Automatic sludge specific resistance experiment device

Abstract

The application relates to the field of sludge experimental detection, in particular to a sludge automatic specific resistance experiment device.The device comprises a sludge automatic specific resistance experiment device, which comprises a platform frame body provided with a filtering station, a sludge extraction mechanism arranged on the platform frame body and used for conveying sludge to the filtering station, a sludge filtering mechanism comprising a measuring cup, a filtering element, a second control valve, a funnel, a vacuum generating device, a third control valve, a liquid discharge pipe and a filtrate detection sensor, and an electric control box electrically connected with the first control valve, the second control valve, the vacuum generating device, the third control valve and the filtrate detection sensor.The application achieves the effect of realizing automatic detection of sludge specific resistance experiment, effectively reduces manual operation errors, improves experimental accuracy and efficiency, ensures that experimental data are accurate and reliable, and provides stable and high-quality experimental data support for sludge treatment.

Description

Technical Field

[0001] This application relates to the field of sludge testing, and in particular to an automatic sludge resistivity testing device. Background Technology

[0002] With increasing environmental awareness and ever-improving environmental requirements, the harmless, reduced-volume, and resource-based disposal of sludge, a significant byproduct of wastewater treatment, has become a key focus in environmental engineering. Against this backdrop, accurate and efficient testing and evaluation of sludge dewatering performance are crucial for optimizing sludge treatment processes, selecting dewatering agents, and choosing final disposal methods. Sludge specific resistance is one of the core parameters characterizing sludge dewatering performance, and its measurement results directly affect the selection of subsequent dewatering equipment and the setting of operating parameters. Therefore, sludge specific resistance testing devices have wide applications in environmental protection enterprises, research institutes, university laboratories, environmental monitoring agencies, and wastewater treatment plants.

[0003] Currently, traditional sludge specific resistivity determination mainly relies on manual operation. A typical experimental method involves: manually constructing a filtration system consisting of a Buchner funnel, a filtration flask, and a vacuum pump; manually measuring a quantitative sludge sample, adding a coagulant aid, and mixing; then, under a manually maintained constant negative pressure, initiating the filtration process, with the experimenter monitoring the entire process, manually timing and recording the filtrate volume at different time points; finally, based on Darcy's law and the basic filtration equation, combined with parameters such as filter paper area, filtration pressure, and sludge concentration, the sludge specific resistivity is calculated.

[0004] However, the aforementioned manual experimental methods have many inherent drawbacks, which severely limit the accuracy, efficiency, and application scope of the experiments: 1. Large operational error and poor repeatability: During the experiment, the stability of negative pressure, the uniformity of mixing of coagulant and sludge, the accuracy of filtrate volume reading and timing are all highly dependent on the experience and proficiency of the operators. The random error introduced by humans is large, resulting in poor repeatability of experimental results between different batches or different operators.

[0005] 2. The process is cumbersome and time-consuming: The entire experimental process is complicated and requires the experimenters to be highly focused throughout the process and to perform frequent manual operations and recording. The degree of automation is low, and it consumes a lot of manpower and time.

[0006] 3. Limited data capture capability: Manual recording can usually only obtain discrete filtrate volume data at a limited time point, making it difficult to capture dynamic changes throughout the filtration process in real time, continuously and accurately, which may result in the loss of key details reflecting the sludge filtration characteristics.

[0007] 4. Low throughput and difficulty in scaling: This method relies heavily on manual step-by-step operation, and cannot achieve parallel or continuous automatic detection of multiple samples. The low throughput makes it difficult to meet the needs of large-scale sample screening, rapid comparison of process parameters, or systematic scientific research for large-scale data acquisition.

[0008] Therefore, there is an urgent need in this field for a sludge specific resistance experimental device that can achieve automated operation and has high precision, high repeatability and high efficiency, so as to overcome the various drawbacks of relying on manual operation in the existing technology and better adapt to the increasingly higher environmental protection standards and scientific research needs. Summary of the Invention

[0009] The purpose of this application is to overcome the above-mentioned technical problems and provide an automatic sludge resistivity test device, which can realize the effect of automated detection of sludge resistivity test, effectively reduce human operation error, improve experimental accuracy and efficiency, ensure accurate and reliable experimental data, and provide stable and high-quality experimental data support for sludge treatment.

[0010] This application discloses an automatic resistivity testing device for sludge, specifically adopting the following scheme: An automatic sludge resistivity testing device includes: a platform frame with a filtration station; A sludge extraction mechanism is installed on the platform frame and includes a first connecting pipe and a first control valve installed on the first connecting pipe for conveying sludge to the filtration station. A sludge filtration mechanism includes a measuring cup, a filter element, a second control valve, a funnel, a vacuum generator, a third control valve, a drain pipe, and a filtrate detection sensor. The measuring cup is located below the outlet of the first connecting pipe and is used to receive sludge. The filter element is located below the measuring cup. The second control valve is located at the bottom of the measuring cup and is used to control the flow of sludge into the filter element. The funnel passes through the filtration station and is located below the filter element to receive filtrate. The vacuum generator is connected to the funnel and is used to generate negative pressure inside the funnel. The third control valve is located at the bottom of the funnel. The drain pipe is connected to the third control valve and is used to discharge filtrate when the third control valve is opened. The filtrate detection sensor is located on the connecting pipe between the funnel and the drain pipe and is used to detect the filtrate level at the bottom of the funnel and the vacuum filtration pressure. The electrical control box is electrically connected to the first control valve, the second control valve, the vacuum generator, the third control valve, and the filtrate detection sensor.

[0011] By adopting the above technical solutions, the platform frame provides support for the device and the foundation for the workstation setup; the sludge extraction mechanism can transport sludge to the filtration station, realizing automatic sludge transport; in the sludge filtration mechanism, the measuring cup accurately holds the sludge, the second control valve controls the sludge flow into the filter element, the vacuum generator produces negative pressure in the funnel to promote filtration, the third control valve controls the discharge of filtrate, and the filtrate detection sensor detects the filtrate level and vacuum filtration pressure in real time, ensuring the standardization of the filtration process and accurate data recording; the electrical control box coordinates the control of all components, realizing precise regulation, real-time monitoring and fault alarm of the entire experimental process, ensuring stable and orderly operation of the equipment, and realizing automated detection of sludge specific resistance experiments.

[0012] Optionally, it also includes a waste liquid tank, and the sludge filtration mechanism further includes an overflow pipe, one end of which is connected to the overflow port of the measuring cup, and the other end of which leads to the waste liquid tank.

[0013] By adopting the above technical solution, the overflow pipe can guide the sludge overflowing from the measuring cup into the waste liquid tank, avoiding pollution caused by sludge overflowing from the device, while ensuring the cleanliness of the surrounding environment of the experimental device, and the waste liquid tank collects the overflowing sludge for subsequent unified treatment.

[0014] Optionally, the end face of the filter element is provided with a sealing element for sealing with the top of the funnel during filtration.

[0015] By adopting the above technical solution, a sealing element is set on the end face of the filter element to seal with the top of the funnel, which can prevent the leakage of filtrate during sludge filtration, ensure the normal operation of the filtration experiment, and improve the accuracy and reliability of the experimental data.

[0016] Optionally, an automatic cleaning mechanism is also included; the platform frame is further provided with a cleaning station, and the cleaning station is provided with a cleaning support; the automatic cleaning mechanism includes a moving component and a cleaning component, the moving component is disposed on the platform frame, and is used to clamp and move the filter element, so that the filter element switches between the filtration station and the cleaning station, and can flip the filter element at the cleaning station to pour out the filter cake, and after pouring, the filter element abuts against the cleaning support; the cleaning component is disposed at the cleaning station and is used to rinse the filter element located at the cleaning station.

[0017] By adopting the above technical solution, the automatic sludge resistivity experimental device can realize automatic cleaning of the filter elements. The moving component enables the filter elements to switch between the filtration station and the cleaning station, and can also flip the filter elements at the cleaning station to tilt the filter cake and make it abut against the cleaning support; the cleaning component can rinse the filter elements at the cleaning station, avoiding the tediousness and error of manual cleaning, improving experimental efficiency and the degree of automation of the device, and ensuring the continuous conduct of experiments.

[0018] Optionally, the cleaning assembly includes an upper rinsing unit and a lower rinsing unit; the upper rinsing unit includes a liftable rinsing hood, a first cleaning valve, and a first cleaning pipe, the rinsing hood being used to cover the upper port of the filter element, the first cleaning pipe communicating with the rinsing hood, and the first cleaning valve being disposed on the first cleaning pipe for controlling rinsing water to enter the rinsing hood and rinse the filter element; the lower rinsing unit includes a second cleaning valve and a second cleaning pipe disposed towards the lower port of the filter element, the second cleaning valve being disposed on the second cleaning pipe for controlling rinsing water to enter and rinse the lower port of the filter element.

[0019] By adopting the above technical solution, the upper rinsing unit can cover the upper port of the filter element with a liftable rinsing cover, and use the first cleaning valve to control the rinsing water to enter the rinsing cover through the first cleaning pipe to rinse the filter element; the lower rinsing unit can control the rinsing water to enter the lower port of the filter element through the second cleaning pipe with the second cleaning valve, so as to effectively clean the upper and lower ports of the filter element, ensure the cleanliness of the filter element, and facilitate the subsequent experiments.

[0020] Optionally, the upper rinsing unit further includes an air blowing pipe connected to the rinsing hood for blowing air into the rinsing hood to dry the filter element after rinsing.

[0021] By adopting the above technical solution, the air blowing pipe is connected to the rinsing hood, which can blow air into the rinsing hood to dry the filter element after rinsing. This avoids the residual moisture in the filter element affecting subsequent sludge filtration experiments, ensures the dry state and good performance of the filter element, and thus improves the experimental accuracy and reliability of the automatic sludge resistivity test device.

[0022] Optionally, the waste liquid tank is located below the cleaning station to collect wastewater generated by the upper rinsing unit and the lower rinsing unit.

[0023] By adopting the above technical solution and placing the waste liquid tank below the cleaning station, the wastewater generated by the upper and lower rinsing units can be effectively collected, avoiding pollution caused by indiscriminate discharge of wastewater, ensuring the cleanliness of the experimental environment, and providing good environmental conditions for the stable operation of the sludge automatic resistivity experimental device.

[0024] Optionally, the moving component includes: a linear drive unit arranged along the arrangement direction of the filtration station and the cleaning station; a lifting drive unit connected to the linear drive unit; a rotary drive unit connected to the lifting drive unit; and a clamping unit connected to the rotary drive unit for clamping the filter element.

[0025] By adopting the above technical solutions, the linear drive unit can move the filter element between the filtration station and the cleaning station to meet the position requirements of different working stages; the lifting drive unit can adjust the height of the filter element, which is convenient for cooperation with other components; the rotary drive unit can flip the filter element and tilt the filter cake; the clamping unit can stably clamp the filter element, ensuring that each drive unit drives the filter element to move accurately, realizing the switching of the filter element between the filtration station and the cleaning station, the tilting of the filter cake and the contact with the cleaning support, etc., providing conditions for automatic cleaning of the filter element, thereby improving the automation level and working efficiency of the automatic sludge resistivity test device.

[0026] Optionally, an automatic paper feeding mechanism is also included, comprising: a filter paper bin for stacking multiple layers of filter paper; and a paper dispensing assembly for separating and conveying a single sheet of filter paper from the filter paper bin. The paper dispensing assembly includes a pair of friction wheels rotating in opposite directions, the pair of friction wheels being disposed at the paper outlet of the filter paper bin. The pair of friction wheels, through the frictional force generated by their opposite rotation, pick up and convey a single sheet of filter paper from the filter paper bin to cover the filter element for filtering the filtrate of the sludge conveyed by the measuring cup.

[0027] By adopting the above technical solution, the filter paper bin of the automatic paper feeding mechanism can stack multiple layers of filter paper to meet the needs of multiple experiments; a pair of opposing rotating friction wheels of the paper output component can use friction to separate and transport a single sheet of filter paper from the paper output port of the filter paper bin, and cover it into the filter element, realizing the automation of filter paper laying, replacing manual paper feeding operation, providing a compliant filter paper laying foundation for the accurate and orderly conduct of sludge specific resistance experiments, and making the paper feeding process more automated and standardized.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. The platform frame provides support for the device and the foundation for the workstation setup; the sludge extraction mechanism can transport sludge to the filtration station, realizing automatic sludge transport; in the sludge filtration mechanism, the measuring cup accurately holds the sludge, the second control valve controls the sludge flow into the filter element, the vacuum generator produces negative pressure in the funnel to promote filtration, the third control valve controls the discharge of filtrate, and the filtrate detection sensor detects the filtrate level and vacuum filtration pressure in real time, ensuring the standardization of the filtration process and accurate data recording; the electrical control box coordinates the control of all components, realizing precise regulation, real-time monitoring and fault alarm of the entire experimental process, ensuring stable and orderly operation of the equipment, and realizing automated detection of sludge specific resistance test; 2. The overflow pipe can guide the sludge overflowing from the measuring cup into the waste liquid tank, avoiding sludge overflow from the device and causing pollution, while ensuring the cleanliness of the surrounding environment of the experimental device. The waste liquid tank collects the overflowing sludge for subsequent unified treatment. A sealing element is set on the end face of the filter element to seal with the top of the funnel, which can prevent the filtrate from leaking during the sludge filtration process, ensure the normal operation of the filtration experiment, and improve the accuracy and reliability of the experimental data. 3. The automatic sludge resistivity test device can realize automatic cleaning of filter elements. The moving component can switch the filter elements between the filtration station and the cleaning station. It can also flip the filter elements at the cleaning station to tilt the filter cake and make it abut against the cleaning support. The cleaning component can rinse the filter elements at the cleaning station, avoiding the tediousness and error of manual cleaning, improving experimental efficiency and the degree of automation of the device, and ensuring the continuous operation of the experiment. 4. The upper rinsing unit can cover the upper port of the filter element with a liftable rinsing cover, and use the first cleaning valve to control the rinsing water to enter the rinsing cover through the first cleaning pipe to rinse the filter element; the lower rinsing unit can control the rinsing water to enter the lower port of the filter element through the second cleaning pipe with the second cleaning valve, so as to effectively clean the upper and lower ports of the filter element, ensure the cleanliness of the filter element, and facilitate the subsequent experiments. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural schematic diagram of an automatic sludge resistivity testing device disclosed in an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of a sludge automatic resistivity experimental device without a platform frame is disclosed. Figure 3 for Figure 1 A schematic diagram of a sludge automatic resistivity experimental device without a platform frame is disclosed. Figure 4 for Figure 1 A schematic diagram of part of the structure of an automatic sludge resistivity experimental device disclosed in the publication; Figure 5 for Figure 2 A schematic diagram of the cross-sectional structure of an automatic sludge resistivity experimental device without the platform frame is disclosed. Figure 6 for Figure 1 A partial structural schematic diagram of an automatic sludge resistivity experimental device is disclosed. Figure 7 for Figure 1 A partial structural schematic diagram of an automatic sludge resistivity experimental device is disclosed. Figure 8 for Figure 1 A schematic diagram of the automatic paper feeding mechanism in an automatic sludge specific resistance experimental device is disclosed.

[0030] Explanation of reference numerals in the attached figures: 10. Platform frame; 11. Filtration station; 12. Cleaning station; 121. Cleaning support; 20. Sludge extraction mechanism; 21. First connecting pipe; 22. First control valve; 30. Sludge filtration mechanism; 31. Measuring cup; 32. Filter element; 321. Seal; 33. Second control valve; 34. Funnel; 35. Vacuum generator; 36. Third control valve; 37. Drain pipe; 38. Filtrate detection sensor; 39. Overflow pipe; 40. Electrical control box; 50. Waste liquid tank; 60. Automatic cleaning mechanism; 61. Moving component; 611. Linear drive unit; 612. Lifting drive unit; 613. Rotary drive unit; 614. Clamping unit; 62. Cleaning assembly; 621. Upper rinsing unit; 6211. Rinsing hood; 6212. First cleaning valve; 6213. First cleaning pipe; 622. Lower rinsing unit; 6221. Second cleaning valve; 6222. Second cleaning pipe; 70. Automatic paper feeding mechanism; 71. Filter paper compartment; 72. Paper output assembly; 721. Friction wheel. Detailed Implementation

[0031] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this application refers to and includes any or all possible combinations of one or more of the listed items.

[0032] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0033] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0034] See Figure 1 , Figure 2 and Figure 3 The present application discloses an automatic sludge specific resistance test device, which includes a platform frame 10, a sludge extraction mechanism 20, a sludge filtration mechanism 30, an electrical control box 40, a waste liquid tank 50, an automatic cleaning mechanism 60, and an automatic paper feeding mechanism 70.

[0035] The platform frame 10 is equipped with a filtration station 11 and a cleaning station 12. The filtration station 11 is used to filter sludge, and the cleaning station 12 is used to clean the filter elements. A sludge extraction mechanism 20 is mounted on the platform frame 10, and the sludge filtration mechanism 30 works in conjunction with the sludge extraction mechanism 20 to filter sludge. An electrical control box 40 is electrically connected to the sludge extraction mechanism 20, the sludge filtration mechanism 30, the automatic cleaning mechanism 60, and the automatic paper-laying mechanism 70, and is used to control the entire device. A waste liquid tank 50 is used to collect filtrate and cleaning waste liquid. The automatic cleaning mechanism 60 is used to clean the filter elements 32, preparing them for the next experiment. The automatic paper-laying mechanism 70 is used to automatically lay the filter paper. Thus, by controlling the automated actions of each mechanism through the electrical control box 40, the sludge resistivity experiment is automated, improving the accuracy, efficiency, and throughput of the experiment.

[0036] Specifically, the platform frame 10 is the supporting structure of the entire device. It adopts a metal frame structure, which has good stability and load-bearing capacity. The shape and size of the platform frame 10 can be designed according to actual needs, as long as it can reasonably arrange various mechanisms and components, and are not limited here.

[0037] The sludge extraction mechanism 20 includes a first connecting pipe 21 and a first control valve 22 disposed on the first connecting pipe 21. The first connecting pipe 21 can be made of corrosion-resistant plastic or metal, such as PVC pipe or stainless steel pipe, to ensure that the sludge is not corroded during transportation. The first control valve 22 is a solenoid valve, which is controlled to open and close by an electrical control box 40, thereby controlling the transportation of sludge. When the first control valve 22 is open, the sludge is transported to the filtration station 11 through the first connecting pipe 21; when the first control valve 22 is closed, the sludge transportation stops.

[0038] See Figure 3 , Figure 4 and Figure 5 The sludge filtration mechanism 30 includes a measuring cup 31, a filter element 32, a second control valve 33, a funnel 34, a vacuum generator 35, a third control valve 36, a drain pipe 37, a filtrate detection sensor 38, and an overflow pipe 39. The measuring cup 31 is located below the outlet of the first connecting pipe 21 and is used to receive sludge. The measuring cup 31 is made of transparent glass or plastic for easy observation of the sludge volume. The shape of the measuring cup 31 is, for example, cylindrical, and its capacity can be designed to a suitable size according to experimental needs, such as 100 ml.

[0039] The filter element 32 is located below the measuring cup 31 and has filter holes inside. In this embodiment, filter paper is used as the filter medium to cover the filter holes and filter the filtrate. Different specifications of qualitative filter paper can be used to meet the filtration requirements of different sludge. The size of the filter element 32 matches the measuring cup 31 and the funnel 34 to ensure that the sludge can pass smoothly through the filter element 32 for filtration. Sealing elements 321 are fitted on both the upper and lower end faces of the filter element 32. If the sealing element 321 is a rubber sealing ring, its shape matches the contact surface of the filter element 32, the funnel 34, and the cleaning support 121 (see below). It is used to seal with the top of the funnel 34 during filtration and with the top of the cleaning support 121 during cleaning. The rubber sealing ring has good elasticity and sealing performance, which can effectively prevent filtrate leakage and improve filtration efficiency.

[0040] The second control valve 33 is located at the bottom of the measuring cup 31 and can be an electromagnetic valve. Its opening and closing are controlled by the electrical control box 40, thereby controlling the flow of sludge into the filter element 32. A funnel 34 is inserted through the filtration station 11 and located below the filter element 32 to receive the filtrate. The funnel 34 is conical in shape, with a pipe at the bottom for discharging the filtrate. A vacuum generator 35 is connected to the funnel 34 to generate negative pressure within the funnel 34. If a vacuum pump is used, it can extract air from the funnel 34, creating a negative pressure environment, allowing the sludge to pass through the filter element 32 under negative pressure. The third control valve 36 is located at the bottom of the funnel 34 and can also be an electromagnetic valve to control the discharge of the filtrate. A drain pipe 37 is connected to the third control valve 36 and is used to discharge the filtrate when the third control valve 36 is open. The drain pipe 37 can be made of plastic or rubber.

[0041] A filtrate detection sensor 38 is located on the connecting pipe between the funnel 34 and the drain pipe 37. It can employ a pressure sensor and a level sensor to detect the filtrate level at the bottom of the funnel 34 and the vacuum filtration pressure in real time. The sensor converts the pressure signal into an electrical signal and transmits it to the control box 40, providing reliable numerical data for pressure monitoring during the filtration process, determination of the experimental endpoint, and accurate data recording. One end of the overflow pipe 39 is connected to the overflow port of the measuring cup 31, and the other end leads to the waste liquid tank 50. When the amount of sludge in the measuring cup 31 exceeds its capacity, the excess sludge will flow into the waste liquid tank 50 through the overflow pipe 39, preventing sludge overflow and pollution.

[0042] The electrical control box 40 is electrically connected to the first control valve 22, the second control valve 33, the vacuum generator 35, the third control valve 36, and the filtrate detection sensor 38. The electrical control box 40 integrates a PLC, servo driver, various modules, and electrical components to comprehensively control the automated actions of all mechanical structures on the platform and the data acquisition from sensors. This enables precise control, real-time monitoring, and fault alarms throughout the entire experimental process, ensuring stable and orderly equipment operation. For example, when the filtrate detection sensor 38 detects that the pressure or liquid level in the funnel 34 has reached a set value, the electrical control box 40 will control the corresponding valves to open or close, and monitor the vacuum pump's operating status according to a preset program.

[0043] See Figure 3 , Figure 5 and Figure 6 The automatic cleaning mechanism 60 includes a moving component 61 and a cleaning component 62. The moving component 61, mounted on the platform frame 10, clamps and moves the filter element 32, allowing it to switch between the filtration station 11 and the cleaning station 12. At the cleaning station 12, the moving component 61 can flip the filter element 32 to empty the filter cake, and after emptying, it places the filter element 32 against the cleaning support 121. The cleaning component 62, located at the cleaning station 12, is used to rinse the filter element 32 located at the cleaning station 12.

[0044] See also Figure 7 The moving component 61 includes a linear drive unit 611, a lifting drive unit 612, a rotary drive unit 613, and a clamping unit 614. The linear drive unit 611 is arranged along the orientation of the filtration station 11 and the cleaning station 12, and uses a linear module to achieve linear motion. The lifting drive unit 612 is connected to the linear drive unit 611 and uses a cylinder to achieve lifting motion. The rotary drive unit 613 is connected to the lifting drive unit 612 and uses a motor to drive a rotating shaft to flip the filter element 32. The clamping unit 614 is connected to the rotary drive unit 613 and is used to clamp the filter element 32 using a gripper mechanism.

[0045] The cleaning assembly 62 includes an upper rinsing unit 621 and a lower rinsing unit 622. The upper rinsing unit 621 includes a liftable rinsing hood 6211, a first cleaning valve 6212, a first cleaning pipe 6213, and an air blowing pipe. The rinsing hood 6211 is used to cover the upper port of the filter element 32. The first cleaning pipe 6213 connects to the rinsing hood 6211. The first cleaning valve 6212 is a solenoid valve located on the first cleaning pipe 6213, used to control the entry of rinsing water into the rinsing hood 6211 to rinse the filter element 32. The air blowing pipe connects to the rinsing hood 6211 (not shown in the figure) and is used to blow air into the rinsing hood 6211 to dry the filter element 32 after rinsing. The lower rinsing unit 622 includes a second cleaning valve 6221 and a second cleaning pipe 6222 facing the lower port of the filter element 32. The second cleaning valve 6221 is a solenoid valve located on the second cleaning pipe 6222, used to control the entry of rinsing water into the lower port of the filter element 32. Waste liquid tank 50 is located below the cleaning station 12 and is used to collect wastewater generated by the upper rinsing unit 621 and the lower rinsing unit 622.

[0046] See Figure 1 and Figure 8 The automatic paper feeding mechanism 70 includes a filter paper bin 71 and a paper dispensing assembly 72. The filter paper bin 71 can be made of plastic or metal and is used to stack multiple layers of filter paper. The paper dispensing assembly 72 includes a pair of friction wheels 721 rotating in opposite directions. The pair of friction wheels 721 are located at the paper outlet of the filter paper bin 71. The friction generated by the opposite rotation of the pair of friction wheels 721 picks up and conveys a single sheet of filter paper from the filter paper bin 71 to cover the filter element 32 for filtering the filtrate from the sludge conveyed by the measuring cup 31. The friction wheels 721 can be made of rubber, which has good friction and can accurately separate and convey a single sheet of filter paper.

[0047] The implementation principle of this embodiment is as follows: The electrical control box 40 automatically controls each mechanism to achieve operations such as sludge extraction, filtration, filtrate discharge, filter element 32 cleaning, and filter paper laying. The sludge extraction mechanism 20 delivers sludge to the measuring cup 31. After the measuring cup 31 receives a certain amount of sludge, the second control valve 33 opens, and the sludge is filtered through the filter element 32, with the filtrate entering the funnel 34. The vacuum generator 35 generates negative pressure within the funnel 34, accelerating the filtration process. The filtrate detection sensor 38 monitors the pressure and liquid level within the funnel 34 in real time, and the electrical control box 40 controls the operation of each valve and the vacuum pump based on the detection data. When there is excessive sludge in the measuring cup 31, the overflow pipe 39 discharges the excess sludge into the waste liquid tank 50, ensuring that a measured amount of sludge flows into the funnel 34. After filtration, the moving component 61 moves the filter element 32 to the cleaning station 12, tilts and tilts the filter cake, and brings it against the cleaning support 121. Then, the cleaning component 62 rinses and dries the filter element 32. The automatic paper-laying mechanism 70 automatically lays the filter paper before each experiment. The entire process reduces manual operation, improves the accuracy and efficiency of the experiment, and enables continuous detection, meeting the needs of large-scale experiments. Compared with traditional manual experimental methods, it has significant advantages, solving problems such as large errors in manual operation, cumbersome processes, limited data capture capabilities, and low throughput. It can also effectively collect waste liquid, automatically clean the filter element 32, and automatically lay the filter paper.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic resistivity testing device for sludge, characterized in that, include: The platform frame (10) is equipped with a filtration station (11). The sludge extraction mechanism (20) is installed on the platform frame (10) and includes a first connecting pipe (21) and a first control valve (22) installed on the first connecting pipe (21) for conveying sludge to the filtration station (11); The sludge filtration mechanism (30) includes a measuring cup (31), a filter element (32), a second control valve (33), a funnel (34), a vacuum generator (35), a third control valve (36), a drain pipe (37), and a filtrate detection sensor (38). The measuring cup (31) is located below the outlet of the first connecting pipe (21) and is used to receive sludge. The filter element (32) is located below the measuring cup (31). The second control valve (33) is located at the bottom of the measuring cup (31) and is used to control the flow of sludge into the filter element (32). The funnel (34) passes through the filtration station. 11), and located below the filter element (32) to receive the filtrate; the vacuum generator (35) is connected to the funnel (34) to generate negative pressure in the funnel (34); the third control valve (36) is located at the bottom of the funnel (34); the drain pipe (37) is connected to the third control valve (36) to discharge the filtrate when the third control valve (36) is opened; the filtrate detection sensor (38) is located on the connecting pipe between the funnel (34) and the drain pipe (37) to detect the filtrate level at the bottom of the funnel (34) and the vacuum filtration pressure; The electrical control box (40) is electrically connected to the first control valve (22), the second control valve (33), the vacuum generator (35), the third control valve (36), and the filtrate detection sensor (38).

2. The automatic sludge resistivity testing device according to claim 1, characterized in that, It also includes waste liquid tanks (50); The sludge filtration mechanism (30) also includes an overflow pipe (39), one end of which is connected to the overflow port of the measuring cup (31), and the other end is connected to the waste liquid tank (50).

3. The automatic sludge resistivity testing device according to claim 1, characterized in that, The end face of the filter element (32) is provided with a sealing element (321) for sealing with the top of the funnel (34) during filtration.

4. The automatic sludge resistivity testing device according to any one of claims 1-3, characterized in that, It also includes an automatic cleaning mechanism (60); The platform frame (10) is also provided with a cleaning station (12), and the cleaning station (12) is provided with a cleaning bracket (121). The automatic cleaning mechanism (60) includes a moving component (61) and a cleaning component (62). The moving component (61) is mounted on the platform frame (10) and is used to clamp and move the filter element (32) so that the filter element (32) can switch between the filtration station (11) and the cleaning station (12). It can also flip the filter element (32) at the cleaning station (12) to pour out the filter cake and then place the filter element (32) against the cleaning bracket (121) after pouring. The cleaning component (62) is mounted at the cleaning station (12) and is used to rinse the filter element (32) located at the cleaning station (12).

5. The automatic sludge resistivity testing device according to claim 4, characterized in that, The cleaning assembly (62) includes an upper rinsing unit (621) and a lower rinsing unit (622). The upper rinsing unit (621) includes a liftable rinsing cover (6211), a first cleaning valve (6212), and a first cleaning pipe (6213). The rinsing cover (6211) is used to cover the upper port of the filter element (32). The first cleaning pipe (6213) is connected to the rinsing cover (6211). The first cleaning valve (6212) is located on the first cleaning pipe (6213) and is used to control the rinsing water to enter the rinsing cover (6211) to rinse the filter element (32). The lower rinsing unit (622) includes a second rinsing valve (6221) and a second rinsing pipe (6222) disposed toward the lower port of the filter element (32). The second rinsing valve (6221) is disposed in the second rinsing pipe (6222) and is used to control the rinsing water to enter and rinse the lower port of the filter element (32).

6. The automatic sludge resistivity testing device according to claim 5, characterized in that, The upper rinsing unit (621) also includes an air blowing pipe connected to the rinsing hood (6211) for blowing air into the rinsing hood (6211) to dry the filter element (32) after rinsing.

7. The automatic sludge resistivity testing device according to claim 5, characterized in that, The waste liquid tank (50) is located below the cleaning station (12) and is used to collect the wastewater generated by the upper rinsing unit (621) and the lower rinsing unit (622).

8. The automatic sludge resistivity testing device according to claim 5, characterized in that, The moving component (61) includes: A linear drive unit (611) is arranged along the arrangement direction of the filtration station (11) and the cleaning station (12); The lifting drive unit (612) is connected to the linear drive unit (611). A rotary drive unit (613) is connected to the lifting drive unit (612). The clamping part (614) is connected to the rotary drive part (613) and is used to clamp the filter element (32).

9. The automatic sludge resistivity testing device according to claim 1, characterized in that, It also includes an automatic paper feeding mechanism (70), which includes: Filter paper compartment (71) is used to stack multiple layers of filter paper; Paper output assembly (72) for separating and conveying single sheets of filter paper from the filter paper bin (71); The paper output assembly (72) includes a pair of friction wheels (721) rotating in opposite directions. The pair of friction wheels (721) are located at the paper output port of the filter paper chamber (71). The pair of friction wheels (721) pick up and convey a single sheet of filter paper from the filter paper chamber (71) and forward through the friction generated by the opposite rotation, so as to cover the filter element (32) for filtering the filtrate of the sludge conveyed by the measuring cup (31).

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