Freezing and thawing circulating device for CT scanning

Abstract

The invention discloses a freeze-thaw circulating device for CT scanning, and relates to the technical field of electronic computed tomography, the freeze-thaw circulating device comprises a base, an organic glass barrel and a temperature control system which are hermetically connected in sequence from bottom to top, the base is provided with a water inlet and outlet hole, and the water inlet and outlet hole is communicated with the interior of the organic glass barrel; the organic glass barrel is filled with a sample; the temperature control system is used for controlling the temperature in the glass barrel. According to the freeze-thaw cycle device for CT scanning, temperature control over a sample can be achieved, the freeze-thaw cycle process can be simulated, CT scanning can be conducted in the freeze-thaw cycle process, so that internal structure information of the sample under different temperature conditions is obtained, and a basis is provided for material performance analysis and optimization design. The device is compact in structure, simple and convenient to operate and easy to maintain and upgrade.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic computed tomography, and particularly to a freeze-thaw cycle device for CT scanning. Background Art

[0002] With the continuous progress of science and technology, electronic computed tomography (CT) technology has been widely applied in many fields such as materials science and geological exploration. CT technology utilizes the principle that X-rays attenuate differently when passing through substances with different densities. By rotating the sample 360° and recording the X-ray absorption rate in each direction, the internal structure information of the sample can be reconstructed. This non-destructive testing technology has the advantages of high resolution and non-destructiveness, providing strong support for scientific research and industrial production.

[0003] However, traditional CT devices have certain limitations in terms of functions and application scopes. Especially when it comes to the performance research of materials under extreme temperature conditions, traditional CT devices often cannot meet the requirements. For example, in the field of materials science, to study the structural changes, phase transition processes, and mechanical properties of materials in low-temperature or high-temperature environments, precise temperature control of the sample is required. Therefore, it is particularly important to develop a device that can simultaneously achieve freeze-thaw cycles and CT scanning of the sample.

[0004] To meet these requirements, the present invention proposes a freeze-thaw device for CT scanning. This device combines CT scanning technology and temperature control technology, and can scan and analyze the sample under different temperature conditions. By adding a temperature control device at the top and opening temperature test holes in the plexiglass barrel, precise control and monitoring of the sample temperature can be achieved.

[0005] The research and development and application of the CT freeze-thaw device have important scientific significance and practical value. This device not only expands the application scope of CT technology, but also provides a more comprehensive and precise detection means for scientific research and industrial production. Summary of the Invention

[0006] The purpose of the present invention is to solve the defects existing in the prior art, and to propose a freeze-thaw cycle device for CT scanning.

[0007] To achieve the above purpose, the present invention adopts the following technical solution:

[0008] A freeze-thaw cycle device for CT scanning, comprising a base, a plexiglass barrel, and a temperature control system that are hermetically connected in sequence from bottom to top. The base is provided with water inlet and outlet holes, and the water inlet and outlet holes are communicated with the inside of the plexiglass barrel; the plexiglass barrel is filled with a sample; the temperature control system is used to control the temperature inside the glass barrel.

[0009] Further, the base includes a mounting plate, a support column, and a support platform that are integrally formed from bottom to top. The water inlet and outlet holes are provided on the support column. An opening communicating with the water inlet and outlet holes is formed on the support platform. The water inlet and outlet holes are connected to a replenishing Mariotte bottle.

[0010] Further, a cavity is provided inside the support platform, and a first temperature controller is provided on the outer wall of the cavity. The first temperature controller is connected to a low-temperature box.

[0011] Further, a first connecting bolt is provided on the mounting plate, and the first connecting bolt is used to connect an organic glass barrel.

[0012] Further, connecting flanges are provided at both the top and bottom of the organic glass barrel. Second connecting screw holes are formed on the connecting flanges. A temperature test hole is provided at the top of the organic glass barrel.

[0013] Further, the temperature control system includes a connecting plate, a temperature sensor, and a second temperature controller. The second temperature controller is provided above the organic glass barrel. The temperature sensor extends into the temperature test hole. Third connecting screw holes are formed on the connecting plate. The connecting plate is connected to the second connecting screw holes through the third connecting screw holes.

[0014] Advantageous Effects

[0015] Compared with the prior art, the advantageous effects of the present invention are as follows:

[0016] A freeze-thaw cycle device for CT scanning provided by the present invention can achieve temperature control of a sample, simulate the freeze-thaw cycle process, and perform CT scanning during the freeze-thaw cycle process to obtain internal structure information of the sample under different temperature conditions, providing a basis for material property analysis and optimization design. The device has a compact structure, is easy to operate, and is easy to maintain and upgrade. In addition, the device has multiple program control modes such as sine, rectangular, triangular wave, and linear mixing, and can meet the needs of different scientific research projects. Researchers can flexibly set the mode and time of temperature change according to experimental requirements, so as to achieve precise control of the freeze-thaw process of the sample. Description of the Drawings

[0017] The drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0018] Figure 1 It is a schematic diagram of the overall structure of the invention in the present invention;

[0019] Figure 2 It is a schematic diagram of the base structure in the present invention;

[0020] Figure 3 Schematic diagram of the structure of the plexiglass barrel in the present invention;

[0021] Figure 4 Side view of the temperature control system in the present invention;

[0022] Figure 5 Side upper top view of the temperature control system in the present invention;

[0023] Figure 6 Is the scanning timing synchronization control flow chart.

[0024] In the figure: 1, base; 2, plexiglass barrel; 3, temperature control system; 4, sample; 1-1, first connection screw hole; 1-2, first connection bolt; 1-3, water inlet and outlet hole; 1-4, first temperature controller; 2-2 second connection screw hole; 2-3, temperature test hole; 3-1, second temperature controller; 3-2, temperature sensor; 3-3, third connection screw hole. Specific implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0027] Refer to Figures 1 - 6 , A freeze-thaw cycle device for CT scanning, including a base 1, a plexiglass barrel 2 and a temperature control system 3 that are hermetically connected in sequence from bottom to top. A water inlet and outlet hole 1-3 is opened on the base 1, and the water inlet and outlet hole 1-3 is communicated with the inside of the plexiglass barrel 2; the plexiglass barrel 2 is filled with a sample; the temperature control system 3 is used to control the temperature inside the glass barrel.

[0028] Sample device (the whole device): Set on the sample table of the CT scanning host, used to carry the sample 4 to be scanned. The sample device is a customized design to adapt to the temperature changes during the freeze-thaw cycle.

[0029] Temperature control system 3: It includes a top temperature controller and a temperature test hole 2-3. The top temperature controller is used to adjust the temperature inside the sample device to meet the requirements of freeze-thaw cycles. The temperature test hole 2-3 is used to install a temperature sensor 3-2 to monitor the temperature change inside the sample device in real time.

[0030] Water replenishing system (water inlet and outlet holes 1-3 on the base 1): It includes a water replenishing device and a water replenishing pipeline. The water replenishing device is used to replenish water or other liquids into the sample device to simulate the moisture change of the sample during freeze-thaw cycles. The water replenishing pipeline connects the water replenishing device and the sample device to achieve the transportation of liquids.

[0031] The sample device (the whole device) is set on the sample stage of the CT scanning host and is used to carry the sample to be scanned. The sample device is a customized design, and its material and structure need to adapt to the temperature change during freeze-thaw cycles.

[0032] In other preferred embodiments, the base 1 includes a mounting plate, a support column, and a support platform integrally formed from bottom to top. The water inlet and outlet holes 1-3 are provided on the support column. An opening communicating with the water inlet and outlet holes 1-3 is provided on the support platform. The water inlet and outlet holes 1-3 are connected to a water replenishing Mariotte bottle. The water replenishing Mariotte bottle is used to store the liquid to be replenished. The water replenishing system includes a water replenishing device and a water replenishing pipeline. The water replenishing device is used to store the liquid to be replenished and is connected to the water inlet and outlet holes 1-3 of the base 1 through the water replenishing pipeline.

[0033] Specifically, the support platform is provided with first connection screw holes 1-1 around it for connecting the plexiglass barrel; a cavity is provided inside it, and a first temperature controller 1-4 is provided on the outer wall of the cavity. The first temperature controller 1-4 is connected to a low-temperature box. The low-temperature box is used to provide refrigerant to create a freeze-thaw environment for the device. Its refrigerating capacity @20°C: ≥5000W, the maximum flow rate of the circulation pump: ≥25L / min, and the refrigerating capacity is 5000W.

[0034] Specifically, the mounting plate is provided with first connection bolts 1-2, and the first connection bolts 1-2 are used to connect the plexiglass barrel 2.

[0035] In other preferred embodiments, connection flanges are provided at both the top and bottom of the plexiglass barrel 2, and second connection screw holes 2-2 are provided on the connection flanges. A temperature test hole 2-3 is provided at the top of the plexiglass barrel 2.

[0036] It is used to monitor the temperature change inside the plexiglass barrel 2 in real time and transmit the signal to the control system. The temperature control system 3 can achieve a gradient temperature in the range of -40°C to +60°C, with a temperature fluctuation of 0.1°C and a temperature uniformity of 0.5°C.

[0037] Specifically, the temperature control system includes a connection plate, a temperature sensor 3-2, and a second temperature controller 3-1. The second temperature controller 3-1 is arranged above the plexiglass barrel. The temperature sensor 3-2 extends into the temperature test hole 2-3. The connection plate is provided with a third connection screw hole 3-3, and the connection plate is connected to the second connection screw hole through the third connection screw hole 3-3.

[0038] The second temperature controller 3-1 is also connected to the low-temperature box. The low-temperature box is used to provide refrigerant to provide a freeze-thaw environment for the device. Its refrigerating capacity @20°C: ≥5000W, the maximum flow rate of the circulation pump: ≥25L / min, and the refrigerating capacity is 5000W.

[0039] The usage method of the present invention is as follows:

[0040] Set the required temperature curve and humidity conditions through the temperature control system 3, and start the temperature control system for preheating and humidity adjustment.

[0041] When the specimen reaches the preset initial temperature, open the water supply valve of the water supply system, and supply water into the specimen through the water inlet. At the same time, the exhaust hole discharges excess air and moisture.

[0042] After the water supply is completed, close the water supply valve and the exhaust hole. Set the parameters of the freeze-thaw cycle experiment through the control system, such as temperature range, temperature fluctuation degree, temperature uniformity, humidity range, and number of cycles, etc.

[0043] Start the control system to start the freeze-thaw cycle experiment. During the experiment, the temperature control system monitors and adjusts the temperature and humidity conditions inside the specimen in real time to ensure the accuracy of the experimental parameters. At the same time, the control system records the key data during the experiment for subsequent analysis.

[0044] When the freeze-thaw cycle experiment is completed, turn off the temperature control system and the control system. Open the door lock and remove the temperature sensor (make sure there is no sensor installed in the temperature test hole to avoid metal interference).

[0045] Use the CT scan host to scan the specimen. After the scan is completed, save the scan results to the specified folder through the data export function.

[0046] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A freeze-thaw cycle device for CT scanning, characterized in that: It includes a base, an organic glass barrel and a temperature control system which are sealed and connected in sequence from bottom to top. The base is provided with water inlet and outlet holes which are connected to the inside of the organic glass barrel. The organic glass barrel is filled with samples. The temperature control system is used to control the temperature inside the glass barrel.

2. A freeze-thaw cycle device for CT scanning according to claim 1, characterized in that: The base includes a mounting plate, a support column and a support platform integrally formed from bottom to top, the water inlet and outlet holes are arranged on the support column, and the support platform is provided with openings connected to the water inlet and outlet holes, and the water inlet and outlet holes are connected to the water replenishment Martensitic flask.

3. A freeze-thaw cycle device for CT scanning according to claim 2, characterized in that: A cavity is arranged inside the supporting platform, a first temperature controller is arranged on the outer wall of the cavity, and the first temperature controller is connected to the low temperature box.

4. A freeze-thaw cycle device for CT scanning according to claim 2, characterized in that: The mounting plate is provided with a first connecting bolt, and the first connecting bolt is used for connecting the organic glass barrel.

5. A freeze-thaw cycle device for CT scanning according to claim 1, characterized in that: The top and bottom of the organic glass barrel are both provided with connecting flanges, the connecting flanges are provided with second connecting screw holes, and the top of the organic glass barrel is provided with a temperature testing hole.

6. A freeze-thaw cycle device for CT scanning according to claim 5, characterized in that: The temperature control system includes a connecting plate, a temperature sensor and a second temperature controller, wherein the second temperature controller is arranged above the organic glass barrel; the temperature sensor extends into the temperature testing hole, and a third connecting screw hole is opened on the connecting plate, and the connecting plate is connected to the second connecting screw hole through the third connecting screw hole.

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