Thermal extension testing device

Abstract

The utility model relates to the technical field of thermal extension testing equipment, and provides a thermal extension testing device, which comprises a drying oven, at least one clamp, a loading piece and a range finder, the drying oven comprises an oven body and an oven door, the oven door is detachably arranged in the oven body, the clamp is arranged in the oven body and is used for clamping one end of a sample, and the loading piece is used for loading the sample. The loading piece is arranged in the box body in a suspended mode and used for stretching the other end of the sample, and the range finder is located in the box body and used for measuring the length of the sample. Wherein the range finder can directly measure the extension length of the sample in the drying oven, and a user does not need to take the sample out of the drying oven and then manually measure the sample, so that automatic measurement of the extension length of the sample is realized, and the accuracy and precision of the thermal extension test are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of heat elongation test equipment, in particular to a heat elongation test device. Background Art

[0002] Heat elongation test is a method for testing the mechanical properties of materials, used to evaluate the elongation performance of materials under high-temperature conditions. The heat elongation rate is an important index for material detection. In the heat elongation test, the material is placed in a certain temperature environment for stretching, and then the load and deformation during the stretching process are measured.

[0003] In the prior art, mostly the initial length of the material sample is recorded in advance, and then the material sample is placed in an oven, and the temperature of the oven is set to the temperature required for the test. After the test is completed, the heat elongation length of the material sample is measured manually. Combining with the initial length of the material sample, the heat elongation rate of the material is obtained through a calculation formula. This method relies on manual measurement, and the measurement error is large. Moreover, when the oven door is opened, gas convection occurs inside and outside the oven, resulting in a sharp drop in the temperature inside the oven. At this time, the material sample shrinks to a certain extent after being cooled, so that the heat elongation length measured manually does not conform to the actual situation, and it is difficult to ensure the accuracy of the heat elongation test. Content of the Utility Model

[0004] The utility model provides a heat elongation test device to solve the problem that the error of the heat elongation test on materials in the prior art is large and it is difficult to ensure the accuracy of the test results.

[0005] The utility model provides a heat elongation test device, including: an oven, a fixture, a loading member and a distance measuring device. The oven includes a box body and an oven door, and the oven door is detachably arranged on the box body. There is at least one fixture, and the fixture is installed inside the box body and used to clamp one end of the sample. The loading member is suspended inside the box body and used to stretch the other end of the sample. The distance measuring device is located inside the box body and used to measure the length of the sample.

[0006] According to a heat elongation test device provided by the utility model, it further includes a controller and a display screen. The controller and the display screen are both fixed on the outer wall of the box body. The distance measuring device and the display screen are both electrically connected to the controller, and the controller is electrically connected to the control unit of the oven;

[0007] And / or, the display screen is a touch screen.

[0008] According to a thermal elongation test device provided by the present utility model, it further includes a heat insulation box. The heat insulation box is fixed to the inner wall of the box body. The distance measuring device is fixed inside the heat insulation box. The heat insulation box has a first through hole for avoiding the distance measuring field of view of the distance measuring device, and the distance measuring end of the distance measuring device is located in the first through hole.

[0009] According to a thermal elongation test device provided by the present utility model, it further includes a camera. The camera is installed inside the heat insulation box. The heat insulation box has a second through hole for avoiding the shooting field of view of the camera. The camera is used to collect images of the thermal elongation change of the sample, and the camera is electrically connected to the controller.

[0010] According to a thermal elongation test device provided by the present utility model, the heat insulation box is a ceramic fiber box.

[0011] According to a thermal elongation test device provided by the present utility model, it further includes a wire. The two ends of the wire are respectively provided with a first electrical plug and a second electrical plug. The controller and the distance measuring device are respectively provided with a first electrical jack and a second electrical jack. The box body is provided with a wire passing hole. The wire is passed through the wire passing hole. The first electrical plug is inserted into the first electrical jack, and the second electrical plug is inserted into the second electrical jack.

[0012] According to a thermal elongation test device provided by the present utility model, it further includes a specimen holder. The specimen holder is installed inside the box body. The fixture is fixed to the specimen holder. The distance measuring device is fixed to the fixture or the specimen holder.

[0013] According to a thermal elongation test device provided by the present utility model, it further includes a clamping member. The clamping member is used to clamp one end of the sample away from the fixture. A hook for hooking the loading member is provided on the side of the clamping member facing away from the sample.

[0014] According to a thermal elongation test device provided by the present utility model, the oven door has a transparent window.

[0015] According to a thermal elongation test device provided by the present utility model, the distance measuring device is a high-temperature infrared distance measuring sensor or a high-temperature laser distance measuring sensor.

[0016] The present utility model provides a heat elongation test device. The oven includes a box body and an oven door. The oven door is detachably arranged on the box body so that the user can place the sample in the oven. There is at least one fixture, which is installed in the box body and used to clamp one end of the sample to prevent the sample from shifting during the test and ensure the stability of the sample during the heating process. The loading member is suspended in the box body, and the other end of the sample is stretched by the loading member in a high-temperature environment to realize the heating and stretching of the sample. The rangefinder is located in the box body and used to measure the elongation length of the sample. The user does not need to take the sample out of the oven and manually measure the elongation length of the sample, realizing the automatic measurement of the elongation length of the sample and ensuring the accuracy and precision of the heat elongation test. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of a heat elongation test device corresponding to an embodiment provided by the present utility model.

[0019] Figure 2 It is a schematic structural diagram of a heat elongation test device corresponding to another embodiment provided by the present utility model.

[0020] Reference Signs:

[0021] 1. Oven; 11. Box body; 12. Oven door; 2. Fixture; 3. Loading member; 4. Rangefinder; 5. Display screen; 6. Heat insulation box; 7. Camera; 8. Wire; 9. Specimen rack; 10. Clamping member; 101. Hook; 100. Sample. Detailed Embodiments

[0022] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will clearly and completely describe the technical solutions in the present utility model with reference to the drawings in the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present utility model belong to the scope of protection of the present utility model.

[0023] The features of the terms "first" and "second" in the description and claims of the present utility model may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] The following Figure 1 - Figure 2 will, through specific embodiments and their application scenarios, provide a detailed description of a thermal elongation test device provided by an embodiment of the present utility model.

[0027] As Figure 1 and Figure 2 shown, the present utility model provides a thermal elongation test device, including: an oven 1, a fixture 2, a loading member 3, and a distance measuring device 4. The oven 1 includes a box body 11 and an oven door 12. The oven door 12 is detachably provided on the box body 11. There is at least one fixture 2. The fixture 2 is installed in the box body 11 and is used to clamp one end of the sample 100. The loading member 3 is suspended in the box body 11 and is used to stretch the other end of the sample 100. The distance measuring device 4 is located in the box body 11 and is used to measure the length of the sample 100.

[0028] It is understandable that the sample 100 for the heat elongation test can be a cross-linked material, metal, carbon fiber composite material, polymer material, etc. The oven door 12 is detachably provided on the box body 11. Optionally, one side edge of the oven door 12 and one side edge of the box body 11 can be connected by a hinge. The other side edge of the oven door 12 and the other side edge of the box body 11 can be magnetically attracted by a magnetic attraction structure.

[0029] The fixture 2 is fixed on the inner wall of the box body 11 and is used to clamp one end of the sample 100 to prevent the sample 100 from moving or deforming during the test. Multiple fixtures 2 can be provided, and each fixture 2 clamps one sample 100 to enable multiple samples 100 to be simultaneously subjected to the heat elongation test, improving the test efficiency of the heat elongation test device. Further, the loading member 3 is suspended at the other end of the sample 100. Under the action of the self-gravity of the loading member 3, the sample 100 is stretched in a high-temperature environment, thereby realizing the heat elongation test of the sample 100. Optionally, the loading member 3 can be a mass weight. The user can reasonably select the number of mass weights hung at the other end of the sample 100 according to the actual loading requirements.

[0030] As Figure 1 and Figure 2 shown, the rangefinder 4 is installed inside the box body 11. The rangefinder 4 is an electronic component for measuring distance or length. The sample 100 is in the high-temperature oven 1. As the loading member 3 pulls, the length of the sample 100 gradually becomes longer. The rangefinder 4 is used to measure the elongation length of the sample 100 after being heated in the oven 1. After the rangefinder 4 measures the elongation length of the sample 100, combined with the initial length of the sample 100, the elongation rate of the sample 100 can be obtained.

[0031] Optionally, the rangefinder 4 is a high-temperature infrared rangefinder sensor or a high-temperature laser rangefinder sensor.

[0032] The high-temperature infrared rangefinder sensor is a sensor for measuring the distance of a high-temperature target. An infrared emitter is installed inside the high-temperature infrared rangefinder sensor. The infrared emitter emits an infrared light beam towards the sample 100, and the sample 100 reflects part of the infrared light beam back to be received by the receiver of the high-temperature infrared rangefinder sensor. The high-temperature infrared rangefinder sensor can calculate the round-trip time of the light beam by measuring the time required from emission to reception of the reflected light beam, thereby obtaining the distance between the sample 100 and the sensor.

[0033] In addition, the high-temperature infrared rangefinder sensor can work normally in a high-temperature environment. Its internal electronic components and housing materials have high heat-resistant properties and are suitable for measuring the distance of the sample 100 in the high-temperature environment of the oven 1.

[0034] The high-temperature laser distance sensor is also a sensor specifically used for distance measurement in high-temperature environments. Compared with conventional optoelectronic sensors, the high-temperature laser distance sensor has higher temperature resistance performance and accuracy, and is suitable for precise distance measurement under the high-temperature conditions of the oven 1.

[0035] The high-temperature laser distance sensor has a laser emitter inside. The laser emitter emits a laser beam towards the sample 100, and the sample 100 reflects part of the laser beam back to be received by the receiver of the high-temperature laser distance sensor. The high-temperature laser distance sensor can calculate the round-trip time of the light beam, that is, the distance between the sample 100 and the sensor, by measuring the time required from emission to reception of the reflected light beam.

[0036] The present utility model provides a thermal elongation test device. The oven 1 includes a box body 11 and an oven door 12. The oven door 12 is detachably arranged on the box body 11 so that the user can place the sample 100 inside the oven 1; there is at least one fixture 2, and the fixture 2 is installed inside the box body 11 to clamp one end of the sample 100 to prevent the sample 100 from shifting during the test and ensure the stability of the sample 100 during the heating process. The loading member 3 is suspended inside the box body 11, and the other end of the sample 100 is stretched by the loading member 3 under high-temperature environment to realize the heating and stretching of the sample 100; the distance measurer 4 is located inside the box body 11 and is used to measure the elongation length of the sample 100. The user does not need to take the sample 100 out of the oven 1 and manually measure the elongation length of the sample 100, realizing the automatic measurement of the elongation length of the sample 100 and ensuring the accuracy and precision of the thermal elongation test.

[0037] As Figure 1 and Figure 2 shown, in some embodiments, the thermal elongation test device further includes a controller and a display screen 5. The controller and the display screen 5 are both fixed on the outer wall of the box body 11. The distance measurer 4 and the display screen 5 are both electrically connected to the controller, and the controller is electrically connected to the control unit of the oven 1.

[0038] It can be understood that the controller can be a printed circuit board (PCB) well-known in the art. The controller and the display screen 5 are both fixed on the outer wall of the box body 11 for the installation and maintenance of the controller and the display screen 5.

[0039] The distance measurer 4 is electrically connected to the controller to send the length change information of the sample 100 to the controller. The controller calculates the thermal elongation rate of the sample 100 according to the length change information of the sample 100 and sends the thermal elongation rate to the display screen 5 for display for the user to view.

[0040] Furthermore, the controller is electrically connected to the control unit of the oven 1 so that the controller can control parameters such as the temperature and heating duration of the oven 1, facilitating user operation.

[0041] The controller has a communication function. The controller can send the measurement information of the distance measurer 4 to the mobile terminal or the client for the user to view.

[0042] Preferably, the display screen 5 is a touch screen. The user can input parameter instructions such as the temperature of the oven 1 and the heating duration of the sample 100 to the controller through the touch screen, so that the controller can send the parameter instructions to the control unit of the oven 1, and further enable the control unit of the oven 1 to control the working states of the various components of the oven 1. Thus, the user does not need to frequently operate the temperature button or duration button of the oven 1, and the distance measurement function and temperature adjustment function of the entire device are integrated, improving the convenience of user operation.

[0043] In some embodiments, as Figure 2 shown, the thermal elongation test device further includes a heat insulation box 6. The heat insulation box 6 is fixed to the inner wall of the box body 11. The distance measurer 4 is fixed inside the heat insulation box 6. The heat insulation box 6 has a first through hole for avoiding the distance measurement field of view of the distance measurer 4, and the distance measurement end of the distance measurer 4 is located in the first through hole.

[0044] It can be understood that during the thermal elongation test of the sample 100, generally, the temperature inside the oven 1 needs to be set relatively high. The distance measurer 4 belongs to an electronic device and is prone to damage in a high-temperature environment for a long time. The high-temperature environment may also cause the measurement accuracy of the distance measurer 4 to decrease.

[0045] As Figure 2 shown, the heat insulation box 6 is arranged inside the box body 11. The heat insulation box 6 has excellent heat insulation and heat isolation effects. The heat insulation box 6 is fixed to the inner wall of the box body 11 and is on the same side as the display screen 5. The distance measurer 4 is installed inside the heat insulation box 6. A large amount of high temperature is isolated by the heat insulation box 6, enabling the distance measurer 4 to operate normally, ensuring the working durability of the distance measurer 4, and guaranteeing the accuracy of the distance measurer 4.

[0046] In addition, to ensure that the heat insulation box 6 does not block the measurement field of view of the distance measurer 4, a first through hole is provided on the heat insulation box 6. The measurement end of the distance measurer 4 is arranged in the first through hole so that the measurement field of view of the distance measurer 4 can penetrate through the heat insulation box 6.

[0047] During installation, first install the heat insulation box 6 beside the sample 100 to ensure that the distance measurer 4 has a better measurement position, and then install the distance measurer 4 in the vicinity of the first through hole and make the distance measurement end of the distance measurer 4 located in the first through hole.

[0048] Furthermore, as Figure 2As shown, the thermal extension test device further includes a camera 7. The camera 7 is installed inside the thermal insulation box 6. The thermal insulation box 6 has a second through hole to avoid the shooting field of the camera 7. The camera 7 is used to collect images of thermal extension changes of the sample 100. The camera 7 is electrically connected to the controller.

[0049] It is understandable that the camera 7 is used to capture the thermal elongation change image of the sample 100 during the test. The camera 7 is installed in the thermal insulation box 6, and the thermal insulation box 6 is used to prevent the camera 7 from being damaged by the high temperature environment. The camera 7 is electrically connected to the controller to send image information to the controller. The controller is electrically connected to the display screen 5, and can feed back the thermal elongation change image of the sample 100 to the display screen 5 for display, so that the user can understand the entire change process of the thermal elongation test of the sample 100 in real time.

[0050] In addition, in order to ensure that the insulation box 6 does not block the measurement field of view of the camera 7, a second through hole is provided on the insulation box 6. The shooting end of the camera 7 is located at the second through hole, so that the shooting field of the camera 7 can pass through the insulation box 6.

[0051] During installation, the temperature-isolating box 6 is first installed beside the sample 100 to ensure that the sample 100 is within the shooting range of the camera 7. Then the camera 7 is installed in the vicinity of the second through hole, and the shooting end of the camera 7 is located in the first through hole.

[0052] Preferably, the insulation box 6 is a ceramic fiber box.

[0053] It is understandable that the ceramic fiber has excellent high temperature resistance and heat insulation performance, is not easy to melt or deform in a high temperature environment, and can effectively isolate the high temperature in the oven 1, prevent heat from being conducted or radiated into the ceramic fiber box, and protect the rangefinder 4 and the camera 7 and other components from being affected by high temperature. In addition, the material of the ceramic fiber box is very light, easy to install and disassemble, and will not add too much additional load to the oven 1.

[0054] Specifically, if Figure 1 and Figure 2 As shown, the thermal extension test device also includes a wire 8. The two ends of the wire 8 are respectively provided with a first electrical plug and a second electrical plug. The controller and the range finder 4 are respectively provided with a first electrical socket and a second electrical socket. The box 11 is provided with a threading hole, the wire 8 is passed through the threading hole, the first electrical plug is plugged into the first electrical socket, and the second electrical plug is plugged into the second electrical socket.

[0055] It is understandable that the wire 8 is electrically plugged into the rangefinder 4 and the controller respectively, which is convenient for assembly and disassembly. Specifically, the first electrical plug and the second electrical plug are respectively arranged at the two ends of the wire 8. Correspondingly, the controller is provided with a first electrical socket. The first electrical socket is adapted to the first electrical plug. The rangefinder 4 is provided with a second electrical socket. The second electrical socket is adapted to the second electrical plug.

[0056] The box body 11 is provided with a wire passing hole for the wire 8 to pass through. During assembly, inserting the first electrical plug into the first electrical jack and inserting the second electrical plug into the second electrical jack can achieve the electrical connection between the controller and the distance measuring device 4.

[0057] In some embodiments, as Figure 1 and Figure 2 shown, the thermal elongation test device further includes a specimen holder 9. The specimen holder 9 is installed inside the box body 11, the fixture 2 is fixed to the specimen holder 9, and the distance measuring device 4 is fixed to the fixture 2 or the specimen holder 9.

[0058] It can be understood that the specimen holder 9 can provide support for the fixture 2, facilitate the fixation of the fixture 2 and the placement of the sample 100, and ensure that the sample 100 can smoothly perform the thermal elongation test.

[0059] In some embodiments, as Figure 1 shown, the distance measuring device 4 can be fixed on the fixture 2 or the specimen holder 9, as long as it can ensure that the measuring end of the distance measuring device 4 can directly measure both ends of the sample 100.

[0060] Specifically, the thermal elongation test device further includes a clamping member 10. The clamping member 10 is used to clamp one end of the sample 100 away from the fixture 2, and a hook 101 for hooking the loading member 3 is provided on the side of the clamping member 10 facing away from the sample 100.

[0061] It can be understood that the clamping member 10 is used to provide support for the loading member 3, facilitating the loading member 3 to pull the sample 100 in suspension. Optionally, the clamping member 10 includes a clip and a hook 101. The hook 101 is fixed to one end of the clip away from its clamping end. The clip is used to clamp the other end of the sample 100, and the hook 101 is used to hook the loading member 3 to ensure the normal progress of the thermal elongation test.

[0062] The oven door 12 has a transparent window so that users can directly see the entire thermal elongation change process of the sample 100, improving the convenience of the thermal elongation test device.

[0063] During use, open the oven door 12, clamp one end of the sample 100 through the fixture 2; then clamp the other end of the sample 100 through the clamping member 10 and hook the loading member 3 on the hook 101 of the clamping member 10. The weight of the loading member 3 can be increased or decreased according to the actual test situation. Immediately afterwards, close the oven door 12, start the thermal elongation test device, adjust the temperature of the oven 1 to the required temperature for the test, measure the distance of the sample 100 through the distance measuring device 4, and collect the thermal elongation change images of the sample 100 through the camera 7. The distance measuring device 4 transmits the measurement result to the controller, and the controller calculates the measurement result into a thermal elongation rate and feeds back the thermal elongation rate for display on the display screen 5 for users to view.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A hot elongation test device, characterized in that, include: An oven, a clamp, a loader and a distance meter, wherein the oven comprises a box body and an oven door, wherein the oven door is detachably arranged on the box body, the clamp has at least one, the clamp is installed in the box body and is used to clamp one end of the sample, the loader is suspended in the box body and is used to stretch the other end of the sample, and the distance meter is located in the box body and is used to measure the length of the sample.

2. The thermal elongation test device according to claim 1, characterized in that, It also includes a controller and a display screen, wherein the controller and the display screen are both fixed to the outer wall of the box body, the rangefinder and the display screen are both electrically connected to the controller, and the controller is electrically connected to a control unit of the oven; And / or, the display screen is a touch screen.

3. The thermal elongation test device according to claim 2, characterized in that, It also includes a thermal insulation box, which is fixed to the inner wall of the box body, and the rangefinder is fixed inside the thermal insulation box. The thermal insulation box has a first through hole to avoid the ranging field of the rangefinder, and the ranging end of the rangefinder is located in the first through hole.

4. The thermal elongation test device according to claim 3, characterized in that, It also includes a camera, which is installed inside the insulation box. The insulation box has a second through hole that avoids the camera's shooting field of view. The camera is used to collect images of the thermal extension changes of the sample. The camera is electrically connected to the controller.

5. The thermal elongation test device according to claim 3, characterized in that The thermal insulation box is a ceramic fiber box.

6. The thermal elongation test device according to claim 2, characterized in that, It also includes a wire, wherein the two ends of the wire are respectively provided with a first electric plug and a second electric plug, the controller and the rangefinder are respectively provided with a first electric socket and a second electric socket, the box body is provided with a wire threading hole, the wire is passed through the wire threading hole, the first electric plug is plugged into the first electric socket, and the second electric plug is plugged into the second electric socket.

7. The thermal elongation test device according to claim 1, wherein, It also includes a sample rack, which is installed in the box, the clamp is fixed to the sample rack, and the rangefinder is fixed to the clamp or the sample rack.

8. The thermal elongation test device according to claim 1, characterized in that, It also includes a clamping piece, which is used to clamp one end of the sample away from the clamp, and a hook for hooking the loading piece is provided on a side of the clamping piece away from the sample.

9. The hot elongation test device according to claim 1, characterized in that The oven door has a transparent window.

10. The hot elongation test device according to claim 1, characterized in that, The distance finder is a high-temperature infrared distance sensor or a high-temperature laser distance sensor.

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