Heating device for core holder in CT machine
By wrapping the heat ties on the core holder in the CT machine and setting a temperature sensor and a thermostat, the problems of low heating efficiency and large space occupation in the prior art are solved, and efficient and low-cost heating and temperature control are achieved, which is suitable for rotary movement in the CT machine.
Patent Information
- Application Number
- CN202422148895.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-03
Smart Images
Figure CN223040174U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a heating device for a core holder in a CT machine, belonging to the technical field of test equipment. Background Art
[0002] In the process of oil development, indoor core displacement tests are often required to evaluate the oil displacement effect and fluid properties. The CT scanning technology can be used to visually study the core displacement process and conduct physical property (such as sound velocity, resistivity, porosity, permeability, relative permeability, etc.) analysis tests on core specimens. However, for core displacement tests, it is often necessary to simulate real reservoir conditions to make the test results more reliable, which requires the entire core displacement test to be carried out under constant temperature and high temperature conditions. Due to the narrow working space inside the CT machine, the light load of the turntable, and the need for the core holder to make a 360° rotational movement during scanning, traditional oven-like equipment cannot be used to heat and control the temperature of the core holder inside the CT machine. Currently, a circulating liquid heating and temperature control system is mostly set outside the CT machine, and then connected to the core holder inside the CT machine through a circulating liquid pipeline. Although this circulating liquid heating and temperature control method can heat the core holder inside the CT machine, to meet the requirement of not hindering the rotational movement of the core holder inside the CT machine, a very long thin hose needs to be configured, resulting in large heat loss, low heating efficiency, and occupying a large test space. Content of the Utility Model
[0003] Aiming at the above problems existing in the prior art, the purpose of the utility model is to provide a heating device for a core holder in a CT machine with high heating efficiency and small occupied test space.
[0004] To achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0005] A heating device for a core holder in a CT machine includes a heating tape evenly wound around the outer circumference of the cylinder wall of the core holder and a temperature sensor arranged between the outer wall of the cylinder of the core holder and the heating tape. It also includes a temperature controller arranged inside or outside the CT machine. The power bus of the heating tape is electrically connected to the output end of the temperature controller, and the signal output end of the temperature sensor is connected to the signal input end of the temperature controller.
[0006] A preferred solution is that a heat preservation sleeve is arranged outside the heating tape.
[0007] A further preferred solution is that the heat preservation sleeve is made of heat-insulating non-metallic material.
[0008] A preferred solution is that the heating tape is a constant power heating tape.
[0009] A further preferred solution is that the heating tape is a parallel-connected constant power heating tape.
[0010] A preferred solution is that the temperature sensor is a patch type temperature sensor.
[0011] In an implementation, the temperature sensor is connected to the temperature controller through a cable.
[0012] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:
[0013] Since the inventors of this application found through experiments that the heating wires of the heating tape are sparsely distributed and relatively thin, which can meet the X-ray penetrability requirements of CT scans, the present application makes use of this characteristic of the heating tape to ingeniously solve the problems of heating and temperature control of the core holder in the CT machine. It not only does not affect the ray penetrability of CT scans, but also has high heating efficiency, low cost, does not require complex pipeline settings, has a very simple structure, is easy to implement, can also meet the rotation requirements of the core holder in the CT machine, is applicable to various situations such as rock triaxial mechanics, seepage testing, and displacement tests in the CT machine, can provide a stable temperature environment for the core specimen in the CT machine, and has significant practical value. Description of the Drawings
[0014] Figure 1 is a schematic cross-sectional structure diagram of the heating device provided by the present utility model when used for the core holder in the CT machine;
[0015] Figure 2 is a three-dimensional structure diagram of the core holder provided by the embodiment when the heating device of the present utility model is used;
[0016] Figure 3 is removing Figure 2 the structure schematic diagram after removing the temperature controller and the heat preservation sleeve in;
[0017] Figure 4 is removing Figure 3 the structure schematic diagram after removing the heating tape in;
[0018] The reference numerals in the drawings are indicated as follows:
[0019] 1. Core holder; 1-1. Cylinder; 1-2. Specimen cavity; 1-3. Specimen pressure head; 1-4. Sealing end cover; 2. Heating tape; 2-1. Power busbar; 3. Temperature sensor; 3-1. Cable; 4. Temperature controller; 5. Heat preservation sleeve. Detailed Embodiments
[0020] The technical solution of the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. In addition, it should be noted that the terms used in the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. Unless otherwise defined, the technical terms or scientific terms used in the present utility model should have the ordinary meaning understood by those with ordinary skills in the art. The orientation or positional relationship indicated by terms such as "inside", "outside", "upper", "lower", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", etc. are all based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, terms such as "set", "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0021] Embodiment
[0022] Please refer to Figures 1 to 4 As shown, a heating device for a core holder in a CT machine provided by the present utility model includes a heating tape 2 evenly wound around the outer circumference of the cylinder body 1-1 of the core holder 1 and a temperature sensor 3 provided between the outer wall of the cylinder body 1-1 of the core holder 1 and the heating tape 2. It also includes a temperature controller 4 provided inside or outside the CT machine. The power bus 2-1 of the heating tape 2 is electrically connected to the output end of the temperature controller 4, and the signal output end of the temperature sensor 3 is connected to the signal input end of the temperature controller 4.
[0023] The present utility model evenly winds the heating tape 2 around the outer circumference of the cylinder body 1-1 of the core holder 1, and uses the heating tape 2 to heat the cylinder body 1-1 of the core holder 1, so as to indirectly heat the confining pressure liquid or displacement liquid in the cylinder body 1-1 of the core holder 1, realizing the provision of the required temperature environment for the core sample. Since the volume of the temperature controller 4 is very small, it can be directly provided inside the CT machine and rotate together with the core holder 1; it can also be provided outside the CT machine. At this time, it is only necessary to make the power bus 2-1 of the heating tape 2 long enough not to affect the rotation of the core holder 1. However, the extension of the power bus 2-1 will not cause the heat loss and low heating efficiency existing in the extended pipeline in the prior art, and the power bus 2-1 is relatively thin and flexible compared with the medium circulation pipeline, so it will not occupy too much space. Of course, if the temperature controller 4 is provided inside the CT machine, it will have the advantages of simpler structure and smaller occupied volume.
[0024] In addition, the present invention does not impose any special restrictions on the shape and structure of the core holder 1, as long as it can be used in a CT machine, but it should include a cylinder 1-1, a sample cavity 1-2, a sample pressure head 1-3 and a sealing end cover 1-4.
[0025] As a preferred solution, a heat preservation sleeve 5 is provided on the outside of the heating belt 2, and the heat preservation sleeve 5 can be made of a heat-insulating non-metallic material.
[0026] As a preferred solution, the heating tape 2 uses a constant power electric heating tape, because the heating wires of the constant power electric heating tape are sparsely distributed and thin, which will be more conducive to the penetration of CT scanning rays; further preferred is a parallel constant power electric heating tape, so that if some of the heating wires are damaged, it will not have a significant impact on the overall heating.
[0027] As a preferred solution, the temperature sensor 3 is a patch-type temperature sensor, so as to be fixed on the outer wall of the barrel 1-1 of the core holder 1. In addition, in this embodiment, the temperature sensor 3 is connected to the temperature controller 4 via a cable 3-1, and of course a wireless connection can also be used, which is not particularly limited.
[0028] Finally, it is necessary to point out that the above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be covered within the protection scope of the utility model.
Claims
1. A heating device for a core holder in a CT machine, characterized in that: It includes a heating belt evenly wound around the outer wall of the core holder's cylinder and a temperature sensor arranged between the outer wall of the core holder's cylinder and the heating belt, and also includes a temperature controller arranged inside or outside the CT machine, the power bus of the heating belt is electrically connected to the output end of the temperature controller, and the signal output end of the temperature sensor is connected to the signal input end of the temperature controller.
2. The heating device for the core holder in a CT machine according to claim 1, characterized in that: A heat preservation sleeve is arranged on the outside of the heating belt.
3. The heating device for the core holder in a CT machine according to claim 2, characterized in that: The thermal insulation sleeve is made of thermal insulation non-metallic material.
4. The heating device for the core holder in a CT machine according to claim 1, characterized in that: The heating tape is a constant power electric heating tape.
5. The heating device for the core holder in a CT machine according to claim 4, characterized in that: The heating tape is a parallel constant power electric heating tape.
6. The heating device for the core holder in a CT machine according to claim 1, characterized in that: The temperature sensor is a patch type temperature sensor.
7. The heating device for the core holder in a CT machine according to claim 1 or 6, characterized in that: The temperature sensor is connected to the temperature controller via a cable.