Flap magnetic floater liquid level meter

Abstract

The invention discloses a turning plate magnetic floater liquid level meter, which relates to the technical field of liquid level meters and mainly structurally comprises a barrel body, a magnetic turning plate measuring part, a sleeve, a magnetic body, a guide rod, a floater, an air seal assembly, a top cover and the like. During working, liquid level changes drive the floater, the guide rod and the sleeve to ascend and descend, the linkage part is matched with the threads to weaken liquid level fluctuation influences, and the magnetic body triggers the magnetic turning plate measuring part to display the liquid level; harmful steam leakage is blocked through multiple sealing of the gas sealing assembly and inert gas protection, and if the liquid level exceeds the limit, the magnetic body triggers the alarm lamp to give an early warning. The problems that existing equipment is insufficient in measurement accuracy and poor in volatile harmful liquid sealing protection are solved, and the device is suitable for industrial production and chemical storage scenes and particularly suitable for liquid level monitoring of a volatile harmful liquid container. Compared with the prior art, measurement is more accurate and stable, protection is more reliable, and the service life is longer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid level meters, in particular to a flip plate magnetic float liquid level meter. BACKGROUND

[0002] In the field of industrial production and chemical storage, real-time and accurate monitoring of the liquid level in the container is a key link to ensure production safety, control process parameters, and avoid leakage or overflow of the medium. The flip plate magnetic float liquid level meter has become one of the commonly used devices for monitoring the liquid level of various containers due to its relatively simple structure, intuitive observation, and low maintenance cost. Its core working principle is based on the buoyancy drive and magnetic coupling effect, that is, the magnetic component is driven to move synchronously by the float in the container as the liquid level rises and falls, and then the external magnetic flip plate is triggered to flip, presenting the liquid level height in a visual way. Without direct contact with the medium in the container, the measurement can be realized to some extent, which meets the monitoring needs of some sealed and corrosive media.

[0003] However, the existing flip plate magnetic float liquid level meter still has many technical shortcomings in practical application, which is difficult to fully meet the requirements of accuracy, safety and stability under complex working conditions. In terms of liquid level measurement accuracy, the liquid surface is prone to fluctuation due to factors such as liquid stirring, in-out material impact, etc., which causes the float to deviate horizontally or tilt, and then drives the connected guide rod and magnetic carrier component to deviate from the vertical motion track, causing the magnetic component position deviation, resulting in the difference between the external flip plate reading and the actual liquid level. At the same time, most existing devices only have one set of magnetic flip plate measuring part on one side or in one direction, and local observation blind area is easy to appear when the liquid surface fluctuates, further reducing the reading accuracy. In addition, the magnetic carrier component of some devices lacks stable guide structure, which is easy to jam or tilt with the inner wall of the cylinder during lifting, aggravating the displacement transmission error and affecting the measurement accuracy.

[0004] In terms of adaptability to volatile harmful liquid containers, the sealing performance of the existing flip plate magnetic float liquid level meter has obvious shortcomings. The medium stored in such containers is easy to volatilize and produce harmful steam. The guide rod and the penetration part of the container top of the existing device are sealed by a single sealing ring, which is easy to fail due to wear and aging after long-term use, causing harmful steam to leak along the gap, not only polluting the operating environment and endangering the health of workers, but also possibly causing safety accidents due to the mixing of steam and air to form an explosive environment. At the same time, there is no effective inert gas protection mechanism to inhibit the volatilization speed of the medium, and it is also difficult to avoid the oxidation and deterioration of the medium caused by contact with air, affecting the quality and storage safety of the medium.

[0005] In summary, the existing flip-plate magnetic float level gauges have technical deficiencies in measurement accuracy and sealing protection against harmful media, which limit their application in complex working conditions, especially in monitoring the level of volatile and harmful liquid containers. It is urgent to solve the above problems and improve the overall performance of the equipment through structural optimization and technical improvement. Summary of the Invention

[0006] The purpose of this invention is to provide a flip-plate magnetic float level gauge. A guide rod drives a sleeve to move vertically along a threaded guide groove inside the cylinder. Simultaneously, the magnetic body inside the sleeve moves, causing multiple sets of magnetic flip-plate measuring sections around the cylinder to flip and display the liquid level directly. The rotational design of the connection between the guide rod and the sleeve, along with the threaded guide mechanism, reduces the impact of liquid level fluctuations on the reading. The gas sealing assembly, through multiple sealing structures, inert gas filling, and tight fixation to the container, prevents leakage of volatile and harmful liquid vapors, inhibits liquid evaporation, and avoids safety risks. Furthermore, when the liquid level exceeds the limit, an alarm light at the trigger point inside the time-sealed top cover will illuminate, achieving accurate measurement and safety monitoring.

[0007] To achieve the above objectives, the present invention provides the following technical solution: When the liquid level inside the container changes, the bottom float rises and falls vertically under the influence of buoyancy, and the displacement is transmitted to the sleeve inside the cylinder via the guide rod. During this process, the device employs a dual-structure design to protect against reading deviations caused by liquid level fluctuations: Firstly, the connection between the guide rod and the bottom of the sleeve uses a rotating connection design. When liquid level fluctuations cause the float to shift laterally, the guide rod can rotate slightly around the rotating hole, converting the lateral force into rotational displacement, preventing the fluctuations from directly causing the sleeve to tilt or shift. Secondly, the threads on the outer wall of the sleeve and the threaded guide groove on the inner wall of the cylinder form a sliding fit, providing a rigid vertical movement path for the sleeve, further restricting its movement trajectory, preventing tilting or jamming due to fluctuations, ensuring the sleeve moves smoothly only in the vertical direction, and guaranteeing the stability of displacement transmission.

[0008] Inside the sleeve, a magnetic body is fixed by the clamping arc surface between the upper and lower sleeves. As the sleeve rises and falls with the liquid level, the magnetic body moves synchronously. Two to three sets of magnetic flap measuring units are arrayed around the cylinder. These units capture the positional changes of the magnetic body in real time through magnetic field induction, causing the flaps to rise and fall with the magnetic body, thus visually displaying the liquid level height inside the container. At the same time, multiple arrayed measuring units can capture the position of the magnetic body from different angles, further reducing local observation blind spots caused by liquid surface fluctuations and improving reading accuracy.

[0009] The gas-sealing assembly consists of an upper pressure seal and a lower pressure seal. When tightened together, they form a gas-sealing cavity. A rubber ring, which fits tightly against the guide rod, is installed in the mounting groove at the through-hole. A clamping element within the gas-sealing cavity, in conjunction with a spring, applies continuous pressure to the upper and lower rubber rings, ensuring that the rubber rings remain tightly fitted to the guide rod during its movement and preventing harmful liquid vapors from leaking through the gap between the guide rod and the assembly. Simultaneously, a first gasket at the connection surface between the upper pressure seal and the sleeve, and a second gasket between the rubber ring and the spring in the lower pressure seal, further fill gaps at the various connection points of the assembly, enhancing the sealing effect. The bottom of the gas-sealing assembly is fixed to the top of the container via threads or a flange, preventing harmful vapors from leaking through the installation gap between the assembly and the container.

[0010] The air inlet pipe, which runs through the upper pressure seal, connects to an inert gas tank fixed to the sleeve side. Inert gas can be filled into the gas seal cavity to create a slightly positive pressure environment. This balances the pressure generated by the evaporation of harmful liquids inside the container, reducing the accelerated evaporation of liquids due to pressure differences. It also isolates air from harmful liquids, preventing the liquids from reacting and deteriorating with air, and preventing harmful vapors from mixing with air to form a flammable and explosive environment. The exhaust pipe can periodically discharge a small amount of residual harmful vapors in the cavity. Combined with the closing cap, this controls gas flow and further reduces the risk of leakage.

[0011] When the liquid level reaches the preset height, the sleeve drives the magnetic body to trigger the preset trigger point of the alarm light inside the top cover of the cylinder, illuminating the alarm light and providing an over-limit warning. Throughout the process, the various components form a stable, accurate, and safe liquid level measurement mechanism through mechanical structure limiting, magnetic induction transmission, fluctuation protection, and special control of hazardous media. This mechanism is particularly suitable for liquid level monitoring in special working conditions such as containers for volatile and hazardous liquids.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. Improve the accuracy and stability of liquid level measurement. Through the sliding fit between the outer wall thread of the sleeve and the inner wall thread of the cylinder, combined with the rotational connection design of the guide rod and the sleeve connection, the movement of the sleeve can be restricted to the vertical direction only. This effectively reduces the sleeve tilting, jamming or displacement deviation caused by liquid surface fluctuations, ensuring that the displacement of the magnetic body corresponds accurately to the actual liquid level change. On the other hand, the array of 2-3 sets of magnetic flap measuring parts on the periphery of the cylinder can eliminate the blind zone of a single observation direction, further improving the accuracy of liquid level readings.

[0013] 2. Enhance the safety and media stability of containers containing volatile and hazardous liquids. The gas seal assembly constructs multiple seals, which prevent the leakage of hazardous liquid vapors from various gaps by tightly sealing the rubber ring with the guide rod, pressing the rubber ring with a spring, filling the gaps with a gasket, and fixing the assembly to the container with threads. Inert gas is filled into the gas seal cavity to form a slight positive pressure, which can reduce the accelerated evaporation of liquid due to pressure difference and isolate air to avoid liquid deterioration and safety risks caused by the mixing of hazardous vapors with air, adapting to special working conditions.

[0014] 3. Ensure long-term reliable operation of the device. The threaded guide structure can distribute the pressure of the sleeve and magnetic body weight on the guide rod and connecting parts, reducing mechanical wear between components. The sealing and inertial protection design of the gas seal assembly can also prevent harmful media from corroding the guide rod, connecting parts and other moving parts, extending the overall service life of the device. At the same time, the liquid level over-limit alarm function can provide timely warnings, further improving the safety of use. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a flip-plate magnetic float level gauge according to the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the sleeve of the flip-plate magnetic float level gauge according to the present invention; Figure 3 This is a cross-sectional view of the cylinder of a flip-plate magnetic float level gauge according to the present invention; Figure 4 This is a three-dimensional structural diagram of a flap magnetic float level gauge air seal assembly according to the present invention; Figure 5 This is an exploded view of the three-dimensional structure of an air seal assembly for a flip-plate magnetic float level gauge according to the present invention. Figure 6 This is a cross-sectional view of a flap magnetic float level gauge air seal assembly according to the present invention; In the diagram, 1. Cylinder; 2. Magnetic flap measuring part; 3. Sleeve; 4. Magnetic body; 5. Guide rod; 6. Float; 7. Air seal assembly; 8. Top cover; 11. Threaded guide groove; 31. Thread; 32. Connecting part; 33. Upper sleeve; 34. Lower sleeve; 35. Clamping arc surface; 71. Upper pressure seal; 72. Lower pressure seal; 73. Air seal cavity; 74. Rubber ring; 75. Clamping part; 76. Spring; 77. First washer; 78. Second washer; 81. Air inlet pipe; 82. Air outlet pipe; 83. Inert gas tank; 84. Closing cap; 85. Alarm light. Detailed Implementation

[0016] The technical solutions of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] like Figures 1-6 As shown, a flip-plate magnetic float level gauge includes a cylinder 1 located at the top of a container, and a magnetic flip-plate measuring part 2 is provided on the side of the cylinder 1. The cylinder 1 is characterized in that a threaded guide groove 11 is formed on the inner wall of the cylinder 1, and a sleeve 3 is installed inside the cylinder 1. The outer wall of the sleeve 3 is provided with a thread 31 corresponding to the threaded guide groove 11. The sleeve 3 is slidably installed inside the cylinder 1 through the engagement of the thread 31 and the threaded guide groove 11. A magnetic body 4 is installed inside the sleeve 3, and the bottom of the sleeve 3 is rotatably connected to the guide rod 5 through the connecting part 32. A float 6 is installed at the bottom of the guide rod 5. The bottom of the sleeve 3 is equipped with an air-sealing assembly 7, and the bottom of the air-sealing assembly 7 is fixedly installed to the top of the container. The guide rod 5 passes through the air-sealing assembly 7.

[0018] The air-sealing assembly 7 includes an upper pressure sealing member 71 fixedly installed at the bottom of the cylinder 1 and a lower pressure sealing member 72 fixedly installed below the upper pressure sealing member 71. The bottom of the lower pressure sealing member 72 is fixedly installed to the top of the container. When the upper pressure sealing member 71 and the lower pressure sealing member 72 are tightly closed, an air-sealing cavity 73 is formed in the middle. The air-sealing cavity 73 extends upward into the cylinder 1 and downward into the container. The upper pressure seal 71 and the lower pressure seal 72 are both recessed at the through-hole to form an installation groove. A rubber ring 74 is installed in the installation groove, and the inner diameter of the rubber ring 74 is set to fit tightly with the guide rod 5. A clamping member 75 is provided in the air-sealed cavity 73, and a spring 76 is fitted on the clamping member 75. The upper side of the clamping member 75 presses against the rubber ring 74 in the upper sealing member 71, and the bottom of the spring 76 presses against the rubber ring 74 in the lower sealing member 72.

[0019] The upper pressure seal 71 is connected to the sleeve 3 with a first washer 77, and the lower pressure seal 72 is connected to the rubber ring 74 with a second washer 78 between the spring 76 and the spring 72. The bottom of the spring 76 presses against the second washer 78 and presses the rubber ring 74 in the lower pressure seal 72.

[0020] An air inlet pipe 81 and an air outlet pipe 82 are provided through the upper pressure seal 71. The air inlet pipe 81 and the air outlet pipe 82 are connected to the air seal cavity 73. The air inlet pipe 81 is connected to the inert gas tank 83, and the air outlet pipe 82 is provided with a closing cap 84 at the outlet end.

[0021] The inert gas tank 83 is fixedly installed on the side of the sleeve 3.

[0022] The sleeve 3 includes an upper sleeve 33 and a lower sleeve 34. The upper sleeve 33 and the lower sleeve 34 are provided with a clamping arc surface 35 for attaching to the magnetic body 4 when they are in contact. When the upper sleeve 33 and the lower sleeve 34 are closed and fixed, the clamping arc surface 35 clamps and fixes the magnetic body 4.

[0023] The bottom of the sleeve 3 is rotatably connected to the guide rod 5 through the connecting part 32. The connecting part 32 consists of several connecting plates extending from the bottom periphery of the sleeve 3 toward the center, and the connecting plates have a rotating hole at the connection point of the center point, through which the guide rod 5 is rotatably connected.

[0024] The top of the cylinder 1 is detachably mounted with a top cover 8, and an alarm light 85 is provided on the top cover 8. The trigger point of the alarm light 85 is located inside the top cover 8.

[0025] The cylinder 1 is provided with a magnetic flip plate measuring part 2 on one side. The magnetic flip plate measuring part 2 is in groups of 2 or 3, and is arranged in an array around the cylinder 1.

[0026] The bottom of the air seal assembly 7 is fixedly installed to the top of the container by threads or flanges.

[0027] During operation, when the liquid level rises, the bottom float 6 moves upward under the buoyancy of the liquid, and the displacement is transmitted to the sleeve 3 inside the cylinder 1 through the rigid guide rod 5. If the liquid level drops, the float 6 moves downward synchronously with the liquid level, and the guide rod 5 drives the sleeve 3 to descend accordingly. During this process, the rotating connection structure between the guide rod 5 and the bottom connection part 32 of the sleeve 3 plays a role. The connection part 32 is composed of several connecting plates extending from the bottom of the sleeve 3 towards the center. The rotating hole at the center point of the connecting plate flexibly cooperates with the top of the guide rod 5. When the liquid level fluctuates due to factors such as stirring, feeding and discharging, the guide rod 5 can rotate slightly around the rotating hole, converting the lateral impact force on the float 6 into rotational displacement, avoiding the fluctuation from directly causing the sleeve 3 to tilt. At the same time, the thread 31 on the outer wall of the sleeve 3 and the threaded guide groove 11 on the inner wall of the cylinder 1 form a precise sliding fit, providing vertical movement trajectory constraints for the sleeve 3, further ensuring that the sleeve 3 only rises and falls smoothly in the vertical direction, without jamming or deviation, and ensuring the stability of displacement transmission.

[0028] Inside the sleeve 3, the magnetic body 4 is tightly fixed by the clamping arc surface 35 of the upper sleeve 33 and the lower sleeve 34. When the sleeve 3 rises and falls with the liquid level, the magnetic body 4 moves vertically in sync. Two or three sets of magnetic flap measuring units 2 are arrayed around the cylinder 1. They capture the position change of the magnetic body 4 in real time through magnetic field induction. The flaps at the corresponding positions flip under the action of the magnetic field. When the magnetic body 4 falls, the flaps reset in the opposite direction. Multiple sets of flaps synchronously feed back liquid level information from different angles, which not only eliminates the blind spot of a single observation direction, but also avoids the instantaneous reading deviation caused by liquid surface fluctuations, so as to realize the intuitive and accurate display of liquid level height.

[0029] During operation, the air-sealing assembly 7 continuously provides safety protection. Within the air-sealing cavity 73 formed by the tight sealing of the upper and lower pressure seals 71 and 72, the clamping element 75 and spring 76 consistently apply pressure to the upper and lower rubber rings 74, ensuring a tight seal between the rubber rings 74 and the outer wall of the guide rod 5 passing through them. Even with frequent rises and falls in the liquid level, this prevents leakage of harmful liquid vapors from the container along the gap between the guide rod 5 and the assembly. The first washer 77 at the connection surface between the upper pressure seal 71 and the sleeve 3, and the second washer 78 between the rubber ring 74 and the spring 76 in the lower pressure seal 72, further... The sealing effect is enhanced by filling the gaps between components. At the same time, the air inlet pipe 81 on the side of the upper pressure seal 71 is continuously connected to the inert gas in the inert gas tank 83, so that the air-sealed cavity 73 maintains a slightly positive pressure environment. This balances the pressure generated by the volatilization of harmful liquid in the container, slows down the evaporation rate of the liquid, isolates the air from the liquid in the container, prevents the liquid from reacting and deteriorating with the air, and also prevents harmful vapors from mixing with the air to form a flammable and explosive risk. If a small amount of harmful vapors accumulate in the cavity, they can be discharged by opening the closed cap 84 of the air outlet pipe 82 to ensure that the protection is continuously effective.

[0030] When the liquid level rises to the preset over-limit height, the sleeve 3 drives the magnetic body 4 to rise synchronously to the top area of ​​the cylinder 1. The magnetic field generated by the magnetic body 4 triggers the alarm light 85 trigger point inside the top cover 8, and the alarm light 85 lights up, promptly issuing an over-limit warning to the staff to prevent the medium from overflowing. If the liquid level drops to the safe lower limit, when the magnetic body 4 drops to the corresponding trigger position, the alarm light 85 can also activate the warning according to the preset logic to remind the replenishment of the medium, thereby achieving accurate and safe liquid level monitoring.

Claims

1. A flip-plate magnetic float level gauge, comprising a cylindrical body (1) disposed at the top of a container, wherein a magnetic flip-plate measuring part (2) is provided on the side of the cylindrical body (1), characterized in that, The inner wall of the cylinder (1) is provided with a threaded guide groove (11), and a sleeve (3) is installed inside the cylinder (1). The outer wall of the sleeve (3) is provided with a thread (31) corresponding to the threaded guide groove (11). The sleeve (3) is slidably installed inside the cylinder (1) through the thread (31) and the threaded guide groove (11). A magnetic body (4) is installed inside the sleeve (3). The bottom of the sleeve (3) is rotatably connected to the guide rod (5) through the connecting part (32). A float (6) is installed at the bottom of the guide rod (5). The bottom of the sleeve (3) is fitted with an air seal assembly (7), the bottom of which is fixedly installed to the top of the container, and the guide rod (5) passes through the air seal assembly (7).

2. The level gauge with a flap magnetic float according to claim 1, characterized in that, The air-sealing assembly (7) includes an upper pressure seal (71) fixedly installed at the bottom of the cylinder (1) and a lower pressure seal (72) fixedly installed on the lower side of the upper pressure seal (71). The bottom of the lower pressure seal (72) is fixedly installed to the top of the container. When the upper pressure seal (71) and the lower pressure seal (72) are closed, an air-sealing cavity (73) is formed in the middle. The air-sealing cavity (73) extends upward into the cylinder (1) and downward into the container. The upper pressure seal (71) and the lower pressure seal (72) are both recessed at the through-hole to form an installation groove. A rubber ring (74) is installed in the installation groove. The inner diameter of the rubber ring (74) is set to fit tightly with the guide rod (5). A clamping member (75) is provided in the air-sealed cavity (73), and a spring (76) is fitted on the clamping member (75). The upper side of the clamping member (75) presses against the rubber ring (74) in the upper sealing member (71), and the bottom of the spring (76) presses against the rubber ring (74) in the lower sealing member (72).

3. The level gauge with a flap magnetic float according to claim 2, characterized in that, The upper pressure seal (71) is connected to the sleeve (3) with a first washer (77) installed on the surface. The lower pressure seal (72) is connected to the rubber ring (74) and the spring (76) with a second washer (78). The bottom of the spring (76) is pressed against the second washer (78) and presses the rubber ring (74) in the lower pressure seal (72) tightly.

4. A flap magnetic float level gauge according to claim 2 or 3, characterized in that, An air inlet pipe (81) and an air outlet pipe (82) are provided through the upper pressure seal (71). The air inlet pipe (81) and the air outlet pipe (82) are connected to the air seal cavity (73). The air inlet pipe (81) is connected to the inert gas tank (83). The air outlet pipe (82) has a closing cap (84) at the outlet end.

5. A flap magnetic float level gauge according to claim 4, characterized in that, The inert gas tank (83) is fixedly installed on the sleeve (3) side.

6. The flip-plate magnetic float level gauge according to claim 1, characterized in that, The sleeve (3) includes an upper sleeve (33) and a lower sleeve (34). The upper sleeve (33) and the lower sleeve (34) are provided with a clamping arc surface (35) for attaching to the magnetic body (4) when they are in contact. When the upper sleeve (33) and the lower sleeve (34) are closed and fixed, the clamping arc surface (35) clamps and fixes the magnetic body (4).

7. A flap magnetic float level gauge according to claim 1, characterized in that, The bottom of the sleeve (3) is rotatably connected to the guide rod (5) through the connecting part (32). The connecting part (32) consists of several connecting plates extending from the bottom periphery of the sleeve (3) toward the center. The connecting plates have a rotating hole at the connection point of the center point, and the guide rod (5) is rotatably connected through the rotating hole.

8. A flap magnetic float level gauge according to claim 1, characterized in that, The top of the cylinder (1) is detachably mounted with a top cover (8), and an alarm light (85) is provided on the top cover (8). The trigger point of the alarm light (85) is located inside the top cover (8).

9. A flap magnetic float level gauge according to claim 1, characterized in that, The cylinder (1) is provided with a magnetic flip plate measuring part (2) on one side. The magnetic flip plate measuring part (2) consists of 2 or 3 groups, which are arranged in an array around the cylinder (1).

10. A flap magnetic float level gauge according to claim 1, characterized in that, The bottom of the gas seal assembly (7) is fixedly installed to the top of the container by threads or flanges.

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