High polymer material low-temperature environment simulation test equipment

Abstract

The utility model discloses high polymer material low-temperature environment simulation test equipment. The high polymer material low-temperature environment simulation test equipment comprises a box body, the sample box is arranged in the box body; the moving assembly comprises a clamping piece for taking the sample from the sample box and a moving piece for driving the clamping piece to move; the stretching assembly comprises a clamp for stretching a test piece and a driving piece for driving the clamp to move, and the clamp stretches the sample taken by the clamping piece; the force value detection piece is connected with the clamp; and the displacement detection piece is connected with the clamp. A plurality of groups of samples are arranged in the sample box, so that the pre-cooling time of the samples is controllable, the moving assembly takes out the required samples and conveys the samples to the stretching assembly, the stretching assembly performs a stretching test on the samples, a horizontal low-temperature stretching device is changed into a vertical low-temperature stretching device, and the experiment and the stretching state of the samples are more intuitively observed; the test accuracy is improved; an automatic program enables the test to be controllable and accurate, and human errors are reduced.

Description

Technical Field

[0001] This utility model relates to a cable tensile test structure, and more particularly to a low-temperature environment simulation test device for polymer materials. Background Technology

[0002] Low-temperature tensile testing is primarily used to assess the mechanical and physical properties of cable materials at low temperatures. For insulated cores and cable sheaths that cannot undergo low-temperature winding tests, low-temperature tensile testing should be used. Wind power system cables, also known as wind energy cables, include cables for blade lightning protection, generator winding cables, cables laid inside towers, cables from towers to transformer substations, and cables from transformer substations to step-up substations. These cables typically need to meet the low-temperature resistance requirements of special environments, and the quality of the material's low-temperature performance has a significant impact on the service life of wind energy cables. Based on the outer diameter of the wind energy cable, low-temperature tensile testing is mainly used to test the low-temperature performance of the materials.

[0003] The tester should measure the spacing between the marking lines, or use a test device that measures the displacement distance of the clamp. If the equipment and the sample are not pre-cooled when cooling in air, the cooling time should be no less than 4 hours; if the test equipment is pre-cooled but the sample is not, the cooling time can be shortened to 2 hours; if both the test equipment and the sample are pre-cooled for 4 hours, the cooling time after fixing each sample to the equipment should be no less than 30 minutes.

[0004] In summary, existing detection methods have the following drawbacks:

[0005] ① Currently, the main method is to visually observe whether the sample breaks, which has a time lag. That is, the equipment is paused only after the sample breaks, and the actual measured results are too high. In addition, the low temperature tensile device is placed horizontally, which is not convenient for observation. ② The test time varies greatly depending on the precooling time of the equipment and the precooling time of the sample, resulting in low efficiency. ③ The replacement of low temperature samples requires manual operation. Different operating techniques of the testers and different cooling rates of the low temperature chambers will introduce random errors into the test results. Moreover, if the replacement time is too long, the equipment may freeze and the next low temperature tensile test cannot be carried out. ④ Low temperature testing is a low temperature operation, and long-term operation carries the risk of frostbite. Summary of the Invention

[0006] This invention overcomes the shortcomings of the prior art and provides a low-temperature environment simulation testing device for polymer materials.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A low-temperature environment simulation testing device for polymer materials, comprising:

[0009] Box;

[0010] A sample box is disposed inside the box.

[0011] The moving assembly includes a clamping member for removing a sample from the sample box and a moving member for driving the clamping member to move.

[0012] A tensile assembly includes a clamp holding a tensile test specimen and a drive member that moves the clamp, the clamp stretching the specimen held by the clamp.

[0013] A force detection component is connected to the fixture;

[0014] The displacement detection element is connected to the fixture.

[0015] More specifically, the movable component is configured as a first electric telescopic rod, and the clamping component is configured on the first electric telescopic rod.

[0016] More specifically, the fixture includes an upper fixture and a lower fixture. The upper fixture holds one end of the sample, and the lower fixture holds the other end of the sample. The stretching direction of the upper fixture and the lower fixture is vertical.

[0017] More specifically, the driving component is configured as a second electric telescopic rod, and the lower clamp is configured on the second electric telescopic rod.

[0018] More specifically, the force detection element is mounted on the upper clamp.

[0019] More specifically, the displacement detection element is mounted on the lower clamp.

[0020] More specifically, a first control cylinder is provided on both the upper and lower clamps.

[0021] More specifically, the clamping member is configured as an experimental clamp, and a second control cylinder is provided on the experimental clamp.

[0022] More specifically, a control module is provided on the outside of the housing, and the control module is electrically connected to the testing equipment.

[0023] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0024] Multiple sets of samples are set in the sample box, so that the pre-cooling time of the samples is controllable, or the pre-cooling time of samples in the same group is the same. The moving component takes out the required sample and transports it to the tensile component. The tensile component performs tensile tests on the sample. The horizontal low temperature tensile device is changed to a vertical low temperature tensile device, making the observation of the experiment and the tensile state of the sample more intuitive and improving the accuracy of the test. The manual process is replaced by an automated program, making the test controllable and accurate and reducing human error. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 ;

[0028] Figure 3 This is a three-dimensional structural diagram of the movable component of this utility model;

[0029] Figure 4 This is a three-dimensional structural diagram of the tension component of this utility model;

[0030] Figure 5 This is a three-dimensional structural diagram of the upper clamp and the control cylinder of this utility model.

[0031] In the diagram: 1. Box body; 11. Upper fixing plate; 12. Lower fixing plate; 13. Left fixing plate; 14. Right fixing plate; 2. Sample box; 3. Moving assembly; 31. Clamping component; 32. First electric telescopic rod; 4. Tensioning assembly; 41. Upper clamp; 42. Lower clamp; 43. Second electric telescopic rod; 45. Control cylinder; 5. Force detection component; 6. Displacement detection component; 7. First control module; 8. Sample. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this utility model. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0034] It should be understood that the accompanying drawings are for illustrative purposes only.

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0036] A low-temperature environment simulation testing device for polymer materials, such as Figures 1-5 As shown, it includes a housing 1, a sample box 2, a moving component 3, a tensile component 4, a force detection component 5, and a displacement detection component 6. All components are housed inside the housing 1, which is enclosed. The interior of the housing 1 forms a relatively enclosed low-temperature testing space, providing a stable low-temperature testing environment for polymer material samples.

[0037] like Figure 1 , Figure 2 As shown, the sample box 2 is set inside the box 1 to hold the sample 8 to be tested. The number of sample 8 is set to multiple, and the cooling time of sample 8 is controlled as needed.

[0038] like Figure 1 , Figure 2 as well as Figure 3As shown, the moving component 3 includes a clamping member 31 for retrieving samples 8 from the sample box 2 and a moving member for driving the clamping member 31. The moving member drives the clamping member 31 to move closer to the sample box 2 and retrieves the required number of samples 8 from the sample box 2. The moving member is configured as a first electric telescopic rod 32, and the clamping member 31 is mounted on the first electric telescopic rod 32. The clamping member 31 is configured as a test clamp. When the first electric telescopic rod 32 operates, the test clamp moves closer to or away from the sample box 2 on the first electric telescopic rod 32. Of course, the moving member can also be configured as a screw, hydraulic cylinder, or other structure. After the test clamp clamps the sample 8, it moves closer to the tensile component 4 until the tensile component 4 clamps the sample. A second control cylinder is provided on the test clamp. The second control cylinder includes a fixed end and a moving end. The fixed end is fixed to one side of the test clamp, and the moving end is fixed to the other side of the test clamp. When the moving end moves closer to or away from the fixed end, the test clamp opens or clamps.

[0039] like Figure 1 , Figure 2 as well as Figure 4 As shown, the tensile assembly 4 includes a clamp for the tensile test specimen and a drive member for moving the clamp. The clamp stretches the specimen 8 held by the clamping member 31, and the drive member drives the clamp to move in a direction that is closer to or further away from each other to reset or stretch the specimen.

[0040] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, the fixture includes an upper clamp 41 and a lower clamp 42. The upper clamp 41 holds one end of the sample, and the lower clamp 42 holds the other end of the sample. The upper clamp 41 and the lower clamp 42 move away from each other to stretch the sample. The stretching direction of the upper clamp 41 and the lower clamp 42 is vertical, making the vertical tensile observation test and the tensile state of the sample 8 more intuitive and improving the accuracy of the test. Furthermore, both the upper clamp 41 and the lower clamp 42 are configured as clamps to stably hold the sample 8 for the tensile test. To automate the release or clamping of the clamps, a first control cylinder 45 is provided on both the upper clamp 41 and the lower clamp 42. The first control cylinder 45 includes a fixed end and a movable end. The fixed end is fixed to one side of the clamp, and the movable end is connected to the other side of the clamp. Of course, the movable end can also be fixed to the other side of the clamp. After receiving a signal, the movable end of the first control cylinder 45 moves closer to the fixed end, and the upper clamp 41 and the lower clamp 42 open. After both ends of the sample 8 are in place, the movable end moves away from the fixed end, and the upper clamp 41 and the lower clamp 42 clamp the sample for tensile testing.

[0041] like Figure 1 , Figure 2 as well as Figure 4 As shown, the driving component is a second electric telescopic rod 43, and the lower clamp 42 is mounted on the second electric telescopic rod 43. Alternatively, the driving component can be a screw, hydraulic cylinder, or similar structure. During the tensile test, the second electric telescopic rod 43 moves, driving the lower clamp 42 to move up and down to reset or stretch the specimen 8. Inside the housing 1 are an upper fixed plate 11, a lower fixed plate 12, a left fixed plate 13, and a right fixed plate 14. The upper clamp 41 is fixed to the upper fixed plate 11, and the second electric telescopic rod 43 is fixed to the lower fixed plate 12. When the lower clamp 42 resets, there is a specimen distance between the upper clamp 41 and the lower clamp 42, facilitating the clamping member 31 to be positioned between the upper clamp 41 and the lower clamp 42 when transporting the specimen 8. The specimen box 2 is fixed to the right fixed plate 14, and the first electric telescopic rod 32 is fixed to the left fixed plate 13.

[0042] like Figure 1 , Figure 2 as well as Figure 4 As shown, the force detection element 5 is connected to the fixture and is used to record the force value of the tensile specimen. In this scheme, the force detection element 5 is set as a high-precision force sensor, installed on the upper fixture 41, and is used to detect the tensile force borne by the specimen in real time during the tensile process. When the force sensor reading is zero, it indicates that the specimen has broken, and the tensile process is stopped. The force sensor is electrically connected to the control module 7. When the detected force data is zero, the control module 7 controls the lifting motor to stop running and records the displacement distance detected by the displacement detection element 6, and calculates the elongation at break at this time.

[0043] like Figure 1 , Figure 2 as well as Figure 4 As shown, the displacement detection element 6 is connected to the fixture and is used to record the displacement distance of the specimen during the tensile test. In this scheme, the displacement detection element 6 is set as a displacement sensor and installed on the lower fixture 42 to detect the displacement change of the lower fixture 42 in real time during the tensile process, that is, the tensile deformation of the specimen. The displacement sensor is also electrically connected to the control module 7 and transmits the detected displacement data to the control module 7 for processing and recording.

[0044] like Figure 1 , Figure 2As shown, to ensure automation, a control module 7 is installed on the outside of the housing 1. The control module 7 can be a programmable logic controller (PLC) or an industrial control computer, possessing data processing, logic control, and display functions. The control module 7 is electrically connected to the testing equipment, facilitating automated control. The control module 7 is electrically connected to the moving motor 32, the lifting motor 43, force sensors, and displacement sensors via wires, enabling motion control of the moving component 3 and the tensile component 4, as well as the acquisition, processing, and storage of force and displacement data. Simultaneously, the control module 7 can also be equipped with a display screen and operation buttons, allowing operators to easily set test parameters, start and stop the test process, and view test results.

[0045] In this solution, the working principle of the testing equipment is as follows:

[0046] Place the polymer material sample to be tested into the sample box 2 inside the chamber 1. Several samples 8 can be placed, but at least three can be placed. Three samples 8 form a group. After the samples 8 are placed, set the test sequence number on the control module 7. One sequence number is one sample 8. Then, set the chamber 1 to a suitable low temperature environment as needed. After the constant temperature time is reached, start the test.

[0047] The operator operates the control module 7, first activating the first electric telescopic rod 32, causing the clamping member 31 to extend towards the sample box 2 and move into the sample box 2. The second control cylinder on the clamping member 31 starts to move, so that after the clamping member 31 clamps a sample 8, the first electric telescopic rod 32 retracts, driving the clamping member 31 to move towards the upper clamp 41 and the lower clamp 42, and moving the sample 8 between the upper clamp 41 and the lower clamp 42 in the vertical direction.

[0048] The control module 7 starts the first control cylinder 45 on the upper clamp 41 and the lower clamp 42 to move. The movable end moves towards the fixed end, so that the upper clamp 41 and the lower clamp 42 open. After the two ends of the sample 8 are inserted into the upper clamp 41 and the lower clamp 42, the movable end of the first control cylinder 45 moves away from the fixed end and clamps the two ends of the sample 8 respectively.

[0049] The control module 7 activates the second electric telescopic rod 43, causing the lower clamp 42 to move downward, thereby stretching the sample 8. During the stretching process, the force sensor detects the tensile force on the sample in real time and transmits the force data to the control module 7. When the force sensor detects that the force value of the upper clamp 41 is zero, or when the test time set by the control module 7 is reached, the control module 7 controls the second electric telescopic rod 43 to stop moving and records the displacement of the lower clamp 42 detected by the displacement sensor at this time, i.e., the tensile deformation of the sample 8, in order to calculate the elongation at break.

[0050] Then, the force sensor is zeroed, the gauge length is set to a fixed value, the lower clamp 42 is reset, the control module 7 controls the movement of the moving motor 32, and the clamping member 31 moves towards the sample box 2, placing the completed sample into the sample box 2 and clamping the untested sample 8 in the sample box 2 for another test. A test group consists of three samples. If one of the three samples 8 breaks first, the test group is stopped and the next test group begins. If no breakage occurs in any of the three tests, the next test group also begins.

[0051] The control module 7 processes and analyzes the collected force and displacement data, and stores the test data in the memory for easy viewing and export by the operator.

[0052] Through the above methods, the low-temperature environment simulation testing equipment for polymer materials can accurately simulate the tensile properties of polymer materials under low-temperature conditions, providing reliable data support for the performance research and quality inspection of polymer materials. By automating the equipment, measurement errors caused by visual readings by operators are eliminated, and the contact between operators and low-temperature equipment is reduced during the test operation, which greatly improves the test efficiency.

[0053] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0054] 1) Eliminate operational defects: Change the horizontal low-temperature tensile device to a vertical low-temperature tensile device to make the observation of the experiment and the tensile state of the sample more intuitive and improve the accuracy of the test.

[0055] 2) Protect personal health and safety: The control module 7 is set with multiple sets of experimental numbers, which correspond to the test specimens 8 on the test clamps. Every three test specimens 8 are tested as a group, realizing automatic stretching and replacement of test specimens 8, reducing the risk of frostbite to experimental personnel when fixing test specimens for a long time in a low temperature environment and the risk of equipment damage from freezing.

[0056] 3) Improve test efficiency: The manual replacement of the specimen is changed to the automatic delivery of the specimen to the fixture through the clamping part 31 by the set program. The upper and lower clamps clamp the specimen 8 respectively, and the tensile test is started by the control module 7.

[0057] 4) Achieve automated testing: By detecting the movement distance of the lower clamp 42 through the displacement sensor and controlling the test time of the control module 7, human testing errors are reduced, and low-temperature tensile tests can be performed continuously. The test can be started manually with a single button.

[0058] Based on the preferred embodiments of this utility model described above, 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.

[0059] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0060] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0061] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A low-temperature environment simulation testing device for polymer materials, characterized in that: Including Box (1); The sample box (2) is disposed inside the box body (1); The moving assembly (3) includes a clamping member (31) for taking a sample from the sample box (2) and a moving member for driving the clamping member (31) to move. The moving assembly (3) is disposed inside the box (1). The tensile assembly (4) includes a clamp for holding a tensile specimen (8) and a drive for moving the clamp. The clamp holds the specimen (8) taken by the clamp (31). The tensile assembly (4) is disposed inside the housing (1). Force detection component (5) is connected to the fixture; The displacement detection component (6) is connected to the fixture.

2. The low-temperature environment simulation testing equipment for polymer materials according to claim 1, characterized in that: The movable component is configured as a first electric telescopic rod (32), and the clamping component (31) is disposed on the first electric telescopic rod (32).

3. The low-temperature environment simulation testing equipment for polymer materials according to claim 1, characterized in that: The fixture includes an upper fixture (41) and a lower fixture (42). The upper fixture (41) clamps one end of the sample (8), and the lower fixture (42) clamps the other end of the sample (8). The stretching direction of the upper fixture (41) and the lower fixture (42) is vertical.

4. The low-temperature environment simulation testing equipment for polymer materials according to claim 3, characterized in that: The driving component is configured as a second electric telescopic rod (43), and the lower clamp (42) is mounted on the second electric telescopic rod (43).

5. The low-temperature environment simulation testing equipment for polymer materials according to claim 3, characterized in that: The force detection component (5) is mounted on the upper clamp (41).

6. The low-temperature environment simulation testing equipment for polymer materials according to claim 3, characterized in that: The displacement detection element (6) is mounted on the lower clamp (42).

7. The low-temperature environment simulation testing equipment for polymer materials according to claim 3, characterized in that: A first control cylinder (45) is provided on both the upper clamp (41) and the lower clamp (42).

8. The low-temperature environment simulation testing equipment for polymer materials according to claim 1, characterized in that: The clamping member (31) is configured as an experimental clamp, and a second control cylinder is provided on the experimental clamp.

9. The low-temperature environment simulation testing equipment for polymer materials according to claim 8, characterized in that: A control module (7) is provided on the outside of the housing (1), and the control module (7) is electrically connected to the test equipment.

10. The low-temperature environment simulation testing equipment for polymer materials according to claim 1, characterized in that: The force detection element (5) is configured as a force sensor, and the displacement detection element (6) is configured as a displacement sensor.

Images