Device for detecting the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing

Abstract

This utility model provides a device for testing the thermal expansion coefficient of pharmaceutical borosilicate glass tubing, belonging to the field of physical testing technology. The utility model includes a thermal expansion testing machine. By setting an adjusting limiting device, after the inner wall of the pharmaceutical borosilicate glass tubing is fitted onto the outer surface of a hollow rod and several limiting plates, the threaded rod can be rotated a certain number of turns according to the inner diameter of the pharmaceutical borosilicate glass tubing. This causes two grooved frames to slide a certain distance in opposite directions within the inner wall of the hollow rod, thereby causing a connecting rod to rotate within the grooved frames and limiting plates, pushing the limiting plates outwards so that their outer surfaces are tightly attached to the inner wall of the pharmaceutical borosilicate glass tubing, thus limiting and fixing it. Through this adjustment, limiting can be performed on pharmaceutical borosilicate glass tubing of various inner diameters, eliminating the need for frequent replacement of the hollow rod, improving testing efficiency, reducing equipment purchase costs, enhancing the adaptability of the thermal expansion testing machine, and facilitating its use.

Description

Technical Field

[0001] This utility model relates to the field of physical testing technology, and in particular to a device for detecting the thermal expansion coefficient of pharmaceutical borosilicate glass pipelines. Background Technology

[0002] The thermal expansion coefficient testing device is an experimental device used to measure the dimensional changes of pharmaceutical borosilicate glass tubing due to thermal expansion during temperature changes.

[0003] Most commercially available devices for testing the thermal expansion coefficient of pharmaceutical borosilicate glass tubing use a fixed-size hollow rod to limit and fix the tubing. However, since pharmaceutical borosilicate glass tubing comes in various inner diameters in practical applications, this fixed-size hollow rod cannot flexibly adapt to tubing of different inner diameters. When encountering a glass tubing with an inner diameter that does not match the hollow rod, it is necessary to replace it with a compatible hollow rod for limiting and fixing. This not only increases equipment purchase costs but also reduces testing efficiency. Utility Model Content

[0004] The technical problem this invention aims to solve is that most commercially available devices for testing the thermal expansion coefficient of pharmaceutical borosilicate glass tubing use a fixed-size hollow rod to limit and fix the glass tubing. However, since pharmaceutical borosilicate glass tubing comes in various inner diameters in practical applications, this fixed-size hollow rod cannot flexibly adapt to tubing with different inner diameters. When faced with a glass tubing whose inner diameter does not match the hollow rod, it is necessary to replace it with a matching hollow rod for limiting and fixing. This not only increases equipment purchase costs but also reduces testing efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a device for detecting the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing, including a thermal expansion testing machine. A bracket is fixedly installed on one side of the thermal expansion testing machine, a heating furnace is slidably installed on one side of the thermal expansion testing machine, and an electric telescopic rod is fixedly installed on one side of the thermal expansion testing machine. The output end of the electric telescopic rod is fixedly installed on one side of the heating furnace. An adjusting limit device is provided on one side of the bracket. The adjusting limit device can drive two grooved frames to move in opposite directions through a threaded rod, and change the distance between the limit plate and the hollow rod by squeezing and pushing the limit plate through a connecting rod. In this way, pharmaceutical borosilicate glass tubing of various inner diameters can be limited and fixed.

[0006] The aforementioned components achieve the following effect: When using a thermal expansion testing machine to test the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing, the tubing can be fitted onto the adjusting and limiting device according to its inner diameter, and then adjusted and fixed in place. The electric telescopic rod is then activated to move the heating furnace onto the outer surface of the tubing, uniformly heating it and monitoring temperature changes in real time. A high-precision displacement sensor installed in the heating furnace captures the linear expansion displacement of the tubing due to temperature rise, while simultaneously recording the heating temperature data. Based on the formula for calculating the coefficient of thermal expansion, the relationship between temperature and displacement is converted into a specific coefficient of thermal expansion value, thereby achieving accurate testing of the thermal expansion characteristics of the pharmaceutical borosilicate glass tubing.

[0007] Preferably, the adjusting limiting device includes a hollow rod, one end of which is installed through and mounted on one side of the bracket, and the inner wall of the hollow rod has several sliding holes; a threaded rod, one end of which is installed through and mounted on one side of the inner wall of the hollow rod, and the threads on the outer surfaces of the two ends of the threaded rod are in opposite directions; two grooved frames, the outer surfaces of which are slidably mounted in the inner wall of the hollow rod, and the inner walls of which are threadedly connected to the outer surfaces of the two ends of the threaded rod; several limiting plates, one side of which is symmetrically and rotatably mounted with connecting rods, the other ends of which are installed through the inner walls of the sliding holes and rotatably mounted in the inner walls of the grooved frames; a locking block, one side of which is fixedly mounted on one side of the threaded rod; and a fixing mechanism, which is disposed between the inner wall of the locking block and the bracket, for limiting and fixing the rotating locking block.

[0008] The effect achieved by the above components is as follows: By setting an adjustment limiting device, after the inner wall of the pharmaceutical borosilicate glass tubing is fitted onto the outer surface of the hollow rod and several limiting plates, the threaded rod can be rotated a certain number of times within the inner wall of the hollow rod by holding the locking block according to the inner diameter of the pharmaceutical borosilicate glass tubing. This causes the two grooved frames to slide a certain distance in opposite directions within the inner wall of the hollow rod, which in turn causes the connecting rod to rotate within the grooved frames and the limiting plates, pushing the limiting plates outward so that their outer surfaces are tightly attached to the inner wall of the pharmaceutical borosilicate glass tubing, thus limiting and fixing it. Then, the fixing mechanism fixes and limits the adjusted locking block and threaded rod, making it difficult for the threaded rod to reverse, thus improving the stability of the limiting. Through this adjustment, pharmaceutical borosilicate glass tubing with various inner diameters can be limited without frequent replacement of the hollow rod, improving testing efficiency, reducing equipment purchase costs, improving the adaptability of the thermal expansion testing machine, and making it convenient to use.

[0009] Preferably, the longitudinal section of the limiting plate is arc-shaped.

[0010] The effect achieved by the above components is that by setting the limiting plate in an arc shape, its outer surface can fit more closely to the inner wall of the pharmaceutical borosilicate glass tubing, thus improving the limiting effect.

[0011] Preferably, bearings are fixedly installed on both sides of the inner wall of the groove frame and both sides of the inner wall of the limiting plate, wherein the inner rings of several bearings are fixedly installed on the outer surfaces of both ends of the connecting rod.

[0012] The effect achieved by the above components is that by setting bearings, the rotational wear between the connecting rod and the limiting plate and the inner wall of the groove frame can be reduced, thereby increasing the service life of the three components and facilitating the rotation of the connecting rod.

[0013] Preferably, a plurality of anti-slip protrusions are fixedly installed on one side of the limiting plate, and the plurality of anti-slip protrusions are arranged at equal intervals.

[0014] The effect achieved by the above components is that by setting anti-slip protrusions, the roughness of the surface of the limiting plate can be increased, making it more secure when it abuts against the inner wall of the pharmaceutical borosilicate glass tubing.

[0015] Preferably, the fixing mechanism includes a locking rod, wherein the locking rod is installed through the inner wall of the locking hole block, and a plurality of locking slots are provided on one side of the bracket, wherein one end of the locking rod is inserted into the inner wall of the locking slot; and a spring, wherein the inner wall of the spring is sleeved on the outer surface of one end of the locking rod, and both ends are respectively fixedly installed on one side of the locking rod and one side of the locking hole block.

[0016] The effect achieved by the above-mentioned components is as follows: By setting a fixing mechanism, when it is necessary to rotate the threaded rod, the locking rod can be pulled to one end in the inner wall of the locking block, causing the spring to contract and pull one end out of the locking groove. Then the locking block and the threaded rod can be rotated. After the rotation adjustment is completed, the locking rod can be released, and under the reset action of the spring, one end can be locked into the corresponding locking groove to limit and fix the threaded rod, making it less likely for the threaded rod to reverse, thus improving the firmness of the limit.

[0017] Preferably, a pull block is fixedly installed on one side of the lever, wherein the pull block is located on the side of the lever away from the spring.

[0018] The effect achieved by the above components is that by setting up the pull block, the contact area on one side of the lever can be increased, making it easier to manually hold and pull it.

[0019] Preferably, the outer surface of the locking rod is rotatably mounted on the rotating block, wherein the rotating block is inserted into the inner wall of the locking hole block.

[0020] The effect achieved by the above-mentioned components is as follows: by setting the rotating block, when the locking rod is pulled out of the locking slot, the rotating block will be pulled out of the inner wall of the locking hole block. At this time, the rotating block can be rotated to a certain angle, so that one side of it can be abutted against one side of the locking hole block. After the locking rod is pulled out of the locking slot, it is limited to one side of the locking hole block. In this way, when rotating the threaded rod, it is not necessary to keep pulling the locking rod, which makes it convenient to rotate and adjust the threaded rod.

[0021] The beneficial effects of this utility model are:

[0022] By setting an adjustable limiting device, after the inner wall of the pharmaceutical borosilicate glass tubing is fitted onto the outer surface of the hollow rod and several limiting plates, the threaded rod can be turned a certain number of times according to the inner diameter of the pharmaceutical borosilicate glass tubing. This causes the two grooved frames to slide a certain distance in opposite directions within the inner wall of the hollow rod. Consequently, the connecting rod rotates within the grooved frames and the limiting plates, pushing the limiting plates outward so that their outer surfaces are tightly pressed against the inner wall of the pharmaceutical borosilicate glass tubing, thus limiting and fixing it. Through this adjustment, pharmaceutical borosilicate glass tubing with various inner diameters can be limited without frequent replacement of the hollow rod, improving testing efficiency, reducing equipment purchase costs, enhancing the adaptability of the thermal expansion testing machine, and making it more convenient to use. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a three-dimensional structural diagram of the thermal expansion testing machine of this utility model;

[0026] Figure 3 for Figure 2 A three-dimensional schematic diagram of a local structure;

[0027] Figure 4 This is a three-dimensional structural diagram of the threaded rod of this utility model;

[0028] Figure 5 for Figure 3 A three-dimensional schematic diagram of a partial structure at the middle limiting plate;

[0029] Figure 6 for Figure 3 A three-dimensional schematic diagram of the partial structure at the card hole block.

[0030] Legend: 1. Thermal expansion testing machine; 2. Adjustment and limiting device; 3. Bracket; 4. Electric telescopic rod; 5. Heating furnace; 21. Hollow rod; 22. Sliding hole; 23. Threaded rod; 24. Groove frame; 25. Limiting plate; 26. Connecting rod; 27. Bearing; 28. Anti-slip protrusion; 29. ​​Fixing mechanism; 291. Locking rod; 292. Spring; 293. Locking groove; 294. Rotating block; 295. Pulling block; 210. Locking hole block. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Figure 1-6The device for testing the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing shown includes a thermal expansion testing machine 1, a bracket 3 fixedly mounted on one side of the thermal expansion testing machine 1, a heating furnace 5 (Lenton 1500°C Laboratory Furnace) slidably mounted on one side of the thermal expansion testing machine 1, an electric telescopic rod 4 fixedly mounted on one side of the thermal expansion testing machine 1, wherein the output end of the electric telescopic rod 4 is fixedly mounted on one side of the heating furnace 5, and an adjusting limit device 2 is provided on one side of the bracket 3. The adjusting limit device 2 can drive two grooved frames 24 to move in opposite directions through a threaded rod 23, and change the distance between the limit plate 25 and the hollow rod 21 by pressing and pushing the limit plate 25 through a connecting rod 26. In this way, pharmaceutical borosilicate glass tubing of various inner diameters can be limited and fixed. When using the thermal expansion testing machine 1 to test the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing, the tubing can be fitted onto the adjusting and limiting device 2 according to its inner diameter. After adjustment, the tubing is fixed in place. Then, the electric telescopic rod 4 is activated to drive the heating furnace 5 onto the outer surface of the tubing, uniformly heating it and monitoring the temperature change in real time. The high-precision displacement sensor in the heating furnace 5 captures the linear expansion displacement of the tubing caused by the temperature rise, and simultaneously records the temperature data of the heating furnace 5. Based on the formula for calculating the coefficient of thermal expansion, the relationship between temperature and displacement is converted into a specific value of the coefficient of thermal expansion, thereby achieving accurate testing of the thermal expansion characteristics of the pharmaceutical borosilicate glass tubing.

[0034] Figure 1-6The adjustable limiting device 2 shown includes a hollow rod 21, one end of which is installed through and mounted on one side of the bracket 3, and the inner wall of the hollow rod 21 has several sliding holes 22; a threaded rod 23, one end of which is installed through and mounted on one side of the inner wall of the hollow rod 21, and the threads on the outer surfaces of the two ends of the threaded rod 23 are in opposite directions; two grooved frames 24, the outer surfaces of which are slidably mounted in the inner wall of the hollow rod 21, and the inner walls are threadedly connected to the outer surfaces of the two ends of the threaded rod 23; several limiting plates 25, one side of which is symmetrically and rotatably mounted with connecting rods 26, the other ends of which are installed through the inner walls of the sliding holes 22 and rotatably mounted in the inner walls of the grooved frames 24; a locking block 210, one side of which is fixedly mounted on one side of the threaded rod 23; and a fixing mechanism 29, which is disposed between the inner wall of the locking block 210 and the bracket 3, and is used to limit and fix the rotating locking block 210. By setting the adjusting limiting device 2, after the inner wall of the pharmaceutical borosilicate glass tubing is fitted onto the outer surface of the hollow rod 21 and several limiting plates 25, the threaded rod 23 can be rotated a certain number of times within the inner wall of the hollow rod 21 by holding the locking block 210 according to the inner diameter of the pharmaceutical borosilicate glass tubing. This causes the two grooved brackets 24 to slide a certain distance in opposite directions within the inner wall of the hollow rod 21. Consequently, the connecting rod 26 can rotate within the inner walls of the grooved brackets 24 and the limiting plates 25, pushing the limiting plates 25 outward. The outer surface of the tube is pressed tightly against the inner wall of the pharmaceutical borosilicate glass tubing, thus limiting and fixing it. Then, the fixing mechanism 29 fixes and limits the adjusted locking block 210 and threaded rod 23, making it less likely for the threaded rod 23 to reverse, thus improving the stability of the limit. Through this adjustment, the limit can be applied to pharmaceutical borosilicate glass tubing with various inner diameters, eliminating the need for frequent replacement of the hollow rod 21, improving testing efficiency, reducing equipment purchase costs, improving the adaptability of the thermal expansion testing machine 1, and making it more convenient to use.

[0035] Figure 1-6 The longitudinal section of the limiting plate 25 shown is arc-shaped. By setting the limiting plate 25 to an arc shape, its outer surface can fit more closely to the inner wall of the pharmaceutical borosilicate glass tubing, improving the limiting effect. Bearings 27 are fixedly installed on both sides of the inner wall of the groove frame 24 and both sides of the inner wall of the limiting plate 25, with the inner rings of several bearings 27 respectively fixedly installed on the outer surfaces of both ends of the connecting rod 26. By setting the bearings 27, the rotational wear between the connecting rod 26 and the inner wall of the limiting plate 25 and the groove frame 24 can be reduced, improving the service life of all three and facilitating the rotation of the connecting rod 26. Several anti-slip protrusions 28 are fixedly installed on one side of the limiting plate 25, and the anti-slip protrusions 28 are arranged at equal intervals. By setting the anti-slip protrusions 28, the surface roughness of the limiting plate 25 can be increased, making it more firmly attached to the inner wall of the pharmaceutical borosilicate glass tubing.

[0036] Figure 1-6 The fixing mechanism 29 shown includes a locking rod 291, which is installed through the inner wall of the locking hole block 210. A plurality of locking slots 293 are provided on one side of the bracket 3, wherein one end of the locking rod 291 is inserted into the inner wall of the locking slot 293; and a spring 292, wherein the inner wall of the spring 292 is sleeved on the outer surface of one end of the locking rod 291, and both ends are fixedly installed on one side of the locking rod 291 and one side of the locking hole block 210, respectively. By setting the fixing mechanism 29, when it is necessary to rotate the threaded rod 23, the locking rod 291 can be pulled to one end in the inner wall of the locking block 210, causing the spring 292 to contract and pull one end out of the locking groove 293. Then the locking block 210 and the threaded rod 23 can be rotated. After the rotation adjustment is completed, the locking rod 291 can be released, so that under the reset action of the spring 292, one end can be locked into the corresponding locking groove 293 to limit and fix the threaded rod 23, making it less likely for the threaded rod 23 to reverse and improving the firmness of the limit.

[0037] Figure 1-6 A pull block 295 is fixedly installed on one side of the lever 291, with the pull block 295 positioned on the side of the lever 291 away from the spring 292. By installing the pull block 295, the contact area on one side of the lever 291 is increased, making it easier to manually grip and pull. The outer surface of the lever 291 is rotatably mounted on a rotating block 294, which is inserted into the inner wall of the locking hole block 210. With the rotating block 294 installed, when the lever 291 is pulled out of the slot 293, the rotating block 294 is pulled out of the inner wall of the locking hole block 210. At this point, the rotating block 294 can be rotated to a certain angle, allowing one side of it to abut against one side of the locking hole block 210. After the lever 291 is pulled out of the slot 293, it is limited to one side of the locking hole block 210. Therefore, when rotating the threaded rod 23, it is not necessary to continuously pull the lever 291, facilitating the rotation and adjustment of the threaded rod 23.

[0038] Working principle: When using the thermal expansion testing machine 1 to test the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing, the tubing is first fitted onto the outer surface of the hollow rod 21 and several limiting plates 25 according to its inner diameter. Then, by holding the pull block 295, the clamping rod 291 is pulled towards one end within the inner wall of the clamping block 210, causing the spring 292 to contract and pull one end out of the clamping groove 293. This causes the rotating block 294 to be pulled out of the inner wall of the clamping block 210. The rotating block 294 can then be rotated to a certain angle to... Place one side of the locking block 210 against the other side of the locking rod 291. After pulling the locking rod 291 out of the locking slot 293, it is limited to one side of the locking block 210. This way, when rotating the threaded rod 23, it is not necessary to keep pulling the locking rod 291. Hold the locking block 210 and rotate the threaded rod 23 in the inner wall of the hollow rod 21 a certain number of turns. This will drive the two grooved brackets 24 to slide in opposite directions in the inner wall of the hollow rod 21 a certain distance. This will then drive the connecting rod 26 to rotate in the inner wall of the grooved brackets 24 and the limiting plate 25, pushing the limiting plate 25 outward and making its outer surface tight. The hollow rod 291 is attached to the inner wall of the pharmaceutical borosilicate glass tubing and fixed in place. Then, the rotating block 294 is rotated to align with the inner wall of the locking block 210, and the locking rod 291 is released. Under the reset action of the spring 292, one end can be locked into the corresponding slot 293, thus fixing the threaded rod 23 and preventing it from reversing, improving the stability of the fixation. Through this adjustment, borosilicate glass tubing of various inner diameters can be fixed, eliminating the need for frequent replacement of the hollow rod 21, improving testing efficiency, reducing equipment purchase costs, and enhancing overall performance. The thermal expansion testing machine 1 is easy to use and adaptable. Then, the electric telescopic rod 4 is activated to drive the heating furnace 5 to be placed on the outer surface of the pharmaceutical borosilicate glass pipeline. The pipeline is heated evenly and the temperature change is monitored in real time. The high-precision displacement sensor set in the heating furnace 5 captures the linear expansion displacement of the pipeline caused by the temperature rise. At the same time, the temperature data of the heating furnace 5 is recorded. Then, according to the thermal expansion coefficient calculation formula, the correspondence between temperature and displacement is converted into a specific thermal expansion coefficient value, thereby realizing the accurate detection of the thermal expansion characteristics of the pharmaceutical borosilicate glass pipeline.

[0039] 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 device for detecting the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing, comprising a thermal expansion testing machine (1), characterized in that: A bracket (3) is fixedly installed on one side of the thermal expansion testing machine (1), a heating furnace (5) is slidably installed on one side of the thermal expansion testing machine (1), and an electric telescopic rod (4) is fixedly installed on one side of the thermal expansion testing machine (1). The output end of the electric telescopic rod (4) is fixedly installed on one side of the heating furnace (5). An adjustment limiting device (2) is provided on one side of the bracket (3). The adjustment limiting device (2) can drive two grooved frames (24) to move in opposite directions through a threaded rod (23). The distance between the limiting plate (25) and the hollow rod (21) is changed by squeezing and pushing the limiting plate (25) through the connecting rod (26). In this way, pharmaceutical borosilicate glass pipelines with various inner diameters can be limited and fixed.

2. The device for detecting the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing according to claim 1, characterized in that: The adjusting limit device (2) includes a hollow rod (21), one end of which is installed through the bracket (3) on one side, and the inner wall of the hollow rod (21) is provided with a plurality of sliding holes (22). A threaded rod (23), wherein one end of the threaded rod (23) is installed through the inner wall of the hollow rod (21), and the threads on the outer surfaces of the two ends of the threaded rod (23) are in opposite directions; Two grooved brackets (24), wherein the outer surface of the grooved brackets (24) is slidably mounted in the inner wall of the hollow rod (21), and the inner wall is threadedly connected to the outer surfaces of both ends of the threaded rod (23); Several limiting plates (25) are provided, and connecting rods (26) are symmetrically and rotatably installed on one side of the inner wall of the limiting plate (25). The other ends of two connecting rods (26) pass through the inner wall of the sliding hole (22) and are rotatably installed in the inner wall of the groove frame (24). A locking block (210), wherein one side of the locking block (210) is fixedly installed on one side of the threaded rod (23); The fixing mechanism (29) is located between the inner wall of the card block (210) and the bracket (3) and is used to limit and fix the card block (210) after rotation.

3. The device for detecting the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing according to claim 2, characterized in that: The longitudinal section of the limiting plate (25) is arc-shaped.

4. The device for detecting the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing according to claim 2, characterized in that: Bearings (27) are fixedly installed on both sides of the inner wall of the groove frame (24) and both sides of the inner wall of the limiting plate (25), and the inner rings of several bearings (27) are fixedly installed on the outer surfaces of both ends of the connecting rod (26).

5. The device for detecting the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing according to claim 2, characterized in that: A plurality of anti-slip protrusions (28) are fixedly installed on one side of the limiting plate (25), and the plurality of anti-slip protrusions (28) are arranged at equal distances.

6. The device for detecting the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing according to claim 2, characterized in that: The fixing mechanism (29) includes a locking rod (291), wherein the locking rod (291) is installed through the inner wall of the locking hole block (210), and a plurality of locking slots (293) are provided on one side of the bracket (3), wherein one end of the locking rod (291) is inserted into the inner wall of the locking slot (293); Spring (292), wherein the inner wall of spring (292) is sleeved on the outer surface of one end of the clamping rod (291), and both ends are respectively fixed on one side of the clamping rod (291) and one side of the clamping hole block (210).

7. The device for detecting the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing according to claim 6, characterized in that: A pull block (295) is fixedly installed on one side of the lever (291), wherein the pull block (295) is located on the side of the lever (291) away from the spring (292).

8. The device for detecting the coefficient of thermal expansion of pharmaceutical borosilicate glass tubing according to claim 6, characterized in that: The outer surface of the lever (291) is rotatably mounted on the rotating block (294), wherein the rotating block (294) is inserted into the inner wall of the locking block (210).

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