Wire and cable fire resistance test device

Abstract

The utility model relates to the technical field of test devices, and discloses a wire and cable fire resistance test device which comprises a bottom plate, a temporary storage assembly and two supporting columns are connected to the upper surface of the bottom plate, a reversing mechanism is connected between the two supporting columns, two connecting rings are connected to the output end of the reversing mechanism, and two rotating assemblies are connected to the outer walls of the two connecting rings. The other ends of the two rotating assemblies are both connected with a first elastic assembly and a second elastic assembly. According to the wire and cable fire resistance test device, after a wire and cable is subjected to a high-temperature combustion test, the tested wire and cable can be rotated to the temporary storage assembly to be temporarily stored, so that the subsequent combustion test can be continued, meanwhile, temporarily stored wire and cable cooling data can be monitored, and two purposes are achieved at one time; when the wire cable needs to be controlled to rotate, only the reversing mechanism needs to be started, reversing can be automatically achieved, and the direction is fast; the wire and cable needing a combustion test can be placed in the pay-off assembly more conveniently and quickly.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically a fire resistance testing device for wires and cables. Background Technology

[0002] Fire resistance testing of wires and cables is a test conducted on wire and cable products to evaluate their performance and safety under fire conditions. This test verifies whether wires and cables can maintain circuit integrity for a certain period of time under high temperature and flame conditions, ensuring that critical circuits (such as alarm systems and emergency lighting) can still work normally in the event of a fire, thereby protecting personnel safety and reducing property damage.

[0003] Patent CN214750058U discloses an automatic detection and alarm system for testing the fire resistance characteristics of electrical wires and cables. This system includes a sample support frame, a blowtorch, a fire source control system, a circuit control system, and a PLC control system. The blowtorch is connected to the fire source control system via a gas pipeline. The cable sample under test is connected to the circuit control system to form an energized circuit. The fire source control system and the circuit control system are respectively connected to the PLC control system. This automatic detection and alarm system for testing the fire resistance characteristics of electrical wires and cables can automatically adjust and monitor test parameters in real time, as well as automatically record and store test results. It can also automatically alarm for unqualified cable samples and promptly cut off the power supply and extinguish the blowtorch flame, improving testing efficiency while reducing the influence of human factors. Furthermore, it ensures the safety of the testing equipment and the testing process while improving the accuracy of test results.

[0004] However, the above-mentioned testing device still has the following problems in actual use:

[0005] During fire resistance testing of wires and cables, it is usually necessary to burn continuously for 90 minutes or even longer. After the test, some standards even require recording the cooling time and temperature change process. However, although the wires and cables have withstood the high temperature of the previous flame, their surface temperature is usually very high. Therefore, they usually need a long cooling time. During the cooling period, the test equipment will be occupied, which will prevent subsequent tests from being carried out, resulting in low efficiency. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a fire resistance testing device for wires and cables, which can automatically rotate the wires and cables to one side for temporary storage after the first fire resistance test, without occupying overall space.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a fire resistance testing device for wires and cables, comprising a base plate, a temporary storage component and two support columns connected to the upper surface of the base plate, a reversing mechanism connected between the two support columns, two connecting rings connected to the output end of the reversing mechanism, two rotating components connected to the outer walls of the two connecting rings, and a first elastic component and a second elastic component connected to the other end of each of the two rotating components, and a wire feeding component connected to the other end of the first elastic component and the second elastic component, wherein the temporary storage component and the wire feeding component are matched and aligned.

[0008] Furthermore, the temporary storage component includes a bracket and several temporary storage semi-rings. The lower end of the bracket is fixedly connected to the upper surface of the base plate, and the upper end of the bracket is fixedly connected to several temporary storage semi-rings. The several temporary storage semi-rings are arranged in parallel, and the wire feeding component matches the several temporary storage semi-rings.

[0009] Furthermore, the reversing mechanism includes a rotary motor and a transmission rod. The outer wall of the rotary motor is fixedly connected to the side wall of the upper end of one of the support columns. The output shaft of the rotary motor is fixedly connected to one end of the transmission rod. The other end of the transmission rod passes through the two support columns and the two connecting rings. The outer wall of the transmission rod is rotatably connected to the inner wall of the passage between the two support columns, and the outer wall of the transmission rod is fixedly connected to the inner wall of the passage between the two connecting rings.

[0010] Furthermore, the rotating assembly includes a connecting rod and two connecting bars. One end of the connecting rod is fixedly connected to the outer wall of the connecting ring, and one end of each of the two connecting bars is fixedly connected to the side wall of the connecting rod. The two connecting bars are located at both ends of the connecting rod and are arranged vertically. The end of the connecting rod away from the connecting ring is connected to the wire feeding assembly, and the two connecting bars are connected to the first elastic component and the second elastic component, respectively.

[0011] Furthermore, the wire-laying assembly includes a fixed block, a movable block, and a movable semi-ring. The fixed block, the movable block, and the movable semi-ring form a circle. The side wall of the fixed block is fixedly connected to the end of the connecting rod away from the connecting ring. The upper surface of the movable block abuts against the bottom surface of the fixed block, and the upper surface of the movable block is also connected to the connecting rod. One end of the movable semi-ring is connected to the end of the first elastic component away from the connecting bar, and the lower end of the movable block is connected to the end of the second elastic component away from the connecting bar.

[0012] Furthermore, the first elastic component includes a first rod and a first spring. One end of the first rod is fixedly connected to the end of the movable semi-ring near the fixed block. The other end of the first rod passes through the fixed block, the first spring, and one of the connecting strips. The outer wall of the first rod is slidably connected to the inner wall of the fixed block and the connecting strip at the point where they pass through. The two ends of the first spring are fixedly connected to the fixed block and the connecting strip, respectively.

[0013] Furthermore, the second elastic component includes a second rod and a second spring. One end of the second rod is fixedly connected to the side wall of the moving block away from the fixed block. The other end of the second rod passes through the second spring and the second connecting strip. The outer wall of the second rod is slidably connected to the inner wall of the connecting strip. The two ends of the second spring are fixedly connected to the moving block and the connecting strip, respectively.

[0014] Furthermore, a groove is provided on the side wall of the connecting rod, and a slider is fixedly connected to the side of the moving block near the fixed block. The outer wall of the slider is slidably connected to the inner wall of the groove.

[0015] Furthermore, a No. 1 magnet is fixedly connected to both sides of the movable block and the movable semi-ring at opposite ends. Four No. 2 magnets are fixedly connected to the upper surface of the support. Short strips are fixedly connected to the side of the two pillars near the support. A T-shaped strip is fixedly connected to the upper surface of the base plate. Four more No. 2 magnets are fixedly connected to the adjacent ends of the two short strips and the two ends of the T-shaped strip. Several No. 1 magnets are attracted to several No. 2 magnets respectively.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This type of fire resistance testing device for wires and cables, by setting a temporary storage component on the base plate, allows the tested wires and cables to be rotated onto the temporary storage component for temporary storage after the high-temperature combustion test, so that subsequent combustion tests can continue. At the same time, it can also monitor the cooling data of the temporarily stored wires and cables, achieving two goals at once.

[0018] 2. This type of fire resistance testing device for wires and cables has a reversing mechanism installed on the base plate support. When it is necessary to control the rotation of the wires and cables, simply activate the reversing mechanism to automatically achieve the reversal, which is quick and easy.

[0019] 3. This type of fire resistance testing device for wires and cables, by setting a rotating component and a wire feeding component at the output end of the reversing mechanism, can more conveniently and quickly place the wires and cables that need to be tested for combustion into the wire feeding component. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall appearance of the present utility model;

[0021] Figure 2 This is a schematic diagram illustrating one form of connection between the reversing mechanism and the rotating component of this utility model;

[0022] Figure 3 This is a schematic diagram illustrating another form of connection between the reversing mechanism and the rotating component of this utility model;

[0023] Figure 4 This is an exploded view of the reversing mechanism, rotating assembly, and two elastic components of this utility model.

[0024] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle;

[0025] Figure 6 This is a detailed connection diagram of the connecting ring and rotating assembly of this utility model.

[0026] In the diagram: 1. Base plate; 2. Support column; 3. Rotating motor; 4. Transmission rod; 5. Connecting ring; 6. Connecting rod; 7. Fixed block; 8. Moving block; 9. Moving half-ring; 10. Magnet No. 1; 11. Bracket; 12. Temporary half-ring; 13. Magnet No. 2; 14. Rod No. 1; 15. Spring No. 1; 16. Rod No. 2; 17. Spring No. 2; 18. Connecting bar; 19. Slider; 20. Slide groove; 21. Short bar; 22. T-shaped bar. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Please see Figures 1-6 A fire resistance testing device for wires and cables includes a base plate 1. A temporary storage component and two support columns 2 are connected to the upper surface of the base plate 1. A reversing mechanism is connected between the two support columns 2. Two connecting rings 5 ​​are connected to the output end of the reversing mechanism. Two rotating components are connected to the outer walls of the two connecting rings 5. The other end of each of the two rotating components is connected to a first elastic component and a second elastic component. The other end of the first elastic component and the second elastic component are simultaneously connected to a wire feeding component. The temporary storage component and the wire feeding component are matched and aligned.

[0029] like Figures 1 to 6 As shown, in the fire resistance testing device for wires and cables of this utility model, during the test, the two wire-laying assemblies located on the left side of the two support pillars 2 are first opened. Then, the first wire and cable to be tested is placed between the two wire-laying assemblies from below. After that, the wire and cable can be burned at high temperature by an external burner. After burning for a set time, the burner is turned off and removed (or the burner can remain in place, as long as it does not affect the placement of the second wire and cable).

[0030] After the burner is turned off, the reversing mechanism is activated. Once activated, the two wire feeding assemblies located on the left side of the support column 2 and the wires and cables inside the two wire feeding assemblies will be rotated from above the support column 2 to the right side of the support column 2. At the same time, the two wire feeding assemblies originally located on the right side of the support column 2 will also be rotated from below the support column 2 to the left side of the support column 2.

[0031] When the cable delivery assembly rotates to the right side of support post 2, the cable will rest on the temporary storage assembly for cooling. At this point, simply follow the steps described above to insert the second cable into the two cable delivery assemblies that have rotated to the left side of support post 2, and then burn it again through the burner. Since the cable burns for a period of time, the data on the cooling of the first cable can be monitored during the burning process, allowing for simultaneous operation and higher efficiency.

[0032] When the temperature of the first wire and cable drops to a value that no longer requires monitoring, and the wire and cable are no longer hot, the first wire and cable can be removed from the temporary storage assembly. Then, when the second wire and cable finish burning, the third wire and cable can be burned following the same steps.

[0033] As a preferred embodiment of the present invention, the temporary storage component includes a bracket 11 and a plurality of temporary storage semi-rings 12. The lower end of the bracket 11 is fixedly connected to the upper surface of the base plate 1, and the upper end of the bracket 11 is fixedly connected to the plurality of temporary storage semi-rings 12. The plurality of temporary storage semi-rings 12 are arranged in parallel, and the wire feeding component is matched with the plurality of temporary storage semi-rings 12.

[0034] More specifically, when the wire and cable rotate to the right side of the support 2, the wire and cable will fall on several temporary half-rings 12, thus supporting the wire and cable through the several temporary half-rings 12.

[0035] As a preferred embodiment of this utility model, the reversing mechanism includes a rotary motor 3 and a transmission rod 4. The outer wall of the rotary motor 3 is fixedly connected to the side wall of the upper end of one of the support columns 2. The output shaft of the rotary motor 3 is fixedly connected to one end of the transmission rod 4. The other end of the transmission rod 4 passes through the two support columns 2 and the two connecting rings 5. The outer wall of the transmission rod 4 and the inner wall of the passage of the two support columns 2 are rotatably connected. The outer wall of the transmission rod 4 and the inner wall of the passage of the two connecting rings 5 ​​are fixedly connected.

[0036] More specifically, when it is necessary to rotate the burned wires and cables from the left to the right, simply turn on the rotating motor 3. The output shaft of the rotating motor 3 will rotate the transmission rod 4, thereby causing the connecting ring 5 and the rotating assembly connected to the surface of the transmission rod 4 to rotate.

[0037] As a preferred embodiment of this utility model, the rotating assembly includes a connecting rod 6 and two connecting bars 18. One end of the connecting rod 6 is fixedly connected to the outer wall of the connecting ring 5, and one end of each of the two connecting bars 18 is fixedly connected to the side wall of the connecting rod 6. The two connecting bars 18 are located at the two ends of the connecting rod 6, and the two connecting bars 18 are arranged vertically. The end of the connecting rod 6 away from the connecting ring 5 is connected to the wire feeding assembly, and the two connecting bars 18 are connected to the first elastic assembly and the second elastic assembly, respectively.

[0038] More specifically, when the connecting ring 5 rotates, the connecting rod 6 and the two connecting bars 18 can rotate together, thereby causing the wire feeding assembly, the first elastic assembly and the second elastic assembly, which are respectively connected to the connecting rod 6 and the two connecting bars 18, to rotate together.

[0039] As a preferred embodiment of this utility model, the wire feeding assembly includes a fixed block 7, a movable block 8, and a movable semi-ring 9. The fixed block 7, the movable block 8, and the movable semi-ring 9 form a circle. The side wall of the fixed block 7 is fixedly connected to the end of the connecting rod 6 away from the connecting ring 5. The upper surface of the movable block 8 abuts against the bottom surface of the fixed block 7, and the upper surface of the movable block 8 is also connected to the connecting rod 6. One end of the movable semi-ring 9 is connected to the end of the first elastic component away from the connecting strip 18, and the lower end of the movable block 8 is connected to the end of the second elastic component away from the connecting strip 18.

[0040] More specifically, when the connecting rod 6 rotates, the fixed block 7 connected to the connecting rod 6 can rotate together. Similarly, the connecting rod 6 will rotate together with the first elastic component and the second elastic component through the two connecting strips 18.

[0041] In addition, when it is necessary to secure the wires and cables inside the circle formed by the fixed block 7, the movable block 8, and the movable semi-ring 9, simply pull the movable block 8 and the movable semi-ring 9 to both sides to expose an opening with the same diameter as the circle formed by the fixed block 7, the movable block 8, and the movable semi-ring 9. The wires and cables inside this circle can then be inserted. After releasing the movable block 8 and the movable semi-ring 9, the first elastic component and the second elastic component can reset the movable block 8 and the movable semi-ring 9, thereby securing the wires and cables in the middle.

[0042] As a preferred embodiment of this utility model, the first elastic component includes a first rod 14 and a first spring 15. One end of the first rod 14 is fixedly connected to the end of the movable semi-ring 9 near the fixed block 7. The other end of the first rod 14 passes through the fixed block 7, the first spring 15, and one of the connecting strips 18. The outer wall of the first rod 14 is slidably connected to the inner wall of the fixed block 7 and the connecting strip 18 at the point where they pass through. The two ends of the first spring 15 are fixedly connected to the fixed block 7 and the connecting strip 18, respectively. The second elastic component includes a second rod 16 and a second spring 17. One end of the second rod 16 is fixedly connected to the side wall of the movable block 8 away from the fixed block 7. The other end of the second rod 16 passes through the second spring 17 and the second connecting strip 18. The outer wall of the second rod 16 is slidably connected to the inner wall of the connecting strip 18. The two ends of the second spring 17 are fixedly connected to the movable block 8 and the connecting strip 18, respectively.

[0043] More specifically, when it is necessary to insert the wire or cable, simply pull the moving block 8 and the moving half-ring 9 to both sides. When the moving block 8 is pulled, it will cause the second rod 16 to compress the second spring 17. Similarly, when the moving half-ring 9 is pulled, it will cause the first rod 14 to compress the first spring 15. This will widen the opening between the moving block 8 and the moving half-ring 9. When the wire or cable is inserted into the circular opening between the moving block 8 and the moving half-ring 9, simply release the moving block 8 and the moving half-ring 9. At this time, the moving block 8 and the moving half-ring 9 will automatically reset under the action of the first spring 15 and the second spring 17.

[0044] As a preferred embodiment of this utility model, the side wall of the connecting rod 6 is provided with a sliding groove 20, and the side of the moving block 8 near the fixed block 7 is fixedly connected with a slider 19, and the outer wall of the slider 19 is slidably connected to the inner wall of the sliding groove 20.

[0045] More specifically, by setting the slider 19 and the groove 20, the connection between the moving block 8 and the connecting rod 6 can be increased firstly, preventing the moving block 8 from falling off from below; secondly, the moving block 8 can be guided when it moves.

[0046] As a preferred embodiment of this utility model, the movable block 8 and the movable semi-ring 9 are fixedly connected to the two sides of their respective ends away from each other by a first magnet 10. The upper surface of the support 11 is fixedly connected to four second magnets 13. The two pillars 2 are fixedly connected to the side of their respective sides near the support 11 by short strips 21. The upper surface of the base plate 1 is fixedly connected to a T-shaped strip 22. The adjacent ends of the two short strips 21 and the two ends of the T-shaped strip 22 are fixedly connected to four other second magnets 13. The first magnets 10 are attracted to the second magnets 13 respectively.

[0047] More specifically, by setting up magnet 10 and magnet 13, when the moving block 8 and the moving half-ring 9 are moved from the left side of the support column 2 to the right side, magnet 10 connected to the moving block 8 and the moving half-ring 9 will attract magnet 13, thereby forcibly pulling the moving block 8 and the moving half-ring 9 apart from both sides, making it easier to remove the wires and cables.

[0048] It should be noted that since the rotation of the moving block 8 and the moving half-ring 9 is driven by the rotating motor 3, as long as the force of the rotating motor 3 is greater than the attraction between the first magnet 10 and the second magnet 13, there will be no situation where they get stuck.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire resistance testing device for electric wires and cables, comprising a base plate (1), characterized in that: The upper surface of the base plate (1) is connected to a temporary storage component and two support columns (2). A reversing mechanism is connected between the two support columns (2). The output end of the reversing mechanism is connected to two connecting rings (5). The outer walls of the two connecting rings (5) are connected to two rotating components. The other end of each of the two rotating components is connected to a first elastic component and a second elastic component. The other end of the first elastic component and the second elastic component is simultaneously connected to a wire feeding component. The temporary storage component and the wire feeding component are matched and aligned.

2. The fire resistance testing device for wires and cables according to claim 1, characterized in that: The temporary storage component includes a bracket (11) and several temporary storage half rings (12). The lower end of the bracket (11) is fixedly connected to the upper surface of the base plate (1), and the upper end of the bracket (11) is fixedly connected to several temporary storage half rings (12). Several temporary storage half rings (12) are arranged in parallel, and the wire feeding component matches several temporary storage half rings (12).

3. The fire resistance testing device for wires and cables according to claim 1, characterized in that: The reversing mechanism includes a rotating motor (3) and a transmission rod (4). The outer wall of the rotating motor (3) is fixedly connected to the side wall of the upper end of one of the support columns (2). The output shaft of the rotating motor (3) is fixedly connected to one end of the transmission rod (4). The other end of the transmission rod (4) passes through the two support columns (2) and the two connecting rings (5). The outer wall of the transmission rod (4) and the inner wall of the passage between the two support columns (2) are rotatably connected. The outer wall of the transmission rod (4) and the inner wall of the passage between the two connecting rings (5) are fixedly connected.

4. The fire resistance testing device for wires and cables according to claim 2, characterized in that: The rotating assembly includes a connecting rod (6) and two connecting strips (18). One end of the connecting rod (6) is fixedly connected to the outer wall of the connecting ring (5). One end of each of the two connecting strips (18) is fixedly connected to the side wall of the connecting rod (6). The two connecting strips (18) are located at the two ends of the connecting rod (6) respectively. The two connecting strips (18) are arranged vertically. The end of the connecting rod (6) away from the connecting ring (5) is connected to the wire feeding assembly. The two connecting strips (18) are connected to the first elastic assembly and the second elastic assembly respectively.

5. The fire resistance testing device for wires and cables according to claim 4, characterized in that: The wire feeding assembly includes a fixed block (7), a movable block (8), and a movable half-ring (9). The fixed block (7), the movable block (8), and the movable half-ring (9) form a circle. The side wall of the fixed block (7) is fixedly connected to the end of the connecting rod (6) away from the connecting ring (5). The upper surface of the movable block (8) abuts against the bottom surface of the fixed block (7), and the upper surface of the movable block (8) is also connected to the connecting rod (6). One end of the movable half-ring (9) is connected to the end of the first elastic component away from the connecting strip (18), and the lower end of the movable block (8) is connected to the end of the second elastic component away from the connecting strip (18).

6. The fire resistance testing device for wires and cables according to claim 5, characterized in that: The first elastic component includes a first rod (14) and a first spring (15). One end of the first rod (14) is fixedly connected to the end of the movable half ring (9) near the fixed block (7). The other end of the first rod (14) passes through the fixed block (7), the first spring (15) and one of the connecting strips (18). The outer wall of the first rod (14) and the inner wall of the fixed block (7) and the connecting strip (18) are slidably connected. The two ends of the first spring (15) are fixedly connected to the fixed block (7) and the connecting strip (18) respectively.

7. The fire resistance testing device for wires and cables according to claim 5, characterized in that: The second elastic component includes a second rod (16) and a second spring (17). One end of the second rod (16) is fixedly connected to the side wall of the moving block (8) away from the fixed block (7). The other end of the second rod (16) passes through the second spring (17) and the second connecting strip (18). The outer wall of the second rod (16) is slidably connected to the inner wall of the connecting strip (18). The two ends of the second spring (17) are fixedly connected to the moving block (8) and the connecting strip (18) respectively.

8. The fire resistance testing device for wires and cables according to claim 5, characterized in that: The side wall of the connecting rod (6) is provided with a sliding groove (20), and the movable block (8) is fixedly connected to a slider (19) on the side near the fixed block (7). The outer wall of the slider (19) is slidably connected to the inner wall of the sliding groove (20).

9. The fire resistance testing device for wires and cables according to claim 5, characterized in that: The movable block (8) and the movable semi-ring (9) are fixedly connected to two sides of each other at opposite ends. Four second magnets (13) are fixedly connected to the upper surface of the support (11). Short strips (21) are fixedly connected to the side of the two pillars (2) near the support (11). T-shaped strips (22) are fixedly connected to the upper surface of the base plate (1). Four other second magnets (13) are fixedly connected to the adjacent ends of the two short strips (21) and the two ends of the T-shaped strips (22). Several first magnets (10) are attracted to several second magnets (13) respectively.

Images