A performance testing system and method for flame-retardant cables used in coal mines

Abstract

The present invention discloses a flame retardant cable performance testing system and method for coal mines, which belongs to the technical field of cable flame retardant performance testing. In order to solve the problems of cumbersome cable fixing, inaccurate carbonization height measurement, and interference between cables caused by combustion affecting the flame retardant test results, a flame retardant cable performance testing system for coal mines in the present invention includes a flame retardant test box, wherein a burner is installed in the flame retardant test box, a controller is fixed to the side wall of the flame retardant test box, a lifting frame is provided for lifting and sliding in the flame retardant test box, a rotating rod is rotatably connected in the flame retardant test box, the side wall of the flame retardant test box is fixedly connected to a driving machine, a test frame is fixedly sleeved on the rotating rod, a fixed column is fixed on the test frame, a plurality of sliding columns are slidably connected to the test frame, and the bottom surfaces of the plurality of sliding columns are fixedly connected to a clamping seat. The present invention facilitates cable fixing before testing, there is no interference during testing, and the test results are accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of cable flame retardant performance testing, in particular to a flame retardant cable performance testing system and method for coal mines. Background Art

[0002] In the coal mining industry, the performance of flame-retardant cables is directly related to the safety and stability of coal mine production. With the continuous development of coal mining technology and the increasing requirements for safe production, the performance testing of flame-retardant cables for coal mines has become increasingly important.

[0003] In the current flame retardant test of flame retardant cables for coal mines, the commonly used test method is to first fix the cable, then burn it with the help of a burner. After the burning is completed, the carbonization height of the cable is measured with a distance meter, which is used as the basis for judging the flame retardant performance of the cable.

[0004] However, in the prior art, when fixing cables, workers mostly perform complex positioning and binding and fixing them one by one, which not only consumes a lot of time and energy but also increases labor intensity. When using a rangefinder to measure the carbonization height of the cable, since the cable may break during the combustion process, it is difficult to accurately measure the carbonization height of these broken parts, resulting in deviations in the test results and an inability to truly and accurately reflect the actual flame retardant performance of the cable. Moreover, during the test process, the test frame may have angular deviations due to various reasons such as mechanical vibration and wear caused by long-term use. Once the angle of the test frame is offset, it will directly affect the horizontal state of measuring equipment such as the infrared rangefinder, thereby causing measurement errors and making it difficult to ensure the accuracy of the measurement results. Moreover, when performing synchronous testing on multiple cables, it is impossible to effectively prevent the residual flames of other burning cables from interfering with the cable being tested. These residual flames may continue to burn the cable being tested, resulting in the measured carbonization height not being able to truly reflect the flame retardant performance of the cable itself, reducing the credibility of the test results and failing to provide a reliable reference basis for the actual application of the cable.

[0005] In response to the above problems, a flame retardant cable performance testing system and method for coal mines are proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a flame-retardant cable performance testing system and method for coal mines. By adopting the present invention, the problems in the above background such as cumbersome cable fixing, inaccurate carbonization height measurement, and interference between combustion between cables affecting the flame retardant test results are solved.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a flame-retardant cable performance testing system for coal mines, comprising a flame-retardant test box, a burner installed in the flame-retardant test box, a controller fixed to the side wall of the flame-retardant test box, a lifting frame slidingly lifting in the flame-retardant test box, an auxiliary plate clamped and installed on the lifting frame, a cable body clamped in the auxiliary plate, a rotating rod rotatably connected in the flame-retardant test box, a driving machine fixedly connected to the side wall of the flame-retardant test box, an output end of the driving machine fixedly connected to the rotating rod, a test frame fixedly sleeved on the rotating rod, a fixed column fixed on the test frame, a plurality of sliding columns slidably connected to the test frame, and a clamping seat fixedly connected to the bottom surface of each of the plurality of sliding columns;

[0008] Also includes:

[0009] A loading assembly, which facilitates loading the cable body;

[0010] An adjustment component is provided, wherein the adjustment component is convenient for driving the plurality of sliding posts to slide synchronously to adjust the spacing, and the adjustment component comprises: a fixed block, the fixed block is fixedly connected to the side wall of the fixed post, the side wall of the fixed block is fixedly connected to a first motor, an output end of the first motor is fixedly connected to a threaded rod, a connecting block is threadedly sleeved on the threaded rod, the connecting block is fixedly connected to the sliding post close to the side wall of the flame retardant test box, the sliding post and the side wall of the fixed post are fixedly connected to a convex rod, a plurality of the convex rods are hingedly connected to a scissor-type connecting rod, and a plurality of telescopic blocking plates are hingedly installed at the hinge below the scissor-type connecting rod;

[0011] A test assembly is provided, which facilitates measuring the carbonization height of the cable body after the flame retardant test. The test assembly includes a fixed seat, which is fixed to the inner wall of the flame retardant test box. A screw is rotatably connected to the fixed seat. A second motor is fixedly connected to the side wall of the flame retardant test box. The output end of the second motor is fixedly connected to the screw. A slide is threadedly connected to the screw, and an infrared rangefinder is fixedly installed on the surface of the slide;

[0012] A calibration assembly facilitates calibration of the test frame, comprising a connecting frame, the connecting frame being fixedly connected to the top surface of the fixing seat, an accommodating column being fixedly connected to the end of the connecting frame, a cavity being defined in the accommodating column, a spring being fixedly connected in the accommodating column, the other end of the spring being fixedly connected to a rubber resistance rod, a side wall of the sliding column being fixedly connected to a resistance block, the rubber resistance rod being in contact with the resistance block;

[0013] The clamping assembly is convenient for clamping and fixing the cable body. The clamping assembly includes a special-shaped frame, which is fixed to the side walls of two sliding columns on opposite sides. One end of the special-shaped frame side wall is fixedly connected to a third motor, and the output end of the third motor is fixedly connected to a rotating rod, a double-headed screw is clamped on the rotating rod, and a sliding block is symmetrically threaded on the double-headed screw, and the sliding block is fixedly connected to an L-shaped frame, and a splint is fixedly connected to the end of the L-shaped frame, and a chip sensor is fixedly installed on the inner wall of the clamping seat.

[0014] Furthermore, the feeding assembly includes:

[0015] A notch is provided on the side walls on opposite sides of the flame retardant test box. The side walls of the flame retardant test box are fixedly connected with an electric telescopic column. The output end of the electric telescopic column is fixedly connected with a slider, and the slider is slidably connected to the notch.

[0016] Furthermore, the test components are provided in two groups.

[0017] Furthermore, two of the sliding blocks, L-shaped frames and clamping plates are symmetrically arranged about the axis of the clamping seat, and the inner walls of the two clamping plates are clamped and fitted with the outer wall of the cable body.

[0018] Furthermore, the double-headed screws are arranged in a number corresponding to the clamping seats.

[0019] Furthermore, the controller is electrically connected to the burner, the driving machine, the first motor, the second motor, the third motor, the infrared rangefinder and the chip sensor.

[0020] The present invention also proposes another technical solution: a test method applied to a flame-retardant cable performance test system for coal mines, comprising the following steps:

[0021] S1: Cable spacing adjustment: The adjustment component controls multiple slides to drive the clamping base to move horizontally synchronously, thereby adjusting the spacing between them to suit the cable specifications. At the same time, multiple telescopic baffles are synchronously extended and retracted as the slides adjust the spacing, keeping them in the appropriate position.

[0022] S2: Cable loading: After the staff arranges the cable body adaptively, they move it to the designated position through the loading assembly. The cable body is then fed into the clamping seat to achieve rapid loading of the cable body.

[0023] S3: Cable fixing. When the cable body enters the clamping seat, the third motor is started to drive the rotating rod to drive multiple double-headed screws to rotate, so that the two sliding blocks, L-shaped frame and clamping plate on the double-headed screw move symmetrically towards each other, thereby clamping the cable body, realizing the synchronous clamping and fixing of multiple groups of cable bodies;

[0024] S4: Cable flame retardant test, start the burner, the burner produces a stable flame, and performs a combustion test on the cable body. During the test, the driving motor is started to rotate the rotating rod, causing the test frame on the rotating rod to rotate, so as to simulate the flame retardancy of the cable at different angles and more comprehensively test the flame retardancy of the cable;

[0025] S5: Cable carbonization height measurement: The second motor drives the lead screw to rotate and drive the external slide to move horizontally. The infrared rangefinder moves horizontally synchronously to accurately measure the height of the unburned cable body itself and the vertical height between the cable body and the bottom of the flame retardant test chamber.

[0026] S6: Measurement and calibration: Start the driving motor to rotate the rotating rod and the test frame. The squeezing distance between the friction block and the rubber friction rod is used to determine whether the test frame and the friction block are in a vertical state. Ensure that the infrared rangefinder and the test frame are in an ideal state of absolute horizontality to avoid angle differences affecting the measurement accuracy.

[0027] S7: Calculate and measure the carbonization height of the cable. The slide and the infrared rangefinder on its surface are driven to move horizontally again. The infrared rangefinder measures the carbonization height of the cable body after combustion. The controller accurately calculates the initial recorded cable body height data and the currently measured residual height data to obtain the carbonization height of the cable body.

[0028] S8: Measurement data generation: The controller collects various data in real time during the test, such as temperature, time, and cable combustion conditions, and analyzes and processes them. Finally, a test report is generated to facilitate staff to view the flame retardant test data and evaluate the performance of flame retardant cables for coal mines.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention is simple to operate, does not require a complicated positioning process, saves work flow, and can accurately deliver the cable to a designated position for fixing when combined with a feeding component, saving labor intensity for workers; an infrared rangefinder is used to measure the carbonization height of the cable body before and after combustion, and the initial height data and the residual height data are accurately calculated by a controller, effectively avoiding the problem that the burned and broken part of the cable is difficult to measure, thereby improving the accuracy of the test results and making the obtained carbonization height data more truly reflect the flame retardant performance of the cable; through the use of the test component and the correction component, the skew problem of the test frame can be corrected quickly and effectively to ensure that it is always in the correct position, providing a reliable basic guarantee for subsequent accurate measurements; through the adjustment component, the test environment can be flexibly adjusted according to the specifications of different cables, so that the test system can adapt to the testing requirements of various flame retardant cables for coal mines, and during the flame retardant test, the telescopic barrier plate can always be in the appropriate position as adjusted to form a barrier, preventing the residual fire of the burning cable from spreading to the carbonized cable, effectively avoiding the interference of the residual fire, and making the test results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a schematic structural diagram of the feeding assembly of the present invention;

[0033] Figure 3 This is a schematic diagram of the installation structure of the auxiliary plate and the cable body of the present invention;

[0034] Figure 4 This is a diagram showing the internal structure of the flame retardant test box of the present invention;

[0035] Figure 5 It is a schematic structural diagram of the adjustment component and the clamping component of the present invention;

[0036] Figure 6 It is a schematic structural diagram of the clamping assembly of the present invention;

[0037] Figure 7 Schematic diagram of the test assembly and correction assembly structure of the present invention;

[0038] Figure 8 Schematic diagram of the correction component structure of the present invention.

[0039] In the figure: 1. Flame retardant test chamber; 2. Burner; 3. Controller; 4. Notch; 5. Lifting frame; 51. Electric telescopic column; 52. Slider; 6. Auxiliary plate; 7. Cable body; 8. Rotating rod; 81. Driving machine; 9. Test frame; 10. Fixed column; 11. Sliding column; 12. Adjustment assembly; 121. Fixed block; 122. First motor; 123. Threaded rod; 124. Connecting block; 125. Protruding rod; 126. Scissor-type connecting rod; 127. Telescopic baffle; 13. Test assembly; 13 1. Fixed seat; 132. Screw rod; 133. Second motor; 134. Slide seat; 135. Infrared rangefinder; 136. Calibration assembly; 361. Connecting frame; 362. Accommodating column; 363. Spring; 364. Rubber resistance rod; 365. Resistance block; 14. Clamping seat; 15. Clamping assembly; 151. Special-shaped frame; 152. Third motor; 153. Rotating rod; 154. Double-headed screw; 155. Sliding block; 156. L-shaped frame; 157. Clamping plate; 158. Sheet sensor. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0041] In order to solve the technical problem that the staff need to bundle the cables one by one when testing, such as Figure 1 - Figure 8 As shown, the following preferred technical solutions are provided:

[0042] A flame-retardant cable performance testing system for coal mines includes a flame-retardant test box 1, in which a burner 2 is installed. The flame-retardant test box 1 is intended to provide a closed space environment for the cable during flame-retardant testing. The flame-retardant test box 1 can effectively prevent the flame, smoke, etc. generated during the combustion process from spreading outward, thereby ensuring the safety of the test personnel and the stability of the test environment. The burner 2 can generate a stable flame, and its flame temperature, intensity and other parameters can be adjusted by a controller 3 to meet different test standards and requirements. The spray gun on the burner 2 can be adjusted in height to ensure that the flame can act evenly on the cable body 7, thereby accurately testing the flame retardant performance of the cable.

[0043] A controller 3 is fixed to the side wall of the flame retardant test chamber 1. The controller 3 integrates various control circuits and software programs, and can accurately control the working state of the burner 2, the speed of the driver 81, the extension and retraction of the electric telescopic column 51, etc. At the same time, the controller 3 can also collect various data during the test process in real time, such as temperature, time, and the combustion status of the cable, and analyze and process them, and finally generate a test report for the staff to view the flame retardant test data. A lifting frame 5 is installed in the flame retardant test chamber 1, which can be lifted and slid. An auxiliary plate 6 is fixed on the lifting frame 5. The auxiliary plate 6 is composed of two clamping plates with grooves. The groove design can play a preliminary role in positioning and arranging the cables, and the spacing of the grooves can be adaptively adjusted according to the adjusted spacing of the cables, so that the cables are more regular when placed. During the test, the staff only needs to arrange the cables, which saves work process. Since the auxiliary plate 6 is used to assist in loading and belongs to the known technology, it will not be described in detail. The cable body 7 is clamped in the auxiliary plate 6, and a rotating rod 8 is rotatably connected in the flame retardant test box 1. The side wall of the flame retardant test box 1 is fixedly connected to a driving machine 81, and the output end of the driving machine 81 is fixedly connected to the rotating rod 8. The rotating rod 8 is driven to rotate by the driving machine 81. A test frame 9 is fixedly sleeved on the rotating rod 8, and a fixed column 10 is fixed on the test frame 9. The rotation of the rotating rod 8 can drive the test frame 9 fixed thereon to rotate together, thereby realizing multi-angle testing of the cable body 7. When conducting a flame retardant test, the test frame 9 can be rotated to make the cable burn evenly by the flame, thereby improving the accuracy and reliability of the test results. A plurality of sliding columns 11 are slidably connected to the test frame 9, and the bottom surfaces of the plurality of sliding columns 11 are fixedly connected to a clamping seat 14. By synchronously moving the plurality of sliding columns 11 on the test frame 9, the spacing of the clamping seats 14 that can clamp the cable bodies 7 can be adjusted to avoid interference between residual fires between cables during subsequent combustion tests and thus affecting the test effect.

[0044] A flame-retardant cable performance testing system for coal mines also includes a loading assembly and a clamping assembly 15. The loading assembly facilitates loading the cable body 7, and the clamping assembly 15 facilitates clamping and fixing the cable body 7. The loading assembly includes a notch 4, which is provided on the opposite side walls of the flame-retardant test box 1. The notch 4 provides a guide and space for the sliding of a slider 52. The size and shape of the notch 4 match the slider 52 to ensure that the slider 52 does not deviate or get stuck during the sliding process. The side wall of the flame-retardant test box 1 is fixedly connected to an electric telescopic column 51, and the output end of the electric telescopic column 51 is fixedly connected to the slider 52. The slider 52 is slidably connected to the notch 4. The electric telescopic column 51 drives the slider 52 to slide in the notch 4 through a telescopic action. When the cable body 7 needs to be loaded, the electric telescopic column 51 extends, pushing the slider 52 to drive the cable body 7 installed through the auxiliary plate 6 to move into the clamping seat 14, thereby sending the cable body 7 into the designated position in the test box for clamping and fixing.

[0045] The clamping assembly 15 includes a special-shaped frame 151, which is fixed to the side walls of the two sliding columns 11 on opposite sides, and plays a role of connection and support. The side wall of the special-shaped frame 151 at one end is fixedly connected to the third motor 152, and the output end of the third motor 152 is fixedly connected to the rotating rod 153, and the rotating rod 153 is clamped with a double-headed screw 154. It should be noted that the outer wall of the rotating rod 153 is equipped with a clip, and the inner wall of the double-headed screw 154 is clamped with it. A clip groove is provided to match it, so that the double-headed screw 154 can move adaptively when the spacing is adjusted as the sliding column 11 is adjusted, avoiding the stability of the subsequent spacing adjustment. The double-headed screw 154 is symmetrically threaded with a sliding block 155, so that the two sliding blocks 155 can move symmetrically toward or away from each other on its surface, thereby realizing the clamping and loosening operation of the cable body 7. The sliding block 155 is fixedly connected to the L-shaped frame 156, and the end of the L-shaped frame 156 is fixedly connected to the splint. 157. A chip sensor 158 is fixedly installed on the inner wall of the clamping seat 14. The model of the chip sensor 158 is E3Z-LS63. The sensor uses the principle of reflected or diffuse reflection for perception. When the cable enters the clamping seat 14, the sensor can detect the signal change, thereby judging whether the cable is in place, and can quickly and accurately sense the entry of the cable. The bottom of the clamping seat 14 is horn-shaped, so that when pushing the cable to load, it can enter the clamping seat 14 more quickly and accurately for clamping and fixing. There are two sliding blocks 155, L-shaped frames 156 and clamps 157 symmetrically about the axis of the clamping seat 14. The inner walls of the two clamps 157 are clamped and fitted with the outer walls of the cable body 7. The double-headed screw 154 is set according to the number of clamping seats 14. The inner wall of the clamp 157 has anti-slip and wear-resistant properties, which can ensure that the cable body 7 will not slide during the test. At the same time, the material selection of the clamp 157 has high temperature resistance to adapt to the test environment.

[0046] Specifically, when conducting a flame retardant test on a cable, the staff first places the cable on an auxiliary plate 6 formed by two clamping plates with grooves for preliminary arrangement, and then starts the electric telescopic column 51. The electric telescopic column 51 begins to extend, and the slider 52 connected to its output end slides in the recess 4, thereby driving the lifting frame 5 to slide down to the bottom of the box. Then, the auxiliary plate 6 on which multiple cable bodies 7 are placed is inserted into the lifting frame 5, and then the electric telescopic column 51 is started again to perform a contraction action, thereby driving the lifting frame 5 and the cable body 7 to move upward. When it moves to the specified position, the cable body 7 is sent into the clamping seat 14 to be clamped and fixed. When the cable body 7 enters it, the chip sensor 158 will sense and judge. When the cable body 7 is in place The electrical signal will be transmitted to the third motor 152, and the third motor 152 will immediately receive the signal to start and drive the rotating rod 153 at the output end to drive multiple double-headed screws 154 to rotate. Under the rotation of the double-headed screw 154, the two sliding blocks 155 move symmetrically toward each other, and the L-shaped frame 156 fixedly connected to the sliding block 155 and the clamping plate 157 at the end also move accordingly, gradually clamping the cable body 7, so that multiple groups of cable bodies 7 are synchronously clamped and fixed, so that the cables can be quickly fixed and clamped, and the synchronous clamping and fixation of multiple groups of cable bodies 7 can be achieved without the need for staff to tie and fix them one by one. This not only greatly reduces the labor intensity of the staff, but also significantly improves work efficiency, so that the flame retardant test work can be carried out more quickly and efficiently.

[0047] In order to solve the technical problem that the cable will not be continuously burned by the remaining flames of other cables during the flame retardant test, thereby affecting the accuracy of the flame retardant test results, such as Figure 4 - Figure 6 As shown, the following preferred technical solutions are provided:

[0048] A flame retardant cable performance test system for coal mines includes an adjustment component 12, which is convenient for driving multiple sliding columns 11 to slide synchronously to adjust the spacing. The adjustment component 12 includes a fixed block 121, which is fixedly connected to the side wall of the fixed column 10. The side wall of the fixed block 121 is fixedly connected to a first motor 122, and the output end of the first motor 122 is fixedly connected to a threaded rod 123. A connecting block 124 is threadedly sleeved on the threaded rod 123. The connecting block 124 is fixed to the sliding column 11 near the side wall of the flame retardant test box 1 Fixed connection, the sliding column 11 and the side wall of the fixed column 10 are fixedly connected with a protruding rod 125, which plays the role of connection and support. A scissor-type connecting rod 126 is hingedly connected between multiple protruding rods 125. The scissor-type connecting rod 126 can achieve flexible extension and expansion when the sliding column 11 slides. When the sliding column 11 slides synchronously driven by the connecting block 124, the scissor-type connecting rod 126 will expand or contract accordingly according to the change in the spacing between the sliding columns 11, thereby ensuring the synchronous movement between multiple sliding columns 11.

[0049] Multiple retractable barrier plates 127 are hingedly mounted at the lower hinge of the scissor-type linkage 126. These effectively block the spread of residual flames from other cables during flame retardancy testing, preventing them from continuing to burn the cable being tested and thus negatively impacting the accuracy of the test results. When the sliding posts 11 adjust their spacing, the scissor-type linkage 126 drives the retractable barrier plates 127 to extend and retract synchronously, ensuring they remain in the proper position to effectively block residual flames.

[0050] Specifically, when the test environment is adjusted to adapt to the cable specifications, the first motor 122 on the side wall of the fixed block 121 is started by the controller 3, and the first motor 122 drives the fixedly connected threaded rod 123 to rotate. According to the principle of threaded transmission, when the threaded rod 123 rotates, the connecting block 124 will make a linear motion along the thread direction on the threaded rod 123, thereby driving the sliding post 11 to slide on the test frame 9. During the sliding process of the sliding post 11, the sliding of the sliding post 11 will cause the relative position between the protruding rods 125 to change. When the sliding post 11 slides to both sides, the distance between the protruding rods 125 increases, and the scissor-type connecting rod 126 is pulled by the protruding rod 125 and gradually expands. When the sliding post 11 slides to the middle, the distance between the protruding rods 125 decreases, and the scissor-type connecting rod 126 will contract accordingly. Through this expansion and contraction change of the scissor-type connecting rod 126, it is ensured that the multiple sliding posts 11 can achieve synchronous movement, thereby achieving the purpose of adjusting the spacing between the multiple sliding posts 11.

[0051] During the flame retardant test of the flame retardant cable for coal mines, the sliding column 11 has been adjusted to the appropriate spacing. If there is a residual fire in other cables around it, the multiple telescopic baffles 127 installed at the hinge below the scissor-type connecting rod 126 will come into play. Since the scissor-type connecting rod 126 will drive the telescopic baffles 127 to retract synchronously when the sliding column 11 adjusts the spacing, the telescopic baffles 127 are in the appropriate position at this time. These telescopic baffles 127 can effectively block the spread of residual fire in other cables, preventing the residual fire from continuing to burn the cable being tested, thus avoiding the residual fire from causing additional combustion effects on the cable being tested, thereby ensuring the accuracy of the flame retardant test results, so that the test results can truly and accurately reflect the actual flame retardant performance of the flame retardant cable for coal mines.

[0052] In order to solve the technical problem that the test stand 9 will be deformed and skewed after long-term use, so that the infrared rangefinder 135 cannot accurately measure the carbonization height of the cable when the cable is subjected to the carbonization height test after flame retardancy, Figure 7 - Figure 8 As shown, the following preferred technical solutions are provided:

[0053] A flame retardant cable performance test system for coal mines includes a test component 13 and a correction component 136. The test component 13 is convenient for measuring the carbonization height of the cable body 7 after the flame retardant test. The correction component 136 is convenient for correcting the test frame 9 to ensure that the position of the test frame 9 is accurate, thereby ensuring the reliability of the test results. The test component 13 is provided with two groups. The test component 13 includes a fixed seat 131, the fixed seat 131 is fixed on the inner wall of the flame retardant test box 1, and a screw rod 132 is rotatably connected to the fixed seat 131. The side wall of the flame retardant test box 1 is fixedly connected to a second motor 133, and the output end of the second motor 133 is fixedly connected to the screw rod 132. Next, the screw rod 132 is threadedly connected to a slide 134, and an infrared rangefinder 135 is fixedly mounted on the surface of the slide 134. The model of the infrared rangefinder 135 is YHJ-200J, which is an instrument that uses infrared rays to measure distance. During the test, a beam of infrared light will be emitted from the infrared rangefinder 135. After the infrared light hits the cable body 7, it will be reflected. The reflected infrared light is focused onto the CMOS sensor through the lens. According to the imaging position of the light on the sensor and the geometric structure of the instrument, the distance from the target object to the rangefinder is calculated using the trigonometric function relationship, thereby achieving accurate carbonization height distance testing.

[0054] The correction assembly 136 includes a connecting frame 361, which is fixedly connected to the top surface of the fixing seat 131, and a receiving column 362 is fixedly connected to the end of the connecting frame 361. A cavity is opened in the receiving column 362, which provides space for the installation and movement of the spring 363 and the rubber resistance rod 364. The receiving column 362 is fixedly connected with a spring 363, which is elastic and can provide elastic force for the rubber resistance rod 364. The other end of the spring 363 is fixedly connected to the rubber resistance rod 364, and the side wall of the sliding column 11 is fixedly connected to the resistance block 365. The rubber resistance rod 364 is in contact with the resistance block 365. During the mobile test, the rubber resistance rod 364 will continue to move with the infrared rangefinder 135 to contact the test frame 9. When the test frame 9 is always in a vertical state, the rubber resistance rod 364 will not undergo compression changes. When it occurs, adjustments are made in time to avoid affecting the accuracy of the test results.

[0055] Specifically, during the flame-retardant test of coal mine flame-retardant cables, controller 3 issues commands to second motor 133, causing it to rotate screw 132. As screw 132 rotates, a slide 134 mounted on its exterior moves smoothly horizontally, and an infrared rangefinder 135 mounted on the surface of slide 134 also moves horizontally in sync. During this process, infrared rangefinder 135 accurately measures the height of the unburned cable body 7, as well as the vertical height between the cable body 7 and the bottom of the flame-retardant test chamber 1, and records these measurements in detail.

[0056] During the formal test, the burner 2 is started to burn the cable body 7. During the test, the driving machine 81 can drive the rotating rod 8 to rotate again as needed, so that the test frame 9 drives the cable body 7 to rotate, simulating the flame retardancy of the cable at different angles, and more comprehensively testing the flame retardancy of the cable. By manipulating the test frame 9 to rotate, the flame retardancy test conditions of the cable at different angles are simulated, thereby more comprehensively and truly reflecting the flame retardancy of the cable in actual use scenarios.

[0057] When the test is completed, the test frame 9 is not in the initial position, and the system enters the calibration phase. At this time, the rubber resistance rod 364 in the calibration assembly 136 extends outward under the natural action of the spring 363. In order to ensure the accuracy of subsequent tests, the test frame 9 needs to be calibrated. Then, the driving motor 81 is started to rotate the rotating rod 8, thereby causing the test frame 9 to rotate. When the resistance block 365 on the side wall of the test frame 9 and the rubber resistance rod 364 fit together, the resistance block 365 will exert an extruding force on the rubber resistance rod 364, causing the rubber resistance rod 364 to slide an appropriate distance into the interior of the receiving column 362, which can accurately form a strict 90-degree vertical state between the test frame 9 and the resistance block 365, thereby ensuring that the infrared rangefinder 135 and the test frame 9 are in an ideal state of absolute level.

[0058] After completing the calibration of the test stand 9, the controller 3 controls the second motor 133 again to drive the screw 132 to rotate. When the screw 132 rotates, the slide 134 and the infrared rangefinder 135 on its surface will move horizontally again. At this time, the infrared rangefinder 135 measures the carbonization height of the cable body 7 after the combustion is completed. The controller 3 will accurately calculate the initial recorded cable body 7 height data and the residual height data obtained by the current measurement, thereby obtaining the carbonization height of the cable body 7. Using this measurement method can effectively avoid the result deviation caused by the difficulty in measuring the burned and broken parts of the cable body 7 during the cable combustion process, greatly improving the accuracy and reliability of the test results. In this ideal horizontal state, the rangefinder can greatly improve the measurement accuracy during the subsequent horizontal movement process, effectively reducing the measurement error caused by angular deviation.

[0059] When the friction block 365 no longer contacts the rubber friction rod 364, or the rubber friction rod 364 is over-extruded and slides out of the normal range, this indicates that the test frame 9 has tilted. At this time, the rangefinder will quickly utilize its intelligent detection function, promptly converting the relevant data detected by the scan into an electrical signal and accurately transmitting it to the controller 3. Upon receiving this signal, the controller 3 will immediately activate the driver 81, which will drive the rotating rod 8 to rotate, thereby achieving fine-tuning of the test frame 9. Through this automatic detection and fine-tuning mechanism, the tilt of the test frame 9 can be quickly and effectively corrected, ensuring that it is always in the correct position, providing a reliable foundation for subsequent accurate measurements.

[0060] In order to better explain the above embodiment, the present invention proposes another embodiment, a test method of a flame retardant cable performance test system for coal mines, comprising the following steps:

[0061] Step 1: Adjust the cable spacing. The adjustment assembly 12 controls the multiple sliding posts 11 to drive the clamping base 14 to move horizontally in synchronization, thereby adjusting the spacing between them to suit the cable specifications. At the same time, the multiple telescopic blocking plates 127 are synchronously extended and retracted as the sliding posts 11 adjust the spacing to maintain the appropriate position.

[0062] Step 2: Cable loading: After the staff arranges the cable body 7 adaptively, they move it to the designated position through the loading assembly. The cable body 7 is fed into the clamping seat 14 to achieve rapid loading of the cable body 7.

[0063] Step 3: Cable fixation: When the cable body 7 enters the clamping seat 14, the third motor 152 is started to drive the rotating rod 153 to rotate the multiple double-headed screws 154, so that the two sliding blocks 155, the L-shaped frame 156 and the clamping plate 157 on the double-headed screw 154 move symmetrically toward each other, thereby clamping the cable body 7, thereby achieving synchronous clamping and fixing of multiple groups of cable bodies 7;

[0064] Step 4: Cable flame retardancy test: Start the burner 2, which generates a stable flame and performs a combustion test on the cable body 7. During the test, the driving motor 81 is started to rotate the rotating rod 8, causing the test frame 9 on the rotating rod 8 to rotate, so as to simulate the flame retardancy of the cable at different angles and more comprehensively test the flame retardancy of the cable.

[0065] Step 5: Measuring the carbonization height of the cable. The second motor 133 drives the screw rod 132 to rotate, driving the external slide 134 to move horizontally. The infrared rangefinder 135 moves horizontally synchronously to accurately measure the height of the unburned cable body 7 itself, as well as the vertical height between the cable body 7 and the bottom surface of the flame retardant test box 1.

[0066] Step 6: Measurement and calibration: Start the driving motor 81 to rotate the rotating rod 8 and the test frame 9. The squeezing distance between the friction block 365 and the rubber friction rod 364 is used to determine whether the test frame 9 and the friction block 365 are in a vertical state. Ensure that the infrared rangefinder 135 and the test frame 9 are in an ideal state of absolute horizontality to avoid angular differences affecting the measurement accuracy.

[0067] Step 7: Calculate and measure the carbonization height of the cable. The slide 134 and the infrared rangefinder 135 on its surface are driven to move horizontally again. The infrared rangefinder 135 measures the carbonization height of the cable body 7 after combustion. The controller 3 accurately calculates the initial recorded height data of the cable body 7 and the residual height data obtained by the current measurement to obtain the carbonization height of the cable body 7.

[0068] Step 8: Measurement data generation: various data during the test process, such as temperature, time, and cable combustion conditions, are collected in real time through the controller 3, and analyzed and processed, and finally a test report is generated to facilitate staff to view the flame retardant test data and evaluate the performance of flame retardant cables for coal mines.

[0069] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0070] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A flame retardant cable performance testing system for coal mines, comprising a flame retardant test box (1), characterized in that: A burner (2) is installed in the flame retardant test box (1), a controller (3) is fixed to the side wall of the flame retardant test box (1), a lifting frame (5) is provided in the flame retardant test box (1) for lifting and sliding, an auxiliary plate (6) is clamped and installed on the lifting frame (5), a cable body (7) is clamped in the auxiliary plate (6), a rotating rod (8) is rotatably connected in the flame retardant test box (1), a driving machine (81) is fixedly connected to the side wall of the flame retardant test box (1), an output end of the driving machine (81) is fixedly connected to the rotating rod (8), a test frame (9) is fixedly sleeved on the rotating rod (8), a fixed column (10) is fixed on the test frame (9), a plurality of sliding columns (11) are slidably connected to the test frame (9), and the bottom surfaces of the plurality of sliding columns (11) are fixedly connected to a clamping seat (14); Also includes: A loading assembly, the loading assembly facilitates loading the cable body (7); An adjusting component (12), wherein the adjusting component (12) is convenient for driving a plurality of the sliding columns (11) to slide synchronously to adjust the spacing, and the adjusting component (12) includes a fixed block (121), wherein the fixed block (121) is fixedly connected to the side wall of the fixed column (10), and the side wall of the fixed block (121) is fixedly connected to a first motor (122), and the output end of the first motor (122) is fixedly connected to a threaded rod (123), and a connecting block (124) is threadedly sleeved on the threaded rod (123), and the connecting block (124) is fixedly connected to the sliding column (11) near the side wall of the flame retardant test box (1), and the sliding column (11) and the side wall of the fixed column (10) are fixedly connected to a convex rod (125), and a plurality of the convex rods (125) are hingedly connected to a scissor-type connecting rod (126), and a plurality of telescopic blocking plates (127) are hingedly installed at the hinge below the scissor-type connecting rod (126); A test assembly (13), the test assembly (13) is convenient for measuring the carbonization height of the cable body (7) after the flame retardant test, the test assembly (13) includes a fixed seat (131), the fixed seat (131) is fixed on the inner wall of the flame retardant test box (1), a screw rod (132) is rotatably connected in the fixed seat (131), a second motor (133) is fixedly connected to the side wall of the flame retardant test box (1), an output end of the second motor (133) is fixedly connected to the screw rod (132), a slide seat (134) is threadedly connected to the screw rod (132), and an infrared rangefinder (135) is fixedly installed on the surface of the slide seat (134); A correction component (136), the correction component (136) is convenient for correcting the test frame (9), the correction component (136) includes a connecting frame (361), the connecting frame (361) is fixedly connected to the top surface of the fixing seat (131), the end of the connecting frame (361) is fixedly connected to a receiving column (362), a cavity is provided in the receiving column (362), a spring (363) is fixedly connected in the receiving column (362), the other end of the spring (363) is fixedly connected to a rubber resistance rod (364), the side wall of the sliding column (11) is fixedly connected to a resistance block (365), and the rubber resistance rod (364) is in contact with the resistance block (365); A clamping assembly (15) is provided, wherein the clamping assembly (15) is convenient for clamping and fixing the cable body (7). The clamping assembly (15) includes a special-shaped frame (151), wherein the special-shaped frame (151) is fixed to the side walls of two slide columns (11) on opposite sides, wherein one end of the side wall of the special-shaped frame (151) is fixedly connected to a third motor (152), wherein the output end of the third motor (152) is fixedly connected to a rotating rod (153), wherein a double-headed screw (154) is clamped on the rotating rod (153), wherein a sliding block (155) is symmetrically threadedly mounted on the double-headed screw (154), wherein the sliding block (155) is fixedly connected to an L-shaped frame (156), wherein a clamping plate (157) is fixedly connected to the end of the L-shaped frame (156), and a sheet sensor (158) is fixedly mounted on the inner wall of the clamping seat (14).

2. A flame-retardant cable performance testing system for coal mines according to claim 1, characterized in that: The feeding assembly comprises: A notch (4) is provided on two opposite side walls of the flame retardant test box (1); the side walls of the flame retardant test box (1) are fixedly connected to an electric telescopic column (51); an output end of the electric telescopic column (51) is fixedly connected to a slider (52); and the slider (52) is slidably connected to the notch (4).

3. A flame-retardant cable performance testing system for coal mines according to claim 2, characterized in that: The test components (13) are provided in two groups.

4. A flame-retardant cable performance testing system for coal mines according to claim 3, characterized in that: The sliding block (155), the L-shaped frame (156) and the clamping plate (157) are symmetrically arranged with respect to the axis of the clamping seat (14), and the inner walls of the two clamping plates (157) are clamped and fitted with the outer wall of the cable body (7).

5. A flame-retardant cable performance testing system for coal mines according to claim 4, characterized in that: The double-headed screws (154) are arranged in a number corresponding to the clamping seats (14).

6. A flame-retardant cable performance testing system for coal mines according to claim 5, characterized in that: The controller (3) is electrically connected to the burner (2), the driving machine (81), the first motor (122), the second motor (133), the third motor (152), the infrared rangefinder (135), and the chip sensor (158).

7. A test method for a flame-retardant cable performance test system for coal mines according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Cable spacing adjustment, by controlling the plurality of slide posts (11) through the adjustment component (12) to drive the clamping seat (14) to move horizontally synchronously, thereby adjusting the spacing between them to adapt to the cable specifications, and at the same time, the plurality of telescopic baffles (127) are synchronously extended and retracted as the slide posts (11) adjust the spacing and are in the appropriate position; S2: Cable loading, after the staff arranges the cable body (7) adaptively and preliminarily, they move it to the designated position through the loading assembly, and the cable body (7) is sent into the clamping seat (14), realizing the rapid loading of the cable body (7); S3: When the cable is fixed and the cable body (7) enters the clamping seat (14), the third motor (152) is started to drive the rotating rod (153) to drive the multiple double-headed screws (154) to rotate, so that the two sliding blocks (155), the L-shaped frame (156) and the clamping plate (157) on the double-headed screw (154) move symmetrically toward each other, thereby clamping the cable body (7) to achieve synchronous clamping and fixing of multiple groups of cable bodies (7); S4: Cable flame retardancy test, start the burner (2), the burner (2) generates a stable flame, and performs a combustion test on the cable body (7). During the test, the driving machine (81) is started to drive the rotating rod (8) to rotate, so that the test frame (9) on the rotating rod (8) rotates, so as to simulate the flame retardancy of the cable at different angles and test the flame retardancy of the cable more comprehensively; S5: Cable carbonization height measurement, the second motor (133) drives the screw rod (132) to rotate and drives the external slide (134) to move in the horizontal direction, and the infrared rangefinder (135) moves horizontally synchronously to accurately measure the height of the unburned cable body (7) itself and the vertical height between the cable body (7) and the bottom surface of the flame retardant test box (1); S6: measurement and calibration, starting the driving machine (81) to drive the rotating rod (8) and the test frame (9) to rotate, judging whether the test frame (9) and the contact block (365) are in a vertical state by the extrusion distance between the contact block (365) and the rubber contact rod (364), ensuring that the infrared rangefinder (135) and the test frame (9) are in an ideal state of absolute horizontality, avoiding the angle difference from affecting the accuracy of the measurement; S7: Calculate and measure the carbonization height of the cable. Drive the slide (134) and the infrared rangefinder (135) on its surface to move horizontally again. The infrared rangefinder (135) measures the carbonization height of the cable body (7) after the combustion is completed. The controller (3) accurately calculates the initial recorded height data of the cable body (7) and the residual height data obtained by the current measurement to obtain the carbonization height of the cable body (7). S8: Measurement data generation: Various data during the test process, such as temperature, time, and cable combustion conditions, are collected in real time through the controller (3), and analyzed and processed. Finally, a test report is generated to facilitate staff to view the flame retardant test data and evaluate the performance of flame retardant cables for coal mines.

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