Device for observing abnormal phenomenon of cable insulation layer
By designing a device for abnormal observation of cable insulation layer, using heating and amplification technology, the problems of inefficiency and poor observation effects of traditional methods are solved, and efficient and clear abnormal observation effects of insulating layer are achieved.
Patent Information
- Application Number
- CN202421916772.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-08
AI Technical Summary
The traditional method of observing abnormal phenomena in cable insulation layer is inefficient. The insulating slices are too crystallized at room temperature, with poor transparency and yellow color, which affects the observation effect; some impurities or foreign objects are too small and light in color, making it difficult to see clearly after slice; the insulating bulge may be damaged after being sliced, and it is impossible to determine whether it is caused by pores or pre-crosslinking; the insulating layer additives are unevenly dispersed and light in color, making it difficult to determine whether there is an uneven dispersion problem.
Design a device for observing abnormal phenomena in cable insulation layer, including heating components, sample observation components and sample fixing components. The sample is heated by heating the heating parts to make it transparent at high temperatures. The internal structure of the sample is amplified and illuminated by a convex lens-type observation window and multiple light sources to clearly observe abnormal phenomena.
The cable insulated sample is made transparent by heating with silicone oil. Combined with a convex lens-type observation window and a uniformly distributed light source, the observation efficiency and effect are significantly improved, and the internal impurities, pores and additives can be clearly seen, avoiding the reduction in transparency caused by cooling and cooling during the observation process.
Smart Images
Figure CN222979486U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wire and cable, and relates to an observation and detection device for cables, in particular to a device for observing abnormal phenomena of cable insulation layers. Background Art
[0002] Crosslinked polyethylene is often used in the insulation layer of power cables, and it has very high requirements for cleanliness and dispersibility of additives during the production of power cables. However, after cable stranding, it is often inevitable to produce some abnormal states, such as breakdown during partial discharge tests, bulges on the cable surface, unqualified aging, etc. The possible reasons for these problems include insulation impurities, air holes in the insulation, poor dispersion of insulation additives, etc. This requires sampling the cable and observing and analyzing its insulation layer to determine the specific problems. The traditional observation method is as follows: use a cable slicing machine to slice the cable insulation layer by layer, and then observe the specific state under a magnifying glass. This method is somewhat feasible for larger impurities or impurities with darker colors.
[0003] However, the traditional observation method has the following problems:
[0004] 1) During multiple experiments, the experimenters found that this method requires layer-by-layer slicing and observation each time, resulting in low efficiency.
[0005] 2) The crystallinity of the insulation slice is too high at room temperature, with poor transparency, yellowish color, affecting the observation effect.
[0006] 3) Some foreign matters such as impurities are too small and light in color to be clearly seen after slicing.
[0007] 4) After slicing some insulation bulges, the original state will be damaged, and it is impossible to determine whether it is caused by air holes or pre-crosslinking.
[0008] 5) The amount of additives added to the insulation layer is small and the color is very light, making it completely impossible to determine whether there is uneven dispersion of additives. Summary of the Utility Model
[0009] In order to solve the above problems, the utility model provides a device for observing abnormal phenomena of crosslinked polyethylene cable insulation layers. The utility model mainly consists of three parts: a heating component, a sample observation component, and a sample fixing component. The insulation sample with the outer screen removed is clamped on the sample fixing component, and then the sample is placed into the sample observation component. The silicone oil in the sample observation component is heated by the heating component to heat the insulation sample. The insulation sample becomes transparent at high temperature. By injecting light, the already transparent insulation sample can be illuminated, and then magnified through the convex lens type observation window set on the sample observation component, so that the specific abnormal phenomena in the insulation sample can be clearly seen. The utility model can solve many deficiencies and low efficiency problems of the existing test methods.
[0010] To achieve the above object, the utility model adopts the following technical solutions:
[0011] A device for observing abnormal phenomena of a cable insulation layer, which sequentially includes a heating component, a sample observation component and a sample fixing component from bottom to top. The sample fixing component is detachably connected and fixed to the sample observation component. A sample observation window and a plurality of light sources are provided on the sample observation component. A stirring device is provided on the heating component, and the stirring device passes through the bottom of the sample observation component and is located inside the sample observation component.
[0012] As a preferred solution of the utility model, the sample fixing component includes an oil tank cover, a clamp knob, a connecting rod and a sample clamp. The oil tank cover is matched with the upper part of the sample observation component.
[0013] As a preferred solution of the utility model, a plurality of screws for fixing the sample are provided on the sample clamp.
[0014] As a preferred solution of the utility model, the clamp knob is connected to the sample clamp through the connecting rod, and the connecting rod passes through the center of the oil tank cover.
[0015] As a preferred solution of the utility model, the light sources are evenly distributed on the upper, middle and lower parts of the sample observation component.
[0016] As a preferred solution of the utility model, the sample observation component is provided with an inner cavity for containing silicone oil.
[0017] As a preferred solution of the utility model, the sample observation window is a convex lens.
[0018] As a preferred solution of the utility model, the heating component includes a heating motor, an oil seal, a stirring device and a motor rotating shaft. The stirring device is connected to the heating motor through the motor rotating shaft, and the oil seal is arranged at the connection between the stirring device and the bottom of the sample observation component.
[0019] As a preferred solution of the utility model, a power key and a heating key are further provided on the heating component.
[0020] Compared with the prior art, the utility model has the following beneficial effects:
[0021] 1) The utility model adopts the method of heating with silicone oil, which can make the cable insulation sample transparent, facilitating the observation of internal impurities, pores and the dispersion state of additives.
[0022] 2) The utility model adopts a convex lens type observation window, which can magnify the observed part, enabling the observer to see more clearly.
[0023] 3) The utility model is provided with a heating component, which can make the temperature of silicone oil more evenly dispersed, and the cable insulation sample can be ensured to be evenly heated with consistent transparency.
[0024] 4) The fixture knob of the utility model can rotate the sample, enabling better observation of all directions of the sample; the oil tank cover and the sample fixture can keep the sample immersed in the silicone oil of the sample observation component during observation, eliminating the need to take out the sample for observation, avoiding the reduction of transparency due to cooling during observation, and the light source can provide better brightness for the observation environment. Description of the Drawings
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0026] Figure 1 It is a schematic diagram of the utility model.
[0027] Figure 2 It is a schematic diagram of the sample fixing component of the utility model.
[0028] In the figure, 1. Sample fixing component; 11. Oil tank cover; 12. Fixture knob; 13. Connecting rod; 14. Sample fixture; 15. Screw; 2. Sample observation component; 21. Main body of the sample observation component; 22. Light source; 23. Sample observation window; 3. Heating component; 31. Main body of the heating component; 32. Heating motor; 33. Oil seal; 34. Stirring device; 35. Rotating shaft; 36. Power button; 37. Heating button. Detailed Embodiments
[0029] To further understand the content of the utility model, the utility model will be described in detail in combination with the drawings and embodiments.
[0030] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than limiting the utility model. In addition, it should be noted that for the sake of convenience of description, only the parts related to the utility model are shown in the drawings. The terms "first", "second", etc. described in the present utility model are set for the convenience of describing the technical solution of the present utility model, and have no specific limiting effect, and are all general references, and do not constitute a limiting effect on the technical solution of the present utility model. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 utility model 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 cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradiction or conflict, and are all within the scope of protection required by the present utility model.
[0031] Embodiment 1
[0032] See Figure 1 And Figure 2 , the present utility model provides a device for observing abnormal phenomena of a cable insulating layer. The device sequentially includes a heating component 3, a sample observation component 2, and a sample fixing component 1 from bottom to top.
[0033] The sample fixing component 1 is detachably connected and fixed to the sample observation component 2. The sample observation component 2 is provided with a sample observation window 23 and a plurality of light sources 22. The heating component 3 is provided with a stirring device 34. The stirring device 34 passes through the bottom of the sample observation component 2 and is located inside the sample observation component 2.
[0034] The sample fixing component 1 includes an oil tank cover 11, a fixture knob 12, a connecting rod 13, and a sample fixture 14. The oil tank cover 11 is matched with the upper part of the sample observation component 2.
[0035] The fixture knob 12 is connected to the sample fixture 14 through the connecting rod 13. The connecting rod 13 passes through the exact center of the oil tank cover 11. During use, by rotating the fixture knob 12, the connecting rod 13 and the sample fixture 14 are driven, so that the sample fixed on the sample fixture 14 rotates. A plurality of screws 15 for fixing the sample are provided on the sample fixture 14.
[0036] The light sources 22 are evenly distributed on the upper, middle and lower parts of the sample observation part main body 21 of the sample observation part 2. The light sources 22 can be small lamp beads, which can make the observation environment have better brightness.
[0037] The sample observation part 2 is provided with an inner cavity for containing silicone oil, and the sample observation window 23 is a convex lens.
[0038] The heating part 3 includes a heating part main body 31, a heating motor 32, an oil seal 33, a stirring device 34 and a motor rotating shaft 35. The stirring device 34 is connected to the heating motor 32 through the motor rotating shaft 35. The oil seal 33 is arranged at the connection between the stirring device 34 and the bottom of the sample observation part 2. A power key 36 and a heating key 37 are also provided on the heating part 3.
[0039] During the specific implementation process, the cable insulation sample with the outer screen peeled off and the conductor removed is vertically placed at the central position of the sample fixture 14. The screw 15 is tightened to fix the sample. The fixture knob 12 and the sample fixture 14 are connected through the connecting rod 13, and the connecting rod 13 passes through the exact center of the oil tank cover 11.
[0040] An appropriate amount of silicone oil is added into the sample observation part main body 21. The oil tank cover 11 with the sample clamped is covered above the sample observation part main body 21. At this time, the sample is also immersed in the silicone oil. The sample observation part main body 21 is made of transparent glass material, and there is a sample observation window 23 in the form of a convex lens with a thicker thickness than other places. The sample with the magnified picture can be observed at this place. Six light sources 22 (i.e., small lamp beads) are arranged on both sides around the sample observation part main body 21. The heating part main body 21 is embedded at the bottom of the sample observation part main body 21. There are holes passing through the bottom at the bottom of the sample observation part main body 21. An oil seal 33 is arranged in the holes. The lower part of the motor rotating shaft 35 is a heating motor 32 arranged inside the heating part main body 31. The motor rotating shaft 35 passes through the oil seal 33 and extends into the sample observation part main body 21. A stirring device 34 is arranged at the other end of the motor rotating shaft 35.
[0041] After pressing the power button 36, the entire device is powered on and the light source 22 lights up. After pressing the heating button 37, the heating component 3 starts to heat the main body 21 of the sample observation component. At the same time, the heating motor 32 rotates to drive the stirring device 34 to rotate, so that the silicone oil in the main body 21 of the sample observation component is evenly heated as a whole. The sample is heated by the silicone oil in the main body 21 of the sample observation component at the same time until the sample becomes transparent after rising to a specific temperature. The transparent cable insulation sample can be observed through the convex lens type sample observation window 23. Under the illumination of the light source 22, various internal abnormal phenomena can be clearly seen. At the same time, rotate the fixture knob 12 to rotate the sample, and the abnormal conditions of different parts can be observed through the sample observation window 23.
[0042] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments to this technical solution without creative efforts without departing from the purpose of the present invention, they should fall within the protection scope of the present invention.
Claims
1. A device for observing abnormal phenomena of cable insulation layer, characterized in that: The device comprises, from bottom to top, a heating component, a sample observation component and a sample fixing component, wherein the sample fixing component and the sample observation component are detachably connected and fixed, the sample observation component is provided with a sample observation window and a plurality of light sources, and the heating component is provided with a stirring device, wherein the stirring device passes through the bottom of the sample observation component and is located inside the sample observation component.
2. The device for observing abnormal phenomena of cable insulation layer according to claim 1, characterized in that: The sample fixing component comprises an oil tank cover, a fixture knob, a connecting rod and a sample fixture, and the oil tank cover matches the upper part of the sample observation component.
3. The device for observing abnormal phenomena of cable insulation layer according to claim 2, characterized in that: The sample fixture is provided with a plurality of screws for fixing the sample.
4. The device for observing abnormal phenomena of cable insulation layer according to claim 2, characterized in that: The fixture knob is connected to the sample fixture via a connecting rod, and the connecting rod passes through the center of the oil tank cover.
5. The device for observing abnormal phenomena of cable insulation layer according to claim 1, characterized in that: The light sources are evenly distributed in the upper part, the middle part and the lower part of the sample observation component.
6. The device for observing abnormal phenomena of cable insulation layer according to claim 1, characterized in that: The sample observation component is provided with an inner cavity for containing silicone oil.
7. The device for observing abnormal phenomena of cable insulation layer according to claim 1, characterized in that: The sample observation window is a convex lens.
8. The device for observing abnormal phenomena of cable insulation layer according to claim 1, characterized in that: The heating component includes a heating motor, an oil seal, a stirring device and a motor shaft. The stirring device is connected to the heating motor through the motor shaft. The oil seal is arranged at the connection between the stirring device and the bottom of the sample observation component.
9. A device for observing abnormal phenomena of cable insulation layer according to any one of claims 1 to 8, characterized in that: The heating component is also provided with a power key and a heating key.