Power cable buffer layer defect detection equipment and detection method

Abstract

The invention discloses power cable buffer layer defect detection equipment and a detection method, and relates to the field of cables. The invention provides power cable buffer layer defect detection equipment which comprises a base, clamping mechanisms are fixedly connected to the two sides of the front surface of the base, and a supporting plate is fixedly connected to the side, perpendicular to the clamping mechanisms, of the front surface of the base. According to the invention, the position and state of the cable under different bending can be determined through the signal of the travel switch, so that information about the performance and defects of the cable is provided, and when the mechanical motion reaches a specified position, the travel switch sends the signal and can stop moving according to the signal, so that the bending rod is ensured to stop at a required position; according to the method, the stress condition of the cable under different bending degrees can be analyzed by observing the wrinkle condition of the back surface of the cable, so that various factors causing the defects of the buffer layer can be obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of cables, and in particular relates to a device and a method for detecting defects in a buffer layer of a power cable. Background Art

[0002] The cable buffer layer is an important layer in the cable structure. It is located between the conductor and the insulation layer. It is mainly to protect the cable insulation layer from external physical damage and chemical corrosion. The cable buffer layer defect influencing factor test refers to testing the buffer layer of the conductive cable to determine the factors that may affect the quality and performance of the buffer layer. Through these tests, the quality and performance of the buffer layer material can be tracked, potential defects can be discovered in time, and corresponding measures can be taken to ensure the quality and reliability of the cable.

[0003] The existing power cable buffer layer defect detection equipment can only test one influencing factor of the cable buffer layer, which is inefficient and cannot detect the relationship between two or more influencing factors, making it less practical. For example, the relationship between the degree of bending of the cable buffer layer and the defects caused by temperature on the buffer layer may be detected; At the same time, when the existing devices detect the bending resistance of the cable buffer layer, the back surface is more likely to have changes and problems different from the front surface, and these problems are easy to be ignored. If only the bending property of the front surface of the cable is observed, it is difficult to fully understand the true condition of the cable. Buffer layer defects may appear on the back surface of the cable, and these problems can be easily ignored by observing the bending condition of the front surface, resulting in potential problems not being discovered and solved in time.

[0004] To this end, the present invention provides a power cable buffer layer defect detection device and a detection method to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a power cable buffer layer defect detection device and a detection method to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a power cable buffer layer defect detection device, comprising a base, both sides of the front surface of the base are fixedly connected with a clamping mechanism, a side of the front surface of the base that is perpendicular to the clamping mechanism is fixedly connected with a support plate, the inner wall of the support plate is provided with a dual-axis motor, the output ends of the dual-axis motor are fixedly connected with a rotating rod, the ends of the two rotating rods away from the dual-axis motor are fixedly connected with a limiting ring, the inner wall of the support plate is provided with a limiting groove matching the size of the limiting ring, the outer walls of the two rotating rods are fixedly sleeved with a rotating gear, the inner wall of the support plate is provided with a groove matching the rotating gear, a rack matching the rotating gear is fixedly provided inside the groove, the rotating gear is meshed with the rack, the outer wall of the dual-axis motor away from the support plate is fixedly connected with a bending rod, the outer wall of the bending rod is fixedly connected with the limiting mechanism, and the limiting mechanism is connected to the inner wall of the support plate.

[0007] Preferably, the limiting mechanism includes a slide groove, the slide groove is fixedly opened on the inner wall of the support plate, a sliding block is slidably connected to the inside of the slide groove, the outer wall of the bending rod is fixedly connected to the limiting plate, the inner wall of the limiting plate is fixedly connected to a buffer spring, the end of the buffer spring away from the limiting plate is fixedly connected to a movable plate, the end of the bending rod away from the movable plate is slidably connected to a baffle, the limiting plate and the movable plate are both sleeved on the outer wall of the bending rod, the baffle is slidably connected to the front surface of the base, the front surface of the base is provided with a sliding groove, and the inner sliding groove The rotatable plate is rotatably connected to the sliding block, the sliding block is fixedly connected to the baffle, a moving groove is opened on the surface of the baffle, the bending rod moves inside the moving groove, the outer wall of the sliding block is fixedly connected to a fixing rod, the end of the fixing rod away from the sliding block is hinged to a limiting rod, the end of the limiting rod away from the fixing rod is fixedly connected to the inner wall of the baffle, the outer walls of the two rotating rods are fixedly sleeved with fixing blocks, the front surface of the fixing block is fixedly connected to an L-shaped push rod, and the end of the L-shaped push rod away from the fixing block is fixedly connected to the outer wall of the sliding block.

[0008] Preferably, the clamping mechanism includes a vertical fixed plate, which is fixedly connected to both sides of the front surface of the base, and a transverse cavity is opened on the two vertical fixed plates, and two arc plates are slidably connected to the two transverse cavities, and the inner ends of the two arc plates are fixedly connected to a temperature control curved plate, and the opposite side of the temperature control curved plate is fixedly connected to an anti-slip pattern.

[0009] Preferably, the inner wall of the support plate is provided with a plurality of mounting grooves, and travel switches are fixedly arranged inside the plurality of mounting grooves, and the travel switches are electrically connected to the dual-axis motor.

[0010] Preferably, a rubber plate is fixedly connected to the outer wall of the front surface of the bending rod, a plurality of raised touch balls are movably connected to the front surface of the rubber plate, a plurality of holes matching the raised touch balls are opened on the surface of the rubber plate, and the plurality of raised touch balls are movably connected to the inside of the rubber plate.

[0011] Preferably, a fixing plate is fixedly connected to the front surface of the support plate, and one end of the fixing plate in contact with the baffle is fixedly provided with a sliding groove and a sliding block which are the same as those opened on the surface of the base.

[0012] Preferably, one end of the bending rod is fixedly connected to a temperature control component, the back surface of the base is provided with anti-slip grooves, and the outer end of the bending rod is fixedly connected to a lighting component.

[0013] A method for detecting defects in a power cable buffer layer comprises the following steps: S1: Pass the cable through the cross cavity and place it on the front surface of the bending rod, and then limit the cable by the clamping mechanism. S2: First, the dual-axis motor drives the bending rod to move upward continuously, and the dual-axis motor is stopped by the travel switch. The specific bending angles that cause buffer layer defects due to different bending degrees at the same temperature can be obtained. S3: When the cable is pulled upward, the limit plate and baffle are used to assist in blocking the cable to prevent the cable from falling off when it is pulled upward. S4: Then, the temperature control component is opened separately to heat the cable buffer layer and observe the changes on the surface of the cable buffer layer, so as to detect the influence of the buffer layer defects caused by different temperatures at the same bending degree of the cable buffer layer. S5: Then, the relationship between the bending degree of the cable and the temperature on the defects of the cable buffer layer is tested. The bending rod is heated while the cable is pulled up, and the wrinkles on the back surface of the cable caused by bending and temperature changes are recorded and observed through several raised touch balls on the rubber plate. Beneficial Effects

[0014] The present invention provides a power cable buffer layer defect detection device and a detection method. Compared with the prior art, it has the following beneficial effects: The stop of the bending rod at a specific position can be detected by the travel switch, and the different degrees of bending can be recorded and observed. The signal of the travel switch can be used to determine the position and state of the cable under different bends, thereby providing information about the cable performance and defects. The time relay can automatically control the opening of the dual-axis motor after the dual-axis motor stops according to the preset time parameters, ensuring that the bending rod stops at the required position to ensure the accuracy and reliability of the test results. By observing the wrinkles on the back surface of the cable, the stress conditions of the cable under different bending degrees can be analyzed, thereby obtaining the bending angle that will cause defects in the buffer layer, and determining the degree of bending that may cause defects in the buffer layer.

[0015] By setting up a lighting component to continuously illuminate the space between the bending rod and the back surface of the bent cable, the light and shadow projected onto the surface of the support plate are observed and recorded, and then the wrinkles on the back surface of the cable are observed, and this height is recorded as the limit bending height. In conjunction with the travel switch, the data of the cable bending conditions at different heights before the limit bending height are recorded to further understand the effect of the bending degree on the cable buffer layer, and the stress conditions of the cable under different bending degrees can be analyzed. The analysis can be performed from the front and back surfaces of the cable buffer layer, making the analyzed and recorded data more comprehensive and detailed.

[0016] By setting up different performances of the cable buffer layer under different bending degrees of the cable, the limit bending degree at which the measured bending degree causes defects to the cable buffer layer is obtained, and the limit heat resistance temperature at which the cable buffer layer causes defects is obtained by heating the temperature control component. By controlling variables, the specific temperatures at which the buffer layer defects are caused by different temperatures under the same bending degree can be obtained, and the specific bending angles at which the buffer layer defects are caused by different bending degrees at the same temperature can also be obtained, so that the detectable range of the device is improved, and the corresponding temperature and bending degree can be controlled according to the needs to obtain the relationship between the two, so as to better detect the specific data of the influencing factors causing defects in the cable buffer layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the power cable buffer layer defect detection device provided by the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the power cable buffer layer defect detection device provided by the present invention from another angle; Figure 3 It is a schematic diagram of the three-dimensional structure of part A of the power cable buffer layer defect detection device provided by the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the power cable buffer layer defect detection device provided by the present invention from another angle; Figure 5It is a schematic diagram of the three-dimensional structure of part B of the power cable buffer layer defect detection device provided by the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the power cable buffer layer defect detection device provided by the present invention from another angle; Figure 7 It is a schematic diagram of the three-dimensional structure of the C part of the power cable buffer layer defect detection device provided by the present invention; Figure 8 It is a partial three-dimensional structural schematic diagram of the power cable buffer layer defect detection device provided by the present invention.

[0018] In the figure: 1 base, 2 clamping mechanism, 21 vertical fixed plate, 22 cross cavity, 23 arc plate, 24 temperature control curved plate, 3 support plate, 4 dual-axis motor, 5 rotating rod, 6 limit ring, 7 limit groove, 8 rotating gear, 9 groove, 10 rack, 11 bending rod, 110 slide groove, 111 slider, 112 limit plate, 113 buffer spring, 114 movable plate, 115 baffle, 116 sliding groove, 117 sliding block, 118 moving groove, 119 fixed rod, 1110 limit rod, 1111 fixed block, 1112 L-shaped push rod, 12 limit mechanism, 13 installation groove, 14 travel switch, 15 rubber plate, 16 raised touch ball, 17 fixed plate, 18 temperature control component, 19 lighting component. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0020] See also Figure 1-3The power cable buffer layer defect detection device comprises a base 1, both sides of the front surface of the base 1 are fixedly connected with a clamping mechanism 2, a side of the front surface of the base 1 perpendicular to the clamping mechanism 2 is fixedly connected with a support plate 3, a dual-axis motor 4 is arranged on the inner wall of the support plate 3, a rotating rod 5 is fixedly connected to the output end of the dual-axis motor 4, and the ends of the two rotating rods 5 away from the dual-axis motor 4 are fixedly connected with a limiting ring 6, a limiting groove 7 matching the size of the limiting ring 6 is provided on the inner wall of the support plate 3, a rotating gear 8 is fixedly sleeved on the outer walls of the two rotating rods 5, a groove 9 matching the rotating gear 8 is provided on the inner wall of the support plate 3, a rack 10 matching the rotating gear 8 is fixedly arranged inside the groove 9, the rotating gear 8 is meshed and connected with the rack 10, and the dual-axis motor 4 is away from the support plate 3. A bending rod 11 is fixedly connected to the outer wall of one side, and the outer wall of the bending rod 11 is fixedly connected to a limiting mechanism 12. The limiting mechanism 12 is connected to the inner wall of the support plate 3. The dual-axis motor 4 can provide power to drive the rotation of the rotating gear 8, thereby driving the operation of the entire device. The dual-axis motor 4 has the characteristics of fast start-up and stable speed, and can provide stable power output. The dual-axis motor 4 can drive the meshing connection between the rotating gear 8 and the rack 10 to realize the movement of the bending rod 11. Through the movement of the rotating gear 8 on the rack 10, the bending rod 11 can be moved upward horizontally to apply a bend to the cable. This mechanical linkage design can make the device have higher rotation accuracy and stability. The bending rod 11 plays the role of connecting the cable and the device, and realizes the bending of the cable by moving upward horizontally. Embodiment 2

[0021] See also Figure 2-8This embodiment provides a technical solution based on the first embodiment: the limiting mechanism 12 includes a slide groove 110, the slide groove 110 is fixedly opened on the inner wall of the support plate 3, the slide groove 110 is slidably connected to the slider 111, the outer wall of the bending rod 11 is fixedly connected to the limiting plate 112, the inner wall of the limiting plate 112 is fixedly connected to the buffer spring 113, the end of the buffer spring 113 away from the limiting plate 112 is fixedly connected to the movable plate 114, and the bending rod 11 is away from the movable plate 114. The baffle plate 115 is slidably connected to one end of the folding rod 14, the limit plate 112 and the movable plate 114 are both sleeved on the outer wall of the bending rod 11, the baffle plate 115 is slidably connected to the front surface of the base 1, the front surface of the base 1 is provided with a sliding groove 116, the interior of the sliding groove 116 is slidably connected to a sliding block 117, the sliding block 117 is fixedly connected to the baffle plate 115, the surface of the baffle plate 115 is provided with a moving groove 118, the bending rod 11 moves inside the moving groove 118, and the outer wall of the slider 111 A fixed rod 119 is fixedly connected, and one end of the fixed rod 119 away from the slider 111 is hinged to a limiting rod 1110, and one end of the limiting rod 1110 away from the fixed rod 119 is fixedly connected to the inner wall of the baffle 115, and the outer walls of the two rotating rods 5 are fixedly sleeved with a fixed block 1111, and the front surface of the fixed block 1111 is fixedly connected to an L-shaped push rod 1112, and one end of the L-shaped push rod 1112 away from the fixed block 1111 is fixedly connected to the outer wall of the slider 111, through the slide groove 1 10. The limit plate 112, the buffer spring 113, the movable plate 114, the baffle 115, the limit rod 1110 and other components are combined. The limit mechanism 12 can limit the movement range of the bending rod 11. During the cable bending process, the stable movement of the bending rod 11 is ensured to prevent unstable movement from causing inaccurate test results. The design of the limit plate 112, the buffer spring 113, the movable plate 114 and the baffle 115 and other components can protect the cable from being fixed on the bending rod 11.

[0022] The clamping mechanism 2 includes an upright fixing plate 21, which is fixedly connected to both sides of the front surface of the base 1. A cross cavity 22 is provided on the two upright fixing plates 21. Two arc plates 23 are slidably connected to the two cross cavities 22. The inner ends of the two arc plates 23 are fixedly connected to a temperature control curved plate 24. The opposite side of the temperature control curved plate 24 is fixedly connected to an anti-slip pattern. Through the design of the arc plate 23, baffle 115, fixed block 1111 and other components in the clamping mechanism 2, the cable can be effectively fixed to prevent the cable from being offset or falling off during the bending process. At the same time, the protrusion on the temperature control curved plate 24 can heat the protective cover of the cable to improve the reliability and wear resistance of the cable, and can also make the temperature distribution more uniform when the temperature of the cable changes. The anti-slip pattern on the arc plate 23 can increase the friction between the arc plate 23 and the cable to ensure that the cable is firmly fixed in the clamping mechanism 2.

[0023] The inner wall of the support plate 3 is provided with a plurality of mounting grooves 13, and a travel switch 14 is fixedly arranged inside the plurality of mounting grooves 13. The travel switch 14 is electrically connected to the dual-axis motor 4. The stopping of the bending rod 11 at a specific position can be detected through the travel switch 14, and the different degrees of bending can be recorded and observed. The position and state of the cable under different bending can be determined through the signal of the travel switch 14, so as to provide information about the performance and defects of the cable. When the mechanical movement reaches the specified position, the travel switch 14 will send a signal. When the dual-axis motor 4 rises to each set height, it gradually contacts each travel switch 14. The travel switch 14 is a device that can detect the position of the mechanical movement. , install the travel switch 14 at a specific position of the mechanical system. When the mechanical movement reaches the specified position, the travel switch 14 will trigger a switch signal, which can be used to control the dual-axis motor 4 to stop moving. After that, the staff will observe and record the cracks and other defects that appear in the cable at this time. Then, through the time relay electrically connected to the dual-axis motor 4, the time relay can automatically control the opening of the dual-axis motor 4 after the dual-axis motor 4 stops according to the preset time parameters to ensure the accuracy and reliability of the test results. By observing the wrinkles on the back surface of the cable, the stress conditions of the cable under different bending degrees can be analyzed, thereby deriving various factors that cause buffer layer defects.

[0024] A rubber plate 15 is fixedly connected to the outer wall of the front surface of the bending rod 11, and a plurality of raised touch balls 16 are movably connected to the front surface of the rubber plate 15. A plurality of holes matching the raised touch balls 16 are opened on the surface of the rubber plate 15, and the plurality of raised touch balls 16 are movably connected to the inside of the rubber plate 15.

[0025] A fixing plate 17 is fixedly connected to the front surface of the support plate 3 , and a sliding groove 116 and a sliding block 117 which are the same as those on the surface of the base 1 are fixedly provided at one end of the fixing plate 17 which contacts the baffle 115 .

[0026] One end of the bending rod 11 is fixedly connected to a temperature control assembly 18 , the back surface of the base 1 is provided with anti-slip grooves, and the outer end of the bending rod 11 is fixedly connected to a lighting assembly 19 .

[0027] A method for detecting defects in a power cable buffer layer comprises the following steps: S1: Pass the cable through the cross cavity 22 and place it on the front surface of the bending rod 11, and then limit the cable by the clamping mechanism 2. S2: First, the bending rod 11 is driven to move upward continuously by the double-axis motor 4, and the double-axis motor 4 is stopped by the travel switch 14, so that the specific bending angles causing buffer layer defects at different bending degrees at the same temperature can be obtained. S3: While pulling the cable upward, the limit plate 112 and the baffle plate 115 are used to assist in blocking the cable to prevent the cable from falling off when pulling it upward. S4: Then, the temperature control component 18 is opened separately to heat the cable buffer layer, and the changes on the surface of the cable buffer layer are observed, so as to detect the influence of the buffer layer defects caused by different temperatures at the same bending degree of the cable buffer layer. S5: Then, the influence relationship between the bending degree of the cable and the temperature on the cable buffer layer defects is detected. The bending rod 11 is heated while the cable is pulled up, and then the wrinkles on the back surface of the cable caused by bending and temperature changes are recorded and observed through several raised touch balls 16 on the rubber plate 15.

[0028] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0029] During operation, the staff first passes the cable to be tested through the two cross cavities 22 respectively, and completes the cable limiting treatment in the two cross cavities 22. The two groups of two arc plates 23 can be used to limit the two points of the cable. The two groups of two arc plates 23 are provided with anti-slip patterns, which can increase the friction between the two groups of two arc plates 23 and the cable. Then the double-axis motor 4 is started to drive the rotating rod 5 at the output ends to rotate, and the rotating gear 8 is meshed with the rack 10. The rotation of the rotating rod 5 can drive the rotating gear 8 to move on the rack 10, so that the bending rod 11 can move upward horizontally. Since the L-shaped push rod 1112 and the slider 111 slide horizontally upward in the slide groove 110, the bending rod 11 can be driven. The rod 11 slides upward horizontally in the moving groove 118, and the limiting rod 1110 and the fixed rod 119 can synchronously adjust the distance between the baffle 115 and the support plate 3 according to the sliding height of the slider 111 in the sliding groove 110. The meshing connection between the rack 10 and the rotating gear 8 may not be stable enough when rotating. At this time, the limiting groove 7 and the limiting ring 6 can be set. When the dual-axis motor 4 drives the rotating gear 8 to rotate and drive the bending rod 11 to move upward, the rotating rod 5 can be limited to prevent the unstable rotating rod 5 from causing unstable test results when the cable is bent. The rotating gear 8 is synchronously linked with the rack 10, and the rotation accuracy and stability are improved through the meshing of gear teeth, which effectively reduces the vibration and noise generated by the operation of the equipment. When the middle position of the cable is pulled upward, the middle position of the cable buffer layer is pulled higher and higher, and the cable may deviate or fall off. The cable is placed between the baffle 115 and the movable plate 114 through the limit plate 112, buffer spring 113, movable plate 114 and baffle 115 fixedly connected to the surface of the bending rod 11. When the cable is pulled up and the degree of bending increases, the cable may fall outward or slide inward on the bending rod 11. If the cable slides inward, the cable contacts the movable plate 114, the movable plate 114 slides on the bending rod 11, and the movable plate 114 contacts the buffer spring 113. The buffer spring 113 is subjected to the force of the movable plate 114 and can approach the limit plate 112 fixedly connected to the bending rod 11, so that the buffer spring 113 connected to the movable plate 114 The cable can be protected to a certain extent. At the same time, if the cable deviates outward, the baffle 115 can play a certain auxiliary blocking role, the cable will not fall off, and the position of the cable can be helped to prevent it from falling off. When the dual-axis motor 4 moves upward through the rotation of the rack 10 and the rotating gear 8, the fixed block 1111 can move upward through the rotating rod 5. The L-shaped push rod 1112 on the front surface of the fixed block 1111 pushes the slider 111 to slide upward in the slide groove 110. The upward sliding of the slider 111 can enable the fixed rod 119 to drive the limiting rod 1110 to rotate. The rotation of the limiting rod 1110 can enable the baffle 115 to slide inside the sliding groove 116 during the continuous upward movement of the bending rod 11. Since the side of the bending rod 11 away from the output end of the dual-axis motor 4 is connected to the baffle 115, the baffle 115 is not in contact with the baffle 115. The outer wall of the cable is slidably connected, so when the dual-axis motor 4 is started, the bending rod 11 can be prevented from being unevenly stressed, and at the same time, the bending rod 11 can be driven to move horizontally upward, and it can adapt to cables of various sizes. The higher the slider 111 is, the closer the limit rod 1110 and the fixed rod 119 can make the baffle 115 closer to the cable for limiting. At the same time, the buffer spring 113 can relax the cable when the baffle 115 is close. When the cable is pulled up and the bending degree increases, the movable plate 114 can slide and contact the buffer spring 113, so that when the cable is limited, the buffer spring 113 can play a role to prevent the excessive limiting force from affecting the cable. Then, the temperature control component 18 is opened separately to heat the cable buffer layer until the surface of the cable buffer layer is significantly deformed. At this time, we record the temperature as the ultimate heat-resistant temperature of the cable buffer layer; Afterwards, the relationship between the bending degree of the cable and the temperature is tested: when the bending resistance of the cable buffer layer is tested at normal room temperature, travel switches 14 are set in multiple installation slots 13 during the upward process of the bending rod 11. When the dual-axis motor 4 rises to the set heights, it gradually contacts each travel switch 14. The travel switch 14 is a device that can detect the position of mechanical movement. The travel switch 14 is installed at a specific position of the mechanical system. When the mechanical movement reaches the specified position, the travel switch 14 will trigger a switch signal. Through this signal, the dual-axis motor 4 can be controlled to stop moving. After that, the staff will observe and record the cracks and other defects of the cable at this time, and then through the time relay electrically connected to the dual-axis motor 4, the time relay can detect the position of the dual-axis motor according to the preset time parameters. After the machine 4 stops, the dual-axis motor 4 is automatically controlled to start. After the dual-axis motor 4 drives the rotating rod 5 to move upward for a certain period of time, when obvious cracks begin to appear on the front surface of the cable, the lighting assembly 19 set at the end of the bending rod 11 can continuously illuminate the space between the bending rod 11 and the bent back surface of the cable, and observe and record the light and shadow projected onto the surface of the support plate 3, and then observe the wrinkles on the back surface of the cable, and record this height as the limit bending height. In conjunction with the travel switch 14, the data of the cable bending conditions at different heights before the limit bending height can be recorded to further understand the influence of the bending degree on the cable buffer layer, and the stress conditions of the cable under different bending degrees can be analyzed, and the analysis can be performed from the front and back surfaces of the cable buffer layer, so that the analyzed and recorded data are more comprehensive and detailed; When it is necessary to detect the effect of temperature on the cable buffer layer, the staff starts the temperature control component 18 fixedly connected to the front surface of the bending rod 11, and starts the temperature control component 18 to control the temperature of the bending rod 11. Through observation and recording, it is found that when the temperature is lower than the normal room temperature, when the limit bending height is reached, cracks appear faster and more easily. When the temperature is higher than the normal room temperature, the hardness of the cable becomes lower when the cable is at the limit bending height, and the cracks on the front surface are less, and the back surface of the cable is more likely to have wrinkles. The stress conditions of the cable at different temperature levels can be analyzed, and the front and back surfaces of the cable buffer layer can be analyzed. Analysis makes the analyzed and recorded data more comprehensive and detailed; at the same time, the wrinkles on the back surface of the cable caused by bending and temperature changes can be assisted in recording and observing through a number of raised touch balls 16. At the same time, the inner end faces of the multiple temperature control curved plates 24 in the clamping mechanism 2 are all provided with multiple protrusions. The multiple temperature control curved plates 24 have a heating function. When the cable is fixed by two groups of two arc-shaped plates 23, the multiple temperature control curved plates 24 are driven to move inward, so that the multiple temperature control curved plates 24 are in contact with the cable, and the heating function of the multiple temperature control curved plates 24 is activated, which can assist in heating both ends of the cable and make the temperature distribution more uniform; The power cable buffer layer defect detection equipment and detection method obtain the limit bending degree of the cable buffer layer caused by the measured bending degree through the different performances of the cable buffer layer under different bending degrees of the cable, and obtain the limit heat resistance temperature of the cable buffer layer caused by the defects through the heating of the temperature control component 18, and obtain the specific temperature of the buffer layer caused by different temperatures under the same bending degree through the method of controlling variables, and can also obtain the specific bending angle of the buffer layer caused by different bending degrees under the same temperature, so that the detection range of the device is improved, and the corresponding temperature and bending degree can be controlled according to the needs to obtain the relationship between the two, so as to better detect the specific data of the influencing factors causing the cable buffer layer defects.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Power cable buffer layer defect detection equipment, characterized by: The invention comprises a base (1), both sides of the front surface of the base (1) are fixedly connected to clamping mechanisms (2), a side of the front surface of the base (1) perpendicular to the clamping mechanism (2) is fixedly connected to a support plate (3), the inner wall of the support plate (3) is provided with a dual-axis motor (4), the output ends of the dual-axis motor (4) are fixedly connected to rotating rods (5), the ends of the two rotating rods (5) away from the dual-axis motor (4) are fixedly connected to limiting circular rings (6), the inner wall of the support plate (3) is provided with limiting grooves (7) matching the size of the limiting circular rings (6), and the two rotating rods The outer wall of each of the two-axis motors (4) is fixedly sleeved with a rotating gear (8), the inner wall of the support plate (3) is provided with a groove (9) matching the rotating gear (8), the interior of the groove (9) is fixedly provided with a rack (10) matching the rotating gear (8), the rotating gear (8) is meshingly connected with the rack (10), the outer wall of the two-axis motor (4) away from the support plate (3) is fixedly connected with a bending rod (11), the outer wall of the bending rod (11) is fixedly connected with a limiting mechanism (12), and the limiting mechanism (12) is connected to the inner wall of the support plate (3).

2. The power cable buffer layer defect detection device according to claim 1, characterized in that: The limiting mechanism (12) comprises a slide groove (110), wherein the slide groove (110) is fixedly opened on the inner wall of the support plate (3), a slider (111) is slidably connected inside the slide groove (110), an outer wall of the bending rod (11) is fixedly connected to a limiting plate (112), an inner wall of the limiting plate (112) is fixedly connected to a buffer spring (113), an end of the buffer spring (113) away from the limiting plate (112) is fixedly connected to a movable plate (114), an end of the bending rod (11) away from the movable plate (114) is slidably connected to a baffle (115), the limiting plate (112) and the movable plate (114) are both sleeved on the outer wall of the bending rod (11), the baffle (115) is slidably connected to the front surface of the base (1), a sliding groove (116) is opened on the front surface of the base (1), and the sliding groove (116) is slidably connected to the inside A sliding block (117), wherein the sliding block (117) is fixedly connected to the baffle (115), a movable groove (118) is provided on the surface of the baffle (115), the bending rod (111) moves inside the movable groove (118), the outer wall of the sliding block (111) is fixedly connected to a fixing rod (119), one end of the fixing rod (119) away from the sliding block (111) is hingedly connected to a limiting rod (1110), one end of the limiting rod (1110) away from the fixing rod (119) is fixedly connected to the inner wall of the baffle (115), the outer walls of the two rotating rods (5) are both fixedly sleeved with fixing blocks (1111), the front surface of the fixing block (1111) is fixedly connected to an L-shaped push rod (1112), and one end of the L-shaped push rod (1112) away from the fixing block (1111) is fixedly connected to the outer wall of the sliding block (111).

3. The power cable buffer layer defect detection device according to claim 2 is characterized in that: The clamping mechanism (2) comprises a vertical fixing plate (21), the vertical fixing plate (21) being fixedly connected to both sides of the front surface of the base (1), the two vertical fixing plates (21) being provided with a transverse cavity (22), the two transverse cavities (22) being slidably connected to two arc-shaped plates (23), the inner ends of the two arc-shaped plates (23) being fixedly connected to a temperature control curved plate (24), and the opposite side of the temperature control curved plate (24) being fixedly connected to an anti-slip pattern.

4. The power cable buffer layer defect detection device according to claim 3 is characterized in that: The inner wall of the support plate (3) is provided with a plurality of mounting grooves (13), and travel switches (14) are fixedly arranged inside the plurality of mounting grooves (13), and the travel switches (14) are electrically connected to the dual-axis motor (4).

5. The power cable buffer layer defect detection device according to claim 4, characterized in that: A rubber plate (15) is fixedly connected to the outer wall of the front surface of the bending rod (11); a plurality of raised touch balls (16) are movably connected to the front surface of the rubber plate (15); a plurality of holes matching the raised touch balls (16) are opened on the surface of the rubber plate (15); and the plurality of raised touch balls (16) are movably connected to the inside of the rubber plate (15).

6. The power cable buffer layer defect detection device according to claim 5, characterized in that: A fixing plate (17) is fixedly connected to the front surface of the support plate (3); an end of the fixing plate (17) in contact with the baffle (115) is fixedly provided with a sliding groove (116) and a sliding block (117) which are the same as those provided on the surface of the base (1).

7. The power cable buffer layer defect detection device according to claim 6, characterized in that: One end of the bending rod (11) is fixedly connected to a temperature control component (18), the back surface of the base (1) is provided with anti-slip grooves, and the outer end of the bending rod (11) is fixedly connected to a lighting component (19).

8. A method for detecting defects in a power cable buffer layer, applied to the power cable buffer layer defect detection device as claimed in claim 7, characterized in that: The steps include: S1: Pass the cable through the cross cavity (22) and place it on the front surface of the bending rod (11), and then limit the cable by the clamping mechanism (2). S2: First, the bending rod (11) is driven to move upward continuously by the double-axis motor (4), and the double-axis motor (4) is stopped by the travel switch (14). The specific bending angles causing the buffer layer defects due to different bending degrees at the same temperature can be obtained. S3: While the cable is being pulled upward, the limit plate (112) and the baffle plate (115) are used to assist in blocking the cable, thereby preventing the cable from falling off when being pulled upward. S4: Then, the temperature control component (18) is opened separately to heat the cable buffer layer, and the changes on the surface of the cable buffer layer are observed, so as to detect the influence of the buffer layer defects caused by different temperatures at the same bending degree of the cable buffer layer. S5: Then, the relationship between the bending degree of the cable and the temperature on the defects of the cable buffer layer is tested. The bending rod (11) is heated while the cable is pulled upward, and the wrinkles on the back surface of the cable caused by bending and temperature changes are recorded and observed through a plurality of raised touch balls (16) on the rubber plate (15).

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