Performance detection method for polyvinyl chloride cable material

Abstract

The invention relates to a polyvinyl chloride cable material performance detection method applied to the technical field of material detection, the method is based on a corrosion penetration intelligent detection device and comprises the steps of sample installation, push plate pressurization, liquid injection soaking and the like, and by means of the detection method, whether the corrosion resistance of a polyvinyl chloride cable material is qualified or not can be detected; if the sample is corroded and punctured in the detection process, when the sample is corroded and punctured can be accurately detected, so that the detection comprehensiveness can be improved, the corrosion resistance of the polyvinyl chloride cable material can be more comprehensively and accurately detected, and after the detection is finished, whether the sample is corroded and punctured or not does not need to be checked in a naked eye observation mode; in the detection process, the outer surface or the inner surface of the sample can be independently soaked in the detection solution, the inner surface and the outer surface of the sample can also be soaked in the detection solution at the same time, and the detection diversity and comprehensiveness are improved.

Description

Technical Field

[0001] The invention relates to a detection method, in particular to a polyvinyl chloride cable material performance detection method applied in the technical field of material detection. Background Art

[0002] PVC cable material is a kind of wire and cable material made of PVC resin as the main raw material, with a certain proportion of plasticizer, stabilizer, filler, lubricant and other auxiliary materials added. PVC cable material is often used to make the insulation layer and sheath layer of the cable due to its good insulation, mechanical properties and processing properties.

[0003] The cable sheath is a barrier between the cable and the external environment, so its corrosion resistance is particularly important. Under complex and changing environmental conditions, the cable sheath needs to withstand the erosion of various corrosive substances for a long time. In order to ensure the safety of the cable, it is necessary to test the corrosion resistance of polyvinyl chloride cable materials.

[0004] The immersion test method is a commonly used method for testing the corrosion resistance of polyvinyl chloride cable materials. During the test, a section of the cable sheath layer made of polyvinyl chloride cable material is usually cut off as a sample, and the sample is immersed in a corrosive test solution, and the corrosion condition of the sample is observed after a period of time.

[0005] The detection method in the prior art can detect whether the corrosion resistance of the polyvinyl chloride cable material is qualified. However, if the corrosion resistance of the polyvinyl chloride cable material is unqualified, the sample is corroded and broken down during the detection process, and it is impossible to accurately detect when the sample is corroded and broken down, which has certain shortcomings. Therefore, we propose a method for detecting the performance of polyvinyl chloride cable materials. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is: if a sample is corroded and broken down, how to accurately detect when the sample is corroded and broken down.

[0007] In order to solve the above problems, the present invention provides a method for detecting the performance of polyvinyl chloride cable materials, which is based on a corrosion penetration intelligent detection device. The corrosion penetration intelligent detection device includes a detection box and a corrosion penetration intelligent detector installed on the detection box. A connecting adjustment cylinder is provided through the top outer wall of the detection box. The connecting adjustment cylinder is threadedly connected to the top outer wall of the detection box. An electric telescopic rod is fixedly installed on the top inner wall of the connecting adjustment cylinder. The output end of the electric telescopic rod is fixedly connected to a piston plate that is slidingly sealed with the detection box. An air pressure sensor is provided below the piston plate. The side wall of the detection box is connected to an external liquid injection pipe. The bottom end of the connecting adjustment cylinder is fixedly connected to There is a sample detection through-fitting, which includes an upper connecting tube body, a middle transparent tube body, and a lower abutting tube body matched with the upper connecting tube body, which are fixedly connected in sequence. The middle transparent tube body is a porous mesh structure, and the outer diameter of the middle transparent tube body is smaller than the outer diameter of the upper connecting tube body. An upper sample sealing sleeve threadedly connected to the upper connecting tube body is sleeved on the outer wall of the upper connecting tube body, and a lower sample sealing sleeve threadedly connected to the upper connecting tube body is sleeved on the outer wall of the middle transparent tube body. The bottom end of the upper sample sealing sleeve and the top end of the lower sample sealing sleeve are both set to be open. The top end of the upper connecting tube body is fixedly connected to the bottom end of the connecting adjustment tube, and an air guide hole for communicating with the upper connecting tube body is opened on the outer wall of the bottom end of the connecting adjustment tube. The intelligent corrosion detection device is provided with an intelligent corrosion detection system, which includes a corrosion detection and analysis module and a corrosion timing module. The corrosion detection and analysis module is signal-connected with the corrosion timing module and the air pressure sensor. The intelligent corrosion detection device is provided with a display screen and a start button. The start button is signal-connected with the corrosion detection and analysis module, and the corrosion detection and analysis module is signal-connected with the display screen. The detection method includes the following steps: S1. Install the sample: Cut a section of cable sheath made of polyvinyl chloride cable material as a sample, install the sample on the sample-covering inspection pipe fitting, and seal the upper and lower ends of the sample with the upper and lower sealing sleeves; S2, push plate pressurization: start the electric telescopic rod, so that the electric telescopic rod drives the piston plate to move downward a certain distance, causing the air pressure under the piston plate and inside the sample inspection pipe to increase; S3, liquid injection and immersion: inject an appropriate amount of corrosive test solution into the test box through the test external liquid injection tube, so that the sample is immersed in the test solution; S4, button start: a soaking time is reasonably set according to the actual situation, and the start button is pressed to issue an instruction to the corrosion detection and analysis module. After receiving the instruction, the corrosion detection and analysis module will send a signal to the corrosion timing module to start timing. At the same time, the corrosion detection and analysis module will also start the air pressure sensor to monitor the change of air pressure under the piston plate, and the air pressure data monitored by the air pressure sensor will be transmitted to the corrosion detection and analysis module in real time; S5. Take out and observe: After the sample has been immersed for a certain period of time, take out the sample and observe the corrosion of the sample; S6. Time display for corrosion detection: During the detection process, when the sample is corroded and penetrated by the detection solution, the air inside the sample detection penetration tube will leak out through the penetrated part, causing the air pressure under the piston plate to decrease. Therefore, the corrosion detection and analysis module can find out that the sample has been corroded and penetrated by analyzing the air pressure data monitored by the air pressure sensor. At this time, the corrosion detection and analysis module will obtain the duration data from the corrosion timing module, and send the duration data to the display screen and display it on the display screen.

[0008] In the above-mentioned polyvinyl chloride cable material performance testing method, if the sample is corroded and broken down during the testing process, it can be accurately detected when the sample is corroded and broken down, thereby improving the comprehensiveness of the test and being able to more comprehensively and accurately test the corrosion resistance of the polyvinyl chloride cable material.

[0009] As a further improvement of the present application, the inner diameter of the sample matches the outer diameters of the upper connecting tube body and the lower abutting tube body, and the outer diameter of the sample matches the inner diameters of the upper sealing sleeve and the lower sealing sleeve. The length of the sample is greater than the length of the middle transparent tube body. In step S1, when the sample is installed on the sample sleeve inspection fitting, the top end of the sample must be higher than the top end of the middle transparent tube body, and the bottom end of the sample must be lower than the bottom end of the middle transparent tube body.

[0010] As a further improvement of the present application, in step S1, when the upper and lower sample sealing sleeves are used to seal the sample, the bottom end of the upper sealing sleeve needs to be flush with the bottom end of the upper connecting tube body, and the top end of the lower sealing sleeve needs to be flush with the top end of the lower abutting tube body.

[0011] As a further improvement of the present application, in step S3, when the detection solution is injected into the detection box, the final liquid level of the detection solution must be higher than the bottom end of the upper sealing sleeve and lower than the top end of the upper sealing sleeve. The liquid level is higher than the bottom end of the upper sealing sleeve to ensure that the sample can be immersed in the detection solution, and the liquid level is lower than the top end of the upper sealing sleeve to reduce the waste of the detection solution.

[0012] As another improvement of the present application, an internal inspection liquid injection tube is also provided on the connecting and adjusting cylinder. The internal inspection liquid injection tube passes through the connecting and adjusting cylinder and is sealed and fixedly connected to the detection box. The internal inspection liquid injection tube passes through the piston plate and is slidingly and sealingly connected to the piston plate. The internal inspection liquid injection tube is arranged in an L shape, and the bottom end of the internal inspection liquid injection tube is connected to the interior of the upper connecting tube body. The top end of the internal inspection liquid injection tube is provided with a matching sealing cover, so that the detection solution can be injected into the inner side of the sample through the internal inspection liquid injection tube.

[0013] As another improved supplement of the present application, the detection method further comprises the following steps: S3.5. Injection from the inside: Unscrew the sealing cap and inject an appropriate amount of test solution into the inside of the sample inspection fitting through the inner injection tube. After the test solution is injected, screw the sealing cap back on to seal the top of the inner injection tube.

[0014] As another improved supplement of the present application, step S3 and step S3.5 may both be executed, or only one of them may be executed. When step S3.5 and step S3 are both executed, step S3 and step S3.5 are executed synchronously, and finally the liquid level of the detection solution on the inner side of the sample detection tube must be higher than the liquid level of the detection solution on the outer side of the sample detection tube.

[0015] In summary, the detection method in the present application can not only detect whether the corrosion resistance of the polyvinyl chloride cable material is qualified, but also accurately detect when the sample is corroded and broken down if the sample is corroded and broken down during the detection process, thereby improving the comprehensiveness of the detection, and can more comprehensively and accurately detect the corrosion resistance of the polyvinyl chloride cable material. After the detection, there is no need to check whether the sample is corroded and broken down by naked eye observation, thereby improving the detection efficiency and accuracy of the detection; and during the detection, the outer surface of the sample can be immersed in the detection solution alone, the inner surface of the sample can be immersed in the detection solution alone, and the inner and outer surfaces of the sample can be immersed in the detection solution at the same time, which improves the diversity of the detection method, enriches the detection content, and further improves the comprehensiveness of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a method flow chart of the first implementation mode of this application; Figure 2 This is a schematic diagram of the three-dimensional structure of the corrosion penetration intelligent detection device in the first embodiment of the present application; Figure 3 This is a schematic cross-sectional view of the detection box in the first embodiment of the present application; Figure 4 This is a schematic diagram of the cross-sectional structure of the connection adjustment cylinder in the first embodiment of the present application; Figure 5 This is a schematic cross-sectional structural diagram of a sample-penetrating pipe fitting in the first embodiment of the present application; Figure 6 This is a logic control block diagram of the corrosion detection device in the first embodiment of the present application; Figure 7 This is a pictographic demonstration diagram of testing a sample in the first embodiment of the present application; Figure 8 This is a schematic diagram of the three-dimensional structure of the corrosion penetration intelligent detection device in the second and third embodiments of the present application; Fig. 9 This is a schematic diagram of the cross-sectional structure of the connection adjustment cylinder in the second and third embodiments of the present application; Fig.10 This is a flow chart of a method in the second embodiment of the present application; Fig.11This is a flow chart of the method in the third embodiment of the present application.

[0017] Description of the numbers in the figure: 101. Inspection box; 102. Connecting adjustment cylinder; 103. Electric telescopic rod; 104. Piston plate; 105. Air guide hole; 106. Air pressure sensor; 107. External liquid injection tube; 108. Internal liquid injection tube; 109. Sealing cover; 002. Corrosion penetration intelligent detector; 301. Upper connecting tube body; 302. Middle penetrating tube body; 303. Lower supporting tube body; 304. Upper sealing sleeve; 305. Lower sealing sleeve. DETAILED DESCRIPTION

[0018] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0019] The first implementation method: Figure 1-7 A method for detecting the performance of polyvinyl chloride cable materials is shown, which is based on a corrosion penetration intelligent detection device. The corrosion penetration intelligent detection device includes a detection box 101 and a corrosion penetration intelligent detector 002 installed on the detection box 101. A connecting and adjusting cylinder 102 is provided on the top outer wall of the detection box 101, and the connecting and adjusting cylinder 102 is threadedly connected to the top outer wall of the detection box 101. An electric telescopic rod 103 is fixedly installed on the top inner wall of the connecting and adjusting cylinder 102. The output end of the electric telescopic rod 103 is fixedly connected to a piston plate 104 that is slidingly and sealingly connected to the detection box 101. An air pressure sensor 106 is provided below the piston plate 104. The side wall of the detection box 101 is connected to an external injection pipe 107. The bottom end of the connecting and adjusting cylinder 102 is fixedly connected to a sample detection penetration pipe fitting. The sample detection pipe fitting includes an upper connecting pipe body 301, a middle transparent pipe body 302, and a lower abutting pipe body 303 matched with the upper connecting pipe body 301, which are fixedly connected in sequence. The middle transparent pipe body 302 is a porous mesh structure, and the outer diameter of the middle transparent pipe body 302 is smaller than the outer diameter of the upper connecting pipe body 301. An upper sample sealing sleeve 304 threadedly connected to the upper connecting pipe body 301 is sleeved on the outer wall of the upper connecting pipe body 301, and a lower sample sealing sleeve 305 threadedly connected to the middle transparent pipe body 302 is sleeved on the outer wall of the middle transparent pipe body 302. The bottom end of the upper sample sealing sleeve 304 and the top end of the lower sample sealing sleeve 305 are both arranged to be open. The top end of the upper connecting pipe body 301 is fixedly connected to the bottom end of the connecting and adjusting cylinder 102, and an air guide hole 105 for communicating with the upper connecting pipe body 301 is opened on the outer wall of the bottom end of the connecting and adjusting cylinder 102.

[0020] See also Figure 6 The intelligent corrosion detection device 002 is provided with an intelligent corrosion detection system, which includes a corrosion detection and analysis module and a corrosion timing module. The corrosion detection and analysis module are signal-connected with the corrosion timing module and the air pressure sensor 106. The intelligent corrosion detection device 002 is provided with a display screen and a start button. The start button is signal-connected with the corrosion detection and analysis module, and the corrosion detection and analysis module is signal-connected with the display screen.

[0021] See also Figure 1-7 , the detection method comprises the following steps: S1. Installing the sample: Cut a section of cable sheath layer made of polyvinyl chloride cable material as a sample, install the sample on the sample-covering inspection pipe fitting, and seal the upper and lower ends of the sample by the upper sealing sleeve 304 and the lower sealing sleeve 305; S2, push plate pressurization: start the electric telescopic rod 103, so that the electric telescopic rod 103 drives the piston plate 104 to move downward a certain distance, causing the air pressure below the piston plate 104 and inside the sample inspection pipe to increase; S3, liquid injection and immersion: inject an appropriate amount of corrosive detection solution into the detection box 101 through the external detection liquid injection tube 107, so that the sample is immersed in the detection solution; S4, button start: a soaking time is reasonably set according to the actual situation, and the start button is pressed to issue an instruction to the corrosion detection and analysis module. After receiving the instruction, the corrosion detection and analysis module will send a signal to the corrosion timing module to start timing. At the same time, the corrosion detection and analysis module will also start the air pressure sensor 106, so that the air pressure sensor 106 monitors the change of air pressure under the piston plate 104, and the air pressure data monitored by the air pressure sensor 106 will be transmitted to the corrosion detection and analysis module in real time; S5. Take out and observe: After the sample has been immersed for a certain period of time, take out the sample and observe the corrosion of the sample; S6. Time display for corrosion detection: During the detection process, when the sample is corroded and penetrated by the detection solution, the air inside the sample detection penetration tube will leak outward through the penetrated part, causing the air pressure below the piston plate 104 to decrease. Therefore, the corrosion detection and analysis module can find out that the sample has been corroded and penetrated by analyzing the air pressure data monitored by the air pressure sensor 106. At this time, the corrosion detection and analysis module will obtain the duration data from the corrosion timing module, and send the duration data to the display screen and display it on the display screen.

[0022] See also Figure 7 The inner diameter of the sample matches the outer diameter of the upper connecting tube body 301 and the lower supporting tube body 303, and the outer diameter of the sample matches the inner diameter of the upper sealing sleeve 304 and the lower sealing sleeve 305. The length of the sample is greater than the length of the middle transparent tube body 302. In step S1, when the sample is installed on the sample detection pipe fitting, the top end of the sample must be higher than the top end of the middle transparent tube body 302, and the bottom end of the sample must be lower than the bottom end of the middle transparent tube body 302.

[0023] In step S1, the specific operation of installing the sample on the sample detection tube is: rotate the connecting adjustment cylinder 102 to separate the connecting adjustment cylinder 102 from the detection box 101, and pull the sample detection tube out of the detection box 101, unscrew the lower sealing sleeve 305 from the lower abutment tube body 303, and then put the sample on the outside of the middle transparent tube body 302, re-put the lower sealing sleeve 305 on the lower abutment tube body 303, and then reinsert the sample detection tube into the detection box 101, rotate the connecting adjustment cylinder 102, so that the bottom end of the connecting adjustment cylinder 102 is inserted into the detection box 101, until the bottom end of the lower abutment tube body 303 and the bottom inner wall of the detection box 101 are abutted.

[0024] In step S1, when the upper and lower parts of the sample are sealed by the upper and lower sealing sleeves 304 and 305, the bottom end of the upper and lower sealing sleeves 304 needs to be flush with the bottom end of the upper connecting tube body 301, and the top end of the lower and lower sealing sleeves 305 needs to be flush with the top end of the lower abutting tube body 303. The specific operation of sealing the top and bottom of the sample by the upper and lower sealing sleeves 304 and 305 is as follows: rotate the upper and lower sealing sleeves 304 to move the upper and lower sealing sleeves 304 downward and sleeve onto the outer wall of the sample until the bottom end of the upper and lower sealing sleeves 304 needs to be flush with the bottom end of the upper connecting tube body 301, rotate the lower and lower sealing sleeves 305 to move the lower and lower sealing sleeves 305 upward and sleeve onto the outer wall of the sample until the top end of the lower and lower sealing sleeves 305 needs to be flush with the top end of the lower abutting tube body 303.

[0025] In step S3, when the detection solution is injected into the detection box 101, the final liquid level of the detection solution should be higher than the bottom end of the upper sealing sleeve 304 and lower than the top end of the upper sealing sleeve 304. The liquid level is higher than the bottom end of the upper sealing sleeve 304 to ensure that the sample can be immersed in the detection solution, and the liquid level is lower than the top end of the upper sealing sleeve 304 to reduce the waste of the detection solution.

[0026] After the test is completed, the technicians in this field can observe whether there is time data displayed on the display screen. If there is no time data, it means that the sample has not been corroded and broken down. If there is time data displayed, it means that the sample has been corroded and broken down. The technicians in this field can know when the sample was corroded and broken down based on the time data displayed on the display screen. In addition, in the traditional detection method, after the test is completed, the technicians in this field need to check whether the sample is corroded and broken down by naked eye observation, which is not only inefficient but also easy to miss some small corrosion breakdown points. However, the detection method in this application can directly Whether the sample is corroded and broken down can be detected directly without the need to check whether the sample is corroded and broken down by naked eye observation. Therefore, the detection method in the present application can not only detect whether the corrosion resistance of the polyvinyl chloride cable material is qualified, but also accurately detect when the sample is corroded and broken down if the sample is corroded and broken down during the detection process, thereby improving the comprehensiveness of the detection, and being able to more comprehensively and accurately detect the corrosion resistance of the polyvinyl chloride cable material. After the detection, there is no need to check whether the sample is corroded and broken down by naked eye observation, thereby improving the detection efficiency and detection accuracy.

[0027] The top of the external inspection liquid injection tube 107 is provided with a matching tube cap (not shown in the figure). When injecting the detection solution, the tube cap can be unscrewed. After the detection solution is injected, the tube cap is screwed on again to seal the top of the external inspection liquid injection tube 107. In this way, the corrosion penetration intelligent detection device can be in a sealed state, thereby effectively preventing the detection solution from volatilizing and endangering the health of technicians.

[0028] The second implementation method: Figure 8-10 A method for testing the performance of polyvinyl chloride cable materials is shown. Different from the first embodiment, an internal inspection liquid injection tube 108 is also provided on the connecting and adjusting cylinder 102. The internal inspection liquid injection tube 108 passes through the connecting and adjusting cylinder 102 and is sealed and fixedly connected to the testing box 101. The internal inspection liquid injection tube 108 passes through the piston plate 104 and is slidingly and sealingly connected to the piston plate 104. The internal inspection liquid injection tube 108 is arranged in an L shape, and the bottom end of the internal inspection liquid injection tube 108 is connected to the interior of the upper connecting tube body 301, and the top end of the internal inspection liquid injection tube 108 is provided with a matching sealing cover 109.

[0029] The detection method includes the following steps: S1. Installing the sample: Cut a section of cable sheath layer made of polyvinyl chloride cable material as a sample, install the sample on the sample-covering inspection pipe fitting, and seal the upper and lower ends of the sample by the upper sealing sleeve 304 and the lower sealing sleeve 305; S2, push plate pressurization: start the electric telescopic rod 103, so that the electric telescopic rod 103 drives the piston plate 104 to move downward a certain distance, causing the air pressure below the piston plate 104 and inside the sample inspection pipe to increase; S3, liquid injection and immersion: inject an appropriate amount of corrosive detection solution into the detection box 101 through the external detection liquid injection tube 107, so that the sample is immersed in the detection solution; S3.5, inner side injection: unscrew the sealing cap 109, and inject a proper amount of detection solution into the inner side of the sample inspection pipe through the detection inner injection tube 108. After the detection solution is injected, screw the sealing cap 109 again to seal the top of the detection inner injection tube 108; S4, button start: a soaking time is reasonably set according to the actual situation, and the start button is pressed to issue an instruction to the corrosion detection and analysis module. After receiving the instruction, the corrosion detection and analysis module will send a signal to the corrosion timing module to start timing. At the same time, the corrosion detection and analysis module will also start the air pressure sensor 106, so that the air pressure sensor 106 monitors the change of air pressure under the piston plate 104, and the air pressure data monitored by the air pressure sensor 106 will be transmitted to the corrosion detection and analysis module in real time; S5. Take out and observe: After the sample has been immersed for a certain period of time, take out the sample and observe the corrosion of the sample; S6. Time display for corrosion detection: During the detection process, when the sample is corroded and penetrated by the detection solution, the air inside the sample detection penetration tube will leak outward through the penetrated part, causing the air pressure below the piston plate 104 to decrease. Therefore, the corrosion detection and analysis module can find out that the sample has been corroded and penetrated by analyzing the air pressure data monitored by the air pressure sensor 106. At this time, the corrosion detection and analysis module will obtain the duration data from the corrosion timing module, and send the duration data to the display screen and display it on the display screen.

[0030] Step S3.5 is performed simultaneously with step S3, and the liquid level of the detection solution on the inner side of the sample inspection tube must be higher than the liquid level of the detection solution on the outer side of the sample inspection tube, so that during the inspection, the outer surface of the sample can be immersed in the detection solution alone, or the inner and outer surfaces of the sample can be immersed in the detection solution at the same time, further improving the comprehensiveness of the inspection.

[0031] The third implementation method: Figure 8-9 and Fig.11 A method for testing the performance of a polyvinyl chloride cable material is shown. Different from the first embodiment, the testing method includes the following steps: S1. Installing the sample: Cut a section of cable sheath layer made of polyvinyl chloride cable material as a sample, install the sample on the sample-covering inspection pipe fitting, and seal the upper and lower ends of the sample by the upper sealing sleeve 304 and the lower sealing sleeve 305; S2, push plate pressurization: start the electric telescopic rod 103, so that the electric telescopic rod 103 drives the piston plate 104 to move downward a certain distance, causing the air pressure below the piston plate 104 and inside the sample inspection pipe to increase; S3.5, inner side injection: unscrew the sealing cap 109, and inject a proper amount of detection solution into the inner side of the sample inspection tube through the detection inner injection tube 108. After the detection solution is injected, screw the sealing cap 109 again to seal the top of the detection inner injection tube 108. When the detection solution is injected, the liquid level of the detection solution must be higher than the top of the middle transparent tube body 302; S4, button start: a soaking time is reasonably set according to the actual situation, and the start button is pressed to issue an instruction to the corrosion detection and analysis module. After receiving the instruction, the corrosion detection and analysis module will send a signal to the corrosion timing module to start timing. At the same time, the corrosion detection and analysis module will also start the air pressure sensor 106, so that the air pressure sensor 106 monitors the change of air pressure under the piston plate 104, and the air pressure data monitored by the air pressure sensor 106 will be transmitted to the corrosion detection and analysis module in real time; S5. Take out and observe: After the sample has been immersed for a certain period of time, take out the sample and observe the corrosion of the sample; S6. Time display for corrosion detection: During the detection process, when the sample is corroded and penetrated by the detection solution, the air inside the sample detection penetration tube will leak outward through the penetrated part, causing the air pressure below the piston plate 104 to decrease. Therefore, the corrosion detection and analysis module can find out that the sample has been corroded and penetrated by analyzing the air pressure data monitored by the air pressure sensor 106. At this time, the corrosion detection and analysis module will obtain the duration data from the corrosion timing module, and send the duration data to the display screen and display it on the display screen.

[0032] During testing, the outer surface of the sample can be immersed in the testing solution alone, the inner and outer surfaces of the sample can be immersed in the testing solution at the same time, or the inner surface of the sample can be immersed in the testing solution alone, which increases the diversity of testing methods, enriches the testing content, and further improves the comprehensiveness of the testing.

[0033] 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 the performance of polyvinyl chloride cable materials, characterized in that: Based on the intelligent corrosion detection device, the intelligent corrosion detection device comprises a detection box (101) and an intelligent corrosion detection device (002) installed on the detection box (101); a connection adjustment cylinder (102) is provided through the top outer wall of the detection box (101); the connection adjustment cylinder (102) is threadedly connected to the top outer wall of the detection box (101); an electric telescopic rod (103) is fixedly installed on the top inner wall of the connection adjustment cylinder (102); the output end of the electric telescopic rod (103) is fixedly connected to a piston plate (104) which is slidably and sealingly connected to the detection box (101); an air pressure sensor (106) is provided below the piston plate (104); a side wall of the detection box (101) is connected to an external inspection liquid injection pipe (107); the bottom end of the connection adjustment cylinder (102) is fixedly connected to a sample detection pipe fitting; the sample detection pipe fitting includes a The invention comprises an upper connecting tube body (301), a middle transparent tube body (302), and a lower abutting tube body (303) matched with the upper connecting tube body (301) which are fixedly connected in sequence, the middle transparent tube body (302) is a multi-porous mesh structure, and the outer diameter of the middle transparent tube body (302) is smaller than the outer diameter of the upper connecting tube body (301), an upper sealing sleeve (304) threadedly connected to the upper connecting tube body (301) is sleeved on the outer wall of the upper connecting tube body (301), and a lower sealing sleeve (305) threadedly connected to the upper connecting tube body (301) is sleeved on the outer wall of the middle transparent tube body (302), the bottom end of the upper sealing sleeve (304) and the top end of the lower sealing sleeve (305) are both arranged in an open shape, the top end of the upper connecting tube body (301) is fixedly connected to the bottom end of the connecting adjusting tube (102), and an air guide hole (105) for communicating with the upper connecting tube body (301) is opened on the outer wall of the bottom end of the connecting adjusting tube (102); The intelligent corrosion detection device (002) is provided with an intelligent corrosion detection system, the intelligent corrosion detection system comprising a corrosion detection analysis module and a corrosion timing module, the corrosion detection analysis module is signal-connected to the corrosion timing module and the air pressure sensor (106), the intelligent corrosion detection device (002) is provided with a display screen and a start button, the start button is signal-connected to the corrosion detection analysis module, and the corrosion detection analysis module is signal-connected to the display screen; The detection method comprises the following steps: S1. Installing the sample: Cut a section of cable sheath layer made of polyvinyl chloride cable material as a sample, install the sample on the sample-covering inspection pipe fitting, and seal the upper and lower ends of the sample by an upper sealing sleeve (304) and a lower sealing sleeve (305); S2, push plate pressurization: start the electric telescopic rod (103), so that the electric telescopic rod (103) drives the piston plate (104) to move downward a certain distance, so that the air pressure below the piston plate (104) and inside the sample inspection pipe fitting increases; S3, liquid injection and immersion: injecting an appropriate amount of corrosive detection solution into the detection box (101) through the external detection liquid injection pipe (107), so that the sample is immersed in the detection solution; S4, button start: a soaking time is reasonably set according to the actual situation, and the start button is pressed to issue an instruction to the corrosion detection and analysis module. After receiving the instruction, the corrosion detection and analysis module will send a signal to the corrosion timing module to start timing. At the same time, the corrosion detection and analysis module will also start the air pressure sensor (106) to enable the air pressure sensor (106) to monitor the change of air pressure under the piston plate (104), and the air pressure data monitored by the air pressure sensor (106) will be transmitted to the corrosion detection and analysis module in real time; S5. Take out and observe: After the sample has been immersed for a certain period of time, take out the sample and observe the corrosion of the sample; S6. Breakthrough detection and display: During the detection process, when the sample is corroded and penetrated by the detection solution, the air inside the sample penetration detection pipe will leak outward through the penetrated part, causing the air pressure below the piston plate (104) to decrease. At this time, the breakthrough detection and analysis module will obtain the duration data from the corrosion timing module, and send the duration data to the display screen and display it on the display screen.

2. A polyvinyl chloride cable material performance detection method according to claim 1, characterized in that: The inner diameter of the sample matches the outer diameters of the upper connecting tube body (301) and the lower abutting tube body (303), and the outer diameter of the sample matches the inner diameters of the upper sealing sleeve (304) and the lower sealing sleeve (305), and the length of the sample is greater than the length of the middle transparent tube body (302).

3. A polyvinyl chloride cable material performance detection method according to claim 1, characterized in that: In step S1, when the sample is installed on the sample-covering inspection pipe fitting, the top end of the sample needs to be higher than the top end of the middle-penetrating tube body (302), and the bottom end of the sample needs to be lower than the bottom end of the middle-penetrating tube body (302).

4. A polyvinyl chloride cable material performance detection method according to claim 3, characterized in that: In step S1, when the upper and lower parts of the sample are sealed by the upper sample sealing sleeve (304) and the lower sample sealing sleeve (305), the bottom end of the upper sample sealing sleeve (304) needs to be flush with the bottom end of the upper connecting tube body (301), and the top end of the lower sample sealing sleeve (305) needs to be flush with the top end of the lower abutting tube body (303).

5. A polyvinyl chloride cable material performance detection method according to claim 1, characterized in that: In the step S3, when the detection solution is injected into the detection box (101), the final liquid level of the detection solution is higher than the bottom end of the upper sealing sleeve (304) and lower than the top end of the upper sealing sleeve (304).

6. A polyvinyl chloride cable material performance testing method according to claim 1, characterized in that: The connecting and adjusting cylinder (102) is also provided with an internal inspection liquid injection pipe (108), the internal inspection liquid injection pipe (108) passes through the connecting and adjusting cylinder (102) and is sealed and fixedly connected to the detection box (101), the internal inspection liquid injection pipe (108) passes through the piston plate (104) and is slidably and sealedly connected to the piston plate (104), the internal inspection liquid injection pipe (108) is arranged in an L shape, and the bottom end of the internal inspection liquid injection pipe (108) is connected to the interior of the upper connecting tube body (301), and the top end of the internal inspection liquid injection pipe (108) is provided with a sealing cover (109) matching the internal inspection liquid injection pipe (108).

7. A polyvinyl chloride cable material performance detection method according to claim 6, characterized in that: The detection method further comprises the following steps: S3.5, inner side injection: unscrew the sealing cap (109), and inject a proper amount of detection solution into the inner side of the sample detection tube through the detection inner liquid injection tube (108). After the detection solution is injected, screw the sealing cap (109) back on to seal the top end of the detection inner liquid injection tube (108).

8. A polyvinyl chloride cable material performance testing method according to claim 7, characterized in that: The step S3.5 and step S3 may be both executed, or only one of them may be executed. When both step S3.5 and step S3 are executed, step S3 and step S3.5 are executed synchronously, and finally the liquid level of the detection solution on the inner side of the sample detection tube must be higher than the liquid level of the detection solution on the outer side of the sample detection tube.

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