Anti-clogging water content meter

Abstract

The utility model belongs to water content meter technical field especially a kind of anti-blocking type water content meter, including water content meter body and the flange being installed on water content meter body, the outer surface of the flange is provided with cleaning device, the cleaning device includes lifting screw rod and flexible ceramic scraping ring, the lifting of lifting screw rod drives the lifting of flexible ceramic scraping ring and the outer surface of the probe of water content meter body is cleaned.This anti-blocking type water content meter, by setting cleaning device, the impurities adhered to the outer surface of the probe of water content meter can be removed, the rotation of worm wheel can drive lifting screw rod to lift, the lifting of lifting screw rod can drive sleeve ring to lift, then drive flexible ceramic scraping ring to scrape the oil stain adhered to the outer surface of probe, physically strip adhered soft dirt, complete cleaning to the probe of water content meter body, seal sleeve seals lifting screw rod, prevent the dust adhered to the outer surface of lifting screw rod from entering the pipeline installed.

Description

Technical Field

[0001] This utility model relates to the field of moisture content meter technology, and in particular to an anti-clogging moisture content meter. Background Technology

[0002] In industries such as petroleum, chemical, and food, real-time online monitoring of the water content in liquids is crucial. Currently, most widely used online water content meters are based on principles such as microwave, capacitance, and radio frequency, and measure the water content by sensing changes in the dielectric constant of the medium through sensors.

[0003] However, existing online moisture meters have a common and serious drawback in practical applications: their sensor probes must be in direct contact with the measured medium. Impurities such as wax, asphalt, solid particles, and sludge in the medium are very easy to adhere to or deposit on the probe surface, causing the probe to "scale" or "clog". This not only causes a sharp drop in measurement accuracy and slow response, but in severe cases, it can even cause complete failure, requiring shutdown, disassembly, and manual cleaning. This greatly affects the continuity and automation level of the production process, and increases maintenance costs and safety risks. Utility Model Content

[0004] Addressing the technical problem that existing moisture content meters suffer from probe surface fouling due to the adhesion of medium, leading to "scaling" or "clogging," resulting in a sharp decrease in measurement accuracy and slow response, requiring manual cleaning and disassembly, this invention proposes an anti-clogging moisture content meter.

[0005] This utility model proposes an anti-clogging water content meter, which includes a water content meter body and a flange installed on the water content meter body. The outer surface of the flange is provided with a cleaning device, which includes a lifting screw and a flexible ceramic scraper ring. The lifting screw drives the flexible ceramic scraper ring to rise and fall, and then cleans the outer surface of the probe of the water content meter body.

[0006] The cleaning device is equipped with an oil-absorbing device, which includes an absorbent sponge that absorbs liquid adhering to the outer surface of the lifting screw.

[0007] Preferably, the cleaning device further includes a cleaning housing, which is fixedly installed on the upper surface of the flange. A micro motor is fixedly installed on the outer surface of the flange. A worm gear is fixedly installed at one end of the output shaft of the micro motor. One end of the worm gear is rotatably connected to the upper surface of the flange through a bearing seat. A support frame is fixedly installed on the upper surface of the flange. A worm wheel is rotatably connected to the upper surface of the support frame through a bearing. The worm wheel meshes with the worm gear.

[0008] The above technical solution facilitates the maintenance of the cleaning device by disassembling the outer casing. By controlling the start of the micro motor, the rotation of the worm gear drives the worm wheel to rotate. The micro motor can be controlled by a button or started at a timer. This is existing technology, thus enabling automatic cleaning.

[0009] Preferably, the inner wall of the worm gear is threadedly connected to the outer surface of the lifting screw, the outer surface of the lifting screw is slidably inserted into the inner wall of the support frame, a sealing sleeve is fixedly installed at one end of the lifting screw, and one end of the sealing sleeve is fixedly installed to the upper surface of the cleaning shell.

[0010] The above technical solution uses the rotation of the worm gear to drive the lifting screw to move up and down, thus cleaning the probe of the moisture meter. The sealing sleeve seals the lifting screw to prevent dust adhering to the outer surface of the lifting screw from entering the installed pipeline.

[0011] Preferably, a collar is fixedly installed at the bottom end of the lifting screw, the inner wall of the collar is fixedly installed with the outer surface of the flexible ceramic scraper ring, and the outer surface of the flexible ceramic scraper ring is in contact with the outer surface of the probe of the moisture meter body.

[0012] The above technical solution utilizes a lifting screw to raise and lower a collar, which in turn drives a flexible ceramic scraper ring to scrape away oil and dirt adhering to the outer surface of the probe. This physically removes the soft dirt, resulting in excellent wear resistance and an extremely long lifespan. The fit between the flexible ceramic scraper ring and the sensor probe does not decrease over time, ensuring continuous and effective cleaning throughout the entire equipment's lifespan. This reduces the frequency of downtime for replacing spare parts and maintenance costs. During the scraping process, it causes minimal wear to the sensor probe surface (usually metal or with a special coating), producing almost no scratches and perfectly protecting the precision measurement surface. The low coefficient of friction also means that sticky substances such as sludge and wax are unlikely to adhere to the scraper ring itself. This avoids the flexible ceramic scraper ring becoming a new source of contamination and ensures cleaning efficiency with each scraping. The "flexible" here does not refer to the softness of the material, but rather that the flexible ceramic scraper ring is designed with a certain degree of elasticity or flexible structure (such as using a special ceramic coating or composite material structure), rather than a single piece of rigid ceramic. This allows it to adapt to the surface and make the flexible ceramic scraper ring undergo slight deformation under certain pressure, thus better adapting to the slight unevenness or shape tolerance of the sensor probe surface. This ensures that there are no dead corners in the scraping, and the cleaning is more thorough. It also provides a buffer protection effect. The flexibility provides a slight buffering effect, and even if larger particles are stuck, it can avoid hard scratches to the probe or the scraper ring itself to a certain extent.

[0013] Preferably, the oil suction device further includes an oil suction tank, which is fixedly installed on the upper surface of the flange. A return spring is fixedly installed on the inner wall of the oil suction tank, and a support ring is fixedly installed at one end of the return spring. The lower surface of the support ring is slidably inserted into the inner wall of the oil suction tank through a column.

[0014] The above technical solution allows for the storage of liquid after cleaning the liquid adhering to the surface of the lifting screw. An oil suction tank is used to store the liquid. The tank can be disassembled and removed after cleaning the outer casing to empty the liquid. When the cleanliness requirements of the medium being transported in the pipeline are not high, and filtration is required later, through holes can be opened in the oil suction tank to allow the collected liquid to re-enter the connected pipeline through the flange. A return spring facilitates the reset of the support ring, thereby resetting the adsorbent sponge.

[0015] Preferably, the upper surface of the support ring is fixedly installed with the lower surface of the absorbent sponge, the outer surface of the absorbent sponge is in contact with the outer surface of the lifting screw, the inner surface of the absorbent sponge is provided with a tapered groove, and a spring scraper is fixedly installed on the outer surface of the support ring, with one end of the spring scraper slidably inserted into the inner wall of the groove of the lifting screw.

[0016] Through the above technical solution, by making contact between the adsorption sponge and the surface of the lifting screw, the liquid adhering to the surface of the lifting screw can be adsorbed as the lifting screw rises and falls. The surface of the lifting screw is specially treated and coated with Teflon coating to reduce liquid adhesion and facilitate cleaning. The spring scraper can remove the grooves of the lifting screw to reduce liquid residue.

[0017] Preferably, a pressing frame is fixedly installed on the outer surface of the absorbent sponge, the outer surface of the pressing frame is slidably inserted into the outer surface of the column of the oil absorption tank, and a push rod is fixedly installed at the top of the lifting screw, with one end of the push rod contacting one end of the pressing frame.

[0018] Through the above technical solution, in order to clean the adsorbent sponge, after the lifting screw descends, the push rod of the lifting screw can press the pressing frame, so that the pressing frame presses the adsorbent sponge. After the adsorbent sponge descends and enters the oil absorption tank, by pressing the adsorbent sponge, the adsorbent sponge will squeeze the adsorbed liquid into the oil absorption tank. The conical groove on the adsorbent sponge can facilitate the expansion when the adsorbent sponge descends.

[0019] The beneficial effects of this utility model are as follows: 1. By installing a cleaning device, impurities adhering to the outer surface of the probe of the moisture meter can be removed. The rotation of the worm gear drives the lifting screw to rise and fall. The rising and falling of the lifting screw drives the collar to rise and fall, which in turn drives the flexible ceramic scraper ring to scrape the oil stains adhering to the outer surface of the probe, physically peeling off the soft dirt adhering to it, thus completing the cleaning of the moisture meter probe. The sealing sleeve seals the lifting screw to prevent dust adhering to the outer surface of the lifting screw from entering the installed pipeline. This solves the technical problem of existing moisture meter probes where the medium adheres to its surface, causing "scaling" or "clogging" of the probe, resulting in a sharp drop in measurement accuracy, slow response, and the need for shutdown and disassembly for manual cleaning.

[0020] 2. By setting up an oil suction device, liquid adhering to the surface of the lifting screw can be absorbed. Through the contact between the absorbent sponge and the surface of the lifting screw, the liquid adhering to the surface can be absorbed as the lifting screw rises and falls. The surface of the lifting screw is specially treated and coated with Teflon to reduce liquid adhesion and facilitate cleaning. The spring scraper can clean the grooves of the lifting screw to reduce liquid residue. In order to clean the absorbent sponge, after the lifting screw descends, the push rod of the lifting screw can press the pressing frame, which in turn presses the absorbent sponge. After the absorbent sponge descends and enters the oil suction tank, the press of the absorbent sponge will squeeze the absorbed liquid into the oil suction tank. The conical groove on the absorbent sponge can facilitate the expansion of the absorbent sponge as it descends. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an anti-clogging water content meter proposed in this utility model; Figure 2 This is a perspective view of the cleaning shell structure of an anti-clogging water content meter proposed in this utility model; Figure 3 This is a perspective view of the lifting screw structure of an anti-clogging water content meter proposed in this utility model; Figure 4 This is a perspective view of the worm gear structure of an anti-clogging water content meter proposed in this utility model; Figure 5 A diagram of a flexible ceramic scraper ring for an anti-clogging water content meter proposed in this utility model; Figure 6 This is a perspective view of the oil suction tank structure of an anti-clogging water content meter proposed in this utility model; Figure 7 This is a perspective view of the support ring structure of an anti-clogging water meter proposed in this utility model.

[0022] In the diagram: 1. Moisture meter body; 11. Flange; 2. Cleaning housing; 21. Micro motor; 22. Worm gear; 23. Support frame; 24. Worm wheel; 25. Lifting screw; 26. Sealing sleeve; 3. Collar; 31. Flexible ceramic scraper ring; 4. Oil suction tank; 41. Return spring; 42. Support ring; 43. Absorbent sponge; 44. Conical groove; 45. Spring scraper; 46. Pressing frame; 47. Push rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1-7 A clog-resistant moisture meter includes a moisture meter body 1 and a flange 11 installed on the moisture meter body 1. The outer surface of the flange 11 is provided with a cleaning device, which includes a lifting screw 25 and a flexible ceramic scraper ring 31. The lifting screw 25 drives the flexible ceramic scraper ring 31 to rise and fall, and then cleans the outer surface of the probe of the moisture meter body 1.

[0025] Specifically, to automatically clean the moisture meter probe, the cleaning device also includes a cleaning housing 2, which is fixedly installed on the upper surface of the flange 11. A micro motor 21, model Panasonic AMH24LN1B, is fixedly installed on the outer surface of the flange 11. The micro motor 21 can be manually controlled or started and stopped at a timer via a main controller and remote control components, which is existing technology. A worm gear 22 is fixedly installed at one end of the output shaft of the micro motor 21. One end of the worm gear 22 is rotatably connected to the upper surface of the flange 11 via a bearing seat. A support frame 23 is fixedly installed on the upper surface of the flange 11. A worm wheel 24 is rotatably connected to the upper surface of the support frame 23 via a bearing. The worm wheel 24 meshes with the worm gear 22. The cleaning housing 2 can be disassembled to facilitate maintenance of the cleaning device. By controlling the start of the micro motor 21, the rotation of the worm gear 22 drives the worm wheel 24 to rotate. The micro motor 21 can be controlled by a button or started at a timer, which is existing technology, thus enabling automatic cleaning.

[0026] Specifically, in order to drive the lifting screw 25 to rise and fall, the inner wall of the worm gear 24 is threadedly connected to the outer surface of the lifting screw 25, and the outer surface of the lifting screw 25 is slidably inserted into the inner wall of the support frame 23. In order to seal the lifting screw 25, a sealing sleeve 26 is fixedly installed at one end of the lifting screw 25, and one end of the sealing sleeve 26 is fixedly installed on the upper surface of the cleaning housing 2. The rotation of the worm gear 24 can drive the lifting screw 25 to rise and fall, thus cleaning the probe of the moisture meter body 1. The sealing sleeve 26 seals the lifting screw 25 to prevent dust adhering to the outer surface of the lifting screw 25 from entering the installed pipe.

[0027] Specifically, in order to clean the probe of the moisture meter body 1, a collar 3 is fixedly installed at the bottom end of the lifting screw 25. The inner wall of the collar 3 is fixedly installed with the outer surface of the flexible ceramic scraper ring 31, and the outer surface of the flexible ceramic scraper ring 31 is in contact with the outer surface of the probe of the moisture meter body 1.

[0028] The lifting screw 25 raises and lowers the collar 3, which in turn moves the flexible ceramic scraper ring 31 to scrape the oil and dirt adhering to the outer surface of the probe. This physically removes the soft dirt, resulting in excellent wear resistance and an extremely long lifespan. The fit between the flexible ceramic scraper ring 31 and the sensor probe does not decrease over time, ensuring continuous and effective cleaning throughout the entire equipment's lifespan. This reduces the frequency of downtime for spare parts replacement and maintenance costs. During the scraping process, it causes minimal wear to the sensor probe surface, which is typically metal or has a special coating, almost without scratches, perfectly protecting the precision measurement surface. The low coefficient of friction also means that sticky substances such as sludge and wax are less likely to adhere to the scraper ring itself, preventing damage to the flexible ceramic scraper ring. The flexible ceramic scraper ring 31 becomes a new source of contamination, ensuring cleaning efficiency with each scraping. Here, "flexible" does not refer to the softness of the material, but rather that the flexible ceramic scraper ring 31 is designed with a certain degree of elasticity or flexible structure, such as using a special ceramic coating or composite material structure, rather than a single piece of rigid ceramic. This allows it to adapt to the surface and make the flexible ceramic scraper ring 31 undergo slight deformation under certain pressure, thereby better adapting to the slight unevenness or shape tolerance of the sensor probe surface, ensuring that there are no dead corners in the scraping and that the cleaning is more thorough. It also provides a buffer protection effect. The flexibility provides a slight buffering effect, and even if larger particles are stuck, it can avoid hard scratches to the probe or the scraper ring itself to a certain extent.

[0029] By setting up a cleaning device, impurities adhering to the outer surface of the probe of the moisture meter can be removed. The rotation of the worm gear 24 drives the lifting screw 25 to rise and fall. The rising and falling of the lifting screw 25 drives the collar 3 to rise and fall, which in turn drives the flexible ceramic scraper ring 31 to scrape the oil stains adhering to the outer surface of the probe, physically peeling off the soft dirt adhering to it, thus completing the cleaning of the probe of the moisture meter body 1. The sealing sleeve 26 seals the lifting screw 25 to prevent dust adhering to the outer surface of the lifting screw 25 from entering the installed pipeline. This solves the technical problem that the medium in the existing moisture meter probe will adhere to its surface, causing the probe to "scale" or "block" and resulting in a sharp drop in measurement accuracy, slow response, and the need to stop the machine for disassembly and manual cleaning.

[0030] In order to clean the surface of the lifting screw 25, the cleaning device is equipped with an oil absorption device, which includes an absorbent sponge 43. The absorbent sponge 43 absorbs the liquid adhering to the outer surface of the lifting screw 25.

[0031] Specifically, in order to facilitate the repositioning of the absorbent sponge 43, the oil suction device also includes an oil suction tank 4. The oil suction tank 4 is fixedly installed on the upper surface of the flange 11. A reset spring 41 is fixedly installed on the inner wall of the oil suction tank 4. A support ring 42 is fixedly installed on one end of the reset spring 41. The lower surface of the support ring 42 is slidably inserted into the inner wall of the oil suction tank 4 through a column.

[0032] In order to store the liquid after cleaning the liquid adhering to the surface of the lifting screw 25, the liquid is stored in the oil suction tank 4. The oil suction tank 4 can be disassembled and removed after the cleaning shell 2 is removed to pour out the liquid. When the cleanliness requirement of the medium transported in the pipeline is not high, and filtration is required later, a through hole can be opened on the oil suction tank 4 so that the collected liquid can re-enter the pipeline connected to it through the flange 11. The return spring 41 facilitates the return of the support ring 42, thereby allowing the adsorption sponge 43 to return to its original position.

[0033] Specifically, in order to clean the lifting screw 25, the upper surface of the support ring 42 is fixedly installed with the lower surface of the adsorption sponge 43, the outer surface of the adsorption sponge 43 is in contact with the outer surface of the lifting screw 25, and the inner surface of the adsorption sponge 43 is provided with a conical groove 44. The conical groove 44 facilitates the deformation of the adsorption sponge 43 and reduces the expansion of the adsorption sponge 43 after being squeezed. A spring scraper 45 is fixedly installed on the outer surface of the support ring 42, and one end of the spring scraper 45 is slidably inserted into the inner wall of the groove of the lifting screw 25. This device is suitable for pipelines that need to be cleaned regularly or for media that will be filtered later.

[0034] By having the absorbent sponge 43 come into contact with the surface of the lifting screw 25, the liquid adhering to the surface of the lifting screw 25 can be absorbed as the lifting screw 25 rises and falls. The surface of the lifting screw 25 is specially treated and coated with Teflon coating to reduce liquid adhesion and facilitate cleaning. The spring scraper 45 can clean the grooves of the lifting screw 25 to reduce liquid residue.

[0035] Specifically, in order to compress the absorbent sponge 43, a pressing frame 46 is fixedly installed on the outer surface of the absorbent sponge 43. The outer surface of the pressing frame 46 is slidably inserted into the outer surface of the column of the oil absorption tank 4. A push rod 47 is fixedly installed at the top of the lifting screw 25. One end of the push rod 47 is in contact with one end of the pressing frame 46.

[0036] In order to clean the absorbent sponge 43, after the lifting screw 25 is lowered, the push rod 47 of the lifting screw 25 can press the pressing frame 46, so that the pressing frame 46 presses the absorbent sponge 43. After the absorbent sponge 43 is lowered and enters the oil absorption tank 4, by pressing the absorbent sponge 43, the absorbent sponge 43 will squeeze the absorbed liquid into the oil absorption tank 4. The conical groove 44 on the absorbent sponge 43 can facilitate the expansion of the absorbent sponge 43 when it is lowered.

[0037] By setting up an oil suction device, liquid adhering to the surface of the lifting screw 25 can be absorbed. Through the contact between the absorbent sponge 43 and the surface of the lifting screw 25, the liquid adhering to its surface can be absorbed as the lifting screw 25 rises and falls. The surface of the lifting screw 25 is specially treated and coated with Teflon coating to reduce liquid adhesion and facilitate cleaning. The spring scraper 45 can clean the grooves of the lifting screw 25 to reduce liquid residue. In order to clean the absorbent sponge 43, after the lifting screw 25 descends, the push rod 47 of the lifting screw 25 can press the pressing frame 46, so that the pressing frame 46 presses the absorbent sponge 43. After the absorbent sponge 43 descends and enters the oil suction tank 4, the press of the absorbent sponge 43 will squeeze the absorbed liquid into the oil suction tank 4. The conical groove 44 on the absorbent sponge 43 can facilitate the expansion of the absorbent sponge 43 when it descends.

[0038] Working principle: When cleaning is required for the pipeline conveying the medium and the probe of the moisture meter body 1, the pipeline is started by the micro motor 21 on the flange 11. The micro motor 21 drives the worm gear 22 to rotate, which in turn drives the meshing worm wheel 24 to rotate. The worm wheel 24 rotates on the support frame 23, and then drives the lifting screw 25 to descend. The descent of the lifting screw 25 causes the sealing sleeve 26 to fold. At the same time, the lifting screw 25 drives the collar 3 fixed at the bottom to descend, and the collar 3 drives the flexible ceramic scraper ring. 31 descends, and the flexible ceramic scraper ring 31 scrapes the outer surface of the probe of the water content meter body 1, so that the adhering material on the outer surface of the probe of the water content meter body 1 is scraped off and enters the pipe. The scraped-off adhering material is carried away with the clean water flow. The lifting screw 25 reverses and rises, and the lifting screw 25 drives the flexible ceramic scraper ring 31 to rise. The adsorption sponge 43 adsorbs the lifting screw 25 and absorbs the water marks adhering to the lifting screw 25. At the same time, the spring scraper 45 on the support ring 42 scrapes the inner wall of the groove of the lifting screw 25. When the lifting screw 25 descends, the push rod 47 on the lifting screw 25 presses the pressing frame 46. The pressing frame 46 pushes the adsorption sponge 43 and the spring scraper 45 to descend. After the support ring 42 descends, it squeezes the reset spring 41. The support ring 42 is limited by the oil suction tank 4 and cannot descend. The pressing frame 46 continues to press the adsorption sponge 43, so that the liquid squeezed by the adsorption sponge 43 enters the oil suction tank 4 and is collected.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A clog-resistant moisture meter, comprising a moisture meter body (1) and a flange (11) mounted on the moisture meter body (1), characterized in that: The outer surface of the flange (11) is provided with a cleaning device, which includes a lifting screw (25) and a flexible ceramic scraper ring (31). The lifting screw (25) drives the flexible ceramic scraper ring (31) to rise and fall, and then cleans the outer surface of the probe of the water content meter body (1). The cleaning device is equipped with an oil-absorbing device inside, which includes an absorbent sponge (43) to absorb the liquid adhering to the outer surface of the lifting screw (25).

2. The anti-clogging moisture meter according to claim 1, characterized in that: The cleaning device also includes a cleaning housing (2), which is fixedly installed on the upper surface of the flange (11). A micro motor (21) is fixedly installed on the outer surface of the flange (11). A worm gear (22) is fixedly installed at one end of the output shaft of the micro motor (21). One end of the worm gear (22) is rotatably connected to the upper surface of the flange (11) through a bearing seat. A support frame (23) is fixedly installed on the upper surface of the flange (11). A worm wheel (24) is rotatably connected to the upper surface of the support frame (23) through a bearing. The worm wheel (24) meshes with the worm gear (22).

3. The anti-clogging moisture meter according to claim 2, characterized in that: The inner wall of the worm gear (24) is threadedly connected to the outer surface of the lifting screw (25), the outer surface of the lifting screw (25) is slidably inserted into the inner wall of the support frame (23), and a sealing sleeve (26) is fixedly installed at one end of the lifting screw (25), and one end of the sealing sleeve (26) is fixedly installed on the upper surface of the cleaning shell (2).

4. The anti-clogging moisture meter according to claim 1, characterized in that: A collar (3) is fixedly installed at the bottom end of the lifting screw (25). The inner wall of the collar (3) is fixedly installed with the outer surface of the flexible ceramic scraper ring (31). The outer surface of the flexible ceramic scraper ring (31) is in contact with the outer surface of the probe of the water content meter body (1).

5. A clog-resistant moisture meter according to claim 1, characterized in that: The oil suction device also includes an oil suction tank (4), which is fixedly installed on the upper surface of the flange (11). A return spring (41) is fixedly installed on the inner wall of the oil suction tank (4), and a support ring (42) is fixedly installed on one end of the return spring (41). The lower surface of the support ring (42) is slidably inserted into the inner wall of the oil suction tank (4) through a column.

6. A clog-resistant moisture meter according to claim 5, characterized in that: The upper surface of the support ring (42) is fixedly installed with the lower surface of the adsorption sponge (43). The outer surface of the adsorption sponge (43) is in contact with the outer surface of the lifting screw (25). A tapered groove (44) is opened on the inner surface of the adsorption sponge (43). A spring scraper (45) is fixedly installed on the outer surface of the support ring (42). One end of the spring scraper (45) is slidably inserted into the inner wall of the groove of the lifting screw (25).

7. A clog-resistant moisture meter according to claim 5, characterized in that: A pressing frame (46) is fixedly installed on the outer surface of the absorbent sponge (43). The outer surface of the pressing frame (46) is slidably inserted into the outer surface of the column of the oil absorption tank (4). A push rod (47) is fixedly installed at the top of the lifting screw (25). One end of the push rod (47) is in contact with one end of the pressing frame (46).

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