Self-adapting storage tank for liquid nitrogen

Abstract

The utility model discloses a kind of self-adapting storage tanks for liquid nitrogen, including liquid nitrogen tank, outer sealing ring and cover body assembly.Adjustment assembly is driven threaded rod by upper sealing block rotation, realize the cavity volume adjustment between bottom plate and cover plate, self-adapting liquid nitrogen tank internal pressure variation.Set lower sealing block and lower sealing tube to ensure airtightness, indicating rod, indicating cover cooperate and show pressure, spring and support assembly protect parts, limit bottom plate movement, gas regulating valve controls gas in-out speed, guarantee liquid nitrogen storage stable, safe and efficient.

Description

Technical Field

[0001] This application relates to the field of liquid nitrogen storage tank pressure regulation technology, and specifically to an adaptively regulated liquid nitrogen storage tank. Background Technology

[0002] In the field of liquid nitrogen storage, traditional liquid nitrogen storage tanks face numerous unresolved problems. Liquid nitrogen's volatile nature and significant temperature difference with the external environment make the internal pressure highly susceptible to instability during storage. On one hand, liquid nitrogen evaporation increases the amount of gas inside the tank, while the residual room-temperature gas shrinks drastically upon contact with the cold liquid nitrogen, leading to negative pressure within the tank. On the other hand, if the evaporating gas cannot be effectively and promptly released, it can cause overpressure within the tank. This pressure instability not only affects the stability and longevity of liquid nitrogen storage but can also trigger safety accidents, such as tank deformation or even rupture.

[0003] Meanwhile, traditional storage tanks generally lack intuitive pressure display methods, making it difficult for staff to accurately monitor the pressure status inside the tank in real time and make timely adjustments. Furthermore, due to the lack of effective control mechanisms and component protection measures, frequent pressure fluctuations can lead to excessive wear on internal parts of the storage tank, significantly reducing equipment lifespan and increasing maintenance costs.

[0004] Therefore, developing a liquid nitrogen storage tank with automatic pressure regulation, intuitive pressure display, and component protection mechanism is of great significance for improving the safety, stability, and efficiency of liquid nitrogen storage. Summary of the Invention

[0005] To address the aforementioned technical problems, this application resolves the issues affecting the stability, longevity, and lifespan of liquid nitrogen storage tanks, such as unstable internal pressure due to liquid nitrogen evaporation and temperature changes, lack of intuitive pressure display and effective control methods, and easy wear and tear of parts caused by pressure changes.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: an adaptively adjustable storage tank for liquid nitrogen, comprising a liquid nitrogen tank, an outer sealing ring, and a cover assembly. The liquid nitrogen tank and the outer sealing ring are fixedly connected. The cover assembly includes a cover plate, a connecting buckle, and an inner sealing ring. The inner sealing ring is fixedly installed on the cover plate. Multiple connecting buckles are rotatably provided on the cover plate. The outer sealing ring is fixedly connected to the opening of the liquid nitrogen tank. The inner sealing ring and the connecting buckles are provided with rubber rings for sealing.

[0007] An adjustment assembly is fixedly installed on the liquid nitrogen tank. The adjustment assembly includes a base plate, an intermediate ring, a threaded rod, an upper sealing block, and a central connecting pipe. The intermediate ring is slidably disposed on the inner wall of the inner sealing ring. The intermediate ring has two convex rings. The base plate is slidably disposed between the two convex rings of the intermediate ring. The base plate has two grooves. A density diaphragm is fixedly installed on the inner sealing ring. The density diaphragm is connected to the base plate by a dot-adhesion method. The threaded rod is fixedly connected to the base plate. The central connecting pipe is fixedly installed on the cover plate. The end of the central connecting pipe away from the base plate is rotatably connected to the upper sealing block. The upper sealing block is threadedly connected to the threaded rod.

[0008] Preferably, a lower sealing block is fixedly installed on the cover plate, a lower sealing tube is rotatably installed on the lower sealing block, the lower sealing tube is slidably connected to the threaded rod, and a rotating ring is fixedly installed on the upper sealing block.

[0009] Preferably, a plurality of indicator rods are fixedly provided on the base plate, the indicator rods slide on the slide groove of the cover plate, a plurality of indicator covers are fixedly installed on the cover plate, the indicator covers are transparent shell structures, and an indicator plate is provided at the end of the indicator rod away from the base plate, the indicator plate slides on the indicator cover.

[0010] Preferably, a spring is fitted onto the indicator rod, and the two ends of the spring are fixedly connected to the base plate and the cover plate, respectively.

[0011] Preferably, the inner sealing ring is provided with a support assembly, which includes an upper mounting block, a connecting rod, a connecting shaft, and a slide block. The upper mounting block is fixedly mounted on the inner wall of the inner sealing ring, the connecting rod is rotatably mounted on the upper mounting block, the connecting shaft is rotatably mounted on the end of the connecting rod away from the upper mounting block, the slide block is fixedly mounted on the base plate, and the connecting shaft is slidably mounted on the slide groove of the slide block.

[0012] Preferably, a plurality of external connecting pipes are fixedly provided on the cover plate, and a gas regulating valve is fixedly installed on each external connecting pipe.

[0013] The technical solution provided in this application has the following advantages compared with the prior art:

[0014] 1. The unique adjustment component design of this application can automatically and precisely adjust the cavity volume between the bottom plate and the cover plate according to the pressure fluctuations inside the liquid nitrogen tank. When the pressure inside the tank changes, the gas is drawn in or discharged through a clever threaded transmission, so that the pressure inside the tank is always maintained within a stable range, which greatly improves the stability and longevity of liquid nitrogen storage and effectively avoids storage risks caused by abnormal pressure.

[0015] 2. The combination of the indicator rod and the transparent indicator cover in this application provides workers with an intuitive visual interface for pressure changes. The position of the indicator plate on the indicator rod relative to the scale line on the indicator cover reflects the pressure status inside the liquid nitrogen tank in real time. Workers can proactively take adjustment measures based on this information, anticipate and avoid potential risks in advance, and ensure the safety and controllability of the storage process.

[0016] 3. In this application, the spring and support assembly together form a component protection mechanism. The spring, with its own elasticity, buffers the impact of pressure changes on the components, preventing damage caused by excessive contact due to excessive or insufficient pressure. The support assembly provides a rigid limit when the base plate moves to its extreme position, further preventing component wear caused by excessive pressure differences and significantly extending the equipment's service life.

[0017] 4. The gas regulating valve of this application enables the storage tank to flexibly control the gas inlet and outlet speeds. Faced with complex pressure changes inside the liquid nitrogen tank under different operating conditions, the storage tank can quickly adapt to and stabilize the internal pressure by adjusting the gas flow rate, thereby enhancing the environmental adaptability and operational reliability of the device and meeting diverse liquid nitrogen storage needs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this application;

[0019] Figure 2 This is a cross-sectional view of this application;

[0020] Figure 3 This is a cross-sectional view of the cover assembly of this application;

[0021] Figure 4 This is a schematic diagram of the structure of the groove in the base plate of this application;

[0022] Figure 5 This is a schematic diagram of the structure of the supporting components of this application;

[0023] Figure 6 This is a schematic diagram of the structure of the intermediate ring in this application.

[0024] In the diagram: 101-Liquid nitrogen tank; 102-Outer sealing ring; 103-Cover plate; 104-Connecting buckle; 105-Inner sealing ring; 106-Central connecting pipe; 107-Upper sealing block; 108-Rotating ring; 109-Threaded rod; 110-Lower sealing block; 111-Lower sealing pipe; 112-Base plate; 113-Intermediate ring; 114-Outer connecting pipe; 115-Gas regulating valve; 116-Indicator rod; 117-Indicator cover; 118-Spring; 119-Upper mounting block; 120-Connecting rod; 121-Connecting shaft; 122-Slide seat; 123-Sealing diaphragm. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] like Figures 1 to 6 As shown, an adaptive adjustable storage tank for liquid nitrogen includes a liquid nitrogen tank 101, an outer sealing ring 102, and a cover assembly. The liquid nitrogen tank 101 and the outer sealing ring 102 are fixedly connected. The cover assembly includes a cover plate 103, connecting buckles 104, and an inner sealing ring 105. The inner sealing ring 105 is fixedly installed on the cover plate 103. Multiple connecting buckles 104 are rotatably arranged on the cover plate 103. The outer sealing ring 102 is fixedly connected to the opening of the liquid nitrogen tank 101. The inner sealing ring 105 and the connecting buckles 104 are provided with rubber rings for sealing.

[0028] An adjustment assembly is fixedly installed on the liquid nitrogen tank 101. The adjustment assembly includes a base plate 112, an intermediate ring 113, a threaded rod 109, an upper sealing block 107, and a central connecting pipe 106. The intermediate ring 113 is slidably disposed on the inner wall of the inner sealing ring 105. The intermediate ring 113 is provided with two protruding rings. The base plate 112 is slidably disposed between the two protruding rings of the intermediate ring 113. The base plate 112 is provided with two grooves. A sealing diaphragm 123 is fixedly installed on the inner sealing ring 105. The density diaphragm 123 is connected to the base plate 112 by a spot-adhesion method. The threaded rod 109 is fixedly connected to the base plate 112. The central connecting pipe 106 is fixedly installed on the cover plate 103. The end of the central connecting pipe 106 away from the base plate 112 is rotatably connected to the upper sealing block 107. The upper sealing block 107 is threadedly connected to the threaded rod 109.

[0029] Specifically, a cavity is formed between the base plate 112 and the cover plate 103. The volume of this cavity is adjusted to accommodate and regulate changes in pressure within the liquid nitrogen tank 101. After liquid nitrogen is added to the liquid nitrogen tank 101, the cover plate 103 needs to be installed. When sealing the liquid nitrogen tank 101, because the liquid nitrogen comes into contact with the outside environment and evaporates, and some ambient temperature gas remains inside the liquid nitrogen tank 101, sealing the opening of the liquid nitrogen tank 101 will lower the temperature and reduce the volume due to the low temperature of the liquid nitrogen, creating a negative pressure. Therefore, before sealing, the base plate 112 needs to be adjusted to move closer to the cover plate 103 to compress the cavity, allowing the gas inside the cavity to be discharged through the gas valve of the cover plate 103, i.e., controlling the upper sealing block 107 to be centrally connected. As the tube 106 rotates, the upper sealing block 107 drives the threaded rod 109 to rise via the thread. This causes the lower end of the threaded rod 109 to pull the base plate 112. The base plate 112 slides upward on the intermediate ring 113. After the base plate 112 contacts the convex ring on the intermediate ring 113, it pushes the intermediate ring 113 to slide upward on the inner wall of the inner sealing ring 105. This allows the base plate 112 to move closer to the cover plate 103, further compressing the volume of the cavity between the base plate 112 and the intermediate ring 113, which facilitates subsequent adjustment of the negative pressure inside the liquid nitrogen tank 101.

[0030] The opening at the lower end of the inner sealing ring 105 is sealed by the density diaphragm 123 to prevent gas leakage from the cavity between the bottom plate 112 and the cover plate 103 into the liquid nitrogen tank 101. Figure 2 As shown, by setting grooves on the base plate 112, the contact area between the density diaphragm 123 and the base plate 112 is increased, which can better push the base plate 112 to move when pressurized.

[0031] After the cavity between the base plate 112 and the cover plate 103 is compressed, the cover assembly is installed onto the liquid nitrogen tank 101. This allows the inner sealing ring 105 to be installed onto the outer sealing ring 102. A seal is formed by the rubber rings on the inner and outer sealing rings 105 and 102, preventing gas leakage from inside the liquid nitrogen tank 101. During a period of sealing, the room-temperature gas inside the liquid nitrogen tank 101 shrinks due to cooling, creating a negative pressure. This pressure drives the base plate 112 to move away from the cover plate 103. The base plate 112 then moves the threaded rod 109 on the upper sealing block 107, which in turn rotates on the central connecting pipe 106. This increases the volume of the cavity between the base plate 112 and the cover plate 103, allowing external gas to be drawn in through the valve on the cover plate 103. This automatically adapts to the pressure inside the liquid nitrogen tank 101, achieving automatic adjustment and ensuring the stability and longevity of the liquid nitrogen stored in the liquid nitrogen tank 101.

[0032] like Figure 2 , Figure 3 and Figure 5As shown, a lower sealing block 110 is fixedly installed on the cover plate 103, and a lower sealing tube 111 is rotatably arranged on the lower sealing block 110. The lower sealing tube 111 is slidably connected to the threaded rod 109, and a rotating ring 108 is fixedly installed on the upper sealing block 107.

[0033] Specifically, during use, the upper sealing block 107 is rotated by the rotating ring 108, which in turn actively drives the threaded rod 109 to rise and fall. The lower end of the cover plate 103 is sealed by the lower sealing block 110 and the lower sealing tube 111 to prevent gas leakage and ensure pressure regulation capability.

[0034] like Figure 2 , Figure 3 and Figure 5 As shown, a plurality of indicator rods 116 are fixedly installed on the base plate 112. The indicator rods 116 slide on the slide groove of the cover plate 103. A plurality of indicator covers 117 are fixedly installed on the cover plate 103. The indicator covers 117 are transparent shell structures. An indicator plate is provided at the end of the indicator rod 116 away from the base plate 112. The indicator plate slides on the indicator cover 117.

[0035] Specifically, when the base plate 112 is raised or lowered, the indicator rod 116 moves along the slide groove of the cover plate 103 and the inner wall of the indicator cover 117. The position of the indicator plate on the indicator rod 116 is used to determine the pressure change inside the liquid nitrogen tank 101. That is, it rises when pressurizing and falls when depressurizing. The scale line on the indicator cover 117 is set to warn the staff. The staff can judge the state inside the liquid nitrogen tank 101 by the position of the indicator plate on the indicator rod 116, so that they can make active adjustments and avoid risks.

[0036] like Figure 2 , Figure 3 and Figure 5 As shown, a spring 118 is sleeved on the indicator rod 116, and the two ends of the spring 118 are fixedly connected to the base plate 112 and the cover plate 103, respectively.

[0037] Specifically, the position of the base plate 112 is adjusted by the elasticity of the spring 118 to prevent excessive or insufficient pressure from exceeding the movable range of the base plate 112. This would prevent excessive contact between the base plate 112, the indicator rod 116, the threaded rod 109, and the cover plate 103, which could damage the components. Because of the spring 118, the movement of the base plate 112 is not affected when the pressure difference is small and poses no danger. This reduces the frequency of movement of the indicator rod 116, avoiding excessive attention and worry from staff regarding the indicator's position, which could affect normal work. If staff observe a change in the indicator rod 116, they will need to pay attention to the liquid nitrogen tank 101.

[0038] like Figure 2 , Figure 3 and Figure 5 As shown, a support assembly is provided on the inner sealing ring 105. The support assembly includes an upper mounting block 119, a connecting rod 120, a connecting shaft 121, and a slide block 122. The upper mounting block 119 is fixedly installed on the inner wall of the inner sealing ring 105. The connecting rod 120 is rotatably mounted on the upper mounting block 119. The connecting shaft 121 is rotatably mounted on the end of the connecting rod 120 away from the upper mounting block 119. The slide block 122 is fixedly installed on the base plate 112. The connecting shaft 121 is slidably mounted on the slide groove of the slide block 122.

[0039] Specifically, when the base plate 112 is raised or lowered, the slide block 122 on the base plate 112 drives the connecting shaft 121 to slide on the slide groove of the slide block 122, thereby moving one end of the connecting rod 120 and causing the connecting rod 120 to rotate on the upper mounting block 119, thus adapting to the movement of the base plate 112. When the lifting distance of the base plate 112 reaches its limit, the movement of the base plate 112 is restricted by the hard contact between the connecting shaft 121 on the connecting rod 120 and the end of the slide groove of the slide block 122, further avoiding the effects of excessive pressure difference, such as wear on other parts.

[0040] like Figure 1 and Figure 2 As shown, a plurality of external connecting pipes 114 are fixedly installed on the cover plate 103, and a gas regulating valve 115 is fixedly installed on each external connecting pipe 114.

[0041] Specifically, the gas valve of the cover plate 103 is connected to the gas regulating valve 115 through the external connecting pipe 114, thereby using the gas regulating valve 115 to control the speed of gas entry and exit.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A liquid nitrogen adaptive regulating storage tank, comprising a liquid nitrogen tank (101), an outer sealing ring (102), and a cover assembly, wherein the liquid nitrogen tank (101) and the outer sealing ring (102) are fixedly connected, the cover assembly comprises a cover plate (103), a connecting buckle (104), and an inner sealing ring (105), the inner sealing ring (105) being fixedly mounted on the cover plate (103), a plurality of connecting buckles (104) being rotatably disposed on the cover plate (103), the outer sealing ring (102) being fixedly connected to the opening of the liquid nitrogen tank (101), and the inner sealing ring (105) and the connecting buckle (104) being provided with rubber rings for sealing, characterized in that: An adjustment assembly is fixedly installed on the liquid nitrogen tank (101). The adjustment assembly includes a base plate (112), an intermediate ring (113), a threaded rod (109), an upper sealing block (107), and a central connecting pipe (106). The intermediate ring (113) is slidably disposed on the inner wall of the inner sealing ring (105). Two convex rings are provided on the intermediate ring (113). The base plate (112) is slidably disposed between the two convex rings of the intermediate ring (113). The base plate (112) is provided with... Two grooves, a density diaphragm (123) is fixedly installed on the inner sealing ring (105), the density diaphragm (123) is connected to the base plate (112) by spot bonding, the threaded rod (109) is fixedly connected to the base plate (112), the central connecting tube (106) is fixedly installed on the cover plate (103), the end of the central connecting tube (106) away from the base plate (112) is rotatably connected to the upper sealing block (107), and the upper sealing block (107) is threadedly connected to the threaded rod (109).

2. The adaptively adjustable storage tank for liquid nitrogen according to claim 1, characterized in that: A lower sealing block (110) is fixedly installed on the cover plate (103), and a lower sealing tube (111) is rotatably installed on the lower sealing block (110). The lower sealing tube (111) is slidably connected to the threaded rod (109), and a rotating ring (108) is fixedly installed on the upper sealing block (107).

3. The adaptively adjustable storage tank for liquid nitrogen according to claim 1, characterized in that: Multiple indicator rods (116) are fixedly installed on the base plate (112). The indicator rods (116) slide on the groove of the cover plate (103). Multiple indicator covers (117) are fixedly installed on the cover plate (103). The indicator covers (117) are transparent shell structures. An indicator plate is provided at the end of the indicator rod (116) away from the base plate (112). The indicator plate slides on the indicator cover (117).

4. The adaptively adjustable storage tank for liquid nitrogen according to claim 3, characterized in that: A spring (118) is fitted on the indicator rod (116), and the two ends of the spring (118) are fixedly connected to the base plate (112) and the cover plate (103) respectively.

5. The adaptively adjustable storage tank for liquid nitrogen according to claim 1, characterized in that: The inner sealing ring (105) is provided with a support assembly, which includes an upper mounting block (119), a connecting rod (120), a connecting shaft (121), and a slide (122). The upper mounting block (119) is fixedly installed on the inner wall of the inner sealing ring (105). The connecting rod (120) is rotatably installed on the upper mounting block (119). The connecting shaft (121) is rotatably installed at the end of the connecting rod (120) away from the upper mounting block (119). The slide (122) is fixedly installed on the base plate (112). The connecting shaft (121) is slidably installed on the slide groove of the slide (122).

6. The adaptively adjustable storage tank for liquid nitrogen according to claim 1, characterized in that: A plurality of external connecting pipes (114) are fixedly installed on the cover plate (103), and a gas regulating valve (115) is fixedly installed on each external connecting pipe (114).

Images