An apparatus for sterilization of a hemodialyzer reprocessing machine

Abstract

The utility model discloses a kind of equipment for hemodialysis equipment reinspection machine sterilization, it mainly includes heating, water inlet, water outlet and four components of backwater, can realize to multiple reinspection machines simultaneously supply sterilization hot water and recycle;Heating component takes water storage kettle as core, built-in heating element heats sterilization water, and water temperature is monitored in real time by heating resistance, water inlet component supplies water to water storage kettle by water inlet pipe, water outlet component is connected centrifugal pump by total water outlet pipe, and branch pipe is divided to multiple, each branch pipe is equipped with pressure sensor and precision filter, finally access the water inlet of each reinspection machine, backwater component is then connected by total backwater pipe and each branch pipe with pressure gauge, back pressure valve and heating resistance, the liquid of reinspection machine water outlet is backflowed to water storage kettle;The utility model discloses that the structure of sterilization equipment is integrated high, support multiple machine parallel sterilization and recycling, by real-time monitoring and valve control, ensure that sterilization process is stable and reliable and efficient.

Description

Technical Field

[0001] This utility model relates to the technical field of re-inspection and sterilization equipment, specifically to a device for sterilizing a re-inspection machine for hemodialysis machines. Background Technology

[0002] Hemodialysis is a primary alternative treatment for patients with mid-to-late-stage renal dysfunction, and the hemodialysis machine is a key medical consumable in the hemodialysis treatment process. During the production of hemodialysis machines, after the entire product is assembled, it needs to undergo performance testing. Only after passing the test can it be put into medical use. One important test is the leak pressure monitoring of the dialyzer, i.e., retesting. Only products that pass the retest can proceed to the next process.

[0003] The re-inspection equipment for dialyzers requires sterilization with high-temperature water before and after use. In existing technology, factories typically use centralized heating systems to treat the sterilization water at high temperatures. This involves heating the water to a set temperature in a heating vessel and then transporting it to the re-inspection equipment in each workshop via a pipeline network. However, this method has significant technical bottlenecks in practical applications. When the transport distance is long, heat exchange between the pipeline and the external environment causes the water temperature to decrease along the way. This is especially pronounced in winter or when the ambient temperature is low, resulting in more severe heat loss. The actual water temperature reaching the re-inspection equipment may be lower than the sterilization process requirement, directly affecting the sterilization effect and potentially causing the dialyzer's bioburden test to fail, thus impacting production efficiency and product qualification rate.

[0004] To address this issue, existing technologies generally employ a compensation strategy of increasing the initial temperature of the centralized heating vessel, setting a higher target temperature to offset heat loss during transport. However, this method has several drawbacks. For instance, overheating significantly increases energy consumption, causing a surge in factory electricity load, especially in large-scale continuous production scenarios where energy costs rise non-linearly. Furthermore, high-temperature water exacerbates thermal stress in the pipeline system during long-distance transport, accelerating the aging of sealing materials and increasing the risk of leaks, pipe bursts, and other safety hazards. It can also lead to localized steam accumulation, increasing operational risks. Moreover, relying solely on temperature compensation makes it difficult to accurately control the terminal water temperature, leaving the risk of inadequate sterilization or excessive energy waste. Therefore, both electricity load and safety hazards will increase significantly, hindering the long-term sustainable development of enterprises. Necessary improvements and innovations to the existing thermal pipeline system are urgently needed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a device that supports multi-machine parallel sterilization and recycling, and ensures a stable, reliable, and efficient sterilization process through secondary heating and real-time monitoring of water temperature and pressure.

[0006] The specific details are as follows: A device for sterilizing a hemodialysis machine re-inspection machine, comprising: A heating assembly, comprising a water storage vessel, a heating element provided inside the water storage vessel for heating the liquid inside, and a first thermal resistor for monitoring the temperature of the liquid inside the water storage vessel; The water inlet assembly includes a water inlet pipe connected to and installed on a water storage tank at one end, and a first valve connected in series with the water inlet pipe and controlling its on / off state. The water outlet assembly includes a main water outlet pipe connected to and installed on a water storage tank, and multiple branch water outlet pipes connected in parallel to the main water outlet pipe. A centrifugal pump is connected in series on the main water outlet pipe, and a first pressure sensor and a precision filter are connected in series on each branch water outlet pipe. The other end of each branch water outlet pipe is connected to the water inlet of a re-inspection machine. The water return assembly includes a main water return pipe connected to and installed on a water storage tank, and multiple branch water return pipes connected in parallel to the main water return pipe. A second valve for controlling the on / off state is installed in series on the main water return pipe. Each branch water return pipe is equipped with a pressure gauge, a back pressure valve, and a second thermal resistor. The other end of each branch water return pipe is connected to the outlet of a re-inspection machine. A drain pipe is also connected to the main water return pipe, and a third valve for controlling the on / off state is installed in series on the drain pipe.

[0007] Preferably, the water storage vessel is equipped with a plurality of tuning fork level gauges distributed vertically for monitoring the internal liquid level.

[0008] Preferably, the top of the water storage vessel is equipped with a removable end cap, which has a breather valve and a transparent viewing window, and the bottom of the water storage vessel is also equipped with a drain pipe with a control ball valve.

[0009] Preferably, the inlet pipe and the main return pipe are both installed at the top of the water storage tank, and the main outlet pipe is installed at the bottom of the water storage tank.

[0010] Preferably, the free end of the water inlet pipe is equipped with a U-shaped connecting pipe for connecting to the workshop circulation pipeline, and a first manual diaphragm valve is also connected in series on the water inlet pipe between the connecting pipe and the first valve. The first valve is a pneumatic diaphragm valve.

[0011] Preferably, a second manual diaphragm valve, a cassette filter, and a second pressure sensor are also installed on the main outlet pipe. The second manual diaphragm valve, the cassette filter, the centrifugal pump, and the second pressure sensor are sequentially arranged on the main outlet pipe starting from the direction of the water storage tank.

[0012] Preferably, a third manual diaphragm valve is connected in series on each of the branch water pipes.

[0013] Preferably, a fourth manual diaphragm valve for controlling the on / off state is installed in series on each of the branch and return water pipes, and the fourth manual diaphragm valve, pressure gauge, back pressure valve and second thermal resistance are sequentially arranged on the branch and return water pipes starting from the direction of the re-inspection machine.

[0014] Preferably, a cassette-type sterile sampling valve is connected to the main return water pipe and the branch return water pipe.

[0015] Preferably, both the second valve and the third valve are pneumatic diaphragm valves.

[0016] The beneficial effects of this utility model are: First, this invention fundamentally solves the core problem of insufficient sterilization water temperature. Traditional centralized heating systems suffer from substandard terminal water temperatures due to long pipes and significant heat loss. This invention installs a water storage tank equipped with secondary heating directly next to the re-inspection machine, resulting in extremely short transport distances and minimal heat loss. This ensures a continuous supply of precisely and stably heated high-temperature sterilization water to the re-inspection machine, reliably guaranteeing the sterilization effect. Furthermore, it supports parallel sterilization and recycling of multiple machines.

[0017] Secondly, it achieves significant energy saving, consumption reduction and safety improvement; since there is no need to set the centralized heating temperature too high to compensate for the heat loss during long-distance transmission, the equipment of this utility model reduces the heating requirements of the circulating water in the front-end factory, effectively reducing the overall energy consumption and power load of the system, while avoiding potential safety hazards caused by the presence of ultra-high temperature media in the pipeline for a long time.

[0018] Furthermore, the equipment boasts a high degree of functional integration and is convenient for maintenance and monitoring. It replenishes water in a timely manner through the coordination of a tuning fork level gauge and a first valve, and stabilizes the system pressure through a back pressure valve. It also integrates multiple functions such as precision filtration, pressure and temperature monitoring, pipeline flushing and sewage discharge, and manual sampling. It can be set to three working modes (providing water for retesting, heating and sterilization, and sewage flushing). While ensuring water quality and process control, it also facilitates daily maintenance and status checks of the equipment, further guaranteeing the long-term stability of the system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a sterilization device for a hemodialysis re-inspection machine according to the present invention; Figure 2 for Figure 1 A three-dimensional structural diagram after removing the water return component and the re-inspection machine; Figure 3 for Figure 1 A three-dimensional structural diagram after removing the inlet water assembly, outlet water assembly, and re-inspection machine; Figure 4 This is a three-dimensional structural diagram of the water storage vessel; The following are the labeling instructions in the diagram: 11. Water storage vessel; 12. Tuning fork level gauge; 13. Heating element; 14. First RTD (Resistant Thermometer); 15. End cap; 16. Breathing valve; 17. Viewing window; 18. Ball valve; 19. Drain pipe; 21. Inlet pipe; 22. Connecting pipe; 23. First valve; 24. First manual diaphragm valve; 31. Main outlet pipe; 32. Second manual diaphragm valve; 33. Cartridge filter; 34. Centrifugal pump; 35. Second pressure sensor; 36. Branch outlet pipe; 37. Third manual diaphragm valve; 38. First pressure sensor; 39. Precision filter; 41. Main return pipe; 42. Second valve; 43. Branch return pipe; 44. Fourth manual diaphragm valve; 45. Pressure gauge; 46. Back pressure valve; 47. Second RTD; 51. Sewage pipe; 52. Third valve; 61. Cartridge aseptic sampling valve; 71. Re-inspection machine. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0021] Example, refer to Figures 1 to 4 As shown, this utility model discloses a sterilization device for a hemodialysis re-examination machine. The device mainly includes four components: heating, water inlet, water outlet and water return. It can simultaneously supply sterilization hot water to multiple re-examination machines 71 and circulate and recycle it. The heating component is based on a water storage tank 11, with built-in heating elements to heat the liquid, and the water temperature is monitored in real time through a first thermal resistor 14. The water inlet assembly supplies water to the water storage tank 11 through the water inlet pipe 21, and its opening and closing are controlled by the first valve 23; the water outlet assembly is connected to the centrifugal pump 34 through the main water outlet pipe 31, and branches out into multiple branch pipes. Each branch pipe is equipped with a pressure sensor and a precision filter 39, and each branch pipe is finally connected to the water inlet of each re-inspection machine 71; the water return assembly collects the liquid flowing back from the water outlet of the re-inspection machine 71 through the main water return pipe 41 and each branch pipe. Each branch pipe is equipped with a pressure gauge 45, a back pressure valve 46, and a second thermal resistor 47 to realize pressure and temperature monitoring; the main water return pipe 41 is also equipped with a drain pipe 51 with a third valve 52 for system sewage discharge.

[0022] This invention features a water storage tank 11 with a secondary heating function, directly installed next to the re-inspection machine 71. The transport distance is extremely short, resulting in minimal heat loss, thus ensuring a continuous supply of precisely heated and stable high-temperature sterilization water to the re-inspection machine 71. This reliably guarantees the sterilization effect and fundamentally solves the core problem of insufficient sterilization water temperature. Simultaneously, since there is no need to set the centralized heating temperature too high to compensate for heat loss during long-distance transport, this equipment reduces the heating requirements for the upstream factory's circulating water, effectively reducing the overall energy consumption and electrical load of the system. It also avoids potential safety hazards caused by the long-term presence of ultra-high-temperature media in the pipeline. Notably, it also supports multi-machine parallel sterilization and recycling, ensuring a stable, reliable, and efficient sterilization process through real-time monitoring and valve control.

[0023] In one specific embodiment, the heating assembly includes a water storage tank 11, a heating element 13 for heating the liquid inside the water storage tank 11, and a first thermal resistor 14 for monitoring the temperature of the liquid inside the water storage tank 11; the water storage tank 11 is provided with a plurality of tuning fork level gauges 12 distributed vertically for monitoring the liquid level inside; the tuning fork level gauges 12 monitor the liquid level inside the tank in real time, and use the feedback to control the opening and closing of the first valve 23 on the water inlet pipe 21, thereby replenishing water to the water storage tank 11 in real time. The top of the water storage tank 11 is equipped with a detachable end cap 15, which is fixed to the top of the water storage tank 11 by bolts. The end cap 15 is equipped with a breather valve 16 and a transparent viewing window 17. The breather valve 16 maintains the air pressure balance inside the water storage tank 11, reducing liquid evaporation. The viewing window 17 allows for easy manual inspection and confirmation of the environment inside the tank. The bottom of the water storage tank 11 is also equipped with a drain pipe 19 with a control ball valve 18, used to drain the liquid inside the water storage tank 11 for easy cleaning and waste removal. By directly installing the water storage tank 11, equipped with heating and temperature monitoring functions, next to the re-inspection machine 71, the transport distance is extremely short, and heat loss is negligible. This ensures a continuous supply of precisely temperatured and stable high-temperature sterilization water to the re-inspection machine 71, reliably guaranteeing the sterilization effect and fundamentally solving the core problem of insufficient sterilization water temperature.

[0024] In one specific embodiment, the water inlet assembly includes a water inlet pipe 21 connected to and installed on the top of the water storage tank 11 at one end, and a first valve 23 connected in series with the water inlet pipe 21 and controlling its opening and closing. The first valve 23 is a pneumatic diaphragm valve, which facilitates automatic control. A U-shaped connecting pipe 22 for connecting to the workshop circulation pipeline is installed at the free end of the water inlet pipe 21, that is, the connecting pipe 22 is connected to the factory's circulation water circuit. A first manual diaphragm valve 24 is also connected in series on the water inlet pipe 21 between the connecting pipe 22 and the first valve 23. The pneumatic diaphragm valve is used to realize the automatic connection and disconnection with the circulation water circuit. The manual diaphragm valve is used to cut off the connection with the factory's circulation water circuit during maintenance or repair. The settings of the manual diaphragm valve and the pneumatic diaphragm valve are the same below.

[0025] In one specific embodiment, the water outlet assembly includes a main water outlet pipe 31 connected to and installed at the bottom of the water storage tank 11, and multiple branch water outlet pipes 36 connected in parallel to the main water outlet pipe 31. A centrifugal pump 34, a second manual diaphragm valve 32, a cassette filter 33, and a second pressure sensor 35 are connected in series on the main water outlet pipe 31. The second manual diaphragm valve 32, the cassette filter 33, the centrifugal pump 34, and the second pressure sensor 35 are sequentially arranged on the main water outlet pipe 31, starting from the direction of the water storage tank 11. The second pressure sensor 35 is used to monitor the liquid pressure inside the main water outlet pipe 31, and the cassette filter 33 is used to filter the main water outlet pipe 31. The liquid inside undergoes coarse filtration; each of the branch water pipes 36 is connected in series with a third manual diaphragm valve 37, a first pressure sensor 38, and a precision filter 39, and the third manual diaphragm valve 37, the first pressure sensor 38, and the precision filter 39 are sequentially arranged on the corresponding branch water pipes 36 starting from the direction of the main water outlet pipe 31. The other end of each branch water pipe 36 is connected to the inlet of a re-inspection machine 71, thereby supporting multi-machine parallel sterilization and recycling. The first pressure sensor 38 is used to monitor the liquid pressure in the corresponding branch water pipe 36, and the precision filter 39 is used to finely filter the liquid in the branch water pipe 36.

[0026] In one specific embodiment, the water return assembly includes a main water return pipe 41 connected to and installed on the top of the water storage tank 11, and multiple branch water return pipes 43 connected in parallel to the main water return pipe 41. A second valve 42 for controlling its on / off state is installed in series on the main water return pipe 41; the second valve 42 is a pneumatic diaphragm valve. A drain pipe 51 and a cassette sterile sampling valve 61 are also connected to the main water return pipe 41. A third valve 52 for controlling its on / off state is installed in series on the drain pipe 51, and the third valve 52 is also a pneumatic diaphragm valve. After the re-inspection machine 71 completes sterilization, the water in the pipe is drained and the pipe is flushed by a centrifugal pump 34, thereby discharging the wastewater from the drain pipe 51 into the system. Each branch water return pipe 43 is equipped with a cassette sterile sampling valve. The sampling valve 61, the fourth manual diaphragm valve 44, the pressure gauge 45, the back pressure valve 46, and the second thermal resistor 47 are all connected at the other end of each of the branch and return water pipes 43 to the outlet of a re-inspection machine 71. The cassette-type aseptic sampling valve 61, the fourth manual diaphragm valve 44, the pressure gauge 45, the back pressure valve 46, and the second thermal resistor 47 are sequentially arranged on the branch and return water pipes 43 starting from the direction of the re-inspection machine 71. The pressure of the liquid in the corresponding branch and return water pipe 43 is monitored by the second thermal resistor 47. The back pressure valve 46 is used to maintain a constant pressure in the pipeline and the re-inspection machine 71 to prevent the pressure from being too low or too high. The cassette-type aseptic sampling valve 61 facilitates manual sampling and testing of the liquid in the pipeline and can maintain a sterile state during the sampling process to prevent microbial contamination of the sample.

[0027] This invention achieves automatic water replenishment through the cooperation of a tuning fork level gauge 12 and a first valve 23, and stabilizes the system pressure through a back pressure valve 46. When the re-inspection machine 71 is performing normal re-inspection work, the equipment of this invention only provides re-inspection water; at this time, no heating is required in the water storage tank 11, and water only needs to be automatically replenished according to the liquid level in the tank. When the re-inspection machine 71 needs sterilization, the equipment of this invention heats the liquid inside the water storage tank 11 through the heating element 13, that is, after heating the water in the water storage tank 11 to the sterilization temperature, it is supplied to the re-inspection machine 71 through a centrifugal pump 34 for sterilization. After the re-inspection machine 71 has completed sterilization... The centrifugal pump 34 removes and flushes the water stored in the pipeline and the re-inspection machine 71, thereby discharging the wastewater from the system through the drain pipe 51. This enables one-button automated operation of the entire process from sterilization to cleaning, which not only avoids the tediousness of manual tracking but also reduces human error and improves work efficiency and process consistency. At the same time, the equipment of this utility model integrates multiple functions such as precision filtration, real-time pressure and temperature monitoring, automatic pipeline flushing and sewage discharge, and manual sampling valve. While ensuring water quality and process controllability, it also facilitates daily maintenance and status inspection of the equipment, further ensuring the long-term stability of the system.

[0028] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A device for sterilizing a hemodialysis machine re-inspection unit, characterized in that, include: A heating assembly, comprising a water storage vessel, a heating element provided inside the water storage vessel for heating the liquid inside, and a first thermal resistor for monitoring the temperature of the liquid inside the water storage vessel; The water inlet assembly includes a water inlet pipe connected to and installed on a water storage tank at one end, and a first valve connected in series with the water inlet pipe and controlling its on / off state. The water outlet assembly includes a main water outlet pipe connected to and installed on a water storage tank, and multiple branch water outlet pipes connected in parallel to the main water outlet pipe. A centrifugal pump is connected in series on the main water outlet pipe, and a first pressure sensor and a precision filter are connected in series on each branch water outlet pipe. The other end of each branch water outlet pipe is connected to the water inlet of a re-inspection machine. The water return assembly includes a main water return pipe connected to and installed on a water storage tank, and multiple branch water return pipes connected in parallel to the main water return pipe. A second valve for controlling the on / off state is installed in series on the main water return pipe. Each branch water return pipe is equipped with a pressure gauge, a back pressure valve, and a second thermal resistor. The other end of each branch water return pipe is connected to the outlet of a re-inspection machine. A drain pipe is also connected to the main water return pipe, and a third valve for controlling the on / off state is installed in series on the drain pipe.

2. The device for sterilizing a hemodialysis machine re-inspection machine as described in claim 1, characterized in that, The water storage vessel is equipped with multiple tuning fork level gauges distributed vertically to monitor the internal liquid level.

3. The device for sterilizing a hemodialysis machine re-inspection machine as described in claim 1, characterized in that, The top of the water storage tank is equipped with a removable end cap, which has a breather valve and a transparent viewing window. The bottom of the water storage tank is also equipped with a drain pipe with a control ball valve.

4. The device for sterilizing a hemodialysis machine re-inspection machine as described in claim 1, characterized in that, The inlet pipe and the main return pipe are both installed at the top of the water storage tank, and the main outlet pipe is installed at the bottom of the water storage tank.

5. The equipment for sterilizing a hemodialysis machine re-inspection machine as described in claim 1, characterized in that, The free end of the water inlet pipe is equipped with a U-shaped connecting pipe for connecting to the workshop circulation pipeline. A first manual diaphragm valve is also connected in series on the water inlet pipe between the connecting pipe and the first valve. The first valve is a pneumatic diaphragm valve.

6. The device for sterilizing a hemodialysis machine re-inspection machine as described in claim 1, characterized in that, The main outlet pipe is also equipped with a second manual diaphragm valve, a cassette filter, and a second pressure sensor. The second manual diaphragm valve, the cassette filter, the centrifugal pump, and the second pressure sensor are sequentially arranged on the main outlet pipe starting from the direction of the water storage tank.

7. The device for sterilizing a hemodialysis machine re-inspection machine as described in claim 1, characterized in that, Each of the aforementioned branch water pipes is connected in series with a third manual diaphragm valve.

8. The equipment for sterilizing a hemodialysis machine re-inspection machine as described in claim 1, characterized in that, Each of the aforementioned branch and return water pipes is connected in series with a fourth manual diaphragm valve to control its on / off state, and the fourth manual diaphragm valve, pressure gauge, back pressure valve, and second thermal resistance are sequentially arranged on the branch and return water pipes starting from the direction of the re-inspection machine.

9. The device for sterilizing a hemodialysis machine re-inspection machine as described in claim 1, characterized in that, The main return water pipe and the branch return water pipes are connected to cassette sterile sampling valves.

10. The device for sterilizing a hemodialysis machine re-inspection machine as described in claim 1, characterized in that, Both the second and third valves are pneumatic diaphragm valves.

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