A liquid nitrogen transfer line structure

Abstract

The liquid nitrogen transmission pipeline structure designed by the application comprises a stainless steel external pipe, a vacuum bellows, a stainless steel outlet pipe and a liquid nitrogen transmission copper pipe; one end of the vacuum bellows is connected with the stainless steel external pipe, and the other end of the vacuum bellows is connected with the stainless steel outlet pipe; the liquid nitrogen transmission copper pipe comprises a first liquid nitrogen transmission copper pipe and a second liquid nitrogen transmission copper pipe; the first liquid nitrogen transmission copper pipe is arranged in the stainless steel external pipe; the second liquid nitrogen transmission copper pipe is arranged in the vacuum bellows; the two are connected through a brass adapter pipe; the top of the stainless steel external pipe is further provided with a flow regulating needle valve connected with the bottom and the brass adapter pipe, which is used for controlling the size of the internal through hole of the brass adapter pipe, so as to adjust the aperture of the liquid nitrogen transmission copper pipe and realize the stable control of the flow rate; meanwhile, the application also realizes the adjustable outlet position of the liquid nitrogen transmission pipe through the design of the vacuum bellows.

Description

Technical Field

[0001] This utility model belongs to the field of liquid nitrogen transmission technology for probe stations, and specifically relates to a liquid nitrogen transmission pipeline structure. Background Technology

[0002] Currently, my country's instrument manufacturers are mainly concentrated in large research institutes and universities, with relatively small enterprise scale and room for improvement in technological development and market expansion capabilities. In terms of market demand, with the development of fields such as materials science and nanoscience, the demand for probe stations is gradually increasing. This provides new market opportunities for the application of probe stations.

[0003] However, existing liquid nitrogen transfer lines for cryogenic probe stations on the market have poor stability, generally low accuracy, and lack flow rate fine-tuning capabilities. They also suffer from structural instability, affecting the accuracy and stability of temperature control. Therefore, it is necessary to design a liquid nitrogen transfer line that is structurally stable, highly accurate, and equipped with flow rate fine-tuning functionality. Utility Model Content

[0004] To address the issues of poor stability and lack of flow rate fine-tuning in existing liquid nitrogen transfer pipelines for cryogenic probe stations, this application designs a liquid nitrogen transfer pipeline structure that uses a flow regulating needle valve to adjust the orifice diameter of the liquid nitrogen transfer copper tube, thereby achieving stable flow rate control.

[0005] A liquid nitrogen transmission pipeline structure includes a stainless steel outer pipe, a vacuum bellows pipe, a stainless steel outlet pipe, and a liquid nitrogen transmission copper pipe.

[0006] One end of the vacuum bellows is connected to a stainless steel outer tube, and the other end of the vacuum bellows is connected to a stainless steel outlet tube.

[0007] The liquid nitrogen transmission copper pipe includes a first liquid nitrogen transmission copper pipe and a second liquid nitrogen transmission copper pipe.

[0008] The first liquid nitrogen transfer copper pipe is installed inside a stainless steel outer pipe.

[0009] The second liquid nitrogen transmission copper tube is installed inside the vacuum bellows;

[0010] A brass adapter is also provided at the connection between the vacuum bellows and the stainless steel outer tube; the brass adapter is connected to the first liquid nitrogen transmission copper tube and the second liquid nitrogen transmission copper tube respectively.

[0011] Preferably, the top of the stainless steel outer tube is also provided with a flow regulating needle valve, the bottom of which is connected to a brass adapter tube to control the size of the internal through hole of the brass adapter tube, so as to control the flow rate of liquid nitrogen.

[0012] Preferably, the stainless steel outer tube is also provided with a vacuum extraction port.

[0013] The advantages and effects of this application are as follows:

[0014] This application discloses a liquid nitrogen transmission pipeline structure, comprising a stainless steel outer tube, a vacuum bellows, a stainless steel outlet tube, and a liquid nitrogen transmission copper tube. One end of the vacuum bellows is connected to the stainless steel outer tube, and the other end is connected to the stainless steel outlet tube. The liquid nitrogen transmission copper tube includes a first liquid nitrogen transmission copper tube and a second liquid nitrogen transmission copper tube. The first liquid nitrogen transmission copper tube is disposed inside the stainless steel outer tube, and the second liquid nitrogen transmission copper tube is disposed inside the vacuum bellows. The two are connected by a brass adapter tube. A flow regulating needle valve is also provided at the top of the stainless steel outer tube and connected to the bottom of the brass adapter tube. This valve is used to control the size of the internal through-hole of the brass adapter tube, thereby adjusting the orifice diameter of the liquid nitrogen transmission copper tube and achieving stable control of the flow rate. Furthermore, this application also achieves adjustable outlet position of the liquid nitrogen transmission tube by using a vacuum bellows design.

[0015] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0016] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 A structural diagram of a liquid nitrogen transmission pipeline designed for this application;

[0019] Figure 2 A front view of a liquid nitrogen transport pipeline structure designed in this application;

[0020] Figure label:

[0021] 1. Stainless steel outer tube; 2. Vacuum bellows; 3. Stainless steel outlet tube; 4. Flow regulating needle valve; 5. Vacuum extraction port. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0023] It should be understood that the phrase "an embodiment" or "this embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "an embodiment" or "this embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0024] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0025] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0026] In this article, the term "at least one" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, "at least one of A and B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0027] It should also 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.

[0028] Example 1

[0029] Please refer to Figures 1-2 This embodiment mainly introduces the basic design of a liquid nitrogen transmission pipeline structure, including a stainless steel outer pipe 1, a vacuum corrugated pipe 2, a stainless steel outlet pipe 3, and a liquid nitrogen transmission copper pipe.

[0030] One end of the vacuum bellows 2 is connected to the stainless steel outer tube 1, and the other end of the vacuum bellows 2 is connected to the stainless steel outlet tube 3.

[0031] The liquid nitrogen transmission copper pipe includes a first liquid nitrogen transmission copper pipe and a second liquid nitrogen transmission copper pipe.

[0032] The first liquid nitrogen transmission copper pipe is installed inside the stainless steel outer pipe 1.

[0033] The second liquid nitrogen transmission copper pipe is installed inside the vacuum bellows 2;

[0034] A brass adapter is also provided at the connection between the vacuum bellows 2 and the stainless steel outer tube 1; the brass adapter is connected to the first liquid nitrogen transmission copper tube and the second liquid nitrogen transmission copper tube respectively; the brass adapter is located inside the stainless steel outer tube 1.

[0035] Furthermore, a flow regulating needle valve 4 is provided at the top of the stainless steel outer tube 1. The bottom of the flow regulating needle valve 4 is connected to the brass adapter tube and is used to control the size of the internal through hole of the brass adapter tube in order to control the flow rate of liquid nitrogen.

[0036] Furthermore, the stainless steel outer tube 1 is also provided with a vacuum port 5, which is used to perform a vacuuming operation on the sealed space formed by the stainless steel outer tube, the vacuum corrugated tube and the stainless steel outlet tube.

[0037] This application discloses a liquid nitrogen transmission pipeline structure, comprising a stainless steel outer tube, a vacuum bellows, a stainless steel outlet tube, and a liquid nitrogen transmission copper tube. One end of the vacuum bellows is connected to the stainless steel outer tube, and the other end is connected to the stainless steel outlet tube. The liquid nitrogen transmission copper tube includes a first liquid nitrogen transmission copper tube and a second liquid nitrogen transmission copper tube. The first liquid nitrogen transmission copper tube is disposed inside the stainless steel outer tube, and the second liquid nitrogen transmission copper tube is disposed inside the vacuum bellows. The two are connected by a brass adapter tube. A flow regulating needle valve is also provided at the top of the stainless steel outer tube and connected to the bottom of the brass adapter tube. This valve is used to control the size of the internal through-hole of the brass adapter tube, thereby adjusting the orifice diameter of the liquid nitrogen transmission copper tube and achieving stable control of the flow rate. Furthermore, this application also achieves adjustable outlet position of the liquid nitrogen transmission tube by using a vacuum bellows design.

[0038] The above description is merely a preferred embodiment of this utility model and does not limit the scope of protection of this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter alterations made to these embodiments within the spirit and principles of this utility model, through conventional substitutions or methods that achieve the same function without departing from the principles and spirit of this utility model, fall within the scope of protection of this utility model.

Claims

1. A liquid nitrogen transmission pipeline structure, characterized in that, Includes a stainless steel outer tube (1), a vacuum corrugated tube (2), a stainless steel outlet tube (3), and a liquid nitrogen transmission copper tube; One end of the vacuum bellows (2) is connected to the stainless steel outer tube (1), and the other end of the vacuum bellows (2) is connected to the stainless steel outlet tube (3). The liquid nitrogen transmission copper pipe includes a first liquid nitrogen transmission copper pipe and a second liquid nitrogen transmission copper pipe. The first liquid nitrogen transmission copper pipe is installed inside the stainless steel outer pipe (1); The second liquid nitrogen transmission copper pipe is installed inside the vacuum bellows (2); A brass adapter is also provided at the connection between the vacuum bellows (2) and the stainless steel outer tube (1); the brass adapter is connected to the first liquid nitrogen transmission copper tube and the second liquid nitrogen transmission copper tube respectively.

2. The liquid nitrogen transmission pipeline structure according to claim 1, characterized in that, The top of the stainless steel outer tube (1) is also provided with a flow regulating needle valve (4), the bottom of which is connected to a brass adapter tube to control the size of the internal through hole of the brass adapter tube so as to control the flow rate of liquid nitrogen.

3. The liquid nitrogen transmission pipeline structure according to claim 2, characterized in that, The stainless steel outer tube (1) is also provided with a vacuum extraction port (5).

Images