Dewar tank capable of being intelligently cleaned and disinfected and cleaning and disinfecting method thereof

Abstract

According to the Dewar tank capable of being intelligently cleaned and disinfected and the cleaning and disinfecting method of the Dewar tank, integrated intelligent operation is achieved by integrating a cleaning cover with multiple assemblies, mounting and dismounting are convenient and fast, and complex manual intervention is not needed. Inclined alternate nozzles of the flushing assembly are matched with reciprocating rotation and lifting actions, so that the inner wall of the Dewar tank can be fully covered, and no cleaning and disinfection dead angle is ensured; and the rotating and lifting actions are coordinated and linked, so that the cleaning uniformity and thoroughness are improved. The detection assembly monitors waste liquid pollution residues in real time, the cleaning process is precisely controlled in combination with the controller, and it is guaranteed that the disinfection effect reaches the standard. The waste liquid treatment assembly carries out centralized treatment on waste disinfectants, and environmental pollution is avoided. And sterile nitrogen is introduced into the air drying assembly, so that secondary pollution caused by residual water on the inner wall is effectively avoided, and the subsequent use cleanliness of the Dewar tank is guaranteed. Through cooperation of all the components, automation of the whole process of cleaning, disinfection, detection, air drying and waste liquid treatment is achieved, the labor cost is reduced, and the efficiency and reliability of Dewar tank cleaning and disinfection are improved.

Description

Technical Field

[0001] This invention relates to the field of Dewar jar technology, and in particular to a Dewar jar capable of intelligent cleaning and disinfection, and a cleaning and disinfection method thereof. Background Technology

[0002] In biosafety laboratories and research institutions, Dewar flasks are commonly used to store high-risk samples such as highly pathogenic pathogens, toxic chemical reagents, and radioactive biological agents. Residual contamination from these samples not only affects the safety and accuracy of subsequent sample storage but also poses risks to operator exposure and environmental hazards. Therefore, cleaning and disinfecting Dewar flasks after use is crucial for ensuring their safe reuse. Currently, cleaning Dewar flasks is still primarily done manually. This involves first emptying the cryogenic medium from the flask and allowing it to cool to room temperature before manually wiping or rinsing it with cleaning agents. This process is cumbersome and inefficient. Due to the lack of dedicated cleaning equipment, manual cleaning often results in incomplete cleaning, leaving residual samples in hidden areas such as crevices in the inner wall and valve components, leading to cross-contamination between different batches of samples. Furthermore, using inappropriate tools or cleaning agents during manual cleaning can scratch the inner wall of the flask, damage the sealing structure or insulation layer, affecting the cryogenic preservation performance and lifespan of the Dewar flask.

[0003] Furthermore, the cleaning waste liquid from high-risk samples contains toxic and harmful substances or pathogenic microorganisms. Existing cleaning methods lack corresponding closed-loop treatment mechanisms, and the waste liquid can easily be directly discharged or disposed of arbitrarily, which does not comply with relevant regulations for hazardous waste treatment and poses a risk of secondary pollution. In addition, existing technologies lack effective means to verify the cleaning effect, making it impossible to accurately determine whether the residual pollutants in the tank meet the standards. Relying solely on human experience for judgment can easily lead to situations where the cleaning does not meet the standards but is still put into use, further amplifying safety hazards.

[0004] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a Dewar jar that can be intelligently cleaned and disinfected, and a cleaning and disinfection method thereof, in order to solve the technical problems that manual cleaning in the prior art is prone to incomplete cleaning and scratching of the inner wall of the jar.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A Dewar jar capable of intelligent cleaning and disinfection, comprising: The cleaning lid is detachably installed on the mouth of the Dewar jar, and a fixing bracket is fixedly installed on its top; The rinsing assembly includes a rotating tube, an annular spray tube, several first nozzles, and several second nozzles. The upper end of the rotating tube is connected to an external disinfectant supply device through an inlet pipe, and its lower end is connected to the center of the annular spray tube. Several first nozzles and several second nozzles are alternately arranged around the center of the annular spray tube on the outside of the annular spray tube. The spray nozzles of the first nozzles are inclined upward from the horizontal direction, and the spray nozzles of the second nozzles are inclined downward from the horizontal direction. The first nozzles and second nozzles are used to spray disinfectant onto the inner wall of the Dewar can for rinsing and disinfection. The lifting assembly includes a cylinder and a movable frame. The cylinder is mounted on a fixed frame and drives the movable frame. The movable frame is movably connected to the fixed frame and moves vertically under the drive of the cylinder. The rotating tube is mounted on the movable frame and rotates around its own axis, and can move up and down with the movable frame. The rotating assembly includes a motor, a synchronous belt, a first synchronous pulley, a second synchronous pulley, and a bushing. The motor is mounted on the cleaning cover and drives the first synchronous pulley. The first synchronous pulley is connected to the second synchronous pulley via the synchronous belt. One end of the bushing is fixedly connected to the second synchronous pulley. The bushing is rotatably mounted on the cleaning cover via a first bearing. The rotating tube passes through the second synchronous pulley and the bushing from top to bottom and can move back and forth relative to the bushing. The motor is used to drive the rotating tube to rotate back and forth 90° around its own axis, thereby driving the annular spray tube to rotate back and forth 90°. The air-drying assembly includes a miniature air pump connected to an external sterile nitrogen supply device and mounted on a cleaning cover for air-drying the inner wall of the Dewar jar after cleaning and disinfection. The waste liquid treatment component includes a drain pipe and a waste liquid treatment tank. One end of the drain pipe is connected to the drain port at the bottom of the Dewar tank, and the other end is connected to the waste liquid treatment tank. The waste liquid treatment tank is used to collect the waste disinfectant generated during the cleaning of the inner wall of the Dewar tank and to treat it accordingly. The detection component includes a detection sensor installed on the drain pipe to detect the waste liquid flowing in the drain pipe in real time, which is used to detect the residual concentration of pollutants in the waste liquid to determine whether the inside of the Dewar tank has been thoroughly cleaned and disinfected. The controller is connected to each component and is used to control the start and stop of each component.

[0007] The intelligently cleanable and disinfectable Dewar jar has a first nozzle whose spray port axis is tilted upward at 30° relative to the horizontal line, and a second nozzle whose spray port axis is tilted downward at 30° relative to the horizontal line.

[0008] The aforementioned intelligent cleaning and disinfection Dewar jar includes a fixing frame comprising a top plate and four support columns. The top plate is fixedly connected to the top of the cleaning cover via the four support columns. A cylinder is fixedly installed on the top plate, and its telescopic rod passes through the top plate.

[0009] The aforementioned intelligently cleanable and disinfectable Dewar jar includes a movable frame comprising an upper plate, a lower plate, and four connecting rods. The end of the telescopic rod of the cylinder is fixedly connected to the upper plate. The upper plate is provided with four first guide holes corresponding to the four support columns. The first guide holes are used to movably accommodate the support columns. The upper plate and the lower plate are fixedly connected by the four connecting rods. The upper end of the rotating tube is rotatably connected to the upper plate through a second bearing, and the lower end of the rotating tube is rotatably connected to the lower plate through another second bearing.

[0010] The intelligent cleaning and disinfection Dewar jar has a cleaning cover with four second guide holes, each corresponding to a connecting rod. The connecting rods are movably accommodated in the second guide holes and pass through the cleaning cover, which is located between the upper and lower plates.

[0011] The intelligent cleaning and disinfection Dewar jar is provided with a spline on the outer wall of the rotating tube, and a third guide hole is provided on both the bushing and the second synchronous wheel. The third guide hole passes through the second synchronous wheel and the bushing along the axis of the bushing. A keyway is provided on the inner wall of the third guide hole. The cooperation between the spline and the keyway allows the rotating tube to move up and down along its axis in the third guide hole while reciprocating 90° around its axis.

[0012] The intelligently cleanable and disinfectable Dewar jar has a first through hole and a second through hole through its top plate along its thickness direction. The first through hole is used for the liquid inlet pipe connecting the external disinfectant supply equipment and the rotating tube to pass through, and the second through hole is used for the air pipe connecting the micro air pump and the external sterile nitrogen supply equipment to pass through.

[0013] The intelligent cleaning and disinfection Dewar jar has a first clearance hole and a second clearance hole through the upper plate along its thickness direction. The first clearance hole is set to the motor on the cleaning cover to prevent the upper plate from interfering with the motor when the movable frame moves down. The second clearance hole is set to the micro air pump on the cleaning cover to prevent the upper plate from interfering with the micro air pump when the movable frame moves down.

[0014] The intelligently cleanable and disinfectable Dewar jar includes a waste liquid treatment component that further includes a control valve. The drain pipe is connected to the drain port through the control valve to control the start and stop of waste liquid discharge.

[0015] A method for intelligent cleaning and disinfection of Dewar jars, based on the intelligently cleanable and disinfectable Dewar jars described above, includes the following steps: Drain the cryogenic medium from the Dewar canister, remove the original sealing cap, and install the cleaning cap onto the mouth of the Dewar canister, so that the lower end of the flushing assembly extends into the Dewar canister from the mouth. When the flushing assembly is activated, the first and second nozzles spray and flush the inner wall of the Dewar jar. The rotating assembly is activated, which drives the annular spray pipe to rotate 90° around the rotating pipe, so that the water jets from the first and second nozzles flush the inner wall of the Dewar jar from left to right. At the same time, the lifting assembly drives the flushing assembly to descend along the axis of the rotating pipe, so that the water jets flush the inner wall of the Dewar jar from top to bottom. The waste liquid generated during rinsing enters the drain pipe through the drain outlet and flows into the waste liquid treatment tank through the drain pipe. The detection component detects the residual concentration of pollutants in the continuously flowing waste liquid in the drain pipe until the detection value is lower than the preset qualified value; The controller stops the rinsing component from spraying disinfectant, the rotating component stops working, the lifting component drives the rinsing component to rise and reset before stopping, and the drying component injects sterile nitrogen into the Dewar can for drying. After the inside of the Dewar jar is completely air-dried, close the control valve, remove the cleaning cap, and replace the original sealing cap, then wait for it to be used.

[0016] Beneficial effects: This invention provides a Dewar jar capable of intelligent cleaning and disinfection, including a cleaning lid and integrated rinsing, lifting, rotating, and drying components. It also includes a waste liquid treatment component and a detection component connected to the bottom of the Dewar jar. This intelligently cleanable and disinfectable Dewar jar and its cleaning and disinfection method achieve integrated intelligent operation through the integration of multiple components on the cleaning lid, allowing for convenient installation and disassembly without complex manual intervention. The rinsing component's tilting, alternating nozzles, combined with reciprocating rotation and lifting movements, can comprehensively cover the inner wall of the Dewar jar, ensuring thorough cleaning and disinfection. The coordinated rotation and lifting movements enhance the uniformity and thoroughness of cleaning. The detection component monitors residual waste liquid in real time, and combined with a controller, precisely controls the cleaning process to ensure disinfection effectiveness. The waste liquid treatment component centrally treats waste disinfectant, avoiding environmental pollution and meeting environmental protection requirements. The drying component introduces sterile nitrogen gas, effectively preventing secondary pollution caused by residual moisture on the inner wall and ensuring the cleanliness of the Dewar jar for subsequent use. The overall design achieves full automation of the cleaning, disinfection, testing, drying, and waste liquid treatment process through the coordinated operation of various components. This simplifies the operation process, reduces labor costs, and improves the efficiency and reliability of Dewar jar cleaning and disinfection, providing a strong guarantee for the safe and repeated use of Dewar jars. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the Dewar jar provided by the present invention; Figure 2 This is an exploded structural diagram of the lifting assembly, rotating assembly, rinsing assembly, drying assembly, and cleaning cover provided by the present invention. Figure 3A cross-sectional structural diagram of the lifting assembly, rotating assembly, rinsing assembly, and cleaning cover provided by the present invention; Figure 4 This is a three-dimensional structural diagram of the Dewar jar provided by the present invention.

[0018] Figure label: 1—Dewar jar 2—Cleaning lid 3—Rinsing assembly 4—Lifting assembly; 5—Rotation assembly; 6—Drying assembly 7—Waste liquid treatment component; 8—Detection component; 11—Drain outlet 21—Fixed bracket; 22—Second guide hole; 31—Rotating tube 32—Annular spray pipe; 33—First nozzle; 34—Second nozzle 35—Inlet pipe; 36—Horizontal pipe; 37—Third nozzle 38—Second bearing; 41—Cylinder; 42—Modular frame 51—Motor 52—Synchronous belt 53—First synchronous pulley 54—Second Synchronizing Pulley; 55—Shaft Sleeve; 56—First Bearing 61—Miniature air pump; 62—Air hose; 71—Drainage hose 72—Waste liquid treatment tank; 73—Control valve; 81—Detection sensor 211—Top plate; 212—Support column; 311—Spline section 411—Telescopic pole; 421—Upper plate; 422—Lower plate 423—Connecting rod; 551—Third guide hole; 552—Keyway 2111—First through hole; 2112—Second through hole; 4211—First guide hole 4212—First clearance hole; 4213—Second clearance hole. Detailed Implementation

[0019] This invention provides a Dewar jar capable of intelligent cleaning and disinfection, and a cleaning and disinfection method thereof. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0020] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0021] Please see Figures 1 to 4 As shown, the present invention provides a Dewar jar capable of intelligent cleaning and disinfection, comprising: The cleaning cover 2 is detachably installed on the mouth of the Dewar jar 1, and a fixing bracket 21 is fixedly installed on its top. In this embodiment, the cleaning cover 2 is a circular stainless steel cover that matches the mouth of the Dewar jar 1. The fixing bracket 21 is also made of stainless steel and is fixed to the top surface of the cleaning cover 2 by welding. The cleaning cover 2 integrates multiple components to achieve integrated intelligent operation, and is easy to install and disassemble without complicated manual intervention.

[0022] The rinsing assembly 3 includes a rotating pipe 31, an annular spray pipe 32, a plurality of first nozzles 33, and a plurality of second nozzles 34. The upper end of the rotating pipe 31 is connected to an external disinfectant supply device via an inlet pipe 35, and its lower end is connected to the center of the annular spray pipe 32. The plurality of first nozzles 33 and the plurality of second nozzles 34 are alternately arranged around the center of the annular spray pipe 32 on the outer side of the annular spray pipe 32. The spray nozzles of the first nozzles 33 are inclined upward from the horizontal direction, and the spray nozzles of the second nozzles 34 are inclined downward from the horizontal direction. The first nozzles 33 and the second nozzles 34 are used to spray disinfectant onto the inner wall of the Dewar jar 1 for rinsing and disinfection. In this embodiment... In this system, both the annular spray pipe 32 and the rotating pipe 31 are made of 304 stainless steel. At least one horizontal pipe 35 is installed through the center of the annular spray pipe 32. The lower end of the rotating pipe 31 is connected to the horizontal pipe 36 via a T-connector. The inlet pipe 35 is a corrosion-resistant PU flexible hose, connected to the output interface of an external disinfectant supply device via a quick connector. The first nozzle 33 and the second nozzle 34 are both high-pressure atomizing nozzles, with four nozzles in each category. They are evenly spaced at 45° intervals around the axis of the annular spray pipe 32, covering a spray angle of 13°-114°. The spray nozzles of the first nozzle 33 and the second nozzle 34 are alternately tilted to increase the rinsing range in the vertical direction. The water pressure can be adjusted in stages between 0.3-0.8 MPa via a PLC system, activating a high-pressure pulse mode for hidden areas such as the inner wall crevices of the Dewar jar 1 or for areas with strong residual contaminants. The disinfectant is a low-temperature stable hydrogen peroxide compound disinfectant that conforms to the ASTM E2315-2016 standard. Nano silica stabilizers are added to prevent crystallization and stratification in the range of -196℃ to room temperature. It also passes the ISO 15883-1:2006 material compatibility test and has no corrosive effect on the titanium alloy inner liner and PTFE lining.

[0023] The lifting assembly 4 includes a cylinder 41 and a movable frame 42. The cylinder 41 is mounted on the fixed frame 21 and drives the movable frame 42. The movable frame 42 is movably connected to the fixed frame 21 and moves vertically under the drive of the cylinder 41. The rotating tube 31 is mounted on the movable frame 42 around its own axis and can move up and down with the movable frame 42. In this embodiment, the cylinder 41 is a standard cylinder 41 with a retractable piston rod. Its cylinder body is detachably fixed to the upper surface of the top plate 211 of the fixed frame 21 by bolts. The end of the telescopic rod 411 of the cylinder 41 is fixedly connected to the upper plate 421 of the movable frame 42 by a flange. The movable frame 42 is supported by stainless steel. The lower end of the movable frame 42 penetrates the cleaning cover 2 along the thickness direction and can move up and down relative to the cleaning cover 2 to drive the rinsing assembly 3 to move up and down, thereby improving the cleaning degree of the rinsing assembly 3 on the inner wall of the Dewar jar 1. To improve the lifting stability of the movable frame 42, two cylinders 41 are used, symmetrically arranged with the center of the top plate 211 of the fixed frame 21 as the point. When the cylinders 41 are working, the controller controls the air intake to adjust the extension speed of the telescopic rod 411, thereby driving the movable frame 42 and the rotating pipe 31 to rise and fall smoothly in the vertical direction. The lifting stroke is preset according to the height of the Dewar jar 1, ensuring that the annular spray pipe 32 can cover the entire area of ​​the inner wall of the Dewar jar 1 from top to bottom.

[0024] The rotating assembly 5 includes a motor 51, a synchronous belt 52, a first synchronous pulley 53, a second synchronous pulley 54, and a bushing 55. The motor 51 is mounted on the cleaning cover 2 and drives the first synchronous pulley 53. The first synchronous pulley 53 is connected to the second synchronous pulley 54 via the synchronous belt 52. One end of the bushing 55 is fixedly connected to the second synchronous pulley 54. The bushing 55 is rotatably mounted on the cleaning cover 2 via a first bearing 56. The rotating tube 31 passes through the second synchronous pulley 54 and the bushing 55 from top to bottom and can move back and forth relative to the bushing 55. The motor 51 is used to drive the rotating tube 31 to rotate back and forth 90° around its own axis, so as to drive the annular spray tube 32 to rotate back and forth 90°. In this embodiment, the motor 51 is a stepper motor 51, and its body is fixedly mounted on the mounting bracket on the top of the cleaning cover 2 by screws. The output shaft of the motor 51 is fixedly connected to the first synchronous pulley 53 by a flat key to ensure stable torque transmission. The first synchronous pulley 53 and the second synchronous pulley 54 are identical in specifications, both being synchronous belt pulleys 52. The synchronous belt 52 is made of polyurethane and has anti-slip teeth on its surface, meshing with the tooth grooves of the synchronous pulleys for high transmission efficiency and no slippage. The bushing 55 is made of alloy steel, with one end fixedly connected to the center hole of the second synchronous pulley 54 by welding. The other end of the bushing 55 is rotatably mounted in the pre-set mounting hole at the center of the cleaning cover 2 via the first bearing 56. The first bearing 56 is a deep groove ball bearing, with the outer ring of the bearing interference fit with the mounting hole and the inner ring interference fit with the bushing 55, ensuring smooth rotation of the bushing 55.

[0025] The air-drying component 6 includes a miniature air pump 61, which is connected to an external sterile nitrogen supply device and is installed on the cleaning cover 2. It is used to air-dry the inner wall of the Dewar jar 1 after cleaning and disinfection. In this embodiment, the miniature air pump 61 of the air-drying device is a 500W oil-free silent vacuum pump, and its air inlet is connected to an external sterile nitrogen cylinder through an air pipe 62.

[0026] The waste liquid treatment component 7 includes a drain pipe 71 and a waste liquid treatment tank 72. One end of the drain pipe 71 is connected to the drain port 11 provided at the bottom of the Dewar jar 1, and the other end is connected to the waste liquid treatment tank 72. The waste liquid treatment tank 72 is used to collect the waste disinfectant generated during the cleaning of the inner wall of the Dewar jar 1 and to treat it accordingly. In this embodiment, the waste liquid treatment tank 72 is made of PP material, and the drain pipe 71 is made of PTFE corrosion-resistant pipe.

[0027] The detection component 8 includes a detection sensor 81, which is installed in the drain pipe 71 and performs real-time detection on the waste liquid flowing in the drain pipe 71. The sensor is used to detect the residual concentration of pollutants in the waste liquid to determine whether the inside of the Dewar jar 1 has been thoroughly cleaned and disinfected. In this embodiment, the detection sensor 81 includes, but is not limited to, a turbidity sensor and an electrochemical pollutant sensor, which can be adaptively selected according to the type of sample loaded in the Dewar jar 1 before cleaning.

[0028] The controller (not shown in the figure) is connected to each component and is used to control the start and stop of each component. In this embodiment, the controller is a PLC controller (model S7-200), which is integrated into the control box on the top of the mounting bracket 21. It is electrically connected to the solenoid valve of the rinsing component 3, the start / stop switch of the micro air pump 61, the motor 51, the cylinder 41, and the detection sensor 81 of the detection component 8 through wires. The control box is equipped with a touch screen for parameter setting, such as spray pressure and detection threshold.

[0029] Please see Figure 2As shown, the spray axis of the first nozzle 33 is inclined upwards at 30° relative to the horizontal line, and the spray axis of the second nozzle 34 is inclined downwards at 30° relative to the horizontal line. In this embodiment, both the first nozzle 33 and the second nozzle 34 are fixed to the outside of the annular spray pipe 32 by a detachable threaded connection. The spray nozzle adopts a fan-shaped spray structure with a fan-shaped unfolding angle of 60°. The installation distance between adjacent first nozzles 33 and second nozzles 34 is adapted to the fan-shaped angle to ensure that the spray range of adjacent nozzles forms an overlapping area and avoids blind spots in rinsing. Among them, the design of the spray axis of the first nozzle 33 being inclined upwards at 30° relative to the horizontal line can accurately cover the upper area of ​​the inner wall of the Dewar jar 1 and the side wall below the jar opening, especially for directional rinsing of the dead corners on the upper part of the inner wall of the jar where pollutants are easily retained. The spray axis of the second nozzle 34 being inclined downwards at 30° relative to the horizontal line can directly reach the lower area of ​​the inner wall of the jar and the side wall near the bottom of the jar, which is suitable for the rinsing requirements of the arc transition structure at the bottom of the Dewar jar 1. To flush the bottom wall inside the Dewar jar 1, a third nozzle 37 is installed on the lower side of the horizontal tube 36. The nozzle 37 is set vertically downwards and is the same type as the first nozzle 33.

[0030] The tilted angle design, combined with the 90° reciprocating rotation of the annular spray pipe 32 and the vertical lifting action of the lifting component 4, creates a synergistic effect. This allows the two tilted water jets to form a three-dimensional, intersecting rinsing trajectory on the inner wall of the tank. This avoids the problem of insufficient coverage of the upper and lower parts of the tank caused by a single horizontal spray, and the 30° tilt angle gives the water jets stronger impact potential energy, effectively removing stubborn contaminants adhering to the inner wall. At the same time, the symmetrical tilt angle allows the disinfectant to evenly cover the entire side wall of the tank during spraying, achieving full-area coverage, improving the uniformity and thoroughness of cleaning and disinfection, reducing disinfectant consumption, shortening cleaning time, and further ensuring the cleanliness of the inner wall of the Dewar tank 1 and the safety of subsequent use.

[0031] Please see Figures 1 to 3As shown, the fixing frame 21 includes a top plate 211 and four support columns 212. The top plate 211 is fixedly connected to the top of the cleaning cover 2 through the four support columns 212. The cylinder 41 is fixedly installed on the top plate 211, and its telescopic rod 411 passes through the top plate 211. In this embodiment, the top plate 211 and the four support columns 212 of the fixing frame 21 are all made of high-strength stainless steel. The top plate 211 has a circular structure, and its diameter is adapted to the top diameter of the cleaning cover 2. The four support columns 212 are fixed to the bottom surface of the top plate 211 by welding and are distributed in a rectangular array. The lower end of the support column 212 is fixed to the top surface of the cleaning cover 2 by bolts. The top plate 211 is provided with a movable hole for the telescopic rod 411 of the cylinder 41 to move. A copper guide sleeve is embedded in the inner wall of the movable hole. The guide sleeve and the telescopic rod 411 are in clearance fit, which not only provides precise guidance for the telescopic movement of the telescopic rod 411, but also reduces the wear caused by long-term reciprocating motion and improves the service life of the cylinder 41.

[0032] Please see Figures 1 to 3 As shown, the movable frame 42 includes an upper plate 421, a lower plate 422, and four connecting rods 423. The end of the telescopic rod 411 of the cylinder 41 is fixedly connected to the upper plate 421. The upper plate 421 is provided with four first guide holes 4211 corresponding to the four support columns 212. The first guide holes 4211 are used to movably accommodate the support columns 212. The upper plate 421 and the lower plate 422 are fixedly connected by the four connecting rods 423. The upper end of the rotating tube 31 is rotatably connected to the upper plate 421 through a second bearing 38, and the lower end of the rotating tube 31 is rotatably connected to the lower plate 422 through another second bearing 38. In this embodiment, the four connecting rods 423 of the movable frame 42 are made of stainless steel and welded between the upper plate 421 and the lower plate 422 in a rectangular array. The diameter of the upper plate 421 is the same as the diameter of the top plate 211, and the diameter of the lower plate 422 is smaller than the inner diameter of the mouth of the Dewar jar 1. The four support columns 212 of the fixed frame 21 pass through the first guide hole 4211 of the upper plate 421 of the movable frame 42. The support columns 212 and the first guide hole 4211 are fitted with clearance to ensure the guiding accuracy of the movable frame 42 when it is raised and lowered, and to avoid jamming.

[0033] Please see Figure 2 As shown, the cleaning cover 2 is provided with four second guide holes 22, and the four second guide holes 22 are correspondingly arranged with four connecting rods 423. The connecting rods 423 are movably accommodated in the second guide holes 22 and pass through the cleaning cover 2. The cleaning cover 2 is located between the upper plate 421 and the lower plate 422. In this embodiment, the outer diameter of the connecting rod 423 is adapted to the inner diameter of the second guide hole 22 of the cleaning cover 2, and an oil-free bushing is embedded in the inner wall of the second guide hole 22 to minimize the frictional resistance when the connecting rod 423 moves up and down along the second guide hole 22.

[0034] Please see Figure 2As shown, the outer wall of the rotating tube 31 is provided with a spline portion 311, and both the bushing 55 and the second synchronous pulley 54 are provided with a third guide hole 551. The third guide hole 551 passes through the second synchronous pulley 54 and the bushing 55 along the axis of the bushing 55. The inner wall of the third guide hole 551 is provided with a keyway 552. The cooperation between the spline portion 311 and the keyway 552 allows the rotating tube 31 to move up and down along its axis within the third guide hole 551 while simultaneously rotating 90° around its axis. The spline portion 311 on the outer wall of the rotating tube 31 adopts a rectangular spline structure with a total of 4 teeth. The length of the spline portion 311 along the axial direction of the rotating tube 31 is longer than the maximum lifting stroke of the rotating tube 31, ensuring that the spline portion 311 always maintains effective engagement with the keyway 552 during the entire lifting stroke of the rotating tube 31, preventing disengagement from the transmission. The third guide hole 551, integrally formed by the bushing 55 and the second synchronous pulley 54, has a keyway 552 on its inner wall that perfectly matches the tooth profile and number of teeth of the spline portion 311. This ensures the stability of torque transmission and provides ample space for the vertical movement of the rotating tube 31. The spline portion 311 is machined using a roll forming process, and the keyway 552 is machined by wire cutting. Both the spline portion 311 and the keyway 552 are hard chrome plated to improve wear resistance and corrosion resistance.

[0035] Please see Figure 2 As shown, the top plate 211 has a first through hole 2111 and a second through hole 2112 extending through its thickness. The first through hole 2111 is used for the liquid inlet pipe 35 connecting the external disinfectant supply equipment and the rotating tube 31 to pass through, and the second through hole 2112 is used for the air pipe 62 connecting the micro air pump 61 and the external sterile nitrogen supply equipment to pass through. In this embodiment, the diameter of the first through hole 2111 is larger than the outer diameter of the liquid inlet pipe 35 and is located directly above the rotating tube 31; the diameter of the second through hole 2112 is larger than the outer diameter of the air pipe 62 and is located directly above the micro air pump 61. The walls of both through holes are machined with chamfers at a 45° angle, and the edges are smooth and burr-free to prevent the pipes from being scratched by sharp edges during installation and to reduce frictional losses when the pipes are bent. The liquid inlet pipe 35 needs to move within the first through hole 2111 as the rotating tube 31 moves up and down, therefore an oil-free bushing needs to be installed on the inner wall of the first through hole 2111.

[0036] Please see Figure 2As shown, the upper plate 421 has a first clearance hole 4212 and a second clearance hole 4213 extending through it along its thickness direction. The first clearance hole 4212 corresponds to the motor 51 on the cleaning cover 2, and is used to prevent the upper plate 421 from interfering with the motor 51 when the movable frame 42 moves down. The second clearance hole 4213 corresponds to the miniature air pump 61 on the cleaning cover 2, and is used to prevent the upper plate 421 from interfering with the miniature air pump 61 when the movable frame 42 moves down. In this embodiment, both the first clearance hole 4212 and the second clearance hole 4213 are through holes. The shape of the first clearance hole 4212 is adapted to the outer contour of the motor 51, and the lateral dimension of the hole is slightly larger than the maximum outer dimension of the motor 51. The shape of the second clearance hole 4213 is adapted to the outer contour of the miniature air pump 61, and the lateral dimension of the hole is slightly larger than the maximum outer dimension of the miniature air pump 61. When the movable frame 42 is lowered to its lowest stroke, the upper structure of the motor 51 and the micro air pump 61 can pass through the clearance hole to form all-round space clearance.

[0037] Please see Figure 1 and Figure 4 As shown, the waste liquid treatment assembly 7 also includes a control valve 73. The drain pipe 71 is connected to the drain port 11 through the control valve 73 to control the start and stop of waste liquid discharge. In this embodiment, the control valve 73 is a DN32 electromagnetic ball valve. Its input end is threaded to the drain port 11, and its output end is welded and fixed to one end of the drain pipe 71. The detection sensor 81 is fixed to the side of the drain pipe 71 near the electromagnetic ball valve by a clamp, 10cm away from the ball valve outlet. The probe of the detection sensor 81 extends into the drain pipe 71 and is in direct contact with the waste liquid.

[0038] A method for intelligent cleaning and disinfection of a Dewar jar, based on the intelligently cleanable and disinfectable Dewar jar described above, includes the following steps: After completely emptying the low-temperature medium from the Dewar jar 1, let it stand until the internal temperature returns to room temperature to avoid the low temperature affecting the cleaning components. Then, remove the original sealing cap from the jar opening, clean the impurities and residual medium from the edge of the jar opening, install the cleaning cap 2 onto the jar opening of the Dewar jar 1, and fix it with bolts to ensure that the cleaning cap 2 is stable and reliable, preventing disinfectant from splashing during rinsing. At the same time, extend the annular spray pipe 32 of the rinsing component 3 from the jar opening into the preset initial position inside the Dewar jar 1. This position is close to the bottom of the jar opening and does not contact the jar wall.

[0039] The flushing assembly 3 is activated by the controller. The external disinfectant supply equipment delivers disinfectant to the rotating pipe 31 at a preset pressure. After being distributed by the annular spray pipe 32, the first nozzle 33 and the second nozzle 34 spray the inner wall of the Dewar jar 1 in a fan-shaped spray pattern. At the same time, the rotating assembly 5 is activated. The motor 51 rotates forward and backward at a preset frequency. Through the synchronous belt 52, it drives the annular spray pipe 32 to rotate 90° around the rotating pipe 31. This causes the water flow from the first nozzle 33 and the second nozzle 34 to form a left-right oscillating flushing trajectory, flushing the inner wall of the Dewar jar 1. Meanwhile, the cylinder 41 of the lifting assembly 4 drives the movable frame 42 at a uniform speed to lower the flushing assembly 3 along the axial direction of the rotating pipe 31. The descent speed is matched with the rotation frequency to ensure that the water flow evenly covers the inner wall of the Dewar jar 1 from top to bottom, achieving three-dimensional cross-flushing.

[0040] The waste liquid generated during rinsing collects at the bottom of the Dewar tank 1 under gravity. Simultaneously, the controller opens the control valve 73 on the drain pipe 71. The waste liquid enters the drain pipe 71 through the drain port 11 and flows into the waste liquid treatment tank 72 through the drain pipe 71, thus preventing the waste liquid from overflowing and causing pollution.

[0041] The detection component 8 performs real-time continuous detection of pollutant residual concentration in the waste liquid flowing in the drain pipe 71. The detection data is transmitted to the controller in real time. The controller compares the detection value with the preset qualified value (set according to industry hygiene standards). If the detection value is higher than the qualified value, the controller instructs the flushing component 3, the rotating component 5 and the lifting component 4 to continue working. The controller determines that the cleaning and disinfection has met the standards until the detection value is stably lower than the preset qualified value.

[0042] The controller then issues a command to shut off the disinfectant supply equipment, and the rinsing component 3 stops spraying disinfectant; the rotating component 5 stops working, and the annular spray pipe 32 returns to its initial angle; the lifting component 4 drives the rinsing component 3 to rise to its initial position and then stops operating; then the drying component 6 is started, and the micro air pump 61 introduces sterile nitrogen from the outside into the Dewar canister 1 at a preset flow rate. The nitrogen forms a flowing airflow inside the canister, carrying away the disinfectant and moisture remaining on the inner wall until the canister reaches the preset drying standard.

[0043] After the inside of Dewar 1 is thoroughly dried, the controller shuts off the micro air pump 61 and control valve 73, slowly loosens the connecting bolts between the cleaning cover 2 and the can opening, removes the cleaning cover 2 and cleans its surface residue; then the original sealing cover is installed back into the can opening, and the sealing performance of the sealing cover is checked to ensure that there is no loosening or leakage. Dewar 1 has completed the cleaning and disinfection process and is ready for subsequent use.

[0044] This cleaning and disinfection method utilizes specialized equipment to achieve fully automated operation, eliminating the need for complex manual intervention and significantly reducing labor intensity and operational difficulty. Through the coordinated action of the three-dimensional spraying of the rinsing component 3, the reciprocating swing of the rotating component 5, and the uniform descent of the lifting component 4, combined with the upwardly and downwardly angled nozzle design, the inner wall of the Dewar jar 1 is thoroughly cleaned without any blind spots, effectively removing stubborn residual contaminants. Real-time closed-loop monitoring by the detection component 8 ensures that the cleaning and disinfection effect meets standards, avoiding subjective errors from manual judgment. Centralized collection and treatment of waste liquid complies with environmental protection requirements, eliminating the risk of environmental pollution; the aseptic nitrogen drying process avoids secondary pollution caused by residual moisture on the inner wall, ensuring the cleanliness and safety of the Dewar jar 1 for subsequent use.

[0045] The intelligent cleaning and disinfection method for the Dewar jar 1 further includes the following steps: According to the actual application of Dewar 1, such as if Dewar 1 has stored low-temperature media with high viscosity or serious pollution, the controller can set the soaking program: control the rinsing component 3 to spray disinfectant until it fills the inside of Dewar 1, and then control the rinsing component 3 to stop spraying, so that the disinfectant soaks in the inside of Dewar 1 for a preset time. After soaking, the controller opens the control valve 73, and the waste liquid is discharged into the waste liquid treatment tank 72 through the drain pipe 71; The detection component 8 simultaneously detects the residual concentration of pollutants in the waste liquid. If the detection result does not meet the qualified standard, the flushing component 3 is activated to perform a secondary flush. The spray pressure and nozzle working status of the secondary flush are the same as those of the initial flush. During the rinsing process, the detection component 8 continuously monitors the residual concentration of pollutants in the waste liquid until the test results meet the qualified standards, at which point the rinsing component 3 is controlled to stop working. The air-drying component 6 performs air-drying treatment on the inside of the Dewar jar 1.

[0046] The intelligent cleaning and disinfection method for the Dewar jar 1 further includes the following steps: After the Dewar tank 1 is cleaned and disinfected, different types of waste liquid are treated in the waste liquid treatment tank 72 until the waste liquid meets the national or industry emission standards before being discharged.

[0047] The disinfection waste liquid after rinsing is introduced into an external corrosion-resistant waste liquid treatment tank 72 through a steel-lined PTFE pipeline. The tank is equipped with a high-precision pH meter to monitor the acidity and alkalinity of the waste liquid in real time, and automatically adds lime or sodium hydroxide neutralizing agent to adjust the pH value to the standard range of 6-9.

[0048] Optimized treatment processes for different types of waste liquid: For organic waste liquid containing suspended impurities, filtration and adsorption are carried out through the quartz sand filter layer and activated carbon adsorption layer in tank 1; chelating agents are added to heavy metal waste liquid to achieve stabilization treatment; radioactive waste liquid is treated with zeolite adsorption + cement solidification; for waste liquid containing microorganisms, sterilization is carried out through the ultraviolet disinfection module; ensuring that the leachate indicators meet the GB 5085 series of hazardous waste identification standards.

[0049] Waste liquid treatment tank 72 is equipped with a liquid level sensor and an electronic record module for transfer manifests. The storage period strictly complies with the provisions of the "Law on the Prevention and Control of Environmental Pollution by Solid Waste". During transfer, an electronic manifest containing information such as waste liquid composition, treatment status and destination is automatically generated to meet the requirements of traceability management.

[0050] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A smart cleanable disinfectable dewar, characterized by, The utility model relates to a cleaning device for cleaning the inner wall of a dewar flask (1), which comprises: a cleaning cover (2) detachably mounted on the mouth of the dewar flask (1) and having a fixing frame (21) fixedly arranged on the top thereof; a flushing assembly (3) comprising a rotating tube (31), an annular spray tube (32), a plurality of first nozzles (33) and a plurality of second nozzles (34), the upper end of the rotating tube (31) being connected to a disinfectant supply device outside through a liquid inlet pipe (35), the lower end of the rotating tube (31) being connected to the center of the annular spray tube (32), the plurality of first nozzles (33) and the plurality of second nozzles (34) being alternately arranged outside the annular spray tube (32) around the center of the annular spray tube (32), the spray opening of the first nozzles (33) being arranged obliquely upward from the horizontal direction, the spray opening of the second nozzles (34) being arranged obliquely downward from the horizontal direction, the first nozzles (33) and the second nozzles (34) being used for flushing and disinfecting the inner wall of the dewar flask (1) by spraying the disinfectant; a lifting assembly (4) comprising a pneumatic cylinder (41) and a movable frame (42), the pneumatic cylinder (41) being mounted on the fixing frame (21) and being drivingly connected to the movable frame (42), the movable frame (42) being movably connected to the fixing frame (21) and being vertically moved under the driving of the pneumatic cylinder (41), the rotating tube (31) being rotatably mounted on the movable frame (42) around its axis and being vertically moved along with the movable frame (42); a rotating assembly (5) comprising a motor (51), a synchronous belt (52), a first synchronous pulley (53), a second synchronous pulley (54) and a shaft sleeve (55), the motor (51) being mounted on the cleaning cover (2) and being drivingly connected to the first synchronous pulley (53), the first synchronous pulley (53) being drivingly connected to the second synchronous pulley (54) through the synchronous belt (52), one end of the shaft sleeve (55) being fixedly connected to the second synchronous pulley (54), the shaft sleeve (55) being rotatably mounted on the cleaning cover (2) through a first bearing (56), the rotating tube (31) penetrating the second synchronous pulley (54) and the shaft sleeve (55) from top to bottom and being vertically reciprocally moved relative to the shaft sleeve (55), the motor (51) being used for driving the rotating tube (31) to reciprocally rotate 90° around its axis to drive the annular spray tube (32) to reciprocally rotate 90°; an air-drying assembly (6) comprising a micro air pump (61), the micro air pump (61) being connected to a sterile nitrogen supply device outside and being mounted on the cleaning cover (2) and being used for air-drying the inner wall of the dewar flask (1) after cleaning and disinfecting; a waste liquid treatment assembly (7) comprising a liquid discharge pipe (71) and a waste liquid treatment tank (72), one end of the liquid discharge pipe (71) being connected to a liquid discharge opening (11) arranged at the bottom of the dewar flask (1), the other end of the liquid discharge pipe (71) being connected to the waste liquid treatment tank (72), the waste liquid treatment tank (72) being used for collecting and treating the waste disinfectant generated during the cleaning of the inner wall of the dewar flask (1); a detection assembly (8) comprising a detection sensor (81), the detection sensor (81) being mounted on the liquid discharge pipe (71) and being used for real-time detection of the waste liquid flowing in the liquid discharge pipe (71) to detect the residual concentration of pollutants in the waste liquid and to determine whether the dewar flask (1) is completely cleaned and disinfected. A controller is connected with each component respectively for controlling the start and stop of each component.

2. The smart washable and sterilizable dewar of claim 1, wherein, The spray port axis of the first nozzle (33) is inclined upward by 30° relative to the horizontal line, and the spray port axis of the second nozzle (34) is inclined downward by 30° relative to the horizontal line.

3. The smart washable and sterilizable dewar of claim 1, wherein, The fixing frame (21) comprises a top plate (211) and four supporting columns (212), the top plate (211) is fixedly connected to the top of the cleaning cover (2) through the four supporting columns (212), and the air cylinder (41) is fixedly installed on the top plate (211) and has an extension rod penetrating through the top plate (211).

4. The smart washable and sterilizable dewar of claim 3, wherein, The movable frame (42) comprises an upper plate (421), a lower plate (422) and four connecting rods (423), the extension rod (411) of the air cylinder (41) is fixedly connected to the upper plate (421), the upper plate (421) is provided with four first guide holes (4211) corresponding to the four supporting columns (212), the first guide holes (4211) are used for movably containing the supporting columns (212), the upper plate (421) and the lower plate (422) are fixedly connected through the four connecting rods (423), the upper end of the rotating pipe (31) is rotatably connected to the upper plate (421) through a second bearing (37), and the lower end of the rotating pipe (31) is rotatably connected to the lower plate (422) through another second bearing (37).

5. The smart washable and sterilizable dewar of claim 4, wherein, The cleaning cover (2) is provided with four second guide holes (22), the four second guide holes (22) are provided in one-to-one correspondence with the four connecting rods (423), the connecting rods (423) are movably contained in the second guide holes (22) and penetrate through the cleaning cover (2), and the cleaning cover (2) is located between the upper plate (421) and the lower plate (422).

6. The smart washable and sterilizable dewar of claim 1, wherein, The outer side wall of the rotating pipe (31) is provided with a spline part (311), the shaft sleeve (55) and the second synchronous wheel (54) are provided with third guide holes (551), the third guide holes (551) penetrate through the second synchronous wheel (54) and the shaft sleeve (55) along the axis of the shaft sleeve (55), the inner wall of the third guide hole (551) is provided with a key groove (552), and the spline part (311) and the key groove (552) are matched, so that the rotating pipe (31) can move up and down in the third guide hole (551) along its axis while reciprocating by 90° around its axis.

7. The smart washable and sterilizable dewar of claim 3, wherein, The top plate (211) is provided with a first through hole (2111) and a second through hole (2112) penetrating through the thickness direction, the first through hole (2111) is used for passing the liquid inlet pipe (35) connecting the external disinfectant supply equipment and the rotating pipe (31), and the second through hole (2112) is used for passing the gas pipe (62) connecting the micro air pump (61) and the external sterile nitrogen supply equipment.

8. The smart washable and sterilizable dewar of claim 4, wherein, The upper plate (421) is provided with a first clearance hole (4212) and a second clearance hole (4213) through its thickness direction. The first clearance hole (4212) is provided corresponding to the motor (51) on the cleaning cover (2) to prevent the upper plate (421) and the motor (51) from interfering when the movable frame (42) moves down. The second clearance hole (4213) is provided corresponding to the micro air pump (61) on the cleaning cover (2) to prevent the upper plate (421) and the micro air pump (61) from interfering when the movable frame (42) moves down.

9. The smart washable and sterilizable dewar of claim 1, wherein, The waste liquid treatment component (7) also includes a control valve (73), and the drain pipe (71) is connected to the drain port (11) through the control valve (73) to control the start and stop of waste liquid discharge.

10. A method for intelligent cleaning and disinfecting of a dewar (1), characterized in that, The Dewar jar capable of intelligent cleaning and disinfection according to any one of claims 1-9 includes the following steps: Drain the low-temperature medium inside the Dewar jar (1), remove the original sealing cap, install the cleaning cap (2) onto the mouth of the Dewar jar (1), and let the lower end of the flushing assembly (3) extend into the Dewar jar (1) from the mouth. Start the flushing assembly (3), and the first nozzle (33) and the second nozzle (34) spray and flush the inner wall of the Dewar jar (1). Start the rotating assembly (5), and drive the annular spray pipe (32) to rotate 90° around the rotating pipe (31) so that the water flow sprayed by the first nozzle (33) and the second nozzle (34) flushes the inner wall of the Dewar jar (1) from left to right. At the same time, the lifting assembly (4) drives the flushing assembly (3) to descend along the axis of the rotating pipe (31) so that the water flow flushes the inner wall of the Dewar jar (1) from top to bottom. The waste liquid generated during rinsing enters the drain pipe (71) through the drain port (11) and flows into the waste liquid treatment tank (72) through the drain pipe (71); The detection component (8) detects the residual concentration of pollutants in the continuously flowing waste liquid in the drain pipe (71) until the detection value is lower than the preset qualified value; The controller controls the rinsing component (3) to stop spraying disinfectant, the rotating component (5) to stop working, the lifting component (4) drives the rinsing component (3) to rise and reset and then stop working, and the air drying component (6) injects sterile nitrogen into the Dewar canister (1) for air drying. After the inside of the Dewar jar (1) is thoroughly dried, close the control valve (73), remove the cleaning cap (2), and replace the original sealing cap, and wait for it to be used.

Images