Dewar flask

Abstract

The Dewar flask comprises a shell, an inner container, a neck tube assembly and a connector integration assembly, the inner container is contained in the shell, a containing cavity is formed in the inner container, and a through hole communicated with the containing cavity is formed in the top of the inner container; the neck tube assembly comprises a neck tube, and the neck tube vertically penetrates through the shell to the through hole so as to be communicated with the containing cavity; the connector integration assembly comprises a plurality of integrated guide pipes, and the integrated guide pipes are inserted into the neck pipe and communicated with the containing cavity. The multiple integrated guide pipes have multiple functions and have the advantage of being convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of Dewar equipment, in particular to a Dewar flask. BACKGROUND

[0002] At present, in order to ensure the vacuum insulation performance of the Dewar, only one small-diameter pipe is arranged in the existing Dewar to connect the inner container inside the shell, and at present, only the small-diameter pipe can be used to obtain the related capacity information of the Dewar inner container or perform related operations, and only one function can be realized at a time, and the conversion joint needs to be frequently replaced to obtain related information or perform related operations, which seriously affects the use efficiency.

[0003] Therefore, it is urgent to develop a Dewar flask to facilitate use. CONTENT OF THE UTILITY MODEL

[0004] The present application mainly provides a Dewar flask, which has the advantages of facilitating use.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is to provide a Dewar flask, which comprises a shell, an inner container, a neck pipe assembly and an interface integrated assembly, wherein the inner container is accommodated in the shell, a containing cavity is arranged in the inner container, and a through hole communicating with the containing cavity is formed in the top of the inner container; the neck pipe assembly comprises a neck pipe, the neck pipe vertically penetrates the shell to the through hole to communicate with the containing cavity; the interface integrated assembly comprises a plurality of guide pipes integrated together, the plurality of guide pipes integrated together are inserted into the neck pipe and communicate with the containing cavity.

[0006] Among them, the interface integrated assembly comprises a transfusion assembly, a liquid level meter assembly and a transfer injection assembly; the transfusion guide pipe in the transfusion assembly, the liquid level guide pipe in the liquid level meter assembly and the transfer injection guide pipe in the transfer injection assembly are integrated together and inserted into the neck pipe and communicate with the containing cavity.

[0007] Among them, the transfusion assembly further comprises a transfusion interface connected with the transfusion guide pipe; the liquid level meter assembly further comprises a liquid level meter interface connected with the liquid level guide pipe; the transfer injection assembly further comprises a transfer injection interface connected with the transfer injection guide pipe.

[0008] Among them, the interface integrated assembly further comprises a plurality of integrated fixing pieces, which are sequentially arranged along the direction in which the guide pipes extend, and each integrated fixing piece is configured to integrate and fix the plurality of guide pipes together; the integrated fixing piece comprises a copper screen.

[0009] Among them, the interface integrated assembly further comprises an insulating piece, which is arranged between any two adjacent integrated fixing pieces, abuts against the neck pipe and wraps the plurality of guide pipes; the insulating piece comprises a polystyrene block.

[0010] The copper screen surface is wrapped with heat insulation material, and the heat insulation material comprises an aluminized film.

[0011] The interface integrated assembly further comprises a flange blind plate, the infusion interface, the liquid level meter interface and the transfer injection interface are located on the upper side of the flange blind plate, and the infusion guide pipe, the liquid level guide pipe and the transfer injection guide pipe are located on the lower side of the flange blind plate.

[0012] The infusion interface, the liquid level meter interface and the transfer injection interface are welded and fixed on the upper side of the flange blind plate, and the infusion guide pipe, the liquid level guide pipe and the transfer injection guide pipe are bonded to the lower side of the flange blind plate through ultra-low temperature glue.

[0013] The inner diameter of the neck pipe is φ76-φ80mm, and the neck pipe assembly further comprises a plurality of reflection screens which are arranged at intervals and wrap the neck pipe.

[0014] The inner diameter of the infusion guide pipe is φ34.2-φ36.2mm, the inner diameter of the liquid level guide pipe is φ12.5-φ14.5mm, and the inner diameter of the transfer injection guide pipe is φ12.5-φ14.5mm.

[0015] The beneficial effects of the present application are that: in the dewar bottle, the interface integrated assembly comprises a plurality of integrated guide pipes, the plurality of integrated guide pipes are inserted into the neck pipe and communicate with the accommodation cavity, and different guide pipes can be used to realize different functions, which has the advantages of convenient use and improves the operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0017] Figure 1 It is a cross-sectional structure schematic diagram of an embodiment of the dewar bottle in the present application;

[0018] Figure 2 It is a structure schematic diagram of an embodiment of the dewar bottle in the present application; Figure 1

[0019] Figure 3 It is a cross-sectional structure schematic diagram of an embodiment of the interface integrated assembly in the dewar bottle; Figure 1

[0020] Figure 4 It is a cross-sectional structure schematic diagram of an embodiment of the interface integrated assembly in the dewar bottle; Figure 3 ​​Structure diagram of one embodiment of the interface integrated assembly in the Dewar flask;

[0021] Figure 5 For Figure 1 Structure diagram of one embodiment of the inner container and neck tube assembly in the Dewar flask;

[0022] Figure 6 For Figure 1 Structure diagram of one embodiment of the interface assembly in the Dewar flask.

[0023] The reference signs are as follows: 100, Dewar flask; 10, outer shell; 20, inner container; 21, accommodating cavity; 30, neck tube assembly; 31, neck tube; 32, reflecting screen; 40, interface integrated assembly; 41, infusion assembly; 411, infusion interface; 412, infusion guide tube; 42, liquid level meter assembly; 421, liquid level meter interface; 422, liquid level guide tube; 43, transfer assembly; 431, transfer interface; 432, transfer guide tube; 44, guide tube; 45, integrated fixing member; 46, heat insulation member; 47, flange blind plate; 50, interface assembly; 51, heater interface; 52, exhaust interface; 53, thermometer interface; 54, pressure gauge interface; 55, vacuum extraction interface; 56, safety relief interface; 57, primary safety valve interface. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Unless otherwise defined, all the technical and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms “comprise” and “have” and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover the inclusions without exclusivity.

[0026] In the description of the embodiments of the present application, the technical terms “first”, “second”, etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of “plurality” is two or more, unless otherwise explicitly and specifically limited.

[0027] Reference to an "embodiment" in this document means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments.

[0028] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0029] Please refer to Figure 1 , Figure 2 and Figure 3 , the present application provides a dewar flask 100, which comprises an outer shell 10, an inner container 20, a neck pipe assembly 30 and an interface integrated assembly 40, wherein the dewar flask 100 is a vacuum heat insulation container for storing low-temperature liquid (such as liquid nitrogen, liquid helium, etc.). The inner container 20 is accommodated in the outer shell 10, and the inner container 20 is provided with an accommodation cavity 21, and the top of the inner container 20 is provided with a through hole (not shown in the figure) communicating with the accommodation cavity 21; the neck pipe assembly 30 comprises a neck pipe 31, the neck pipe 31 vertically penetrates the outer shell 10 to the through hole to communicate with the accommodation cavity 21; the interface integrated assembly 40 comprises a plurality of integrated guide tubes 44, the plurality of integrated guide tubes 44 are inserted in the neck pipe 31 and communicate with the accommodation cavity 21.

[0030] Specifically, the outer shell 10 plays a role of protecting the internal structure, the inner container 20 is arranged in the outer shell 10, and the inner container 20 is used for storing low-temperature materials, such as liquid nitrogen. The storage material in the inner container 20 is located in the accommodation cavity 21, and the top of the inner container 20 is provided with a through hole for communication with the accommodation cavity 21, and the neck pipe 31 in the neck pipe assembly 30 vertically penetrates the outer shell 10 to communicate with the accommodation cavity 21. The neck pipe 31 is further provided with a plurality of integrated guide tubes 44 in the interface integrated assembly 40, at this time, the plurality of integrated guide tubes 44 and the accommodation cavity 21 are communicated, which is convenient for inputting or transferring the storage material in the accommodation cavity 21, and also can obtain relevant information in the accommodation cavity 21. At this time, different guide tubes 44 can be used to realize different functions, which has the advantage of convenient use, well solves the problem of frequent use of conversion joint replacement, and effectively improves the operation efficiency.

[0031] Please refer to Figure 3and Figure 4 The interface integrated assembly 40 comprises a transfusion assembly 41, a liquid level meter assembly 42 and a transfer injection assembly 43; a transfusion guide tube 412 in the transfusion assembly 41, a liquid level guide tube 422 in the liquid level meter assembly 42 and a transfer injection guide tube 432 in the transfer injection assembly 43 are integrated together and inserted into the neck pipe 31 and communicated with the accommodating cavity 21. Specifically, the transfusion guide tube 412 is arranged to facilitate the delivery of the medium into the accommodating cavity 21 and the storage of the medium; the liquid level guide tube 422 is designed to facilitate the monitoring of the liquid level and the real-time acquisition of the liquid level information; the transfer injection guide tube 432 is arranged to facilitate the transfer of the medium from one storage container (such as a large liquid nitrogen storage tank) to the dewar flask 100 or the allocation of the medium between different dewar flasks 100. Through the application of the interface integrated assembly 40, the functions of transfusion, transfer injection and liquid level detection can be realized in the dewar flask 100 at the same time, the operation efficiency is improved, and the frequent replacement of different guide tubes 44 is avoided.

[0032] Please continue to refer to Figure 3 and Figure 4 The transfusion assembly 41 further comprises a transfusion interface 411 connected with the transfusion guide tube 412; the liquid level meter assembly 42 further comprises a liquid level meter interface 421 connected with the liquid level guide tube 422; and the transfer injection assembly 43 further comprises a transfer injection interface 431 connected with the transfer injection guide tube 432. Specifically, the transfusion interface 411 inputs the medium into the accommodating cavity 21 of the inner container 20 through the transfusion guide tube 412, and the liquid level meter interface 421 is connected with the liquid level guide tube 422 to facilitate real-time monitoring of the liquid level; in the design that the transfer injection interface 431 is connected with the transfer injection guide tube 432, the transfer injection interface 431 plays a mediating role to facilitate the connection between the storage container or different dewar flasks 100, so that the transferred medium enters the accommodating cavity 21 of the inner container 20 through the transfer injection guide tube 432.

[0033] Please continue to refer to Figure 3 The interface integrated assembly 40 further comprises a plurality of integrated fixing members 45 arranged in sequence along the extension direction of the guide tubes 44, and each integrated fixing member 45 is configured to integrate and fix the plurality of guide tubes 44 together; specifically, the integrated fixing members 45 are arranged at intervals in the extension direction of the guide tubes 44, and at this time the guide tubes 44 all pass through the integrated fixing members 45, and at this time the integrated fixing members 45 play a role of integrating and fixing the guide tubes 44.

[0034] In an embodiment, the integrated fixing member 45 comprises a copper screen. By using the copper screen as the integrated fixing member 45, the guiding tube 44 can be fixed in position, and the copper screen can reduce heat radiation, uniform temperature, and electromagnetic shielding. Specifically, when the low-temperature liquid in the Dewar flask 100 is disturbed by the outside environment during use, the temperature of the liquid may

[0035] Please continue to refer to Figure 3 The interface integrated assembly 40 further comprises a heat insulation member 46 arranged between any two adjacent integrated fixing members 45, abutting the neck pipe 31, and wrapping the plurality of guiding tubes 44. The heat insulation member 46 comprises a polystyrene block. Specifically, the heat insulation member 46 has the functions of heat insulation and buffering fixation. The heat insulation member 46 can fix the position of the copper screen and the position of the guiding tube 44. Meanwhile, polystyrene is an excellent heat insulation material, and has very low thermal conductivity. In the Dewar flask 100, the polystyrene block is mainly used to reduce heat transfer. The purpose of the Dewar flask 100 is to store low-temperature liquid, such as liquid nitrogen and liquid helium. Heat transfer from the outside environment into the Dewar flask 100 can cause the liquid to vaporize, reducing the storage effect. The polystyrene block can effectively prevent heat from entering the Dewar flask 100 through heat conduction. For example, compared with metal and other materials, the thermal conductivity of polystyrene is usually several orders of magnitude lower, which can greatly slow down the speed of heat transfer.

[0036] Please continue to refer to Figure 3 The surface of the copper screen is wrapped with heat insulation material (not shown in the figure), and the heat insulation material comprises an aluminum-plated film. Specifically, the surface of the copper screen is wrapped with about 5 layers of aluminum-plated film. Each copper screen is equivalent to a support point of the guiding tube 44, and plays a role in stable support. It can also prevent the slag of the polystyrene block from falling into the medium. In addition, the segmented combination of the copper screen wrapped with heat insulation material and the polystyrene block can radiate cold energy layer by layer, reducing the heat of the guiding tube 44 in contact with the internal medium.

[0037] Please continue to refer to Figure 3 and Figure 4, the interface integrated assembly 40 further comprises a flange blind plate 47, which blocks the neck pipe assembly 30, the infusion interface 411, the liquid level meter interface 421 and the transfer interface 431 are located on the upper side of the flange blind plate 47; the infusion guide pipe 412, the liquid level guide pipe 422 and the transfer guide pipe 432 are located on the lower side of the flange blind plate 47. Specifically, the neck pipe 31 is blocked by the design of the flange blind plate 47, which ensures the closure of the neck pipe 31. At the same time, the flange blind plate 47 separates the infusion interface 411, the liquid level meter interface 421, the transfer interface 431 and the infusion guide pipe 412, the liquid level guide pipe 422 and the transfer guide pipe 432, and plays the role of connecting the liquid level meter interface 421 and the liquid level guide pipe 422, the transfer interface 431 and the transfer guide pipe 432, and the infusion interface 411 and the infusion guide pipe 412.

[0038] Please continue to refer to Figure 3 and Figure 4 , the infusion interface 411, the liquid level meter interface 421 and the transfer interface 431 are welded and fixed on the upper side of the flange blind plate 47; the infusion guide pipe 412, the liquid level guide pipe 422 and the transfer guide pipe 432 are bonded to the lower side of the flange blind plate 47 by ultra-low temperature glue. Specifically, the welding and gluing method can ensure the connection effect, and at the same time can ensure the minimum diameter of the neck pipe 31, the infusion guide pipe 412, the transfer guide pipe 432 and the liquid level guide pipe 422, avoiding the problem that the pipe diameter is too large, which is easy to cause the evaporation rate to be too high, and the ideal heat insulation effect cannot be achieved.

[0039] Please refer to Figure 5 , the inner diameter of the neck pipe 31 is φ76-φ80mm. In an embodiment, the inner diameter of the neck pipe 31 can be φ76, φ77, φ78, φ79 or φ80mm, and the smaller inner diameter of the neck pipe 31 makes the dewar flask 100 achieve the ideal heat insulation effect.

[0040] Please continue to refer to Figure 5 , the neck pipe assembly 30 further comprises a plurality of reflective screens 32, which are arranged at intervals and wrap the neck pipe 31. Increasing the number of reflective screens 32 and adjusting the interval, and wrapping the heat-resistant material on the outside of the reflective screen 32, can increase the number of wrapping and bandaging of the heat-resistant material. Multiple wrapping and bandaging will make the heat insulation layer fluffy and the gap uniform, so as to achieve the ideal heat insulation effect of the inner container 20.

[0041] In an embodiment, the neck tube 31 is 800-900 mm long. In an embodiment, the neck tube 31 can be 800, 820, 840, 860, 880, 900 mm long. When the neck tube 31 is wrapped, the heat-insulating material forms an umbrella-shaped structure through the reflection screen 32. At this time, a gap is formed between the outer shell 10 and the inner container 20, and the larger the gap, the more cumbersome the dewar 100 is and the higher the cost. The more uniform and fluffy the heat-insulating material is wrapped, the more radiant cold is generated, and the cold is less likely to be transferred to the outer shell 10 through the gap, thereby achieving the desired evaporation rate.

[0042] In an embodiment, the inner diameter of the infusion guide tube 412 is φ34.2-φ36.2 mm. Specifically, the inner diameter of the infusion guide tube 412 can be φ34.2, φ34.6, φ35, φ35.2, φ35.6, φ36, φ36.2 mm.

[0043] In an embodiment, the inner diameter of the liquid level guide tube 422 is φ12.5-φ14.5 mm. Specifically, the inner diameter of the liquid level guide tube 422 can be φ12.5, φ13, φ13.5, φ14, φ14.5 mm.

[0044] In an embodiment, the inner diameter of the transfer guide tube 432 is φ12.5-φ14.5 mm. Specifically, the inner diameter of the transfer guide tube 432 can be φ12.5, φ13, φ13.5, φ14, φ14.5 mm.

[0045] Please refer to Figure 6 The dewar 100 also includes an interface assembly 50 that penetrates the outer shell 10. The interface assembly 50 has a heater interface 51, a gas exhaust interface 52, a thermometer interface 53, a pressure gauge interface 54, a vacuum pump interface 55, a safety relief valve interface 56, and a primary safety valve interface 57. Specifically, the heater interface 51 is used to heat the substance in the dewar 100. For example, when it is necessary to vaporize the low-temperature liquid (such as liquid nitrogen) in the dewar 100 for certain experiments or processes, a heating device can be connected through the heater interface 51. This interface allows external heating elements (such as heating wires, etc.) to be inserted into the dewar 100 at the appropriate position and ensures the sealing of the interface to prevent the low-temperature liquid from leaking and external air from entering.

[0046] The gas exhaust interface 52 is used to exhaust the gas in the dewar 100. When the substance in the dewar 100 (such as the gas generated after the vaporization of the low-temperature liquid) or the external air needs to be exhausted, the gas exhaust interface 52 plays a role. It can control the exhaust of the gas in the bottle and maintain the stability of the pressure in the bottle.

[0047] The thermometer interface 53 is used to install a thermometer to accurately measure the temperature inside the dewar 100. It can ensure that the temperature sensing part of the thermometer can effectively contact the material inside the dewar 100 or be in a position that can accurately reflect the internal temperature. Through this interface, the temperature change inside the dewar 100 can be monitored in real time, which is very important for experiments or storage processes that require strict temperature control.

[0048] The pressure gauge interface 54 is used to connect a pressure gauge to monitor the pressure inside the dewar 100 in real time. Since the pressure inside the dewar 100 may change due to the vaporization of the cryogenic liquid stored therein or other factors (such as the speed of the injected liquid, changes in external temperature, etc.), the pressure gauge can provide timely information on the pressure. This helps to prevent the dewar 100 from being dangerous due to excessive pressure, and can also provide data support for some operations that require specific pressure conditions.

[0049] The vacuum pumping interface 55 is used to connect a vacuum pump to the interlayer of the dewar 100 during the manufacture, repair or maintenance of the dewar 100. By reducing the gas pressure in the interlayer, heat conduction and heat convection can be greatly reduced, improving the thermal insulation performance of the dewar 100.

[0050] The safety relief interface 56 and the primary safety valve interface 57 are both designed to ensure the safety of the dewar 100. When the pressure inside the dewar 100 exceeds the design allowable safety pressure, the safety relief device (such as a safety valve) will open through the safety relief interface 56 to release the gas inside the bottle to a safe area, avoiding serious accidents such as explosion of the dewar 100 due to excessive pressure. The primary safety valve interface 57 is usually connected to the main safety valve to ensure the safety of the dewar 100 during use.

[0051] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A Dewar flask, characterized in that, include: shell; The inner liner is housed within the outer shell, and the inner liner has a receiving cavity. The top of the inner liner has a through hole communicating with the receiving cavity. A neck tube assembly, including a neck tube that extends vertically through the housing to the through-hole to communicate with the receiving cavity; The interface integration component includes multiple integrated guide tubes inserted into the neck tube and communicating with the receiving cavity.

2. The Dewar flask according to claim 1, characterized in that, The interface integration component includes an infusion component, a level gauge component, and a transfer component; The infusion guide tube in the infusion assembly, the level guide tube in the level gauge assembly, and the transfer guide tube in the transfer assembly are integrated together and inserted into the neck tube, communicating with the receiving cavity.

3. The Dewar flask according to claim 2, characterized in that, The infusion assembly also includes an infusion interface connected to the infusion guide tube; The level gauge assembly also includes a level gauge interface, which is connected to the level guide tube; The transfusion assembly also includes a transfusion interface connected to the transfusion guide tube.

4. The Dewar flask according to claim 3, characterized in that, The interface integration component also includes: Multiple integrated fasteners are arranged sequentially along the direction of extension of the guide tube, and each integrated fastener is configured to integrate and fix the multiple guide tubes together; The integrated fastener includes a copper screen.

5. The Dewar flask according to claim 4, characterized in that, The interface integration component also includes: An insulating component is disposed between any two adjacent integrated fixing components, abuts against the neck tube, and wraps around the plurality of guide tubes; The insulation component includes a polystyrene block.

6. The Dewar flask according to claim 4, characterized in that, The surface of the copper screen is covered with a heat-insulating material, which includes an aluminum-plated thin film.

7. The Dewar flask according to claim 6, characterized in that, The interface integration component also includes: A flange blind flange is used to seal the neck tube assembly. The infusion port, the level gauge port, and the transfer port are located on the upper side of the flange blind flange. The infusion guide tube, the level guide tube, and the transfer guide tube are located on the lower side of the flange blind flange.

8. The Dewar flask according to claim 7, characterized in that, The infusion port, the level gauge port, and the transfer port are welded and fixed to the upper side of the flange blind plate; The infusion guide tube, the liquid level guide tube, and the transfer guide tube are bonded to the lower side of the flange blind plate with cryogenic adhesive.

9. The Dewar flask according to claim 1, characterized in that, The inner diameter of the neck tube is φ76-φ80mm; The neck tube assembly also includes: multiple reflective screens, spaced apart, that wrap around the neck tube.

10. The Dewar flask according to claim 2, characterized in that, Also includes: The inner diameter of the infusion guide tube is φ34.2-φ36.2mm; The inner diameter of the liquid level guide tube is φ12.5-φ14.5mm; The inner diameter of the transfer guide tube is φ12.5-φ14.5mm.

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