Pressure calibration loop structure of hemodialysis device detector calibration device

Abstract

The utility model discloses a hemodialysis device detector calibration device pressure calibration loop structure which comprises a bottom plate, a control module and a pressure calibration module, the control module and the pressure calibration module are both arranged on the bottom plate, and the control module is connected with the pressure calibration module; the pressure calibration module comprises a pressurization unit, a pressure bearing unit and a pressure regulation and control unit; the pressure bearing unit is connected with the pressurizing unit and the pressure regulation and control unit through pipelines, the pressurizing unit is used for pressurizing the pressure bearing unit, and the pressure regulation and control unit is used for detecting and regulating the pressure of the pressure bearing unit; according to the utility model, the control module and the pressure calibration module are arranged on the bottom plate, and the pressurization unit, the pressure bearing unit and the pressure regulation and control unit in the pressure calibration module are controlled by the control module, so that the pressure parameters of the hemodialysis device detector can be calibrated, the design is reasonable, a stable pressure source can be accurately generated, and the detection accuracy is improved. And the accuracy and the reliability of the calibration result of the hemodialysis device detector are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of instrument calibration technology, specifically relating to a pressure calibration loop structure for a blood dialysis device detector calibration device. Background Technology

[0002] A hemodialysis device testing instrument is a calibration device used to test and evaluate the performance and quality of hemodialysis devices. Its main function is to test and evaluate various performance indicators of the hemodialysis device, such as flow rate, pressure, temperature, conductivity, and pH value, thereby ensuring the performance and quality of the device. The accuracy and reliability of these indicators directly affect patient safety and treatment outcomes; therefore, accurate calibration of the testing instrument is essential. Currently, hemodialysis devices in hospitals are calibrated using testing instruments, typically once a year. However, the traceability system is not yet fully developed, which poses an indirect safety hazard. Ensuring the accuracy of the flow rate, pressure, temperature, conductivity, and pH value measured by the testing instrument is crucial for ensuring the safety and reliability of patient treatment. Developing a scientific and reasonable quality control plan for in-use hemodialysis devices and conducting regular metrological calibration are important aspects of preventative maintenance in quality control and are fundamental means of ensuring the accuracy of related medical equipment measurements.

[0003] The calibration device for hemodialysis device testing instruments can effectively calibrate and trace the parameters of flow rate, pressure, temperature, conductivity, and pH value of hemodialysis device testing instruments. It can calibrate various models of hemodialysis device testing instruments from different manufacturers, meeting the requirements for value transfer in the national metrological verification system and the establishment requirements of social public metrological standards. The calibration device includes: a flow rate parameter calibration module, a pressure parameter calibration module, a temperature parameter calibration module, a conductivity parameter calibration module, a pH value parameter calibration module, and a control module. The calibration modules calibrate the flow rate, pressure, temperature, conductivity, and pH value of the hemodialysis device testing instrument, respectively. The control module consists of a controller and control software for process control and data processing. Utility Model Content

[0004] The purpose of this utility model is to provide a pressure calibration circuit structure for a hemodialysis device testing instrument calibration device. By setting a control module and a pressure calibration module on the base plate, and controlling the pressurization unit, pressure bearing unit and pressure regulation unit in the pressure calibration module through the control module, the pressure parameters of the hemodialysis device testing instrument can be calibrated. The design is reasonable and can accurately generate a stable pressure source, ensuring the accuracy and reliability of the calibration results of the hemodialysis device testing instrument.

[0005] This utility model is achieved through the following technical solution:

[0006] A pressure calibration loop structure for a hemodialysis device calibration instrument includes a base plate, a control module, and a pressure calibration module. Both the control module and the pressure calibration module are mounted on the base plate, and the control module is connected to the pressure calibration module. The pressure calibration module includes a pressurizing unit, a pressure-bearing unit, and a pressure regulating unit. The pressure-bearing unit is connected to both the pressurizing unit and the pressure regulating unit via pipelines. The pressurizing unit pressurizes the pressure-bearing unit, and the pressure regulating unit detects and regulates the pressure of the pressure-bearing unit.

[0007] Furthermore, the pressurization unit includes a filter and a pump, the filter is connected to the pump and is located at the front end of the pump; the pump has an air inlet pipe at its air inlet end, the base plate has a through hole, and the end of the air inlet pipe extends to the position of the through hole.

[0008] Furthermore, the pressure-bearing unit includes a pressure vessel, with an inlet regulating valve and an outlet regulating valve respectively provided at the inlet and outlet ends of the pressure vessel. The inlet regulating valve is located between the pressure vessel and the pump, and the outlet regulating valve is located at the outlet end of the pressure vessel.

[0009] Furthermore, a fixing member is provided on the base plate, and the pressure vessel is mounted on the fixing member, which keeps the bottom of the pressure vessel at a distance from the base plate.

[0010] Furthermore, the pressure control unit includes a pressure transmitter and a solenoid valve. The pressure transmitter is connected to the outlet end of the pressure vessel, the solenoid valve is located at the rear end of the pressure transmitter, and the outlet regulating valve is located between the pressure transmitter and the solenoid valve. A connecting pipe is connected to the pipeline between the pressure transmitter and the solenoid valve, and a plug is provided at the end of the connecting pipe.

[0011] Furthermore, the control module includes an industrial computer and a controller. The industrial computer is connected to the controller, and the controller is connected to the pump, solenoid valve, inlet regulating valve, outlet regulating valve, and pressure transmitter, respectively.

[0012] Furthermore, a shell is provided on the base plate, and four support beams are provided at the four corners of the base plate. The shell is sleeved on the outside of the four support beams and connected to the base plate; the plug at the end of the connecting pipe is provided on the surface of the shell.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] In this invention, a control module and a pressure calibration module are set on the base plate. The control module controls the pressurization unit, pressure bearing unit, and pressure regulation unit in the pressure calibration module, thereby calibrating the pressure parameters of the hemodialysis device detector. The design is reasonable and can accurately generate a stable pressure source, ensuring the accuracy and reliability of the calibration results of the hemodialysis device detector. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the pressure calibration circuit in the calibration device of the hemodialysis device detector of this utility model.

[0017] Figure 2 This is a schematic diagram of the connection logic of the pressure calibration circuit in the calibration device of the hemodialysis device detector of this utility model.

[0018] Wherein: 1-Pump, 11-Inlet pipe, 2-Filter, 3-Pressure vessel, 31-Fixed component, 4-Inlet regulating valve, 5-Outlet regulating valve, 6-Pressure transmitter, 7-Solenoid valve, 8-Connecting pipe, 81-Plug, 9-Base plate, 10-Support beam, 20-Shell, 30-Hemodialysis device. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0020] Example 1:

[0021] A pressure calibration loop structure for a hemodialysis device testing and calibration device, such as... Figure 1 and Figure 2As shown, the system includes a base plate 9, a control module, and a pressure calibration module. Both the control module and the pressure calibration module are mounted on the base plate 9, and the control module is connected to the pressure calibration module. The pressure calibration module includes a pressurizing unit, a pressure-bearing unit, and a pressure regulating unit. The control module is connected to the pressurizing unit, the pressure-bearing unit, and the pressure regulating unit, respectively. The pressure-bearing unit is connected to the pressurizing unit and the pressure regulating unit via pipelines. The pressurizing unit is used to pressurize the pressure-bearing unit, and the pressure regulating unit is used to detect and regulate the pressure of the pressure-bearing unit. The pressurizing unit includes a filter 2 and a pump 1, with the filter 2 connected to the pump 1. The filter 2 is located at the front end of the pump 1. The air inlet end of the pump 1 is provided with an air inlet pipe 11. The base plate 9 is provided with a through hole. The end of the air inlet pipe 11 extends to the position of the through hole. The filter 2 is located close to the pump 1. The pump 1 draws in air through the air inlet pipe 11. The gas is filtered by the filter 2 and pressurized into the pressure unit. The base plate 9 is provided with a housing 20. Four support beams 10 are provided at the four corners of the base plate 9. The support beams 10 are welded to the base plate 9. The housing 20 is fitted on the outside of the four support beams 10 and connected to the base plate 9. The four support beams 10 are used to position the housing 20 and facilitate the installation of the housing 20.

[0022] Example 2:

[0023] This embodiment, based on the above embodiment, further defines a pressure-bearing unit, which includes a pressure vessel 3. An inlet regulating valve 4 and an outlet regulating valve 5 are respectively installed at the inlet and outlet ends of the pressure vessel 3. Both the inlet regulating valve 4 and the outlet regulating valve 5 are connected to the pressure vessel 3 via pipelines. The pipeline at the inlet regulating valve 4 is connected to the bottom of the pressure vessel 3, and the pipeline at the outlet regulating valve 5 is connected to the top of the pressure vessel 3. The inlet regulating valve 4 is located between the pressure vessel 3 and the pump 1, and the outlet regulating valve 5 is located at the outlet end of the pressure vessel 3. A fixing member 31 is provided on the base plate 9, protruding in the middle. Both ends of the fixing member 31 are connected to the base plate 9 by bolts. The pressure vessel 3 is located in the middle of the fixing member 31, and the fixing member 31 is fitted onto the pressure vessel 3 to fix it. The fixing member 31 maintains a gap between the bottom of the pressure vessel 3 and the base plate 9, facilitating pipeline installation. The other parts of this embodiment are the same as those in the above embodiment and will not be repeated here.

[0024] Example 3:

[0025] Based on the above embodiments, this embodiment further defines a pressure regulation unit and a control module. The pressure regulation unit includes a pressure transmitter 6 and a solenoid valve 7. The pressure transmitter 6 is connected to the outlet end of the pressure vessel 3. The solenoid valve 7 is located at the rear end of the pressure transmitter 6. The outlet regulating valve 5 is located between the pressure transmitter 6 and the solenoid valve 7. A connecting pipe 8 is connected to the pipeline between the pressure transmitter 6 and the solenoid valve 7. A plug 81 is provided at the end of the connecting pipe 8. The plug 81 at the end of the connecting pipe 8 is located on the surface of the housing 20. The pressure sensor in the hemodialysis device 30 being tested is connected to the connecting pipe 8 and calibrated by the pressure calibration module. The control module includes an industrial computer and a controller. The industrial computer is connected to the controller. The controller is connected to the pump 1, the solenoid valve 7, the inlet regulating valve 4, the outlet regulating valve 5, and the pressure transmitter 6, respectively.

[0026] The industrial computer is equipped with calibration software, which sends calibration parameters to the controller. The controller controls the solenoid valve 7 to open and close, and controls the pump 1 to pressurize the pressure vessel 3. The controller measures the pressure inside the pressure vessel 3 through the pressure transmitter 6, and controls the inlet regulating valve 4 and the outlet regulating valve 5 to accurately control the pressure inside the vessel.

[0027] The calibration pressure is a boost calibration. The industrial control computer sends a command to the controller. After receiving the target pressure, the controller executes the command in two parts. First, it rapidly pressurizes the pressure vessel 3. After reaching the predetermined value, it slowly pressurizes the pressure vessel 3 until the target pressure is reached. The controller rapidly pressurizes the vessel, with the inlet regulating valve 4 fully open and the outlet regulating valve 5 and solenoid valve 7 closed. The controller outputs a PWM waveform with a duty cycle of 60% to control pump 1 to rapidly pressurize the pressure vessel 3. When the target value is about to be reached, the controller outputs a PWM waveform with a duty cycle of 30% to control pump 1 to slowly pressurize the pressure vessel 3. At the same time, the controller outputs a PWM wave to control the opening of the inlet regulating valve 4 to gradually decrease. When the pressure reaches the target value, the inlet regulating valve 4 is closed, and the pressurization ends. To prevent the pressure vessel 3 from exceeding the target value, an outlet regulating valve 5 is added to fine-tune the pressure. During pressure calibration, the external sensor or hemodialysis device to be tested is connected to the plug, and the pressure of the pressure sensor or hemodialysis device being tested and the pressure value of the pressure transmitter 6 are observed to see if they are within the specified range, and whether they are too high or too low, so adjustments are made accordingly. After the pressure calibration is completed, the pressure of the pressure vessel 3 is released through the solenoid valve 7. The other parts of this embodiment are the same as those in the above embodiment, and will not be repeated here.

[0028] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A pressure calibration loop structure for a hemodialysis device testing and calibration instrument, characterized in that, The system includes a base plate, a control module, and a pressure calibration module. Both the control module and the pressure calibration module are mounted on the base plate, and the control module is connected to the pressure calibration module. The pressure calibration module includes a pressurization unit, a pressure-bearing unit, and a pressure regulating unit. The pressure-bearing unit is connected to both the pressurization unit and the pressure regulating unit via pipelines. The pressurization unit pressurizes the pressure-bearing unit, and the pressure regulating unit detects and regulates the pressure of the pressure-bearing unit. The pressurization unit includes a filter and a pump. The filter is connected to the pump and is located at the front end of the pump. The pump has an air inlet pipe at its inlet end, and the base plate has a through hole, with the end of the air inlet pipe extending to the through hole.

2. The pressure calibration loop structure of the hemodialysis device testing instrument calibration device as described in claim 1, characterized in that, The pressure-bearing unit includes a pressure vessel, and an inlet regulating valve and an outlet regulating valve are respectively provided at the inlet end and the outlet end of the pressure vessel. The inlet regulating valve is located between the pressure vessel and the pump, and the outlet regulating valve is located at the outlet end of the pressure vessel.

3. The pressure calibration loop structure of the hemodialysis device testing instrument calibration device as described in claim 2, characterized in that, A fixing component is provided on the base plate, and the pressure vessel is mounted on the fixing component, which keeps the bottom of the pressure vessel at a distance from the base plate.

4. The pressure calibration loop structure of the hemodialysis device testing instrument calibration device as described in claim 2, characterized in that, The pressure control unit includes a pressure transmitter and a solenoid valve. The pressure transmitter is connected to the outlet end of the pressure vessel. The solenoid valve is located at the rear end of the pressure transmitter. The outlet regulating valve is located between the pressure transmitter and the solenoid valve. A connecting pipe is connected between the pressure transmitter and the solenoid valve, and a plug is provided at the end of the connecting pipe.

5. The pressure calibration loop structure of the hemodialysis device testing instrument calibration device as described in claim 4, characterized in that, The control module includes an industrial computer and a controller. The industrial computer is connected to the controller, and the controller is connected to the pump, solenoid valve, inlet regulating valve, outlet regulating valve and pressure transmitter respectively.

6. The pressure calibration loop structure of the hemodialysis device testing instrument calibration device as described in claim 5, characterized in that, A housing is provided on the base plate, and four support beams are provided at the four corners of the base plate. The housing is sleeved on the outside of the four support beams and connected to the base plate; the plug at the end of the connecting pipe is provided on the surface of the housing.

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