Insulating material thermal shrinkage experimental device

Abstract

The utility model relates to the technical field of thermal shrinkage experiment devices, in particular to an insulating material thermal shrinkage experiment device which comprises a control unit and a base, and a placing groove is formed in the upper surface of the base. A baffle is arranged on one side of the base, an electric sliding rail is further arranged on the base, a sliding block is movably arranged on the electric sliding rail, a contact block is fixedly arranged on the sliding block, a first distance sensor is arranged on the side, facing the baffle, of the sliding block, and a contact sensor is arranged on the side, facing the baffle, of the contact block. The electric sliding rail, the first distance sensor and the contact sensor are all electrically connected with the control unit. Aiming at the technical problems of inconvenience in operation and poor precision of the existing technical scheme, the insulating material is placed in the placement groove in the base, the sliding block is automatically driven by the electric sliding rail to enable the contact block to abut against the insulating material, and the length of the insulating material is rapidly and accurately measured by matching with the first distance sensor.

Description

Technical Field

[0001] This utility model relates to the technical field of heat shrinkage test devices, specifically to a heat shrinkage test device for insulating materials. Background Technology

[0002] High-performance polymer materials such as cross-linked polyethylene are often used in the insulation layer of power cables. However, due to the limitations of the cable laying process, the cooled cables often experience varying degrees of thermal shrinkage in the later stages, which has a significant impact on cable quality. This requires insulation material manufacturers to analyze the insulation materials themselves and develop materials with less thermal shrinkage by analyzing the thermal shrinkage phenomenon of materials under different formulations.

[0003] Currently, the industry standard for testing the heat shrinkage of insulating materials generally involves preparing a sample strip, marking it with lines, measuring the initial length with a ruler, and then measuring the distance between the marked lines after placing it under certain conditions. The shrinkage rate is then calculated based on the difference. However, this method relies on manual measurement, which is inconvenient, and the measurement accuracy is limited by the measuring tool (ruler). Especially for some insulating materials such as cross-linked polyethylene, which have relatively small heat shrinkage, existing methods cannot adequately meet the needs of measurement experiments. Utility Model Content

[0004] To address the technical problems of inconvenient operation and poor accuracy of existing technical solutions, this utility model provides a heat shrinkage test device for insulating materials. It uses a placement groove on the base to place the insulating material, and an electric slide rail automatically drives the slider to make the contact block abut against the insulating material. In conjunction with a first distance sensor, the length of the insulating material can be measured quickly and accurately.

[0005] The technical solution provided by this utility model is as follows: a heat shrinkage test device for insulating materials, including a control unit and a base, wherein a placement groove is provided on the upper surface of the base; a baffle is provided on one side of the base, and an electric slide rail is also provided on the base, wherein a slider is movably arranged on the electric slide rail, and a contact block is fixedly arranged on the slider; a first distance sensor is provided on the side of the slider facing the baffle, and a contact sensor is provided on the side of the contact block facing the baffle; the electric slide rail, the first distance sensor, and the contact sensor are all electrically connected to the control unit.

[0006] Optionally, a bracket is fixedly provided on the baffle, and a screw is provided on the bracket. The screw is threadedly engaged with a screw hole on the bracket, and a clamping plate is fixedly provided at one end of the screw facing the placement groove.

[0007] Optionally, a second distance sensor is provided on the side of the contact block opposite to the baffle, and the second distance sensor is electrically connected to the control unit.

[0008] Optionally, a level is fixedly mounted on at least one side of the base.

[0009] Optionally, the electric slide rail is a lead screw.

[0010] Optionally, the slider is provided with a display screen, which is electrically connected to the control unit.

[0011] Optionally, the base is provided with a support foot at the bottom, and the support foot is connected to the base by a leveling screw.

[0012] Optionally, talc powder is provided on the wall of the placement tank.

[0013] Beneficial effects

[0014] Compared with the prior art, the technical solution provided by this utility model has the following advantages: In view of the technical problems of inconvenient operation and poor accuracy of the existing technical solutions, this utility model uses the placement groove on the base to place the insulating material, and the electric slide rail automatically drives the slider to make the contact block abut against the insulating material. In conjunction with the use of the first distance sensor, the length of the insulating material is quickly and accurately measured. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the thermal shrinkage test device for insulating materials proposed in an embodiment of this utility model.

[0016] Figure 2 This is one of the structural schematic diagrams of the slider proposed in the embodiment of this utility model.

[0017] Figure 3 This is the second schematic diagram of the slider structure proposed in this embodiment of the utility model. Detailed Implementation

[0018] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0019] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the utility model. Furthermore, it should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. The terms "first," "second," etc., used in this utility model are provided for the convenience of describing the technical solution of this utility model and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solution of this utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. 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 that do not contradict or conflict, all of which are within the scope of protection claimed by this utility model.

[0020] Combined with appendix Figure 1-3 This embodiment proposes a thermal shrinkage testing device for insulating materials, including a control unit and a base 1. The upper surface of the base 1 has a placement groove 2. A baffle 3 is provided on one side of the base 1. An electric slide rail 4 is also provided on the base 1, with a slider 5 movably mounted on the slide rail 4. A contact block 6 is fixedly mounted on the slider 5. A first distance sensor 71 is provided on the side of the slider 5 facing the baffle 3, and a contact sensor 8 is provided on the side of the contact block 6 facing the baffle 3. The electric slide rail 4, the first distance sensor 71, and the contact sensor 8 are all electrically connected to the control unit. The first distance sensor 71 can be an optical distance sensor, such as a laser rangefinder. The electric slide rail 4 can be a lead screw or other electrically driven track capable of moving the slider 5.

[0021] The working principle of the thermal shrinkage test apparatus for insulating materials in this embodiment is as follows: An appropriate length of insulating material is prepared according to the experimental requirements, ensuring that the ends of the sample are flush. The sample with flush ends is placed in the placement groove 2, ensuring that the end face of the sample is tightly fitted with the baffle 3. Then, the electric slide rail 4 is activated, and the slider 5 moves slowly. When the contact sensor 8 on the contact block 6 abuts against the end of the sample, the electric slide rail 4 stops, the slider 5 stops moving, and the control unit records the position data (i.e., distance) of the first distance sensor 71.

[0022] The sample is then placed in an oven and heated according to the experimental standards. After heating, the sample is placed in placement tank 2 and cooled to room temperature. The end face of the sample is then tightly fitted to baffle 3. The same automatic measurement process as before sample heating is repeated, and the control unit records the position data (i.e., distance) of the first distance sensor 71. By comparing the difference between the two position data, the axial shrinkage length of the sample can be obtained, and thus the shrinkage rate of the sample can be obtained.

[0023] Therefore, in view of the technical problems of inconvenient operation and poor accuracy of existing technical solutions, this utility model uses the placement groove 2 on the base 1 to place the insulating material, and the electric slide rail 4 automatically drives the slider 5 to make the contact block 6 abut against the insulating material. In conjunction with the use of the first distance sensor 71, the length of the insulating material is quickly and accurately measured.

[0024] To improve human-computer interaction efficiency, a display screen 13 can be installed on slider 5, and the display screen 13 is electrically connected to the control unit. Thus, the display screen 13 can display the measurement values ​​read each time, or directly output the final results such as the shrinkage rate of the sample through program calculation by the control unit.

[0025] In a further embodiment, a bracket 9 is fixedly mounted on the baffle 3, and a screw 10 is mounted on the bracket 9. The screw 10 is threadedly engaged with a screw hole on the bracket 9, and a clamping plate 11 is fixedly mounted on the end of the screw 10 facing the placement groove 2. Thus, the height of the clamping plate 11 can be adjusted by the threaded engagement between the screw 10 and the bracket 9, thereby achieving the clamping and fixing of the sample. Based on this configuration, the sample can be transported together with the insulation material heat shrinkage testing device of this embodiment, ensuring that the sample will not fall out of the placement groove 2 during transport.

[0026] For example, the sample and experimental apparatus can be placed in the oven simultaneously to reduce interference caused by separate sample transport. However, it should be noted that the clamping plate 11 clamps the sample only during transport and is solely for the relative fixation between the sample and the experimental apparatus. During the aforementioned measurement experiments, the clamping plate 11 should be loosened, and no clamping force should be applied to the sample. Furthermore, to prevent damage to the sample from the clamping plate 11, a flexible pad can be placed on the side of the clamping plate 11 facing the placement groove 2 to prevent direct contact between the clamping plate 11 and the sample.

[0027] In another embodiment, a second distance sensor 72 is provided on the side of the contact block 6 away from the baffle 3, and the second distance sensor 72 is electrically connected to the control unit. In this embodiment, the second distance sensor 72 can measure the distance between the slider 5 and the end of the base 1 away from the baffle 3. This distance measurement can serve as an error compensation function, that is, it can be compared with the direct measurement of the sample length in the aforementioned principle, thereby making the measured sample length more accurate. It is conceivable that the second distance sensor 72, like the first distance sensor 71, can be an optical distance sensor.

[0028] Furthermore, a level 12 can be installed on the base 1. The level 12 can be an electronic level 12 or a common bubble level 12, thereby helping the operator to observe whether the experimental apparatus is placed horizontally. The level 12 can be fixed on both sides of the base 1, thereby further ensuring that the experimental apparatus can be placed horizontally.

[0029] In addition, a support leg 14 can be provided at the bottom of the base 1. The support leg 14 is connected to the base 1 by a leveling screw. Generally, the support leg 14 and the leveling screw can be fixedly connected, and the leveling screw is threadedly connected to the base 1. When it is found that the experimental device is not level, the support leg 14 and the leveling screw in this embodiment can be further adjusted by rotating the support leg 14 to adjust the relative distance between the support leg 14 and the base 1, thereby achieving the leveling of the experimental device.

[0030] Based on the aforementioned principle, after the sample is heated, it will be placed in the placement tank 2 to cool to room temperature. However, the heated sample may stick to the inner wall of the placement tank 2. Therefore, in the preferred embodiment, talcum powder can be applied to the tank wall of the placement tank 2 to avoid sticking.

[0031] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited to this. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An apparatus for thermal shrinkage test of an insulating material, characterized by comprising: The system includes a control unit and a base (1). The upper surface of the base (1) is provided with a placement groove (2). A baffle (3) is provided on one side of the base (1). An electric slide rail (4) is also provided on the base (1). A slider (5) is movably arranged on the electric slide rail (4). A contact block (6) is fixedly arranged on the slider (5). A first distance sensor (71) is provided on the side of the slider (5) facing the baffle (3). A contact sensor (8) is provided on the side of the contact block (6) facing the baffle (3). The electric slide rail (4), the first distance sensor (71), and the contact sensor (8) are all electrically connected to the control unit.

2. The apparatus of claim 1, wherein the apparatus is configured to heat the insulation material to a temperature of about 150 °C to about 200 °C. A bracket (9) is fixedly installed on the baffle (3), and a screw (10) is installed on the bracket (9). The screw (10) is threadedly engaged with the screw hole on the bracket (9), and a clamping plate (11) is fixedly installed on one end of the screw (10) facing the placement groove (2).

3. The apparatus of claim 1, wherein the insulation material is a heat shrinkable insulation material. A second distance sensor (72) is provided on the side of the contact block (6) away from the baffle (3), and the second distance sensor (72) is electrically connected to the control unit.

4. The apparatus of claim 1, wherein the insulation material is a heat shrinkable insulation material. A level (12) is fixedly installed on at least one side of the base (1).

5. The apparatus of claim 1, wherein the insulation material is a heat shrinkable insulation material. The electric slide rail (4) is a lead screw.

6. The apparatus of claim 1, wherein the insulation material is a heat shrinkable insulation material. The slider (5) is provided with a display screen (13), which is electrically connected to the control unit.

7. The apparatus according to claim 1 or 4, wherein The base (1) is provided with a support leg (14) at its bottom, and the support leg (14) is connected to the base (1) by a leveling screw.

8. The apparatus of claim 1, wherein the insulation material is a heat shrinkable insulation material. The wall of the placement trough (2) is provided with talc powder.

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