Dialysis powder liquid preparation device for hemodialysis

Abstract

The utility model discloses a dialysis powder liquid preparation device for hemodialysis, and belongs to the field of medical equipment. According to the utility model, a multi-hopper appointment blanking mode is adopted, integer bags of dialysis powder are arranged in each hopper, opening and closing of each hopper are automatically realized according to set time, and a worker does not need to arrive at the site to prepare liquid in advance; under the liquid preparation barrel and the liquid storage barrel with the same volume, more concentrated solutions can be prepared for multiple times; and through the liquid level switch in the liquid storage barrel, the function of automatically preparing and transferring liquid in lack of liquid can be realized. According to the utility model, a water circulation stirring mode is adopted, and the turbulent flow cap is additionally arranged at the bottom of the liquid preparation barrel, so that the generation of hollow vortexes is effectively prevented while the high stirring speed of strong vortexes is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of medical equipment, specifically, it relates to a dialysis powder preparation device for hemodialysis. Background Technology

[0002] With the number of dialysis patients increasing year by year and the demands for dialysis costs rising, using dialysis powder to prepare solutions on-site instead of dialysis concentrate has become a good solution.

[0003] Based on the existing feeding structure of liquid preparation devices, current liquid preparation devices can be roughly divided into the following types:

[0004] For example, the structure shown in Chinese patent application number 2023101940719 is characterized by the absence of a hopper, making it impossible to add materials in advance. Staff need to arrive at work one to two hours early to start preparing the solution.

[0005] For example, the structure shown in Chinese Patent Application No. 2023109281832 is characterized by a hopper. The pre-mixed powder is placed into the hopper and then continuously fed in a quantitative manner according to the needs. However, since the dialysis powder itself is a pre-mixed powder, it can only ensure that the content of various substances in the whole package meets the standard. The powder is not completely uniformly distributed, and it cannot guarantee that the content of substances after each batch of solution preparation meets the standard. Therefore, this solution preparation device cannot perform batch solution preparation.

[0006] Currently, the existing stirring mechanisms in liquid preparation devices mainly include two types: paddle stirring and electromagnetic stirring. Paddle stirring is more common, but it is easy to mix in a large amount of air during the stirring process, and the paddles are also prone to corrosion. Electromagnetic stirring, on the other hand, requires a high conductivity of the liquid. The water used to prepare the dialysis solution is pure water with a conductivity of 0, and the conductivity of the prepared B concentrate is only about 5 S / m. The optimal conductivity for electromagnetic stirrers is still very different. At the same time, the cost of electromagnetic stirring structures is high, making them unsuitable for actual large-scale structure production.

[0007] There is no corresponding adaptation in the existing technology for preparing large quantities of dialysis powder solution. During peak periods of dialysis patients, there is a situation where it is impossible to prepare the corresponding amount of dialysis solution in time.

[0008] Therefore, a new solution is needed to address the above problems. Utility Model Content

[0009] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a dialysis powder preparation device for hemodialysis.

[0010] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0011] A dialysis powder preparation device for hemodialysis includes a preparation tank and a storage tank. Multiple hoppers are positioned above the preparation tank, and the hoppers are connected to the preparation tank via pipes. A hopper valve is installed on the pipe between the hopper and the preparation tank. A preparation nozzle is installed inside the preparation tank. A baffle cap and a level switch are installed at the bottom of the preparation tank. A water outlet pipe is located at the bottom of the preparation tank and is connected to an inlet pipe. The preparation nozzle is connected to the inlet pipe via a circulation pipe. A main inlet valve and a flow meter are installed on the inlet pipe. Together with the outlet pipe, inlet pipe, circulation pipe, and dispensing nozzle, it forms a circulation pipeline. The outlet pipe is equipped with a dispensing tank outlet valve, the circulation pipe is equipped with a dispensing circulation valve, the inlet pipe located between the outlet pipe and the circulation pipe is equipped with a dispensing circulation pump, the inlet pipe is also connected to the storage tank through a connecting pipe, the connecting pipe is equipped with a storage tank inlet and outlet valve, the inlet pipe located between the circulation pipe and the connecting pipe is equipped with a transfer valve, the storage tank is equipped with a storage tank level switch, and the end of the inlet pipe away from the main inlet valve is equipped with a connecting valve.

[0012] Furthermore, a sprayer is installed on the top of the inner side of the mixing tank, and a sprayer is installed on the top of the storage tank. It also includes a disinfectant supply pipe with a self-priming pump. The disinfectant supply pipe is connected to the inlet pipe, the sprayer of the mixing tank, and the sprayer of the storage tank through pipes. A disinfection valve, a sprayer valve of the mixing tank, and a sprayer valve of the storage tank are respectively installed between the disinfectant supply pipe and the inlet pipe, the sprayer of the mixing tank, and the sprayer of the storage tank. A waste liquid discharge pipe is installed on the inlet pipe at the positions corresponding to the mixing tank and the storage tank. A waste liquid discharge valve of the mixing tank and a waste liquid discharge valve of the storage tank are respectively installed on the two waste liquid discharge pipes.

[0013] Furthermore, four hoppers are provided, and each hopper is equipped with a hopper switch valve between itself and the liquid preparation tank.

[0014] Furthermore, a residual chlorine detector is installed at the end of the water inlet pipe away from the main water inlet valve.

[0015] Furthermore, a four-pole conductivity meter is installed on both sides of the liquid distribution circulation pump.

[0016] Furthermore, the turbulence cap includes a threaded connecting pipe, which is threadedly connected to the bottom of the inner side of the liquid mixing tank and is connected to the water outlet pipe. The top of the threaded connecting pipe is fixedly connected to the turbulence cap base by a connecting rod, and multiple turbulence cap fins are provided on the turbulence cap base.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention adopts a multi-hopper pre-set feeding method, with each hopper containing an integer number of bags of dialysis powder. The opening and closing of each hopper is automatically realized according to the set time, without the need for staff to arrive in advance to prepare the solution. With the same volume of solution preparation tank and storage tank, more doses of concentrate can be prepared in multiple batches. Through the liquid level switch in the storage tank, the automatic solution preparation and transfer function can be realized when the liquid is insufficient.

[0019] This invention employs a water circulation stirring method and adds a turbulence cap at the bottom of the liquid preparation tank to effectively prevent the formation of hollow vortices while ensuring strong vortex and high stirring speed.

[0020] This invention uses a four-electrode conductivity meter to completely eliminate polarization error, has strong anti-contamination ability, and has ultra-high precision, which greatly improves the accuracy of liquid preparation and reduces the maintenance rate of conductivity sensors. After cleaning, a residual chlorine detector is added for real-time residual chlorine detection, so as to achieve thorough rinsing with minimal water. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a first-view schematic diagram of the three-dimensional structure of the spoiler cap in this utility model;

[0023] Figure 3 This is a second-view schematic diagram of the three-dimensional structure of the spoiler cap in this utility model.

[0024] In the diagram: 1. Flow meter; 2. Main inlet valve; 3. Dispensing tank outlet valve; 4. Dispensing circulation pump; 5. Dispensing circulation valve; 6. Dispensing tank; 7. Baffle cap; 8. Dispensing tank sprayer; 9. Dispensing tank spray valve; 10. Dispensing tank waste discharge valve; 11. Dispensing tank level switch; 12. Dispensing nozzle; 13. Hopper switch valve one; 14. Hopper switch valve two; 15. Hopper switch valve three; 16. Hopper switch valve four; 17. Hopper one; 18. Hopper. 2; 19. Hopper 3; 20. Hopper 4; 21. Storage tank spray valve; 22. Storage tank sprayer; 23. Storage tank; 24. Transfer valve; 25. Storage tank inlet / outlet valve; 26. Storage tank level switch; 27. Storage tank waste discharge valve; 28. Residual chlorine detector; 29. ​​Connecting valve; 30. Self-priming pump; 31. Four-pole conductivity meter; 32. Disinfection valve; 701. Threaded connecting pipe; 702. Baffle cap base; 703. Baffle cap fins. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments.

[0026] like Figure 1As shown, a dialysis powder preparation device for hemodialysis includes a preparation tank 6 and a storage tank 23. Multiple hoppers are positioned above the preparation tank 6, and the hoppers are connected to the preparation tank 6 via pipes. A hopper switch valve is installed on the pipe between the hoppers and the preparation tank 6. A preparation tank sprayer 8 is installed at the top inner side of the preparation tank 6. Preparation nozzles 12 are installed inside the preparation tank 6. A baffle cap 7 and a preparation tank level switch 11 are installed at the bottom inner side of the preparation tank 6. A water outlet pipe is installed at the bottom of the preparation tank 6, and the water outlet pipe is connected to an inlet pipe. The preparation nozzles 12 are connected to the inlet pipe via a circulation pipe. A main inlet valve 2 is installed on the inlet pipe, and the main inlet valve 2 is located away from the preparation tank. A flow meter 1 is installed on one side of the liquid preparation tank 6. The liquid preparation tank 6, together with the outlet pipe, inlet pipe, circulation pipe and liquid preparation nozzle 12, form a circulation pipeline. The circulation pipeline is equipped with a liquid preparation circulation pump 4, a liquid preparation circulation valve 5 and a liquid preparation tank outlet valve 3. The liquid preparation tank outlet valve 3 is installed on the outlet pipe, the liquid preparation circulation valve 5 is installed on the circulation pipeline, and the liquid preparation circulation pump 4 is installed on the inlet pipe located between the outlet pipe and the circulation pipeline. The inlet pipe is also connected to the liquid storage tank 23 through a connecting pipe. The connecting pipe is equipped with a liquid storage tank inlet / outlet valve 25. The inlet pipe located between the circulation pipeline and the connecting pipe is equipped with a transfer valve 24. Four-pole conductivity meters 31 are installed on both sides of the liquid preparation circulation pump 4.

[0027] like Figures 1 to 3 As shown, the turbulence cap 7 includes a threaded connecting pipe 701, which is threadedly connected to the bottom of the inner side of the liquid mixing tank 6, and is connected to the water outlet pipe. The top of the threaded connecting pipe 701 is fixedly connected to the turbulence cap base 702 by a connecting rod, and multiple turbulence cap fins 703 are provided on the turbulence cap base 702.

[0028] The liquid storage tank 23 is equipped with a liquid level switch 26 inside, and a liquid storage tank sprayer 22 is installed on the top of the liquid storage tank 23.

[0029] It also includes a disinfectant supply pipe, which is equipped with a self-priming pump 30. The disinfectant supply pipe is connected to the water inlet pipe, the liquid preparation tank sprayer 8, and the liquid storage tank sprayer 22 through pipes. A disinfection valve 32, a liquid preparation tank sprayer 9, and a liquid storage tank sprayer 21 are respectively installed between the disinfectant supply pipe and the water inlet pipe, the liquid preparation tank sprayer 8, and the liquid storage tank sprayer 22. A waste liquid discharge pipe is installed on the water inlet pipe at the positions corresponding to the liquid preparation tank 6 and the liquid storage tank 23. The two waste liquid discharge pipes are respectively equipped with a liquid preparation tank waste discharge valve 10 and a liquid storage tank waste discharge valve 27. A residual chlorine detector 28 and a connecting valve 29 are installed at the end of the water inlet pipe.

[0030] There are four hoppers: hopper 17, hopper 28, hopper 39, and hopper 40. Each hopper is used to load an integer number of bags of dialysis powder. Each hopper is equipped with a corresponding hopper switch valve between itself and the liquid preparation tank 6: hopper switch valve 13, hopper switch valve 24, hopper switch valve 35, and hopper switch valve 46. The hopper switch valves of multiple hoppers and the aforementioned pipeline valves are all uniformly controlled by an external controller. The connection to the external controller includes, but is not limited to, line connection and signal connection.

[0031] Solution preparation process: Initially, all valves are closed. Solution preparation begins via an external controller. The main inlet valve 2 and the solution circulation valve 5 are opened, and RO water is pumped from the outside to the solution tank 6 through the inlet pipeline. The flow meter 1 monitors the total amount of RO water entering the circulation pipeline. The RO water passes through the flow meter 1 and enters the solution tank 6 through the tangentially arranged solution nozzles 12. After reaching the specified flow rate, the solution circulation pump 4 and the solution tank outlet valve 3 are opened. At the same time, the hopper switch valve 13 is opened, and the whole number of dialysis powder bags enter the solution tank 6 from the hopper 17 until the RO water is added to the required solution preparation volume. Then, the main inlet valve 2 is closed.

[0032] The powder-water mixture in the mixing tank 6 is stirred in the circulation pipeline through the mixing tank outlet valve 3, the mixing circulation pump 4, the mixing circulation valve 5, and the mixing nozzle 12, forming a strong vortex. At the same time, the turbulence cap 7 set at the bottom of the inner side of the mixing tank 6 can effectively prevent the generation of hollow vortices. The conductivity value is monitored in real time by the four-pole conductivity meter 31. After the conductivity stabilizes and reaches the set value, the dialysis powder and RO water are stirred evenly. At this time, the mixing circulation valve 5 can be closed, and the transfer valve 24 and the storage tank inlet / outlet valve 25 can be opened. The mixed solution enters the storage tank 23 through the storage tank inlet / outlet valve 25.

[0033] When the liquid level in the mixing tank 6 is lower than the set liquid level, the liquid level switch 11 of the mixing tank sends a signal, and the mixing circulation pump 4 and the transfer valve 24 are closed, stopping the water circulation and mixing of the liquid.

[0034] When the solution preparation device is connected to an external dialysis device or mixing device, open the connecting valve 29 to allow the solution to enter the subsequent device.

[0035] When the liquid level in the storage tank 23 is lower than the set liquid level, the liquid level switch 26 of the storage tank is activated and issues a command to restart the liquid preparation program and repeat the above process. Each time liquid is prepared, only the dialysis powder in one of the hoppers 17, 18, 19 and 20 is added. The powder can be added to the liquid preparation tank 6 in the order of hopper 17, 18, 19 and 20.

[0036] Staff can place the corresponding number of dialysis powder bags into the four hoppers according to the dialysis time and the number of patients. The dialysis powder can be prepared in advance in batches. After the dialysis powder in one hopper is prepared, the solution can be stored in the storage tank 23. When the liquid level in the storage tank 23 is lower than the set level, the solution can be prepared again. This can solve the problem of insufficient solution preparation for dialysis machines in hospitals due to a shortage of solution preparation machines and a large number of patients. During the peak period of dialysis patients, the corresponding amount of dialysis solution can be prepared in a timely manner.

[0037] Once all the ingredients are prepared, close all valves and then start disinfection via an external controller. The disinfection process consists of three steps: disinfection with disinfectant solution, RO water rinsing, and online detection of residual chlorine.

[0038] The disinfection process is as follows: Open the main inlet valve 2, disinfection valve 32, self-priming pump 30, liquid preparation tank spray valve 9, liquid storage tank spray valve 21, liquid preparation circulation valve 5, liquid preparation tank outlet valve 3, liquid storage tank inlet / outlet valve 25, liquid preparation tank waste discharge valve 10, and liquid storage tank waste discharge valve 27. After the RO water passes through the flow meter 1, it is mixed with the disinfectant and sprayed onto the body of the liquid preparation tank sprayer 8 and liquid storage tank sprayer 22. The water is then discharged through the liquid preparation tank outlet valve 3, liquid preparation tank waste discharge valve 10, liquid storage tank inlet / outlet valve 25, and liquid storage tank waste discharge valve 27.

[0039] The RO water rinsing process is as follows: Turn off the self-priming pump 30, and open the main inlet valve 2, disinfection valve 32, liquid preparation tank spray valve 9, liquid storage tank spray valve 21, liquid preparation circulation valve 5, liquid preparation tank outlet valve 3, liquid storage tank inlet / outlet valve 25, liquid preparation tank waste discharge valve 10, and liquid storage tank waste discharge valve 27. After passing through the flow meter 1, the RO water is sprayed onto the liquid preparation tank body by the rotating sprayers 8 and 22, and then discharged through the liquid preparation tank outlet valve 3, liquid preparation tank waste discharge valve 10, liquid storage tank inlet / outlet valve 25, and liquid storage tank waste discharge valve 27.

[0040] The online residual chlorine detection process is as follows: After the RO water rinsing process is completed, the residual chlorine detector 28 value is read. If the value is within the threshold, disinfection is stopped. If it exceeds the threshold, rinsing is repeated until the value is qualified.

Claims

1. A dialysis powder preparation device for hemodialysis, characterized in that, The system includes a mixing tank and a storage tank. Multiple hoppers are mounted on top of the mixing tank, and these hoppers are connected to the mixing tank via pipes. A hopper control valve is installed on each pipe connecting the hoppers to the mixing tank. A mixing nozzle is installed inside the mixing tank. A baffle cap and a level switch are installed at the bottom of the mixing tank's inner side. A water outlet pipe is located at the bottom of the mixing tank and connects to an inlet pipe. The mixing nozzle is also connected to the inlet pipe via a circulation pipe. A main inlet valve and a flow meter are installed on the inlet pipe. The mixing tank is connected to the water outlet pipe and the inlet pipe. The circulation pipeline consists of a circulation pipe and a dispensing nozzle. The outlet pipe is equipped with a dispensing tank outlet valve, and the circulation pipe is equipped with a dispensing circulation valve. The inlet pipe located between the outlet pipe and the circulation pipe is equipped with a dispensing circulation pump. The inlet pipe is also connected to the storage tank through a connecting pipe, which is equipped with a storage tank inlet / outlet valve. The inlet pipe located between the circulation pipe and the connecting pipe is equipped with a transfer valve. The storage tank is equipped with a storage tank level switch, and a connecting valve is installed at the end of the inlet pipe away from the main inlet valve.

2. The dialysis powder preparation device for hemodialysis according to claim 1, characterized in that, The top of the inner side of the mixing tank is equipped with a mixing tank sprayer, and the top of the storage tank is equipped with a storage tank sprayer. It also includes a disinfectant supply pipe with a self-priming pump. The disinfectant supply pipe is connected to the water inlet pipe, the mixing tank sprayer, and the storage tank sprayer through pipes. Disinfection valves, mixing tank spray valves, and storage tank spray valves are respectively installed between the disinfectant supply pipe and the water inlet pipe, the mixing tank sprayer, and the storage tank sprayer. Waste liquid discharge pipes are installed on the water inlet pipe at the positions corresponding to the mixing tank and the storage tank. The two waste liquid discharge pipes are equipped with a mixing tank waste discharge valve and a storage tank waste discharge valve, respectively.

3. The dialysis powder preparation device for hemodialysis according to claim 1, characterized in that, The aforementioned hoppers are provided in four parts, and each hopper is equipped with a hopper switch valve between itself and the liquid preparation tank.

4. A dialysis powder preparation device for hemodialysis according to claim 2, characterized in that, A residual chlorine detector is installed at the end of the water inlet pipe away from the main water inlet valve.

5. A dialysis powder preparation device for hemodialysis according to claim 1, characterized in that, The liquid distribution circulation pump is equipped with four-pole conductivity meters on both sides.

6. A dialysis powder preparation device for hemodialysis according to claim 1, characterized in that, The turbulence cap includes a threaded connecting pipe, which is threaded to the bottom of the inside of the liquid mixing tank and is connected to the outlet pipe. The top of the threaded connecting pipe is fixedly connected to the turbulence cap base by a connecting rod, and multiple turbulence cap fins are provided on the turbulence cap base.

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