High-low temperature heat exchanger suitable for vacuum environment

Abstract

The utility model relates to a high-low temperature heat exchanger suitable for a vacuum environment. The high-low temperature heat exchanger comprises a vacuum flange, a heat exchange sample table and two heat exchange tubes, a heat exchange channel is arranged in the heat exchange sample table, the two heat exchange tubes are both installed on the vacuum flange and both penetrate through the vacuum flange, and the ends, located on the inner side of the vacuum flange, of the two heat exchange tubes are connected with the two ends of the heat exchange channel respectively; the vacuum flange is used for being installed on the side wall of a vacuum cavity in a sealed mode so that the heat exchange sample table can stretch into the vacuum cavity. The heat exchange sample table and the vacuum flange are integrated as a whole to serve as a vacuum accessory, the structure is simple, a refrigeration environment can be provided while a vacuum environment is provided, and in addition, a heating environment can also be provided through the integrated heating rod.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum equipment, and particularly relates to a high and low temperature heat exchanger suitable for a vacuum environment. Background Art

[0002] In the instrumentation industry, when testing different materials, various different test environments need to be created due to material characteristics. For example, vacuum, atmosphere, heating, refrigeration, etc. At present, many material testing instruments generally can only provide a test environment with a single condition. For example, equipment that provides a vacuum environment is difficult to provide a heating or refrigeration environment, and equipment that can provide a vacuum environment while providing a heating and refrigeration environment has defects such as being complex and difficult to repair. Content of the Utility Model

[0003] Based on the above description, the utility model provides a high and low temperature heat exchanger suitable for a vacuum environment. By integrating the heat exchange sample stage and the vacuum flange as a vacuum fitting as a whole, the structure is simple, and a refrigeration environment can be provided while providing a vacuum environment.

[0004] The technical solution of the utility model to solve the above technical problems is as follows: A high and low temperature heat exchanger suitable for a vacuum environment includes a vacuum flange, a heat exchange sample stage, and two heat exchange tubes; a heat exchange channel is arranged in the heat exchange sample stage, both of the two heat exchange tubes are installed on the vacuum flange, and both of the heat exchange tubes penetrate through the vacuum flange. One ends of the two heat exchange tubes located inside the vacuum flange are respectively connected to both ends of the heat exchange channel; the vacuum flange is used for sealingly installing on the side wall of a vacuum cavity, so that the heat exchange sample stage extends into the vacuum cavity.

[0005] On the basis of the above technical solution, the utility model can be further improved as follows.

[0006] Further, a heating rod is arranged in the heat exchange sample stage.

[0007] Further, the heat exchange sample stage further includes a base, a top platform, and heat exchange fins; the base is arranged at the bottom of the heat exchange fins, the top platform is arranged at the top of the heat exchange fins, and a ventilation gap is formed around between the base and the top platform; the heat exchange channel is arranged in the heat exchange fins.

[0008] Further, the heat exchange fins are arranged in a double spiral shape, so that the heat exchange channel extends in a double spiral shape in the heat exchange fins; the end parts of the two heat exchange tubes are respectively connected to both ends of the heat exchange fins.

[0009] Further, the heating rod is inserted into the heat exchange fins along the axis of the heat exchange fins, and the heating rod is connected to the heat exchange fins.

[0010] Furthermore, the heat exchange tube and the heat exchange fin are connected by vacuum brazing.

[0011] Furthermore, a taper joint is provided at one end of the heat exchange tube located outside the vacuum flange.

[0012] Furthermore, the heat exchange sample stage is provided with a thermocouple.

[0013] Furthermore, the heat exchange tube and the vacuum flange are connected by argon arc welding.

[0014] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0015] 1. By integrating the heat exchange sample stage and the vacuum flange as a vacuum fitting as a whole, the present utility model has a simple structure and can provide a refrigerating environment while providing a vacuum environment;

[0016] 2. By integrating a heating rod in the heat exchange sample stage, a heating environment can also be provided while providing a vacuum environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a high and low temperature heat exchanger applicable to a vacuum environment provided by an embodiment of the present utility model;

[0018] Figure 2 is a schematic structural diagram of a heat exchange fin in an embodiment of the present utility model;

[0019] In the drawings, the list of components represented by each reference numeral is as follows:

[0020] 1. Vacuum flange; 2. Heat exchange sample stage; 21. Base; 22. Top platform; 23. Ventilation gap; 24. Heat exchange fin; 25. Heating rod; 26. Thermocouple; 3. Heat exchange tube; 31. Taper joint. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] For ease of understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is thorough and complete.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein in the description of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0023] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising", "including" or "having" and the like specify the presence of the stated features, integers, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts or combinations thereof.

[0024] A high and low temperature heat exchanger applicable to a vacuum environment includes a vacuum flange 1, a heat exchange sample stage 2 and two heat exchange tubes 3. A heat exchange channel is provided in the heat exchange sample stage 2. The two heat exchange tubes 3 are both installed on the vacuum flange 1, and the heat exchange tubes 3 penetrate through the vacuum flange 1. One ends of the two heat exchange tubes 3 located inside the vacuum flange 1 are respectively connected to both ends of the heat exchange channel. The vacuum flange 1 is used for sealingly installing on the side wall of the vacuum cavity, so that the heat exchange sample stage 2 extends into the vacuum cavity.

[0025] In this embodiment, the heat exchange sample stage 2 and the vacuum flange 1 are integrated as a vacuum fitting, which is very convenient for replacement and maintenance. And it has a very high customization.

[0026] In addition, a heating rod 25 and a thermocouple 26 are also integrated in the heat exchange sample stage 2. Under the condition of ensuring overall sealing, the temperature is measured and controlled through the thermocouple 26. A controllable high temperature environment can be created through the heating rod 25, and a controllable low temperature environment can be created by allowing different heat exchange fluids to flow through the heat exchange tubes 3 and the heat exchange channel.

[0027] Preferably, liquid nitrogen refrigeration is adopted and a sheathed heating rod 25 is used for heating, and the temperature range can be accurately controlled at -196°C to 600°C. The overall ultimate vacuum is better than 5.0 * 10-3 Pa.

[0028] In this embodiment, the heat exchange sample stage 2 further includes a base 21, a top platform 22 and heat exchange fins 24. The base 21 is arranged at the bottom of the heat exchange fins 24, the top platform 22 is arranged at the top of the heat exchange fins 24, and ventilation gaps 23 are formed around between the base 21 and the top platform 22. The heat exchange channel is arranged in the heat exchange fins 24, and the heat exchange fins 24 are arranged in a double helix shape, so that the heat exchange channel extends in a double helix shape in the heat exchange fins 24. The end parts of the two heat exchange tubes 3 are respectively connected to both ends of the heat exchange fins 24, so as to connect both ends of the heat exchange channel. The thermocouple 26 is installed at the bottom of the top platform 22. The spiral heat exchange channel has a larger and more uniform contact area with the top platform 22, and can achieve heat exchange between the heat exchange channel and the top platform 22 faster and more stably.

[0029] The heating rod 25 is inserted into the heat exchange fin 24 along the axis of the heat exchange fin 24, and the heating rod 25 is connected to the heat exchange fin 24. Under the heating condition, the heat exchange fin 24 serves to connect the heating rod 25 and the top platform 22, and makes the contact area between the heating rod 25 and the top platform 22 larger and more uniform.

[0030] In addition, the heat exchange sample stage 2 of this embodiment is made of copper with high thermal conductivity, the heat exchange tube 3 is made of stainless steel, and the heat exchange fin 24 and the heat exchange tube 3 are welded by vacuum brazing to ensure the sealing performance. At the same time, the heat exchange tube 3 is connected to the vacuum flange 1 by argon arc welding, and a flare fitting 31 is provided at one end of the heat exchange tube 3 located outside the vacuum flange 1 to facilitate the connection of the fluid pipeline.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high and low temperature heat exchanger suitable for a vacuum environment, characterized in that: It includes a vacuum flange, a heat exchange sample table and two heat exchange tubes; a heat exchange channel is arranged in the heat exchange sample table, the two heat exchange tubes are installed on the vacuum flange, and the heat exchange tubes pass through the vacuum flange, and one end of the two heat exchange tubes located on the inner side of the vacuum flange is respectively connected to the two ends of the heat exchange channel; the vacuum flange is used to be sealed and installed on the side wall of the vacuum cavity, so that the heat exchange sample table extends into the vacuum cavity.

2. The high and low temperature heat exchanger suitable for a vacuum environment according to claim 1, characterized in that: A heating rod is arranged in the heat exchange sample platform.

3. The high and low temperature heat exchanger suitable for a vacuum environment according to claim 2, characterized in that: The heat exchange sample stand also includes a base, a top platform, and a heat exchange plate; the base is arranged at the bottom of the heat exchange plate, the top platform is arranged at the top of the heat exchange plate, and a ventilation gap is formed around the base and the top platform; the heat exchange channel is arranged in the heat exchange plate.

4. The high and low temperature heat exchanger suitable for a vacuum environment according to claim 3, characterized in that: The heat exchange fin is arranged in a double helix shape, so that the heat exchange channel extends in the heat exchange fin in a double helix shape; the ends of the two heat exchange tubes are respectively connected to the two ends of the heat exchange fin.

5. The high and low temperature heat exchanger suitable for vacuum environment according to claim 4, characterized in that: The heating rod is inserted into the heat exchange fin along the axis of the heat exchange fin, and the heating rod is connected to the heat exchange fin.

6. The high and low temperature heat exchanger suitable for vacuum environment according to claim 4, characterized in that: The heat exchange tube is connected to the heat exchange plate by vacuum brazing.

7. The high and low temperature heat exchanger suitable for a vacuum environment according to claim 1, characterized in that: A pagoda joint is provided at one end of the heat exchange tube located outside the vacuum flange.

8. The high and low temperature heat exchanger suitable for a vacuum environment according to claim 1, characterized in that: The heat exchange sample stage is provided with a thermocouple.

9. The high and low temperature heat exchanger suitable for a vacuum environment according to claim 1, characterized in that: The heat exchange tube is connected to the vacuum flange by argon arc welding.

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