Intelligent temperature-control anti-crystallization magnetic flap liquid level meter and solution storage tank

Abstract

The invention discloses an intelligent temperature control anti-crystallization magnetic turning plate liquid level meter and a solution storage tank, the equipment comprises a measuring cylinder, the outer side of the measuring cylinder is sleeved with a constant-temperature jacket, the constant-temperature jacket is internally provided with a constant-temperature cavity, and the constant-temperature cavity is filled with a heat-conducting medium; the floater is connected into the measuring cylinder in a sliding manner, and a corrosion-resistant coating is arranged on the floater; the pull rod is also slidably connected in the measuring cylinder, the bottom of the pull rod is connected with a scraping plate, and the scraping plate is located above the floater and abuts against the inner wall of the measuring cylinder; the turning plate is arranged on one side of the measuring cylinder, and the end part of the turning plate extends into the measuring cylinder and is movably connected with the scraping plate; the remote transmission rod is arranged on one side, close to the measuring cylinder, of the turning plate; the circulating liquid upper communicating pipe is arranged on one side of the top of the measuring cylinder; the circulating liquid lower communicating pipe is arranged on one side of the bottom of the measuring cylinder; the conical crystal collecting tank is arranged below the measuring cylinder, a vibration motor and a urea solution lower communicating pipe are arranged on the conical crystal collecting tank, and a pressure transmission is arranged on the urea solution lower communicating pipe.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of liquid level meters, and particularly relates to an intelligent temperature control anti-crystallization magnetic float liquid level meter and a solution storage tank. BACKGROUND

[0002] The magnetic float liquid level meter is widely applied to liquid medium liquid level monitoring in the fields of chemical industry, electric power, environmental protection and the like due to its simple structure, intuitive display and convenient maintenance, and has important application value in a urea solution storage system. The traditional magnetic float liquid level meter is usually composed of a measuring cylinder, a float, a magnetic float and a shell, and realizes in-situ liquid level indication by driving the float to turn over to turn over the float with the rising and falling of the liquid level, and can output a standard signal in cooperation with a remote transmission device. In order to prevent the medium from solidifying or crystallizing in a low-temperature environment, the existing equipment usually heats the measuring cylinder by using electric heating or ordinary jacket insulation, and some structures are further provided with a blowdown opening for slagging. However, in the actual operation process, the traditional structure is difficult to effectively cope with the crystallization characteristics of the urea solution. Due to uneven heating, the local temperature of the measuring cylinder is low, and urea is precipitated on the inner wall to form a crystalline layer; at the same time, after the urea vapor enters the measuring cylinder, it condenses and gradually solidifies in the cold area, further aggravating the crystallization accumulation, eventually causing the float to jam and malfunction, resulting in incorrect liquid level display. In addition, there is a lack of online crystal cleaning mechanism, and the formed crystal must be cleaned and removed during shutdown, which seriously affects the continuity of production. The existing technology also lacks effective multi-source data comparison and judgment logic, and cannot identify crystallization interference in real time and adaptively adjust the temperature control parameters, so the overall intelligent level is low and the reliability is poor. SUMMARY

[0003] The purpose of the present application is to provide an intelligent temperature control anti-crystallization magnetic float liquid level meter and a solution storage tank to solve the technical defects of the magnetic float liquid level meter in the prior art, such as crystallization accumulation, float jamming, measurement error and frequent shutdown maintenance when measuring urea solution due to uneven temperature distribution, vapor condensation and lack of automatic crystal cleaning function.

[0004] The technical solution adopted by the present application is as follows: The first aspect of the present application provides an intelligent temperature control anti-crystallization magnetic float liquid level meter, comprising: a measuring cylinder, an outer side of which is provided with a constant temperature jacket, the constant temperature jacket has a constant temperature cavity therein, and the constant temperature cavity is filled with a heat conducting medium; a float, which is slidingly connected in the measuring cylinder, and is provided with a corrosion-resistant coating thereon; a pull rod, which is also slidingly connected in the measuring cylinder, and has a scraper connected at the bottom thereof, the scraper is located above the float and abuts against the inner wall of the measuring cylinder; a float, which is slidingly connected in the measuring cylinder, and is provided with a corrosion-resistant coating thereon; A remote rod is arranged on one side of the flap close to the measuring cylinder. A circulating liquid upper communication pipe is arranged on one side of the top of the measuring cylinder. A circulating liquid lower communication pipe is arranged on one side of the bottom of the measuring cylinder. A conical crystal collection tank is arranged below the measuring cylinder, and a vibration motor and a urea solution lower communication pipe are arranged on the conical crystal collection tank, and a pressure transmitter is arranged on the urea solution lower communication pipe. A circulating pump is connected with the circulating liquid upper communication pipe and the circulating liquid lower communication pipe. A first temperature measuring point and a second temperature measuring point are arranged at the bottom end and the top end of the constant temperature cavity. A central controller is electrically connected with the remote rod and the pressure transmitter. In an optional embodiment, a heater is arranged in the middle of the constant temperature cavity, and the heat conducting medium is glycol aqueous solution. The first temperature measuring point and the second temperature measuring point are arranged below and above the heater. In an optional embodiment, the corrosion-resistant coating is a polytetrafluoroethylene-ceramic composite coating. In an optional embodiment, the thickness of the corrosion-resistant coating is 0.1-0.2 mm. In an optional embodiment, the circulating liquid upper communication pipe and the circulating liquid lower communication pipe are axially parallel, and the circulating liquid upper communication pipe and the circulating liquid lower communication pipe are axially perpendicular to the measuring cylinder. In an optional embodiment, the circulating liquid upper communication pipe and the circulating liquid lower communication pipe are of the same structure.

[0005] In an optional embodiment, a pollution discharge valve is arranged at the bottom of the conical crystal collection tank.

[0006] In an optional embodiment, the vibration motor is axially perpendicular to the conical crystal collection tank.

[0007] In an optional embodiment, the pull rod is axially coincident with the measuring cylinder, and the scraper is of a ring structure. The second aspect of the application provides a solution storage tank, and the solution storage tank is provided with the intelligent temperature control anti-crystallization magnetic flap liquid level meter according to any one of the preceding aspects. Compared with the prior art, the application has the following beneficial effects: By installing a constant-temperature jacket with a heat-conducting medium on the outside of the measuring cylinder, and combining it with dual-point temperature measurement and control at the top and bottom and a circulating pump drive, uniform and stable control of the measuring cylinder wall temperature is achieved, avoiding urea crystallization caused by local low temperatures. The float surface is coated with a corrosion-resistant, low-adhesion coating, which significantly reduces the tendency for crystal adhesion. A scraper and pull rod linkage structure is set up to remove crystals from the inner wall without stopping the machine. The linkage between the flap and scraper ensures local display function while assisting in crystal removal. The bottom conical crystal collection tank integrates a vibration motor and a drain valve to achieve automatic loosening and discharge of detached crystals. The central controller compares the liquid level value with the remote transmission rod and the pressure conversion, identifies crystallization anomalies, and triggers temperature control enhancement and crystal removal actions, thereby solving the problems of float jamming and measurement inaccuracy caused by crystallization, and improving the reliability, automation level and service life of the equipment. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0009] Fig. 1 A schematic diagram of an intelligent temperature-controlled and anti-crystallization magnetic level gauge provided by the present invention; Fig. 2 A partial schematic diagram of an intelligent temperature-controlled and anti-crystallization magnetic level gauge provided by the present invention; Fig. 3 A schematic diagram of a conical crystallization collection tank in an intelligent temperature-controlled and anti-crystallization magnetic level gauge provided by the present invention; In the diagram: 1. Measuring cylinder; 2. Thermostatic jacket; 3. Thermostatic chamber; 4. Circulating pump; 5. Scraper; 6. Pull rod; 7. Conical crystallization collection tank; 8. Drain valve; 9. Float; 10. Corrosion-resistant coating; 11. Flip plate; 12. Vibration motor; 13. First temperature measuring point; 14. Heater; 15. Second temperature measuring point; 16. Remote transmission rod; 17. Urea solution lower connecting pipe; 18. Pressure transmitter; 19. Circulating liquid upper connecting pipe; 20. Circulating liquid lower connecting pipe. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0011] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the application.

[0012] It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0013] The application will be further described in detail below in conjunction with the drawings: As Figs. 1-3 shown, the first aspect of the embodiment of the application provides an intelligent temperature control anti-crystallization magnetic flap liquid level meter. A measuring cylinder 1 is provided with a constant temperature jacket 2 outside. The constant temperature jacket 2 has a constant temperature cavity 3 therein. The constant temperature cavity 3 is filled with a heat conducting medium. A float 9 is slidingly connected in the measuring cylinder 1. The float 9 is provided with a corrosion-resistant coating. A pull rod 6 is also slidingly connected in the measuring cylinder 1. The bottom of the pull rod 6 is connected with a scraper 5. The scraper 5 is located above the float 9 and abuts against the inner wall of the measuring cylinder 1. A flap 11 is provided on one side of the measuring cylinder 1. The end of the flap 11 extends into the measuring cylinder 1 and is movably connected with the scraper 5. A remote transmission rod 16 is provided on the side of the flap 11 close to the measuring cylinder 1. A circulating liquid upper communication pipe 19 is provided on one side of the top of the measuring cylinder 1. A circulating liquid lower communication pipe 20 is provided on one side of the bottom of the measuring cylinder 1. A conical crystallization collection groove 7 is provided below the measuring cylinder 1. The conical crystallization collection groove 7 is provided with a vibration motor 12 and a urea solution lower communication pipe 17. The urea solution lower communication pipe 17 is provided with a pressure transmitter 18. A circulating pump 4 is connected with the circulating liquid upper communication pipe 19 and the circulating liquid lower communication pipe 20. A first temperature measuring point 13 and a second temperature measuring point 15 are provided at the bottom end and the top end of the constant temperature cavity 3. A central controller is electrically connected with the remote transmission rod 16 and the pressure transmitter 18.

[0014] In the above structure, the measuring cylinder 1 serves as a core pressure-bearing component, which is used to contain the measured liquid and guide the float 9 to slide freely along the axial direction. The measuring cylinder 1 is provided with the constant temperature jacket 2 outside, and a closed constant temperature cavity 3 is formed between the two. The space is filled with a heat conducting medium, and heat transfer can be achieved through external circulation.

[0015] The design of the constant temperature jacket 2 enables the heat to be uniformly conducted to the wall surface of the measuring cylinder 1, avoiding the occurrence of local supercooling areas, thereby inhibiting the crystallization nucleation condition. The heat conducting medium can be selected from fluids such as water-glycol mixture, silicon oil or low-viscosity mineral oil, which have good fluidity and thermal stability, to meet the requirements of different temperature intervals.

[0016] The float 9 is a functional component embedded with a permanent magnet, which can move up and down with the liquid level change and drive the external flap 11 to flip through magnetic coupling, realizing on-site visual indication. To enhance its corrosion resistance and anti-crystallization adhesion performance, the float 9 is provided with a corrosion-resistant coating, which can effectively delay the crystallization accumulation speed.

[0017] The pull rod 6 is an elongated structural member arranged axially along the measuring cylinder 1 and fixedly connected with the scraper 5, and its other end extends to the outside of the device for easy operation. The scraper 5 is located above the float 9 and is arranged tightly against the inner wall of the measuring cylinder 1. When the pull rod 6 moves up and down, it drives the scraper 5 to run synchronously, which can remove the small crystalline particles or dirt layer attached to the cylinder wall.

[0018] The flap 11 is installed on the outside of the measuring cylinder 1 and is usually arranged in an array and flips the color (such as red and white alternation) in response to the position change of the float 9 through magnetic induction, realizing intuitive reading. One end of the flap 11 extends into the measuring cylinder 1 and forms a movable connection relationship with the scraper 5, so that when the pull rod 6 is pulled, the action of the scraper 5 can be transmitted to the flap 11 mechanism synchronously, assisting in completing the linkage crystal process.

[0019] The remote transmission rod 16 is arranged on the side of the flap 11 close to the measuring cylinder 1, which is used to convert the position information of the flap 11 into an electrical signal output, supporting remote monitoring and data recording.

[0020] The upper and lower circulation liquid communication pipes 19 and 20 are respectively arranged on one side of the top and bottom of the measuring cylinder 1, which constitutes part of the external heat exchange circuit. They are connected to the circulating pump 4 through the pipeline, so that the heat-conducting medium in the constant-temperature cavity 3 can continuously circulate, and the overall heat exchange efficiency is strengthened. The closed loop system can be configured with a heating source or a cooling unit according to the actual temperature control needs, realizing the bidirectional temperature regulation ability.

[0021] The conical crystallization collection tank 7 is arranged directly below the measuring cylinder 1, which is used to receive the crystalline materials falling from the cylinder or removed by scraping. Its conical structure is conducive to the concentration and guidance of the materials to the bottom discharge port, preventing accumulation and blockage. The tank body is equipped with a vibration motor 12, which can promote the loosening and accelerate the discharge of the crystalline materials through periodic vibration. At the same time, the urea solution lower communication pipe 17 is connected to the main storage tank, which is used to balance the pressure and maintain the smoothness of the liquid path. The pressure transmitter 18 arranged thereon can be used for real-time monitoring of the pipeline pressure state, indirectly reflecting the risk of crystallization blockage.

[0022] The central controller serves as the control center of the system, receiving the liquid level signal from the remote transmission rod 16 and the pressure data from the pressure transmitter 18, and analyzing and judging based on the preset logic. For example, when there is a significant deviation between the remote transmission signal and the pressure calculated liquid level, it can be identified as a sign of crystallization interference, and then trigger an alarm or start the corresponding response measures.

[0023] Due to the setting of the constant temperature jacket 2 and the heat conduction medium circulation path, the temperature gradient can be eliminated on a macro scale, and the possibility of low-temperature induced crystallization is fundamentally reduced; the corrosion-resistant coating on the surface of the float 9 reduces the adhesion strength of the crystalline material, making it easier to be flushed or mechanically removed by the fluid; the cooperation of the pull rod 6 and the scraper 5 provides a direct physical removal means, combined with the linkage design of the flap 11 to enhance the operation convenience; the conical crystallization collection groove 7 and the vibration motor 12 jointly construct a crystalline material post-processing channel to avoid secondary pollution; the central controller has a preliminary state recognition ability through the comparison and analysis of the remote and pressure signals, which helps to discover abnormal trends in time. Therefore, the device shows higher measurement accuracy and operation reliability when facing urea solution and other easy crystallization conditions, effectively solving the problems of jamming, false display and frequent shutdown caused by crystallization in the prior art.

[0024] In the scheme, the middle part of the constant temperature cavity 3 is provided with a heater 14, and the heat conduction medium is ethylene glycol aqueous solution; the first temperature measuring point 13 and the second temperature measuring point 15 are located below and above the heater 14; by arranging the heater 14 inside the constant temperature cavity 3, combined with the high-efficiency heat conduction medium, the uniformity and control accuracy of the overall temperature field of the measuring cylinder 1 are improved, thereby effectively inhibiting the urea crystallization phenomenon caused by local low temperature.

[0025] Among them, the middle part of the constant temperature cavity 3 is provided with a heater 14, and the heater 14 is arranged in the geometric center area of the closed constant temperature cavity 3 formed by the constant temperature jacket 2, so that the heat can be conducted to the upper and lower ends in a nearly symmetrical manner, avoiding the problem of large temperature gradient and easy condensation at the upper part caused by traditional single-side heating at the bottom or top, and making the heat distribution more balanced.

[0026] The heater 14 can adopt a corrosion-resistant metal packaging structure to ensure that it does not chemically react with the heat conduction medium during long-term operation, while having good thermal response characteristics, facilitating power adjustment by the central controller.

[0027] In the scheme, the heat conduction medium is ethylene glycol aqueous solution, which is suitable as a heat transfer working medium for temperature control systems in industrial environments. The solution is filled in the constant temperature cavity 3 and forms forced convection under the drive of the circulating pump 4, significantly enhancing the heat transfer efficiency and preventing local overheating or supercooling. In addition, the ethylene glycol aqueous solution also has certain rust prevention and corrosion inhibition performance, which helps to prolong the service life of the constant temperature jacket 2 and the connecting pipeline.

[0028] As an optional embodiment, the heat conduction medium can also be replaced by propylene glycol aqueous solution or silicon oil organic medium, which is suitable for antifreeze requirements under different environmental temperature conditions, but ethylene glycol aqueous solution is more suitable in this scenario due to its low cost and excellent performance.

[0029] The first temperature measuring point 13 and the second temperature measuring point 15 are located below and above the heater 14, that is, temperature sensors are arranged on both sides of the heater 14 in the vertical direction of the heater 14, the first temperature measuring point 13 is arranged at a distance below the heater 14, and is used for monitoring the low-temperature risk of the area far away from the heat source; the second temperature measuring point 15 is arranged at a corresponding position above the heater 14, and is used for monitoring whether there is an overheating tendency in the heat rising process. The up-and-down double-point temperature measurement layout realizes dynamic capture of the temperature gradient of the constant-temperature cavity 3 along the axial direction, and provides a judgment basis for the central controller. When it is detected that the lower temperature is obviously lower than the upper temperature, it can be judged that there is insufficient heating or poor circulation, and then the rotating speed of the circulating pump 4 or the heating power is automatically increased; on the contrary, if the upper temperature abnormally rises, it may indicate that there is gas resistance or local boiling, and the heating intensity needs to be reduced. The design overcomes the defect that a single temperature measuring point is difficult to reflect the overall temperature distribution, and improves the accuracy and robustness of the temperature control strategy.

[0030] Through the above technical scheme, the application realizes fine management of the internal thermal environment of the constant-temperature cavity 3. Since the heater 14 is arranged in the middle of the constant-temperature cavity 3, and the circulating flow of the high-flowability ethylene glycol aqueous solution is matched, the heat diffusion from the center to the periphery is more uniform, and the axial temperature difference is reduced. At the same time, the first temperature measuring point 13 and the second temperature measuring point 15 arranged in an up-and-down manner can synchronously perceive the temperature changes of the near end and the far end of the heater 14, and provide comprehensive temperature field information for the control system.

[0031] In the scheme, the corrosion-resistant coating 10 is a polytetrafluoroethylene-ceramic composite coating. In view of the problems that the float 9 is easily corroded on the surface, crystallization is seriously attached, and cleaning is difficult during long-term operation in strong corrosive media such as urea solution, a composite coating of specific material combination is proposed to improve the corrosion resistance and surface non-adhesion of the float 9.

[0032] The corrosion-resistant coating is a polytetrafluoroethylene-ceramic composite coating, which combines the ultra-low surface energy characteristics of polytetrafluoroethylene (PTFE) and the high hardness, high temperature resistance and chemical inertness of inorganic ceramic materials. The coating is uniformly coated on the surface of the float 9 base by thermal spraying or plasma spraying process, forming a dense and continuous protective layer.

[0033] In the scheme, the thickness of the corrosion-resistant coating is 0.1-0.2 mm. The corrosion-resistant coating 10 is arranged on the surface of the float 9, which is used to reduce the chemical corrosion of the urea solution on the float 9 base material, and to reduce the attachment tendency of crystalline substances on the surface of the float 9.

[0034] In the scheme, the upper circulating liquid communication pipe 19 and the lower circulating liquid communication pipe 20 are axially parallel, and the upper circulating liquid communication pipe 19 and the lower circulating liquid communication pipe 20 are axially perpendicular to the measuring cylinder 1. Among them, the upper circulating liquid communication pipe 19 and the lower circulating liquid communication pipe 20 maintain an axial parallel relationship in spatial layout, that is, the center axes of the two are parallel to each other, forming a symmetrical and regular external connection structure.

[0035] The parallel arrangement facilitates the connection of the pipeline with the circulating pump 4, reduces the number of pipe fittings such as elbows, tees, and other pipe fittings, reduces the local resistance loss during fluid flow, and improves the overall flow efficiency of the system. The upper circulating liquid communication pipe 19 and the lower circulating liquid communication pipe 20 are connected to the measuring cylinder 1 in an axial vertical manner, that is, the axis of the connection port is at a 90° angle with the axis of the main body of the measuring cylinder 1, realizing a lateral inlet and outlet flow design. This vertical connection avoids the structural interference problem caused by the extension of the pipeline along the axis of the measuring cylinder 1, especially does not affect the sliding operation path of the internal float 9, the pull rod 6 and the scraper 5, and guarantees the free travel of the internal moving parts of the measuring cylinder 1.

[0036] In the scheme, the upper circulating liquid communication pipe 19 and the lower circulating liquid communication pipe 20 are the same structure, realizing the standardization and generalization of the connection parts; among them, the upper circulating liquid communication pipe 19 is arranged on one side of the top of the measuring cylinder 1, used for leading out the circulating heat conducting medium in the constant temperature cavity 3; the lower circulating liquid communication pipe 20 is arranged on one side of the bottom of the measuring cylinder 1, used for re-feeding the heat conducting medium delivered by the external circulating pump 4 into the constant temperature cavity 3.

[0037] In the scheme, the bottom of the conical crystallization collection tank 7 is provided with a blowdown valve 8. This embodiment realizes the centralized discharge of the urea crystals accumulated at the bottom of the tank by arranging the blowdown valve 8 at the bottom of the conical crystallization collection tank 7, effectively solves the problem of long-term accumulation of crystals in the traditional magnetic flap liquid level device due to the lack of automatic discharge mechanism, and the need for manual cleaning during shutdown, improves the continuity and maintenance convenience of the device operation.

[0038] The blowdown valve 8 is arranged at the lowest end of the conical crystallization collection tank 7, that is, the lowest point position, to ensure complete discharge of the residue. The blowdown valve 8 can be a controllable form such as an electric ball valve, a pneumatic stop valve or an electromagnetic valve, and can be selected as an electric ball valve with feedback signal to facilitate linkage control with the central controller. When the system determines that the residue needs to be discharged, the controller issues an instruction to open the blowdown valve 8, and the duration is 10s-60s, which is determined according to the amount of crystals; after the discharge is completed, it is automatically closed to prevent solution leakage. In the non-automated scenario, a manual valve can also be used as an alternative solution to meet the different needs of users.

[0039] The drain valve 8 is connected to an external drain pipe, and the outlet can be connected to a closed waste liquid recovery system or a dedicated crystallization treatment device to avoid environmental pollution. To prevent the high-temperature urea solution from cooling and crystallizing during the discharge process and clogging the pipe, in some embodiments a heat tracing layer, such as an electric heat tracing tape or a small jacketed pipe, can be added to the outside of the drain pipe to maintain the pipe temperature above 50°C.

[0040] The conical crystallization collection tank 7 is connected to the bottom of the measuring cylinder 1 via a urea solution connecting pipe 17, allowing bidirectional flow of the solution during normal operation. When crystals detach from the inner wall of the measuring cylinder 1 under the vibration of the vibrating motor 12 and enter the collection tank with the fluid, the crystal particles gradually accumulate at the bottom of the tank due to the reduced flow velocity and gravity settling. At this point, the sediment can be discharged from the system by periodically or conditionally opening the drain valve 8, forming a complete physical crystallization closed-loop path.

[0041] Through the above technical solution, this application achieves the timely or on-demand discharge of urea crystals that have detached and settled at the bottom of the conical crystallization collection tank 7 due to vibration, via a drain valve 8 located at the bottom, without interrupting equipment operation. This avoids the risk of channel blockage or measurement inaccuracies caused by long-term accumulation of crystals. Although the structure is simple, it significantly improves the end-stage execution of the automatic crystal-clearing system, enabling the entire anti-crystallization system to have full-process capabilities from detection and loosening to removal and discharge. This effectively addresses the problem of "crystallization accumulation that cannot be automatically discharged" mentioned in the background technology, improving the automation level and long-term operational reliability of the equipment.

[0042] In this scheme, the vibration motor 12 is axially perpendicular to the conical crystallization collection tank 7. By setting the vibration motor 12 to be axially perpendicular to the conical crystallization collection tank 7, the transmission efficiency of vibration energy in the collection tank structure can be effectively improved, the peeling effect on the attached crystals can be enhanced, and the risk of mechanical fatigue caused by asymmetric vibration can be reduced, thereby improving the reliability of the crystallization process and the service life of the equipment.

[0043] Among them, the vibration motor 12 refers to the drive device installed on the side wall or bottom of the conical crystallization collection tank 7 to apply mechanical vibration. Its function is to disturb the urea crystal deposits on the inner wall surface of the tank through periodic vibration force, so that they are loosened and detached from the attachment surface. The vibration motor 12 can be an electromagnetic, eccentric wheel or piezoelectric vibration mechanism, and can be selected as a low-frequency large amplitude AC or DC motor, with the characteristics of controllable start and stop and rapid response.

[0044] The vibration motor 12 is fixed to the outer wall of the collection tank by bolts or welding, and its output end forms a rigid or elastic coupling with the tank body to ensure efficient transmission of vibration energy.

[0045] In an alternative embodiment, the vibration motor 12 can also be replaced by an ultrasonic transducer array, with a working frequency set in the range of 20 kHz to 60 kHz, to achieve resonance breaking of micro-crystals.

[0046] The vibration motor 12 serves as a power source, and the design of its vibration direction directly affects the propagation path and intensity of energy in the conical crystal collection groove 7; and the conical structure itself has a guiding and gathering effect, which, in combination with vibration excitation of a specific direction, can achieve effective loosening and directional discharge of the crystals.

[0047] When the vibration motor 12 is installed in the conical crystal collection groove 7 in an axially perpendicular manner, the vibration energy mainly acts on the crystal adhesion area in the form of a transverse shear wave, significantly enhancing the breaking efficiency of the crystal layer; at the same time, the problem of structural resonance or seal wear caused by axial vibration is avoided, ensuring the safety and stability of long-term operation of the equipment. This layout makes full use of the best path of mechanical transmission, improves the execution effect of the automatic crystal cleaning function without increasing additional energy consumption, and solves the technical problems of incomplete crystal cleaning and equipment damage caused by unreasonable vibration direction.

[0048] In this scheme, the pull rod 6 is axially coincident with the measuring cylinder 1, the scraper 5 is of a ring structure, the pull rod 6 is arranged along the central axis of the measuring cylinder 1, ensuring that its movement trajectory is consistent with the geometric center of the measuring cylinder 1; the scraper 5 is designed in a ring shape and is arranged around the bottom of the pull rod 6 and is in circumferential contact with the inner wall of the measuring cylinder 1. This structure enables the scraper 5 to always contact the inner wall of the cylinder with balanced pressure during the sliding process of the float 9, achieving 360° dead angle-free cleaning. The pull rod 6, as a transmission component, is used to connect the external operating mechanism and the internal scraper 5, and its setting direction is completely coincident with the axis of the measuring cylinder 1, avoiding the problems of unilateral stress or inclined jamming of the scraper 5 caused by eccentric installation, and improving the stability and directivity during the lifting process.

[0049] The pull rod 6 can be made of stainless steel, which has good strength and corrosion resistance and is suitable for strong corrosive medium environments such as urea solution. In other alternative embodiments, the pull rod 6 can also be made of titanium alloy or carbon steel with a surface sprayed anti-corrosion coating to meet the long-term operation requirements in different working conditions. The scraper 5 is of a ring structure and is in the shape of a circular ring, and its outer diameter is slightly larger than the inner diameter of the measuring cylinder 1, so as to ensure that it can form a slight interference fit with the inner wall of the cylinder in a free state.

[0050] In the second aspect of the embodiment of the present application, a kind of solution storage tank is provided, and the intelligent temperature control anti-crystallization magnetic flap liquid level equipment described above is arranged on the solution storage tank.

[0051] The application integrates the magnetic flap liquid level device with intelligent temperature control and automatic anti-crystallization function on the solution storage tank, forming a combination of liquid level measurement, temperature regulation and crystallization protection. It not only realizes real-time and stable monitoring of the liquid level in the tank, but also effectively deals with the crystallization risk of urea and other easily crystallized solutions caused by temperature fluctuations or vapor condensation during long-term storage, improving the operation reliability and automation level of the entire storage and transportation system. The solution storage tank is a container for storing urea solution or other easily crystallized liquids. The side wall or bottom of the tank is provided with a connecting interface for installing the aforementioned intelligent temperature control and anti-crystallization magnetic flap liquid level device. The liquid level device is connected to the external constant temperature circulation system through the upper and lower circulating liquid communication pipes 19 and 20, realizing accurate control of the temperature of the outer wall of the measuring cylinder 1. It is connected to the inside of the storage tank through the urea solution lower communication pipe 17, ensuring that the liquid level in the measuring cylinder 1 is consistent with the actual liquid level of the tank body. The configured magnetic flap liquid level device includes a measuring cylinder 1, which is externally sleeved with a constant temperature jacket 2. The constant temperature jacket 2 forms a constant temperature cavity 3 filled with heat conducting medium inside. The heat conducting medium can be driven to flow by the heater 14 and circulating pump 4, maintaining the wall surface temperature of the measuring cylinder 1 uniform and stable in the anti-crystallization interval (such as 55±2℃). The float 9 is slidingly arranged in the measuring cylinder 1, and the surface has a low adhesion coating 10, which can reduce the adhesion tendency of urea crystals while avoiding chemical corrosion. The pull rod 6 connects the scraper 5, which can be manually operated to remove the deposits on the inner wall when needed. The flap 11 is located on one side of the measuring cylinder 1 and turns over with the float 9, realizing on-site liquid level indication. The remote transmission rod 16 can transmit the liquid level signal to the central controller remotely, realizing remote monitoring. In addition, the conical crystallization collection groove 7 is arranged below the measuring cylinder 1 for capturing the crystalline particles that may fall off or settle. The vibration motor 12 provided thereon can periodically vibrate to loosen the accumulated material, cooperating with the bottom blowdown valve 8 to realize automatic crystal removal, avoiding blockage or affecting the measurement accuracy. The pressure transmitter 18 is arranged on the urea solution lower communication pipe 17 for detecting the static pressure and converting it into a reference liquid level value for data comparison and abnormality judgment by the central controller. The above-mentioned components work cooperatively, so that the liquid level device can not only accurately reflect the liquid level change, but also actively inhibit the crystallization and timely remove the formed crystals, thereby ensuring the long-term operation stability. Especially in high temperature and humidity or large diurnal temperature difference industrial environments, such integrated design significantly reduces the maintenance frequency and downtime risk.

[0052] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A temperature-controlling anti-crystallization intelligent magnetic float liquid level meter, characterized in that, include: The measuring cylinder is fitted with a constant temperature jacket on the outside, and the constant temperature jacket has a constant temperature cavity filled with a heat-conducting medium. A float is slidably connected to the measuring cylinder, and the float is provided with a corrosion-resistant coating; The pull rod is also slidably connected to the measuring cylinder, and a scraper is connected to its bottom. The scraper is located above the float and abuts against the inner wall of the measuring cylinder. A flap is provided on one side of the measuring cylinder, and the end of the flap extends into the measuring cylinder and is movably connected to the scraper. The remote transmission rod is located on the side of the flap closer to the measuring cylinder; The circulating fluid connecting pipe is located on one side of the top of the measuring cylinder; The circulating liquid connecting pipe is located on one side of the bottom of the measuring cylinder; A conical crystallization collection tank is located below the measuring cylinder. The conical crystallization collection tank is equipped with a vibration motor and a urea solution lower connecting pipe. A pressure transmission is installed on the urea solution lower connecting pipe. A circulation pump is connected to the upper connecting pipe and the lower connecting pipe of the circulating liquid; The first and second temperature measuring points are located at the bottom and top of the constant temperature chamber, respectively. The central controller is electrically connected to the remote transmission rod and pressure transmitter.

2. The intelligent temperature-controlled anti-crystallization magnetic float level meter according to claim 1, characterized in that, A heater is provided in the middle of the constant temperature cavity, and the heat conduction medium is an aqueous solution of ethylene glycol; The first temperature measuring point and the second temperature measuring point are located below and above the heater, respectively.

3. The intelligent temperature-controlled anti-crystallization magnetic float level meter according to claim 1, characterized in that, The corrosion-resistant coating is a polytetrafluoroethylene-ceramic composite coating.

4. The intelligent temperature-controlled anti-crystallization magnetic float level meter according to claim 1 or 3, characterized in that, The thickness of the corrosion-resistant coating is 0.1~0.2mm.

5. The intelligent temperature controlled anti-crystallization magnetic float level meter according to claim 1, characterized in that, The upper and lower circulating fluid connecting pipes are axially parallel, and the upper and lower circulating fluid connecting pipes are axially perpendicular to the measuring cylinder.

6. The intelligent temperature-controlled anti-crystallization magnetic float level meter according to claim 5, characterized in that, The upper and lower connecting pipes of the circulating fluid have the same structure.

7. The intelligent temperature controlled anti-crystallization magnetic float level meter according to claim 1, characterized in that, The bottom of the conical crystallization collection tank is equipped with a drain valve.

8. The intelligent temperature controlled anti-crystallization magnetic float level meter according to claim 1, characterized in that, The vibration motor and the conical crystallization collection tank are axially perpendicular.

9. The intelligent temperature controlled anti-crystallization magnetic float level meter according to claim 1, characterized in that, The pull rod is axially aligned with the measuring cylinder, and the scraper has a ring structure.

10. A solution storage tank characterized by, The solution storage tank is equipped with a magnetic float level gauge with intelligent temperature control and anti-crystallization as described in any one of claims 1-9.

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