A kind of ship fire-resistant cable toughness detection device

Abstract

The utility model discloses a kind of fire-resistant cable tenacity detection devices for warship, belong to cable detection device technical field, it includes base, the base top is fixedly connected with detection box, the base top is located the side of the detection box and is provided with fuel storage tank, the detection box inner top is fixedly connected with connecting block, the connecting block bottom is integrally formed with conical boss;The utility model is simulated by through fire mechanism high temperature of fire, electric push rod and conical boss simulate cabin extrusion bending, motor and screw rod cooperate simulation drag displacement, again combining water delivery pipe and drain sprinkler cold and hot alternation of fire-fighting sprinkling, reduce the harm to environment and operator, reinforced device high-temperature resistance of reinforced concrete base, fireproof ceramic plate etc., stainless steel protective shell and soundproof cotton reduce motor operating noise and high temperature influence, ventilation opening guarantee air circulation in box, both improve the stability of detection process, meet safety environmental protection specification, facilitate efficient batch detection.

Description

Technical Field

[0001] This utility model belongs to the technical field of cable testing devices, specifically a toughness testing device for fire-resistant cables used in ships. Background Technology

[0002] Fire-resistant cables for ships serve as the "lifeline" of ship electrical systems and key equipment. Their toughness and reliability in extreme environments such as fires are directly related to the navigation safety of ships. With the development of the shipbuilding industry, the performance requirements for fire-resistant cables are becoming increasingly stringent. They not only need to maintain circuit integrity in high-temperature flames, but also need to withstand complex working conditions such as mechanical stress and alternating hot and cold shocks during the fire process.

[0003] According to a search, patent document CN 221707387 U discloses a cable fire resistance testing device, including a housing. The front of the housing has an openable door with an observation window. The back of the housing has an opening with a detachable back plate. The back plate has a clamping assembly. Both sides of the housing have ventilation openings and cable channels connecting to the opening. Several flame jet heads are installed inside the housing. This cable fire resistance testing device, by using a back plate and a clamping assembly on it, allows the back plate to be removed from the housing in advance. The cable can then be installed and fixed outside the housing and then installed into the housing along with the back plate. During the continuous testing and replacement of multiple cables, there is no need to wait for the housing to cool down before installation, effectively improving the testing and installation efficiency.

[0004] The aforementioned comparative documents also have the following shortcomings: On the one hand, the cable is in a static fixed state during the testing process, which can only simulate a simple high-temperature environment and cannot reproduce the dynamic mechanical stress such as axial tension, bending and compression caused by hull vibration, equipment collapse or personnel dragging during ship fire. As a result, the test results are difficult to reflect the toughness performance of the cable in actual service. On the other hand, it did not consider the typical scenario of "scorching at high temperatures and then suddenly encountering fire sprinklers" in ship fire rescue, and lacked assessment of the cracking or detachment of cable insulation and sheath under alternating hot and cold impacts. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a toughness testing device for fire-resistant cables used in ships, which solves two key deficiencies in the prior art cable fire resistance testing: First, the cable is statically fixed during testing, which can only simulate a simple high-temperature environment and cannot reproduce the dynamic mechanical stresses such as axial tension, bending and compression caused by ship vibration, equipment collapse or personnel dragging during a ship fire, making it difficult for the test results to reflect the toughness performance of the cable in actual service; Second, it does not consider the typical scenario of "suddenly encountering fire sprinkler after being burned at high temperature" in ship fire rescue, and lacks the assessment of the cracking or detachment of the cable insulation layer and sheath under alternating hot and cold impacts.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a toughness testing device for fire-resistant cables used in ships, comprising a base and a protective shell. A testing box is fixedly connected to the top of the base. A movable opening is provided on one side of the testing box. A movable plate is slidably fitted inside the movable opening. A movable rod is fixedly installed at the bottom of the movable plate. A motor is fixedly connected to the side of the base away from the movable plate. A lead screw is coaxially fixedly connected to the output end of the motor. The movable rod is threadedly connected to the lead screw. A movable block is slidably connected inside the movable plate. An electric pusher is provided on the top of the movable plate. The rod, the electric push rod is fixedly connected to the movable block, the inner side of the movable block is fixedly connected to a support frame, the support frame is rotatably connected to a wire clamping block in a symmetrical structure, the two ends of the wire clamping block are fixedly connected to adjusting bolts, the adjusting bolts are threadedly connected to the support frame, the wire clamping block is provided with a wire through hole, the top of the base is located on one side of the detection box and a fuel storage tank is provided, the bottom of the detection box is provided with a flame-throwing mechanism used in conjunction with the fuel storage tank, the top of the detection box is fixedly connected to a connecting block, the bottom of the connecting block is integrally formed with a conical protrusion.

[0007] As a further embodiment of this utility model: a water supply pipe is fixedly connected to one side of the detection box, and a drain pipe is connected to the inner side of the water supply pipe in a symmetrical structure. Multiple sets of drain nozzles are connected to the outer side of the drain pipe. The included angle between the drain nozzles is an inverted V-shape. The water spray direction of the drain nozzles is obliquely aligned with the central axis of the through hole, and a flow control valve is installed in series on the water supply pipe.

[0008] As a further embodiment of this utility model: a filter mechanism is installed on the top of the detection box, and an exhaust port for use with the filter mechanism is opened on the top of the detection box. The filter mechanism is provided with a metal mesh filter layer, an activated carbon adsorption layer and a ceramic fiber filter layer from bottom to top.

[0009] As a further embodiment of this utility model, a ventilation opening is provided on the side of the detection box away from the movable plate.

[0010] As a further embodiment of this utility model: the base is made of reinforced concrete, and its top surface is covered with fireproof ceramic plate. The protective shell is made of stainless steel, and its inner sidewall is covered with sound insulation cotton. The protective shell has heat dissipation holes at the position corresponding to the motor.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The test simulates the high temperature of a fire by using a flame-spraying mechanism, simulates the squeezing and bending inside the cabin by using an electric push rod and a conical protrusion, simulates the dragging displacement by using a motor and a lead screw, and combines water supply pipes and drainage nozzles to reproduce the hot and cold alternation of fire sprinklers. This multi-dimensional simulation of the actual stress and environmental changes of cables in ship fires ensures that the test results can accurately reflect the actual withstand capacity of the cables.

[0012] 2. The multi-stage filtration system purifies the flue gas generated during testing, reducing harm to the environment and operators. The reinforced concrete base and fireproof ceramic plate enhance the high-temperature resistance of the device. The stainless steel protective shell and sound insulation cotton reduce motor noise and the impact of high temperatures. The ventilation openings ensure air circulation inside the chamber, which not only improves the stability of the testing process but also meets safety and environmental protection standards, facilitating efficient batch testing. Attached Figure Description

[0013] Figure 1 This is a first-view schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a second-view schematic diagram of the overall structure of this utility model.

[0015] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 4 This is a schematic diagram of the internal structure of the testing box of this utility model.

[0017] Figure 5 For the present utility model Figure 3 A magnified view of a portion of point A in the middle.

[0018] In the diagram: 1. Base; 2. Detection box; 3. Movable plate; 4. Ventilation opening; 5. Fuel storage tank; 6. Flame-emitting mechanism; 7. Water supply pipe; 8. Drainage pipe; 9. Drainage nozzle; 10. Filtering mechanism; 11. Electric push rod; 12. Movable block; 13. Support frame; 14. Cable clamping block; 15. Adjusting bolt; 16. Motor; 17. Lead screw; 18. Movable rod; 19. Connecting block; 20. Protrusion. Detailed Implementation

[0019] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0020] like Figures 1-5 As shown, this utility model provides a technical solution: A device for testing the toughness of fire-resistant cables for ships includes a base 1 and a protective shell. A testing box 2 is fixedly connected to the top of the base 1. A movable opening is provided on one side of the testing box 2, and a movable plate 3 is slidably fitted inside the opening. A movable rod 18 is fixedly installed at the bottom of the movable plate 3. A motor 16 is fixedly connected to the side of the base 1 away from the movable plate 3. A lead screw 17 is coaxially fixedly connected to the output end of the motor 16. The movable rod 18 is threadedly connected to the lead screw 17. A movable block 12 is slidably connected inside the movable plate 3. An electric push rod 11 is provided on the top of the movable plate 3. The electric push rod 11 and the movable block... 12 fixed connection, a support frame 13 is fixedly connected to the inner side of the movable block 12, a wire clamping block 14 is rotatably connected in a symmetrical structure inside the support frame 13, an adjusting bolt 15 is fixedly connected to both ends of the wire clamping block 14, the adjusting bolt 15 is threadedly connected to the support frame 13, a wire through hole is provided inside the wire clamping block 14, a fuel storage tank 5 is provided on the top of the base 1 on one side of the detection box 2, a flame-throwing mechanism 6 for use with the fuel storage tank 5 is provided at the bottom inside the detection box 2, a connecting block 19 is fixedly connected to the top inside the detection box 2, and a conical protrusion 20 is integrally formed at the bottom of the connecting block 19; Specifically, in use, the motor 16 and the lead screw 17 work together to drive the movable rod 18 to move the movable plate 3 and the support frame 13 out of the test box 2, making it easier to load and unload cables. Then, the cable is passed through the cable hole and through the cable clamping block 14. The adjusting bolt 15 is rotated to make the cable clamping block 14 rotate, so that the two ends of the cable are wrapped around the outside of the cable clamping block 14 for fixation. Then, the motor 16 and the lead screw 17 work together to push the support frame 13 into the test box 2. Then, the fuel storage tank 5 and the flame spraying mechanism 6 work together to spray flames onto the cable. The cable is observed through the observation window on the other side of the test box 2 to determine whether the cable breaks at high temperature, so as to test its fire resistance performance. Then, the electric push rod 11 is activated to push the movable block 12 to move up and down along the movable plate 3, so that the cable contacts the conical protrusion 20 on the top of the test box 2 and generates bending stress, simulating the situation where the cable is squeezed and bent in the chamber, thereby comprehensively testing the toughness of the cable under high temperature and bending and squeezing. The support frame 13 can be flexibly moved out and pushed forward by the cooperation of motor 16 and lead screw 17, which greatly facilitates the loading and unloading of cables and makes the operation more convenient. The flame-spraying mechanism 6 can simulate the high temperature environment of a fire, and at the same time, the electric push rod 11 and the conical protrusion 20 can simulate the working condition of the cable being squeezed and bent in the ship's cabin, making the test closer to the actual use scenario of ship cables, and the test results are more reliable. It can effectively evaluate the fire resistance and toughness of the cable in extreme environments and ensure the safe use of ship cables. A water supply pipe 7 is fixedly connected to one side of the test box 2. A drain pipe 8 is symmetrically connected to the inside of the water supply pipe 7. Multiple sets of drain nozzles 9 are connected to the outside of the drain pipe 8. The included angle between the drain nozzles 9 is an inverted V-shape. The water spray direction of the drain nozzles 9 is obliquely aligned with the central axis of the through hole. A flow control valve is connected in series on the water supply pipe 7. A filter mechanism 10 is installed on the top of the test box 2. An exhaust port for use with the filter mechanism 10 is opened on the top of the test box 2. The filter mechanism 10 has a metal mesh filter layer, an activated carbon adsorption layer and a ceramic fiber filter layer arranged from bottom to top. A ventilation opening 4 is opened on the side of the test box 2 away from the movable plate 3. The base 1 is made of reinforced concrete. Its top surface is covered with a fireproof ceramic plate. The protective shell is made of stainless steel. Sound insulation cotton is pasted on its inner wall. A heat dissipation hole is opened on the protective shell corresponding to the position of the motor 16. Specifically, during use, after the flame-spraying mechanism 6 burns the cable at high temperature for a period of time, the flow control valve on the water supply pipe 7 is opened, and water enters the symmetrically connected drain pipe 8 through the water supply pipe 7, and then sprays out through multiple sets of drain nozzles 9 arranged in an inverted V-shape with the spray direction obliquely aligned with the central axis of the cable hole, precisely acting on the cable after it has been burned, simulating the alternating hot and cold scenario of the cable experiencing high temperature burning and then encountering fire sprinkler in a ship fire. During the test, the smoke generated inside the box enters the filter mechanism 10 through the top exhaust port, and passes through the metal mesh filter layer, activated carbon adsorption layer and ceramic fiber filter layer in sequence, achieving multi-stage filtration of smoke and harmful gases before being discharged. At the same time, the ventilation port 4 can adjust the air circulation inside the box to avoid smoke accumulation affecting observation. The stainless steel material of the protective shell and the inner sound insulation cotton can reduce the noise and high temperature impact of the motor 16 during operation, while the heat dissipation holes ensure the heat dissipation of the motor 16. The reinforced concrete base 1 and the top fireproof ceramic plate enhance the overall high temperature resistance. The inverted V-shaped drainage nozzle 9 can cover the fire-affected area of ​​the cable in all directions. With the flow control valve, the amount and intensity of water spray can be precisely controlled, realistically replicating the impact of alternating hot and cold on the fire-resistant layer of the cable. This is more in line with the actual fire rescue scenario on ships. The filtration mechanism 10 effectively purifies the smoke, reducing harm to the environment and operators. The detailed design of the ventilation port 4 and the protective shell improves the safety, stability and environmental protection of the testing process, ensuring that the test is carried out efficiently and in compliance with regulations. The working principle of this utility model is as follows: First, with the transmission cooperation of motor 16 and lead screw 17, the movable rod 18, movable plate 3 and support frame 13 are driven to move out and push the test box 2 in a flexible manner. By rotating the adjusting bolt 15, the cable clamping block 14 fixes the cable, providing a stable sample installation base for subsequent testing, while meeting the loading and unloading requirements of cables of different diameters, ensuring convenient and efficient operation in the initial stage of testing. Secondly, the fuel storage tank 5 is used to power the flame-spraying mechanism 6, which burns the cable in the test box 2 at high temperature to simulate the fire environment of a ship. At the same time, the electric push rod 11 is activated to push the movable block 12 to move up and down, so that the cable comes into contact with the conical protrusion 20 and generates bending stress. Combined with the axial displacement achieved by the motor 16, the complex working conditions of the cable being squeezed, bent and dragged at high temperature are reproduced, thereby testing its fire resistance and toughness. It is worth mentioning that, through the cooperation of water supply pipe 7, drainage pipe 8 and inverted V-shaped drainage nozzle 9, cold water is sprayed out after the cable is burned at high temperature. The flow control valve is used to precisely control the water volume, simulating the alternating hot and cold impact brought by fire sprinkler, which is closer to the actual fire rescue scenario. At the same time, the ventilation port 4 regulates the air circulation in the box to avoid smoke interfering with observation. Finally, the flue gas generated during the testing process enters the filtration mechanism 10 through the exhaust port, and is purified through multiple stages by passing through the metal mesh, activated carbon, and ceramic fiber filter layer. Combined with the reinforced concrete base 1, fireproof ceramic plate, stainless steel protective shell and other structures, the device is guaranteed to be resistant to high temperature, corrosion and low noise operation, while reducing harm to the environment and operators, and ensuring that the entire testing process is safe, environmentally friendly and efficient.

[0021] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A device for testing the toughness of fire-resistant cables for ships, comprising a base (1) and a protective shell, characterized in that: A detection box (2) is fixedly connected to the top of the base (1). A movable opening is provided on one side of the detection box (2). A movable plate (3) is slidably fitted inside the movable opening. A movable rod (18) is fixedly installed at the bottom of the movable plate (3). A motor (16) is fixedly connected to the side of the base (1) away from the movable plate (3). A lead screw (17) is coaxially fixedly connected to the output end of the motor (16). The movable rod (18) is threadedly connected to the lead screw (17). A movable block (12) is slidably connected inside the movable plate (3). An electric push rod (11) is provided on the top of the movable plate (3). The electric push rod (11) is fixedly connected to the movable block (12). (12) A support frame (13) is fixedly connected to the inside. A wire clamping block (14) is rotatably connected in a symmetrical structure inside the support frame (13). An adjusting bolt (15) is fixedly connected to both ends of the wire clamping block (14). The adjusting bolt (15) is threadedly connected to the support frame (13). A wire through hole is provided inside the wire clamping block (14). A fuel storage tank (5) is provided on the top of the base (1) on one side of the detection box (2). A flame-throwing mechanism (6) is provided at the bottom of the detection box (2) to cooperate with the fuel storage tank (5). A connecting block (19) is fixedly connected to the top of the detection box (2). A conical protrusion (20) is integrally formed at the bottom of the connecting block (19).

2. The toughness testing device for fire-resistant cables used in ships according to claim 1, characterized in that: A water supply pipe (7) is fixedly connected to one side of the test box (2). A drain pipe (8) is connected to the inside of the water supply pipe (7) in a symmetrical structure. Multiple sets of drain nozzles (9) are connected to the outside of the drain pipe (8). The included angle between the drain nozzles (9) is an inverted V-shape. The water spraying direction of the drain nozzles (9) is obliquely aligned with the central axis of the through hole. A flow control valve is installed in series on the water supply pipe (7).

3. The toughness testing device for fire-resistant cables used in ships according to claim 1, characterized in that: The top of the test box (2) is equipped with a filter mechanism (10). The top of the test box (2) is provided with an exhaust port for use with the filter mechanism (10). The filter mechanism (10) is provided with a metal mesh filter layer, an activated carbon adsorption layer and a ceramic fiber filter layer from bottom to top.

4. The toughness testing device for fire-resistant cables used in ships according to claim 1, characterized in that: The detection box (2) has a ventilation opening (4) on the side away from the movable plate (3).

5. The toughness testing device for fire-resistant cables used in ships according to claim 1, characterized in that: The base (1) is made of reinforced concrete, and its top surface is covered with fireproof ceramic plate. The protective shell is made of stainless steel, and its inner side wall is covered with sound insulation cotton. The protective shell has heat dissipation holes at the position corresponding to the motor (16).

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