Performance detection method for flame-retardant polyethylene material
By introducing accelerated aging treatment steps in the detection method of flame retardant polyethylene materials, the problem that traditional detection methods fail to consider performance changes caused by environmental factors in the long-term use of the material is solved, and a more comprehensive and accurate flame retardant performance evaluation is achieved.
Patent Information
- Application Number
- CN202411657522.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-02-25
AI Technical Summary
The traditional flame retardant performance detection method of flame retardant polyethylene materials does not fully consider the performance changes caused by environmental factors during long-term use of the materials, and the inspection content is not comprehensive enough.
A detection method including extrusion sample preparation, initial direct testing, aging treatment, aging retest and analysis summary is adopted. The sample is subjected to accelerate aging through the schema treatment device, simulate the use environment of flame-retardant polyethylene materials, and detect changes in its flame-retardant properties.
It can more comprehensively and accurately evaluate the flame retardant properties of flame retardant polyethylene materials, providing more powerful technical support for the research and development, production and application of materials.
Smart Images
Figure CN119510665A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a performance testing method, in particular to a flame retardant polyethylene material performance testing method applied in the technical field of material performance testing. Background Art
[0002] Flame retardant polyethylene material is a flame retardant material made by adding a certain amount of flame retardant to polyethylene resin, and then mixing, extruding, granulating and other processes. With the rapid development of industries such as electricity and communications, cables, as important carriers for transmitting electric energy and signals, are receiving more and more attention for their safety performance. Flame retardant polyethylene materials are widely used in the manufacture of cables due to their good flame retardant properties to improve the fire safety performance of cables.
[0003] In the field of cables, flame-retardant polyethylene materials are often used to make the sheath layer of cables. In order to ensure the safety of cables, it is necessary to test the flame-retardant properties of flame-retardant polyethylene materials. However, in the actual application of cables, the sheath layer, as the outermost layer in direct contact with the external environment, will be continuously affected by various environmental factors such as high temperature and ultraviolet radiation. These factors may cause the flame-retardant properties of flame-retardant polyethylene materials to gradually weaken over time, thus posing a potential threat to the overall safety performance of the cable.
[0004] Traditional flame retardant polyethylene material flame retardant performance testing methods usually only focus on the flame retardant performance of flame retardant polyethylene materials in their initial state, that is, the flame retardant performance of flame retardant polyethylene materials before they are put into use, and fail to fully consider the performance changes of flame retardant polyethylene materials caused by environmental factors during long-term use. They have great limitations and the testing content is not comprehensive enough. Therefore, we propose a flame retardant polyethylene material performance testing method. Summary of the invention
[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the traditional detection method has great limitations and the detection content is not comprehensive enough because it fails to fully consider the performance changes of flame-retardant polyethylene materials caused by environmental factors during long-term use.
[0006] In order to solve the above problems, the present invention provides a method for detecting the performance of a flame retardant polyethylene material, comprising the following steps: S1. Extrusion sampling: Take an appropriate amount of flame-retardant polyethylene material from the same batch and make it into a standard cylindrical flame-retardant polyethylene sheath layer by extrusion molding process. After the flame-retardant polyethylene sheath layer is cooled and solidified, two sample sections of the same length and uniform quality are cut from the flame-retardant polyethylene sheath layer and marked as sample A and sample B respectively; S2. Initial direct test: Use flame retardant performance testing equipment to test the flame retardant performance of sample A and record relevant test data; S3. Aging treatment: According to the expected use environment of the flame-retardant polyethylene material, the sample B is subjected to accelerated aging treatment by a simulated treatment device; S4. Aging retest: Use flame retardant performance testing equipment to test the flame retardant performance of sample B and record relevant test data; S5. Analysis and summary: Based on the test data of sample A, determine whether the flame retardant performance of the flame retardant polyethylene material is qualified, and analyze the change of the flame retardant performance of the flame retardant polyethylene material by comparing the test data of sample A and sample B; The virtual processing device includes a processing box, on the inner walls of the upper and lower ends of the processing box are respectively fixedly installed ultraviolet lamps and infrared lamps, and the side walls on the left and right sides of the processing box are respectively provided with connecting studs and a motor box, the connecting studs penetrate the side walls of the processing box and are threadedly connected thereto, the motor box is fixedly installed on the side walls of the processing box, a driving motor is fixedly installed in the motor box, the output end of the driving motor is fixedly connected with a square linkage square rod, the linkage square rod penetrates the side walls of the processing box and is movably connected thereto, a linkage support rod is movably arranged in the processing box, one end of the linkage support rod is rotatably connected to the connecting stud through a bearing, and the other end of the linkage support rod is provided with a linkage square groove matching the linkage square rod, and the linkage square rod is movably plugged into the linkage square groove.
[0007] In the above-mentioned flame-retardant polyethylene material performance testing method, not only the flame retardant performance of the flame-retardant polyethylene material before being put into use can be detected, but also the changes in the flame retardant performance of the flame-retardant polyethylene material after it is put into use can be detected, thereby more comprehensively and accurately evaluating the flame retardant performance of the flame-retardant polyethylene material, and providing strong technical support for the research and development, production and application of the material.
[0008] As a further improvement of the present application, a processing controller is fixedly installed on the processing box, and a parameter setting module and a processing control module are provided in the processing controller. The parameter setting module is signal-connected with the processing control module, and the processing control module is signal-connected with the ultraviolet lamp, the infrared lamp, and the driving motor. A control button is provided on the processing controller, and the control button is signal-connected with the processing control module. The inner diameter of the flame-retardant polyethylene sheath layer in step S1 matches the diameter of the rotating support rod, so that the simulated processing device can simulate the use environment of the flame-retardant polyethylene material when it is used to make the cable sheath layer, and perform accelerated aging treatment on sample B.
[0009] As a further improvement of the present application, the joint rotating support rod is composed of a left connecting rod body, a middle elastic rod body, and a right connecting rod body. The two ends of the middle elastic rod body are respectively fixedly connected to the left connecting rod body and the right connecting rod body. The left connecting rod body in the joint rotating support rod is rotatably connected to the connecting stud through a bearing, and the right connecting rod body in the joint rotating support rod is provided with a linkage square groove. The middle elastic rod body is made of elastic heat-insulating material.
[0010] As a further improvement of the present application, a horizontal electric telescopic rod is fixedly installed on the inner wall of the processing box, the output end of the horizontal electric telescopic rod is fixedly connected to a connecting seat, a vertical electric telescopic rod is fixedly installed on the connecting seat, the output end of the vertical electric telescopic rod is fixedly connected to a bending rod, and the processing control module is also connected to the horizontal electric telescopic rod and the vertical electric telescopic rod signal, so that the simulated processing device can also bend the sample B, thereby improving the comprehensiveness of the accelerated aging treatment.
[0011] As a further improvement of the present application, the flame retardant performance testing equipment in step S1 is one of an oxygen index tester and a horizontal and vertical combustion tester, and the flame retardant performance testing equipment used in step S2 is the same as the flame retardant performance testing equipment used in step S1.
[0012] As another improvement of the present application, a moving-tube electric telescopic rod is fixedly installed on the inner wall of the processing box, and a linkage rod is fixedly connected to the output end of the moving-tube electric telescopic rod. A light-shielding tube that is slidingly and sealingly connected to the right connecting rod body is sleeved on the outer wall of the light-shielding tube, and a connecting ring is sleeved on the outer wall of the light-shielding tube. The connecting ring is rotatably connected to the light-shielding tube through a bearing, the linkage rod is fixedly connected to the connecting ring, and the processing control module is also signal-connected to the moving-tube electric telescopic rod.
[0013] As another improvement supplement of the present application, the light-shielding tube is made of opaque heat-insulating material, the inner wall of the light-shielding tube, the outer wall of the light-shielding tube and the outer wall of the middle elastic rod are all coated with a heat-insulating coating, a supporting rod body is embedded through the middle part of the middle elastic rod body, and the two ends of the supporting rod body are respectively embedded in the left connecting rod body and the right connecting rod body, the supporting rod body is made of paraffin, and a plurality of light-transmitting blocks evenly distributed along a ring are embedded on the outer wall of the middle elastic rod body, the light-transmitting blocks are made of transparent plastic, and one end of the light-transmitting blocks is against the supporting rod body, so that the supporting rod body can play a supporting role for the middle elastic rod body, thereby preventing the middle elastic rod body from spontaneous bending and deformation.
[0014] As another improvement supplement of the present application, the inner wall of the light-shielding tube, the outer wall of the light-shielding tube and the outer wall of the intermediate elastic rod are all coated with a heat-insulating coating.
[0015] As another improvement supplement to the present application, the support rod body is configured to be square, and the upper and lower sides of the support rod body are fixedly connected with a plurality of rotating blocks embedded in the middle elastic rod body. The material of the rotating blocks is the same as that of the support rod body, which is conducive to the rotation of the middle elastic rod body and prevents the middle elastic rod body from twisting when the driving motor drives the rotating support rod and sample B to rotate through the linkage square rod.
[0016] In summary, the present application designs a detection method and sets up a simulation processing device, so that the simulation processing device can simulate the use environment of the flame-retardant polyethylene material when it is used to make the cable sheath layer, and perform accelerated aging treatment on the sample, so that not only the flame retardant properties of the flame-retardant polyethylene material before it is put into use can be detected, but also the changes in the flame retardant properties of the flame-retardant polyethylene material after it is put into use can be detected, thereby more comprehensively and accurately evaluating the flame retardant properties of the flame-retardant polyethylene material, and providing strong technical support for the research and development, production and application of the material, and the simulation processing device can simulate the use environment of the flame-retardant polyethylene material from multiple aspects and multiple factors, thereby improving the effect and authenticity of the accelerated aging treatment, and thereby improving the accuracy of the detection; by using the intermediate elastic rod By jointly setting the body, horizontal electric telescopic rod, connecting seat, vertical electric telescopic rod, bending rod, etc., the virtual processing device can also simulate the real use scenario of flame-retardant polyethylene materials and bend sample B, thereby improving the comprehensiveness of accelerated aging treatment, further improving the effect and authenticity of accelerated aging treatment, and further improving the accuracy of detection; through the joint setting of the moving tube electric telescopic rod, linkage rod, shading tube, supporting rod body, etc., the supporting rod body can play a supporting role for the central elastic rod body without affecting the bending treatment of sample B, so as to prevent the central elastic rod body from spontaneous bending deformation, which is not only conducive to the replacement of the linkage support rod and improves the convenience of operation, but also can ensure the uniformity and effect of accelerated aging treatment. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a method flow chart of a method for detecting properties of flame-retardant polyethylene materials in the first embodiment of the present application; Figure 2 This is a schematic diagram of the three-dimensional structure of the virtual reality processing device in the first embodiment of the present application; Figure 3 This is a schematic cross-sectional view of the processing box in the first embodiment of the present application; Figure 4 This is a schematic cross-sectional view of the motor box in the first embodiment of the present application; Figure 5 This is a system structure block diagram of a processing controller in the first embodiment of the present application; Figure 6 This is a pictographic demonstration diagram of the accelerated aging treatment of sample B in the first embodiment of the present application; Figure 7 This is a schematic cross-sectional view of the processing box in the second embodiment of the present application; Figure 8 For this application Figure 7 A schematic diagram of the enlarged structure at A in the middle; Fig. 9This is a schematic cross-sectional structure diagram of a rotating support rod in the second embodiment of the present application; Fig.10 This is a system structure block diagram of a processing controller in the second embodiment of the present application; Fig.11 This is a pictographic demonstration diagram of the accelerated aging treatment of sample B in the second embodiment of the present application.
[0018] Description of the numbers in the figure: 101. Processing box; 102. Ultraviolet lamp; 103. Infrared lamp; 104. Connecting stud; 105. Motor box; 106. Driving motor; 107. Linked square rod; 108. Horizontal electric telescopic rod; 109. Connecting seat; 110. Vertical electric telescopic rod; 111. Bending rod; 002. Processing controller; 003. Linked support rod; 301. Left connecting rod body; 302. Middle elastic rod body; 303. Right connecting rod body; 304. Linked square groove; 401. Moving tube electric telescopic rod; 402. Linked rod; 403. Shading tube; 404. Connecting ring; 501. Support rod body; 502. Linked block body; 503. Translucent block. DETAILED DESCRIPTION
[0019] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.
[0020] The first implementation method: Figure 1-6 A method for testing the performance of a flame retardant polyethylene material is shown, comprising the following steps: S1. Extrusion sampling: Take an appropriate amount of flame-retardant polyethylene material from the same batch and use the extrusion molding process to make it into a standard cylindrical flame-retardant polyethylene sheath layer. After the flame-retardant polyethylene sheath layer is cooled and solidified, two sample sections of the same length and uniform quality are cut from the flame-retardant polyethylene sheath layer and marked as sample A and sample B respectively to ensure that the two samples have the same initial state. In addition, when the flame-retardant polyethylene material is made into a flame-retardant polyethylene sheath layer, if necessary, corresponding additives such as plasticizers, stabilizers, etc. can be added according to actual conditions; S2. Initial direct test: Use flame retardant performance testing equipment to test the flame retardant performance of sample A and record relevant test data; S3. Aging treatment: According to the expected use environment of the flame-retardant polyethylene material, the sample B is subjected to accelerated aging treatment by a simulated treatment device; S4. Aging retest: Use flame retardant performance testing equipment to test the flame retardant performance of sample B and record relevant test data; S5. Analysis and summary: Based on the test data of sample A, determine whether the flame retardant performance of the flame retardant polyethylene material is qualified, and by comparing the test data of sample A and sample B, analyze the change in the flame retardant performance of the flame retardant polyethylene material.
[0021] The flame retardant performance testing equipment in step S2 is one of an oxygen index meter and a horizontal vertical combustion tester, and the flame retardant performance testing equipment used in step S4 is the same as the flame retardant performance testing equipment used in step S2. The oxygen index meter and the horizontal vertical combustion tester are prior arts, and their specific structures are not described here.
[0022] See also Figure 2-5 The virtual processing device includes a processing box 101, on the inner walls of the upper and lower ends of the processing box 101, ultraviolet lamps 102 and infrared lamps 103 are respectively fixedly installed, and the side walls on the left and right sides of the processing box 101 are respectively provided with connecting studs 104 and motor boxes 105, the connecting studs 104 penetrate the side walls of the processing box 101 and are threadedly connected thereto, the motor box 105 is fixedly installed on the side walls of the processing box 101, a driving motor 106 is fixedly installed in the motor box 105, and a square linkage square rod 107 is fixedly connected to the output end of the driving motor 106, the linkage square rod 107 penetrates the side walls of the processing box 101 and is movably connected thereto, a linkage support rod 003 is movably provided in the processing box 101, and one end of the linkage support rod 003 The end is rotatably connected to the connecting stud 104 through a bearing, and the other end of the connecting support rod 003 is provided with a connecting square groove 304 matching the connecting square rod 107, and the connecting square rod 107 is movably plugged into the connecting square groove 304. A processing controller 002 is fixedly installed on the processing box 101, and a parameter setting module and a processing control module are provided in the processing controller 002. The parameter setting module is connected to the processing control module by signal, and the processing control module is connected to the ultraviolet lamp 102, the infrared lamp 103, and the driving motor 106 by signal. A control button is provided on the processing controller 002, and the control button is connected to the processing control module by signal. The inner diameter of the flame-retardant polyethylene sheath layer in step S1 matches the diameter of the connecting support rod 003.
[0023] See also Figure 2-6When the sample B is subjected to accelerated aging treatment by the virtual treatment device, the connecting stud 104 is rotated to separate the connecting stud 104 from the side wall of the treatment box 101, and then the connecting support rod 003 can be pulled out, and the sample B is sleeved on the middle elastic rod body 302 in the connecting support rod 003, and then the connecting support rod 003 is put back into the treatment box 101, and the linkage square rod 107 is re-inserted into the linkage square groove 304, and the connecting stud 104 is re-fixed to the side wall of the treatment box 101 by rotating the connecting stud 104, and the parameter setting module is set After the relevant parameters such as the power of the ultraviolet lamp 102 and the infrared lamp 103, the processing time, and the rotation speed of the driving motor 106 are set, a command is issued to the processing control module through the control button. After receiving the command, the processing control module will start the ultraviolet lamp 102, the infrared lamp 103 and the driving motor 106 according to the set parameters. The ultraviolet lamp 102 can provide an ultraviolet irradiation environment, the infrared lamp 103 can heat the sample B to provide a high temperature environment, and the driving motor 106 can drive the linked support rod 003 to rotate at a uniform speed through the linked square rod 107. Thereby, sample B can be driven to rotate at a uniform speed, so that the ultraviolet lamp 102 and the infrared lamp 103 can evenly irradiate sample B, thereby simulating the use environment of the flame-retardant polyethylene material and performing accelerated aging treatment on sample B. The processing controller 002 will control the working time of the ultraviolet lamp 102 and the infrared lamp 103 according to the set processing time. When the working time of the ultraviolet lamp 102 and the infrared lamp 103 reaches the previously set processing time, the processing control module will turn off the ultraviolet lamp 102, the infrared lamp 103 and the driving motor 106. After the accelerated aging treatment is completed, sample B can be taken out. Therefore, through the setting of the simulated processing device, the simulated processing device can simulate the use environment of the flame-retardant polyethylene material when it is used to make the cable sheath layer, and perform accelerated aging treatment on sample B. It can not only provide an ultraviolet irradiation environment, but also provide a high temperature environment, thereby improving the effect and authenticity of the accelerated aging treatment, and then improving the accuracy of the detection. The simulated processing device is simple to operate and easy to use, and sample B is easy to put in and take out, so that the simulated processing device has high practicality and functionality.
[0024] See also Figure 3 and Figure 5The rotating support rod 003 is composed of a left connecting rod body 301, a middle elastic rod body 302, and a right connecting rod body 303. The two ends of the middle elastic rod body 302 are fixedly connected to the left connecting rod body 301 and the right connecting rod body 303 respectively. The left connecting rod body 301 in the rotating support rod 003 is rotatably connected to the connecting stud 104 through a bearing, and the right connecting rod body 303 in the rotating support rod 003 is provided with a linkage square groove 304. The middle elastic rod body 302 is made of elastic heat-insulating material. A horizontal electric telescopic rod 108 is fixedly installed on the inner wall of the processing box 101, and the output end of the horizontal electric telescopic rod 108 is fixedly connected to a connecting seat 109. A vertical electric telescopic rod 110 is fixedly installed on the connecting seat 109, and the output end of the vertical electric telescopic rod 110 is fixedly connected to a bending rod 111. The processing control module is also connected to the horizontal electric telescopic rod 108 and the vertical electric telescopic rod 110 for signals.
[0025] During the use of the cable, it is inevitable that it will be bent. The bending of the cable will cause the sheath layer to be subjected to tensile or compressive forces. This physical deformation may cause changes in the microstructure inside the sheath layer, such as the arrangement of molecular chains, bond breaking, etc., which may in turn affect the flame retardant properties of the sheath layer, that is, the flame retardant polyethylene material. Therefore, in order to more realistically simulate the use environment of the flame retardant polyethylene material, it is necessary to bend it. After the processing control module turns off the ultraviolet lamp 102, the infrared lamp 103, and the driving motor 106, it will control the horizontal electric telescopic rod 108 to push the connecting seat 109 until the bending rod 111 moves to the bottom of the sample B. Then, the processing control module will control the vertical electric telescopic rod 110 to push the bending rod 111 upward, so that the bending rod 111 moves upward a certain distance (the distance that the bending rod 111 moves upward can be set through the parameter setting module), and then The bending rod 111 is driven to move downward to reset. During the upward movement of the bending rod 111, the sample B and the medium elastic rod body 302 will be squeezed, causing the sample B and the medium elastic rod body 302 to be bent. Therefore, the bending rod 111 moves up and down multiple times, so that the sample B can be bent multiple times. Those skilled in the art can set the number of times the vertical electric telescopic rod 110 drives the bending rod 111 to move up and down through the parameter setting module, and then set the number of times the sample B is bent. Therefore, through the joint setting of the medium elastic rod body 302, the horizontal electric telescopic rod 108, the connecting seat 109, the vertical electric telescopic rod 110, the bending rod 111, etc., the simulation processing device can also simulate the actual use scenario of the flame-retardant polyethylene material, and bend the sample B, thereby improving the comprehensiveness of the accelerated aging treatment, further improving the effect and authenticity of the accelerated aging treatment, and further improving the accuracy of the detection.
[0026] The second implementation method: Figure 7-11A method for detecting the performance of a flame-retardant polyethylene material is shown. Different from the first embodiment, a moving-tube electric telescopic rod 401 is fixedly installed on the inner wall of the processing box 101, and a linkage rod 402 is fixedly connected to the output end of the moving-tube electric telescopic rod 401. A light-shielding tube 403 is sleeved on the outer wall of the right connecting rod body 303 and is slidably and sealedly connected thereto. A connecting ring 404 is sleeved on the outer wall of the light-shielding tube 403, and the connecting ring 404 is rotatably connected to the light-shielding tube 403 through a bearing. The linkage rod 402 is fixedly connected to the connecting ring 404. The processing control module is also connected to the moving-tube electric telescopic rod 401 by signal. The light-shielding tube 403 is made of an opaque heat-insulating material. The inner wall of 403, the outer wall of the light-shielding tube 403 and the outer wall of the middle elastic rod body 302 are all coated with a heat-insulating coating, a supporting rod body 501 is embedded in the middle part of the middle elastic rod body 302, and the two ends of the supporting rod body 501 are respectively embedded in the left connecting rod body 301 and the right connecting rod body 303, and the supporting rod body 501 is made of paraffin wax. A plurality of light-transmitting blocks 503 evenly distributed along a ring are embedded on the outer wall of the middle elastic rod body 302, and the light-transmitting blocks 503 are made of transparent plastic, and one end of the light-transmitting blocks 503 is against the supporting rod body 501, and the inner wall of the light-shielding tube 403, the outer wall of the light-shielding tube 403 and the outer wall of the middle elastic rod body 302 are all coated with a heat-insulating coating.
[0027] See also Figure 7-11In order to be able to bend sample B, the middle elastic rod 302 is set to be an elastic rod, so that after sample B is sleeved on the middle elastic rod 302, when the linkage support rod 003 is put back into the processing box 101, the middle elastic rod 302 is easy to bend downward, making it difficult to align the linkage square groove 304 with the linkage square rod 107, which is inconvenient in operation. In the process of accelerated aging treatment of sample B, the middle elastic rod 302 may not be able to remain in a straight state and will bend and deform downward, causing sample B to bend and deform downward, which will affect the uniformity and effect of the accelerated aging treatment. In this embodiment, the hardening rod 501 can support the middle elastic rod 302. The elastic rod 302 is supported by the elastic rod 302 to keep it in a straight state. When the sample B is subjected to aging treatment, the processing control module will start the telescopic rod 401 before starting the ultraviolet lamp 102 and the infrared lamp 103, so that the telescopic rod 401 pushes the light-shielding tube 403 through the linkage rod 402 and the connecting ring 404, so that the light-shielding tube 403 moves to the light-transmitting block 503 and covers all the light-transmitting blocks 503. The elastic rod 302, the light-shielding tube 403 and the heat-insulating coating on the elastic rod 302 and the light-shielding tube 403 can play an infrared and heat-insulating role, limit the temperature increase of the supporting rod 501, and prevent the supporting rod 501 from softening. The duration is set at a time node through the parameter setting module. After the processing control module starts the ultraviolet lamp 102 and the infrared lamp 103, as the accelerated aging treatment proceeds, when the previously set time node is reached, the processing control module will control the moving tube electric telescopic rod 401 to pull the light shielding tube 403 to move and reset to expose the light-transmitting block 503. Then the infrared rays emitted by the infrared lamp 103 can pass through the light-transmitting block 503 to irradiate the supporting rod body 501, causing the temperature of the supporting rod body 501 to increase, thereby softening the supporting rod body 501, and then the subsequent bending treatment of the sample B can be carried out smoothly. Moreover, those skilled in the art can reasonably set the time node to make the softening of the supporting rod body 501 occur during the ultraviolet irradiation. At the end of the radiation treatment and high-temperature treatment, that is, when the ultraviolet lamp 102 and the infrared lamp 103 are about to be turned off, the middle elastic rod 302 can be kept in a straight state as much as possible before the bending treatment of sample B. Therefore, through the joint arrangement of the telescopic rod 401, the linkage rod 402, the light-shielding tube 403, the hardening rod 501, etc., the hardening rod 501 can play a supporting role for the middle elastic rod 302 without affecting the bending treatment of sample B, so as to prevent the middle elastic rod 302 from spontaneous bending deformation, which is not only conducive to the replacement of the linkage support rod 003 and improves the convenience of operation, but also ensures the uniformity and effect of the accelerated aging treatment.
[0028] See also Fig. 9The supporting rod body 501 is set to be square, and the upper and lower sides of the supporting rod body 501 are fixedly connected with multiple connecting blocks 502 embedded in the middle elastic rod body 302. The material of the connecting block 502 is the same as that of the supporting rod body 501, which is conducive to the rotation of the middle elastic rod body 302 and prevents the middle elastic rod body 302 from twisting when the driving motor 106 drives the connecting support rod 003 and the sample B to rotate through the linkage square rod 107. When the supporting rod body 501 softens, the connecting block 502 will also be softened by heat, and will not affect the bending processing of the sample B.
[0029] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.
Claims
1. A method for detecting properties of flame retardant polyethylene materials, characterized in that: The following steps are involved: S1. Extrusion sampling: Take an appropriate amount of flame-retardant polyethylene material from the same batch and make it into a standard cylindrical flame-retardant polyethylene sheath layer by extrusion molding process. After the flame-retardant polyethylene sheath layer is cooled and solidified, two sample sections of the same length and uniform quality are cut from the flame-retardant polyethylene sheath layer and marked as sample A and sample B respectively; S2. Initial direct test: Use flame retardant performance testing equipment to test the flame retardant performance of sample A and record relevant test data; S3. Aging treatment: According to the expected use environment of the flame-retardant polyethylene material, the sample B is subjected to accelerated aging treatment using a simulated treatment device; S4. Aging retest: Use flame retardant performance testing equipment to test the flame retardant performance of sample B and record relevant test data; S5. Analysis and summary: Based on the test data of sample A, determine whether the flame retardant performance of the flame retardant polyethylene material is qualified, and analyze the change of the flame retardant performance of the flame retardant polyethylene material by comparing the test data of sample A and sample B; The virtual processing device comprises a processing box (101), wherein an ultraviolet lamp (102) and an infrared lamp (103) are fixedly mounted on the inner walls at the upper and lower ends of the processing box (101), respectively, and connecting studs (104) and a motor box (105) are respectively arranged on the side walls on the left and right sides of the processing box (101), wherein the connecting studs (104) penetrate the side walls of the processing box (101) and are threadedly connected thereto, and the motor box (105) is fixedly mounted on the side walls of the processing box (101), and a driving motor (106) is fixedly mounted in the motor box (105). The output end of the driving motor (106) is fixedly connected to a square linkage square rod (107), the linkage square rod (107) penetrates the side wall of the processing box (101) and is movably connected thereto, a linkage support rod (003) is movably arranged in the processing box (101), one end of the linkage support rod (003) is rotatably connected to the connecting stud (104) via a bearing, and the other end of the linkage support rod (003) is provided with a linkage square groove (304) matching the linkage square rod (107), and the linkage square rod (107) is movably plugged into the linkage square groove (304).
2. A flame retardant polyethylene material performance detection method according to claim 1, characterized in that: A processing controller (002) is fixedly mounted on the processing box (101), and a parameter setting module and a processing control module are provided in the processing controller (002), and the parameter setting module is signal-connected to the processing control module, and the processing control module is signal-connected to the ultraviolet lamp (102), the infrared lamp (103), and the driving motor (106), and a control button is provided on the processing controller (002), and the control button is signal-connected to the processing control module, and the inner diameter of the flame-retardant polyethylene sheath layer in step S1 matches the diameter of the rotating support rod (003).
3. A flame retardant polyethylene material performance detection method according to claim 2, characterized in that: The joint rotation support rod (003) is composed of a left connecting rod body (301), a middle elastic rod body (302), and a right connecting rod body (303); the two ends of the middle elastic rod body (302) are fixedly connected to the left connecting rod body (301) and the right connecting rod body (303) respectively; the left connecting rod body (301) in the joint rotation support rod (003) is rotatably connected to the connecting stud (104) via a bearing; the right connecting rod body (303) in the joint rotation support rod (003) is provided with a linkage square groove (304); the middle elastic rod body (302) is made of elastic heat-insulating material; and a transverse electric telescopic rod (108) is fixedly mounted on the inner wall of the processing box (101).
4. A flame retardant polyethylene material performance detection method according to claim 3, characterized in that: The output end of the horizontal electric telescopic rod (108) is fixedly connected to a connection seat (109), a vertical electric telescopic rod (110) is fixedly mounted on the connection seat (109), the output end of the vertical electric telescopic rod (110) is fixedly connected to a bending rod (111), and the processing control module is also signal-connected to the horizontal electric telescopic rod (108) and the vertical electric telescopic rod (110).
5. A flame retardant polyethylene material performance detection method according to claim 3, characterized in that: A cylinder-shifting electric telescopic rod (401) is also fixedly mounted on the inner wall of the processing box (101); the output end of the cylinder-shifting electric telescopic rod (401) is fixedly connected to a linkage rod (402); a light-shielding cylinder (403) is sleeved on the outer wall of the right connecting rod body (303) and is slidably and sealingly connected thereto; a connecting ring (404) is sleeved on the outer wall of the light-shielding cylinder (403); the connecting ring (404) is rotatably connected to the light-shielding cylinder (403) via a bearing; the linkage rod (402) is fixedly connected to the connecting ring (404); and the processing control module is also signal-connected to the cylinder-shifting electric telescopic rod (401).
6. A flame retardant polyethylene material performance detection method according to claim 5, characterized in that: The light-shielding tube (403) is made of a light-proof heat-insulating material, a supporting rod (501) is embedded in the middle of the middle elastic rod (302), two ends of the supporting rod (501) are respectively embedded in the left connecting rod (301) and the right connecting rod (303), the supporting rod (501) is made of paraffin, and a plurality of light-transmitting blocks (503) evenly distributed along a ring are embedded on the outer wall of the middle elastic rod (302), the light-transmitting blocks (503) are made of transparent plastic, and one end of the light-transmitting blocks (503) is against the supporting rod (501).
7. A flame retardant polyethylene material performance detection method according to claim 6, characterized in that: The inner wall of the light-shielding cylinder (403), the outer wall of the light-shielding cylinder (403) and the outer wall of the intermediate elastic rod body (302) are all coated with a heat-insulating coating.
8. A flame retardant polyethylene material performance detection method according to claim 6, characterized in that: The supporting rod body (501) is arranged in a square shape, and a plurality of connecting blocks (502) embedded in the middle elastic rod body (302) are fixedly connected to the upper and lower sides of the supporting rod body (501), and the material of the connecting blocks (502) is the same as that of the supporting rod body (501).
9. A flame retardant polyethylene material performance detection method according to claim 1, characterized in that: The flame retardant performance testing equipment in step S2 is one of an oxygen index tester and a horizontal and vertical combustion tester, and the flame retardant performance testing equipment used in step S4 is the same as the flame retardant performance testing equipment used in step S2.