Intelligent radar liquid level meter

Abstract

The application discloses an intelligent radar liquid level meter, which comprises a liquid level meter body, the liquid level meter body is installed on the top of a container, the lower end of the liquid level meter body is provided with a cover body, the bottom of the cover body is provided with a plurality of sliding rails, each sliding rail is slidably connected with a horizontal adjusting plate, the side of the adjusting plate close to the center of the cover body is an isosceles angular structure, the included angle between the two sides of the angular structure is 360 divided by the number of the sliding rails, the middle of the plurality of adjusting plates is provided with a plurality of polygonal communication openings, a floating structure is slidably arranged on the cover body along the vertical direction, a transmission structure is arranged between the floating structure and the adjusting plate, and the transmission structure can drive the plurality of adjusting plates to perform a first stroke or a second stroke when the floating structure is upwardly moved under the action of the liquid buoyancy.

Description

Technical Field

[0001] This invention belongs to the field of liquid level measurement technology, specifically, it relates to an intelligent radar liquid level gauge. Background Technology

[0002] A radar level gauge is a measuring instrument based on the time-of-flight principle. It measures liquid level by emitting high-frequency electromagnetic waves (i.e., radar waves) and receiving their reflected signals. Intelligent radar level gauges have further improved signal transmission and monitoring. With core functions such as multi-mode communication protocols, high-speed data sampling, low-power remote transmission, intelligent algorithm interference filtering, cloud integration, and visualization, they have built an efficient, stable, and accurate remote monitoring system.

[0003] When using a radar level gauge to measure a medium, if the liquid volume in the tank increases rapidly due to excessive feeding speed, failure of level monitoring leading to overfilling, or abnormal process control causing a sudden rise in liquid level, the medium may come into contact with the bottom of the antenna inside the horn, thereby causing corrosion and other damage to the antenna.

[0004] To address this technical issue, an annular baffle is typically installed at the bottom of the horn opening to prevent the medium from contacting the antenna. However, when the medium rises and comes into contact with the annular baffle, it adheres to the bottom of the baffle. To avoid affecting the normal operation of the radar level gauge, the annular baffle needs to be cleaned regularly. This not only increases the workload of the operators but also disrupts normal production processes and reduces production efficiency if cleaning is required. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide an intelligent radar level gauge to solve the technical problem that regularly cleaning the annular baffle not only increases the workload of workers, but also disrupts the normal production process and affects production efficiency if cleaning is required by stopping the machine.

[0006] To achieve the aforementioned objectives, the technical solution adopted by this invention includes: an intelligent radar level gauge for measuring the liquid level in a container, comprising a level gauge body mounted on the top of the container, and a horn-shaped cover located inside the container at the lower end of the level gauge body. The bottom of the cover has multiple sliding tracks, which form a regular polygonal ring structure concentric with the lower end of the cover. The ring structure surrounds the outer side of the lower end of the cover. A horizontal adjusting plate is slidably connected to each sliding track. The upper side of the adjusting plate abuts against the lower end of the cover. The side of the adjusting plate near the center of the cover is an isosceles angular structure. The angle between the two sides of the angular structure is 360° divided by the number of sliding tracks. The sides of two adjacent angular structures abut against each other. The multiple adjustment plates form a regular polygonal connecting port in the middle, the number of sides of the connecting port being the same as the number of sliding tracks. The multiple adjustment plates have a first stroke that slides along their respective sliding tracks in any circumferential direction and a second stroke that is opposite to the first stroke. In the first stroke, the area of ​​the connecting port decreases so that the area of ​​the bottom of the cover communicating with the outside decreases, and when the tips of the multiple angular structures abut each other, the multiple adjustment plates completely close the bottom of the cover. In the second stroke, the area of ​​the connecting port increases so that the area of ​​the bottom of the cover communicating with the outside increases. A floating structure is slidably arranged on the cover along the vertical direction. The floating structure can move upward under the action of liquid buoyancy. A transmission structure is provided between the floating structure and the adjusting plate. When the floating structure moves upward under the action of the measured liquid buoyancy, the transmission structure can drive multiple adjusting plates to perform a first stroke. In the first stroke, when multiple adjusting plates completely close the bottom of the cover, the liquid level is located below the lower end of the cover. When the floating structure moves downward under the action of its gravity, it can drive multiple adjusting plates to perform a second stroke.

[0007] Compared with the prior art, the advantages of the present invention include: (1) The present invention provides an intelligent radar level gauge with a floating structure that can sense the extreme conditions of the liquid level. When the liquid level rises to its maximum limit, multiple adjusting plates can slide synchronously through a transmission structure to completely seal the bottom of the cover, thus protecting the antenna inside the cover. When the liquid level drops to a safe position, multiple adjusting plates slide synchronously to open the bottom of the cover, allowing the antenna inside the cover to re-emit radar waves for liquid level measurement.

[0008] (2) The intelligent radar level gauge provided by this invention has significant advantages over the method of setting an annular baffle at the bottom of the horn mouth to prevent liquid from contacting the antenna, which requires regular cleaning of the annular baffle. It effectively protects the antenna inside the housing during liquid level rise, and during normal measurement when the liquid level drops, the radar wave is directly emitted to the liquid surface without passing through the adjusting plate, as the adjusting plate has released the seal on the bottom of the housing. This eliminates the need for frequent cleaning of impurities adhering to the adjusting plate. This not only reduces the workload of workers but also avoids disrupting the production process by eliminating the need for machine shutdown for cleaning, thereby improving production efficiency.

[0009] (3) The intelligent radar level gauge provided by this invention, when the floating structure moves upward, the area of ​​the connecting port formed in the middle of the adjusting plate gradually decreases inward. This is because the radar waves emitted by the radar antenna diverge outward in a fan shape within the directional beam range, and the signal strength is strongest in the middle (center of the main lobe). During the gradual shrinking of the connecting port, its central area can always be used for radar wave transmission until the adjusting plate completely seals the bottom of the housing. That is to say, the radar level gauge will only lose its measurement function when the bottom of the housing is completely sealed. Therefore, this method makes the radar level gauge have a better measurement range, can more sensitively sense the liquid level limit situation, and has better applicability.

[0010] Furthermore, the transmission structure includes a first plate and a second plate arranged horizontally at the bottom of the cover in a vertically downward direction. Both the first plate and the second plate are annular structures with the same inner and outer diameters. The first plate is fixed to the cover and surrounds the outer side of the lower end of the cover. The inner side of the first plate abuts against the outer side of the lower end of the cover. The second plate is rotatably connected directly below the first plate. Multiple sliding tracks are arranged at the bottom of the second plate and surround the inner circumference of the second plate. The lower part of the adjustment plate is provided with an annular support plate, which is fixedly connected to the first plate. The support plate is provided with limiting grooves that correspond one-to-one with the sliding rails. Each limiting groove is intersected with its corresponding sliding rail. A limiting post is provided in the limiting groove, and the limiting post is connected one-to-one with the adjustment plate. A rotating post is provided on the side wall of the second plate. By rotating the rotating post, the second plate can be rotated. Thus, under the cooperation of the limiting groove and the limiting post, multiple adjustment plates can perform a first stroke and a second stroke. The floating structure includes a mounting ring and a float disposed on the outside of the mounting ring. The mounting ring is slidably disposed on the first plate in a vertical direction. The inner side of the mounting ring abuts against the outer side of the first plate and the second plate. A sliding groove is formed on the inner side of the mounting ring. The sliding groove is inclined. The end of the rotating column away from the second plate is located in the sliding groove. When the liquid level rises, the float moves upward under the action of buoyancy and simultaneously drives the mounting ring to move upward. Then, under the action of the sliding groove, the rotating column is driven to rotate so that the multiple adjusting plates perform the first stroke.

[0011] Furthermore, a mounting base is provided on the top of the first plate, and a vertically arranged sleeve is fixed on the mounting base. The sleeve is a hollow cylindrical structure with an open top. A magnetic rod is provided inside the sleeve. The magnetic rod slides and fits in the sleeve along the vertical direction. An elastic element for supporting the magnetic rod is provided between the magnetic rod and the sleeve. A pull rope is provided between the magnetic rod and the first plate. One end of the pull rope is connected to the bottom of the magnetic rod, and the other end extends downward through the sleeve and is connected to the mounting ring. The outer wall of the sleeve has a through hole communicating with the inside of the sleeve. The through hole is an L-shaped structure composed of a vertical part and a horizontal part. The lower side of the horizontal part is inclined downward away from the vertical part. A locking rod is installed in the through hole. The locking rod is fixedly connected to the magnetic rod. A vertical push rod is installed on the mounting ring. The push rod is located below the locking rod. The top of the push rod is inclined. When the locking rod abuts against the upper side of the horizontal part of the through hole, and the push rod moves upward, it can be pushed from the horizontal part to the vertical part by the inclined surface, so that the magnetic rod moves upward rapidly under the elastic force of the elastic element. When the mounting ring moves downward under the action of gravity, it can drive the magnetic rod downward by pulling the rope, and then move to the horizontal part through the lower side of the horizontal part. A coil is provided directly above the sleeve, and the coil is fixed on the cover. The magnetic rod can extend into the inside of the coil as it slides upward inside the sleeve. The radar level gauge also includes an alarm, which is electrically connected to the coil. When the magnetic rod moves rapidly upward and extends into the coil, it can generate an electromotive force to make the alarm sound.

[0012] Furthermore, the radar level gauge also includes a controller and a valve for controlling the inlet of liquid into the container. The controller is connected to an alarm signal and the valve signal. The alarm emits an alarm signal, the controller receives the alarm signal from the alarm and issues a control command, which is then transmitted to the valve to close the valve.

[0013] Furthermore, the top of the first plate is a sloping structure, and the sloping structure is inclined downward on the side away from the cover.

[0014] Furthermore, the bottom of the adjusting plate abuts against the support plate.

[0015] Furthermore, the mounting ring adopts a hollow structure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure before the first stroke in an embodiment of the present invention. Figure 1 ; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure; Figure 3This is a schematic diagram of the structure before the first stroke in an embodiment of the present invention. Figure 2 ; Figure 4 for Figure 1 A structural schematic diagram of the second plate and related parts of the adjustment plate; Figure 5 This is a schematic diagram of the structure before the second stroke in an embodiment of the present invention. Figure 1 ; Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure; Figure 7 This is a schematic diagram of the structure before the second stroke in an embodiment of the present invention. Figure 2 ; Figure 8 for Figure 7 A schematic diagram of the structure of the second plate and related parts of the adjustment plate.

[0018] Figure label: 1. Level gauge body; 2. Cover; 3. Antenna; 4. Sliding rail; 5. Adjusting plate; 6. Connecting port; 7. First plate; 8. Second plate; 9. Support plate; 10. Limiting groove; 11. Limiting column; 12. Rotating column; 13. Mounting ring; 14. Float; 15. Slide groove; 16. Mounting base; 17. Sleeve; 18. Magnetic rod; 19. Elastic element; 20. Pull rope; 21. Through hole; 22. Vertical part; 23. Horizontal part; 24. Push rod; 25. Coil; 26. Flow guide; 27. Isolation ring; 28. Locking rod. Detailed Implementation

[0019] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0020] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0022] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0023] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0024] Please see Figure 1-8 This invention provides a technical solution: an intelligent radar level gauge for measuring the liquid level in a container. The level gauge body 1 is installed on the top of the container and serves as the core of the entire measurement system, integrating key components such as radar transmitting and receiving devices. It measures the liquid level by emitting radar waves and receiving reflected waves. The lower end of the level gauge body 1 has a horn-shaped cover 2 located inside the container. The cover 2 serves two purposes: firstly, it protects the key component at the lower end of the level gauge body 1, namely the antenna 3; secondly, the horn-shaped structure helps the radar waves to better transmit and receive reflected waves into the liquid area below, improving measurement accuracy.

[0025] The bottom of the cover 2 has multiple sliding tracks 4, which form a ring structure of a regular polygon concentric with the lower end of the cover 2. The ring structure surrounds the outer side of the lower end of the cover 2. A horizontal adjusting plate 5 is slidably connected to each sliding track 4. The upper side of the adjusting plate 5 abuts against the lower end of the cover 2 to form a seal, creating a sealed protective space inside the cover 2 when the adjusting plate 5 completely seals the lower end. It should be noted that the regular polygon has at least three sides. The adjusting plate 5 near the center of the cover 2 is an isosceles angular structure. The included angle between the two sides of this angular structure is 360 degrees divided by the number of sliding tracks 4. This is to meet the structural requirement of forming a seal. For example, when the ring structure is a regular triangle, the included angle should be 120 degrees, and the apexes of the angular structures should abut to form a complete seal. In this embodiment, the ring structure is a regular hexagon, and the included angle between the two sides of the angular structure is 60 degrees. The sides of adjacent angular structures abut against each other. The function of the sliding track 4 is to provide a guide path for the horizontal sliding of the adjusting plate 5, so that the adjusting plate 5 can move stably in a predetermined direction. The function of the adjusting plate 5 is to change the area of ​​the bottom of the cover 2 connected to the outside by its own sliding. Its angular structure design allows multiple adjusting plates 5 to form a regular geometric shape (i.e., the regular polygonal connecting opening 6 described below) when they cooperate with each other, thereby controlling the size of the connecting opening 6. The waists of adjacent angular structures abut against each other to ensure that the adjusting plates 5 fit tightly together during the sliding process, reducing the possibility of gaps that allow them to enter the cover 2.

[0026] Multiple adjusting plates 5 form a regular polygonal connecting port 6 in their center. The number of sides of the connecting port 6 is the same as the number of sliding tracks 4. This connecting port 6 is formed by the waist of multiple angular structures. The multiple adjusting plates 5 have a first stroke that slides along their respective sliding tracks 4 in any circumferential direction, and a second stroke that is opposite to the first stroke. It should be noted that the multiple adjusting plates 5 sliding along their respective sliding tracks 4 in any circumferential direction means that each adjusting plate 5 slides within its respective sliding track 4, and the overall direction of the sliding of the multiple adjusting plates 5 can be regarded as clockwise or counterclockwise. In the first stroke, the area of ​​the connecting port 6 decreases so that the area connecting the bottom of the cover 2 to the outside decreases, and when the tips of the multiple angular structures abut together, the multiple adjusting plates completely close the bottom of the cover 2. In the second stroke, the area of ​​the connecting port 6 increases so that the area connecting the bottom of the cover 2 to the outside increases. The function of the connecting port 6 is to provide a transmission channel for radar waves emitted by the antenna 3 inside the cover 2, so that the radar waves can reach the liquid surface inside the container smoothly.

[0027] A floating structure slides vertically along the top of the enclosure 2, and this floating structure can move upwards using the buoyancy of the liquid. Its core function is to sense the extreme conditions of the liquid level inside the container: when the liquid level rises to the point where it touches the floating structure, it indicates that the liquid level inside the container is close to the bottom of the enclosure 2. To reduce the impact of the liquid on the antenna 3 inside the enclosure 2 as the liquid level continues to rise, the lower end of the enclosure 2 needs to be sealed by the adjusting plate 5, thereby forming a protective space for the antenna 3 inside the enclosure 2.

[0028] A transmission structure is provided between the floating structure and the adjusting plates 5. When the floating structure moves upward under the buoyancy of the liquid, the transmission structure drives the multiple adjusting plates 5 to complete the first stroke. During the first stroke, when the multiple adjusting plates 5 completely close the bottom of the cover 2, the liquid level is below the lower end of the cover 2. At this time, even if the liquid level continues to rise, the lower end of the cover 2 is completely closed due to the abutting of the tips of the multiple angular structures, and the abutting of the tips forms a limit, preventing the floating structure from rising further. However, the buoyancy exerted by the liquid on the floating structure still exists, which ensures that the position of the adjusting plates 5 is relatively stable, maintaining the closed state of the lower end of the cover 2.

[0029] When the floating structure moves downward under its own weight, the transmission structure drives multiple adjusting plates 5 to perform a second stroke. That is, when the liquid level drops to a safe level, the floating structure moves downward under gravity. The transmission structure converts the vertical movement of the floating structure into the horizontal sliding of the adjusting plates 5, achieving linkage between liquid level changes and the movement of the adjusting plates 5. Specifically, when the floating structure moves upward under buoyancy, the transmission structure transmits this upward force to the adjusting plates 5, driving them to perform a first stroke, reducing the area of ​​the connecting opening 6 until the adjusting plates 5 finally close the lower end of the cover 2. When the floating structure moves downward under gravity, the transmission structure similarly drives the adjusting plates 5 to perform a second stroke, increasing the area of ​​the connecting opening 6, allowing the radar waves emitted by the antenna 3 inside the cover 2 to be retransmitted to the liquid surface for liquid level measurement.

[0030] In practical application of the above scheme, the floating structure can sense the extreme conditions of the liquid level. When the liquid level rises to its maximum, the transmission structure allows multiple adjusting plates 5 to slide synchronously, completely sealing the bottom of the cover 2 and protecting the antenna 3 inside the cover 2. When the liquid level drops to a safe position, the multiple adjusting plates 5 slide synchronously, opening the bottom of the cover 2, allowing the antenna 3 inside the cover 2 to re-emitter radar waves for liquid level measurement.

[0031] Compared to the method of setting an annular baffle at the bottom of the horn mouth to prevent liquid from contacting the antenna 3, which requires regular cleaning of the annular baffle, this solution has significant advantages. It effectively protects the antenna 3 inside the housing 2 during liquid level rise, and during normal measurements when the liquid level drops, because the regulating plate 5 has released the seal on the bottom of the housing 2, radar waves can be emitted directly to the liquid surface without passing through the regulating plate 5, thus eliminating the need for frequent cleaning of impurities adhering to the regulating plate 5. This not only reduces the workload of personnel but also avoids disrupting the production process by eliminating the need for machine shutdown for cleaning, thereby improving production efficiency.

[0032] The specific usage steps are as follows: Step 1: After the intelligent radar level gauge is installed, it can be used normally. The level gauge body 1 measures the liquid level in the container by emitting radar waves and receiving reflected waves. At this time, the multiple adjustment plates 5 at the bottom of the cover 2 are in the initial position. The regular polygonal connecting port 6 formed in the middle of the multiple adjustment plates 5 is the size of the connecting port 6 under normal measurement. The radar waves emitted by the antenna 3 inside the cover 2 can reach the liquid surface in the container smoothly through the connecting port 6 to measure the liquid level.

[0033] Step 2: As the liquid level in the container rises, when the liquid level rises to a point where it comes into contact with the floating structure that slides vertically on the cover 2, it indicates that the liquid level in the container is close to the bottom of the cover 2.

[0034] Step 3: The floating structure moves upward under the buoyancy of the liquid. The upward force is transmitted to multiple adjusting plates 5 through the transmission structure, driving the multiple adjusting plates 5 to perform the first stroke. That is, each adjusting plate 5 slides in its own sliding track 4, the area of ​​the connecting port 6 decreases, and the area of ​​the bottom of the cover 2 connected to the outside decreases.

[0035] Step 4: During the first stroke, when the tips of multiple angular structures abut each other, multiple adjusting plates 5 completely seal the bottom of the cover 2, forming a protective space for the antenna 3 inside the cover 2. At this time, the liquid level is below the lower end of the cover 2. Even if the liquid level continues to rise, the floating structure will no longer rise due to the limit formed by the abutting of the tips of multiple angular structures. Moreover, the buoyancy exerted by the liquid on the floating structure ensures that the position of the adjusting plate 5 is relatively stable, maintaining the closed state of the lower end of the cover 2.

[0036] Step 5: When the liquid level in the container drops, the floating structure moves downward under its own gravity, and the transmission structure drives multiple adjusting plates 5 to perform a second stroke, that is, each adjusting plate 5 slides in its respective sliding track 4 in the opposite direction to the first stroke, the area of ​​the connecting port 6 increases, and the area of ​​the bottom of the cover 2 connected to the outside increases.

[0037] Step 6: When the liquid level drops to the safe level, multiple adjusting plates 5 slide synchronously to restore the connecting port 6 to the normal measurement size, and the antenna 3 inside the cover 2 can re-emit radar waves to the liquid surface to continue liquid level measurement.

[0038] In this embodiment, the transmission structure includes a first plate 7 and a second plate 8 horizontally arranged sequentially at the bottom of the cover 2 along a vertically downward direction. Both the first plate 7 and the second plate 8 are annular structures with identical inner and outer diameters. The first plate 7 is fixed to the cover 2 and surrounds the outer side of the lower end of the cover 2, with its inner side abutting against the outer side of the lower end of the cover 2. The first plate 7 serves as a fixed support and provides a mounting base for the second plate 8. The second plate 8 is rotatably connected directly below the first plate 7. Multiple sliding tracks 4 are arranged at the bottom of the second plate 8 and surround its inner circumference. The second plate 8 rotates to drive the adjusting plate 5 to perform corresponding stroke movements. The sliding tracks 4 at its bottom allow the adjusting plate 5 to slide along a predetermined path, thereby changing the size of the opening at the bottom of the cover 2.

[0039] A ring-shaped support plate 9 is provided at the lower part of the adjusting plate 5. The inner and outer diameters of the support plate 9 are the same as those of the second plate 8. The surface of the support plate 9 has multiple perforated structures to reduce weight. The support plate 9 is fixedly connected to the first plate 7. The function of the support plate 9 is to provide stable support for the adjusting plate 5, so that the adjusting plate 5 remains horizontal during sliding. The support plate 9 has limiting grooves 10 that correspond one-to-one with the sliding rails 4. Each limiting groove 10 is intersected with its corresponding sliding rail 4. Because of the intersecting arrangement, the limiting grooves can limit the limiting posts, thereby driving the adjusting plate to slide within the sliding rails. A limiting post 11 is provided in the limiting groove 10. The limiting post 11 is connected to the adjusting plate 5 one by one. When the second plate 8 is rotated, the adjusting plate will move synchronously. The limiting post 11 slides along the limiting groove 10. If the position of the adjusting plate 5 on the second plate 8 does not change, it will be stuck. Since the adjusting plate 5 is slidably connected to the second plate 8 through the sliding rail 4, the adjusting plate 5 can slide along the sliding rail 4 when the limiting post 11 slides along the limiting groove 10.

[0040] The second plate 8 is provided with a rotating column 12 on its side wall. By rotating the rotating column 12, the second plate 8 can be rotated. Then, under the cooperation of the limiting groove 10 and the limiting column 11, multiple adjusting plates 5 can perform the first stroke and the second stroke. The rotating column 12 is the key component for driving the rotation of the second plate 8. By applying force to the rotating column 12 from the outside, it is made to rotate, thereby driving the second plate 8 to rotate, and finally realizing the sliding action of the adjusting plate 5.

[0041] The floating structure includes a mounting ring 13 and a float 14 disposed on the outside of the mounting ring 13. The mounting ring 13 is slidably mounted on the first plate 7 in a vertical direction. The mounting ring 13 provides a foundation for the installation of the float 14 and other internal structures. Simultaneously, its ability to slide vertically on the first plate 7 allows the entire floating structure to move up and down according to changes in the liquid level. The inner side of the mounting ring 13 abuts against the outer sides of the first plate 7 and the second plate 8. This abutting design ensures the stability of the mounting ring 13 during sliding, reducing the possibility of swaying and thus affecting the transmission effect. A groove 15 is provided on the inner side of the mounting ring 13. The groove 15 is inclined, and the end of the rotating column 12 away from the second plate 8 is located in the groove 15. The inclined setting of the groove 15 is the key design of the entire transmission structure to realize the linkage between liquid level change and the movement of the regulating plate 5. When the liquid level rises, the float 14 moves upward under the action of buoyancy, which synchronously drives the mounting ring 13 to move upward. Since the groove 15 is inclined, during the upward movement of the mounting ring 13, a lateral component force will be generated on the rotating column 12 located in the groove 15. This component force will drive the rotating column 12 to move upward. The rotating column 12 rotates, which in turn drives the second plate 8 to rotate, ultimately causing multiple adjusting plates 5 to complete the first stroke, reducing the opening area at the bottom of the cover 2. Conversely, when the liquid level drops, the float 14 and the mounting ring 13 move downward under the action of gravity, which also generates a lateral force in the opposite direction on the rotating column 12 through the sliding groove 15, driving the adjusting plates 5 to complete the second stroke, increasing the opening area at the bottom of the cover 2. This design cleverly utilizes the linkage of buoyancy, gravity and mechanical structure to achieve automatic control of liquid level changes and the movement of the adjusting plates 5.

[0042] As the liquid level in the container rises, the float 14 moves upward under buoyancy, simultaneously causing the mounting ring 13 to slide vertically upward along the first plate 7. Because the inner groove 15 of the mounting ring 13 is inclined, during the upward movement of the mounting ring 13, a lateral force is generated on the rotating column 12 located within the groove 15, driving the rotating column 12 to rotate, which in turn drives the second plate 8 to rotate. When the second plate 8 rotates, because the limiting column 11 slides within the limiting groove 10 of the support plate 9, and the adjusting plate 5 is slidably connected to the second plate 8 via the sliding track 4, under the combined action of the limiting groove 10 and the limiting column 11, the adjusting plate 5 slides along the sliding track 4. Multiple adjusting plates 5 complete their first stroke, reducing the opening area until the tips of multiple angular structures abut each other, completely sealing the bottom of the cover 2 and forming a protective space for the antenna 3 within the cover 2.

[0043] As the liquid level in the container drops, the float 14 and mounting ring 13 slide vertically downwards along the first plate 7 under the influence of gravity. During the downward movement of the mounting ring 13, a lateral force opposite to that during the upward movement is generated on the rotating column 12 through the sliding groove 15, driving the rotating column 12 to rotate in the opposite direction, which in turn drives the second plate 8 to rotate in the opposite direction. When the second plate 8 rotates in the opposite direction, with the cooperation of the limiting groove 10 and the limiting column 11, the adjusting plate 5 slides in the opposite direction along the sliding track 4. Multiple adjusting plates 5 perform a second stroke, increasing the opening area until the normal measurement state is restored. The antenna 3 inside the cover 2 then re-emits radar waves to the liquid surface for liquid level measurement.

[0044] In this embodiment: A mounting base 16 is provided on the top of the first plate 7, and a vertically arranged sleeve 17 is fixed on the mounting base 16. The sleeve 17 is a hollow cylindrical structure with an open top. The function of the sleeve 17 is to provide vertical movement space for the magnetic rod 18. The magnetic rod 18 is arranged inside the sleeve 17 and slides vertically within the sleeve 17. As one of the core components, the magnetic rod 18 can slide up and down within the sleeve 17, and its change in motion is a key factor in triggering subsequent alarm actions. An elastic element 19 is provided between the magnetic rod 18 and the sleeve 17 to support the magnetic rod 18. The function of the elastic element 19 is to provide an upward elastic force to the magnetic rod 18, so that the magnetic rod 18 can move upward under the action of its elastic force when unrestricted. At the same time, when the magnetic rod 18 is subjected to a downward pulling force or other external force and moves downward, the elastic element 19 can store elastic potential energy to facilitate the secondary upward movement of the magnetic rod 18. Specifically, the elastic element 19 is a spring that is sleeved outside the magnetic rod 18. The spring is located inside the sleeve 17 and below the magnetic rod 18. One end of the spring abuts against the bottom of the magnetic rod 18, and the other end is fixedly connected to the sleeve 17.

[0045] A pull rope 20 is provided between the magnetic rod 18 and the mounting ring 13. One end of the pull rope 20 is fixedly connected to the bottom of the magnetic rod 18, and the other end extends downward through the sleeve 17 and is fixedly connected to the mounting ring 13. The function of the pull rope 20 is to link the up-and-down movement of the mounting ring 13 with the up-and-down movement of the magnetic rod 18. When the mounting ring 13 moves downward, the pull rope 20 pulls the magnetic rod 18 downward. During this process, the elastic element 19 stores elastic potential energy. When the magnetic rod 18 is restricted, the pull rope 20 will gradually loosen as the mounting ring 13 moves upward. When the mounting ring 13 rises to a certain position, the restriction on the magnetic rod 18 is released, and the magnetic rod 18 moves upward rapidly under the action of the elastic element 19. Since the pull rope 20 is in a loose state, it cannot cause too much resistance to the upward movement of the magnetic rod 18 so that the magnetic rod 18 can move upward rapidly (when the pull rope 20 is loose, the magnetic rod 18 moves upward a certain distance, which will drive the pull rope 20 to move upward a certain distance simultaneously until the pull rope 20 is taut. After the pull rope 20 is taut, the upward movement of the magnetic rod 18 will drive the mounting ring 13 to move upward through the pull rope 20, thus causing a certain resistance. However, when the pull rope 20 is loose, the resistance can be ignored).

[0046] The outer wall of the sleeve 17 has a through hole 21 communicating with the inside of the sleeve 17. The through hole 21 is an L-shaped structure composed of a vertical part 22 and a horizontal part 23. The lower side of the horizontal part 23, away from the vertical part 22, is inclined downward. A locking rod 28 is installed in the through hole 21 and is fixedly connected to the magnetic rod 18. The locking rod 28 moves within the through hole 21 as the magnetic rod 18 moves up and down. Its function is to lock the position of the magnetic rod 18 by abutting against different positions in the through hole 21. Specifically, when the locking rod 28 moves downward, it can slide under the lower side of the horizontal part 23 into the horizontal part 23. After the force applied to the locking rod 28 is removed, the locking rod 28 moves upward under the elastic force of the elastic member 19 and abuts against the upper side of the horizontal part 23, thereby locking the position of the magnetic rod 18.

[0047] A vertical push rod 24 is provided on the mounting ring 13. The push rod 24 is located below the locking rod 28. The top of the push rod 24 is inclined. The function of the push rod 24 is to contact the locking rod 28 through the inclined surface of its top when it moves upward, and push the locking rod 28 to move from the horizontal part to the vertical part 22 in the through hole 21.

[0048] When the locking rod 28 abuts against the upper side of the horizontal portion of the through hole 21, and the push rod 24 moves upward, the inclined plane pushes the locking rod 28 from the horizontal portion to the vertical portion 22, causing the magnetic rod 18 to move rapidly upward under the elastic force of the elastic element 19. The working principle of this process is as follows: when the locking rod 28 is subjected to the elastic force of the elastic element 19 on the upper side of the horizontal portion of the through hole 21, the position of the magnetic rod 18 is restricted. When the push rod 24 moves upward and pushes the locking rod 28 through the inclined plane, the locking rod 28 moves from the horizontal portion of the through hole 21 to the horizontal portion 23. At this time, the locking rod 28 is no longer restricted by the horizontal portion in the vertical direction, so it can move arbitrarily in the vertical portion 22. The restriction on the magnetic rod 18 is released accordingly, and the magnetic rod 18 moves rapidly upward under the elastic force of the elastic element 19.

[0049] When the mounting ring 13 moves downward under the action of gravity, it can drive the magnetic rod 18 downward through the pull rope 20, and then move to the horizontal part through the lower side of the horizontal part 23. The working principle of this process is as follows: the first plate 7 moves downward under the action of gravity, the pull rope 20 is tightened, and the magnetic rod 18 is pulled downward. The locking rod 28 moves with the magnetic rod 18. When the locking rod 28 moves to the lower side of the horizontal part 23 of the through hole 21, since the lower side of the horizontal part 23 is inclined downward away from the vertical part 22, the locking rod 28 will move to the horizontal part along the inclined surface, thereby restricting the magnetic rod 18 to the current position.

[0050] A coil 25 is positioned directly above the sleeve 17 and is fixed to the cover 2. The function of the coil 25 is to generate an electromotive force (EMF) when the magnetic rod 18 rapidly extends into it, due to the change in magnetic flux, based on the principle of electromagnetic induction. The magnetic rod 18's upward sliding motion within the sleeve 17 allows it to penetrate the coil 25; this is the key action for achieving electromagnetic induction. The rapid movement of the magnetic rod 18 alters the magnetic field within the coil 25, thereby generating an EMF. It should be noted that the magnetic rod 18, under the action of the pull rope 20, moves with the mounting ring 13... The radar level gauge also includes an alarm, which is electrically connected to the coil 25. When the magnetic rod 18 rapidly moves upward and extends into the coil 25, it generates an electromotive force (EMF) to trigger the alarm. The alarm's function is to issue an alarm signal after detecting the EMF generated by the coil 25. Its working principle is that when the magnetic rod 18 rapidly moves upward and extends into the coil 25, generating an EMF, the EMF forms a current. This current is transmitted to the alarm, triggering it to sound an alarm, thereby alerting relevant personnel that the level gauge has detected the extreme liquid level.

[0051] In this embodiment, the radar level gauge also includes a controller and a valve for controlling the inflow of liquid into the container. The controller is connected to the alarm signal and the valve signal. As the intelligent control core of the entire system, the controller receives signals from other components, analyzes and processes them according to preset programs and logic, and then issues corresponding control commands to achieve automated control of the entire radar level gauge system.

[0052] The controller is used to control the inlet valve of the container, controlling the flow of liquid into the container. When the valve is open, liquid can smoothly enter the container; when the valve is closed, liquid cannot enter the container. The working state of the valve directly determines the final liquid level height in the container, making it a key component for achieving liquid level control.

[0053] When the liquid level reaches its maximum limit, an alarm is triggered. The controller receives the alarm signal and issues a control command. Upon receiving the alarm signal, the controller analyzes and judges the situation based on its internal preset logic and program. The controller determines that it is necessary to stop the liquid from entering the container to prevent the liquid level from rising further and causing danger or affecting the normal operation of the equipment. It then transmits the control command to the valve to close it. The controller transmits the valve closing command to the valve via a signal. Upon receiving the command, the valve's internal drive mechanism activates, changing the valve's state from open to closed, thereby preventing the liquid from entering the container. This achieves liquid level control, reduces the occurrence of a series of problems caused by abnormal liquid levels, and ensures the safe and stable operation of the entire system.

[0054] In this embodiment: when the liquid level rises past the mounting ring 13, a certain accommodating space is formed between the mounting ring 13 and the first plate 7. After the mounting ring 13 moves down, liquid may accumulate on the top of the first plate 7. The top of the first plate 7 has a sloping structure, and the sloping structure is inclined downwards on the side away from the cover 2. This allows the liquid to flow out under the guidance of the sloping structure.

[0055] Furthermore, a flow guide 26 is provided at the top of the mounting ring 13. Liquid can also be discharged through the flow guide 26.

[0056] In this embodiment: to clean the bottom of the adjusting plate 5, the bottom of the adjusting plate 5 abuts against the support plate 9. Thus, during the sliding process, the adjusting plate 5 can generate relative friction with the support plate 9 to clean the bottom of the adjusting plate 5.

[0057] In this embodiment: In order to reduce the weight of the mounting ring 13 so as to better withstand the buoyancy of the liquid, the mounting ring 13 adopts a hollow structure.

[0058] In this embodiment, the bottom of the support plate 9 has an isolation ring 27. The isolation ring 27 isolates the sliding track 4, the limiting groove 10, and the limiting post 11 from the liquid, thus providing better protection for these components. It should be understood that the above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the invention and implement it accordingly. It should not be construed that the specific implementation of the invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A smart radar level gauge for measuring the liquid level in a container, comprising a level gauge body mounted on the top of the container, the level gauge body having a horn-shaped cover at its lower end, the cover being located inside the container, characterized in that: The bottom of the cover has multiple sliding tracks, which form a regular polygonal ring structure concentric with the lower end of the cover. The ring structure surrounds the outer side of the lower end of the cover. A horizontal adjusting plate is slidably connected to each sliding track. The upper side of the adjusting plate abuts against the lower end of the cover. The side of the adjusting plate near the center of the cover is an isosceles angular structure. The angle between the two sides of the angular structure is 360° divided by the number of sliding tracks. The sides of two adjacent angular structures abut against each other. The multiple adjustment plates form a regular polygonal connecting port in the middle, the number of sides of the connecting port being the same as the number of sliding tracks. The multiple adjustment plates have a first stroke that slides along their respective sliding tracks in any circumferential direction and a second stroke that is opposite to the first stroke. In the first stroke, the area of ​​the connecting port decreases so that the area of ​​the bottom of the cover communicating with the outside decreases, and when the tips of the multiple angular structures abut each other, the multiple adjustment plates completely close the bottom of the cover. In the second stroke, the area of ​​the connecting port increases so that the area of ​​the bottom of the cover communicating with the outside increases. A floating structure is slidably arranged on the cover along the vertical direction. The floating structure can move upward under the action of liquid buoyancy. A transmission structure is provided between the floating structure and the adjusting plate. When the floating structure moves upward under the action of the measured liquid buoyancy, the transmission structure can drive multiple adjusting plates to perform a first stroke. In the first stroke, when multiple adjusting plates completely close the bottom of the cover, the liquid level is located below the lower end of the cover. When the floating structure moves downward under the action of its gravity, it can drive multiple adjusting plates to perform a second stroke.

2. The intelligent radar level gauge according to claim 1, characterized in that: The transmission structure includes a first plate and a second plate horizontally arranged sequentially at the bottom of the cover along a vertically downward direction. Both the first plate and the second plate are annular structures with the same inner and outer diameters. The first plate is fixed to the cover and surrounds the outer side of the lower end of the cover. The inner side of the first plate abuts against the outer side of the lower end of the cover. The second plate is rotatably connected directly below the first plate. Multiple sliding tracks are arranged at the bottom of the second plate and surround the inner circumference of the second plate. The lower part of the adjustment plate is provided with an annular support plate, which is fixedly connected to the first plate. The support plate is provided with limiting grooves that correspond one-to-one with the sliding rails. Each limiting groove is intersected with its corresponding sliding rail. A limiting post is provided in the limiting groove, and the limiting post is connected one-to-one with the adjustment plate. A rotating post is provided on the side wall of the second plate. By rotating the rotating post, the second plate can be rotated. Thus, under the cooperation of the limiting groove and the limiting post, multiple adjustment plates can perform a first stroke and a second stroke. The floating structure includes a mounting ring and a float disposed on the outside of the mounting ring. The mounting ring is slidably disposed on the first plate in a vertical direction. The inner side of the mounting ring abuts against the outer side of the first plate and the second plate. A sliding groove is formed on the inner side of the mounting ring. The sliding groove is inclined. The end of the rotating column away from the second plate is located in the sliding groove. When the liquid level rises, the float moves upward under the action of buoyancy and simultaneously drives the mounting ring to move upward. Then, under the action of the sliding groove, the rotating column is driven to rotate so that the multiple adjusting plates perform the first stroke.

3. The intelligent radar level gauge according to claim 2, characterized in that: The first plate has a mounting base at its top, and a vertically arranged sleeve is fixed on the mounting base. The sleeve is a hollow cylindrical structure with an open top. A magnetic rod is arranged inside the sleeve. The magnetic rod slides and fits inside the sleeve in a vertical direction. An elastic element for supporting the magnetic rod is arranged between the magnetic rod and the sleeve. A pull rope is arranged between the magnetic rod and the mounting ring. One end of the pull rope is connected to the bottom of the magnetic rod, and the other end extends downward through the sleeve and is connected to the mounting ring. The outer wall of the sleeve has a through hole communicating with the inside of the sleeve. The through hole is an L-shaped structure composed of a vertical part and a horizontal part. The lower side of the horizontal part is inclined downward away from the vertical part. A locking rod is installed in the through hole. The locking rod is fixedly connected to the magnetic rod. A vertical push rod is installed on the mounting ring. The push rod is located below the locking rod. The top of the push rod is inclined. When the locking rod abuts against the upper side of the horizontal part of the through hole, and the push rod moves upward, it can be pushed from the horizontal part to the vertical part by the inclined surface, so that the magnetic rod moves upward rapidly under the elastic force of the elastic element. When the mounting ring moves downward under the action of gravity, it can drive the magnetic rod downward by pulling the rope, and then move to the horizontal part through the lower side of the horizontal part. A coil is provided directly above the sleeve, and the coil is fixed on the cover. The magnetic rod can extend into the inside of the coil as it slides upward inside the sleeve. The radar level gauge also includes an alarm, which is electrically connected to the coil. When the magnetic rod moves rapidly upward and extends into the coil, it can generate an electromotive force to make the alarm sound.

4. The intelligent radar level gauge according to claim 3, characterized in that: The radar level gauge also includes a controller and a valve for controlling the inlet of the container. The controller is connected to an alarm signal and the valve signal. The alarm emits an alarm signal, the controller receives the alarm signal from the alarm and issues a control command, which is then transmitted to the valve to close the valve.

5. A smart radar level gauge according to any one of claims 2-4, characterized in that: The top of the first plate is a sloping structure, and the sloping structure is inclined downward on the side away from the cover.

6. The intelligent radar level gauge according to claim 5, characterized in that: The bottom of the adjusting plate abuts against the support plate.

7. The intelligent radar level gauge according to claim 6, characterized in that: The mounting ring has a hollow structure.

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