Intelligent liquid storage tank with anti-settling stirring structure

Abstract

The utility model relates to an intelligent liquid storage tank with anti-deposition stirring structure, which comprises a tank body, a movable support installed at the bottom of the tank body, a tank cover flange bolted at the top of the tank body, a sleeve rotationally connected to the inner bottom of the tank cover, a variable frequency motor installed at the top of the tank cover to drive the sleeve to rotate, a stirring shaft penetrating through the center of the inner bottom of the sleeve, a U-shaped scraper plate fixedly connected to the inner wall of the tank body at the bottom of the stirring shaft, a plurality of pairs of twisted paddles arranged between the outer wall of the stirring shaft and the scraper plate, a corrugated expansion pipe fixedly connected to the bottom of the sleeve and sealingly sleeved on the upper part of the stirring shaft, a power mechanism installed at the top of the tank cover to drive the stirring shaft to lift and rotate with the sleeve, a circulating pump mechanism installed in the sleeve and communicating with the inside of the tank body, a turbidity sensor embedded in one side of the inner wall of the tank body, a liquid level sensor installed at the top of the tank cover, and a controller connected to the variable frequency motor, the power mechanism, the turbidity sensor, and the liquid level sensor. The utility model has high intelligence and significantly enhanced anti-deposition reliability.

Description

Technical Field

[0001] This utility model relates to the field of liquid storage tanks, and in particular to an intelligent liquid storage tank with an anti-sedimentation stirring structure. Background Technology

[0002] Liquid storage tanks are widely used storage devices in industries such as chemical, food, and environmental protection, and are commonly used to store liquid raw materials, intermediate products, or finished products. In practical applications, many liquid media, such as fermentation broths, suspensions, and high-viscosity liquids, are prone to precipitation, stratification, or scaling during static storage, leading to decreased liquid homogeneity and affecting subsequent use or treatment results.

[0003] Several tank structures designed to address this problem have emerged in the prior art. For example, Chinese utility model patent CN219524941U discloses an intelligent liquid storage tank that uses a micro-pump and electromagnetic three-way valve on the outlet pipe to guide a portion of the liquid back into the tank via a return pipe, creating an internal small circulation flow to reduce sedimentation. Simultaneously, the tank is equipped with stirring blades and wall scrapers driven by a motor for periodic cleaning, and uses a connecting pipe and float-piston structure to detect the liquid level.

[0004] However, this existing technology still has some shortcomings: First, its circulation system relies on external pipes, the circulation path is fixed, and the disturbance to the overall flow field inside the tank is limited, resulting in poor anti-sedimentation effect, especially weak stirring effect in the center and bottom areas of the tank; second, its stirring structure is at a fixed height, which may create stirring dead zones at high liquid levels; third, although its liquid level detection method solves the sealing problem, it cannot perceive the physical and chemical state of the liquid in real time, such as the degree of sedimentation and turbidity, and its level of intelligence is limited. The stirring and circulation operations rely heavily on timed start and stop, which is not precise or energy-efficient. Summary of the Invention

[0005] This invention aims to address the shortcomings of existing technologies by providing an intelligent liquid storage tank with an anti-sedimentation stirring structure.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an intelligent liquid storage tank with an anti-sedimentation stirring structure, comprising a tank body, a movable support installed at the bottom of the tank body, a tank cover with a flange bolted to the top of the tank body, a sleeve rotatably connected to the bottom of the tank cover, a variable frequency motor for driving the sleeve to rotate installed at the top of the tank cover, a stirring shaft passing through the center of the bottom of the sleeve, a U-shaped scraper fixed to the bottom of the stirring shaft and in contact with the inner wall of the tank, several pairs of torsional blades between the outer wall of the stirring shaft and the scraper, a corrugated telescopic tube fixed to the bottom of the sleeve and sealed on the upper part of the stirring shaft, a power mechanism for driving the stirring shaft to rise and fall and rotate with the sleeve installed at the top of the tank cover, and a circulation pump mechanism communicating with the inside of the tank body installed inside the sleeve, a turbidity sensor embedded on one side of the inner wall of the tank, a liquid level sensor and a controller connected to the variable frequency motor, the power mechanism, the turbidity sensor and the liquid level sensor installed at the top of the tank cover.

[0007] Specifically, the top of the inner wall of the sleeve is provided with an internal gear ring, and the main shaft of the variable frequency motor passes through the sleeve and is fixedly connected with a gear that meshes with the internal gear ring.

[0008] Specifically, the tank has a liquid outlet with a valve at the bottom and a liquid inlet with a valve at the top of one side.

[0009] Specifically, the power mechanism includes a hydraulic cylinder mounted on the top of the tank cover, a spline sleeve fixed to the center of the bottom of the sleeve, and a stirring shaft inside the corrugated telescopic tube with spline teeth on the outer wall that mesh with the spline sleeve. The stirring shaft passes through the spline sleeve and is rotatably connected to the telescopic rod of the hydraulic cylinder that extends into the sleeve.

[0010] Specifically, the circulating pump mechanism includes a bracket mounted on one side of the inner wall of the sleeve, a micro pump mounted on the bracket, an inlet pipe of the micro pump that is sealed through the sleeve and located at the bottom of the tank, and an outlet pipe that is sealed through the sleeve and located at the upper part of the tank. The inlet and outlet pipes do not interfere with the stirring shaft, scraper, or impeller. A hollow shaft slip ring is provided at the center of the bottom of the tank cover, and the stator of the hollow shaft slip ring is fixedly connected to the tank cover. The rotor is connected to the inner wall of the sleeve through cantilever rods on both sides, and the wires on the rotor are laid along one cantilever rod and connected to the corresponding micro pump. The wires on the stator pass through the tank cover and are connected to an external power source. The telescopic rod of the hydraulic cylinder passes through the hollow shaft slip ring and does not contact the inner wall of the hollow shaft slip ring.

[0011] The beneficial effects of this utility model are:

[0012] The mixing effect is comprehensively improved: the overall lifting and lowering of the mixing shaft is driven by a hydraulic cylinder, which can keep the mixing components at the optimal working depth at different liquid levels. Combined with the torsion blades and U-shaped scrapers, it realizes the mixing and wall cleaning of the tank space from the center to the edge and from top to bottom without dead corners, and completely solves the dead corner problem of fixed mixing.

[0013] Intelligent control and energy saving: The turbidity sensor monitors the sedimentation of the liquid in the tank in real time. The controller can make intelligent decisions based on real-time data rather than fixed time, automatically starting and stopping the variable frequency motor, micro pump or lifting stirring shaft to achieve stirring on demand. While ensuring the anti-sedimentation effect, it minimizes energy consumption.

[0014] Integration and Reliability: The circulation pump mechanism, power mechanism, stirring shaft, liquid level sensor and tank cover are integrated, eliminating the need for complex external pipes and valves, etc., resulting in a simpler structure, lower risk of leakage and easier maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a schematic diagram of the installation of the circulating pump mechanism of this utility model inside the sleeve;

[0018] In the diagram: 1-Tank body; 2-Moving support; 3-Tank cover; 4-Sleeve; 5-Variable frequency motor; 6-Agitator shaft; 7-Scraper; 8-Impeller; 9-Corrugated telescopic pipe; 10-Turbidity sensor; 11-Level sensor; 12-Controller; 13-Internal gear ring; 14-Gear; 15-Outlet; 16-Inlet; 17-Hydraulic cylinder; 18-Spline sleeve; 19-Bracket; 20-Micro pump; 21-Hollow shaft slip ring; 22-Cantilever rod;

[0019] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] like Figures 1-3 As shown, an intelligent liquid storage tank with an anti-sedimentation stirring structure includes a tank body 1, a movable support 2 with casters installed at the bottom of the tank body 1 to facilitate the movement and positioning of the tank body 1, a tank cover 3 with a flange bolted to the top of the tank body 1, a liquid outlet 15 with a valve at the bottom of the tank body 1, and a liquid inlet 16 with a valve on one side of the top for filling and discharging materials.

[0022] A sleeve 4 is rotatably connected to the bottom of the can lid 3. A variable frequency motor 5, which drives the sleeve 4 to rotate, is installed on the top of the can lid 3. An internal gear ring 13 is provided on the top of the inner wall of the sleeve 4. The main shaft of the variable frequency motor 5 passes through the sleeve 4 and is fixedly connected to a gear 14 that meshes with the internal gear ring 13. When the variable frequency motor 5 is started, the entire sleeve 4 can be driven to rotate smoothly on the can lid 3 through the meshing transmission between the gear 14 and the internal gear ring 13.

[0023] A stirring shaft 6 is inserted through the center of the bottom of the sleeve 4. The bottom of the stirring shaft 6 extends to the lower part of the tank body 1. A U-shaped scraper 7 is fixed to the bottom of the stirring shaft 6 and contacts the inner wall of the tank body 1. A polyurethane scraper is provided on the side of the scraper 7 that contacts the tank wall. Several pairs of torsional blades 8 are provided between the outer wall of the stirring shaft 6 and the scraper 7 to generate a strong axial and radial flow field when rotating, so as to achieve efficient mixing.

[0024] The upper part of the stirring shaft 6 is sealed with a corrugated telescopic tube 9 that is fixed to the bottom of the sleeve 4, so that the inside of the sleeve 4 is always sealed when the stirring shaft 6 is raised and lowered, preventing the material inside the tank from entering.

[0025] A power mechanism is installed on the top of the tank lid 3 to drive the stirring shaft 6 to rise and fall and rotate with the sleeve 4. The power mechanism includes a hydraulic cylinder 17 installed on the top of the tank lid 3 and a spline sleeve 18 fixed to the center of the bottom inside the sleeve 4. The outer wall of the stirring shaft 6 inside the corrugated telescopic tube 9 is provided with spline teeth that mesh with the spline sleeve 18. The stirring shaft 6 passes through the spline sleeve 18 and is rotatably connected to the telescopic rod of the hydraulic cylinder 17 that extends into the sleeve 4. The top end of the stirring shaft 6 passes through the spline sleeve 18 and is rotatably connected to the end of the piston rod of the hydraulic cylinder 17 that extends into the sleeve 4 through a bearing. This structure allows the stirring shaft 6 and its scraper 7 and blade 8 to rise and fall as a whole when the hydraulic cylinder 17 drives the piston rod to extend and retract. At the same time, due to the characteristics of the spline connection, when the sleeve 4 is driven to rotate by the frequency converter motor 5, the torque can be transmitted to the stirring shaft 6 through the spline sleeve 18, causing it to rotate synchronously and realize the stirring function.

[0026] A circulation pump mechanism communicating with the inside of the tank 1 is installed inside the sleeve 4. The circulation pump mechanism includes a bracket 19 installed on one side of the inner wall of the sleeve 4 and a micro pump 20 installed on the bracket 19. The water inlet pipe of the micro pump 20 is sealed through the sleeve 4 and located in the sedimentation area at the bottom of the tank 1. The water outlet pipe is sealed through the sleeve 4 and located in the upper part of the tank 1. The water inlet pipe and the water outlet pipe do not interfere with the stirring shaft 6, scraper 7, and impeller 8. A hollow shaft slip ring 21 is provided at the center of the bottom of the tank cover 3. The stator of the hollow shaft slip ring 21 is fixedly connected to the tank cover 3. The rotor is connected to the inner wall of the sleeve 4 through the cantilever rods 22 on both sides. The wires on the rotor are laid along one cantilever rod 22 and connected to the corresponding micro pump 20. The wires on the stator pass through the tank cover 3 and are connected to an external power source. The telescopic rod of the hydraulic cylinder 17 passes through the hollow shaft slip ring 21 and does not contact the inner wall of the hollow shaft slip ring 21. The arrangement of the inlet and outlet pipes avoids the rotational trajectories of the stirring shaft 6, scraper 7, and impeller 8, ensuring no interference during operation. This built-in design allows the micro pump 20 to rotate together with the sleeve 4, enabling it to draw liquid from the bottom from different angles and spray it upwards, forming a dynamic, dead-angle-free internal circulation that enhances the anti-sedimentation effect. Furthermore, the hollow shaft slip ring 21 and cantilever rod 22 provide the necessary power supply for the rotation of the micro pump 20.

[0027] Turbidity sensors 10 are preferably embedded at different heights near the bottom and middle of one side of the inner wall of tank 1. The specific number is determined according to the size of tank 1. These sensors are used to monitor the turbidity changes of different liquid layers in real time, thereby indirectly and accurately determining the occurrence of sedimentation. A liquid level sensor 11, which can be radar or ultrasonic, is installed on the top of the tank cover 3 to detect the liquid level in the tank in real time.

[0028] The top of the tank lid 3 is also equipped with a controller 12, such as a PLC, which is connected to the frequency conversion motor 5, the power mechanism, the turbidity sensor 10, and the liquid level sensor 11. The model can be Siemens S7-1200 series.

[0029] The working process of this utility model is as follows:

[0030] Conventional Storage and Intelligent Anti-Sedimentation: Material is injected into tank 1 through inlet 16. Controller 12 obtains the liquid level in real time based on data from level sensor 11. During static storage, controller 12 can periodically or according to a preset program start micro pump 20 to pump liquid from the bottom of the tank to the top, forming an internal small circulation, effectively delaying the formation of sediment at the bottom. Simultaneously, turbidity sensor 10 continuously monitors the liquid state. When a continuous increase in turbidity is detected, indicating that sedimentation is beginning to increase, controller 12 can determine that circulation alone is insufficient to suppress sedimentation and then initiates the next stage of operation.

[0031] Intelligent stirring and cleaning: The controller 12 automatically controls the hydraulic cylinder 17 to lower the stirring shaft 6 to the optimal stirring depth based on the liquid level. Then, the variable frequency motor 5 is activated, driving the stirring shaft 6, impeller 8, and scraper 7 to rotate together. The impeller 8 powerfully stirs the material inside the tank, breaking up any existing flocs; simultaneously, the rotating scraper 7 scrapes away any adhering substances from the tank wall, thoroughly cleaning the surface. The variable frequency motor 5 allows for speed adjustment to accommodate materials of different viscosities. After stirring is complete, the hydraulic cylinder 17 can lift the stirring assembly above the liquid level for easy reuse.

[0032] Discharge guarantee: When drainage is required, the micro pump 20 or the stirring system can be started for a short time to stir up any sediment at the bottom and mix it evenly with the liquid. Then, the valve of the outlet 15 can be opened to discharge the liquid, effectively preventing outlet blockage.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A smart liquid storage tank with an anti-sedimentation stirring structure, comprising a tank body (1), a movable support (2) installed at the bottom of the tank body (1), and a tank cover (3) with a flange bolted to the top of the tank body (1), characterized in that, A sleeve (4) is rotatably connected to the bottom of the tank cover (3). A variable frequency motor (5) that drives the sleeve (4) to rotate is installed on the top of the tank cover (3). A stirring shaft (6) is inserted through the center of the bottom of the sleeve (4). A U-shaped scraper (7) that contacts the inner wall of the tank body (1) is fixed to the bottom of the stirring shaft (6). Several pairs of torsional blades (8) are provided between the outer wall of the stirring shaft (6) and the scraper (7). A corrugated telescopic tube (9) that is fixed to the bottom of the sleeve (4) is sealed on the upper part of the stirring shaft (6). A power mechanism that drives the stirring shaft (6) to rise and fall and rotate with the sleeve (4) is installed on the top of the tank cover (3). A circulation pump mechanism that communicates with the inside of the tank body (1) is installed inside the sleeve (4). A turbidity sensor (10) is embedded on one side of the inner wall of the tank body (1). A liquid level sensor (11) and a controller (12) connected to the variable frequency motor (5), the power mechanism, the turbidity sensor (10), and the liquid level sensor (11) are installed on the top of the tank cover (3).

2. The intelligent liquid storage tank with an anti-sedimentation stirring structure according to claim 1, characterized in that, The top of the inner wall of the sleeve (4) is provided with an internal gear ring (13), and the main shaft of the variable frequency motor (5) passes through the sleeve (4) and is fixedly connected with a gear (14) that meshes with the internal gear ring (13).

3. The intelligent liquid storage tank with an anti-sedimentation stirring structure according to claim 1, characterized in that, The tank (1) has a liquid outlet (15) with a valve at the bottom and a liquid inlet (16) with a valve at the top of one side.

4. The intelligent liquid storage tank with an anti-sedimentation stirring structure according to claim 1, characterized in that, The power mechanism includes a hydraulic cylinder (17) installed on the top of the tank cover (3), a spline sleeve (18) fixed to the center of the bottom of the sleeve (4), and a stirring shaft (6) inside the corrugated telescopic tube (9) with spline teeth that mesh with the spline sleeve (18) on the outer wall. The stirring shaft (6) passes through the spline sleeve (18) and is rotatably connected to the telescopic rod of the hydraulic cylinder (17) that extends into the sleeve (4).

5. The intelligent liquid storage tank with an anti-sedimentation stirring structure according to claim 4, characterized in that, The circulating pump mechanism includes a bracket (19) installed on one side of the inner wall of the sleeve (4) and a micro pump (20) installed on the bracket (19). The water inlet pipe of the micro pump (20) is sealed through the sleeve (4) and located at the bottom of the tank (1). The water outlet pipe is sealed through the sleeve (4) and located at the upper part of the tank (1). The water inlet pipe and the water outlet pipe do not interfere with the stirring shaft (6), scraper (7), and blade (8). A hollow shaft slip ring (21) is provided at the center of the bottom of the tank cover (3). The stator of the hollow shaft slip ring (21) is fixedly connected to the tank cover (3). The rotor is connected to the inner wall of the sleeve (4) through the cantilever rods (22) on both sides. The wires on the rotor are laid along one cantilever rod (22) and connected to the corresponding micro pump (20). The wires on the stator pass through the tank cover (3) and are connected to the external power supply. The telescopic rod of the hydraulic cylinder (17) passes through the hollow shaft slip ring (21) and does not contact the inner wall of the hollow shaft slip ring (21).

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