Portable SDI automatic tester

Abstract

The utility model relates to a portable SDI automatic tester which comprises a box body, a pipeline, a disposable filter, a self-adaptive pressure boosting and stabilizing assembly, a data acquisition assembly and a data processor, a setting space is arranged in the box body, and a water inlet and a water outlet are formed in the surface of the box body; the pipeline penetrates into the arrangement space from the water inlet and penetrates out of the water outlet; the disposable filter is detachably connected with the pipeline penetrating out of the water outlet; the self-adaptive pressure boosting and stabilizing assembly is connected to the pipeline in the setting space; the data acquisition assembly is connected to a pipeline in the setting space and is used for acquiring flow, temperature and pressure; and the data processor is arranged in the box body, is connected with the booster pump and the data acquisition assembly, and is used for automatically calculating an SDI value. Through the highly integrated system design, the problems that traditional equipment is not easy to carry, tedious to operate and large in error are solved, and the device is suitable for evaluating the pollution blocking risk of water filtering equipment in various scenes, and helps a user to estimate the service life of a filter element and optimize the maintenance period and the system configuration.

Description

Technical Field

[0001] This utility model relates to the field of water quality testing technology, specifically to a portable automatic SDI measuring instrument. Background Technology

[0002] In recent years, as people's requirements for water treatment technology have continued to increase, it is necessary to select appropriate water treatment technologies according to different water quality conditions to ensure the long-term stable operation of water treatment equipment.

[0003] Sludge density index (SDI) is one of the important indicators for determining the quality of influent water to water filtration equipment, and it is also a primary means of verifying whether the influent water quality meets the requirements. Its value is crucial to the service life of water filtration equipment. It characterizes the content of particles, colloids, and other substances in the water that can clog various water filtration devices. By measuring the SDI value, appropriate pretreatment can be selected to ensure the efficient operation of the water filtration equipment.

[0004] However, traditional SDI measuring instruments rely on manual operation, which involves cumbersome testing procedures, high technical barriers, large deviations in test results, and poor repeatability. Manual measurement requires on-site setup of the testing equipment, which is time-consuming and labor-intensive. Manually loading the film, manually controlling the pressure, and manually timing are inefficient and prone to errors. Manually calculating SDI using formulas has certain technical barriers. Furthermore, the lack of temperature calibration results in large deviations in test results.

[0005] Currently, while commonly used SDI automatic testing instruments have solved the error problem caused by manual measurement, some issues still exist when used under complex field conditions. For example, they lack adaptability to low-pressure environments: when the inlet water pressure fluctuates significantly, an external booster pump and pressure stabilizing valve are required, increasing operational complexity and equipment costs; they have poor portability: similar products are large and heavy, making them very inconvenient to carry; and they lack expandability: they cannot directly output standardized signals and cannot communicate with other devices. Summary of the Invention

[0006] The purpose of this invention is to provide a portable automatic SDI analyzer, particularly a compact and portable automatic SDI analyzer that provides accurate test results and is suitable for various water quality testing scenarios.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A portable automatic SDI measuring instrument, comprising:

[0009] Box body: The box body has a set space inside, and the surface of the box body is provided with a water inlet and a water outlet, which are connected to the set space;

[0010] Piping: The piping enters the installation space from the water inlet and exits from the water outlet;

[0011] Disposable filter: The disposable filter is detachably connected to the pipe extending out of the outlet;

[0012] Data acquisition component: The data acquisition component is connected to the pipeline within the set space and is used to collect at least one of flow rate, temperature, and pressure.

[0013] Adaptive boosting and stabilizing component: The adaptive boosting and stabilizing component is connected to the pipeline within the set space and is used for boosting and stabilizing the pipeline.

[0014] Data processor: The data processor is installed inside the housing and connected to the data acquisition component, and is used to automatically calculate the SDI value.

[0015] Preferably, the disposable filter includes a housing and a filter membrane. The housing has a filtration space inside. The housing has an inlet and an outlet at both ends of the filtration space. The inlet is detachably connected to the outlet via a pipe. The filter membrane is disposed within the filtration space. The disposable filter is connected to the housing via a quick-connect plug, making assembly and disassembly convenient and saving time and effort.

[0016] More preferably, the filter membrane is a microfiltration membrane with a pore size of 0.45 μm. Even more preferably, the microfiltration membrane is a mixed fiber ester membrane (MCE) or an equivalent hydrophilic membrane.

[0017] Preferably, in the above technical solution, the data acquisition component includes a flow sensor, a temperature sensor, and a pressure sensor. The flow sensor, temperature sensor, and pressure sensor are installed on the pipeline and connected to the data processor. The flow sensor, temperature sensor, and pressure sensor are miniature sensors, which are smaller and cheaper than industrial sensors, further reducing the size of the automatic measuring instrument.

[0018] More preferably, the adaptive boosting and stabilizing component includes a booster pump, which is connected to a pipeline upstream of the data acquisition component. The booster pump is connected to the data processor and / or the pressure sensor. For measurement environments with low water pressure, the booster pump can increase the water pressure to meet different usage scenarios and make the automatic measuring instrument more universal.

[0019] More preferably, the adaptive boosting and stabilizing assembly includes a pressure stabilizing valve connected to a pipeline downstream of the pressure sensor, for stabilizing the pre-membrane pressure of the disposable filter at approximately 0.21 MPa (30 psi).

[0020] Preferably, in the above technical solution, the automatic measuring instrument further includes an operation / display panel, which is disposed on the outer surface of the housing and connected to the data processor. The operation / display panel can guide the user's operation and display the output results to the user, making it convenient to read real-time data and historical records.

[0021] Preferably, the data processor is equipped with a communication interface; the communication interface is equipped with a communication module for realizing 4G and / or WiFi communication, and the measurement data can be easily transmitted or uploaded to the cloud platform through the communication interface.

[0022] Preferably, in the above technical solution, the automatic measuring instrument further includes a power module, which supplies power to the various components in the automatic measuring instrument. The power module is a battery or an AC power interface. The battery is disposed in the setting space, and the AC power interface is disposed on the outer surface of the housing.

[0023] Preferably, the length of the box is no more than 215mm, the width is no more than 80mm, and the height is no more than 70mm, making it compact and easy to carry.

[0024] Preferably, the automatic measuring instrument weighs no more than 1 kg, which is much lighter than similar products. The entire automatic measuring instrument is highly integrated and easy to carry.

[0025] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0026] This invention solves the problems of traditional equipment being difficult to carry, cumbersome to operate, and having large errors through a highly integrated system design. It is applicable to the assessment of the clogging risk of water filtration equipment in various scenarios, helping users to estimate the life of filter cartridges and optimize maintenance cycles and system configurations. Attached Figure Description

[0027] Appendix Figure 1 This is a schematic diagram of the external structure of the automatic measuring instrument in this utility model;

[0028] Appendix Figure 2 This is a schematic diagram of the internal connection relationship of the automatic measuring instrument in this utility model;

[0029] Appendix Figure 3This is a schematic diagram of the structure of the disposable filter in this utility model.

[0030] In the attached diagrams above:

[0031] 1. Container; 10. Inlet; 11. Outlet;

[0032] 2. Piping;

[0033] 3. Disposable filter; 30. Housing; 300. Inlet water interface; 301. Outlet water interface; 31. Filter membrane;

[0034] 40. Flow sensor; 41. Temperature sensor; 42. Pressure sensor;

[0035] 5. Data processor; 50. Operation / display panel;

[0036] 60. Booster pump; 61. Pressure regulating valve;

[0037] 7. Mains power interface. Detailed Implementation

[0038] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] like Figure 1 , 2 The portable SDI automatic measuring instrument shown includes a housing 1, piping 2, a disposable filter 3, a data acquisition component, a data processor 5, an adaptive boost voltage regulator component, and a power supply module. The following provides a detailed description of each component.

[0041] The enclosure 1 has an internal space for the data acquisition components, data processor 5, adaptive boost and voltage regulator components, power supply module, etc. The surface of the enclosure 1 has a water inlet 10 and a water outlet 11, which communicate with the internal space. In the diagram, the water inlet 10 and water outlet 11 are located at the top of the enclosure 1. The enclosure 1 features an integrated shell design, making it waterproof and dustproof.

[0042] In this embodiment: the length of the box 1 is no more than 215mm; the width is no more than 80mm; and the height is no more than 70mm. It is small in size and easy to carry. The box 1 in the figure is 210×55×65mm as an example.

[0043] Pipe 2 enters the installation space from the inlet 10 and exits from the outlet 11.

[0044] The disposable filter 3 is detachably connected to the pipe 2 that passes through the outlet 11. The disposable filter 3 can be replaced after use, which is convenient to install and remove, saving time and effort. Compared with the traditional membrane tank, which is reusable and requires membrane replacement every time, the disposable filter 3 does not have the membrane replacement steps and air venting problems.

[0045] In this embodiment: as Figure 3 As shown: The disposable filter 3 includes a housing 30 and a filter membrane 31. The housing 30 has an internal filtration space. At both ends of the housing 30 within the filtration space are an inlet port 300 and an outlet port 301. The inlet port 300 is detachably connected to the outlet port 10 via a pipe 2, such as a Luer connector. To facilitate easy assembly and disassembly of the disposable filter 3, it is located outside the housing 1. The filter membrane 31 is disposed within the filtration space and is selected from 0.45µm microfiltration membranes, preferably MCE mixed cellulose ester microporous membranes. The housing 30 of the disposable filter 3 has a diameter of approximately 25mm and a much smaller internal cavity, resulting in very little air. Furthermore, by cleaning the pipe 2, air bubbles in the pipe 2 can be removed before testing.

[0046] The data acquisition component is connected to the pipeline 2 within the set space to collect at least one of the following: flow rate, temperature, and pressure. It automatically records the flow rate, temperature, and pressure values ​​and sends them to the data processor 5.

[0047] In this embodiment, the data acquisition component includes a flow sensor 40, a temperature sensor 41, and a pressure sensor 42. These sensors are mounted on the pipeline 2 and connected to the data processor 5. Specifically, the flow sensor 40 monitors the water flow rate, allowing direct measurement of the collected water volume and eliminating the need for storage and metering components such as water tanks. The temperature sensor 41 monitors the water temperature, enabling the determination of the hydrodynamic viscosity at the test water temperature for SDI value correction. The pressure sensor 42 monitors the water pressure, providing real-time feedback to the data processor 5 to adjust the output power of the booster pump 60 and ensure stable pressure before the membrane. As shown in the diagram, the flow sensor 40, temperature sensor 41, and pressure sensor 42 are sequentially arranged along the inlet and outlet directions of the pipeline 2. All three sensors are high-precision miniature sensors, which are smaller and cheaper than industrial sensors, further reducing the size of the automatic measuring instrument.

[0048] Data processor 5 is housed within enclosure 1 and connected to the data acquisition component. Data processor 5 is configured with the automatic measuring instrument's calculation module to automatically calculate SDI values. Of course, as an extension of the measurement data, data processor 5 can also be configured to automatically calculate MFI values ​​(corrected pollution index) to meet different measurement needs. Data processor 5 achieves automatic measurement through preset programs; its operation is simple and can be quickly mastered even by non-professionals.

[0049] In one embodiment of this invention: the data processor 5 is equipped with an operation / display panel 50, which is disposed on the outer surface of the housing 1. The operation / display panel 50 can guide the user's operation and display the output results to the user, facilitating the reading of real-time data and historical records. The operation / display panel 50 can be a touch screen, and the data processor 5 can adopt a TP-PCBA structure.

[0050] In another embodiment of this example: the data processor 5 is equipped with a communication interface, such as a 4-20mA analog signal output and an RS485 interface; the communication interface is equipped with a communication module for realizing 4G and / or WiFi communication, and the measurement data can be easily transmitted or uploaded to the cloud platform through the communication interface.

[0051] The adaptive booster and pressure stabilization assembly ensures that there are no requirements for the inlet water pressure, and can even be used to collect water samples on-site for testing. It includes a booster pump 60 and a pressure stabilizing valve 61. The booster pump 60 and the pressure stabilizing valve 61 are connected to the pipeline 2 in the set space. The booster pump 60 is connected to the pipeline 2 upstream of the data acquisition assembly, that is, upstream of the flow sensor 40. For measurement environments with low water pressure, the booster pump 60 can increase the water pressure to above 0.21 MPa (30 psi). The pressure stabilizing valve 61 is connected to the pipeline 2 downstream of the pressure sensor 42. The pressure stabilizing valve 61 is used to stabilize the pre-membrane pressure of the disposable filter 3 at about 0.21 MPa (30 psi).

[0052] The power module supplies power to all components in the automatic measuring instrument. The power module is a battery and / or an AC power interface 7. The battery can be a lithium battery and is located in the setting space. The AC power interface 7 is located on the outer surface of the housing 1 for connecting to AC power. Both methods are available.

[0053] The automatic measuring instrument in this embodiment weighs no more than 1kg, which is much lighter than similar products. The entire automatic measuring instrument is highly integrated and easy to carry.

[0054] During the measurement process: Data processor 5 calculates the SDI value using the following formula:

[0055]

[0056] Where: f0 is the time (in seconds) required for the initial collection of the set water sample; f t The time (in seconds) required to collect a set water sample again after a continuous filtration time T; T is the cumulative filtration time (in minutes), which is usually 0 to 15 minutes.

[0057] In this embodiment: by introducing temperature calibration, the influence of environmental factors (0℃~55℃) on the test results is eliminated, thereby improving the accuracy of the measurement. Specifically, the corrected SDI value is calculated using the following formula:

[0058]

[0059] Where: η t To test the hydrodynamic viscosity at water temperature, η 25℃ The hydrodynamic viscosity is measured at a water temperature of 25°C.

[0060] In this embodiment, a dual pressure control system is included, consisting of a pressure negative feedback control of the booster pump power and a pressure regulating valve, to achieve dynamic stabilization of the membrane inlet pressure at 0.207±0.002Mpa (30±0.3psi).

[0061] Example:

[0062] The automatic measuring instrument of this embodiment is used to automatically measure the SDI of water source 1-5.

[0063] Filter membrane: MCE microfiltration membrane; Test conditions: 20±0.2℃; Inlet water: tap water; Pressure: 0.207±0.007Mpa.

[0064] water source SDI <![CDATA[SDI 修正 ]]> error Water source 1 3.01 3.07 2％ Water Source 2 4.22 4.3 2％ Water source 3 5.11 5.05 -1.2％ Water source 4 5.61 5.6 -0.2％ Water source 5 6.25 6.25 0％

[0065] Compared to existing SDI testers, which can have a testing error of ±20% in pressure environments below 0.15MPa, the device in this embodiment can control the error within ±2% under the same working conditions.

[0066] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A portable automatic SDI measuring instrument, characterized in that: include: Box body: The box body has a set space inside, and the surface of the box body is provided with a water inlet and a water outlet, which are connected to the set space; Piping: The piping enters the installation space from the water inlet and exits from the water outlet; Disposable filter: The disposable filter is detachably connected to the pipe extending out of the outlet; Adaptive boosting and stabilizing component: The adaptive boosting and stabilizing component is connected to the pipeline within the set space and is used for boosting and stabilizing the pipeline. Data acquisition component: The data acquisition component is connected to the pipeline within the set space and is used to collect at least one of flow rate, temperature, and pressure. Data processor: The data processor is installed inside the housing and connected to the data acquisition component, and is used to automatically calculate the SDI value.

2. The portable SDI automatic measuring instrument according to claim 1, characterized in that: The disposable filter includes a housing and a filter membrane. The housing has a filtration space inside. The housing has an inlet and an outlet at both ends of the filtration space. The inlet is detachably connected to a pipe that extends through the outlet. The filter membrane is disposed within the filtration space.

3. The portable SDI automatic measuring instrument according to claim 2, characterized in that: The filter membrane is a microfiltration membrane.

4. The portable SDI automatic measuring instrument according to claim 1, characterized in that: The data acquisition component includes a flow sensor, a temperature sensor, and a pressure sensor, which are installed on the pipeline and connected to the data processor.

5. The portable SDI automatic measuring instrument according to claim 4, characterized in that: The adaptive booster and voltage regulator assembly includes a booster pump connected to a pipeline upstream of the data acquisition assembly, and the booster pump is connected to the data processor and / or the pressure sensor.

6. The portable SDI automatic measuring instrument according to claim 4, characterized in that: The adaptive boosting and stabilizing assembly includes a pressure stabilizing valve connected to a pipeline downstream of the pressure sensor.

7. The portable SDI automatic measuring instrument according to claim 1, characterized in that: The automatic measuring instrument also includes an operation / display panel, which is disposed on the outer surface of the housing and connected to the data processor.

8. The portable SDI automatic measuring instrument according to claim 1, characterized in that: The data processor is equipped with a communication interface; The communication interface is equipped with a communication module for enabling 4G and / or WiFi communication.

9. The portable SDI automatic measuring instrument according to claim 1, characterized in that: The automatic measuring instrument also includes a power module, which supplies power to the various components in the automatic measuring instrument. The power module is a battery and / or an AC power interface. The battery is located in the setting space, and the AC power interface is located on the outer surface of the housing.

10. The portable SDI automatic measuring instrument according to claim 1, characterized in that: The length of the enclosure is no greater than 215mm; the width is no greater than 80mm; and the height is no greater than 70mm. The total weight of the automatic measuring instrument is no more than 1 kg.

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