effects of the present invention are as follows: the present invention adopts an external thermal sterilization heater for steam thermal sterilization, and the system pipeline can be emptied by steam pressure without introducing new pollution sources; the present invention can sterilize the system pipeline through steam thermal disinfection The road is fully disinfected, and there will be no residual disinfection dead corners to ensure thorough disinfection.

Description of drawings

Fig. 1 is the structural representation of the present invention;

In the accompanying drawings, the list of components represented by each number is as follows:

1. Stirring tank, 2. Liquid storage tank, 3. Thermal disinfection heater, 4. Liquid supply pump, 5. Liquid storage and discharge valve, 6. Liquid pushing and discharging valve, 7. Circulation valve, 8. First filter element, 9 , The second filter element, 10, temperature compensator, 11, liquid dispensing pump, 12, conductivity sensor, 13, spray valve, 14, water inlet valve, 15, liquid dispensing and discharge valve, 16, magnetic stirrer.

Detailed ways

The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples are only used to explain the present invention, but not to limit the scope of the present invention.

As shown in Figure 1, a concentrated liquid supply automatic steam disinfection system 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 liquid dispensing, and the liquid storage tank 2 is used for To store the liquid slowly, the liquid outlet of the stirring tank 1 is communicated with the liquid storage tank 2 through a pipeline.

The automatic steam sterilization system for concentrated liquid distribution and supply for hemodialysis also includes a thermal sterilization heater 3, and the liquid inlet of the thermal sterilization heater 3 is communicated with the liquid outlet of the liquid storage tank 2 through a pipeline. The steam outlet of the thermal sterilization heater 3 is also communicated with the middle of the liquid storage tank 2 through a pipeline.

The core of the automatic steam sterilization system for concentrated liquid distribution and supply for hemodialysis of the present invention lies in the pipeline control part, which is composed of a controller and several valves, and the whole system is a fully sealed system.

The liquid outlet of the stirring tank 1 is provided with a liquid distribution and discharge valve 15, and the liquid distribution and discharge valve 15 is a three-way valve with a connection port and a liquid discharge port. One end of the connecting pipeline of the stirring tank 1 and the liquid storage tank 2 is connected with the connection port of the liquid dispensing and discharge valve 15 , and the other end is connected with the liquid inlet end of the liquid storage tank 2 . A water inlet valve 14 and a liquid dosing pump 11 are also arranged in sequence on the connecting pipeline between the stirring tank 1 and the liquid storage tank 2 . The water inlet valve 14 is also a three-way valve, which is arranged between the liquid dosing pump 11 and the liquid dosing and discharge valve 15, and is provided with a water inlet.

The liquid discharge port of the liquid storage tank 2 is provided with a liquid storage discharge valve 5. The liquid storage discharge valve 5 is also a three-way valve and is provided with a connection port and a liquid discharge port. The liquid inlet of the thermal disinfection heater 3 is communicated with the connection port of the liquid storage and discharge valve 5 through a pipeline.

The above valves are all electronically controlled valves, which are electrically connected to the controller. The controller can be a programmable controller, specifically, the 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 edited according to the working principle of the present invention to control the opening and closing and/or opening and closing modes of each valve.

The centralized liquid supply system of the prior art is difficult to clean when chemical sterilization is used, and the disinfectant is likely to remain; and when thermal sterilization is used, it is difficult to cover the entire pipeline. After research, the inventors found that the main reason for the above problem is that it is difficult to achieve system emptying. Although some manufacturers are equipped with compressed air devices and use compressed air to achieve system evacuation, the inventor found after research that it is difficult to ensure the cleanliness of compressed air, which will introduce new pollution. Compressed air pollution is the core reason that makes it difficult for the existing system to achieve complete disinfection. This technical problem has not been disclosed.

The present invention adopts the external thermal disinfection heater 3 to effectively solve the technical problem of both emptying and pollution. In the present invention, the external thermal disinfection heater 3 is equivalent to a set of heated circulation pipelines arranged on the side of the liquid storage tank 2. When in use, the disinfection steam generated by the thermal disinfection heater 3 can be used to increase the pressure of the entire system pipeline, and the use of The pressure generated by the steam pushes out the liquid remaining in the liquid storage tank 2 and the pipeline for discharge to realize emptying. The whole process does not introduce new pollution sources, which not only realizes emptying, but also takes into account the pollution problem.

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

Preferably, a circulation valve 7 can be configured at the steam outlet end of the thermal sterilization heater 3. The circulation valve 7 also adopts a three-way valve, one end is connected with the steam outlet of the thermal sterilization heater 3, and the other end is connected with the filter circulation pipeline. The liquid inlet end is communicated, and the third end communicates with the middle of the liquid storage tank 2 .

Preferably, a liquid pushing and discharging valve 6 may be provided on the filtration circulation pipeline for discharging sterilizing steam after sterilization.

In the present invention, in order to solve the problem of balanced liquid supply, a liquid supply pump 4 is arranged at the liquid discharge port of the liquid storage tank 2 . The liquid supply pump 4 is preferably a variable frequency pump, which can be connected to the connection pipeline between the thermal disinfection heater 3 and the liquid storage discharge valve 5 . In this way, it is possible to provide power for both filtration and liquid supply.

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

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

In order to solve the problem of precise liquid dosing in the present invention, a conductivity sensor 12 is set on the connecting pipeline between the stirring tank 1 and the liquid storage tank 2, which is electrically connected to the controller, and is used to monitor the conductivity of the liquid dosing in real time, thereby judging whether the liquid dosing is not. Precise. If the conductivity is abnormal, the controller will control the relevant valve to cut off the connecting pipeline between the mixing tank 1 and the liquid storage tank 2, and then open it after adjusting the liquid distribution.

In order to ensure safety, a second filter element 9 may also be provided on the connecting pipeline between the stirring tank 1 and the liquid storage tank 2 for filtering the matched liquid.

In order to improve the liquid dosing efficiency, a magnetic stirrer 16 may also be arranged in the stirring tank 1 . The inventor found through research that the use of water flow stirring combined with magnetic stirring can increase the liquid dosing efficiency by more than 50%, and greatly save the liquid dosing time.

In order to ensure that the configured liquid has a relatively suitable temperature during dialysis, the stirring tank 1 is also equipped with a temperature compensation pipeline. The liquid ports are connected, and a temperature compensator 10 is arranged on the temperature compensation pipeline. A temperature sensor is arranged in the stirring tank 1 to monitor the liquid temperature.

Preferably, a spray valve 13 can be configured where the connecting pipeline between the stirring tank 1 and the liquid storage tank 2 is located between the liquid distribution pump 11 and the second filter element 9, and a three-way valve can be used. 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 stirring tank 1 . The spray valve 13 is connected to the liquid dosing pump 11 , the second filter element 9 and the temperature compensator 10 respectively.

The working principle of the present invention is as follows:

When the system is running normally:

First, do the liquid dispensing, inject the A/B liquid into the mixing tank 1 from the water inlet valve 14 according to the optimal proportion, the spray valve 13 is closed, the liquid dispensing pump 11 is turned on, and the pressure of the liquid inlet is used to form a rotary motion in the mixing tank 1. flow to achieve water flow agitation. At the same time, the magnetic stirrer 16 is also turned on, and magnetic stirring is performed at the same time. During this process, the liquid discharge port of the dosing and discharging valve 15 is closed. When dispensing liquid, the temperature sensor in the stirring tank 1 monitors the temperature in real time. If the temperature is not suitable, open the spray valve 13 after the liquid dispensing is completed to connect the two ends of the temperature compensator 10 and the liquid dispensing pump 11, and use the liquid dispensing pump 11. The liquid is pumped and circulated, and the liquid temperature is adjusted to a suitable state.

Then buffer the liquid, close the end of the spray valve 13 connected to the temperature compensator 10, open the connecting pipeline between the stirring tank 1 and the liquid storage tank 2, and use the liquid dispensing pump 11 to pump the prepared liquid to the liquid storage tank 2 for buffering . During this process, the conductivity sensor 12 monitors the conductivity of the liquid in real time, and if the conductivity is abnormal, the spray valve 13 is closed, and the liquid dispensing operation is performed again. When the liquid prepared in the stirring tank 1 is pumped to the liquid storage tank 2 , the liquid will be filtered through the second filter element 9 .

Finally, infusion is carried out, the liquid storage and discharge valve 5 is opened, and the liquid is transported to the dialysis terminal by means of self-flow liquid supply. During this process, the liquid level sensor in the liquid storage tank 2 monitors the liquid level in real time, and if the liquid level is lower than the limit value, the liquid supply pump 4 is turned on to pressurize the liquid supply.

When system disinfection is required:

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

Next, emptying is carried out, the circulation valve 7 is opened, and the steam is transported into the liquid storage tank 2, and then the liquid discharge port of the liquid storage discharge valve 5 and the liquid discharge port of the liquid distribution discharge valve 15 are opened, and the liquid storage tank 2 is discharged by the steam pressure. And the liquid in the stirring tank 1 is emptied, and the residual liquid in the whole system pipeline is completely emptied at the same time.

Finally, heat disinfection is performed, and the pressure in the system pipeline is monitored. When the pressure reaches the preset value, the whole pipeline is filled with steam. At this time, the thermal disinfection heater 3 is turned off. After the disinfection time is reached, the push liquid discharge valve 6 is opened to discharge the steam. , to complete the entire thermal sterilization process.

The thermal disinfection heater 3 of the present invention adopts a structure in which a heating component is arranged outside the tube, and can be used as a pipeline during normal operation and as a heater during disinfection.

The above are only 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 in the protection of the present invention. within the range.

Claims (10)

1. a concentrated liquid supply automatic steam disinfection system for hemodialysis, comprising a stirring tank (1) and a liquid storage tank (2), the stirring tank (1) is provided with a liquid dispensing assembly, and the stirring tank (1) The liquid outlet of 1) is communicated with the liquid storage tank (2) through a pipeline, and is characterized in that: the liquid storage tank (2) is a buffer tank; the centralized liquid supply automatic steam disinfection system also includes a thermal disinfection heating system The liquid inlet of the thermal sterilization heater (3) is communicated with the liquid outlet of the liquid storage tank (2) through a pipeline, and the steam outlet of the thermal sterilization heater (3) is connected to the storage tank through a pipeline. The middle of the liquid tank (2) is communicated; the liquid inlet and the steam outlet of the thermal sterilization heater (3) are both provided with control valves. 2. a kind of concentrated liquid supply automatic steam disinfection system for hemodialysis according to claim 1, it is characterized in that: described centralized distribution liquid supply automatic steam disinfection system also comprises the push liquid discharge valve that discharges steam ( 6), the push liquid discharge valve (6) is arranged on the system pipeline. 3. The automatic steam sterilization system for concentrated liquid distribution and supply for hemodialysis according to claim 1, characterized in that: the liquid storage tank (2) discharge port is provided with a liquid storage discharge valve (5), The liquid storage and discharge valve (5) is a three-way valve, two ends of which are respectively connected 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 a liquid discharge port . 4. The automatic steam sterilization system for centralized distribution and supply of concentrated liquid for hemodialysis according to claim 3, characterized in that: the thermal disinfection heater (3) comprises a liquid-passing pipeline and a heating element. 5. The automatic steam sterilization system for concentrated liquid distribution and supply for hemodialysis according to claim 4, characterized in that: the liquid storage tank (2) is also configured with a filtration circulation pipeline, and the filtration circulation pipe One end of the road 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); The liquid in the liquid tank (2) is filtered. 6. The automatic steam sterilization system for concentrated liquid distribution and supply for hemodialysis according to claim 5, characterized in that: the steam outlet of the thermal sterilization heater (3) is provided with a circulation valve (7), so The circulation valve (7) is a three-way valve, and the three ends are respectively connected to the filter circulation pipeline, the steam outlet of the thermal sterilization heater (3) and the middle of the liquid storage tank (2). 7. The automatic steam sterilization system for concentrated liquid distribution and supply for hemodialysis according to claim 6, characterized in that: the centralized liquid distribution and supply automatic steam sterilization system further comprises a pressure sensor, and the pressure sensor is provided with in the system piping. 8. The automatic steam sterilization system for concentrated liquid distribution and supply for hemodialysis according to claim 7, characterized in that: the centralized liquid distribution and supply automatic steam sterilization system further comprises a controller, the pressure sensor, Both the liquid storage and discharge valve (5) and the circulation valve (7) are electrically connected with the controller, and the controller is used to control the opening, closing and opening states of the liquid storage and discharge valve (5) and the circulation valve (7). 9 . The automatic steam sterilization system for concentrated liquid distribution and supply for hemodialysis according to claim 2 , wherein the automatic steam sterilization system for centralized liquid distribution and supply further comprises a controller, and the push liquid discharges The valve (6) is electrically connected with the controller, and the controller is used to control the opening, closing and opening states of the liquid pushing and discharging valve (6). 10. The automatic steam sterilization system for concentrated liquid distribution and supply for hemodialysis according to any one of claims 1 to 9, wherein the automatic steam disinfection system for centralized liquid distribution and supply further comprises a second filter element (9), 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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