Liquid nitrogen monitoring equipment

Abstract

Liquid nitrogen monitoring equipment comprises a main body, an equipment box is embedded in the upper side of the main body, the lower side of the equipment box is connected with a sensor assembly through a link part, the upper side end of the sensor assembly is located in the main body, and the lower side end of the sensor assembly extends to the outer side of the main body; the main body is of a cylinder structure formed by polyurethane foam, and a plurality of wiring grooves and wire passing holes are formed in the outer side of the main body; a stainless steel cover plate is fixed to the upper side of the body, a downwards-sunken groove is formed in the center of the upper side of the stainless steel cover plate, the equipment box is located in the groove, a round hole is formed in the center of the bottom of the groove, and the linkage component penetrates through the round hole. The equipment box comprises an upper cover, a shell and a lower cover which are sequentially arranged from top to bottom, the upper cover and the shell are clamped, the shell and the lower cover are clamped, an upper cavity is formed between the upper cover and the shell, a lower cavity is formed between the shell and the lower cover, a lithium battery and a PCB are arranged in the upper cavity, the lower cavity is provided with a first PCB link plate, and the first PCB link plate is clamped in the middle of the upper side of the lower cover.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen monitoring technology, and in particular to a liquid nitrogen monitoring device. Background Technology

[0002] Currently, liquid nitrogen monitoring equipment is widely used in the industrial field for real-time monitoring of parameters such as liquid nitrogen temperature. However, existing liquid nitrogen monitoring equipment often uses ordinary materials for its main structure, resulting in poor insulation performance and making it prone to temperature fluctuations that affect monitoring accuracy. The connection between the equipment box and sensor components is complex, making disassembly and assembly inconvenient and hindering equipment maintenance and repair. The sensor components have an unreasonable structural design, with insufficiently stable connections between components, making them prone to loosening and detachment, affecting the accuracy and reliability of monitoring data. Furthermore, the wiring layout of existing equipment is chaotic, lacking effective wiring channels and through-holes, resulting in messy wiring that not only affects the aesthetics of the equipment but may also cause malfunctions due to wire wear. Additionally, the overall waterproof and corrosion-resistant performance of the equipment is poor, making it susceptible to damage during long-term use in a liquid nitrogen environment, thus reducing its lifespan. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a liquid nitrogen monitoring device, thereby solving the above-mentioned defects.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A liquid nitrogen monitoring device, comprising:

[0006] The main body has a device box embedded in its upper side, and a sensor assembly is connected to the lower side of the device box via a connecting component. The upper end of the sensor assembly is located inside the main body, and the lower end of the sensor assembly extends to the outside of the main body.

[0007] In one or more embodiments of this utility model, the main body is a cylindrical structure formed of polyurethane foam, and the outer side of the main body is provided with several wiring grooves and wiring holes.

[0008] In one or more embodiments of this utility model, a stainless steel cover plate is fixed on the upper side of the main body, and a downwardly recessed groove is provided at the center of the upper side of the stainless steel cover plate. The equipment box is located in the groove, and a round hole is provided at the center of the bottom of the groove. The connecting component passes through the round hole.

[0009] In one or more embodiments of this utility model, the device box includes an upper cover, an outer shell, and a lower cover arranged sequentially from top to bottom. The upper cover and the outer shell, as well as the outer shell and the lower cover, are engaged with each other. An upper cavity is formed between the upper cover and the outer shell, and a lower cavity is formed between the outer shell and the lower cover. A lithium battery and a PCB circuit board are disposed in the upper cavity, and a first PCB connecting board is disposed in the lower cavity. The first PCB connecting board is engaged with the upper middle part of the lower cover. A PET film is also fixed to the upper side of the upper cover.

[0010] In one or more embodiments of this utility model, the connecting component includes a base, a second PCB connecting board is mounted in a recess on the upper side of the base, a retractable pin is welded on the first PCB connecting board, and the retractable pin is in contact with the contact on the second PCB connecting board.

[0011] In one or more embodiments of this utility model, the sensor assembly includes a polytetrafluoroethylene (PTFE) tube screwed onto the lower side of a base. The PTFE tube is vertically disposed within the main body. A polytetrafluoroethylene (PTFE) tube is screwed onto the lower side of the PTFE tube. A stainless steel outer tube is fixed to the lower side of the PTFE tube. A stainless steel inner tube is disposed inside the stainless steel outer tube. A bottom fixing seat is fixed to the lower ends of the stainless steel outer tube and the stainless steel inner tube. A first temperature probe is disposed within the bottom fixing seat. The upper side of the first temperature probe extends into the stainless steel inner tube.

[0012] In one or more embodiments of this utility model, a second temperature probe is fixed on the lower end face of the main body.

[0013] In one or more embodiments of this utility model, two opposing stainless steel handles are fixed on the stainless steel cover plate.

[0014] The beneficial effects of this utility model are:

[0015] This utility model adopts a cylindrical body formed of polyurethane foam, whose excellent thermal insulation performance can reduce liquid nitrogen temperature fluctuations and improve monitoring accuracy. The wiring grooves and through holes on the outside of the body make the wiring layout neat and reduce the risk of wiring wear and failure. The equipment box is positioned by the groove of the stainless steel cover plate and is strongly glued to the body, making the structure stable and easy to install. The upper cover, outer shell and lower cover of the equipment box are connected by snap-fit. The internal components such as lithium battery and PCB circuit board are reasonably arranged, making disassembly and assembly convenient and easy to maintain. The base of the connecting component is engaged with the second PCB connecting board, and the retractable pin of the first PCB connecting board makes contact with the second PCB connecting board to achieve a stable electrical connection. The base is screwed into the PTFE tube for easy installation. In the sensor assembly, the PTFE tube, PTFE tube, stainless steel outer tube and stainless steel inner tube are connected by threads and grommets, making the structure stable. The high-precision configuration of the first temperature probe and the second temperature probe ensures accurate monitoring data. The second temperature probe on the lower side of the body can assist in monitoring the ambient temperature. The stainless steel handle facilitates the movement of the equipment. The overall design improves the practicality, reliability and service life of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural diagram after removing the main body, stainless steel cover plate, and stainless steel outer tube;

[0018] Figure 3 This is a cross-sectional view of the present invention;

[0019] Figure 4 This is an exploded view of the present invention;

[0020] Figure 5 yes Figure 4 Enlarged view of point A in the image;

[0021] Figure 6 yes Figure 4 Enlarged view of point B in the image;

[0022] Figure 7 yes Figure 4 Enlarged view of point C in the image. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0024] In this embodiment, as Figures 1 to 7 As shown, a liquid nitrogen monitoring device includes a main body 10, an equipment box is embedded in the upper side of the main body 10, and a sensor assembly is connected to the lower side of the equipment box through a connecting component. The upper end of the sensor assembly is located inside the main body 10, and the lower end of the sensor assembly extends to the outside of the main body 10.

[0025] In one or more embodiments of this utility model, the main body 10 is a cylindrical structure formed of polyurethane foam, and the outer side of the main body 10 is provided with several wiring grooves and wiring holes.

[0026] In one or more embodiments of this utility model, a stainless steel cover plate 8 is fixed on the upper side of the main body 10, and a downwardly recessed groove is provided at the center of the upper side of the stainless steel cover plate 8. The equipment box is located in the groove, and a round hole is provided at the center of the bottom of the groove. The connecting component passes through the round hole.

[0027] In this embodiment, the main body 10 has a first cylindrical groove, a second cylindrical groove, and a third cylindrical groove arranged sequentially from top to bottom at its center. The diameter of the first cylindrical groove is larger than the diameter of the second cylindrical groove, and the diameter of the second cylindrical groove is larger than the diameter of the third cylindrical groove. The groove of the stainless steel cover plate 8 is located within the first cylindrical groove, and the connecting component is located within the first and second cylindrical grooves. The stainless steel cover plate 8 and the main body 10 are bonded together with strong adhesive.

[0028] In one or more embodiments of this utility model, the device box includes an upper cover 2, an outer shell 5, and a lower cover 7 arranged sequentially from top to bottom. The upper cover 2 and the outer shell 5, as well as the outer shell 5 and the lower cover 7, are engaged with each other. An upper cavity is formed between the upper cover 2 and the outer shell 5, and a lower cavity is formed between the outer shell 5 and the lower cover 7. A lithium battery 3 and a PCB circuit board 4 are disposed in the upper cavity, and a first PCB connecting board 6 is disposed in the lower cavity. The first PCB connecting board 6 is engaged with the upper middle part of the lower cover 7. A PET film 1 is also fixed on the upper side of the upper cover 2.

[0029] In this embodiment, a first limiting block is formed in the middle of the upper side of the lower cover 7, and a first notch is opened on the edge of the first PCB connecting board 6. The first limiting block engages with the first notch. The lithium battery 3 is electrically connected to the PCB circuit board 4; the upper cover 2, the outer shell 5, and the lower cover 7 are connected and fixed by screws and nuts, and the upper cover 2 is bonded to the PET film 1 with 3M adhesive.

[0030] In one or more embodiments of this utility model, the connecting component includes a base 12, a second PCB connecting board 11 is mounted in the upper recess of the base 12, a retractable pin is welded on the first PCB connecting board 6, and the retractable pin is in contact with the contact on the second PCB connecting board 11.

[0031] In this embodiment, a second limiting block is formed in the upper recess of the base 12, and a second notch is opened on the edge of the second PCB connecting board 11. The second limiting block is engaged with the second notch. A protruding threaded structure is formed on the lower side of the base 12, and the upper side of the polytetrafluoroethylene tube 19 is screwed to the threaded structure.

[0032] In one or more embodiments of this utility model, the sensor assembly includes a polytetrafluoroethylene (PTFE) tube 19 screwed onto the lower side of a base 12. The PTFE tube 19 is vertically disposed within the main body 10. A polytetrafluoroethylene (PTFE) tube 16 is screwed onto the lower side of the PTFE tube 19. A stainless steel outer tube 14 is fixed to the lower side of the PTFE tube 16. A stainless steel inner tube 15 is disposed inside the stainless steel outer tube 14. A bottom fixing seat 18 is fixed to the lower ends of the stainless steel outer tube 14 and the stainless steel inner tube 15. A first temperature probe 17 is disposed within the bottom fixing seat 18. The upper side of the first temperature probe 17 extends into the stainless steel inner tube 15.

[0033] In this embodiment, the PTFE tube 19 is located within the third cylindrical groove, the upper end of the PTFE tube 16 is located within the third cylindrical groove, and the lower end of the PTFE tube 16 extends outside the third cylindrical groove. A stainless steel outer tube 14 is fitted over the stainless steel inner tube 15, and the first temperature probe 17 is installed at the bottom inside the stainless steel inner tube 15. The PTFE tube 16 and the bottom fixing seat 18 are connected to the stainless steel outer tube 14 via grommets, and the base 12, PTFE tube 16, and PTFE tube 19 are interconnected via threads.

[0034] In one or more embodiments of this utility model, a second temperature probe 13 is fixed on the lower end face of the main body 10.

[0035] In this embodiment, the first temperature probe 17 is a 2.8*10mm TP100A grade temperature probe, and the second temperature probe 13 is a 4*30mm PT100A grade temperature probe.

[0036] In one or more embodiments of this utility model, two opposing stainless steel handles 9 are fixed on the stainless steel cover plate 8. The two ends of the stainless steel handles 9 are bent downwards, and their bent extension ends form a threaded structure, which penetrates the stainless steel cover plate 8 and is fixed by nuts.

[0037] Installation of main body and cover plate:

[0038] Apply strong adhesive to the first cylindrical groove of the main body 10, align the groove of the stainless steel cover plate 8 with the first cylindrical groove and insert it, ensuring that the round hole is aligned with the second cylindrical groove, and wait for the adhesive to cure.

[0039] Pass the threaded ends of the two stainless steel handles 9 through the corresponding holes in the stainless steel cover plate 8 and fix them to the underside of the cover plate with nuts.

[0040] After the lithium battery 3 is electrically connected to the PCB circuit board 4, it is placed into the upper cavity formed by the upper cover 2 and the outer shell 5, and the upper cover 2 and the outer shell 5 are locked together.

[0041] The first PCB connecting board 6 is fixed to the upper middle part of the lower cover 7 by the engagement of the first limiting block and the first notch, and is placed into the lower cavity formed by the outer shell 5 and the lower cover 7, thereby engaging the outer shell 5 and the lower cover 7.

[0042] Cables are connected between PCB circuit board 4 and the first PCB connecting board 6, and the various components of the device box are fixed with screws and nuts.

[0043] Apply 3M adhesive to the inside of the PET mask 1 and attach it to the top of the cover 2.

[0044] The second PCB connecting board 11 is fixed to the upper recess of the base 12 by the engagement of the second limiting block and the second notch.

[0045] Tighten the threaded structure on the lower side of the base 12 to the threaded structure on the upper side of the PTFE tube 19 to ensure a tight connection.

[0046] Screw the PTFE tube 16 onto the lower side of the PTFE tube 19, and fit the stainless steel outer tube 14 onto the outside of the stainless steel inner tube 15. Connect the PTFE tube 16, the bottom fixing seat 18 and the stainless steel outer tube 14 with nut screws.

[0047] The first temperature probe 17 is placed at the bottom of the stainless steel inner tube 15 and fixed in the bottom fixing seat 18.

[0048] The connecting parts and sensor assembly are inserted from the top of the main body 10, so that the base 12 is located in the first cylindrical groove and the second cylindrical groove, the polytetrafluoroethylene tube 19 is located in the third cylindrical groove, and the lower side of the polytetrafluoroethylene tube 16 extends to the outside of the main body 10.

[0049] The second temperature probe 13 is fixed at the corresponding position on the lower end face of the main body 10, and the connecting cable is introduced into the interior of the main body 10 through the wiring groove and the wire hole, and electrically connected to the PCB circuit board 4.

[0050] Working principle of this utility model:

[0051] The main body 10 adopts a polyurethane foam cylindrical structure, with wiring grooves and through holes on its outer side for wiring organization; a stainless steel cover plate 8 is fixed to the upper side of the main body 10, and an equipment box is placed in the groove. The equipment box is composed of an upper cover 2, an outer shell 5, and a lower cover 7 that fit together. The lithium battery 3 in the upper cavity powers the PCB circuit board 4, and the first PCB connecting board 6 in the lower cavity contacts the second PCB connecting board 11 of the connecting component through a retractable pin to achieve electrical connection; the lower side of the base 12 of the connecting component is threaded with a polytetrafluoroethylene tube 19, and the lower side of the polytetrafluoroethylene tube 19 is threaded with a polytetrafluoroethylene tube 1 6. The lower side is fixed with a stainless steel outer tube 14 and an inner stainless steel inner tube 15. The first temperature probe 17 in the bottom fixing seat 18 extends into the stainless steel inner tube 15 to monitor the liquid nitrogen temperature. The second temperature probe 13 on the lower side of the main body 10 assists in monitoring the ambient temperature. When the equipment is working, the first temperature probe 17 and the second temperature probe 13 collect temperature data, which are processed by the PCB circuit board 4 and displayed by the PET film 1. The stainless steel handle 9 facilitates the handling of the equipment. The overall structure is connected by threads, snap-fit ​​and other means to ensure stable monitoring and facilitate maintenance.

[0052] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A liquid nitrogen monitoring device, characterized in that, include: The main body (10) has a device box embedded on its upper side. The lower side of the device box is connected to a sensor assembly via a connecting component. The upper end of the sensor assembly is located inside the main body (10), and the lower end of the sensor assembly extends to the outside of the main body (10).

2. The liquid nitrogen monitoring device according to claim 1, characterized in that: The main body (10) is a cylindrical structure formed by polyurethane foam, and several wiring grooves and wiring holes are provided on the outer side of the main body (10).

3. The liquid nitrogen monitoring device according to claim 1, characterized in that: A stainless steel cover plate (8) is fixed on the upper side of the main body (10). A downward recessed groove is provided in the center of the upper side of the stainless steel cover plate (8). The equipment box is located in the groove. A round hole is opened in the center of the bottom of the groove. The connecting component passes through the round hole.

4. A liquid nitrogen monitoring device according to claim 1 or 3, characterized in that: The device box includes an upper cover (2), an outer shell (5), and a lower cover (7) arranged sequentially from top to bottom. The upper cover (2) and the outer shell (5) are engaged with each other, and the outer shell (5) and the lower cover (7) are engaged with each other. An upper cavity is formed between the upper cover (2) and the outer shell (5), and a lower cavity is formed between the outer shell (5) and the lower cover (7). A lithium battery (3) and a PCB circuit board (4) are arranged in the upper cavity. A first PCB connecting board (6) is arranged in the lower cavity. The first PCB connecting board (6) is engaged in the middle of the upper side of the lower cover (7). A PET film (1) is also fixed on the upper side of the upper cover (2).

5. A liquid nitrogen monitoring device according to claim 4, characterized in that: The connecting component includes a base (12), and a second PCB connecting board (11) is mounted in the upper recess of the base (12). A retractable pin is welded on the first PCB connecting board (6), and the retractable pin is in contact with the contact on the second PCB connecting board (11).

6. A liquid nitrogen monitoring device according to claim 5, characterized in that: The sensor assembly includes a polytetrafluoroethylene tube (19) screwed onto the lower side of a base (12). The polytetrafluoroethylene tube (19) is vertically disposed inside the main body (10). A polytetrafluoroethylene tube (16) is screwed onto the lower side of the polytetrafluoroethylene tube (19). A stainless steel outer tube (14) is fixed to the lower side of the polytetrafluoroethylene tube (16). A stainless steel inner tube (15) is disposed inside the stainless steel outer tube (14). A bottom fixing seat (18) is fixed to the lower end of the stainless steel outer tube (14) and the stainless steel inner tube (15). A first temperature probe (17) is disposed inside the bottom fixing seat (18). The upper side of the first temperature probe (17) extends into the stainless steel inner tube (15).

7. A liquid nitrogen monitoring device according to claim 3, characterized in that: A second temperature probe (13) is fixed on the lower end face of the main body (10).

8. A liquid nitrogen monitoring device according to claim 3, characterized in that: Two stainless steel handles (9) are fixed on the stainless steel cover plate (8) and are arranged opposite each other.

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