Liquid nitrogen tank moving device

Abstract

The utility model discloses a liquid nitrogen tank moving device which is characterized in that the middle part of a lock hook of a lock catch assembly is rotatably fixed on the outer side of a second supporting plate through a positioning shaft, the lock hook is connected with a tension spring, the tension spring is positioned above the positioning shaft, one end of the tension spring is connected with the lock hook, and the other end of the tension spring is connected with the second supporting plate through a fixing rod; a locking rod is fixedly arranged on the outer side of the first supporting plate, a protective support composed of an I-shaped frame and a connecting plate is installed at the top of the vertical plate, an allochroic silica gel belt is arranged on the periphery of the liquid nitrogen tank, a concave spherical surface matched with the bottom of the liquid nitrogen tank is arranged on the bottom support, and anti-skid lines are arranged at the bottom of the vertical plate. According to the device, rapid switching between the two states of wheel supporting movement and vertical plate supporting fixing is achieved through opening and closing of the lock catch assemblies, the structure is simple and practical, operation is convenient and fast, the device has the functions of protection, toppling prevention and skid resistance, visual monitoring of temperature and leakage is achieved through the allochroic silica gel belt, and the safety of the liquid nitrogen tank in the storage and movement process is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a mobile liquid nitrogen tank device. Background Technology

[0002] A liquid nitrogen tank is a cryogenic container specifically designed for storing and transporting liquid nitrogen. Its operation involves maintaining the internal temperature at approximately -196°C through a double-layered jacket structure and vacuum insulation layer. The inner liner is made of special stainless steel, while the outer shell uses corrosion-resistant aluminum alloy or stainless steel. The vacuum layer between the two layers and the multiple layers of insulation work together to minimize heat conduction, ensuring long-term storage of liquid nitrogen. The main functions of liquid nitrogen tanks are to provide a stable ultra-low temperature environment for biological samples, experimental materials, and superconducting equipment. They are widely used in medical, scientific research, and industrial production fields for the cryopreservation of biological materials such as cells, tissues, and semen, as well as in industrial processes such as superconducting material testing and food quick-freezing.

[0003] Chinese patent document (publication number: CN222001156U) discloses a liquid nitrogen tank cleaning device, including a power rod and a support frame installed at the tank opening. A ring body is fixed inside the support frame, and the ring body includes a ring sleeve and a ring cover. A through hole is opened at the top of the ring cover. A hollow rotating shaft is connected and installed in the ring sleeve via a bearing. Rotating rods are symmetrically installed on the rotating shaft, and brushes are provided on the rotating rods. A second ratchet is fixed at the upper end of the rotating shaft, and a movable first ratchet is provided on the second ratchet. Both the first and second ratchets are located between the ring cover and the bearing. The power rod extends from the tank opening through the ratchets into the rotating shaft. The power rod has a hollow structure and includes a handheld tube, a spiral rod, and a plunger rod connected sequentially from top to bottom. A liquid suction assembly is connected to the bottom end of the plunger rod, and the spiral rod is located in the through hole of the first and second ratchets. By setting a ratchet assembly on the power rod, the rotation of the ratchet assembly drives the rotating shaft to rotate, which in turn drives the rotating rod to rotate, thus cleaning the inner wall of the tank. The liquid suction assembly at the bottom end of the plunger rod discharges waste liquid through the hollow power tube.

[0004] In the existing technology, the movement of liquid nitrogen tanks requires manual handling, which demands high physical strength and poses safety hazards during transportation. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a liquid nitrogen tank moving device. The liquid nitrogen tank is moved using a base, upright plate, and wheels as a base, which saves time and effort and avoids collisions. It also features color-changing silicone to monitor the heat preservation effect of the liquid nitrogen tank.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A liquid nitrogen tank moving device includes a base at the bottom of the liquid nitrogen tank. Upright plates are fixedly connected to both sides of the base. A first support plate and a second support plate are respectively hinged to the opposite side walls of the two upright plates. The second support plate is located above the first support plate, with its adjacent ends overlapping. Wheels are provided at the bottom of both the first and second support plates. A locking assembly is provided at the overlapping portion of the first and second support plates. The locking assembly includes a locking rod, a locking hook, a positioning shaft, a limiting rod, a tension spring, and a fixing rod. The middle part of the locking hook is rotatably fixed to the outside of the second support plate via the positioning shaft. A tension spring is connected to the locking hook and is located above the positioning shaft. One end of the tension spring is connected to the locking hook, and the other end is connected to the second support plate via the fixing rod. A limiting rod is provided between the tension spring and the positioning shaft and is fixedly installed on the second support plate. The locking rod is fixed to the outside of the first support plate. When the locking assembly is locked, the wheels support movement against the ground. When the locking assembly is released, the wheels move upward, and the upright plates fall to the ground to provide support.

[0008] As a preferred technical solution of the present invention, a protective bracket is installed on the top of the upright plate, the protective bracket includes an I-beam and a connecting plate; four fixing holes are opened at the top of the upright plate, and the I-beam is detachably installed in the fixing holes; a socket hole is opened at the bottom of both ends of the connecting plate, and the socket hole is fixedly installed on the top of two adjacent I-beams.

[0009] As a preferred embodiment of the present invention, a color-changing silicone strip is provided on the outer periphery of the liquid nitrogen tank.

[0010] As a preferred technical solution of the present invention, the base is provided with a concave spherical surface that is adapted to the bottom of the liquid nitrogen tank.

[0011] As a preferred technical solution of the present invention, all wheels are omnidirectional wheels.

[0012] As a preferred embodiment of the present invention, the hook portion of the lock hook is provided with an arc-shaped groove, which is adapted to the lock rod.

[0013] As a preferred embodiment of the present invention, the wheels are located on both sides of the locking assembly.

[0014] As a preferred technical solution of the present invention, both the base and the upright plate are made of stainless steel, and the base and the upright plate are fixedly connected by welding.

[0015] As a preferred embodiment of the present invention, the bottom of the upright plate is provided with anti-slip texture. Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The device of this utility model achieves switching between two working states through the opening and closing of the locking assembly: When it is necessary to move the liquid nitrogen tank, a downward force is applied to press the second support plate against the first support plate, the locking part of the locking hook slides on the locking rod and locks, and the wheel is supported on the ground, which can realize the movement of the liquid nitrogen tank; When it is necessary to fix the liquid nitrogen tank, push the locking hook to disengage it from the locking rod, and under the action of gravity, the first support plate and the second support plate tilt upward, the wheel moves upward, and the upright plate lands on the ground to form a stable support; At the same time, a color-changing silicone strip is set on the outer periphery of the liquid nitrogen tank. After the insulation layer of the liquid nitrogen tank fails, the water droplets that condense can change the color of the color-changing silicone strip, which serves as a reminder and warning, realizing real-time visual monitoring of the operating status of the liquid nitrogen tank, avoiding the tedious task of manually touching each liquid nitrogen tank to check the external water droplets.

[0017] 2. This utility model enables the safe storage and convenient movement of liquid nitrogen tanks. The concave spherical surface on the base fits the bottom of the liquid nitrogen tank, ensuring stable positioning of the liquid nitrogen tank. The protective structure formed by the upright plate, I-beam frame, and connecting plate effectively protects the liquid nitrogen tank from collision damage. The detachable I-beam frame and connecting plate design increases the applicability of the device. The locking assembly at the bottom facilitates foot operation and improves ease of use.

[0018] 3. This utility model achieves rapid switching between the storage and relocation functions of liquid nitrogen tanks through a simple mechanical structure, which not only improves operational efficiency but also ensures the safety of liquid nitrogen tanks during use. The overall structure can meet the long-term storage requirements of liquid nitrogen tanks and can also be used as a transport carrier, greatly improving practicality and safety. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall installation structure of this utility model;

[0020] Figure 2 This is a three-dimensional schematic diagram of the protective bracket structure of this utility model;

[0021] Figure 3 This is a three-dimensional schematic diagram of the locking assembly of this utility model when locked.

[0022] Figure 4 This is a three-dimensional schematic diagram of the locking assembly of this utility model when it is separated;

[0023] In the diagram: Liquid nitrogen tank-11; base support-12; upright plate-13; first support plate-14; second support plate-15; wheel-16; hinge-17; locking assembly-18; I-beam frame-19; connecting plate-20; locking rod-21; locking hook-22; positioning shaft-23; limit rod-24; tension spring-25; fixing rod-26; fixing hole-28. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[0025] Contents not described in detail in this specification are existing technologies known to those skilled in the art. In the description of this utility model, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Furthermore, terms such as "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Figures 1-4 As shown, a liquid nitrogen tank moving device includes a base 12 located at the bottom of a liquid nitrogen tank 11. Upright plates 13 are fixedly connected to both sides of the base 12. A first support plate 14 and a second support plate 15 are respectively mounted on the opposite side walls of the two upright plates 13 via hinges 17. The second support plate 15 is located above the first support plate 14 and overlaps at its adjacent ends. Wheels 16 are mounted at the bottom of both the first support plate 14 and the second support plate 15. A locking assembly 18 is mounted at the overlapping portion of the first support plate 14 and the second support plate 15. The locking assembly 18 includes a locking rod 21, a locking hook 22, a positioning shaft 23, a limiting rod 24, a tension spring 25, and a fixing rod 26. The middle part of the locking hook 22 is rotatably fixed to the outside of the second support plate 15 via the positioning shaft 23. A tension spring 25 is connected to the locking hook 22, and the tension spring 25 is located above the positioning shaft 23. One end of the tension spring 25 is connected to the locking hook 22, and the other end is connected to the second support plate 15 via the fixing rod 26. A limiting rod 24 is provided between the tension spring 25 and the positioning shaft 23. The limiting rod 24 is fixedly installed on the second support plate 15. A locking rod 21 is fixed to the outside of the first support plate 14. When the locking assembly 18 is locked, the wheel 16 supports the movement against the ground. When the locking assembly 18 is separated, the wheel 16 moves upward, and the upright plate 13 falls to the ground to form support.

[0027] In this utility model, the base of the device can be quickly switched and adjusted by opening and closing the locking assembly 18. It can be supported on the ground by the upright plate 13, or switched to be supported by the wheels 16 for walking displacement. Using this device, the liquid nitrogen tank 11 can be placed on the base of the device for a long time, or the device can be used as a transport carrier to transfer and transport multiple liquid nitrogen tanks.

[0028] When supported by wheels 16, this device can move the liquid nitrogen tank 11. The outer periphery of the liquid nitrogen tank 11 is surrounded by upright plates 13, I-beams 19 and connecting plates 20 to prevent collisions with the liquid nitrogen tank body, further protect the structure of the insulation layer and avoid affecting the storage effect.

[0029] The base 12 of the device has a concave spherical surface, which is opened to correspond to the bottom arc of the liquid nitrogen tank 11. The concave spherical surface is useful for limiting the liquid nitrogen tank, preventing the liquid nitrogen tank from shifting or falling off, and ensuring the stability of the liquid nitrogen tank 11 in the installed or moving state.

[0030] This device has an I-beam frame 19 installed on the upright plate 13. The I-beam frame 19 is connected to the upright plates 19 on both sides and then connected and fixed through the socket holes at both ends of the connecting plate 20. This enhances the structural stability and strengthens the anti-collision measures around the liquid nitrogen tank 11, further ensuring the safe movement or positioning and storage of the device and the liquid nitrogen tank.

[0031] The I-beam frame 19 and the connecting plate 20 are detachable and can be used in different spaces or situations.

[0032] The locking assembly is located at the bottom and can be locked or unlocked by foot operation, enhancing the convenience of the structure;

[0033] When wheel 16 is in working condition, second support plate 15 presses down on first support plate 14, hook at bottom of locking hook 22 hooks onto locking rod 21, upper part of locking hook 22 is pressed against limiting rod 24 under the action of tension spring 25, forming a stable state, wheels at bottom of the two support plates form support and can move the entire device and liquid nitrogen tank.

[0034] When the wheel 16 is not in operation, the upright plate 13 touches the ground to support the entire device and the liquid nitrogen tank, and the wheel 16 is in an upward-moving state off the ground; at this time, the hook of the locking hook 22 disengages from the locking rod 21, the locking hook 22 is located above the locking rod 12, the first support plate 14 and the second support plate 15 both rotate upward around their respective hinges 17 and tilt upward, driving the wheel 16 to move upward, and the upright plate 13 falls down to form support.

[0035] When the locking assembly 18 is switched from open to locked, a downward force is applied to the second support plate 15, causing the second support plate 15 to press down on the first support plate 14. This causes the inclined surface of the locking part of the locking hook 22 to slide downward against the locking rod 21 until the locking part of the locking hook 22 moves down to below the locking rod 21. Under the action of the tension spring 25, the upper part of the locking hook 22 abuts against the fixing rod 25, and the locking part of the locking hook 22 locks the locking rod 21, forming a stable state.

[0036] When the locking assembly 18 is switched from locked to unlocked, a downward force is first applied to the second support plate 15 to disengage the locking part of the locking hook 22 from the locking rod 21. Then, the locking hook 22 is pushed towards the first support plate 14, driving the locking part of the locking hook 22 to rotate around the positioning shaft 23 and move away from the locking rod 21. At this time, the downward force applied to the second support plate 15 is released. Under the operation of the gravity of the device and the liquid nitrogen tank, the wheel 16 moves upward and the upright plate 13 falls to the ground to form support.

[0037] Furthermore, a protective bracket is installed on the top of the upright plate 13. The protective bracket includes an I-beam 19 and a connecting plate 20. Four fixing holes 28 are opened at the top of the upright plate 13, and the I-beam 19 is detachably installed in the fixing holes 28. Sleeve holes are opened at the bottom of both ends of the connecting plate 20, and the sleeve holes are fixedly installed on the top of two adjacent I-beams 19.

[0038] Figure 1 and Figure 2 As shown, four fixing holes 28 are pre-set at the top of the upright plate 13. The I-beam frame 19 is detachably installed into the fixing holes 28. Then, the socket holes at the bottom of both ends of the connecting plate 20 are fixedly connected to the top of the adjacent I-beam frame 19, thus forming a comprehensive protective structure for the liquid nitrogen tank. In actual operation, the I-beam frame 19 and the connecting plate 20 can be flexibly disassembled and assembled according to different usage environments. The cooperation of the fixing holes 28 and the socket holes ensures the stability of the entire protective support system, forming a protective barrier around the outer perimeter of the liquid nitrogen tank. This design has multiple beneficial effects: the combination design of the I-beam frame and the connecting plate not only strengthens the overall structural strength of the device, but the multi-point fixing method also provides better support. At the same time, the detachable design allows the device to adapt to different usage environments and facilitates installation and maintenance. In addition, by providing reliable anti-collision protection for the liquid nitrogen tank, it effectively avoids collision damage during movement, protects the insulation layer structure of the liquid nitrogen tank, and ensures storage effect and usage safety.

[0039] Furthermore, a color-changing silicone strip (not shown in the figure) is provided on the outer periphery of the liquid nitrogen tank 11.

[0040] When the insulation layer of a liquid nitrogen tank fails, the water droplets that condense on the outside of the tank will cause the color-changing silicone strip to change color, serving as a warning and enabling real-time visual monitoring of the liquid nitrogen tank's operating status. This avoids the tedious task of having staff manually touch each liquid nitrogen tank to check for water droplets on the outside.

[0041] Operators can easily monitor the status of the liquid nitrogen tank, effectively preventing temperature changes inside the tank due to insulation failure, thus improving the practicality and safety of the entire device.

[0042] Color-changing silicone tape is commercially available and is part of existing technology. Its main function is to detect the amount of water on the outside of liquid nitrogen tanks.

[0043] Furthermore, the base 12 is provided with a concave spherical surface that is adapted to the bottom of the liquid nitrogen tank 11.

[0044] Figure 2 As shown, the concave spherical surface is formed according to the arc-shaped structure at the bottom of the liquid nitrogen tank 11. When the liquid nitrogen tank 11 is placed on the base 12, the concave spherical surface matches the shape of the bottom of the liquid nitrogen tank, thereby limiting and fixing the liquid nitrogen tank. In actual operation, whether in the installed state or the moving state, the concave spherical surface can effectively prevent the liquid nitrogen tank from shifting or falling off. It enhances the stability of the liquid nitrogen tank on the base, effectively prevents the liquid nitrogen tank from shaking or shifting during movement, and also simplifies the fixing structure. Reliable positioning can be achieved without additional fixing devices, thereby improving the safety and practicality of the device.

[0045] Furthermore, all of the wheels 16 are omnidirectional wheels.

[0046] Figure 1 and Figure 2 As shown, the caster wheel 16 can rotate 360 ​​degrees. When the locking assembly 18 is locked, the wheel 16 can flexibly turn and move in any direction when it is on the ground. In actual operation, the operator can easily push the device in any direction without having to adjust the direction of the wheel to turn and change direction, which reduces the labor intensity of the operator and improves the practicality and ease of operation of the device.

[0047] Furthermore, the hook portion of the locking hook 22 is provided with an arc-shaped groove (not shown in the figure), which is adapted to the locking rod 21.

[0048] When the device is in the locked state, the arc-shaped groove on the locking part of the locking hook 22 forms a limiting connection with the locking rod 21. The locking is achieved through the mutual cooperation of the arc-shaped groove and the locking rod 21. In actual operation, this limiting connection ensures that the locking assembly will not accidentally disengage when subjected to moving loads. By setting an arc-shaped groove on the locking part that matches the locking rod, a more reliable limiting structure is formed. This not only improves the structural stability in the locked state and effectively prevents relative displacement between the locking hook and the locking rod, but also increases the contact area and enhances the locking strength, ensuring the safety and reliability of the device in the moving state.

[0049] Furthermore, the wheels 16 are located on both sides of the locking assembly 18.

[0050] Figure 1 , Figure 2 As shown, when the locking assembly 18 is in the locked state, the wheels 16 on both sides touch the ground at the same time, and the symmetrical arrangement achieves stable support for the device. In actual operation, the design of the wheels 16 on both sides of the locking assembly 18 makes the device evenly stressed and maintains good balance during movement.

[0051] Furthermore, both the base 12 and the upright plate 13 are made of stainless steel, and the base 12 and the upright plate 13 are fixedly connected by welding.

[0052] Stainless steel possesses excellent corrosion resistance and mechanical strength, enabling it to withstand the challenges of liquid nitrogen cryogenic environments. The welded connection method ensures a robust overall structure between the base 12 and the upright plate 13. By selecting stainless steel, not only is the corrosion resistance and service life of the device improved, but structural stability in cryogenic environments is also guaranteed. Furthermore, the welded connection enhances the connection strength between the base and the upright plate, avoiding the loosening problems that may occur with bolted connections, thus improving the reliability and safety of the overall structure. In addition, the application of stainless steel is aesthetically pleasing and easy to clean, improving the practicality and ease of maintenance of the device.

[0053] Furthermore, the bottom of the upright plate 13 is provided with anti-slip texture (not shown in the figure).

[0054] The anti-slip texture increases the friction between the bottom of the upright plate 13 and the ground, allowing the upright plate 13 to be stably supported on the ground when the locking assembly 18 is unlocked. In actual operation, the anti-slip texture can effectively prevent the upright plate 13 from slipping or shifting when bearing weight. By setting the anti-slip texture on the bottom of the upright plate 13, not only is the stability of the device enhanced in a static state, effectively preventing accidental movement due to slippery ground, but the safety of the device during support is also improved. In addition, the design of the anti-slip texture also increases the contact area between the upright plate 13 and the ground, improving the overall support strength and ensuring the operational safety and reliability during the loading and unloading of liquid nitrogen tanks.

[0055] This utility model is illustrated through the above embodiments, but it is not limited to these embodiments, meaning that it does not necessarily depend on them for implementation. Those skilled in the art should understand that all related improvements to this utility model fall within its protection and disclosure scope.

Claims

1. A liquid nitrogen tank moving device, comprising a base (12) located at the bottom of a liquid nitrogen tank (11), wherein upright plates (13) are fixedly connected to both sides of the base (12), characterized in that, A first support plate (14) and a second support plate (15) are respectively installed on the opposite side walls of the two upright plates (13) via hinges (17). The second support plate (15) is located above the first support plate (14), and the two adjacent ends overlap. Wheels (16) are provided at the bottom of both the first support plate (14) and the second support plate (15). A locking assembly (18) is provided at the overlapping part of the first support plate (14) and the second support plate (15). The locking assembly (18) includes a locking rod (21), a locking hook (22), a positioning shaft (23), a limiting rod (24), a tension spring (25), and a fixing rod (26). The middle part of the locking hook (22) is rotatably fixed to the outside of the second support plate (15) through the positioning shaft (23). The tension spring (25) is connected to the locking hook (22) and is located above the positioning shaft (23). One end of the tension spring (25) is connected to the locking hook (22), and the other end is connected to the second support plate (15) through the fixing rod (26). A limiting rod (24) is provided between the tension spring (25) and the positioning shaft (23). The limiting rod (24) is fixedly installed on the second support plate (15), and the locking rod (21) is fixed to the outside of the first support plate (14). When the locking assembly (18) is locked, the wheel (16) moves against the ground to support the movement. When the locking assembly (18) is released, the wheel (16) moves upward and the upright plate (13) falls to the ground to form support.

2. The liquid nitrogen tank moving device according to claim 1, characterized in that, The top of the upright plate (13) is equipped with a protective bracket, which includes an I-beam (19) and a connecting plate (20); the top of the upright plate (13) is provided with 4 fixing holes (28), and the I-beam (19) is detachably installed in the fixing holes (28); both ends of the connecting plate (20) are provided with socket holes, and the socket holes are fixedly installed on the top of two adjacent I-beams (19).

3. The liquid nitrogen tank moving device according to claim 1, characterized in that, A color-changing silicone strip is provided around the outer periphery of the liquid nitrogen tank (11).

4. The liquid nitrogen tank moving device according to claim 1, characterized in that, The base (12) is provided with a concave spherical surface that is adapted to the bottom of the liquid nitrogen tank (11).

5. The liquid nitrogen tank moving device according to claim 1, characterized in that, All wheels (16) are omnidirectional wheels.

6. The liquid nitrogen tank moving device according to claim 1, characterized in that, The hook (22) has an arc-shaped groove, which is adapted to the locking rod (21).

7. The liquid nitrogen tank moving device according to claim 1, characterized in that, The wheels (16) are located on both sides of the locking assembly (18).

8. The liquid nitrogen tank moving device according to claim 1, characterized in that, Both the base (12) and the upright plate (13) are made of stainless steel, and the base (12) and the upright plate (13) are fixedly connected by welding.

9. The liquid nitrogen tank moving device according to any one of claims 1-8, characterized in that, The bottom of the upright plate (13) is provided with anti-slip texture.

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