CN219606758U

CN219606758U - Self-pressurization device for liquid helium infusion

Info

Publication number: CN219606758U
Application number: CN202123125109.2U
Authority: CN
Inventors: 胡平
Original assignee: Wuhan Kule Technology Co ltd
Current assignee: Wuhan Kule Technology Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2023-08-29
Anticipated expiration: 2031-12-13

Abstract

The utility model relates to a liquid helium pressurizing technology, in particular to a self-pressurizing device for liquid helium infusion. The self-pressurizing device for liquid helium infusion comprises a heat exchange device and a helium pipeline, wherein the heat exchange device is provided with an inner cavity and an air inlet and outlet nozzle communicated with the inner cavity, one end of the helium pipeline is used for being connected and communicated with an air outlet of the standard liquid helium Dewar, and the other end of the helium pipeline is connected and communicated with the air inlet and outlet. The advantages are that: the structure design is simple and reasonable, and the problems of inconvenient self-pressurization operation, resource waste and the like in the conventional liquid helium infusion process are solved.

Description

Self-pressurization device for liquid helium infusion

Technical Field

The utility model relates to a liquid helium pressurizing technology, in particular to a self-pressurizing device for liquid helium infusion.

Background

Many physical experiments, scientific instruments, nuclear magnetic resonance instruments and the like can use liquid helium, the liquid helium is usually required to be filled in a special liquid helium storage dewar due to the characteristics of low temperature of 4.2K, high volatility and the like, when the liquid helium needs to be used, the storage dewar is conveyed to the vicinity of an instrument or a device to be used, the special liquid helium infusion tube is used for connecting the storage dewar with the instrument or the device to be used, the liquid helium infusion tube is inserted into the bottom of the liquid helium storage dewar, the tail end of the liquid helium infusion tube is completely soaked by the liquid helium, the air pressure inside the liquid helium experiment dewar needs to be increased, and the larger air pressure provides a driving force to transmit the liquid helium into the instrument or the device to be used. The current common mode is to connect a high-purity helium steel bottle externally on the interface of the storage Chu Duwa through a pipeline, a pressure reducing valve and the like, and after normal-temperature helium in the steel bottle enters the inside of the storage Dewar, liquid helium in the Dewar volatilizes when meeting heat, and the pressure becomes large so as to provide transfusion driving force. Helium belongs to non-renewable resources and is expensive, when the method is adopted for pipetting, a helium steel bottle is required to be attached each time, and if high-purity helium in the steel bottle is exhausted in the pipetting process, a new helium steel bottle is required to be replaced again, so that the operation is inconvenient, and valuable helium resources are wasted.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a self-pressurizing device for liquid helium infusion, which effectively overcomes the defects of the prior art.

The technical scheme for solving the technical problems is as follows:

the self-pressurizing device for liquid helium infusion comprises a heat exchange device and a helium pipeline, wherein the heat exchange device is provided with an inner cavity and an air inlet and exhaust nozzle communicated with the inner cavity, one end of the helium pipeline is used for being connected and communicated with an air outlet of a liquid helium Dewar, and the other end of the helium pipeline is connected and communicated with the air inlet and exhaust nozzle.

On the basis of the technical scheme, the utility model can be improved as follows.

Further, a stop valve is communicated with the helium pipeline.

Further, the helium pipeline comprises a first copper pipe and a second copper pipe, the stop valve is communicated between the first copper pipe and the second copper pipe, one end of the first copper pipe, which is far away from the stop valve, is connected and communicated with the air inlet and outlet nozzle, and one end of the second copper pipe, which is far away from the stop valve, is connected and communicated with the air inlet and outlet nozzle.

Further, one end of the first copper pipe far away from the stop valve is connected with a joint component, the joint component comprises a screw KF joint and a KF joint sleeve, the KF joint sleeve is connected to one end of the first copper pipe far away from the stop valve, the KF interface of the screw KF joint sleeve is in butt joint with the KF interface of the KF joint sleeve, the joint of the screw KF joint sleeve and the KF joint sleeve is hooped by the KF clamp, and the screw joint of the screw KF joint sleeve is used for being in screw connection with an exhaust port of a liquid helium Dewar.

Further, one end of the second copper pipe far away from the stop valve is connected and communicated with the air inlet and outlet nozzle through a pagoda clamping sleeve connector.

Further, the heat exchanging device is an air bag, and the air bag is connected with the air inlet and outlet nozzle.

The beneficial effects are that: the structure design is simple and reasonable, and the problems of inconvenient self-pressurization operation, resource waste and the like in the conventional liquid helium infusion process are solved.

Drawings

FIG. 1 is a schematic diagram of a self-pressurizing device for liquid helium infusion of the present utility model;

FIG. 2 is a schematic diagram of a thread-transfer KF fitting in a self-pressurizing device for liquid helium infusion of the present utility model;

FIG. 3 is a schematic diagram of the structure of a KF adapter sleeve joint in the self-pressurizing device for liquid helium infusion of the present utility model;

FIG. 4 is a schematic diagram of the structure of a shut-off valve in the self-pressurizing device for liquid helium infusion of the present utility model;

fig. 5 is a schematic structural view of a pagoda ferrule fitting in a self-pressurizing device for liquid helium infusion of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. a heat exchange device; 2. a helium line; 3. a stop valve; 11. an air inlet and outlet nozzle; 21. a first copper tube; 22. a second copper tube; 41. a KF connector is screwed; 42. KF adapter sleeve joint; 221. pagoda clamping sleeve joint; 411. KF clamp.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

Examples: as shown in fig. 1, the self-pressurizing device for liquid helium infusion of the present embodiment includes a heat exchange device 1 and a helium pipeline 2, wherein the heat exchange device 1 has an inner cavity and an air inlet and outlet nozzle 11 communicating with the inner cavity, one end of the helium pipeline 2 is used for being connected and communicated with an air outlet of the liquid helium dewar, and the other end is connected and communicated with the air inlet and outlet nozzle 11.

The operation pressurization process comprises the following steps:

step one, connecting one end of a helium pipeline 2 with an exhaust port of a liquid helium Dewar;

step two, a valve at an exhaust port of the liquid helium Dewar is opened, so that helium in the liquid helium Dewar volatilizes and enters the heat exchange device 1;

and thirdly, after the helium in the heat exchange device 1 exchanges heat with the external environment fully, reversely inputting the helium into the liquid helium Dewar, and closing a valve at an exhaust port of the liquid helium Dewar to complete pressurization.

After pressurization is finished, a pipeline connecting instrument (or an instrument is connected in advance) of the liquid helium Dewar infusion port is opened, the infusion valve is opened, liquid helium is conveyed, after the pressure is insufficient, the operation steps are repeated, the pressurization is performed again, the whole device is simple and reasonable in structural design, the problems that the self-pressurization operation is inconvenient, the resource is wasted and the like in the existing liquid helium infusion process are solved, the operation process is simple and convenient, a liquid helium steel bottle is not required to be carried in transportation, and the transportation difficulty and the transportation cost are reduced.

As a preferred embodiment, the helium line 2 is provided with a shutoff valve 3 in communication therewith.

In this embodiment, the on-off of the helium pipeline 2 can be controlled through the stop valve 3, the stop valve 3 can be closed after helium gas in the liquid helium dewar enters the heat exchange device 1, and the stop valve 3 is opened for reverse conveying after sufficient heat exchange, so that the operation is facilitated.

As a preferred embodiment, the helium line 2 includes a first copper pipe 21 and a second copper pipe 22, the stop valve 3 is provided in communication between the first copper pipe 21 and the second copper pipe 22, one end of the first copper pipe 21 away from the stop valve 3 is connected to and communicates with the air inlet/outlet nozzle 11, and one end of the second copper pipe 22 away from the stop valve 3 is connected to and communicates with the air inlet/outlet nozzle 11.

In this embodiment, the helium line 2 is a segmented two-section copper tube, which facilitates connection to the shut-off valve 3 and is simpler to assemble.

In the above embodiment, the first copper tube 21 and the second copper tube 22 are hollow metal copper tubes, and straight tubes, curved tubes or any other shape can be used according to the requirements.

Generally, the structure of the stop valve 3 is shown in fig. 4, and includes a valve body, a valve operating handle (denoted by a in the figure) provided at the upper portion of the valve body, and a ferrule interface (denoted by b in the figure) provided at two interfaces of the valve body, by which good sealing and quick connection can be achieved with the corresponding end portions of the first copper pipe 21 and the second copper pipe 22.

Of course, in this embodiment, the stop valve 3 may be of a straight-through type or a 90 ° angle type, or may be of any other angle shape.

As a preferred embodiment, a joint assembly is connected to an end of the first copper pipe 21 away from the stop valve 3, the joint assembly includes a KF adapter 41 and a KF adapter 42, a ferrule (denoted as c in the figure) of the KF adapter 42 is connected to an end of the first copper pipe 21 away from the stop valve 3, a KF interface (denoted as d in the figure) of the KF adapter 41 is abutted with a KF interface (denoted as e in the figure) of the KF adapter 42, and a joint of the two is tightened by a KF ferrule 411, and a screw interface (denoted as f in the figure) of the KF adapter 41 is used for screw connection with an exhaust port of the liquid helium dewar.

In this embodiment, the screw-thread KF adapter 41 is matched with the vent (screw thread port) of the liquid helium dewar, and the two are sealed fast, then, the through-connection is completed by the KF adapter 42 and the screw-thread KF adapter 41, and the quick-connection is completed by the ferrule of the KF adapter 42 and the corresponding end of the first copper pipe 21, so that the good butt joint (sealing butt joint) between pipelines is facilitated.

In this embodiment, one end of the second copper pipe 22 away from the stop valve 3 is connected and communicated with the air inlet and outlet nozzle 11 through a pagoda clamping sleeve connector 221, and sealing with the air inlet and outlet nozzle 11 can be achieved quickly through the pagoda clamping sleeve connector 221, specifically, a clamping sleeve (denoted by g in the figure) of the pagoda clamping sleeve connector 221 is connected with one end of the second copper pipe 22 away from the stop valve 3, and the other end connector (denoted by h in the figure) is inserted into the air inlet and outlet nozzle 11.

In this embodiment, the heat exchange device 1 at least includes the following two structural forms:

1) The heat exchange device 1 is designed into an air bag, the air bag is connected with the air inlet and outlet nozzle 11, after helium in the liquid helium Dewar volatilizes and enters the air bag, the air bag can rapidly exchange heat with the external environment, so that the temperature of the helium entering the air bag is increased, namely heat is absorbed, after the air bag is fully exchanged, the helium in the air bag can be reinjected into the liquid helium Dewar, the liquid helium in the liquid helium Dewar is volatilized by heat carried by hot helium, the internal pressure of the liquid helium Dewar is increased, after the pressure is increased, the liquid helium in the liquid helium Dewar can be pressed into a transfusion tube and flows into an instrument or an experimental device to be used, the operation is simple, and the air bag can be extruded.

2) The heat exchange device 1 is a hard container, and the air inlet and outlet nozzle 11 can be provided with an air pump, and when the heat exchange of helium entering the heat exchange device 1 is finished, the air pump is started to re-input hot helium of the heat exchange device 1 into the liquid helium Dewar.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. A self-pressurizing device for liquid helium infusion, characterized in that: the liquid helium dewar comprises a heat exchange device (1) and a helium pipeline (2), wherein the heat exchange device (1) is provided with an inner cavity and an air inlet and exhaust nozzle (11) communicated with the inner cavity, one end of the helium pipeline (2) is connected and communicated with an air outlet of the liquid helium dewar, and the other end of the helium pipeline is connected and communicated with the air inlet and exhaust nozzle (11).

2. A self-pressurizing device for liquid helium infusion according to claim 1, wherein: and a stop valve (3) is communicated with the helium pipeline (2).

3. A self-pressurizing device for liquid helium infusion according to claim 2, wherein: helium pipeline (2) include first copper pipe (21) and second copper pipe (22), the intercommunication is equipped with between first copper pipe (21) and second copper pipe (22) stop valve (3), first copper pipe (21) keep away from the one end of stop valve (3) with advance exhaust nozzle (11) and be connected and communicate, second copper pipe (22) keep away from the one end of stop valve (3) with advance exhaust nozzle (11) and be connected and communicate.

4. A self-pressurizing device for liquid helium infusion according to claim 3, wherein: the utility model discloses a liquid helium Dewar, including stop valve (3), first copper pipe (21) are kept away from one end of stop valve (3) is connected with joint Assembly, joint Assembly includes screw KF joint (41) and KF joint (42), the cutting ferrule of KF joint (42) connect in first copper pipe (21) are kept away from one end of stop valve (3), the KF interface of screw KF joint (41) with the KF interface butt joint of KF joint (42), and the junction of the two passes through KF clamp (411) and cramps, the screw joint of screw KF joint (41) is used for the gas vent threaded connection with liquid helium Dewar.

5. A self-pressurizing device for liquid helium infusion according to claim 3, wherein: one end of the second copper pipe (22) far away from the stop valve (3) is connected and communicated with the air inlet and outlet nozzle (11) through a pagoda clamping sleeve joint (221).

6. A self-pressurizing device for liquid helium infusion according to any one of claims 1 to 5 wherein: the heat exchange device (1) is an air bag, and the air bag is connected with the air inlet and outlet nozzle (11).