Ultralow-temperature cold trap device

Abstract

The utility model provides an ultralow-temperature cold trap device which comprises a cold trap main body, a liquid nitrogen control system and a liquid nitrogen tank, the cold trap main body comprises a cold trap outer cover and a cold trap cylinder arranged in the cold trap outer cover; a thermal insulation material is filled between the cold trap outer cover and the cold trap cylinder to form a thermal insulation layer; the cold trap cylinder comprises a cold trap outer cylinder and a cold trap inner cylinder welded in the cold trap outer cylinder, and a gap between the cold trap outer cylinder and the cold trap inner cylinder forms a liquid nitrogen interlayer; the liquid nitrogen interlayer is divided into an upper area, a middle area and a lower area which are mutually independent through partition plates welded to the outer wall of the cold trap inner cylinder, each area is provided with a liquid nitrogen inlet connector, a temperature sensor and an exhaust flange connector, and the temperature sensors are electrically connected with the liquid nitrogen control system. The liquid nitrogen tank is communicated with the liquid nitrogen inlet connector through the liquid nitrogen control system. The ultra-low temperature field source can provide a uniform and stable ultra-low temperature field source capable of automatically adjusting the temperature for the low-temperature reaction kettle, and the lowest temperature can reach-100 DEG C.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold traps, and in particular relates to an ultra-low temperature cold trap device. Background Art

[0002] Some chemical reactions require low-temperature reactions within a reactor, controlling the reaction temperature to -40°C to -70°C or even lower. Due to the volume limitations of conventional low-temperature reactors, large amounts of material must be reacted in small amounts and multiple times to complete the reaction, significantly increasing reaction time and costs. To address this issue, many research institutes and companies have designed larger, longer, or even smaller reactors. This has led to the need to redesign the ultra-low temperature field source to accommodate larger, longer, or even smaller reactors. Utility Model Content

[0003] The utility model aims to solve the technical problems existing in the prior art and provides an ultra-low temperature cold trap device.

[0004] A super-low temperature cold trap device comprises: a cold trap body, a liquid nitrogen control system, and a liquid nitrogen tank.

[0005] The cold trap body comprises a cold trap outer cover and a cold trap cylinder arranged in the cold trap outer cover; a heat-insulating material is filled between the cold trap outer cover and the cold trap cylinder to form a heat-insulating layer;

[0006] The cold trap cylinder comprises a cold trap outer cylinder and a cold trap inner cylinder welded inside the cold trap outer cylinder, and a gap between the cold trap outer cylinder and the cold trap inner cylinder forms a liquid nitrogen interlayer;

[0007] The liquid nitrogen interlayer is divided into three independent areas of upper, middle and lower parts by a partition plate welded on the outer wall of the cold trap inner cylinder. Each area is equipped with a liquid nitrogen inlet joint, a temperature sensor and an exhaust flange interface. The temperature sensor is electrically connected to the liquid nitrogen control system, and the liquid nitrogen tank is connected to the liquid nitrogen inlet joint through the liquid nitrogen control system.

[0008] As a preferred solution of this embodiment, a plurality of liquid nitrogen guide plates are intermittently welded inside each of the three areas of the liquid nitrogen interlayer, and adjacent liquid nitrogen guide plates are welded to form an S-shaped liquid nitrogen flow channel.

[0009] As a preferred solution of this embodiment, the cold trap tube further includes a top sealing flange, connecting studs, and a plurality of first load-bearing columns;

[0010] The cold trap outer cover includes a straight cylinder, a connecting flange welded to the top of the straight cylinder, and a base plate welded to the bottom of the straight cylinder;

[0011] The top sealing flange and the connecting flange are fixedly connected via the connecting studs; and both ends of the first load-bearing column are respectively welded to the bottom of the cold trap tube and the base plate.

[0012] As a preferred solution of this embodiment, the cold trap outer cylinder includes a first upper cylinder, a first ring plate, a first lower cylinder, and a cold trap outer cylinder bottom plate;

[0013] The lower edge of the first upper cylinder is welded to the outer edge of the first ring plate, and the upper edge of the first lower cylinder is welded to the inner edge of the first ring plate to form a variable diameter structure;

[0014] The outer edge of the bottom plate of the cold trap outer cylinder is welded to the lower edge of the first lower cylinder.

[0015] As a preferred solution of this embodiment, the cold trap inner cylinder includes a second ring plate, a second upper cylinder, a second lower cylinder, a cold trap inner cylinder bottom plate, and a second load-bearing column;

[0016] The lower edge of the second upper cylinder is welded to the outer edge of the second ring plate, and the upper edge of the second lower cylinder is welded to the inner edge of the second ring plate to form a variable diameter structure;

[0017] The outer edge of the bottom plate of the cold trap inner cylinder is welded to the lower edge of the second lower cylinder;

[0018] The second load-bearing columns include a plurality of columns, which are uniformly welded between the bottom plate of the cold trap inner tube and the bottom plate of the cold trap outer tube.

[0019] As a preferred solution of this embodiment, the cold trap cover further comprises: a plurality of ribs evenly arranged on the circumference of the outer wall of the straight cylinder, the ribs being welded to the outer wall of the straight cylinder and the upper surface of the base plate respectively.

[0020] As a preferred solution of this embodiment, the cold trap outer cover also includes at least one first insulation layer pouring port and at least three second insulation layer pouring ports, the first insulation layer pouring port is opened at the top of the straight cylinder, and the second insulation layer pouring port is opened on the straight cylinder, corresponding to three independent upper, middle and lower areas of the liquid nitrogen interlayer respectively.

[0021] The beneficial effect of the utility model is that the solution can provide a uniform, stable and automatically temperature-adjustable ultra-low temperature field source for the low-temperature reactor, and the lowest temperature can reach -100°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of an ultra-low temperature cold trap device of the utility model;

[0023] Figure 2 Schematic diagram of the main structure of the cold trap;

[0024] Figure 3 Schematic diagram of the cold trap structure;

[0025] Figure 4 This is a schematic diagram of the cold trap inner cylinder structure;

[0026] Figure 5 This is a schematic diagram of the cold trap outer cylinder structure;

[0027] Figure 6 Schematic diagram of the cold trap cover structure;

[0028] Including: 1. Cold trap body; 2. Liquid nitrogen control system; 3. Liquid nitrogen tank;

[0029] 1.1. PT100 temperature sensor; 1.2. Sealing plate for temperature sensor mounting hole; 1.3. Sealing plate for pipe joint mounting hole; 1.4. Liquid nitrogen pipe joint; 1.5. Sealing plate for pouring port of first insulation layer; 1.6. Sealing plate for pouring port of second insulation layer; 1.7. Exhaust bellows; 1.8. Sealing plate for bellows mounting hole; 1.9. Cold trap; 1.10. Insulation layer; 1.11. Cold trap cover;

[0030] 1.9.1. Top sealing flange; 1.9.2. Connecting studs; 1.9.3. Liquid nitrogen inlet connector; 1.9.4. First load-bearing column; 1.9.5. Exhaust flange interface; 1.9.6. Cold trap inner tube; 1.9.7. Cold trap outer tube; 1.9.8. Temperature sensor connector;

[0031] 1.9.6.1, second ring plate; 1.9.6.2, second upper cylinder; 1.9.6.3, second lower cylinder; 1.9.6.4, liquid nitrogen guide plate; 1.9.6.5, dividing plate; 1.9.6.6, liquid nitrogen flow channel; 1.9.6.7, cold trap inner cylinder bottom plate; 1.9.6.8, second load-bearing column; 1.9.6.9, cold trap outer cylinder bottom plate;

[0032] 1.9.7.1, first upper cylinder; 1.9.7.2, first ring plate; 1.9.7.3, first lower cylinder;

[0033] 1.11.1. Connecting flange; 1.11.2. First insulation layer pouring port; 1.11.3. Second insulation layer pouring port; 1.11.4. Straight cylinder; 1.11.5. Rib plate; 1.11.6. Base plate. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] See also Figures 1 to 6As shown, an embodiment of the present invention provides an ultra-low temperature cold trap device, including a cold trap body 1, a liquid nitrogen control system 2, and a liquid nitrogen tank 3. The cold trap body 1 is assembled by a PT100 temperature sensor 1.1, a temperature sensor mounting hole sealing plate 1.1, a pipe joint mounting hole sealing plate 1.3, a liquid nitrogen pipe joint 1.4, a first insulation layer pouring port sealing plate 1.5, a second insulation layer pouring port sealing plate 1.6, an exhaust bellows 1.7, a bellows mounting hole sealing plate 1.8, a cold trap cylinder 1.9, an insulation layer 1.10, and a cold trap outer cover 1.11.

[0036] Cold trap tube 1.9 is welded together by top sealing flange 1.9.1, connecting studs 1.9.2, liquid nitrogen inlet connector 1.9.3, support column 1.9.4, exhaust flange interface 1.9.5, cold trap inner tube 1.9.6, cold trap outer tube 1.9.7, and temperature sensor connector 1.9.8. Cold trap inner tube 1.9.6 is welded together by second ring plate 1.9.6.1, second upper tube 1.9.6.2, second lower tube 1.9.6.3, liquid nitrogen guide plate 1.9.6.4, partition plate 1.9.6.5, cold trap inner tube bottom plate 1.9.6.7, and second support column 1.9.6.8. Cold trap outer tube 1.9.7 is welded together by first upper tube 1.9.7.1, first ring plate 1.9.7.2, first lower tube 1.9.7.3, and cold trap outer tube bottom plate 1.9.6.9. The cold trap housing 1.11 is welded together by a connecting flange 1.11.1, a straight cylinder 1.11.4, a rib 1.11.5, and a base plate 1.11.6. The rib 1.11.5 is welded to the outer wall of the straight cylinder 1.11.4 and the upper surface of the base plate 1.11.6 to ensure the structural strength and overall stability of the cold trap body 1.

[0037] See also Figures 1 to 6 As shown, the cold trap body 1, the liquid nitrogen control system 2, and the liquid nitrogen tank 3 are combined to form an ultra-low temperature cold trap device. The cold trap inner tube 1.9.6 and the cold trap outer tube 1.9.7 are welded together, and the gap between the two forms a liquid nitrogen interlayer. The liquid nitrogen interlayer is divided into three areas, upper, middle, and lower, by a partition plate 1.9.6.5 welded to the outer wall of the cold trap inner tube 1.9.6. Each area is provided with a liquid nitrogen guide plate 1.9.6.4, a liquid nitrogen inlet connector 1.9.3, a PT100 temperature sensor 1.1, and an exhaust flange interface 1.9.5 to ensure the temperature uniformity of the entire cold trap body. The three liquid nitrogen inlet connectors 1.9.3 of the cold trap are connected to the infusion pipe of the liquid nitrogen control system 2, and the liquid nitrogen control system 2 is connected to the liquid nitrogen tank 3; the liquid nitrogen tank 3 is a self-pressurized liquid nitrogen tank.

[0038] In this embodiment, this ultra-low temperature cold trap device can provide a uniform, stable, and automatically temperature-controlled ultra-low temperature field source for the reactor inserted into the cold trap, with a minimum temperature of -100°C. In this embodiment, there are 15 first load-bearing columns 1.9.4 and 15 second load-bearing columns 1.9.6.8. With these 15 first load-bearing columns 1.9.4 and 15 second load-bearing columns 1.9.6.8, the cold trap has a load capacity of up to three tons. The interlayer between the cold trap outer tube 1.9.7 and the cold trap outer cover 1.11 is filled with an insulation layer 1.10. In this embodiment, this insulation layer 1.10 utilizes a polyurethane foam insulation layer, effectively isolating the low temperature inside the cold trap from the effects of ambient temperature.

[0039] This embodiment is further optimized by intermittently welding multiple liquid nitrogen guide plates 1.9, 6, and 4 within each of the three zones of the liquid nitrogen interlayer. Adjacent guide plates 1.9, 6, and 4 are welded together to form an S-shaped liquid nitrogen flow channel 1.9, 6, and 6. This allows the liquid nitrogen to flow along an S-shaped path within each zone, improving the uniformity of the liquid nitrogen flow and slowing its evaporation rate. This not only enhances the cooling effect but also reduces liquid nitrogen usage. Both the outer and inner cold traps feature a variable diameter structure to accommodate reactors with varying diameters and shapes.

[0040] See also Figures 1 to 6 As shown, in the outer tube of the cold trap, the lower edge of the first upper tube 1.9.7.1 is welded to the outer edge of the first ring plate 1.9.7.2, and the upper edge of the first lower tube 1.9.7.3 is welded to the inner edge of the first ring plate 1.9.7.2, forming a variable diameter structure. In the inner tube of the cold trap, the lower edge of the second upper tube (1.9.6.2) is welded to the outer edge of the second ring plate (1.9.6.1), and the upper edge of the second lower tube (1.9.6.3) is welded to the inner edge of the second ring plate (1.9.6.1), forming a variable diameter structure.

[0041] As a preferred embodiment, the cold trap housing 1.11 is provided with at least one first insulation layer pouring port 1.11.2 and at least three second insulation layer pouring ports 1.11.3. The first insulation layer pouring port 1.11.2 is located at the top of the straight cylindrical body 1.11.4, while the second insulation layer pouring ports 1.11.3 are located on the straight cylindrical body 1.11.4, corresponding to three independent regions of the liquid nitrogen interlayer: the top, middle, and bottom. The first insulation layer pouring port 1.11.2 and the second insulation layer pouring port 1.11.3 enable segmented pouring of the insulation layer, resulting in more uniform polyurethane foaming and better insulation.

[0042] During assembly of the ultra-low-temperature cold trap device provided in this embodiment, the PT100 temperature sensor 1.1, liquid nitrogen pipe connector 1.4, and exhaust bellows 1.7 are installed after the cold trap barrel 1.9 and cold trap housing 1.11 are assembled. This prevents the cold trap barrel 1.9 from being unable to fit within the cold trap housing 1.11. After the PT100 temperature sensor 1.1, liquid nitrogen pipe connector 1.4, and exhaust bellows 1.7 are installed, the polyurethane foam insulation layer 1.10 is cast in sections to ensure the thermal insulation of the cold trap body 1. After the polyurethane foam insulation layer 1.10 is poured in sections, the temperature sensor mounting hole sealing plate 1.2, the pipe joint mounting hole sealing plate 1.3, the corrugated pipe mounting hole sealing plate 1.8, the first insulation layer pouring port sealing plate 1.5, and the second insulation layer pouring port sealing plate 1.6 are installed to ensure that the polyurethane foam insulation layer 1.10 is not exposed on the cold trap body 1 after the polyurethane foam insulation layer 1.10 is poured.

[0043] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0044] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0045] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. An ultra-low temperature cold trap device, characterized in that: include: Cold trap body (1), liquid nitrogen control system (2), liquid nitrogen tank (3); The cold trap body (1) comprises a cold trap outer cover (1.11) and a cold trap cylinder (1.9) arranged inside the cold trap outer cover (1.11); a heat-insulating material is filled between the cold trap outer cover (1.11) and the cold trap cylinder (1.9) to form a heat-insulating layer (1.10); The cold trap cylinder (1.9) comprises a cold trap outer cylinder (1.9.7) and a cold trap inner cylinder (1.9.6) welded inside the cold trap outer cylinder (1.9.7), and a gap between the cold trap outer cylinder (1.9.7) and the cold trap inner cylinder (1.9.6) forms a liquid nitrogen interlayer; The liquid nitrogen interlayer is divided into three independent upper, middle and lower areas by a partition plate (1.9.6.5) welded to the outer wall of the cold trap inner cylinder (1.9.6). Each area is equipped with a liquid nitrogen inlet connector (1.9.3), a temperature sensor (1.1) and an exhaust flange interface (1.9.5). The temperature sensor (1.1) is electrically connected to the liquid nitrogen control system (2). The liquid nitrogen tank (3) is connected to the liquid nitrogen inlet connector (1.9.3) via the liquid nitrogen control system (2).

2. The ultra-low temperature cold trap device according to claim 1, characterized in that: A plurality of liquid nitrogen guide plates (1.9.6.4) are intermittently welded inside each of the three areas of the liquid nitrogen interlayer, and adjacent liquid nitrogen guide plates (1.9.6.4) are welded to form an S-shaped liquid nitrogen flow channel (1.9.6.6).

3. The ultra-low temperature cold trap device according to claim 1, characterized in that: The cold trap cylinder (1.9) further comprises a top sealing flange (1.9.1), connecting studs (1.9.2), and a plurality of first load-bearing columns (1.9.4); The cold trap housing (1.11) includes a straight cylinder (1.11.4), a connecting flange (1.11.1) welded to the top of the straight cylinder (1.11.4), and a base plate (1.11.6) welded to the bottom of the straight cylinder (1.11.4); The top sealing flange (1.9.1) and the connecting flange (1.11.1) are fixedly connected via the connecting studs (1.9.2); and both ends of the first load-bearing column (1.9.4) are respectively welded to the bottom of the cold trap cylinder (1.9) and the base plate (1.11.6).

4. The ultra-low temperature cold trap device according to claim 3, characterized in that: The cold trap outer cylinder (1.9.7) includes a first upper cylinder (1.9.7.1), a first ring plate (1.9.7.2), a first lower cylinder (1.9.7.3), and a cold trap outer cylinder bottom plate (1.9.6.9); The lower edge of the first upper cylinder (1.9.7.1) is welded to the outer edge of the first ring plate (1.9.7.2), and the upper edge of the first lower cylinder (1.9.7.3) is welded to the inner edge of the first ring plate (1.9.7.2) to form a variable diameter structure; The outer edge of the bottom plate (1.9.6.9) of the cold trap outer cylinder is welded to the lower edge of the first lower cylinder (1.9.7.3).

5. The ultra-low temperature cold trap device according to claim 4, characterized in that: The cold trap inner cylinder (1.9.6) includes a second ring plate (1.9.6.1), a second upper cylinder (1.9.6.2), a second lower cylinder (1.9.6.3), a cold trap inner cylinder bottom plate (1.9.6.7), and a second load-bearing column (1.9.6.8); The lower edge of the second upper cylinder (1.9.6.2) is welded to the outer edge of the second ring plate (1.9.6.1), and the upper edge of the second lower cylinder (1.9.6.3) is welded to the inner edge of the second ring plate (1.9.6.1) to form a variable diameter structure; The outer edge of the bottom plate (1.9.6.7) of the cold trap inner cylinder is welded to the lower edge of the second lower cylinder (1.9.6.3); The second load-bearing columns (1.9.6.8) include multiple columns, which are evenly welded between the bottom plate of the inner tube of the cold trap (1.9.6.7) and the bottom plate of the outer tube of the cold trap (1.9.6.9).

6. The ultra-low temperature cold trap device according to claim 3, characterized in that: The cold trap outer cover (1.11) further comprises: a plurality of ribs (1.11.5) evenly arranged on the circumference of the outer wall of the straight cylinder (1.11.4), and the ribs (1.11.5) are respectively welded to the outer wall of the straight cylinder (1.11.4) and the upper surface of the base plate (1.11.6).

7. The ultra-low temperature cold trap device according to claim 3, characterized in that: The cold trap cover (1.11) further comprises at least one first insulation layer pouring port (1.11.2) and at least three second insulation layer pouring ports (1.11.3), wherein the first insulation layer pouring port (1.11.2) is provided at the top of the straight cylindrical body (1.11.4), and the second insulation layer pouring ports (1.11.3) are provided on the straight cylindrical body (1.11.4), respectively corresponding to three mutually independent regions at the top, middle and bottom of the liquid nitrogen interlayer.

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