Detection device for thermal expansion test of spherical graphite

Abstract

The utility model discloses a spherical graphite thermal expansion test detection device which comprises a box-type resistance furnace, a heat preservation shell is fixedly arranged on the box-type resistance furnace, and spherical graphite thermal expansion test detection mechanisms are fixedly arranged on the outer wall of the upper side where the top of the heat preservation shell is located and the four outer walls of the outer side of the heat preservation shell. And the five internal cover bodies can stably fix the spherical graphite from different directions, so that the spherical graphite is effectively prevented from displacing or shaking in a heating expansion process. A plurality of spherical graphite thermal expansion test detection mechanisms are distributed at different positions and can comprehensively and accurately measure the size change of spherical graphite in the thermal expansion process from multiple directions.

Description

Technical Field

[0001] The utility model relates to a thermal expansion test detection device, in particular to a spherical graphite thermal expansion test detection device. Background Art

[0002] Accurately measuring the thermal expansion of materials is a fundamental and critical task in materials science and engineering. Thermal expansion refers to the change in volume or size of a material when its temperature changes. For materials with important industrial applications, such as spherical graphite, understanding their thermal expansion behavior is crucial to ensuring their reliability in various engineering applications. However, traditional measurement methods can suffer from unstable fixation, inaccurate measurements, and unreliable data.

[0003] When traditional detection devices fix spherical graphite, the fixing method usually used is not stable enough and cannot effectively fix the graphite from multiple directions. As a result, the graphite is easily displaced or shaken during the thermal expansion process, which greatly affects the accuracy of the measurement results and generates a large number of measurement errors due to changes in the position of the graphite.

[0004] Therefore, there is an urgent need for a better spherical graphite thermal expansion test device on the market. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the defects of the above-mentioned technology and provide a spherical graphite thermal expansion test device.

[0006] To solve the above technical problems, the technical solution provided by the present invention is a spherical graphite thermal expansion test device: comprising a box-type resistance furnace, on which a heat-insulating shell is fixedly provided, and spherical graphite thermal expansion test detection mechanisms are fixedly provided on the upper outer wall where the top of the heat-insulating shell is located and on the four outer walls outside the heat-insulating shell;

[0007] The spherical graphite thermal expansion test mechanism includes a sliding hollow tube body, the sliding hollow tube body penetrates the outer wall of the heat-insulating shell and is fixedly connected to the outer wall of the heat-insulating shell, the inner wall of the sliding hollow tube body is provided with an annular damping pad, the sliding tube body is slidably provided inside the annular damping pad, the inner end of the sliding tube body is fixedly provided with a blind hole shell, the blind hole shell is located inside the heat-insulating shell, the opening direction of the blind hole shell is away from the sliding tube body, and the opening of the blind hole shell is provided with an internal cover body;

[0008] A measuring ruler is fixedly provided at the outer end of the sliding tube body, and an auxiliary frame is fixedly provided at the outer end of the sliding hollow tube body; a digital display detection component is fixedly provided at the end of the auxiliary frame, and the measuring ruler passes through the digital display detection component, which serves to read the measuring ruler body.

[0009] As an improvement, a temperature sensor is installed in the blind hole housing.

[0010] As an improvement, the box-type resistance furnace is provided with a lower bracket, the end of the lower bracket is fixedly provided with an external controller, the external controller and the temperature sensor are electrically connected, and the external controller and the digital display detection component are electrically connected.

[0011] As an improvement, a door body is provided on the outside of the heat-insulating shell, and one side of the door body is hinged to the heat-insulating shell; a spherical graphite thermal expansion test mechanism is located on the door body;

[0012] A handle is fixedly provided on the door body.

[0013] As an improvement, the opening of the blind hole shell and the internal cover are fixedly connected by means of a threaded connection.

[0014] As an improvement, support legs are fixedly provided at the four corners of the lower side of the box-type resistance furnace.

[0015] As an improvement, the material of the annular damping pad is a high temperature resistant annular damping pad.

[0016] As an improvement, the extending direction of the measuring ruler body is the same as the extending direction of the sliding tube body.

[0017] As an improvement, the measuring ruler is made of stainless steel.

[0018] The advantages of this new device over existing technologies include excellent securing: the five internal covers securely hold the spherical graphite from different directions, effectively preventing displacement or shaking during thermal expansion. This robust securing method significantly ensures measurement accuracy and reduces measurement errors caused by graphite position shifts.

[0019] Multi-directional, precise measurement: Multiple spherical graphite thermal expansion testers are located in different locations, enabling comprehensive and precise measurement of spherical graphite dimensional changes during thermal expansion from multiple directions. This multi-directional measurement significantly improves measurement accuracy and reliability, providing rich, accurate data for in-depth analysis of graphite's thermal expansion characteristics.

[0020] High Measurement Accuracy: The stainless steel measuring scale and digital display components offer excellent stability and precision. This enables precise measurement of the thermal expansion displacement of graphite samples during heating, enabling accurate calculation of the thermal expansion coefficient, providing critical data for material performance evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a three-dimensional schematic diagram of a spherical graphite thermal expansion test device of the utility model. Figure 1 .

[0022] Figure 2 This is a three-dimensional schematic diagram of a spherical graphite thermal expansion test device of the utility model. Figure 2 .

[0023] Figure 3 The utility model is a side view structural schematic diagram of a spherical graphite thermal expansion test detection device.

[0024] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle.

[0025] Figure 5 yes Figure 4 Schematic diagram of the locally enlarged structure at point A in the middle. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the utility model is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0028] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0029] In the description of the embodiments of the present invention, “a plurality of” means at least 2.

[0030] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. 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 internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] In conjunction with the accompanying drawings, a spherical graphite thermal expansion test device includes a box-type resistance furnace 1, a heat-insulating shell 2 is fixedly provided on the box-type resistance furnace 1, and a spherical graphite thermal expansion test detection mechanism 3 is fixedly provided on the upper outer wall where the top of the heat-insulating shell 2 is located and the four outer walls outside the heat-insulating shell 2;

[0032] The spherical graphite thermal expansion test mechanism 3 includes a sliding hollow tube body 4, which passes through the outer wall of the heat-insulating shell 2 and is fixedly connected to the outer wall of the heat-insulating shell 2. The inner wall of the sliding hollow tube body 4 is provided with an annular damping pad 5, and a sliding tube body 6 is slidably provided in the annular damping pad 5. The inner end of the sliding tube body 6 is fixedly provided with a blind hole shell 7, and the blind hole shell 7 is located inside the heat-insulating shell 2. The opening direction of the blind hole shell 7 is away from the sliding tube body 6. The opening of the blind hole shell 7 is provided with an internal cover body 8, and the opening of the blind hole shell 7 and the internal cover body 8 are fixedly connected by a threaded connection; a temperature sensor 9 is installed in the blind hole shell 7;

[0033] The sliding tube 6 is made of a heat-resistant alloy, such as 310 stainless steel.

[0034] A measuring ruler 10 is fixedly provided at the outer end of the sliding tube body 6, and an auxiliary frame 11 is fixedly provided at the outer end of the sliding hollow tube body 4. The material of the measuring ruler 10 is metal stainless steel; the extension direction of the measuring ruler 10 is the same as the extension direction of the sliding tube body 6; a digital display detection component 12 is fixedly provided at the end of the auxiliary frame 11, and the measuring ruler 10 passes through the digital display detection component 12, which serves to read the measuring ruler 10.

[0035] The box-type resistance furnace 1 is provided with a lower bracket 13 , and an external controller 14 is fixedly provided at the end of the lower bracket 13 . The external controller 14 is electrically connected to the temperature sensor 9 , and the external controller 14 is electrically connected to the digital display detection component 12 .

[0036] A door 15 is provided outside the heat-insulating shell 2, and one side of the door 15 is hinged to the heat-insulating shell 2. One of the spherical graphite thermal expansion test mechanisms 3 is located in the door 15. A handle 16 is fixed to the door 15.

[0037] Support legs 17 are fixedly provided at the four corners of the lower side of the box-type resistance furnace 1 .

[0038] The material of the annular damping pad 5 is a high temperature resistant annular damping pad.

[0039] When the device is in use, the door 15 is opened, and the spherical graphite that needs to be tested for thermal expansion is placed in the inner insulation shell 2, and the spherical graphite that needs to be tested for thermal expansion is located on the box-type resistance furnace 1, and the box-type resistance furnace 1 heats the spherical graphite that needs to be tested for thermal expansion.

[0040] Close the door 15; then let the outer sides of the internal covers 8 on the five spherical graphite thermal expansion test mechanisms 3 press against the spherical graphite that needs to be tested for thermal expansion. The outer sides of the spherical graphite that needs to be tested for thermal expansion are pressed against by four internal covers 8, and the upper side of the spherical graphite that needs to be tested for thermal expansion is pressed against by one internal cover 8.

[0041] The box-type resistance furnace 1 heats the spherical graphite to be tested for thermal expansion.

[0042] The thermally expanded spherical graphite pushes the sliding tube 6 on the spherical graphite thermal expansion test mechanism 3 to slide, thereby allowing the measuring scale 10 to move on the digital display detection component 12, and the digital display detection component 12 plays a role in reading the measuring scale 10.

[0043] The external controller 14 and the digital display detection component 12 are electrically connected to facilitate knowing the change in size, thereby obtaining relevant data of the spherical graphite thermal expansion test.

[0044] The external controller 14 is electrically connected to the temperature sensor 9 to monitor the temperature.

[0045] Detailed narrative structure:

[0046] The bottom of the device is a box-type resistance furnace 1, and a heat-insulating shell 2 is firmly fixed above the box-type resistance furnace 1.

[0047] The structure of the heat-insulating shell 2 is relatively complex, and spherical graphite thermal expansion testing mechanisms 3 are installed at five locations on the top and four outer walls.

[0048] The core component of each spherical graphite thermal expansion test mechanism 3 is a sliding hollow tube 4, which penetrates the outer wall of the insulation shell 2 and is tightly fixed thereto. An annular damping pad 5 is provided inside the sliding hollow tube 4. This high-temperature-resistant annular damping pad 5 can reduce impact and vibration during sliding. Inside the annular damping pad 5, a sliding tube 6 is slidably arranged. A blind hole shell 7 is fixed to the inner end of the sliding tube 6. The blind hole shell 7 is located inside the insulation shell 2, with its opening facing away from the sliding tube 6. An internal cover 8 is installed at the opening of the blind hole shell 7 via a threaded connection. A temperature sensor 9 is also provided inside the blind hole shell 7. A measuring scale 10 is fixed to the outer end of the sliding tube 6. The measuring scale 10 is made of stainless steel and has good stability and corrosion resistance. The outer end of the sliding hollow tube 4 is fixed with an auxiliary frame 11 , and the end of the auxiliary frame 11 is fixed with a digital detection component 12 . The measuring ruler 10 passes through the digital detection component 12 , and the digital detection component 12 can accurately read the displacement data of the measuring ruler 10 .

[0049] The box-type resistance furnace 1 is also provided with a lower bracket 13, and an external controller 14 is fixed to the end of the lower bracket 13. The external controller 14 is electrically connected to the temperature sensor 9 and the digital display detection component 12 to monitor and process the temperature and displacement data.

[0050] The outer side of the heat-insulating shell 2 is provided with a door body 15, one side of the door body 15 is connected to the heat-insulating shell 2 by a hinged manner, and is convenient to open and close. A handle 16 is fixedly installed on the door body 15 for easy operation.

[0051] Support legs 17 are fixedly provided at the four corners on the lower side of the box-type resistance furnace 1 to ensure the stable placement of the entire device.

[0052] Detailed description of usage:

[0053] First, hold the handle 16 to open the door 15. Inside the opened insulation shell 2, carefully and accurately place the spherical graphite that needs to be tested for thermal expansion in the center of the heating area of ​​the box-type resistance furnace 1 to ensure that the graphite can be evenly heated.

[0054] Next, close door 15. At this point, the five spherical graphite thermal expansion test mechanisms 3 distributed within the insulation housing 2 come into play. Four internal covers 8 press tightly against the outside of the spherical graphite from different directions, while the third internal cover 8 precisely presses against the top of the spherical graphite. This arrangement firmly secures the spherical graphite, keeping it stable during the subsequent heating process and providing a basis for accurate expansion measurement.

[0055] Then, start the power supply of the box-type resistance furnace 1 and start heating the spherical graphite. In the initial stage of heating, pay close attention to the working state of the box-type resistance furnace 1 to ensure that it operates normally and the heating power and temperature rise rate meet expectations.

[0056] As the box-type resistance furnace 1 continues to heat, the spherical graphite gradually expands. This expansion forces the sliding tube 6 to slide outward within the sliding hollow tube 4. Because the sliding tube 6 and the measuring scale 10 are fixedly connected, the sliding of the sliding tube 6 causes the measuring scale 10 to move on the digital display detection component 12.

[0057] During the entire heating process, the digital display detection component 12 will display the displacement change of the measuring ruler 10 in real time. This change data directly reflects the dimensional change of the spherical graphite after thermal expansion.

[0058] At the same time, the external controller 14 continuously monitors the reading of the digital display detection component 12 and the temperature data detected by the temperature sensor 9 through electrical connection. The external controller 14 records and analyzes these data to obtain detailed and accurate relevant data on the spherical graphite thermal expansion test.

[0059] Describe the advantages in detail:

[0060] Excellent Fixing: Five internal caps 8 securely hold the spherical graphite from different directions, effectively preventing it from shifting or shaking during thermal expansion. This secure fixation significantly ensures measurement accuracy and reduces measurement errors caused by graphite position shifts.

[0061] Multi-directional, precise measurement: Multiple spherical graphite thermal expansion testers (3) are located in different locations, enabling comprehensive and precise measurement of spherical graphite dimensional changes during thermal expansion from multiple directions. This multi-directional measurement significantly improves measurement accuracy and reliability, providing rich, accurate data for in-depth analysis of graphite's thermal expansion characteristics.

[0062] High Measurement Accuracy: The stainless steel measuring scale 10 and digital display detection component 12 offer excellent stability and precision. This enables precise measurement of the thermal expansion displacement of graphite samples during heating, enabling accurate calculation of the thermal expansion coefficient, providing critical data for material performance evaluation.

[0063] Accurate temperature monitoring: The built-in temperature sensor 9 can accurately monitor the temperature changes of the graphite sample in real time. This not only ensures that the heating process is carried out according to the predetermined temperature curve, improving the accuracy of the heating process, but also ensures that the heating conditions are highly repeatable in each test, helping to draw reliable test conclusions.

[0064] Convenient data processing: The electrical connection between the external controller 14, the digital display detection component 12, and the temperature sensor 9 enables intelligent automatic data recording and analysis. This greatly reduces the workload of manual data recording and processing, improves work efficiency, and reduces the impact of human error on the data, making the data more accurate and reliable.

[0065] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A spherical graphite thermal expansion test device, characterized in that: The invention comprises a box-type resistance furnace (1), wherein a heat-insulating shell (2) is fixedly provided on the box-type resistance furnace (1), and a spherical graphite thermal expansion test mechanism (3) is fixedly provided on the upper outer wall where the top of the heat-insulating shell (2) is located and on the four outer walls outside the heat-insulating shell (2); The spherical graphite thermal expansion test mechanism (3) comprises a sliding hollow tube (4), the sliding hollow tube (4) penetrates the outer wall of the heat-insulating shell (2) and is fixedly connected to the outer wall of the heat-insulating shell (2), the inner wall of the sliding hollow tube (4) is provided with an annular damping pad (5), a sliding tube (6) is slidably provided inside the annular damping pad (5), a blind hole shell (7) is fixedly provided at the inner end of the sliding tube (6), the blind hole shell (7) is located inside the heat-insulating shell (2), the opening direction of the blind hole shell (7) is away from the sliding tube (6), and the opening of the blind hole shell (7) is provided with an internal cover (8); A measuring ruler (10) is fixedly provided at the outer end of the sliding tube (6), and an auxiliary frame (11) is fixedly provided at the outer end of the sliding hollow tube (4); a digital display detection component (12) is fixedly provided at the end of the auxiliary frame (11), and the measuring ruler (10) passes through the digital display detection component (12), and the digital display detection component (12) plays a role in reading the measuring ruler (10).

2. A spherical graphite thermal expansion test device according to claim 1, characterized in that: A temperature sensor (9) is installed in the blind hole housing (7).

3. A spherical graphite thermal expansion test device according to claim 2, characterized in that: The box-type resistance furnace (1) is provided with a lower bracket (13), an external controller (14) is fixedly provided at the end of the lower bracket (13), the external controller (14) is electrically connected to the temperature sensor (9), and the external controller (14) is electrically connected to the digital display detection component (12).

4. A spherical graphite thermal expansion test device according to claim 3, characterized in that: A door body (15) is provided on the outside of the heat-insulating shell (2), and one side of the door body (15) and the heat-insulating shell (2) are hingedly connected; a spherical graphite thermal expansion test mechanism (3) is located in the door body (15); A handle (16) is fixedly provided on the door body (15).

5. The spherical graphite thermal expansion test device according to claim 1, characterized in that: The opening of the blind hole housing (7) and the internal cover (8) are fixedly connected by means of a threaded connection.

6. A spherical graphite thermal expansion test device according to claim 5, characterized in that: Support legs (17) are fixedly provided at the four corners of the lower side of the box-type resistance furnace (1).

7. A spherical graphite thermal expansion test device according to claim 6, characterized in that: The material of the annular damping pad (5) is a high-temperature resistant annular damping pad.

8. A spherical graphite thermal expansion test device according to claim 7, characterized in that: The extending direction of the measuring ruler (10) is the same as the extending direction of the sliding tube (6).

9. A spherical graphite thermal expansion test device according to claim 8, characterized in that: The material of the measuring ruler body (10) is stainless steel.

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