Ultralow-density magnetic liquid level meter

Abstract

The invention discloses an ultralow-density magnetic liquid level meter, and belongs to the technical field of liquid level meters, the ultralow-density magnetic liquid level meter comprises a measuring cylinder, the measuring cylinder is communicated with an upper pipeline and a lower pipeline, a measuring box is fixedly mounted on the measuring cylinder, a magnetic turning plate is arranged in the measuring box, and a magnetic floater matched with the magnetic turning plate is arranged in the measuring cylinder; an adjusting assembly for adjusting the buoyancy of the magnetic floater is arranged on the measuring cylinder; the adjusting assembly comprises an adjusting box fixedly installed on the measuring cylinder, a rotating rod extending into the measuring cylinder is rotationally installed on the adjusting box, and a first connecting rope connected with the magnetic floater is wound around the rotating rod. According to the scheme, by arranging the balancing weight, a user can adjust the weight of the balancing weight according to needs, and therefore the buoyancy of the magnetic floater can be adjusted, in liquid with different concentrations, the magnetic floater can drive the magnetic turning plate to display accurate readings, and the effect of improving the accuracy of the liquid level meter is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid level gauges, and more specifically, to an ultra-low density magnetic liquid level gauge. Background Art

[0002] An ultra-low density magnetic liquid level gauge is a device specifically designed to measure the liquid level of extremely low density liquids (usually with a density less than 0.7 g / cm³), and is mainly used for measuring the liquid level of light liquids in industries such as petrochemical, pharmaceutical, and food processing; the commonly used magnetic liquid level gauge at present is a magnetic flap liquid level gauge based on the buoyancy principle and magnetic coupling effect.

[0003] When the magnetic flap liquid level gauge is actually used, different types of raw materials are often added to the liquid storage cylinder, and the densities of different raw materials are different. However, the prior art is not convenient for adjusting the buoyancy of the magnetic float, which is likely to affect the accuracy of the magnetic flap display.

[0004] In view of the above problems, some solutions have also been given in the prior art. For example, the Chinese invention patent with the publication number CN118583254A discloses a magnetic flap liquid level gauge for chemical measurement. This device adjusts the position of the pulling rope to drive the counterweight ring to move; relying on the counterweight ring, the buoyancy of the magnetic float can be indirectly adjusted to match the density of different chemical raw materials, ensuring that the rising height of the magnetic float is within a specific range, so as to ensure the accuracy of the magnetic flap display in the flap box after the magnetic float moves; however, the counterweight and the pulling rope in the prior art are exposed to the outside, and are easily affected by external factors. For example, rainwater and stains falling on the counterweight will affect the accuracy of the liquid level gauge. Even when the wind is strong, it will affect the pulling force of the counterweight on the magnetic float and cause a large floating range of the magnetic float, seriously affecting the accuracy of the liquid level gauge. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an ultra-low density magnetic liquid level gauge, which can achieve the purpose of improving the accuracy of the liquid level gauge.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] An ultra-low density magnetic liquid level gauge, comprising a measuring cylinder, an upper pipeline and a lower pipeline are connected to the measuring cylinder, a measuring box is fixedly installed on the measuring cylinder, a magnetic flap is arranged in the measuring box, and a magnetic float matched with the magnetic flap is arranged in the measuring cylinder, and an adjusting assembly for adjusting the buoyancy of the magnetic float is arranged on the measuring cylinder; The adjusting assembly includes an adjusting box fixedly installed on the measuring cylinder. A rotating rod extending into the measuring cylinder is rotatably installed on the adjusting box. A first connecting rope connected to the magnetic float is wound around the rotating rod. A guiding rod is rotatably installed in the adjusting box. A second connecting rope is wound around the rotating rod, and a counterweight block is fixedly installed at one end of the second connecting rope away from the rotating rod.

[0008] Further, a filter screen is installed in the lower pipeline. One end of the rotating rod away from the adjusting box extends into the lower pipeline. A cleaning plate is fixedly installed at one end of the rotating rod located in the lower pipeline, and the cleaning plate is in contact with the filter screen.

[0009] Further, the side wall of the filter screen away from the measuring cylinder is an inclined surface. A collection box is provided on the lower pipeline. A collection port communicating with the collection box is opened on the lower pipeline, and a blocking assembly for blocking the collection port is provided on the lower pipeline.

[0010] Further, the blocking assembly includes an installation groove opened on the lower pipeline. A blocking plate is slidably installed in the installation groove. A sewage discharge port communicating with the collection port is opened on the blocking plate. An elastic air bag is jointly installed between the blocking plate and the installation groove. A communication port communicating with the outside is opened on the installation groove. A push plate is slidably installed on the lower pipeline. A connecting block is fixedly installed on the push plate, and the connecting block is fixedly connected to the blocking plate through the communication port.

[0011] Further, a fixing block is fixedly installed on the collection box. A connecting groove slidably matched with the fixing block is opened on the lower pipeline. A fixing hole is opened on the fixing block. A horizontal groove is opened on the blocking plate, and a fixing rod matched with the fixing hole is installed in the horizontal groove.

[0012] Further, a sealing assembly matched with the collection box is provided on the lower pipeline. The sealing assembly includes a sealing gasket installed on the lower pipeline. A sealing cavity is opened on the sealing gasket. An air pipe is inserted into the sealing cavity. A communication assembly is provided on the lower pipeline, and the air pipe is communicated with the sealing cavity through the communication assembly.

[0013] Further, the communication assembly includes a linkage groove opened on the lower pipeline. A horizontal rod extending into the elastic air bag is horizontally slidably installed in the linkage groove. A spring is jointly installed between the horizontal rod and the linkage groove. A communication hole communicating with the air pipe is opened on the horizontal rod. An air inlet valve with an input end communicated with the air pipe is inserted into the elastic air bag.

[0014] Further, friction stripes are provided on the push plate.

[0015] Further, an adjusting opening is opened on the adjusting box, and an adjusting plate is detachably installed in the adjusting opening.

[0016] Further, one end of the fixing rod close to the fixing hole is a conical surface.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In this solution, by setting the counterweight, the user can adjust the weight of the counterweight according to needs, so as to adjust the buoyancy of the magnetic float, so that in liquids with different concentrations, the magnetic float can drive the magnetic turning plate to display accurate readings, which plays a role in improving the accuracy of the liquid level gauge; (2) In this solution, by setting the filter screen, the liquid entering the measuring cylinder can be filtered, so as to prevent impurities from entering the measuring cylinder and affecting the liquid level gauge reading. And during the movement of the magnetic float, it can also drive the rotating rod to rotate, and during the rotation of the rotating rod, the impurities on the filter screen can be cleaned, avoiding the blockage of the filter screen and affecting the liquid level gauge reading, and further improving the accuracy of the liquid level gauge; (3) In this solution, by setting the collection box, during the process of the rotating rod driving the cleaning plate to clean the impurities on the filter screen, the impurities will enter the collection box under the action of centrifugal force, thus preventing the impurities from adhering to the filter screen again and affecting the liquid level gauge reading. At the same time, the setting of the sealing plate enables the impurities in the collection box to be cleaned under the normal working condition of the liquid level gauge. And after the installation of the collection box, the sealing plate drives the fixing rod to fix the collection box, and the air flow in the elastic airbag will also cause the sealing gasket to expand, improving the airtightness of the collection box, and further improving the accuracy of the liquid level gauge. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a cross-sectional view of the measuring cylinder and the lower pipeline of the present invention; Figure 3 is the present invention Figure 2 The enlarged view at A in; Figure 4 is the present invention Figure 3 The enlarged view at B in; Figure 5 is the present invention Figure 3 The enlarged view at C in; Figure 6 is a combined view of the adjustment box, the counterweight, the second connecting rope and the rotating rod of the present invention; Figure 7 is a cross-sectional view of the sealing gasket of the present invention; Figure 8 is a combined view of the push plate and the friction lines of the present invention.

[0019] Explanation of the reference numerals in the drawings: 1. Measuring cylinder; 2. Upper pipeline; 3. Lower pipeline; 4. Magnetic turning plate; 5. Magnetic float; 6. Adjusting assembly; 601. Adjusting box; 602. Rotating rod; 603. First connecting rope; 604. Guide rod; 605. Second connecting rope; 606. Counterweight block; 701. Filter screen; 702. Cleaning plate; 703. Collection box; 704. Collection port; 8. Sealing plugging assembly; 801. Sealing plate; 802. Sewage outlet; 803. Elastic airbag; 804. Communication port; 805. Pushing plate; 806. Connecting block; 807. Fixed block; 808. Fixed rod; 9. Sealing assembly; 901. Sealing gasket; 902. Sealing cavity; 903. Air pipe; 904. Communication assembly; 9041. Horizontal rod; 9042. Spring; 9043. Communication hole; 9044. Intake valve; 10. Friction pattern; 11. Adjusting plate; 12. Measuring box. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 to 8 , an ultra-low density magnetic liquid level gauge, including a measuring cylinder 1, an upper pipe 2 and a lower pipe 3 are connected to the measuring cylinder 1, a measuring box 12 is fixedly installed on the measuring cylinder 1, a magnetic flap 4 is arranged in the measuring box 12, and a magnetic float 5 cooperating with the magnetic flap 4 is arranged in the measuring cylinder 1, and an adjusting assembly 6 for adjusting the buoyancy of the magnetic float 5 is arranged on the measuring cylinder 1; The adjusting assembly 6 includes an adjusting box 601 fixedly installed on the measuring cylinder 1, a rotating rod 602 rotatably installed on the adjusting box 601 and extending into the measuring cylinder 1, a first connecting rope 603 wound around the rotating rod 602 and connected to the magnetic float 5, a guide rod 604 rotatably installed in the adjusting box 601, a second connecting rope 605 wound around the rotating rod 602, and a counterweight block 606 fixedly installed at one end of the second connecting rope 605 away from the rotating rod 602.

[0022] During use, as the liquid enters the measuring cylinder 1 through the lower pipeline 3, the magnetic float 5 moves upward under the action of buoyancy. Then, the magnet inside the magnetic float 5 generates magnetic coupling with the external moving magnetic flap 4 and drives the magnetic flap 4 to flip. Usually, the moving magnetic flap 4 is two-color, such as red and white, and the liquid level height is indicated at the red-white interface. From the buoyancy formula F_float = G_drain, that is, the buoyancy force an object receives is equal to the gravity of the liquid displaced by the object when it is in a stable state, the derived formula is F_float = G_drain = ρ_liquid gV_drain (ρ_liquid is the density of the liquid, and V_drain represents the volume of the displaced liquid). Since the magnetic float 5 floats on the liquid surface, and the first connecting rope 603 wound around the rotating rod 602 is fixedly connected to the magnetic float 5. At the same time, the second connecting rope 605 connected to the counterweight 606 is also wound around the rotating rod 602, and the winding directions of the first connecting rope 603 and the second connecting rope 605 are opposite. That is, at this time, the magnetic float 5 and the counterweight 606 respectively apply reverse forces to the rotating rod 602 through the first connecting rope 603 and the second connecting rope 605. Therefore, the buoyancy force received by the magnetic float 5 at this time is equal to the gravity of the magnetic float 5 minus the gravity of the counterweight 606. When the liquid density increases, since the buoyancy force remains unchanged, the volume of the displaced liquid becomes smaller at this time. So the magnetic float 5 will move upward, resulting in an overestimated display of the magnetic flap 4. To improve the accuracy of the display of the magnetic flap 4, the user can remove an appropriate amount of the counterweight 606 according to the liquid density. And to prevent the loss of the counterweight 606, the user can place the removed counterweight 606 on the inner bottom wall of the adjustment box 601. At this time, the buoyancy force received by the counterweight 606 becomes larger, so the volume of the displaced liquid becomes larger. Then the magnetic float 5 moves downward to reset, so that the magnetic flap 4 displays normally, playing a role in improving the accuracy of the liquid level gauge.

[0023] As Figure 2 , Figure 3 As shown in the figure, a filter screen 701 is installed in the lower pipeline 3. One end of the rotating rod 602 away from the adjustment box 601 extends into the lower pipeline 3. A cleaning plate 702 is fixedly installed at the end of the rotating rod 602 located in the lower pipeline 3, and the cleaning plate 702 is in contact with the filter screen 701.

[0024] The side wall of the filter screen 701 away from the measuring cylinder 1 is an inclined surface. A collection box 703 is provided on the lower pipeline 3. A collection port 704 communicating with the collection box 703 is opened on the lower pipeline 3. And a plugging assembly 8 is provided on the lower pipeline 3 for plugging the collection port 704.

[0025] By adopting the above technical solution, when the liquid enters the measuring tube through the lower pipeline 3, the filter screen 701 can block impurities in the liquid, thereby preventing the impurities from entering the measuring tube and adhering to the surface of the magnetic float 5, which affects the accuracy of the liquid level gauge. When the liquid level rises, the magnetic float 5 will move upward along the measuring cylinder 1, and during the upward movement of the magnetic float 5, the rotating rod 602 will be driven to rotate through the first connecting rope 603. At this time, the second connecting rope 605 will be wound around the rotating rod 602 and drive the counterweight 606 to move upward. When the liquid level drops, the magnetic float 5 will move downward along the measuring cylinder 1. At this time, the counterweight 606 will move downward and drive the rotating rod 602 to reverse through the second connecting rope 605, and during the reverse rotation of the rotating rod 602, the first connecting rope 603 will be wound around the rotating rod 602. Then, during the rotation of the rotating rod 602, the cleaning plate 702 can be driven to rotate, and during the rotation of the cleaning plate 702, the stains on the surface of the filter screen 701 can be cleaned, thereby preventing the stains from affecting the normal passage of the liquid through the filter screen 701 into the measuring cylinder 1 and causing the accuracy of the liquid level gauge to deteriorate, further improving the accuracy of the liquid level gauge.

[0026] By making the side wall of the filter screen 701 away from the measuring cylinder 1 be an inclined surface, during the process of the liquid driving the impurities through the filter screen 701, the liquid will drive the impurities to move along the inclined surface of the filter screen 701 towards the edge position of the filter screen 701, thereby further preventing the filter screen 701 from being blocked. At the same time, during the rotation of the cleaning plate 702, the stains on the surface of the filter screen 701 will be driven to rotate and move the stains towards the edge of the filter screen 701. Then, when the stains pass through the collection port 704, under the action of centrifugal force, the stains enter the collection box 703 through the collection port 704, thereby effectively preventing the stains from blocking the filter screen 701 and affecting the accuracy of the liquid level gauge, and further improving the accuracy of the liquid level gauge.

[0027] As Figure 3 、 Figure 4 、 Figure 5 shown, the plugging assembly 8 includes a mounting groove opened on the lower pipeline 3, a plugging plate 801 is slidably mounted in the mounting groove, a sewage discharge port 802 communicated with the collection port 704 is opened on the plugging plate 801, and an elastic airbag 803 is jointly installed between the plugging plate 801 and the mounting groove. A communication port 804 communicated with the outside is opened on the mounting groove, a push plate 805 is slidably mounted on the lower pipeline 3, and a connecting block 806 is fixedly installed on the push plate 805, and the connecting block 806 is fixedly connected with the plugging plate 801 through the communication port 804.

[0028] A fixing block 807 is fixedly installed on the collection box 703. A connecting groove that slidably cooperates with the fixing block 807 is formed on the lower pipeline 3. A fixing hole is formed in the fixing block 807. A horizontal groove is formed in the plugging plate 801, and a fixing rod 808 that cooperates with the fixing hole is installed in the horizontal groove.

[0029] By adopting the above technical solution, when there is too much dirt in the collection box 703, the excess dirt may adhere to the surface of the filter screen 701, affecting the permeability and resulting in poor accuracy of the liquid level gauge. Therefore, it is necessary to clean the dirt in the collection box 703. The user can first push the push plate 805 to move. During the movement of the push plate 805, the plugging plate 801 is driven to move through the connecting block 806. At this time, the elastic airbag 803 is stretched and has a tendency to recover. And during the movement of the plugging plate 801, the sewage outlet 802 is gradually separated from the collection port 704 and the collection port 704 is plugged. At the same time, during the movement of the plugging plate 801, the fixing rod 808 is driven to move, and during the movement of the fixing rod 808, it is gradually separated from the fixing hole. Then the user can remove the collection box 703 for cleaning and reinstall the new collection box 703 on the lower pipeline 3. After the installation of the collection box 703 is completed, the user can release the push plate 805. Then the elastic airbag 803 contracts and drives the plugging plate 801 to reset. And during the reset process of the plugging plate 801, the fixing rod 808 is driven to insert into the fixing hole again, thereby fixing the collection box 703 again, effectively avoiding the influence of the collection box 703 on the accuracy of the liquid level gauge during the dirt cleaning process and further improving the accuracy of the liquid level gauge.

[0030] As Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 As shown in

[0031] A sealing assembly 9 that cooperates with the collection box 703 is provided on the lower pipeline 3. The sealing assembly 9 includes a sealing gasket 901 installed on the lower pipeline 3. A sealing cavity 902 is formed in the sealing gasket 901. An air pipe 903 is inserted into the sealing cavity 902. A communicating component 904 is provided on the lower pipeline 3, and the air pipe 903 is communicated with the sealing cavity 902 through the communicating component 904.

[0032] By adopting the above technical solution, during the process of the elastic airbag 803 contracting and driving the plugging plate 801 to reset, the air flow in the elastic airbag 803 is compressed and has a tendency to flow to the outside. And during the process of the plugging plate 801 resetting, it gradually contacts the horizontal rod 9041 and applies a thrust to the horizontal rod 9041. Then, under the action of the thrust, the horizontal rod 9041 moves along the linkage groove and compresses the spring 9042. And after the fixing rod 808 is inserted into the fixing hole, the horizontal rod 9041 drives the communication hole 9043 to communicate with the air pipe 903. At this time, the air flow in the elastic airbag 803 flows into the sealing cavity 902 through the communication hole 9043 and the air pipe 903. Then, under the action of the air flow, the sealing gasket 901 expands and fits tightly with the collection box 703, thereby preventing liquid from leaking through the gap between the collection box 703 and the lower pipeline 3, and improving the stability of the device.

[0033] When the user stretches the elastic airbag 803 through the push plate 805, the connecting block 806, and the plugging plate 801, the elastic airbag 803 inhales air from the sealing cavity 902 through the air inlet valve 9044 and the air pipe 903, and makes the sealing gasket 901 contract and reset, so as to facilitate the installation of the collection box 703.

[0034] As Figure 8 shown, the push plate 805 is provided with friction lines 10.

[0035] By adopting the above technical solution, when the user pushes the push plate 805, by setting the friction lines 10, the roughness of the surface of the push plate 805 can be increased, preventing the user from slipping when pushing the push plate 805, and playing a role in facilitating the user to push the push plate 805.

[0036] As Figure 1 、 Figure 4 shown, the adjustment box 601 is provided with an adjustment opening, and an adjustment plate 11 is detachably installed in the adjustment opening.

[0037] One end of the fixing rod 808 close to the fixing hole is a conical surface.

[0038] By adopting the above technical solution, when the user needs to add or subtract the counterweight 606, the user can first remove the adjustment plate 11, and then add or subtract the counterweight 606. After the addition or subtraction of the counterweight 606 is completed, the user can install the adjustment plate 11 in the adjustment opening again, thereby preventing external factors from affecting the adjustment effect of the counterweight 606.

[0039] By making one end of the fixing rod 808 close to the fixing hole be a conical surface, when the fixing rod 808 is inserted into the fixing hole, the initial contact area between the fixing rod 808 and the fixing hole can be reduced, thereby facilitating the insertion of the fixing rod 808 into the fixing hole.

[0040] Usage method: When the liquid density increases, since the buoyancy remains unchanged, the volume of the displaced liquid becomes smaller at this time, so the magnetic float 5 will move upward, resulting in a larger display of the magnetic flap 4. To improve the accuracy of the display of the magnetic flap 4, the user can remove an appropriate amount of counterweight 606 according to the liquid density. And to avoid the loss of the counterweight 606, the user can place the removed counterweight 606 on the inner bottom wall of the adjustment box 601. At this time, the buoyancy received by the counterweight 606 becomes larger, so the volume of the displaced liquid becomes larger, and then the magnetic float 5 resets downward, so that the magnetic flap 4 displays normally; when the liquid enters the measuring tube through the lower pipe 3, the filter screen 701 can block the impurities in the liquid, thus preventing the impurities from entering the measuring tube and adhering to the surface of the magnetic float 5, affecting the accuracy of the liquid level gauge. When the liquid level rises, the magnetic float 5 will move upward along the measuring cylinder 1, and during the upward movement of the magnetic float 5, it will drive the rotating rod 602 to rotate through the first connecting rope 603. At this time, the second connecting rope 605 is wound around the rotating rod 602 and drives the counterweight 606 to move upward. When the liquid level drops, the magnetic float 5 will move downward along the measuring cylinder 1. At this time, the counterweight 606 moves downward and drives the rotating rod 602 to reverse through the second connecting rope 605, and during the reverse rotation of the rotating rod 602, the first connecting rope 603 is wound around the rotating rod 602. Then, during the rotation of the rotating rod 602, it can drive the cleaning plate 702 to rotate, and during the rotation of the cleaning plate 702, it can clean the stains on the surface of the filter screen 701; when the liquid drives the impurities through the filter screen 701, the liquid will drive the impurities to move along the inclined surface of the filter screen 701 to the edge position of the filter screen 701, thus further preventing the filter screen 701 from being blocked. At the same time, during the rotation of the cleaning plate 702, it will drive the stains on the surface of the filter screen 701 to rotate and make the stains move towards the edge of the filter screen 701. Then, when the stains pass through the collection port 704, under the action of centrifugal force, the stains enter the collection box 703 through the collection port 704; during the process of the elastic airbag 803 contracting and driving the plugging plate 801 to reset, the air flow in the elastic airbag 803 is compressed and has a tendency to flow to the outside. And during the process of the plugging plate 801 resetting, it gradually contacts the horizontal rod 9041 and applies a thrust to the horizontal rod 9041. Then, under the action of the thrust, the horizontal rod 9041 moves along the linkage groove and compresses the spring 9042. And after the fixed rod 808 is inserted into the fixing hole, the horizontal rod 9041 drives the communication hole 9043 to communicate with the air pipe 903. At this time, the air flow in the elastic airbag 803 flows into the sealing cavity 902 through the communication hole 9043 and the air pipe 903. Then, under the action of the air flow, the sealing gasket 901 expands and fits tightly with the collection box 703, thus preventing the liquid from leaking through the gap between the collection box 703 and the lower pipe 3.

[0041] As described above, it is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An ultra-low density magnetic liquid level gauge, comprising a measuring cylinder (1), an upper pipeline (2) and a lower pipeline (3) are communicated with the measuring cylinder (1), a measuring box (12) is fixedly installed on the measuring cylinder (1), a magnetic flap (4) is arranged in the measuring box (12), and a magnetic float (5) matched with the magnetic flap (4) is arranged in the measuring cylinder (1), and an adjusting assembly (6) for adjusting the buoyancy of the magnetic float (5) is arranged on the measuring cylinder (1); It is characterized in that: The adjusting assembly (6) includes an adjusting box (601) fixedly installed on the measuring cylinder (1), a rotating rod (602) extending into the measuring cylinder (1) is rotatably installed on the adjusting box (601), a first connecting rope (603) connected with the magnetic float (5) is wound on the rotating rod (602), a guiding rod (604) is rotatably installed in the adjusting box (601), a second connecting rope (605) is wound on the rotating rod (602), and a counterweight block (606) is fixedly installed at one end of the second connecting rope (605) far away from the rotating rod (602).

2. The ultra-low density magnetic level gauge according to claim 1, wherein: A filter screen (701) is installed in the lower pipeline (3), one end of the rotating rod (602) far away from the adjusting box (601) extends into the lower pipeline (3), a cleaning plate (702) is fixedly installed at one end of the rotating rod (602) located in the lower pipeline (3), and the cleaning plate (702) is attached to the filter screen (701).

3. The ultra-low density magnetic liquid level gauge according to claim 2, wherein: The side wall of the filter screen (701) away from the measuring cylinder (1) is an inclined surface, a collecting box (703) is arranged on the lower pipeline (3), a collecting port (704) communicated with the collecting box (703) is opened on the lower pipeline (3), and a blocking assembly (8) for blocking the collecting port (704) is arranged on the lower pipeline (3).

4. The ultra-low density magnetic liquid level gauge according to claim 3, characterized in that: The blocking assembly (8) includes an installation groove opened on the lower pipeline (3), a blocking plate (801) is slidably installed in the installation groove, a sewage discharge port (802) communicated with the collecting port (704) is opened on the blocking plate (801), an elastic air bag (803) is jointly installed between the blocking plate (801) and the installation groove, a communication port (804) communicated with the outside is opened on the installation groove, a push plate (805) is slidably installed on the lower pipeline (3), a connecting block (806) is fixedly installed on the push plate (805), and the connecting block (806) is fixedly connected with the blocking plate (801) through the communication port (804).

5. An ultra-low density magnetic liquid level gauge according to claim 4, characterized in that: A fixing block (807) is fixedly installed on the collecting box (703), a connecting groove slidably matched with the fixing block (807) is opened on the lower pipeline (3), a fixing hole is opened on the fixing block (807), a horizontal groove is opened on the blocking plate (801), and a fixing rod (808) matched with the fixing hole is installed in the horizontal groove.

6. An ultra-low density magnetic liquid level gauge according to claim 5, characterized in that: A sealing assembly (9) cooperating with the collection box (703) is provided on the lower pipeline (3). The sealing assembly (9) includes a gasket (901) installed on the lower pipeline (3). A sealing cavity (902) is formed in the gasket (901). An air pipe (903) is inserted into the sealing cavity (902). A connecting component (904) is provided on the lower pipeline (3), and the air pipe (903) is communicated with the sealing cavity (902) through the connecting component (904).

7. An ultra-low density magnetic liquid level gauge according to claim 6, characterized in that: The connecting component (904) includes a linkage groove formed in the lower pipeline (3). A horizontal rod (9041) extending into the elastic airbag (803) is horizontally and slidably installed in the linkage groove. A spring (9042) is jointly installed between the horizontal rod (9041) and the linkage groove. A communication hole (9043) communicated with the air pipe (903) is formed in the horizontal rod (9041). An air inlet valve (9044) with an input end communicated with the air pipe (903) is inserted into the elastic airbag (803).

8. An ultra-low density magnetic liquid level gauge according to claim 4, characterized in that: Friction stripes (10) are provided on the push plate (805).

9. An ultra-low density magnetic liquid level gauge according to claim 1, characterized in that: An adjustment opening is formed in the adjustment box (601), and an adjustment plate (11) is detachably installed in the adjustment opening.

10. An ultra-low density magnetic level gauge according to claim 5, characterized in that: One end of the fixing rod (808) close to the fixing hole is a conical surface.

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