linear thermal expansion coefficient measuring instrument

Abstract

This utility model relates to the field of measuring equipment technology, specifically a linear thermal expansion coefficient measuring instrument. It includes: a main body; a detection rod disposed on the main body and connected to a displacement sensor; and a heating furnace movably disposed on the main body via an adjustment assembly. The heating furnace includes a heating chamber and a baffle; the heating chamber is used to accommodate the sample, and the baffle is fixedly disposed at the inner end of the heating chamber; both ends of the sample abut against the detection rod and the baffle, respectively. The adjustment assembly includes: a sliding shaft fixedly connected to the main body via an end plate; and a base plate slidably disposed on the sliding shaft via a sliding seat. It enables adjustment of the position and height of the heating furnace, ensuring effective transmission and accurate acquisition of the sample expansion displacement, balancing testing accuracy and operational convenience.

Description

Technical Field

[0001] This utility model relates to the field of measuring equipment technology, specifically to a linear thermal expansion coefficient measuring instrument. Background Technology

[0002] The linear coefficient of thermal expansion (CCO) is one of the important thermophysical parameters of materials. This parameter characterizes the dimensional changes of a material with temperature during heating, and is crucial for assessing its thermal stability, structural design, and reliability prediction. Therefore, developing a high-precision and easy-to-operate CCO measuring device has always been a key research focus in the field of materials testing technology.

[0003] Traditional linear thermal expansion coefficient measuring instruments typically include a heating furnace, a sample clamping mechanism, and a displacement detection system. The heating furnace is used to uniformly heat the sample. One end of the sample is fixed to a reference baffle, and the other end is in contact with a detection rod that transmits displacement. The displacement sensor measures the thermal elongation of the sample, and the thermal expansion coefficient is calculated by combining the temperature data.

[0004] However, existing measuring instruments still have the following shortcomings in practical use: (1) The heating furnace is in a fixed position, making it difficult to achieve precise coaxial alignment between the heating chamber and the sample and the testing rod. When loading or unloading the sample, the movement of the heating furnace often causes the sample to shift under force, affecting the repeatability of the measurement.

[0005] (2) When testing samples of different lengths, it is not possible to quickly switch between samples of different specifications, which restricts the improvement of testing efficiency. Utility Model Content

[0006] To address the technical problems existing in the background art, this utility model provides a linear thermal expansion coefficient measuring instrument, which can realize the adjustment of the position and height of the heating furnace, ensuring the effective transmission and accurate acquisition of the sample expansion displacement, and taking into account both testing accuracy and ease of operation.

[0007] The technical solution adopted by this utility model to solve its technical problem is: A linear thermal expansion coefficient measuring instrument, including: main body; The detection rod is mounted on the main body and is connected to a displacement sensor; The heating furnace is movably mounted on the main body via adjustable components; The heating furnace includes a heating chamber and a baffle. The heating chamber is used to hold the sample, and the baffle is fixedly installed at the inner end of the heating chamber. The two ends of the sample abut against the testing rod and the baffle, respectively.

[0008] Furthermore, the adjustment components include: The sliding shaft is fixedly connected to the main body via an end plate; The substrate is slidably mounted on the slide shaft via a sliding seat.

[0009] Furthermore, the substrate is threadedly connected to a support column, and the heating furnace is supported on the upper end of the support column.

[0010] Furthermore, a second nut is threaded to the lower end of the support column, and the second nut abuts against the base plate.

[0011] Furthermore, a connecting column is provided at the lower end of the heating furnace, and the connecting column passes through the substrate.

[0012] Furthermore, the lower end of the connecting post is threaded with a first nut, which abuts against the base plate.

[0013] Furthermore, the base plate is threaded with a positioning bolt, the lower end of which presses against the slide shaft.

[0014] Furthermore, the detection rod has a hole for accommodating the sample, and an axially sliding push rod is provided at the inner end of the hole, which is connected to the displacement sensor.

[0015] Furthermore, a vertical plate is fixedly connected to the main body, a displacement sensor is fixedly mounted on the vertical plate, and the detection rod is coaxially arranged with the heating chamber.

[0016] The beneficial effects of this utility model are: (1) The adjustment component uses a sliding shaft and a sliding seat to make the heating furnace move smoothly along the sliding shaft, which facilitates the quick adjustment of the relative position of the heating chamber and the detection rod, and is suitable for samples of different lengths.

[0017] (2) The height and position of the heating furnace can be finely adjusted and fixed by the support column and the connecting column, ensuring that the two ends of the sample are coaxial with the detection rod and the heating chamber respectively, ensuring the effective transmission and accurate acquisition of the sample expansion displacement, and taking into account both the test accuracy and the convenience of operation.

[0018] (3) An axially sliding top rod is installed inside the detection rod to indirectly transmit the sample expansion to the displacement sensor, thus avoiding direct contact between the displacement sensor and the high-temperature sample. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ; Figure 3 This is a partial cross-sectional view of the detection rod; Figure 4This is a partial sectional view of the heating furnace; Figure 5 This is a schematic diagram of the adjustment component.

[0021] In the picture: 1. Main body, 2. Adjustment assembly, 3. Heating furnace, 4. Sample, 5. Detection rod, 6. Vertical plate, 7. Displacement sensor; 21. End plate; 22. Sliding shaft; 23. First nut; 24. Second nut; 25. Support column; 26. Sliding seat; 27. Positioning bolt; 28. Base plate; 31. Heating chamber; 32. Baffle; 33. Connecting column; 51. Top rod. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 , 2 As shown, the linear thermal expansion coefficient measuring instrument includes a main body 1. A detection rod 5 is mounted on the main body 1 and connected to a displacement sensor 7. A heating furnace 3 is movably mounted on the main body 1 via an adjustment assembly 2.

[0024] like Figure 4 As shown, the heating furnace 3 includes a heating chamber 31 and a baffle 32. The heating chamber 31 is used to accommodate the sample 4 and heat it. The baffle 32 is fixedly disposed at the inner end of the heating chamber 31. During testing, both ends of the sample 4 abut against the detection rod 5 and the baffle 32, respectively. In a specific embodiment, a vertical plate 6 is fixedly connected to the upper end of the main body 1, and a displacement sensor 7 is fixedly disposed on the vertical plate 6, thereby ensuring that the detection rod 5 and the heating chamber 31 are coaxially arranged.

[0025] like Figure 5 As shown, the specific structure of the adjustment component 2 includes a sliding shaft 22, the two ends of which are fixedly connected to the main body 1 via end plates 21. The base plate 28 is slidably mounted on the sliding shaft 22 via a sliding seat 26. The adjustment component 2 uses the sliding shaft 22 and the sliding seat 26 to cooperate, so that the heating furnace 3 can move smoothly along the sliding shaft 22, which facilitates the rapid adjustment of the relative position of the heating chamber 31 and the detection rod 5, and adapts to samples 4 of different lengths.

[0026] The base plate 28 is threadedly connected to four support pillars 25. The upper end of each support pillar 25 has a circular protrusion, and the heating furnace 3 is supported on the upper end of the support pillars 25. The support pillars 25 serve to support and fix the heating furnace 3. By turning the support pillars 25, the height and position of the heating furnace 3 can be adjusted. The lower end of each support pillar 25 is threadedly connected to a second nut 24, which abuts against the base plate 28. This allows the position of the support pillars 25 to be locked.

[0027] A connecting column 33 is fixedly installed at the lower end of the heating furnace 3. The connecting column 33 passes through a corresponding through hole on the substrate 28, and the diameter of the through hole is larger than the diameter of the connecting column 33. A first nut 23 is threadedly connected to the lower end of the connecting column 33. The first nut 23 abuts against the substrate 28, thereby locking the position of the connecting column 33. The connecting column 33 serves to tighten and fix the heating furnace 3. Combined with the support column 25 for supporting and fixing the heating furnace 3, the fixing of the heating furnace 3 is more secure. Through the support column 25 and the connecting column 33, the height and position of the heating furnace 3 can be finely adjusted and fixed, ensuring that both ends of the sample 4 are coaxial with the detection rod 5 and the heating chamber 31, respectively. This ensures the effective transmission and accurate acquisition of the expansion displacement of the sample 4, balancing testing accuracy and operational convenience.

[0028] The substrate 28 is threadedly connected to a positioning bolt 27, the lower end of which presses against the slide shaft 22. The positioning bolt 27 serves to fix the position of the substrate 28 and prevent the substrate 28 from moving on the slide shaft 22.

[0029] like Figure 3 As shown, the detection rod 5 has a hole for accommodating the sample 4, and an axially sliding push rod 51 is provided at the inner end of the hole. The push rod 51 is connected to the displacement sensor 7. The sample 4 is inserted into the hole and abuts against the push rod 51. The axially sliding push rod 51 provided in the detection rod 5 can indirectly transmit the expansion of the sample 4 to the displacement sensor 7, avoiding direct contact between the displacement sensor 7 and the high-temperature sample.

[0030] Specific usage instructions: S1. Measure and record the initial length of sample 4 at room temperature.

[0031] S2. Install the sample 4 onto the detection rod 5, push the heating furnace 3 to allow the sample 4 to enter the heating chamber 31 until it is in close contact with the baffle 32. Then, fix the heating furnace 3.

[0032] S3. Start the heating furnace 3 to heat it up and maintain it at the preset temperature.

[0033] S4. The displacement change of sample 4 during the process of rising from the initial temperature to the set temperature is monitored and recorded in real time by displacement sensor 7.

[0034] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A linear thermal expansion coefficient measuring instrument, characterized in that, include: Main body (1); The detection rod (5) is set on the main body (1) and is connected to the displacement sensor (7). The heating furnace (3) is movably mounted on the main body (1) via the adjusting component (2); The heating furnace (3) includes a heating chamber (31) and a baffle (32). The heating chamber (31) is used to accommodate the sample (4), and the baffle (32) is fixedly disposed at the inner end of the heating chamber (31). The two ends of the sample (4) abut against the detection rod (5) and the baffle (32) respectively.

2. The linear thermal expansion coefficient measuring instrument according to claim 1, characterized in that, The adjustment component (2) includes: The sliding shaft (22) is fixedly connected to the main body (1) through the end plate (21); The substrate (28) is slidably mounted on the slide shaft (22) via the slide seat (26).

3. The linear thermal expansion coefficient measuring instrument according to claim 2, characterized in that, The substrate (28) is threadedly connected to a support column (25), and the heating furnace (3) is supported on the upper end of the support column (25).

4. The linear thermal expansion coefficient measuring instrument according to claim 3, characterized in that, The lower end of the support column (25) is threaded with a second nut (24), which abuts against the base plate (28).

5. The linear thermal expansion coefficient measuring instrument according to claim 2, characterized in that, The lower end of the heating furnace (3) is provided with a connecting column (33), which passes through the substrate (28).

6. The linear thermal expansion coefficient measuring instrument according to claim 5, characterized in that, The lower end of the connecting post (33) is threaded with a first nut (23), which abuts against the base plate (28).

7. The linear thermal expansion coefficient measuring instrument according to claim 2, characterized in that, The base plate (28) is threaded with a positioning bolt (27), the lower end of which presses against the slide shaft (22).

8. The linear thermal expansion coefficient measuring instrument according to claim 1, characterized in that, The detection rod (5) has a hole for accommodating the sample (4), and the inner end of the hole is provided with a top rod (51) that can slide axially. The top rod (51) is connected to the displacement sensor (7).

9. The linear thermal expansion coefficient measuring instrument according to claim 8, characterized in that, A vertical plate (6) is fixedly connected to the main body (1), the displacement sensor (7) is fixedly installed on the vertical plate (6), and the detection rod (5) is coaxially arranged with the heating cavity (31).

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