A device for detecting fire resistance of an aqueous paint layer of a cable

Abstract

The utility model belongs to cable's water -based paint layer detection technical field, specifically is a kind of cable's water -based paint layer's fire resistance detection equipment, it include: shell, the side hinged of shell has cabinet door, cabinet door is fixedly connected with transparent plate, the inside wall of shell is symmetrically provided with connecting groove, the inside top surface of shell is screwd with telescopic cover, the side fixedly connected of telescopic cover with counterweight;Through the cooperation of first drive motor, winding frame's rotary rod, connecting rope and counterweight, the telescopic length of telescopic cover is adjusted, so that telescopic cover and cable combustion position always be in the best gas collection distance, to improve the gas collection intensity of harmful gas, avoid harmful gas to leak, through fan and suction pipe to collect harmful gas, in turn through filter screen and activated carbon sponge to purify harmful gas, to avoid the fire resistance detection of cable water -based paint layer, cause harm to human body, to improve the security of detection equipment use.

Description

Technical Field

[0001] This utility model belongs to the field of water-based paint layer testing technology for cables, specifically a fire resistance testing device for water-based paint layers of cables. Background Technology

[0002] Cable testing is a crucial step in ensuring cable quality and safety, involving various testing methods. One such method is the fire resistance test, which aims to simulate the fire resistance of the water-based paint layer on the cable surface under high-temperature conditions during a fire. This test determines whether the insulated cable can maintain continuous power supply when burned by flames, thus assessing its operational reliability. It is a key indicator of the performance of the cable's water-based paint layer, thereby requiring a fire resistance testing device for the cable's water-based paint layer.

[0003] A Chinese patent with authorization announcement number CN222506233U discloses a fire resistance testing device for insulated cables, including: a cabinet, a cabinet door, and cables. In this utility model, when the cabinet door is opened by a power source, the fuel supply of the flame-spraying device can be cut off to ensure external safety. When the cabinet door is closed, the fuel supply of the flame-spraying device is normal. Furthermore, when the cabinet door is open, the waste generated during the testing process can be collected and cleaned up quickly.

[0004] However, the above solution still has some problems. When the water-based paint layer on the surface of the cable is burned, it will continuously produce harmful gases. In order to avoid the harmful gases being released during the test and causing harm to the human body, a fire resistance testing device for the water-based paint layer of the cable is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies and address the problems of existing equipment, this utility model proposes a fire resistance testing device for water-based paint layers of cables.

[0006] The technical solution adopted by this utility model to solve its technical problem is a fire resistance testing device for water-based paint layers of cables, comprising: a shell, a door hinged to one side of the shell, a transparent plate fixedly connected to the door, symmetrically formed connecting grooves on the inner wall of the shell, a telescopic cover threadedly connected to the inner top surface of the shell, a counterweight fixedly connected to one side of the telescopic cover, a connecting rope connected to the upper surface of the counterweight, an L-shaped rod fixedly connected to one side of the telescopic cover, the L-shaped rod slidably connected inside the connecting groove, one end of the connecting rope connected to a cable take-up frame, and a first [unclear - possibly a device or component] installed on one side of the cable take-up frame. The first drive motor has its output end fixedly connected to the rotating rod inside the take-up frame. The top of the housing is threaded with an air suction pipe, one end of which extends into the interior of the telescopic cover, and the other end of which is threaded with a purification box. A fan is installed on one side of the purification box, and an exhaust port is opened on one side of the purification box. The interior of the purification box is equipped with activated carbon sponge and a filter screen. After being purified by the filter screen and activated carbon sponge, harmful gases are discharged to the outside through the exhaust port to avoid causing harm to the human body during the fire resistance test of the water-based paint layer of the cable, thereby improving the safety of the testing equipment.

[0007] Preferably, a second drive motor is installed on the top of the housing, and a bidirectional screw is fixedly connected to the output end of the second drive motor. One end of the bidirectional screw is rotatably connected to the inside of the housing, and an adjustment bracket is threaded onto the bidirectional screw. When the second drive motor runs, it drives the bidirectional screw to rotate. Because the adjustment bracket has an internal thread that matches the thread on the bidirectional screw, the rotation of the bidirectional screw can drive the adjustment bracket to move up and down along the bidirectional screw.

[0008] Preferably, a firearm is mounted on one side of the adjusting frame, and wind shields are symmetrically fixedly connected to one side of the adjusting frame. The wind shields are located on the upper and lower sides of the firearm. When the firearm moves, the airflow generated in the upper and lower directions is blocked by the wind shields, which prevents the wind from affecting the root of the flame. This ensures that the flame does not go out while maintaining the flame's natural shape.

[0009] Preferably, two sets of support frames are fixedly connected inside the outer shell. The support frames have a limiting groove inside and a threaded groove on their upper surface. A double-sided rack is slidably connected inside the support frames. A limiting rod is installed on the lower surface of the double-sided rack. The limiting rod is slidably connected inside the limiting groove. The movement range of the limiting rod is limited by the length of the limiting groove, thereby preventing the double-sided rack from falling off.

[0010] Preferably, the double-sided rack is threaded with bolts, which are threaded into the threaded grooves. Both sets of teeth on the double-sided rack are meshed with gears, and both sets of gears are rotatably connected inside the support frame. Clamping plates are symmetrically fixed to the two sets of gears. Because gears are meshed on both sides of the double-sided rack, when the double-sided rack moves, it can drive the gears to rotate, thereby adjusting the distance between the two sets of clamping plates.

[0011] Preferably, the testing equipment is equipped with an external controller, which is used to control the start and stop of the first drive motor, the fan, the second drive motor and the torch. By controlling the first drive motor, the fan, the second drive motor and the torch through the external controller, the ease of use of the testing equipment is improved.

[0012] The advantages of this invention are as follows: by cooperating with the first drive motor, the rotating rod of the take-up frame, the connecting rope, and the counterweight, the telescopic length of the telescopic cover is adjusted, ensuring that the telescopic cover and the burning position of the cable are always at the optimal gas collection distance, thereby improving the gas collection intensity of harmful gases and preventing their leakage. Harmful gases are collected by a fan and a suction pipe, and then purified by a filter and activated carbon sponge, thus avoiding harm to the human body during the fire resistance testing of the water-based paint layer of the cable, thereby improving the safety of the testing equipment.

[0013] This invention utilizes the cooperation of a second drive motor and a bidirectional screw to adjust the height of the flame gun, allowing different positions of the cable to periodically contact the flame. This avoids localized overheating of the cable, preventing false hot spots and eliminating deviations in the thermal accumulation of the cable's water-based paint layer. Simultaneously, as the flame gun moves, a wind shield blocks the gas at the base of the flame, ensuring the flame remains extinguished while maintaining its natural shape. By dynamically simulating a real fire scenario, this invention improves the comprehensiveness of the fire resistance testing of the cable's water-based paint layer. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure; Figure 2 This is a schematic diagram of the outer shell cross-section; Figure 3 This is a schematic diagram of the purification components; Figure 4 This is a schematic diagram of the adjustment components; Figure 5 This is a schematic diagram of a fixed component.

[0016] In the diagram: 1. Outer shell; 2. Door; 3. Transparent panel; 4. Connecting groove; 5. Telescopic cover; 6. Counterweight; 7. Connecting rope; 8. L-shaped rod; 9. Cable reel; 10. First drive motor; 11. Suction pipe; 12. Purification box; 13. Fan; 14. Activated carbon sponge; 15. Filter screen; 16. Second drive motor; 17. Bidirectional screw; 18. Adjustment frame; 19. Flamethrower; 20. Windproof cover; 21. Support frame; 22. Limiting groove; 23. Threaded groove; 24. Double-sided rack; 25. Bolt; 26. Gear; 27. Clamping plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0018] Please see Figure 1-5 As shown, a fire resistance testing device for water-based coatings of cables includes: a housing 1, a door 2 hinged to one side of the housing 1, a transparent plate 3 fixedly connected to the door 2, symmetrically arranged connecting grooves 4 on the inner wall of the housing 1, a telescopic cover 5 threadedly connected to the inner top surface of the housing 1, a counterweight 6 fixedly connected to one side of the telescopic cover 5, a connecting rope 7 connected to the upper surface of the counterweight 6, an L-shaped rod 8 fixedly connected to one side of the telescopic cover 5, the L-shaped rod 8 slidably connected inside the connecting groove 4, one end of the connecting rope 7 connected to a take-up frame 9, a first drive motor 10 installed on one side of the take-up frame 9, the output end of the first drive motor 10 fixedly connected to a rotating rod inside the take-up frame 9, and an air suction pipe 1 threadedly connected to the top of the housing 1. 1. One end of the suction pipe 11 extends into the interior of the telescopic cover 5, and the other end of the suction pipe 11 is threadedly connected to the purification box 12. A fan 13 is installed on one side of the purification box 12, and an exhaust port is opened on one side of the purification box 12. Activated carbon sponge 14 and filter screen 15 are installed inside the purification box 12. A second drive motor 16 is installed on the top of the outer shell 1. A bidirectional screw 17 is fixedly connected to the output end of the second drive motor 16. One end of the bidirectional screw 17 is rotatably connected to the interior of the outer shell 1. An adjustment frame 18 is threadedly connected to the bidirectional screw 17. A fire gun 19 is installed on one side of the adjustment frame 18. A windproof cover 20 is symmetrically fixedly connected to one side of the adjustment frame 18. The windproof covers 20 are located on the upper and lower sides of the fire gun 19, respectively. To simulate and test the fire resistance of the water-based paint layer on the surface of cables under high-temperature fire conditions, and to determine whether the insulated cable can maintain continuous power supply when burned by flames, thus assessing its operational reliability, a fire resistance testing device for the water-based paint layer of cables is needed. In practical use, after fixing both ends of the cable to be tested for fire resistance, the flame gun 19 and the second drive motor 16 are activated via an external controller. When the flame gun 19 operates, it sprays flames onto the cable, burning the water-based paint layer. The second drive motor 16 drives the bidirectional screw 17 to rotate, due to the adjustment frame 18... The internal thread matches the thread on the bidirectional screw 17, allowing the adjusting bracket 18 to move up and down along the screw 17 when the bidirectional screw 17 rotates. This adjusts the position of the flame gun 19, ensuring that different parts of the cable periodically contact the flame, preventing localized overheating and creating false hot spots. This also eliminates deviations in the heat accumulation of the water-based paint layer on the cable. Furthermore, when the flame gun 19 moves, the airflow generated in both directions is blocked by the wind shield 20, preventing wind from affecting the flame base. This ensures the flame remains extinguished while maintaining its natural shape, dynamically simulating a real fire scene. This improves the comprehensiveness of the inspection. During the inspection process, the fan 13 and the first drive motor 10 are started by an external controller. The first drive motor 10 drives the rotating rod of the take-up frame 9 to rotate, thereby adjusting the length of the connecting rope 7 wound on the rotating rod. When the torch 19 sprays flames at the lower position of the cable, the connecting rope 7 unwinds from the rotating rod of the take-up frame 9, shortening the winding length of the connecting rope 7 on the rotating rod. Under the weight of the counterweight 6, the telescopic cover 5 extends. When the torch 19 moves upward, the first drive motor 10 rotates in the opposite direction, driving the rotating rod on the take-up frame 9 to rotate and wind the connecting rope 7. The weight of the counterweight 6 causes the telescopic cover 5 to fold, shortening its overall length. By adjusting the extension length of the telescopic cover 5, the distance between the telescopic cover 5 and the burning position of the cable is always optimal, preventing the suction efficiency from decreasing due to excessive space or the flame combustion state from being too close. At the same time, the fan 13 operates, drawing the harmful gases collected in the telescopic cover 5 into the purification box 12 through the suction pipe 11. After being purified by the filter screen 15 and activated carbon sponge 14, the harmful gases are discharged out through the exhaust port, thus avoiding harm to the human body during the fire resistance test of the water-based paint layer of the cable, thereby improving the safety of the testing equipment.

[0019] Please see Figure 1-5As shown, two sets of support frames 21 are fixedly connected inside the outer casing 1. The support frame 21 has a limit groove 22 inside and a threaded groove 23 on its upper surface. A double-sided rack 24 is slidably connected inside the support frame 21. A limit rod is installed on the lower surface of the double-sided rack 24 and is slidably connected inside the limit groove 22. A bolt 25 is threadedly connected to the double-sided rack 24 and is threadedly connected to the threaded groove 23. Gears 26 are meshed on both sides of the teeth of the double-sided rack 24. Both sets of gears 26 are rotatably connected inside the support frame 21. Clamping plates 27 are symmetrically fixedly connected to the two sets of gears 26. The detection equipment is externally connected to a controller, which is used to control the start and stop of the first drive motor 10, the fan 13, the second drive motor 16 and the gun 19. Place one end of the cable to be tested between the two sets of clamps 27, and push the double-sided rack 24 backward. The teeth on both sides of the rack drive the gears 26 on both sides to rotate, causing the two sets of clamps 27 to move towards the center, so that both sets of clamps 27 are in contact with the cable surface. Then, screw the bolts 25 into the double-sided rack 24 and the threaded grooves 23. This fixes the position of the double-sided rack 24 and the gears 26 and clamps 27, ensuring that during testing, the two sets of clamps 27 can continuously apply external force to the cable, thereby testing one end of the cable. After securing the cable, pull the other end of the cable so that it is positioned between the two sets of clamps 27 of another set of fixing components. Repeat the above fixing steps to fix the cable inside the housing 1, so that the cable is in a vertical position during the testing process, avoiding the impact of cable wrinkles on the accuracy of the test data. After the test is completed, unscrew the bolt 25 and pull the double-sided rack 24 forward, so that the gears 26 on both sides rotate in opposite directions, which will drive the two sets of clamps 27 to move outward, thereby contacting the fixing of the cable, and then remove it.

[0020] The working principle is as follows: One end of the cable to be tested is placed between the two sets of clamping plates 27. Pushing the double-sided rack 24 backward causes its teeth to rotate, driving the gears 26 on both sides to move the two sets of clamping plates 27 towards the center, ensuring that both sets of clamping plates 27 are in contact with the cable surface. Then, bolts 25 are screwed into the double-sided rack 24 and the threaded groove 23 to ensure that the two sets of clamping plates 27 continuously apply external force to the cable during testing, thereby fixing one end of the cable. Finally, the other end of the cable is pulled, positioning it between the two sets of clamping plates 27 of another fixing component. Repeating the above fixing steps, the cable can be fixed inside the outer casing 1. The external controller starts the torch 19 and the second drive motor 16. When the torch 19 runs, it sprays flames onto the cable, burning the water-based paint layer. The second drive motor 16 drives the bidirectional screw 17 to rotate, which in turn moves the torch 19 synchronously, allowing different positions of the cable to periodically contact the flame. When the torch 19 moves, the airflow generated in its vertical direction is blocked by the wind shield 20, preventing wind from affecting the base of the flame. This ensures the flame does not extinguish while maintaining its natural shape, thus preventing localized overheating of the cable and avoiding false hot spots, thus eliminating deviations in the heat accumulation of the water-based paint layer. During the testing process, the external controller starts the fan 13 and the first drive motor 10. The first drive motor 10 drives the rotating rod of the take-up frame 9 to rotate, thereby adjusting the length of the connecting rope 7 wound on the rotating rod. Under the weight of the counterweight 6, the telescopic cover 5 extends and retracts, ensuring that the telescopic cover 5 is always at the optimal air collection distance from the cable's burning position. Simultaneously, the fan... 13. During operation, the harmful gas collected in the telescopic cover 5 is drawn into the purification box 12 through the suction pipe 11. After being purified by the filter screen 15 and activated carbon sponge 14, the harmful gas is discharged outward through the exhaust port to avoid harm to the human body during the fire resistance test of the water-based paint layer of the cable, thereby improving the safety of the testing equipment. After the test is completed, the bolt 25 is unscrewed and the double-sided rack 24 is pulled forward, so that the gears 26 on both sides rotate in opposite directions, which can drive the two sets of clamps 27 to move outward, thereby contacting the fixing of the cable and removing it.

[0021] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A fire resistance testing device for water-based coatings on cables, characterized in that: include: The outer shell (1) has a door (2) hinged to one side, and a transparent plate (3) fixedly connected to the door (2). The inner wall of the outer shell (1) has symmetrically arranged connecting grooves (4). A telescopic cover (5) is threaded onto the inner top surface of the outer shell (1). A counterweight (6) is fixedly connected to one side of the telescopic cover (5). A connecting rope (7) is connected to the upper surface of the counterweight (6). An L-shaped rod (8) is fixedly connected to one side of the telescopic cover (5). The L-shaped rod (8) is slidably connected inside the connecting groove (4). One end of the connecting rope (7) is connected to a take-up frame (9). A first drive motor (10) is installed on one side of the take-up frame (9). The output end of the first drive motor (10) is fixedly connected to the rotating rod inside the take-up frame (9). The top of the outer shell (1) is threadedly connected to an air suction pipe (11). One end of the air suction pipe (11) extends into the interior of the telescopic cover (5). The other end of the air suction pipe (11) is threadedly connected to a purification box (12). A fan (13) is installed on one side of the purification box (12). An exhaust port is opened on one side of the purification box (12). Activated carbon sponge (14) and filter screen (15) are installed inside the purification box (12).

2. The fire resistance testing equipment for water-based coatings of cables according to claim 1, characterized in that: A second drive motor (16) is installed on the top of the outer casing (1). A bidirectional screw (17) is fixedly connected to the output end of the second drive motor (16). One end of the bidirectional screw (17) is rotatably connected to the inside of the outer casing (1). An adjustment bracket (18) is threaded onto the bidirectional screw (17).

3. The fire resistance testing equipment for water-based coatings of cables according to claim 2, characterized in that: A musket (19) is mounted on one side of the adjusting frame (18), and a wind shield (20) is symmetrically fixedly connected to one side of the adjusting frame (18). The wind shield (20) is located on the upper and lower sides of the musket (19).

4. The fire resistance testing equipment for water-based coatings of cables according to claim 1, characterized in that: The outer shell (1) is fixedly connected to two sets of support frames (21). The support frame (21) has a limiting groove (22) inside. The upper surface of the support frame (21) has a threaded groove (23). The support frame (21) is slidably connected to a double-sided rack (24). The lower surface of the double-sided rack (24) is equipped with a limiting rod. The limiting rod is slidably connected inside the limiting groove (22).

5. The fire resistance testing equipment for water-based coatings of cables according to claim 4, characterized in that: The double-sided rack (24) is threaded with a bolt (25), which is threaded to the threaded groove (23). Both sets of teeth of the double-sided rack (24) are meshed with gears (26). Both sets of gears (26) are rotatably connected inside the support frame (21). The two sets of gears (26) are symmetrically fixed with clamps (27).

6. The fire resistance testing equipment for water-based coatings of cables according to claim 1, characterized in that: The testing equipment is connected to an external controller, which is used to control the start and stop of the first drive motor (10), the fan (13), the second drive motor (16) and the gun (19).

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