A cable flame retardant and fire resistance performance testing apparatus and method

Abstract

This invention relates to the field of cable fire resistance performance testing technology, specifically to a cable flame retardant and fire resistance performance testing equipment and method, including a top plate, a lifting mechanism, a worktable, a guiding mechanism, two vertical plates, a rotating rod, a first motor, and a flame spray pipe. A linkage mechanism is provided on the inner side of the vertical plates, and a clamp is rotatably mounted below the vertical plates. The guiding mechanism includes an L-shaped plate, two mounting boxes, two support blocks, a rotating rod, an arc-shaped guide plate, and a second motor. Worm gears are provided at both ends of the rotating rod, and a worm is rotatably mounted inside the mounting boxes. By rotating the L-shaped plate around the rotating rod, the position of the arc-shaped guide plate is adjusted to a suitable angle, so that the arc-shaped guide plate and the two conical guide plates form a complete guiding channel. The cable enters the clamp along the guiding channel. Simultaneously, the first motor drives the rotating rod to rotate, thereby causing the two linkage mechanisms to operate synchronously, driving the clamp to rotate, and cooperating with the flame spray pipe on the worktable to perform fire resistance performance testing on the cable.

Description

Technical Field

[0001] This invention relates to the field of cable fire resistance performance testing technology, and in particular to a test device and method for cable flame retardancy and fire resistance performance. Background Technology

[0002] Cable fire resistance testing is a process of evaluating the safety performance of cables under extreme conditions such as high temperature and open flame, by simulating a fire environment. This test mainly examines key indicators such as the cable's flame retardancy, fire resistance, smoke emission, and toxic gas generation. Testing methods typically follow international or industry standards, using techniques such as flame jetting, high-temperature furnace combustion, and smoke density measurement to verify whether the cable can slow the spread of fire, reduce the release of toxic fumes, and ensure short-term maintenance of power transmission functions, thereby reducing the risk of personal injury and property damage in a fire.

[0003] Existing patent CN211697586U discloses a fire-resistant cable testing platform, including a control console. A protective cover is fixedly connected to the control console, and a heat insulation box is fixedly connected to the inner wall of the protective cover. A dual-axis motor is fixedly installed inside the heat insulation box, and a rotating shaft is fixedly connected to the output end of the dual-axis motor. Bearing seats are symmetrically fixedly connected to the inner wall of the protective cover, and the end of the rotating shaft away from the dual-axis motor is rotatably connected to the bearing seats. A clamp is also symmetrically rotatably connected to the inner wall of the protective cover. A transmission mechanism is provided between the clamp and the rotating shaft. This prior art uses the dual-axis motor to drive the rotating shaft to rotate, thereby causing the drive sprocket to rotate. Under the meshing action of the transmission chain, the driven sprocket rotates, and then the clamp follows the rotation, further driving the cable to be tested held by the clamp to rotate. This allows the flame-spraying tube to perform a more comprehensive fire resistance test on the cable to be tested during flame-spraying operation, resulting in higher testing efficiency.

[0004] However, in the aforementioned prior art, because the distance between the two sleeves is relatively large and there is no structure to guide the cable, two people are required to work together to fix the cable when placing it between the two sleeves. Summary of the Invention

[0005] The purpose of this invention is to provide a test device and method for the flame retardant and fire resistance performance of cables, which solves the technical problem in the prior art that, due to the large distance between the two jackets and the lack of a structure to guide the cable, two people are required to cooperate to fix the cable when placing it between the two jackets.

[0006] To achieve the above objectives, the present invention provides a cable flame retardant and fire resistance performance testing device, including a top plate, a lifting mechanism, a worktable, and a guiding mechanism. Two vertical plates are symmetrically arranged below the top plate. A linkage mechanism is provided on the inner side of each vertical plate, and the two linkage mechanisms between the two vertical plates are driven by a rotating rod and a first motor. A clamp is rotatably arranged below each vertical plate, and the clamp is driven by a corresponding linkage mechanism. A flame-spraying pipe is provided on the upper surface of the worktable. The top plate is positioned above the worktable via the lifting mechanism. The guiding mechanism includes an L-shaped plate, two mounting boxes, and two support blocks. One end of the L-shaped plate... A rotating rod is provided, with worm gears at both ends. An arc-shaped guide plate is provided at the other end of the L-shaped plate. A worm gear is rotatably installed inside the mounting box and is driven by a second motor. The L-shaped plate is rotatably connected to the corresponding support block via the rotating rod and is located between the two support blocks. The arc-shaped guide plate is located between the two clamps. The two mounting boxes are respectively fixedly connected to the corresponding support blocks and are located on one side of the support blocks. The worm gear meshes with the worm gear. The two support blocks are respectively fixedly connected to the top plate and are located above the top plate. The L-shaped plate is located on the front end face of the top plate.

[0007] The guiding mechanism further includes two conical guide plates, which are fixedly connected to the corresponding sleeves and located inside the sleeves. The inner surface of the arc-shaped guide plate is at the same horizontal line as one end of the two conical guide plates.

[0008] One end of the jacket is provided with an arc-shaped limiting plate, which also abuts against the arc-shaped guide plate and is located above the arc-shaped guide plate.

[0009] The cable flame retardant and fire resistance performance testing equipment further includes two clamping mechanisms. Each clamping mechanism includes multiple clamping components, each clamping component including a clamping block, a sliding rod, and a spring. One end of the sliding rod is provided with a base plate. The clamping block is fixedly connected to the sliding rod and located at the other end of the sliding rod. The sliding rod is slidably connected to the corresponding clamp and located at the other end of the clamp. The spring is sleeved on the sliding rod and abuts against the base plate and the corresponding clamp.

[0010] The linkage mechanism includes a driving gear, a linkage gear, a driven gear, and a fixed box. The driving gear, the linkage gear, and the driven gear are all rotatably disposed within the fixed box. The two driving gears between the two linkage mechanisms are driven by a rotating rod and the first motor. The driving gear meshes with the linkage gear, and the linkage gear meshes with the driven gear. The driven gear is fixedly connected to the corresponding clamp and is sleeved on the outside of the clamp. The fixed box is fixedly connected to the corresponding vertical plate and is located on the inside of the vertical plate, and is also sleeved on the clamp.

[0011] The driving gear is located above the linkage gear, and the linkage gear is located above the driven gear.

[0012] This invention also provides a method for testing the flame retardancy and fire resistance performance of cables, applied to the aforementioned cable flame retardancy and fire resistance testing equipment, comprising the following steps:

[0013] Based on the second motor driving the worm gear to drive the worm wheel, the L-shaped plate rotates around the rotating rod, and the arc-shaped guide plate is adjusted to be positioned between the two sleeves;

[0014] The cable to be tested is passed through any one of the clamps and enters the inner wall of the arc-shaped guide plate, then along its inner wall into the conical guide plate of another clamp, and then exits from the other clamp. The clamping member clamps the cable, and the top plate is lowered to a designated position based on the lifting mechanism.

[0015] Based on the first motor driving the rotating rod to drive the two driving gears to rotate and mesh with the linkage gear, the linkage gear meshes with the driven gear to drive the two clamps to rotate synchronously, and the cable between the two clamps rotates accordingly;

[0016] The flame is sprayed onto the cable through the flame jet tube to simulate a fire scenario encountered by the cable in actual use. During the cable combustion process, the burning situation of the cable is observed and relevant data is recorded.

[0017] This invention discloses a cable flame retardant and fire resistance performance testing device and method, comprising a top plate, a lifting mechanism, a worktable, and a guiding mechanism. Two vertical plates are symmetrically arranged below the top plate. A linkage mechanism is provided on the inner side of each vertical plate, and the two linkage mechanisms between the two vertical plates are driven by a rotating rod and a first motor. A clamp is rotatably arranged below each vertical plate. A flame-spraying pipe is provided on the upper surface of the worktable. The guiding mechanism includes an L-shaped plate, two mounting boxes, and two support blocks. A rotating rod is provided at one end of the L-shaped plate, and worm gears are provided at both ends of the rotating rod. An arc-shaped guide plate is provided at the other end of the L-shaped plate. A worm gear is rotatably arranged inside each mounting box, and the worm gear is driven by a second motor. The second motor drives the worm gear to rotate. The worm gear and the worm gear... The L-shaped plate is engaged, causing it to rotate around the rotating rod, thereby adjusting the position of the arc-shaped guide plate to a suitable angle. The inner surface of the arc-shaped guide plate is kept at the same horizontal line as one end of the two conical guide plates, forming a complete guide channel. The cable enters the clamp along the arc-shaped guide plate and the conical guide plate. At the same time, the first motor drives the rotating rod to rotate, thereby causing the two linkage mechanisms to operate synchronously, driving the clamp to rotate. In conjunction with the flame spray tube on the workbench, the fire resistance performance of the cable is tested. This method effectively solves the technical problem that, due to the large distance between the two clamps and the lack of a structure to guide the cable, two people are needed to cooperate to fix the cable when placing it between the two clamps. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0019] Figure 1 This is a side view of the first embodiment of the present invention.

[0020] Figure 2 This is the invention Figure 1 A cross-sectional view along line AA in the middle.

[0021] Figure 3 This is the invention Figure 2 A cross-sectional view along the BB line.

[0022] Figure 4 This is the invention Figure 3 A magnified view of a section at point C.

[0023] Figure 5 This is the invention Figure 3 A cross-sectional view of the DD line.

[0024] Figure 6 This is a side view of the second embodiment of the present invention.

[0025] Figure 7 This is the invention Figure 6 A cross-sectional view of the EE line.

[0026] Figure 8 This is the invention Figure 7 A magnified view of a section at point F.

[0027] Figure 9 This is the invention Figure 6 A cross-sectional view of the GG line.

[0028] Figure 10 This is a three-dimensional perspective view of the third embodiment of the present invention.

[0029] Figure 11 This is a side view of the third embodiment of the present invention.

[0030] Figure 12 This is the invention Figure 11 A cross-sectional view of the middle HH line.

[0031] Figure 13 This is a flowchart of the steps of a method for testing the flame retardant and fire-resistant properties of cables according to the present invention.

[0032] 101-Top plate, 102-Workbench, 103-Vertical plate, 104-Lifting mechanism, 105-Rotating rod, 106-First motor, 107-Jacket, 108-Flame pipe, 109-L-shaped plate, 110-Mounting box, 111-Support block, 112-Rotating rod, 113-Worm gear, 114-Arc-shaped guide plate, 115-Worm, 116-Second motor, 117-Conical guide plate, 118 - Arc-shaped limiting plate, 201- clamping block, 202- sliding rod, 203- spring, 204- base plate, 205- driving gear, 206- linkage gear, 207- driven gear, 208- fixing box, 301- lifting column, 302- lifting cylinder, 303- threaded groove, 304- third motor, 305- lifting screw, 306- positioning rod, 307- first reinforcing rod, 308- second reinforcing rod. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0034] First embodiment:

[0035] Please see Figures 1-5 ,in Figure 1 This is a side view of the first embodiment of the present invention. Figure 2 This is the invention Figure 1 Sectional view of line AA in the middle. Figure 3 This is the invention Figure 2 Sectional view of the middle BB line. Figure 4 This is the invention Figure 3 A magnified view of a section at point C. Figure 5 This is the invention Figure 3 A cross-sectional view of the DD line.

[0036] This invention provides a cable flame retardant and fire resistance performance testing device, including a top plate 101, a lifting mechanism 104, a worktable 102, and a guiding mechanism. Two vertical plates 103 are symmetrically arranged below the top plate 101. A linkage mechanism is provided on the inner side of each vertical plate 103, and the two linkage mechanisms between the two vertical plates 103 are driven by a rotating rod 105 and a first motor 106. A clamp 107 is rotatably arranged below each vertical plate 103, and the clamp 107 is driven by a corresponding linkage mechanism. A flame-spraying pipe 108 is provided on the upper surface of the worktable 102. 101 is positioned above the workbench 102 via the lifting mechanism 104. The guiding mechanism includes an L-shaped plate 109, two mounting boxes 110, and two support blocks 111. One end of the L-shaped plate 109 is provided with a rotating rod 112, and both ends of the rotating rod 112 are provided with worm gears 113. The other end of the L-shaped plate 109 is provided with an arc-shaped guide plate 114. A worm gear 115 is rotatably mounted inside the mounting box 110, and the worm gear 115 is driven by a second motor 116. The L-shaped plate 109 is rotatably connected to the corresponding support block 111 via the rotating rod 112. The two mounting boxes 110 are fixedly connected to the corresponding support blocks 111 and located on one side of the support blocks 111. The worm gear 115 meshes with the worm wheel 113. The two support blocks 111 are fixedly connected to the top plate 101 and located above the top plate 101. The L-shaped plate 109 is located on the front end face of the top plate 101. The second motor 116 drives the worm gear 115 inside the mounting box 110 to rotate. The worm gear 115 engages with the worm wheels 113 at both ends of the rotating rod 112, thereby driving the L-shaped plate 109 to rotate around the rotating rod 112, and thus adjusting the position of the arc-shaped guide plate 114. When placing the cable, the operator can use the arc-shaped guide plate 114 to guide the cable between the two clamps 107, which solves the problem that it is difficult for a single person to accurately place the cable into the clamps 107 due to the large distance between the two clamps 107 and the lack of a guiding structure. This improves the convenience and accuracy of cable placement, reduces the difficulty of operation, and improves the efficiency of test preparation.

[0037] The guiding mechanism further includes two conical guide plates 117, which are fixedly connected to the corresponding clamps 107 and located inside the clamps 107. The inner wall of the arc-shaped guide plate 114 is at the same horizontal line as one end of the two conical guide plates 117. The conical guide plates 117 can provide more precise guidance for the cable to enter the clamps 107. Together with the arc-shaped guide plates 114, they form a more complete and smoother guiding channel, allowing the cable to be guided more smoothly and accurately into the clamps 107. This further improves the accuracy and efficiency of cable placement, reduces problems such as bending and offset that may occur during cable placement, and helps ensure the accuracy and stability of subsequent tests.

[0038] Secondly, an arc-shaped limiting plate 118 is provided at one end of the clamp 107, and the arc-shaped limiting plate 118 also abuts against the arc-shaped guide plate 114 and is located above the arc-shaped guide plate 114. The arc-shaped limiting plate 118 can limit the cable and prevent the cable from slipping out of the clamp 107 during placement or testing, ensuring that the cable is always within the effective clamping range of the clamp 107. At the same time, it cooperates with the arc-shaped guide plate 114 to further improve the cable guiding and positioning structure, so that the cable maintains a stable position during testing, improves the safety and reliability of testing, and avoids the test results being affected by changes in the cable position.

[0039] When using the cable flame retardancy and fire resistance testing equipment of this embodiment, the second motor 116 drives the worm gear 115 to rotate. The worm gear 115 meshes with the worm wheel 113, causing the L-shaped plate 109 to rotate around the rotating rod 112, thereby adjusting the position of the arc-shaped guide plate 114 to a suitable angle. The inner surface of the arc-shaped guide plate 114 and one end of the two conical guide plates 117 are kept at the same horizontal line, forming a complete guide channel. The cable enters the jacket 107 along the arc-shaped guide plate 114 and the conical guide plates 117. When the first motor 106 operates, it drives the rotating rod 105 to rotate, thereby causing the two linkage mechanisms to operate synchronously, driving the clamp 107 to rotate. In conjunction with the flame-spraying pipe 108 on the workbench 102, the fire resistance performance of the cable is tested. The above test can effectively test the flame retardancy and fire resistance of the cable. In this way, the technical problem of needing two people to cooperate to fix the cable when it is placed between the two clamps 107 is effectively solved because the distance between the two clamps 107 is far and there is no structure to guide the cable.

[0040] Second embodiment:

[0041] Based on the first embodiment, please refer to Figures 6-9 ,in Figure 6 This is a side view of the second embodiment of the present invention. Figure 7 This is the invention Figure 6 Sectional view of the EE line. Figure 8 This is the invention Figure 7 A magnified view of a section at point F. Figure 9 This is the invention Figure 6 A cross-sectional view of the GG line.

[0042] This invention provides a cable flame retardant and fire resistance performance testing device, which further includes two clamping mechanisms. Each clamping mechanism includes multiple clamping components, each including a clamping block 201, a sliding rod 202, and a spring 203. One end of the sliding rod 202 is provided with a base plate 204. The clamping block 201 is fixedly connected to the sliding rod 202 and located at the other end of the sliding rod 202. The sliding rod 202 is slidably connected to a corresponding clamping sleeve 107 and located at the other end of the clamping sleeve 107. The spring 203 is sleeved on the sliding rod 202 and abuts against the base plate 204. Between the plate 204 and the corresponding clamp 107, the elastic force of the spring 203 can cause the clamping block 201 to apply a certain clamping force to the cable when the cable is placed, firmly clamping the cable in the clamp 107, ensuring that the cable will not loosen or fall off due to external force during the test. Moreover, the sliding connection design between the sliding rod 202 and the clamp 107 allows the clamping mechanism to be adaptively adjusted to a certain extent according to the thickness of the cable, improving the versatility and applicability of the clamping mechanism and better meeting the testing needs of cables of different specifications.

[0043] The linkage mechanism includes a driving gear 205, a linkage gear 206, a driven gear 207, and a fixed box 208. The driving gear 205, linkage gear 206, and driven gear 207 are all rotatably mounted within the fixed box 208. The two driving gears 205 between the two linkage mechanisms are driven by a rotating rod 105 and the first motor 106. The driving gear 205 meshes with the linkage gear 206, and the linkage gear 206 meshes with the driven gear 207. The driven gear 207 is fixedly connected to the corresponding clamp 107 and is sleeved on the outside of the clamp 107. The fixed box 208... The first motor 106 is fixedly connected to the corresponding vertical plate 103 and located inside the vertical plate 103. It is also sleeved on the clamp 107. Through this multi-stage gear transmission design, the first motor 106 can drive the two linkage mechanisms to work synchronously through the rotating rod 105, thereby driving the two clamps 107 to rotate synchronously. During the test, the synchronous rotation of the clamps 107 can make the cable be subjected to uniform force and environmental action during the burning process, ensuring the consistency of test conditions and improving the accuracy and reliability of test results. At the same time, the setting of the fixing box 208 can protect the gear transmission components and extend the service life of the equipment.

[0044] Secondly, the driving gear 205 is located above the linkage gear 206, and the linkage gear 206 is located above the driven gear 207.

[0045] Third embodiment:

[0046] Based on the second embodiment, please refer to Figures 10-12 ,in Figure 10 This is a three-dimensional perspective view of the third embodiment of the present invention. Figure 11 This is a side view of the third embodiment of the present invention. Figure 12 This is the invention Figure 11 A cross-sectional view of the middle HH line.

[0047] This invention provides a testing device for the flame retardant and fire-resistant properties of cables. The lifting mechanism 104 includes a lifting column 301 and a lifting cylinder 302. The upper column has a threaded groove 303. A third motor 304 is arranged below the lifting cylinder 302. A lifting screw 305 is provided at the output end of the third motor 304. The lifting column 301 is fixedly connected to the top plate 101 and located at the rear end face of the top plate 101. The lifting column 301 is also slidably connected to the lifting cylinder 302 and located inside the lifting cylinder 302. The lifting screw 305 is threadedly connected to the lifting column 301 and located in the threaded groove 303. Inside the 03, the lifting cylinder 302 is fixedly connected to the workbench 102 and located at the rear end face of the workbench 102. The lifting screw 305 is driven to rotate by the third motor 304. Under the action of the threaded groove 303, the lifting column 301 can slide up and down inside the lifting cylinder 302, thereby realizing the lifting function of the top plate 101 relative to the workbench 102. During the cable fire resistance performance test, the height of the top plate 101 can be adjusted as needed to facilitate the placement of cables, adjustment of test positions, and other operations, thereby improving the flexibility and applicability of the equipment and meeting the needs of different test scenarios.

[0048] Secondly, the lifting mechanism 104 also includes two positioning rods 306. The two positioning rods 306 are fixedly connected to the lifting cylinder 302 and located at the inner bottom of the lifting cylinder 302. The two positioning rods 306 are also slidably connected to the lifting column 301 and located inside the lifting column 301. The positioning rods 306 can position and guide the lifting movement of the lifting column 301, ensuring that the lifting column 301 maintains a stable movement trajectory during the lifting process, preventing the lifting column 301 from shaking or deviating, and improving the stability and reliability of the lifting mechanism 104.

[0049] The cable flame retardant and fire resistance performance testing equipment also includes two first reinforcing rods 307 and two second reinforcing rods 308. The two first reinforcing rods 307 are fixedly connected to the top plate 101 and symmetrically arranged on the rear end face of the top plate 101. The two first reinforcing rods 307 are fixedly connected to the lifting column 301 and located on the outside of the lifting column 301. The two second reinforcing rods 308 are fixedly connected to the workbench 102 and located on the rear end face of the workbench 102. The two second reinforcing rods are fixedly connected to the lifting cylinder 302 and located on the outside of the lifting cylinder 302. The first reinforcing rods 307 and the second reinforcing rods 308 facilitate the stability between the top plate 101, the lifting mechanism 104 and the workbench 102.

[0050] Based on the third embodiment, please refer to Figure 13 ,in Figure 13 This is a flowchart of the steps of a method for testing the flame retardant and fire-resistant properties of cables according to the present invention.

[0051] This invention also provides a method for testing the flame retardancy and fire resistance performance of cables, applied to the aforementioned cable flame retardancy and fire resistance testing equipment, comprising the following steps:

[0052] Based on the second motor 116 driving the worm 115 to transmit the worm wheel 113, the L-shaped plate 109 rotates around the rotating rod 112, and the arc-shaped guide plate 114 is adjusted to be positioned between the two sleeves 107;

[0053] The cable to be tested is passed through any one of the clamps 107 and enters the inner wall of the arc-shaped guide plate 114, then along its inner wall into the conical guide plate 117 of another clamp 107, and then exits from the other clamp 107. The clamping member clamps the cable, and the top plate 101 is lowered to the designated position based on the lifting mechanism.

[0054] Based on the first motor 106 driving the rotating rod 105 to drive the two driving gears 205 to rotate and mesh with the linkage gear 2062, the linkage gear 206 meshes with the driven gear 207 to drive the two clamps 107 to rotate synchronously, and the cable between the two clamps 107 rotates accordingly.

[0055] The flame is sprayed onto the cable through the flame tube 108 to simulate a fire scenario encountered by the cable in actual use. During the cable burning process, the burning situation of the cable is observed and relevant data is recorded.

[0056] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A cable flame retardant and fire resistance performance testing device, comprising a top plate, a lifting mechanism, and a worktable, wherein two vertical plates are symmetrically arranged below the top plate, a linkage mechanism is provided on the inner side of each vertical plate, and the two linkage mechanisms between the two vertical plates are driven by a rotating rod and a first motor; a clamp is rotatably arranged below each vertical plate, and the clamp is driven by a corresponding linkage mechanism; a flame-spraying pipe is provided on the upper surface of the worktable; and the top plate is positioned above the worktable via the lifting mechanism, characterized in that... It also includes guiding institutions; The guiding mechanism includes an L-shaped plate, two mounting boxes, and two support blocks. A rotating rod is provided at one end of the L-shaped plate, and worm gears are provided at both ends of the rotating rod. An arc-shaped guide plate is provided at the other end of the L-shaped plate. A worm gear is rotatably mounted inside each mounting box and is driven by a second motor. The L-shaped plate is rotatably connected to the corresponding support block via the rotating rod and is located between the two support blocks. The arc-shaped guide plate is located between the two clamps. The two mounting boxes are respectively fixedly connected to the corresponding support blocks and are located on one side of the support blocks. The worm gear meshes with the worm gears. The two support blocks are respectively fixedly connected to the top plate and are located above the top plate. The L-shaped plate is located on the front end face of the top plate.

2. The cable flame retardant and fire resistance testing equipment as described in claim 1, characterized in that, The guiding mechanism further includes two conical guide plates, which are fixedly connected to the corresponding sleeves and located inside the sleeves. The inner surface of the arc-shaped guide plate is at the same horizontal line as one end of the two conical guide plates.

3. The cable flame retardant and fire resistance testing equipment as described in claim 2, characterized in that, One end of the jacket is provided with an arc-shaped limiting plate, and the arc-shaped limiting plate also abuts against the arc-shaped guide plate and is located above the arc-shaped guide plate.

4. The cable flame retardant and fire resistance testing equipment as described in claim 3, characterized in that, The cable flame retardant and fire resistance performance testing equipment also includes two clamping mechanisms. Each clamping mechanism includes multiple clamping components, each clamping component including a clamping block, a sliding rod, and a spring. One end of the sliding rod is provided with a base plate. The clamping block is fixedly connected to the sliding rod and located at the other end of the sliding rod. The sliding rod is slidably connected to the corresponding clamp and located at the other end of the clamp. The spring is sleeved on the sliding rod and abuts against the base plate and the corresponding clamp.

5. The cable flame retardant and fire resistance testing equipment as described in claim 4, characterized in that, The linkage mechanism includes a driving gear, a linkage gear, a driven gear, and a fixed box. The driving gear, the linkage gear, and the driven gear are all rotatably disposed within the fixed box. The two driving gears between the two linkage mechanisms are driven by a rotating rod and the first motor. The driving gear meshes with the linkage gear, and the linkage gear meshes with the driven gear. The driven gear is fixedly connected to the corresponding clamp and is sleeved on the outside of the clamp. The fixed box is fixedly connected to the corresponding vertical plate and is located on the inside of the vertical plate, and is also sleeved on the clamp.

6. The cable flame retardant and fire resistance testing equipment as described in claim 5, characterized in that, The driving gear is located above the linkage gear, and the linkage gear is located above the driven gear.

7. A method for testing the flame retardancy and fire resistance performance of cables, applied to the cable flame retardancy and fire resistance testing equipment as described in claim 6, characterized in that, Includes the following steps: Based on the second motor driving the worm gear to drive the worm wheel, the L-shaped plate rotates around the rotating rod, and the arc-shaped guide plate is adjusted to be positioned between the two sleeves; The cable to be tested is passed through any one of the clamps and enters the inner wall of the arc-shaped guide plate, then along its inner wall into the conical guide plate of another clamp, and then exits from the other clamp. The clamping member clamps the cable, and the top plate is lowered to a designated position based on the lifting mechanism. Based on the first motor driving the rotating rod to drive the two driving gears to rotate and mesh with the linkage gear, the linkage gear meshes with the driven gear to drive the two clamps to rotate synchronously, and the cable between the two clamps rotates accordingly; The flame is sprayed onto the cable through the flame jet tube to simulate a fire scenario encountered by the cable in actual use. During the cable combustion process, the burning situation of the cable is observed and relevant data is recorded.

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