Filling device for liquid nitrogen production

Abstract

The utility model relates to a filling device for liquid nitrogen production, which belongs to the technical field of liquid nitrogen production and comprises a filling transfer pipe, a pressure regulating mechanism is arranged on the filling transfer pipe, and the pressure regulating mechanism comprises a miniature air compressor fixedly mounted at the top of the filling transfer pipe. And an air inlet pipe extending into the filling transfer pipe is fixedly mounted at the air outlet end of the micro air compressor. According to the filling device for liquid nitrogen production, a micro air compressor and an air inlet pipe are arranged on a filling transfer pipe, a first one-way valve and a proportional electromagnetic valve are arranged on the air inlet pipe, and the interior of the filling transfer pipe can be pressurized through the micro air compressor during use, so that the flowing speed of liquid nitrogen in the filling transfer pipe can be increased; and the proportional electromagnetic valve can be used for adjusting the internal pressure of the filling transfer pipe, so that the internal pressure of the filling transfer pipe is kept at a proper numerical value.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen production technology, specifically to a filling device for liquid nitrogen production. Background Art

[0002] Liquid nitrogen is a liquid obtained by dispensing inert, colorless, odorless, non-corrosive, and non-flammable nitrogen gas in an extremely low temperature environment. Liquid nitrogen is an inert, colorless, tasteless, low-viscosity, non-corrosive, non-flammable, and extremely low-temperature transparent liquid. Liquid nitrogen dispensing equipment is mainly used to safely and efficiently dispense liquid nitrogen into various containers, such as gas cylinders, storage tanks, or other equipment.

[0003] Announcement No. CN221035222U discloses a liquid nitrogen dispensing device, comprising a dispensing nozzle, a flow rate control component, a rebound component, an adjusting component, and an abutment assembly. The flow rate control component is rotatably connected to the dispensing nozzle, and the rebound component is slidably connected to the dispensing nozzle. The rebound component and the adjusting component are fixedly connected. This invention, through the coordinated design of the flow rate control component and the dispensing nozzle, can control and adjust the liquid nitrogen dispensing amount according to different beverage containers. By rotating and adjusting the rotating plate, the flow rate orifice can be aligned with the dispensing tube, achieving control over the flow rate during different liquid nitrogen dispensing operations. The coordinated design of the rebound component, adjusting component, and abutment assembly enables low-cost and convenient dispensing of liquid nitrogen into individual beverage containers, avoiding ineffective dispensing and waste during beverage container transport intervals.

[0004] The aforementioned patent addresses the shortcomings of existing liquid nitrogen production and dispensing devices, which cannot conveniently adjust the flow rate and volume of the dispensed liquid nitrogen and cannot meet the dispensing needs of beverage containers of different sizes. This application provides another implementation scheme to address the problems raised in the aforementioned patent. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a liquid nitrogen production filling device that has the advantage of easy adjustment of the liquid nitrogen filling flow rate and volume. It solves the problem that existing liquid nitrogen production filling devices cannot conveniently adjust the filling flow rate and volume of liquid nitrogen during use, and cannot meet the filling needs of beverage containers of different sizes.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a filling device for liquid nitrogen production, comprising a filling transfer pipe, wherein a pressure regulating mechanism is provided on the filling transfer pipe;

[0007] The pressure regulating mechanism includes a miniature air compressor fixedly installed at the top of the filling transfer pipe. An air inlet pipe extending into the filling transfer pipe is fixedly installed at the outlet end of the miniature air compressor. A first one-way valve located inside the filling transfer pipe is fixedly installed at the bottom of the air inlet pipe. A connecting pipe extending into the filling transfer pipe is fixedly installed on the surface of the filling transfer pipe. A second one-way valve located inside the filling transfer pipe is fixedly installed at the bottom of the connecting pipe. A proportional solenoid valve is fixedly installed inside the air inlet pipe.

[0008] Furthermore, a threaded connecting pipe that communicates with the inside of the refueling transfer pipe is fixedly installed at the bottom of the refueling transfer pipe, and a conical refueling nozzle that communicates with the inside of the threaded connecting pipe is fixedly installed at the bottom of the threaded connecting pipe. A threaded sleeve is threadedly connected to the outer surface of the threaded connecting pipe, and a groove is opened inside the threaded sleeve. A refueling pipe that penetrates to the outer surface of the threaded sleeve is fixedly installed at the bottom of the groove.

[0009] The advantages of adopting the above-mentioned further scheme are: it is easy to adapt to containers of different diameters and to add liquid nitrogen into different containers.

[0010] Furthermore, the internal shape of the slot is circular, and the conical dispensing nozzle is adapted to the slot.

[0011] The beneficial effect of adopting the above-mentioned further solution is that it facilitates close contact between the outer surface of the conical nozzle and the inner side of the slot.

[0012] Furthermore, the maximum outer diameter of the conical nozzle is greater than the inner diameter of the slot, and the minimum outer diameter of the conical nozzle is smaller than the inner diameter of the slot.

[0013] The advantage of adopting the above-mentioned further solution is that it makes it easier to insert the bottom of the conical nozzle into the inside of the slot.

[0014] Furthermore, a transparent observation window is fixedly installed on the surface of the filling transfer tube, and the length of the transparent observation window is adapted to the length of the filling transfer tube.

[0015] The advantage of adopting the above-mentioned further solution is that it facilitates observation of the internal condition of the transfer pipe during refueling.

[0016] Furthermore, the bottom of the filling tube is tapered.

[0017] The advantage of adopting the above-mentioned further solution is that it facilitates the quick insertion of the filling tube into the filling port of the container.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0019] This liquid nitrogen production filling device features a miniature air compressor and an air inlet pipe on the filling transfer pipe. The air inlet pipe is equipped with a first one-way valve and a proportional solenoid valve. During use, the miniature air compressor pressurizes the inside of the filling transfer pipe, thereby increasing the flow rate of liquid nitrogen and thus increasing the flow rate. The proportional solenoid valve regulates the pressure inside the filling transfer pipe, maintaining it at a suitable value.

[0020] This refueling device for liquid nitrogen production, by having a threaded connecting pipe, a conical refueling nozzle, a threaded sleeve, a groove, and a refueling pipe on the refueling transfer pipe, allows the refueling device to be adapted to containers of different diameters by using a refueling pipe with a smaller diameter. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the threaded sleeve structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the threaded connection pipe structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the external appearance of the transfer pipe for the structure of this utility model.

[0025] In the diagram: 1. Filling transfer pipe; 2. Miniature air compressor; 3. Inlet pipe; 4. First check valve; 5. Connecting pipe; 6. Second check valve; 7. Proportional solenoid valve; 8. Threaded connecting pipe; 9. Conical filling nozzle; 10. Threaded sleeve; 11. Slot; 12. Filling pipe; 13. Transparent observation window. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Please see Figures 1 to 4This embodiment of a liquid nitrogen production filling device includes a filling transfer pipe 1, a pressure regulating mechanism on the filling transfer pipe 1, a miniature air compressor 2 fixedly installed at the top of the filling transfer pipe 1, an air inlet pipe 3 fixedly installed at the outlet end of the miniature air compressor 2 extending into the filling transfer pipe 1, a first one-way valve 4 fixedly installed at the bottom of the air inlet pipe 3 located inside the filling transfer pipe 1, a connecting pipe 5 fixedly installed on the surface of the filling transfer pipe 1 extending into the filling transfer pipe 1, a second one-way valve 6 fixedly installed at the bottom of the connecting pipe 5 located inside the filling transfer pipe 1, a proportional solenoid valve 7 fixedly installed inside the air inlet pipe 3, a transparent observation window 13 fixedly installed on the surface of the filling transfer pipe 1, the length of the transparent observation window 13 being adapted to the length of the filling transfer pipe 1 for easy observation of the internal condition of the filling transfer pipe 1, and a tapered bottom of the filling pipe 12 for easy insertion into the filling port of the container.

[0028] A threaded connecting pipe 8, which communicates with the interior of the refueling transfer pipe 1, is fixedly installed at the bottom of the refueling transfer pipe 1. A conical refueling nozzle 9, which communicates with the interior of the threaded connecting pipe 8, is fixedly installed at the bottom of the threaded connecting pipe 8. A threaded sleeve 10 is threadedly connected to the outer surface of the threaded connecting pipe 8. A groove 11 is opened inside the threaded sleeve 10. A refueling pipe 12, which extends through to the outer surface of the threaded sleeve 10, is fixedly installed at the bottom of the groove 11 to facilitate the filling of liquid nitrogen into different containers. The internal shape of the groove 11 is circular. The conical refueling nozzle 9 is adapted to the groove 11 to facilitate close contact between the outer surface of the conical refueling nozzle 9 and the inner side of the groove 11. The maximum outer diameter of the conical refueling nozzle 9 is greater than the inner diameter of the groove 11, and the minimum outer diameter of the conical refueling nozzle 9 is less than the inner diameter of the groove 11, so that the bottom of the conical refueling nozzle 9 can be inserted into the inner side of the groove 11.

[0029] It should be noted that in this embodiment, the openings of the second one-way valve 6 and the first one-way valve 4 both face the bottom of the inner cavity of the filling transfer pipe 1, which can prevent liquid nitrogen from flowing back into the connecting pipe 5 and the air inlet pipe 3.

[0030] It should be noted that the diameter of the filling pipe 12 in this embodiment is smaller than the minimum diameter of the conical filling nozzle 9.

[0031] The working principle of the above embodiment is:

[0032] In use, liquid nitrogen is fed into the filling transfer pipe 1 through the connecting pipe 5. Air is compressed by the micro air compressor 2 and fed into the filling transfer pipe 1 through the air inlet pipe 3, thereby increasing the pressure inside the filling transfer pipe 1. The pressure is used to increase the flow rate of liquid nitrogen inside the filling transfer pipe 1. The proportional solenoid valve 7 is used to regulate the air entering the filling transfer pipe 1, thereby controlling the pressure inside the filling transfer pipe 1. Liquid nitrogen is injected into the container through the conical filling nozzle 9. When it is necessary to fill liquid nitrogen into a container with a smaller diameter, the threaded sleeve 10 is threaded to the threaded connecting pipe 8, so that the bottom of the conical filling nozzle 9 is locked into the slot 11, and the outer surface of the conical filling nozzle 9 is in close contact with the inner surface of the slot 11. Then the filling pipe 12 can be connected to the conical filling nozzle 9. The filling pipe 12 is inserted into the filling port of the container to fill the container with liquid nitrogen.

[0033] The control method of this utility model is through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filling device for liquid nitrogen production, comprising a filling transfer pipe (1), characterized in that: The refueling transfer pipe (1) is equipped with a pressure regulating mechanism; The pressure regulating mechanism includes a miniature air compressor (2) fixedly installed on the top of the filling transfer pipe (1). The outlet end of the miniature air compressor (2) is fixedly installed with an air inlet pipe (3) extending into the interior of the filling transfer pipe (1). The bottom of the air inlet pipe (3) is fixedly installed with a first one-way valve (4) located inside the filling transfer pipe (1). The surface of the filling transfer pipe (1) is fixedly installed with a connecting pipe (5) extending into the interior of the filling transfer pipe (1). The bottom of the connecting pipe (5) is fixedly installed with a second one-way valve (6) located inside the filling transfer pipe (1). The interior of the air inlet pipe (3) is fixedly installed with a proportional solenoid valve (7).

2. The filling device for liquid nitrogen production according to claim 1, characterized in that: The bottom of the filling transfer pipe (1) is fixedly installed with a threaded connecting pipe (8) that communicates with the inside of the filling transfer pipe (1). The bottom of the threaded connecting pipe (8) is fixedly installed with a conical filling nozzle (9) that communicates with the inside of the threaded connecting pipe (8). The outer surface of the threaded connecting pipe (8) is threadedly connected with a threaded sleeve (10). The inside of the threaded sleeve (10) is provided with a groove (11). The bottom of the groove (11) is fixedly installed with a filling pipe (12) that penetrates to the outer surface of the threaded sleeve (10).

3. A filling device for liquid nitrogen production according to claim 2, characterized in that: The internal shape of the slot (11) is circular, and the conical injection nozzle (9) is adapted to the slot (11).

4. A filling device for liquid nitrogen production according to claim 2, characterized in that: The maximum external diameter of the conical nozzle (9) is greater than the internal diameter of the slot (11), the maximum external diameter of the conical nozzle (9) is greater than the internal diameter of the slot (11), and the minimum external diameter of the conical nozzle (9) is less than the internal diameter of the slot (11).

5. A refueling device for liquid nitrogen production according to claim 1, characterized in that: A transparent observation window (13) is fixedly installed on the surface of the filling transfer tube (1), and the length of the transparent observation window (13) is adapted to the length of the filling transfer tube (1).

6. A filling device for liquid nitrogen production according to claim 2, characterized in that: The bottom of the filling tube (12) is tapered.

Images