High-temperature creep test device capable of being stretched in delayed manner
By designing a high-temperature creep test device including support components, tensile mechanisms and delayed triggering mechanisms, the problem that traditional devices cannot delay triggering is solved, and accurate tensile tests of polymer materials at high temperatures are achieved, and the reliability of test results and the practicality of equipment are improved.
Patent Information
- Application Number
- CN202510507108.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2025-07-25
AI Technical Summary
The traditional tensile creep test device cannot set a delay trigger, resulting in the need to open the environmental box twice when testing polymer materials in high temperature environments, affecting the accuracy of the test results.
A high-temperature creep testing device including a support assembly, a tensile mechanism, a delay trigger mechanism and a wind power assembly is designed to achieve delayed stretching using the lever principle and mechanical structure to avoid secondary opening of the environmental box.
It realizes automatic delay tensile polymer material at high temperatures, improves the accuracy of test results, reduces equipment cost and maintenance difficulty, and is suitable for high-temperature harsh environments.
Smart Images
Figure CN120369488A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of polymer material performance testing, and particularly to a high-temperature creep test device capable of delaying stretching. Background Art
[0002] Tensile creep test is an important means to evaluate the deformation behavior of materials under high temperature and continuous stress, and is widely used in fields such as aerospace, energy, and automotive. Traditional creep test equipment usually uses metal specimens and is equipped with complex mechanical and electronic control systems to achieve precise stress loading and temperature control. However, with the increasing wide application of polymer materials in high-temperature environments, traditional metal test equipment faces many challenges when testing polymer materials.
[0003] High-temperature tensile creep test needs to be carried out at a relatively high ambient temperature, usually up to several hundred degrees. The polymer material needs to be placed in an environmental chamber for testing. And to ensure the accuracy of the test, the polymer material needs to be kept warm in the high-temperature environment of the environmental chamber for a period of time to make the performance of the polymer material stabilize slowly before opening the environmental chamber for stretching operation. However, opening the environmental chamber for the second time will have a certain impact on the high-temperature environment, thus indirectly affecting the characteristics of the polymer material and reducing the accuracy of the test results. And traditional tensile creep test devices cannot set a delay trigger and need to open the environmental chamber for the second time to carry out the stretching operation, so they do not meet the requirements of high-temperature tensile creep test.
[0004] Aiming at the problem that traditional tensile creep test devices cannot set a delay trigger, no effective solution has been proposed yet. Summary of the Invention
[0005] In the present invention, a high-temperature creep test device capable of delaying stretching is provided to solve the problem that traditional tensile creep test devices cannot set a delay trigger.
[0006] In the present invention, a high-temperature creep test device capable of delaying stretching is provided, including:
[0007] A support assembly, which includes a first support frame and a second support frame arranged vertically;
[0008] A stretching mechanism, which includes a mounting rod and a counterweight. The mounting rod is rotationally connected to the top end of the first support frame through a first horizontal rotating shaft, and the counterweight is arranged on one side of the mounting rod close to the second support frame;
[0009] A delay trigger mechanism, which includes a supporting block, a sliding block, a first telescopic spring, a pressing plate, a disc and a swing rod arranged obliquely. The supporting block is fixedly installed at the top end of the second support frame. A first horizontal chute is provided on the side wall of the supporting block. The sliding block is slidably installed in the first horizontal chute. The two ends of the first telescopic spring are respectively fixedly connected to the end wall of the first horizontal chute and the sliding block. The lower end of the pressing plate is rotatably connected to the sliding block. A bayonet is provided on the bottom wall of the first horizontal chute. The lower end of the swing rod is rotatably installed on the second support frame through a second horizontal rotating shaft. The disc is rotatably installed on the second support frame through a third horizontal rotating shaft. Both the second horizontal rotating shaft and the third horizontal rotating shaft are perpendicular to the first horizontal rotating shaft. A convex column is provided on the swing rod, and a notch matching with the convex column is provided on the disc;
[0010] A spring power assembly, which is used to drive the disc to rotate;
[0011] A clamping mechanism, which includes a pair of fixture assemblies. One fixture assembly is installed at the bottom end of the first support frame, and the other fixture assembly is installed at the first end of the mounting rod. The two fixture assemblies are respectively used to clamp the upper end and the lower end of the material to be tested;
[0012] In the tensile preparation state after the high-temperature creep test device is started, the upper end of the pressing plate abuts against the second end of the mounting rod. The first telescopic spring fixedly connected to the sliding block exerts a force on the sliding block to make the sliding block have a moving tendency. The upper end of the swing rod extends into the bayonet and abuts against the sliding block to block the movement of the sliding block. The surface of the disc supports the convex column.
[0013] In some of the embodiments, each fixture assembly includes:
[0014] A clamp body and a pair of chuck components. The two clamp bodies are respectively rotatably installed on the mounting rod and the first support frame. Each chuck component includes a threaded rod, an I-shaped push rod, a second telescopic spring and a clamping block. The threaded rod is horizontally threadedly installed on the clamp body. A horizontal sliding hole and second and third horizontal chutes respectively communicating with both ends of the horizontal sliding hole are provided inside the clamping block. The I-shaped push rod is slidably installed in the horizontal sliding hole. The first end of the I-shaped push rod is located in the second horizontal chute and the second end is located in the third horizontal chute. The mutually approaching ends of the two threaded rods both pass through the clamp body and are respectively fixedly connected to the first ends of the two I-shaped push rods. The second telescopic spring is located in the second horizontal chute and sleeved on the I-shaped push rod. The diameter of the first end of the I-shaped push rod is larger than the diameter of the second telescopic spring, and the diameter of the second end of the I-shaped push rod is larger than the diameter of the horizontal sliding hole.
[0015] In some of the embodiments, the spring power assembly includes:
[0016] A barrel, a barrel gear, and a driven spur gear. The barrel is fixedly installed on the second support frame. The barrel gear and the driven spur gear are both rotatably installed on the inner wall of the barrel. A barrel key is coaxially fixed to the barrel gear. The driven spur gear is coaxially fixed to the disc. The barrel gear is a double-layer spur gear, and its smaller-radius spur gear meshes with the driven spur gear. The rotation of the barrel gear is powered by the energy stored when turning the barrel key.
[0017] In some of these embodiments, the barrel power assembly further includes:
[0018] A first reduction gear and a second reduction gear rotatably installed on the inner wall of the barrel. The first reduction gear is a double-layer spur gear, and its smaller-radius spur gear meshes with the larger-radius spur gear of the barrel gear. The second reduction gear is a double-layer spur gear, and its smaller-radius spur gear meshes with the larger-radius spur gear of the first reduction gear.
[0019] In some of these embodiments, the barrel power assembly further includes:
[0020] A hairspring balance wheel, an escapement fork, and an escapement wheel rotatably installed on the inner wall of the barrel. The escapement fork is Y-shaped. The escapement wheel is a double-layer wheel, and its smaller-radius spur gear meshes with the larger-radius spur gear of the second reduction gear, and its larger-radius ratchet wheel meshes with the two Y-shaped ends of the escapement fork.
[0021] In some of these embodiments, the supporting block is provided with a telescopic rod for restricting the maximum displacement distance of the pressing plate. The first end of the telescopic rod is rotatably installed on the pressing plate, and the second end is rotatably installed on the supporting block.
[0022] In some of these embodiments, the mounting rod is a slide rail. The counterweight block is slidably installed on the mounting rod. A locking nut is threadedly installed on the top of the counterweight block. The bottom end of the locking nut is fixedly connected with a friction block. The mounting rod is located on the moving track of the friction block.
[0023] In some of these embodiments, a corresponding horizontal scale is provided on the mounting rod.
[0024] In some of these embodiments, the swing rod includes a first rod portion and a second rod portion that are perpendicular to each other. The first rod portion is arranged at the upper end of the second rod portion. The lower end of the second rod portion is rotatably installed on the second support frame through a second horizontal rotating shaft. A convex column is arranged on the second rod portion. The first rod portion can extend into the bayonet to press against the slider.
[0025] In some of these embodiments, multiple clamping blocks are all T-shaped. The mutually approaching ends of the two clamping blocks in each chuck component are T-shaped heads.
[0026] Compared with the related art, the present invention has the following beneficial effects:
[0027] 1. By setting the counterweight on the side of the mounting rod close to the second support frame, the gravity of the counterweight, in conjunction with the lever principle, can cause the mounting rod to tend to rotate around the first horizontal rotating shaft. In the tensile preparation state after the start of the high-temperature creep test device, the upper end of the pressure plate abuts against the second end of the mounting rod. The first extension spring fixedly connected to the slider exerts a force on the slider to give the slider a tendency to move. The upper end of the swing rod extends into the bayonet and abuts against the slider to block the movement of the slider. The surface of the disc supports the convex column. Therefore, the tensile mechanism does not start to stretch immediately. As the clockwork power component drives the rotation of the disc, when the disc rotates to the position where the convex column falls into the notch, the upper end of the swing rod disengages from the bayonet. The slider starts to move under the action of the first extension spring, and finally cancels the abutment of the upper end of the pressure plate against the second end of the mounting rod. The mounting rod rotates, and the two fixture components move away from each other, thereby stretching the test material being clamped. Before using the device, configure the tensile mechanism and place the test material. Then, turn the clockwork to start the device, and then close the environmental chamber. The device will automatically start stretching the test material after a delay period, eliminating the need to open the environmental chamber a second time, solving the problem that traditional tensile creep test devices cannot set a delay trigger, ensuring that the properties of polymer materials are not affected, and improving the accuracy of test results.
[0028] 2. By placing the test material into the clamping space formed by the two clamping blocks, then holding the two handles and synchronously rotating the two threaded rods, the first end of each I-shaped push rod will exert a thrust on the second extension spring, causing the two clamping blocks to approach each other and contact the test material. Continuing to rotate the threaded rods, the second extension spring located in the second horizontal chute will be gradually compressed by the first end of the I-shaped push rod. The second end of the I-shaped push rod gradually approaches the inner bottom wall of the third horizontal chute until they abut. At this time, the test material is clamped, and a certain amount of elastic potential energy is stored in the second extension spring. When the test material is stretched, its clamped volume will gradually decrease. At this time, the elastic potential energy in the second extension spring is gradually released, the second end of the I-shaped push rod gradually moves away from the inner bottom wall of the third horizontal chute, and the clamping space between the two clamping blocks will continue to become smaller, thereby maintaining the clamping effect on the test material and preventing the test material from falling off due to the decrease in the clamped volume after stretching.
[0029] 3. Further, by selecting counterweights of different masses to adjust the power magnitude, and by sliding the counterweight on the mounting rod to any distance and then fixing it with a locking nut, the length of the power arm can be adjusted steplessly, increasing the flexibility of the test.
[0030] 4. This high-temperature creep test device is composed of a pure mechanical structure, without any electric power source. It has a simple structure and reliable operation, is suitable for creep tests in harsh environments such as high temperatures, avoids the risk of electronic components failing in high-temperature environments, reduces the equipment cost and maintenance cost, and improves the practicality and popularity of the equipment.
[0031] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more concise and understandable. Description of the Drawings
[0032] Figure 1 is a side view of the high-temperature creep test device with delayable stretching in this embodiment;
[0033] Figure 2 is a schematic three-dimensional structure diagram of the high-temperature creep test device with delayable stretching in this embodiment;
[0034] Figure 3 is a partial structure diagram of the delay trigger mechanism in this embodiment;
[0035] Figure 4 is a partial structure diagram of the pressure plate and the first telescopic spring in this embodiment;
[0036] Figure 5 is a partial structure diagram of the clamping assembly in this embodiment;
[0037] Figure 6 is a partial structure diagram of the convex column and the notch in this embodiment;
[0038] Figure 7 is a partial structure diagram of the delay trigger mechanism in this embodiment;
[0039] Figure 8 is a partial structure diagram of the swing rod and the bayonet in this embodiment.
[0040] In the figure: 1. Delay trigger mechanism; 11. Support block; 12. Slide block; 13. First telescopic spring; 14. Pressure plate; 15. Bayonet; 16. Disc; 17. Swing rod; 18. Convex column; 19. Notch; 2. Stretching mechanism; 20. Telescopic rod; 21. Mounting rod; 22. Counterweight; 23. First support frame; 24. Second support frame; 25. Locking nut; 3. Clamping mechanism; 31. Clamping body; 32. Threaded rod; 33. I-shaped push rod; 34. Second telescopic spring; 35. Clamping block; 36. Second horizontal chute; 37. Third horizontal chute; 4. Spring power assembly; 41. Spring box; 42. Spring gear; 43. Driven spur gear; 44. First reduction wheel; 45. Second reduction wheel; 46. Hairspring pendulum wheel; 47. Escapement fork; 48. Escapement wheel. Detailed Embodiments
[0041] To more clearly understand the purpose, technical solution, and advantages of the present application, the present application is described and explained below with reference to the drawings and embodiments.
[0042] In this embodiment, a high-temperature creep test device capable of delaying stretching is provided. Refer to Figure 1 and Figure 2 As shown, the device includes a support assembly, a stretching mechanism 2, a delay triggering mechanism 1, a clamping mechanism 3, and a spring power assembly 4.
[0043] The support assembly includes a first support frame 23 and a second support frame 24 that are vertically arranged. The bottoms of the first support frame 23 and the second support frame 24 are vertically installed on a horizontal base and are located at both ends of the horizontal base respectively.
[0044] The stretching mechanism 2 includes a mounting rod 21 and a counterweight 22. The mounting rod 21 is rotationally connected to the top end of the first support frame 23 through a first horizontal rotating shaft. The counterweight 22 is arranged on one side of the mounting rod 21 close to the second support frame 24. The mounting rod 21 is perpendicular to the first support frame 23 and the second support frame 24. The gravity of the counterweight 22 and the lever principle can make the mounting rod 21 rotate around the first horizontal rotating shaft. Further, in this embodiment, the mounting rod 21 is a slide rail, and the counterweight 22 is slidably installed on the mounting rod 21. A locking nut 25 is threadedly installed on the top of the counterweight 22, and a friction block is fixedly connected to the bottom end of the locking nut 25. By sliding the counterweight 22 on the slide rail, the power arm can be changed, and then the locking nut 25 is tightened downward to make the friction block press against the upper surface of the mounting rod 21, so as to fix the counterweight 22 through friction. By selecting a suitable counterweight 22 to adjust the power, and by sliding the counterweight 22 at any distance on the mounting rod 21 and then fixing it with the locking nut 25, the length of the power arm can be adjusted steplessly, increasing the flexibility of the test. Exemplarily, a corresponding horizontal scale is provided on the mounting rod 21, and the horizontal scale can more intuitively display the length of the force arm, facilitating the operation and statistics of the staff.
[0045] Refer to Figure 7 As shown, the delay triggering mechanism 1 includes a supporting block 11, a slider 12, a first telescopic spring 13, a pressing plate 14, a disc 16, and a swing rod 17 arranged obliquely. The supporting block 11 is fixedly installed at the top end of the second support frame 24. The supporting block 11 is of a U-shaped structure, and the inner bottom wall of its U-shaped structure can be used to support one side of the mounting rod 21 close to the second support frame 24. Therefore, the maximum stretching distance of the device can be indirectly limited by setting the height of the second support frame 24. Refer to Figure 3As shown, the side wall of the supporting block 11 is provided with a first horizontal slide groove, and the first horizontal slide groove is arranged on any half side of the U-shaped structure of the supporting block 11. The slider 12 is slidably installed in the first horizontal slide groove, and the width of the slider 12 is consistent with the depth of the first horizontal slide groove. The two ends of the first telescopic spring 13 are respectively fixedly connected to the end wall of the first horizontal slide groove and the slider 12, and the lower end of the pressure plate 14 is fixedly connected to the slider 12, and the upper end of the pressure plate 14 extends out of the slide groove and is located below the second end of the mounting rod 21. The bottom wall of the first horizontal slide groove is provided with a bayonet 15, and the shape of the bayonet 15 is rectangular. The lower end of the rocker arm 17 is rotatably installed on the second support frame 24 through the second horizontal rotating shaft, and the disc 16 is rotatably installed on the second support frame 24 through the third horizontal rotating shaft. The second horizontal rotating shaft and the third horizontal rotating shaft are both perpendicular to the first horizontal rotating shaft. Figure 6 As shown, the swing rod 17 is provided with a boss 18, which is arranged at a position close to the lower end of the swing rod 17, and the disc 16 is provided with a notch 19 used in conjunction with the boss 18. When the disc 16 rotates to a specific position, the boss 18 just falls into the notch 19. Further, in this embodiment, the support block 11 is provided with a telescopic rod 20 for limiting the maximum displacement distance of the pressure plate 14. The first end of the telescopic rod 20 is rotatably mounted on the middle part of the pressure plate 14, and the second end thereof is rotatably mounted on the support block 11. The end of the first horizontal slide groove is provided with a convex portion for rotatably mounting the second end of the telescopic rod 20. When the pressure plate 14 slides in the first horizontal slide groove under the action of the first telescopic spring 13, the telescopic rod 20 can be extended and the two ends rotate respectively. The extended distance can be used to limit the maximum displacement distance of the pressure plate 14, and at the same time, it can prevent the slider 12 from escaping from the first horizontal slide groove during the sliding process. Exemplarily, the rocker arm 17 includes a first rod portion and a second rod portion which are perpendicular to each other. The first rod portion is arranged at the upper end of the second rod portion, and the lower end of the second rod portion is rotatably mounted on the second support frame 24 via a second horizontal rotating shaft. The boss 18 is arranged on the second rod portion, and the first rod portion can be extended into the bayonet 15 to press against the slider 12. The L-shaped bending design can make the upper end of the rocker arm 17 more firmly clamped at the bayonet.
[0046] The spring power assembly 4 is used to drive the disc 16 to rotate. Figure 4 and Figure 7As shown, in this embodiment, the spring power assembly 4 includes a spring box 41, a spring gear 42, and a driven spur gear 43. The spring box 41 is fixedly installed on the second support frame 24. The spring box 41 is designed with a flip cover to protect the internal parts. During the use of the device, the spring box 41 is in a closed state. The spring gear 42 and the driven spur gear 43 are both rotatably installed on the inner wall of the spring box 41. There are also two openings on the surface of the spring box 41 for the second horizontal shaft and the third horizontal shaft to pass through respectively. The second horizontal shaft and the third horizontal shaft are in rotational contact with the inner walls of the two openings respectively. The spring gear 42 is coaxially fixed with a spring key. The driven spur gear 43 is coaxially fixed with the disc 16. The spring gear 42 is a double-layer spur gear, and its smaller-radius spur gear meshes with the driven spur gear 43. The rotation of the spring gear 42 is powered by the energy stored when turning the spring key. There is a spring opening on the surface of the spring box 41 for the spring key to pass through. The spring key is rotatably installed inside the spring opening and is connected to the spring gear 42. By rotating the spring key, the spring is wound up. The wound-up spring stores elastic potential energy, which can drive the rotation of the spring gear 42 and thus drive the rotation of the disc 16. Further, the spring power assembly 4 further includes a first reduction gear 44 and a second reduction gear 45 rotatably installed on the inner wall of the spring box 41. The first reduction gear 44 is a double-layer spur gear, and its smaller-radius spur gear meshes with the larger-radius spur gear of the spring gear 42. The second reduction gear 45 is a double-layer spur gear, and its smaller-radius spur gear meshes with the larger-radius spur gear of the first reduction gear 44. The rotation of the larger-radius spur gear of the spring gear 42 will drive the rotation of the first reduction gear 44, and then the first reduction gear 44 will drive the rotation of the second reduction gear 45. By meshing two gears with different gear ratios and using the gear ratio to change the speed and torque, a deceleration effect can be achieved, so as to meet different motion and power requirements. In this embodiment, the high speed of the small gear is transmitted to the large gear through gear meshing. Since the large gear has more teeth, its speed is reduced, thus achieving deceleration.In order to regularly release the elastic potential energy of the mainspring and accurately measure and control the rotation period of the mainspring gear, in this embodiment, the mainspring power assembly 4 further includes a balance wheel 46, an escapement fork 47, and an escapement wheel 48 that are rotatably mounted on the inner wall of the mainspring box 41. The escapement fork 47 is in a Y shape, and the escapement wheel 48 is a double-layer wheel. The spur gear with a smaller radius of the escapement wheel 48 meshes with the spur gear with a larger radius in the second reduction wheel 45, and the ratchet wheel with a larger radius of the escapement wheel 48 meshes with the two ends of the escapement fork 47 in a Y shape. When the balance wheel 46 vibrates in one direction, the inertia of the balance wheel 46 will cause the escapement fork 47 to swing to one side, and one of the jewel tips will push a tooth of the escapement wheel 48 forward; when the balance wheel 46 vibrates in the other direction, the other jewel tip will prevent the further rotation of the escapement wheel 48 until the balance wheel 46 swings in the reverse direction again. This alternating action of "catching" (preventing) and "releasing" enables the escapement wheel 48 to rotate in a regular step-by-step manner. Under the action of the elastic force of the hairspring in the balance wheel 46, it performs regular reciprocating vibrations, and the period of each vibration is fixed, usually from 1 / 2 second to 1 / 6 second. By reasonably setting the initial position of the notch 19 on the disc 16, a delay trigger within the range of 0 - 1 hour can be achieved.
[0047] Refer to Figure 2 and Figure 5As shown, the clamping mechanism 3 includes a pair of fixture components. One of the fixture components is mounted on the first support frame 23, with the first horizontal rotating shaft as the fulcrum. The horizontal distance from this fixture component to the first horizontal rotating shaft is the resistance arm, and the horizontal distance from the first horizontal rotating shaft to the counterweight 22 is the power arm. The length of the power arm is much greater than the length of the resistance arm, thus forming a labor-saving lever, which can reduce the size of the power source to a certain extent, that is, the counterweight 22 does not need to have a very large mass, which is convenient for operation and saves materials. The other fixture component is mounted on the first end of the mounting rod 21. The two fixture components are located in the same horizontal plane and are respectively used to clamp the upper and lower ends of the material to be tested. Further, in this embodiment, each fixture component includes a clamp body 31 and a pair of chuck members. The two clamp bodies 31 are respectively rotatably mounted on the first end of the mounting rod 21 and the bottom end of the first support frame 23. Each chuck member includes a threaded rod 32, an I-shaped push rod 33, a second telescopic spring 34, and a clamping block 35. A clamping space is formed between the two clamping blocks 35. The threaded rod 32 is horizontally threadedly mounted on the clamp body 31. The inside of the clamping block 35 is provided with a horizontal sliding hole, and a second horizontal sliding groove 36 and a third horizontal sliding groove 37 that are respectively communicated with both ends of the horizontal sliding hole. The I-shaped push rod 33 is slidably mounted in the horizontal sliding hole. The first end of the I-shaped push rod 33 is located in the second horizontal sliding groove 36 and the second end is located in the third horizontal sliding groove 37. The mutually approaching ends of the two threaded rods 32 both pass through the clamp body 31 and are respectively fixedly connected to the first ends of the two I-shaped push rods 33. Convenient-to-rotate handles are fixedly installed at the mutually remote ends of the two threaded rods 32. The second telescopic spring 34 is located in the second horizontal sliding groove 36 and is sleeved on the I-shaped push rod 33. The diameter of the first end of the I-shaped push rod 33 is greater than the diameter of the second telescopic spring 34, and the diameter of the second end of the I-shaped push rod 33 is greater than the diameter of the horizontal sliding hole. By placing the material to be tested into the clamping space formed by the two clamping blocks 35, and then holding the two handles to synchronously rotate the two threaded rods 32, the first end of each I-shaped push rod 33 will exert a thrust on the second telescopic spring 34, so that the two clamping blocks 35 approach each other and contact the material to be tested. Continuing to rotate the threaded rod 32, the second telescopic spring 34 located in the second horizontal sliding groove 36 will be gradually compressed by the first end of the I-shaped push rod 33, and the second end of the I-shaped push rod 33 will gradually approach the inner bottom wall of the third horizontal sliding groove 37 until they abut. At this time, the material to be tested is clamped, and a certain amount of elastic potential energy is stored in the second telescopic spring 34. When the material to be tested is stretched, its clamped volume will gradually decrease. At this time, the elastic potential energy in the second telescopic spring 34 is gradually released, the second end of the I-shaped push rod 33 gradually moves away from the inner bottom wall of the third horizontal sliding groove 37, and the clamping space between the two clamping blocks 35 will continue to become smaller, so as to maintain the clamping effect on the material to be tested and prevent the material from falling off due to the decrease in the clamped volume of the material to be tested after being stretched.Further, the plurality of clamping blocks 35 are all T-shaped. One end of the two clamping blocks 35 in each chuck component that are close to each other is a T-shaped head. The T-shaped design can increase the contact area of the clamping position while reducing the material proportion of other unnecessary positions, that is, it enhances the clamping force and saves materials.
[0048] Referring Figure 7 and Figure 8 As shown, in the tensile preparation state after the start of the high-temperature creep test device, the upper end of the pressure plate 14 abuts against the second end of the mounting rod 21. The slider 12 is fixedly connected to the first telescopic spring 13, and the first telescopic spring 13 applies a force to the slider 12 to make the slider 12 have a tendency to move. The upper end of the swing rod 17 extends into the bayonet 15 (a through hole for the swing rod 17 is provided at the upper end of the spring box 41) and abuts against the slider 12 to block the movement of the slider 12. The surface of the disc 16 supports the convex column 18. Exemplarily, the first telescopic spring 13 is in a stretched state, and the slider 12 is located at the first end (the end close to the pressure plate 14) of the first horizontal sliding groove. The two ends of the first telescopic spring 13 are respectively fixedly connected to the slider 12 and the second end of the first horizontal sliding groove. Under the elastic potential energy of the first telescopic spring 13, the slider 12 has a tendency to move towards the second end of the first horizontal sliding groove. The upper end of the swing rod 17 just extends into the bayonet 15 and abuts against the surface of the slider 12 connected to the first telescopic spring 13 to block the movement of the slider 12. Therefore, the upper end of the pressure plate 14 can abut against the second end of the mounting rod 21 to prevent the high-temperature creep test device from entering the tensile state. Exemplarily, the first telescopic spring 13 can also be in a compressed state. At this time, the slider 12 is located at the second end of the first horizontal sliding groove. The two ends of the first telescopic spring 13 are respectively connected to the slider 12 and the first end of the first horizontal sliding groove. Under the elastic potential energy of the first telescopic spring 13, the slider 12 has a tendency to move towards the first end of the first horizontal sliding groove. The upper end of the swing rod 17 abuts against the other surface of the slider 12 (the surface away from the first telescopic spring 13); similarly, when the first telescopic spring 13 is in a stretched state, the slider 12 can also be located at the second end of the first horizontal sliding groove. The two ends of the first telescopic spring are respectively fixedly connected to the slider 12 and the first end of the first horizontal sliding groove. The upper end of the swing rod 17 abuts against the surface of the slider 12 connected to the first telescopic spring 13; when the first telescopic spring 13 is in a compressed state, the slider 12 can also be located at the first end of the first horizontal sliding groove. The two ends of the first telescopic spring are respectively fixedly connected to the slider 12 and the second end of the first horizontal sliding groove. The upper end of the swing rod 17 abuts against the other surface of the slider 12.
[0049] When the convex post 18 falls into the notch 19, the high-temperature creep test device enters the tensile state. At this time, the swing rod 17 will rotate downward around the second horizontal rotating shaft, so that the upper end of the swing rod 17 disengages from the bayonet 15. Without the pressing of the swing rod 17, the first telescopic spring 13 quickly recovers its elastic deformation and drives the slider 12 to move towards the other end of the horizontal chute. At the same time, the slider 12 will drive the pressing plate 14 to move together. As the pressing plate 14 moves (the upper end of the pressing plate 14 is in sliding contact with the second end of the mounting rod 21), finally the upper end of the pressing plate 14 slides out from below the mounting rod 21, canceling the pressing on the second end of the mounting rod 21.
[0050] In summary, by arranging the counterweight 22 on the side of the mounting rod 21 close to the second support frame 24, the gravity of the counterweight 22 and the lever principle can cause the mounting rod 21 to have a tendency to rotate around the first horizontal rotating shaft. In the tensile preparation state after the high-temperature creep test device is started, the upper end of the pressing plate 14 abuts against the second end of the mounting rod 21. The first telescopic spring 13 fixedly connected to the slider 12 applies a force to the slider 12 to make the slider 12 have a tendency to move. The upper end of the swing rod 17 extends into the bayonet 15 and abuts against the slider 12 to block the movement of the slider 12. The surface of the disc 16 supports the convex post 18. Therefore, the stretching mechanism 2 will not start stretching immediately. As the clockwork power component 4 drives the rotation of the disc 16, when the disc 16 rotates to the position where the convex post 18 falls into the notch 19, the upper end of the swing rod 17 disengages from the bayonet 15, and the slider 12 starts to move under the action of the first telescopic spring 13. Finally, the upper end of the pressing plate 14 cancels the pressing on the second end of the mounting rod 21, and the mounting rod 21 rotates, and the two fixture components will move away from each other, so as to stretch the test material to be clamped. Before using the device, configure the stretching mechanism 2 and place the test material to be tested. Then turn the clockwork to start the device, and then close the environmental chamber. The device will automatically start stretching the test material after a delay period, without opening the environmental chamber again, solving the problem that the traditional tensile creep test device cannot set a delay trigger, ensuring that the properties of the polymer material are not affected, and improving the accuracy of the test results.
[0051] Furthermore, by placing the material to be tested into the clamping space formed by the two clamping blocks 35, and then holding the two handles and synchronously rotating the two threaded rods 32, the first end of each I-shaped push rod 33 will generate a thrust on the second telescopic spring 34, so that the two clamping blocks 35 approach each other and contact the material to be tested, and continue to rotate the threaded rod 32, the second telescopic spring 34 located in the second horizontal slide groove 36 will be gradually compressed by the first end of the I-shaped push rod 33, and the second end of the I-shaped push rod 33 gradually approaches the inner bottom wall of the third horizontal slide groove 37 until it abuts against each other. At this time, the material to be tested is clamped, and a certain amount of elastic potential energy is stored in the second telescopic spring 34. When the material to be tested is stretched, its clamped volume will gradually decrease. At this time, the elastic potential energy in the second telescopic spring 34 is gradually released, and the second end of the I-shaped push rod 33 gradually moves away from the inner bottom wall of the third horizontal slide groove 37. The clamping space between the two clamping blocks 35 will continue to become smaller, thereby maintaining the clamping effect on the material to be tested and preventing the material to be tested from falling off due to the reduction in the clamped volume after stretching.
[0052] Furthermore, the magnitude of the power can be adjusted by selecting counterweights 22 of different masses, and the length of the power arm can be steplessly adjusted by sliding the counterweight 22 at any distance on the mounting rod 21 and then fixing it with a locking nut 25, thereby increasing the flexibility of the test.
[0053] Furthermore, the high-temperature creep test device is composed of a purely mechanical structure, does not require any electric power source, has a simple structure, and is reliable in operation. It is suitable for creep tests in harsh environments such as high temperatures, avoids the risk of failure of electronic components in high temperature environments, reduces equipment costs and maintenance costs, and improves the practicability and popularity of the equipment.
[0054] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.
[0055] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.
Claims
1. A high-temperature creep test device capable of delaying stretching, characterized in that Comprising: A support assembly, which includes a first support frame (23) and a second support frame (24) arranged vertically; A stretching mechanism (2), which includes a mounting rod (21) and a counterweight (22). The mounting rod (21) is rotatably connected to the top end of the first support frame (23) through a first horizontal rotating shaft, and the counterweight (22) is arranged on one side of the mounting rod (21) close to the second support frame (24); A delay trigger mechanism (1), which includes a supporting block (11), a slider (12), a first telescopic spring (13), a pressing plate (14), a disc (16), and a swing rod (17) arranged obliquely. The supporting block (11) is fixedly installed at the top end of the second support frame (24). A first horizontal chute is provided on the side wall of the supporting block (11). The slider (12) is slidably installed in the first horizontal chute. The two ends of the first telescopic spring (13) are respectively fixedly connected to the end wall of the first horizontal chute and the slider (12). The lower end of the pressing plate (14) is rotatably connected to the slider (12). A bayonet (15) is provided on the bottom wall of the first horizontal chute. The lower end of the swing rod (17) is rotatably installed on the second support frame (24) through a second horizontal rotating shaft. The disc (16) is rotatably installed on the second support frame (24) through a third horizontal rotating shaft. Both the second horizontal rotating shaft and the third horizontal rotating shaft are perpendicular to the first horizontal rotating shaft. A convex column (18) is provided on the swing rod (17), and a notch (19) matching the convex column (18) is provided on the disc (16); A spring power assembly (4), which is used to drive the disc (16) to rotate; A clamping mechanism (3), which includes a pair of fixture assemblies. One fixture assembly is installed at the bottom end of the first support frame (23), and the other fixture assembly is installed at the first end of the mounting rod (21). The two fixture assemblies are respectively used to clamp the upper end and the lower end of the material to be tested; In the stretching preparation state after the start of the high-temperature creep test device, the upper end of the pressing plate (14) abuts against the second end of the mounting rod (21). The first telescopic spring (13) fixedly connected to the slider (12) exerts a force on the slider (12) to make the slider (12) have a tendency to move. The upper end of the swing rod (17) extends into the bayonet (15) and abuts against the slider (12) to block the movement of the slider (12). The surface of the disc (16) supports the convex column (18).
2. The high-temperature creep test device capable of delaying stretching according to claim 1, wherein Each fixture assembly includes: The clamping body (31) and a pair of chuck components. The two clamping bodies (31) are respectively rotatably installed on the mounting rod (21) and the first support frame (23). Each chuck component includes a threaded rod (32), an I-shaped push rod (33), a second telescopic spring (34), and a clamping block (35). The threaded rod (32) is horizontally threadedly installed on the clamping body (31). The inside of the clamping block (35) is provided with a horizontal sliding hole, a second horizontal sliding groove (36), and a third horizontal sliding groove (37) that are respectively communicated with both ends of the horizontal sliding hole. The I-shaped push rod (33) is slidably installed in the horizontal sliding hole. The first end of the I-shaped push rod (33) is located in the second horizontal sliding groove (36), and the second end is located in the third horizontal sliding groove (37). One ends of the two threaded rods (32) close to each other pass through the clamping body (31) and are respectively fixedly connected to the first ends of the two I-shaped push rods (33). The second telescopic spring (34) is located in the second horizontal sliding groove (36) and sleeved on the I-shaped push rod (33). The diameter of the first end of the I-shaped push rod (33) is larger than the diameter of the second telescopic spring (34). The diameter of the second end of the I-shaped push rod (33) is larger than the diameter of the horizontal sliding hole.
3. The high-temperature creep test device capable of delaying stretching according to claim 1, characterized in that, The clockwork power assembly (4) includes: A clockwork box (41), a clockwork gear (42), and a driven spur gear (43). The clockwork box (41) is fixedly installed on the second support frame (24). The clockwork gear (42) and the driven spur gear (43) are both rotatably installed on the inner wall of the clockwork box (41). The clockwork gear (42) is coaxially fixed with a clockwork key. The driven spur gear (43) is coaxially fixed with the disc (16). The clockwork gear (42) is a double-layer spur gear, and its smaller-radius spur gear meshes with the driven spur gear (43). The rotation of the clockwork gear (42) provides power through the energy stored when turning the clockwork key.
4. The high-temperature creep test device capable of delaying stretching according to claim 3, characterized in that, The clockwork power assembly (4) further includes: A first reduction wheel (44) and a second reduction wheel (45) rotatably installed on the inner wall of the clockwork box (41). The first reduction wheel (44) is a double-layer spur gear, and its smaller-radius spur gear meshes with the larger-radius spur gear of the clockwork gear (42). The second reduction wheel (45) is a double-layer spur gear, and its smaller-radius spur gear meshes with the larger-radius spur gear of the first reduction wheel (44).
5. The high-temperature creep test device capable of delaying stretching according to claim 4, wherein The clockwork power assembly (4) further includes: A hairspring balance wheel (46), an escapement fork (47), and an escapement wheel (48) rotatably installed on the inner wall of the clockwork box (41). The escapement fork (47) is Y-shaped. The escapement wheel (48) is a double-layer wheel, and its smaller-radius spur gear meshes with the larger-radius spur gear of the second reduction wheel (45), and its larger-radius ratchet wheel meshes with the two Y-shaped ends of the escapement fork (47).
6. The high-temperature creep test device capable of delaying stretching according to claim 1, characterized in that, The supporting block (11) is provided with a telescopic rod (20) for limiting the maximum displacement distance of the pressing plate (14). The first end of the telescopic rod (20)(22) is rotatably installed on the pressing plate (14), and the second end is rotatably installed on the supporting block (11).
7. The high-temperature creep test device capable of delaying stretching according to claim 1, wherein, The mounting rod (21) is a slide rail, and the counterweight (22) is slidably mounted on the mounting rod (21). A locking nut (25) is threadedly mounted on the top of the counterweight (22). The bottom end of the locking nut (25) is fixedly connected with a friction block, and the mounting rod (21) is located on the moving track of the friction block.
8. The high-temperature creep test device capable of delaying stretching according to claim 1, wherein, A corresponding horizontal scale is provided on the mounting rod (21).
9. The high-temperature creep test device capable of delaying stretching according to claim 2, wherein The swing rod (17) includes a first rod portion and a second rod portion that are perpendicular to each other. The first rod portion is disposed at the upper end of the second rod portion. The lower end of the second rod portion is rotatably mounted on the second support frame (24) through a second horizontal rotating shaft. A convex column (18) is disposed on the second rod portion, and the first rod portion can extend into the bayonet (15) to abut against the slider (12).
10. The high-temperature creep test device capable of delaying stretching according to claim 2, characterized in that, The plurality of clamping blocks (35) are all T-shaped, and the mutually approaching ends of the two clamping blocks (35) in each chuck assembly are T-shaped heads.