Liquid nitrogen filling and leakage preventing device for broadband dielectric impedance spectrometer

Abstract

The utility model discloses a kind of liquid nitrogen filling funnel devices for broadband dielectric impedance spectrometer, it is related to generator material technical field.To solve the problem of efficient replenishment of test medium liquid nitrogen in the process of insulating material research and development test for broadband dielectric impedance spectrometer.The utility model includes conical platform type bucket body, backflow metal pipe and fixing ring, liquid nitrogen filling funnel device is connected with the liquid nitrogen storage of broadband dielectric impedance spectrometer by fixing ring, liquid nitrogen filling funnel device is fixed firmly.Liquid nitrogen is filled into the liquid nitrogen storage of broadband dielectric impedance spectrometer by conical platform type bucket body, boiling liquid nitrogen that flows back due to temperature difference in the process of liquid nitrogen injection is drained to the top of conical platform type bucket body by backflow metal pipe, liquid nitrogen temperature reduces no longer boiling in the process of drainage, and along with the filling of liquid nitrogen, it is returned to liquid nitrogen storage again, improve the utilization efficiency of liquid nitrogen, save cost, reduce security risk.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, specifically to the design of a liquid nitrogen funnel device for a broadband dielectric impedance spectrometer. Background Technology

[0002] Wideband dielectric impedance spectroscopy can help identify characteristic signals of insulation aging in large generator insulation materials under thermal, electrical, and mechanical stresses during long-term operation by measuring the dielectric response of materials at different frequencies and temperatures, and assess the degree of insulation aging. For novel insulation materials in large generators, wideband dielectric impedance spectroscopy can study the dielectric properties of materials under different temperature and frequency conditions, providing data support for the selection, optimization, and application of new insulation materials.

[0003] Broadband dielectric impedance spectroscopy uses liquid nitrogen to ensure minimal temperature fluctuations during testing, thus improving accuracy. For this purpose, the broadband dielectric impedance spectroscopy testing system is equipped with a dedicated liquid nitrogen filling and transport system to provide liquid nitrogen for testing. However, the liquid nitrogen tank has a limited capacity and needs to be replenished regularly to continue experiments. Liquid nitrogen production and storage are demanding and costly; research institutions using broadband dielectric impedance spectroscopy typically replenish their liquid nitrogen by purchasing it. Furthermore, broadband dielectric impedance spectroscopy manufacturers do not provide dedicated liquid nitrogen filling systems for their equipment. Therefore, there is currently no standardized procedure for filling the liquid nitrogen tank into the equipment. Utility Model Content

[0004] The purpose of this invention is to solve the problem of the lack of a liquid nitrogen filling device for broadband dielectric impedance spectrometers in the process of testing the performance of insulating materials, and to provide a liquid nitrogen filling funnel device for broadband dielectric impedance spectrometers.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A liquid nitrogen filling funnel device for a broadband dielectric impedance spectrometer includes a truncated cone-shaped funnel body, a reflux metal tube, and a fixing ring. The reflux metal tube is fixed to the inside of the truncated cone-shaped funnel body, with the top end of the reflux metal tube located 5 cm below the top surface of the truncated cone-shaped funnel body. The bottom end of the reflux metal tube extends out of one side of the bottom surface of the truncated cone-shaped funnel body and penetrates 5 cm into the liquid nitrogen tank of the broadband dielectric impedance spectrometer. The fixing ring is fixed to the outside of the truncated cone-shaped funnel body.

[0007] Furthermore, the top diameter of the truncated cone-shaped bucket is 25cm, the bottom diameter is 6cm, the generatrix length from the top to the bottom is 45cm, and the diameter of the counterflow metal pipe is 4cm and the length is 45cm.

[0008] Furthermore, the reflux metal pipe is fixed to the truncated cone-shaped bucket body by multi-point welding or low-temperature fixing.

[0009] Furthermore, the number of fixing rings is four, and the shape is a circular ring or a square ring, which are evenly distributed on the outer side of the truncated cone-shaped bucket body from the top surface to the middle of the generatrix of the bottom surface.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. This utility model provides a liquid nitrogen filling funnel device for a broadband dielectric impedance spectrometer. This device can replenish liquid nitrogen into the liquid nitrogen tank of the broadband dielectric impedance spectrometer. It effectively reduces losses during the liquid nitrogen filling process, ensures the amount of liquid nitrogen added, increases the equipment's testing time, and improves testing efficiency. The device has low production costs and is simple and convenient to operate.

[0012] 2. The present invention provides a liquid nitrogen filling funnel device for a broadband dielectric impedance spectrometer, which fixes the liquid nitrogen filling funnel device to the liquid nitrogen tank of the broadband dielectric impedance spectrometer by four fixing rings and straps, ensuring safety and stability during the liquid nitrogen filling process.

[0013] 3. The present invention provides a liquid nitrogen filling funnel device for a broadband dielectric impedance spectrometer. Through a counterflow metal tube, liquid nitrogen that has been boiling in the liquid nitrogen tank of the broadband dielectric impedance spectrometer due to temperature difference is guided to the liquid nitrogen filling funnel device. As the liquid nitrogen is filled, it returns to the liquid nitrogen tank of the broadband dielectric impedance spectrometer through the liquid nitrogen filling funnel device, which effectively reduces the loss during the liquid nitrogen filling process and improves the efficiency of liquid nitrogen filling. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a top view of the present invention.

[0016] In the diagram: 1. Frustum-shaped bucket; 2. Reverse flow metal pipe; 3. Fixing ring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0018] Combination Figure 1 , Figure 2This embodiment describes a liquid nitrogen funnel device for a broadband dielectric impedance spectrometer, comprising a truncated cone-shaped funnel body 1, a reflux metal tube 2, and a fixing ring 3. The reflux metal tube 2 is fixed to the inside of the truncated cone-shaped funnel body 1, with its top end located 5 cm below the top surface of the truncated cone-shaped funnel body 1. The bottom end of the reflux metal tube 2 extends beyond one side of the bottom surface of the truncated cone-shaped funnel body 1 and penetrates 5 cm into the liquid nitrogen tank of the broadband dielectric impedance spectrometer. The fixing ring 3 is fixed to the outside of the truncated cone-shaped funnel body 1.

[0019] Specifically, the top diameter of the truncated cone-shaped bucket 1 is 25cm, the bottom diameter is 6cm, and the length of the generatrix from the top to the bottom is 45cm. The diameter of the counterflow metal pipe 2 is 4cm and the length is 45cm.

[0020] Specifically, the reflux metal pipe 2 and the truncated cone-shaped bucket 1 are fixed by multi-point welding or low-temperature fixing.

[0021] Specifically, there are four fixing rings 3, which are circular or square in shape and are evenly distributed on the outer side of the truncated cone-shaped bucket 1 from the top surface to the middle of the generatrix of the bottom surface.

[0022] The liquid nitrogen filling funnel device for the broadband dielectric impedance spectrometer of this embodiment first securely fixes the truncated cone-shaped funnel body 1 to the liquid nitrogen storage tank of the broadband dielectric impedance spectrometer using four fixing rings 3. The fixing between the funnel body 1 and the liquid nitrogen storage tank can be made of sturdy and durable materials such as glass cloth tape or hemp rope. Liquid nitrogen is slowly poured into the liquid nitrogen storage tank of the broadband dielectric impedance spectrometer through the truncated cone-shaped funnel body 1. During the liquid nitrogen filling process, the backflow metal tube 2 draws out the boiling liquid nitrogen that has been poured into the liquid nitrogen storage tank of the broadband dielectric impedance spectrometer and lowers its temperature, so that it is refilled into the liquid nitrogen storage tank.

[0023] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A liquid nitrogen filling funnel device for a broadband dielectric impedance spectrometer, characterized in that, The device includes a truncated cone-shaped bucket (1), a reflux metal tube (2), and a fixing ring (3). The reflux metal tube (2) is fixed to the inside of the truncated cone-shaped bucket (1). The top of the reflux metal tube (2) is located 5 cm below the top surface of the truncated cone-shaped bucket (1). The bottom of the reflux metal tube (2) extends out to one side of the bottom surface of the truncated cone-shaped bucket (1) and extends 5 cm into the liquid nitrogen tank of the broadband dielectric impedance spectrometer. The fixing ring (3) is fixed to the outside of the truncated cone-shaped bucket (1).

2. The liquid nitrogen filling funnel device for a broadband dielectric impedance spectrometer according to claim 1, characterized in that, The top diameter of the truncated cone-shaped bucket (1) is 25cm, the bottom diameter is 6cm, and the length of the generatrix from the top to the bottom is 45cm. The diameter of the counterflow metal pipe (2) is 4cm and the length is 45cm.

3. The liquid nitrogen filling funnel device for a broadband dielectric impedance spectrometer according to claim 1, characterized in that, The reflux metal pipe (2) and the truncated cone-shaped bucket (1) are fixed by multi-point welding or low-temperature fixing.

4. The liquid nitrogen filling funnel device for a broadband dielectric impedance spectrometer according to claim 1, characterized in that, The number of fixed rings (3) is 4, and the shape is a circular ring or a square ring. They are evenly distributed on the outer side of the truncated cone-shaped bucket (1) from the top surface to the middle of the generatrix of the bottom surface.

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