A fire resistance testing device for special cable processing

Abstract

The application relates to a fire-resistant test device for special cable processing, and belongs to the technical field of cable processing. The device comprises a supporting base, the top of the supporting base is provided with a test bin, the outer wall of the test bin is provided with a gas delivery pipe, the outer wall of the gas delivery pipe is fixedly connected with a gas branch pipe extending into the test bin, and the outer wall of the gas branch pipe is fixedly connected with a gas nozzle; the outer wall of the supporting base is fixedly connected with a limiting block, and the outer wall of the limiting block is inserted with a cable main body penetrating through the outer wall of the test bin. Through the cooperation of the traction block, the clamping block and the connecting block, when the special cable is inserted into the test bin for the fire-resistant test, the cable is fixed on the top of the traction block through the clamping block, the traction block is driven to slide, the cable is given for the fire-resistant test, the effect of the cable in the feeding and laying process is simulated, the test operation of the cable at different positions is adjusted, and the precision of the fire-resistant test data of the cable is improved.

Description

Technical Field

[0001] This invention relates to the field of cable processing technology, and more specifically, to a fire resistance testing device for processing special cables. Background Technology

[0002] Fire-resistant cables are cables that can maintain safe operation for a certain period of time under flame combustion conditions. my country's national standard GB12666.6 (equivalent to IEC331) classifies fire resistance tests into two levels, A and B. Level A has a flame temperature of 950–1000°C and a continuous fire time of 90 minutes; Level B has a flame temperature of 750–800°C and a continuous fire time of 90 minutes. Throughout the test, the sample should withstand the rated voltage specified by the product. Fire-resistant cables are widely used in high-rise buildings, subways, underground streets, large power plants, and important industrial and mining enterprises—places related to fire safety and fire rescue. For example, they are used for power supply and control circuits of fire-fighting equipment and emergency facilities such as emergency guide lights. Therefore, fire resistance tests are conducted on these special cables using fire-resistant testing equipment.

[0003] In the prior art, a fire resistance testing device for cable processing, with publication number CN214252170U, includes a housing. Support legs are provided at the four corners of the housing, and base plates are provided at the bottom of the support legs. An observation window is provided on the front side of the housing, and connecting plates are provided on both sides of the housing. Cable fixing boxes are provided on the connecting plates. A hinge is provided on one side of the cable fixing box, and a mounting plate is provided on the other side. Fixing bolts are provided on the mounting plate. This invention, by providing connecting plates and cable fixing boxes, facilitates opening the upper end of the cable fixing box to fix the cable inside the box. The mounting plate is connected and fixed by fixing bolts, so that both ends of the cable are horizontally suspended inside the housing. Simultaneously, anti-slip pads are provided inside the cable fixing box, further enhancing the stability of the cable and facilitating fire resistance testing.

[0004] However, while existing cable fire resistance testing devices can effectively fix cables for fire resistance testing, the testing location is relatively fixed after cable fixation. Fire resistance tests are often performed on specific locations and lengths of the cable, which is not very effective for feeding the cable into the fire resistance device. This reduces the accuracy of comprehensive fire resistance test data. Furthermore, the device is not efficient at simultaneously scraping and collecting impurities accumulated at the bottom of the test chamber during the feeding fire resistance test. Additionally, when the top of the test chamber is opened, the device is not efficient at simultaneously recovering and purifying the hot air diffused from the top and sides, which can easily cause burns to nearby personnel due to excessive heat. Therefore, this device does not meet user needs. To address these issues, we propose a fire resistance testing device for special cable processing. Summary of the Invention

[0005] To address the problems mentioned in the background, this invention provides a fire resistance testing device for special cable processing. This addresses the issues raised in the background art, such as the ineffectiveness of fire resistance testing on cables at specific locations and lengths, the poor efficiency in simultaneously scraping and collecting impurities accumulated at the bottom of the test chamber, and the ineffectiveness in simultaneously recovering and purifying hot air diffused from the top and sides of the test chamber when the top is opened.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A fire resistance testing device for special cable processing includes a support base, a test chamber is provided on the top of the support base, a gas delivery pipe is provided on the outer wall of the test chamber, a gas branch pipe extending into the test chamber is fixedly connected to the outer wall of the gas delivery pipe, and a gas nozzle is fixedly connected to the outer wall of the gas branch pipe.

[0008] The outer wall of the support base is fixedly connected to a limiting block, and the outer wall of the limiting block is inserted with a cable body that passes through the outer wall of the test chamber. Connection holes are opened at the connection points between the test chamber and the cable body at both ends.

[0009] The outer wall of the support base is slidably connected to a traction block, the top of the traction block is slidably connected to a clamping block that fits against the outer wall of the cable body, the outer wall of the traction block is fixedly connected to a sliding rod that is slidably connected to the outer wall of the test chamber, one end of the sliding rod is fixedly connected to a connecting block that fits against the outer wall of the cable body, and the outer wall of the connecting block is fixedly connected to a scraper that fits against the bottom of the inner cavity of the test chamber.

[0010] A fixed column is fixedly connected to the outer wall of the connecting block, and a connecting rod is slidably connected to the outer wall of the fixed column. A pulling rod is rotatably connected to one end of the connecting rod, and a flip plate that is rotatably connected to the bottom of the support base is rotatably connected to one end of the pulling rod.

[0011] Preferably, the outer wall of the test chamber is provided with an observation window made of transparent material, the outer wall of the support base is provided with an electric push rod fixedly connected to the outer wall of the traction block, and the clamping block slides relative to the top of the traction block through a bidirectional screw.

[0012] Preferably, the outer wall of the connecting rod is provided with a groove at the connection between it and the fixed column, and the bottom of the support base is provided with a discharge port at the connection between it and the flip plate.

[0013] Preferably, the bottom of the support base is slidably connected to a collection box located below the discharge port, and two sets of connecting rods are provided, with the positions of the two sets of connecting rods being symmetrical about the central axis of the connecting block.

[0014] Preferably, a motor is installed on the outer wall of the test chamber, and a bevel gear set is fixedly connected to the output end of the motor. A rotating shaft is fixedly connected to the outer wall of the bevel gear set, and a connecting hinge is fixedly connected to the outer wall of the rotating shaft. A sealing cover rotatably connected to the outer wall of the connecting hinge is fixedly connected to the outer wall of the test chamber. A connecting through hole is opened on the inner side wall of the sealing cover, and a main fume hood located on one side of the connecting through hole is fixedly connected to the outer wall of the sealing cover. Connecting side plates are provided on both sides of the sealing cover on the side wall of the test chamber. Through the cooperative use of the traction block, clamping block, and connecting block, the special cable is inserted into the test chamber for endurance testing. During the fire test, the cable is fixed to the top of the traction block by the clamping block, and the traction block is driven to slide to conduct a feeding and combustion fire resistance test on the cable, simulating the effect of the cable during the feeding and laying process. The test operation is adjusted at different positions of the cable to improve the accuracy of the cable fire resistance test data. Through the coordinated use of scraper, pull rod, flip plate, debris discharge port and collection box, when the traction block drives the scraper to slide synchronously, the pull rod drives the flip plate to rotate, so that the scraper can scrape off the burning debris synchronously. With the debris discharge port open, the scraped debris automatically falls into the collection box, improving the multi-functionality of the test device for cable fire resistance testing.

[0015] Preferably, a smoke pipe is fixedly connected to the outer wall of the main smoke hood, one end of the smoke pipe is fixedly connected to a first filter box via a connecting pump, an electrostatic dust removal box is fixedly connected to the outer wall of the first filter box via a connecting pipe, and an exhaust pipe is fixedly connected to the outer wall of the electrostatic dust removal box via a connecting pump.

[0016] Preferably, the outer wall of the bevel gear set is fixedly connected to a threaded rod that is rotatably connected to the side wall of the test chamber, and the outer wall of the threaded rod is threadedly connected to a lifting block that is fixedly connected to the bottom of the connecting side plate.

[0017] Preferably, the lifting block and the test chamber are slidably connected. The side wall of the test chamber and the connection part of the lifting block are provided with a lifting groove. The top of the lifting block is fixedly connected to a connecting side plate. The outer wall of the connecting side plate is fixedly connected to a secondary smoke hood. The outer wall of the secondary smoke hood is fixedly connected to a second filter box through a connecting pipe. The outer wall of the second filter box is fixedly connected to a smoke delivery pipe that is fixedly connected to the outer wall of the electrostatic precipitator through a connecting pump.

[0018] Preferably, the connecting hole is located on the descending path of the connecting side plate, and there is a one-to-one correspondence between the connecting side plate and the connecting hole.

[0019] Preferably, the bevel gear set is provided in two sets, and the two sets of bevel gear sets rotate in the same direction.

[0020] Compared with the prior art, the beneficial effects of this invention are as follows:

[0021] 1. This invention, through the combined use of a traction block, a clamping block, and a connecting block, enables special cables to be fixed to the top of the traction block by the clamping block when inserted into the test chamber for fire resistance testing. The traction block is then driven to slide, and the cable is fed into a combustion fire resistance test, simulating the effect of the cable during the feeding and laying process. The test operation is adjusted at different positions of the cable, thereby improving the accuracy of the cable fire resistance test data.

[0022] 2. This invention utilizes the combined use of a scraper, a pull rod, a tilting plate, a waste discharge port, and a collection box. When the traction block drives the scraper to slide synchronously, the pull rod drives the tilting plate to rotate, allowing the scraper to simultaneously scrape off the burning impurities. With the waste discharge port open, the scraped impurities automatically fall into the collection box, improving the multifunctionality of the testing device for cable fire resistance testing.

[0023] 3. This invention utilizes the combined use of connecting hinges, sealing covers, bevel gear sets, threaded rods, lifting blocks, connecting side plates, and auxiliary fume hoods. When the top of the test chamber needs to be opened, the rotating opening motion of the sealing cover causes the bevel gear set to rotate, which in turn drives the lifting block to slide via the threaded rod. This, in turn, causes the connecting side plates to rise synchronously, allowing the auxiliary fume hoods to move to both sides of the top of the test chamber. This allows for the timely absorption and purification of the diffused hot air, preventing burns to nearby personnel from the diffused hot air. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall rear view structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the overall side view structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the gas branch pipe and gas nozzle position distribution structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the positional distribution of the connecting rod and the pulling rod of the present invention;

[0029] Figure 6 This is a schematic diagram of the positional distribution of the clamping block and the traction block of the present invention;

[0030] Figure 7 This is a schematic diagram of the connection structure between the pull rod and the flip plate of the present invention;

[0031] Figure 8 This is a schematic diagram of the connection structure between the lifting block and the connecting side plate of the present invention;

[0032] Figure 9This is a schematic diagram of the connection structure between the sealing cover and the main fume hood of the present invention;

[0033] Figure 10 For the present invention Figure 8 Enlarged structural diagram at point A in the diagram;

[0034] Figure 11 For the present invention Figure 9 A magnified structural diagram at point B in the diagram.

[0035] The labels in the attached diagram are:

[0036] 1. Support base; 2. Test chamber; 3. Observation window; 4. Gas delivery pipe; 5. Gas branch pipe; 6. Gas nozzle; 7. Limiting block; 8. Cable body; 9. Connecting hole; 10. Electric push rod; 11. Traction block; 12. Sliding rod; 13. Connecting block; 14. Scraper; 15. Fixed column; 16. Connecting rod; 17. Slide groove; 18. Pulling rod; 19. Waste discharge port; 20. Clamping block; 21. Tilting plate; 2 2. Motor; 23. Bevel gear set; 24. Rotating shaft; 25. Connecting hinge; 26. Sealing cover; 27. Connecting through hole; 28. Main fume hood; 29. ​​Smoke pipe; 30. First filter box; 31. Electrostatic dust removal box; 32. Exhaust pipe; 33. Threaded rod; 34. Lifting block; 35. Lifting groove; 36. Connecting side plate; 37. Secondary fume hood; 38. Second filter box; 39. Smoke delivery pipe; 40. Collection box. Detailed Implementation

[0037] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0038] Example 1:

[0039] Please see Figures 1 to 11This embodiment provides a fire resistance testing device for special cable processing, including a support base 1, a test chamber 2 at the top of the support base 1, a gas delivery pipe 4 on the outer wall of the test chamber 2, a gas branch pipe 5 extending into the interior of the test chamber 2 fixedly connected to the outer wall of the gas delivery pipe 4, a gas nozzle 6 fixedly connected to the outer wall of the gas branch pipe 5, a limiting block 7 fixedly connected to the outer wall of the support base 1, a cable body 8 penetrating the outer wall of the test chamber 2 inserted into the outer wall of the limiting block 7, connection holes 9 at both ends of the test chamber 2 and the connection points with the cable body 8, a traction block 11 slidably connected to the outer wall of the support base 1, and a clamping block 2 that fits against the outer wall of the cable body 8 slidably connected to the top of the traction block 11. 0. A sliding rod 12 is fixedly connected to the outer wall of the traction block 11 and slidably connected to the outer wall of the test chamber 2. One end of the sliding rod 12 is fixedly connected to a connecting block 13 that fits against the outer wall of the cable body 8. A scraper 14 that fits against the bottom of the inner cavity of the test chamber 2 is fixedly connected to the outer wall of the connecting block 13. An observation window 3 made of transparent material is provided on the outer wall of the test chamber 2. An electric push rod 10 fixedly connected to the outer wall of the support base 1 is provided on the outer wall of the traction block 11. The clamping block 20 slides relative to the top of the traction block 11 through a bidirectional screw. A fixing post 15 is fixedly connected to the outer wall of the connecting block 13. A connecting rod 16 is slidably connected to the outer wall of the fixing post 15. A pulling rod 18 is rotatably connected to one end of the connecting rod 16. One end of the moving rod 18 is rotatably connected to a flip plate 21 that is rotatably connected to the bottom of the support base 1. A groove 17 is provided at the connection point between the outer wall of the connecting rod 16 and the fixed column 15. A discharge port 19 is provided at the connection point between the bottom of the support base 1 and the flip plate 21. A collection box 40 located below the discharge port 19 is slidably connected to the bottom of the support base 1. Two sets of connecting rods 16 are provided, and their positions are symmetrical about the central axis of the connecting block 13. Two sets of bevel gear sets 23 are provided, and their rotation directions are the same. Through the coordinated use of the traction block 11, the clamping block 20, and the connecting block 13, the special cable, when inserted into the test chamber 2 for fire resistance testing, is... The clamping block 20 fixes the cable to the top of the traction block 11 and drives the traction block 11 to slide, performing a feeding combustion fire resistance test on the cable. This simulates the effect of the cable during the feeding and laying process, and allows for adjustment of the test operation at different positions of the cable, improving the accuracy of the cable fire resistance test data. Through the coordinated use of the scraper 14, the pull rod 18, the flip plate 21, the debris discharge port 19, and the collection box 40, when the traction block 11 drives the scraper 14 to slide synchronously, the pull rod 18 drives the flip plate 21 to rotate, so that the scraper 14 can simultaneously scrape off the burning debris. With the debris discharge port 19 open, the scraped debris automatically falls into the collection box 40, improving the multi-functionality of the test device for cable fire resistance testing.

[0040] like Figure 8-11As shown, a motor 22 is installed on the outer wall of the test chamber 2. A bevel gear set 23 is fixedly connected to the output end of the motor 22. A rotating shaft 24 is fixedly connected to the outer wall of the bevel gear set 23. A connecting hinge 25 is fixedly connected to the outer wall of the rotating shaft 24. A sealing cover 26, which is rotatably connected to the outer wall of the test chamber 2, is fixedly connected to the outer wall of the connecting hinge 25. A connecting through hole 27 is opened on the inner side wall of the sealing cover 26. A main fume hood 28 located on one side of the connecting through hole 27 is fixedly connected to the outer wall of the sealing cover 26. Connecting side plates 36 are provided on both sides of the sealing cover 26 on the side wall of the test chamber 2. A threaded rod 33, which is rotatably connected to the side wall of the test chamber 2, is fixedly connected to the outer wall of the bevel gear set 23. The outer wall of the threaded rod 33 is threadedly connected to the bottom of the connecting side plate 36. The lifting block 34 is fixedly connected to the main body. The connecting hole 9 is set on the descending path of the connecting side plate 36, and the connecting side plate 36 and the connecting hole 9 are set one-to-one. Through the cooperation of the connecting hinge 25, sealing cover 26, bevel gear set 23, threaded rod 33, lifting block 34, connecting side plate 36 and auxiliary fume hood 37, when the top of the test chamber 2 needs to be opened, the bevel gear set 23 is rotated by driving the flipping opening movement of the sealing cover 26. The threaded rod 33 drives the lifting block 34 to slide, and drives the connecting side plate 36 to rise synchronously. This causes the auxiliary fume hood 37 to move to both sides of the top of the test chamber 2, so as to timely absorb and purify the diffused hot air and prevent the hot air from spreading and causing burns to the surrounding personnel.

[0041] like Figure 2 , Figure 3 , Figure 8 and Figure 9 As shown, a smoke pipe 29 is fixedly connected to the outer wall of the main smoke hood 28. One end of the smoke pipe 29 is fixedly connected to a first filter box 30 via a connecting pump. An electrostatic dust collector 31 is fixedly connected to the outer wall of the first filter box 30 via a connecting pipe. An exhaust pipe 32 is fixedly connected to the outer wall of the electrostatic dust collector 31 via a connecting pump. The lifting block 34 and the test chamber 2 are slidably connected. A lifting groove 35 is provided at the connection between the side wall of the test chamber 2 and the lifting block 34. A connecting side plate 36 is fixedly connected to the top of the lifting block 34. A secondary smoke hood 37 is fixedly connected to the outer wall of the connecting side plate 36. A second filter box 38 is fixedly connected to the outer wall of the secondary smoke hood 37 via a connecting pipe. A smoke supply pipe 39, which is fixedly connected to the outer wall of the electrostatic dust collector 31, is fixedly connected to the outer wall of the second filter box 38 via a connecting pump.

[0042] Working principle:

[0043] like Figure 1-11As shown, when using this special cable fire resistance testing device, the cable to be tested is inserted into the connection hole 9 through the limiting block 7, and the cable passes through the connection block 13 and extends out from the connection hole 9 at the other end of the test chamber 2. The clamping block 20 is driven to clamp and fix the extended cable, thus preparing for the cable fire resistance test.

[0044] After the cable is fixed, the drive sealing cover 26 is flipped and closed, so that the connecting side plate 36 fits against the top of the cable, further limiting the cable. Gas is delivered to the gas branch pipe 5 through the gas delivery pipe 4, and the flame source is sprayed out through the gas nozzle 6. The flame source is sprayed at different positions around the cable simultaneously for fire resistance. At this time, the electric push rod 10 is opened, and the traction block 11 is driven to slide along the outer wall of the support base 1. Under the connection of the sliding rod 12, the connecting block 13 is driven to slide synchronously in the test chamber 2 to pull the cable. The cable slides in the test chamber 2 to perform the fire resistance test on the cable and to perform adjustment test operations on different positions of the cable laterally.

[0045] When the cable is fed into the traction block 11 for fire resistance testing, the synchronous sliding of the connecting block 13 drives the scraper 14 to move synchronously and drives the fixed column 15 to slide along the inner wall of the slide groove 17. When the fixed column 15 slides to the end of the slide groove 17, the force of the fixed column 15 sliding continuously acts on the connecting rod 16, causing the connecting rod 16 to slide synchronously. Under the rotational connection of the pulling rod 18, the flipping plate 21 is driven to flip along the bottom of the support seat 1, so that the discharge port 19 is exposed and the scraper 14 scrapes off the loose impurities that fall from the discharge port 19 into the collection box 40 for centralized collection and treatment, thereby improving the multifunctionality of the test chamber 2 for cable fire resistance testing.

[0046] When the sealing cover 26 needs to be opened after the cable fire resistance test, the auxiliary fume hood 37 is driven to move, and the motor 22, connected by the bevel gear set 23, drives the rotating shaft 24 to rotate. With the connection of the connecting hinge 25, the sealing cover 26 is driven to flip open. At the same time, the rotation of the bevel gear set 23, connected by the threaded rod 33, drives the lifting block 34 to slide along the inner wall of the lifting groove 35, and drives the connecting side plate 36 to rise. With the simultaneous movement of the main fume hood 28 and the auxiliary fume hood 37, the hot air diffused from different directions at the top of the test chamber 2 is quickly absorbed and purified to prevent the hot air from spreading rapidly and causing burns to the surrounding staff, thus reducing the safety of the test chamber 2 when it is opened.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A fire resistance testing device for processing of special cables, comprising a support base (1), characterized in that: The top of the support seat (1) is provided with a test bin (2), the outer wall of the test bin (2) is provided with a gas delivery pipe (4), the outer wall of the gas delivery pipe (4) is fixedly connected with a gas branch pipe (5) extending into the test bin (2), and the outer wall of the gas branch pipe (5) is fixedly connected with a gas nozzle (6); The outer wall of the support seat (1) is fixedly connected with a limiting block (7), the outer wall of the limiting block (7) is inserted with a cable main body (8) penetrating through the outer wall of the test bin (2), and the connecting parts of the two ends of the test bin (2) and the cable main body (8) are provided with connecting holes (9); The outer wall of the support seat (1) is slidably connected with a traction block (11), the top of the traction block (11) is slidably connected with a clamping block (20) fitted with the outer wall of the cable main body (8), the outer wall of the traction block (11) is fixedly connected with a sliding rod (12) slidably connected with the outer wall of the test bin (2), one end of the sliding rod (12) is fixedly connected with a connecting block (13) fitted with the outer wall of the cable main body (8), and the outer wall of the connecting block (13) is fixedly connected with a scraper (14) fitted with the bottom of the inner cavity of the test bin (2); The outer wall of the connecting block (13) is fixedly connected with a fixed column (15), the outer wall of the fixed column (15) is slidably connected with a connecting rod (16), one end of the connecting rod (16) is rotatably connected with a pulling rod (18), one end of the pulling rod (18) is rotatably connected with a turnover plate (21) rotatably connected with the bottom of the support seat (1); The outer wall of the test bin (2) is provided with a motor (22), the output end of the motor (22) is fixedly connected with a bevel gear set (23), the outer wall of the bevel gear set (23) is fixedly connected with a rotating shaft (24), the outer wall of the rotating shaft (24) is fixedly connected with a connecting hinge (25), the outer wall of the connecting hinge (25) is fixedly connected with a sealing cover (26) rotatably connected with the outer wall of the test bin (2), the inner side wall of the sealing cover (26) is provided with a connecting through hole (27), the outer wall of the sealing cover (26) is fixedly connected with a main smoke suction cover (28) located on one side of the connecting through hole (27), and the side wall of the test bin (2) is provided with connecting side plates (36) located on both sides of the sealing cover (26); The outer wall of the bevel gear set (23) is fixedly connected with a threaded rod (33) rotatably connected with the side wall of the test bin (2), and the outer wall of the threaded rod (33) is threadedly connected with a lifting block (34) fixedly connected with the bottom of the connecting side plate (36). The lifting block (34) is in sliding connection with the test bin (2), a lifting groove (35) is arranged at the connecting position of the sidewall of the test bin (2) and the lifting block (34), the top of the lifting block (34) is fixedly connected with a connecting side plate (36), the outer wall of the connecting side plate (36) is fixedly connected with a secondary smoke cover (37), the outer wall of the secondary smoke cover (37) is fixedly connected with a second filter box (38) through a connecting pipe, and the outer wall of the second filter box (38) is fixedly connected with a smoke feeding pipe (39) fixedly connected with the outer wall of the electrostatic dust removal box (31).

2. A fire resistance testing apparatus for processing special cables according to claim 1, characterized in that: The outer wall of the test bin (2) is provided with an observation window (3) made of transparent material, the outer wall of the support seat (1) is provided with an electric push rod (10) fixedly connected with the outer wall of the traction block (11), and the clamping block (20) slides on the top of the traction block (11) through a bidirectional screw rod.

3. A fire resistance testing apparatus for processing special cables according to claim 1, characterized in that: The connecting rod (16) is provided with a sliding groove (17) at the connecting position of the outer wall and the fixed column (15), and the bottom of the support seat (1) is provided with a discharging opening (19) at the connecting position of the support seat (1) and the turnover plate (21).

4. A fire resistance testing apparatus for processing special cables according to claim 3, characterized in that: The bottom of the support seat (1) is in sliding connection with a collecting box (40) located below the discharging opening (19), the connecting rod (16) is provided with two groups, and the positions of the two groups of connecting rods (16) are symmetrically distributed about the central axis of the connecting block (13).

5. A fire resistance testing apparatus for processing special cables according to claim 1, characterized in that: The outer wall of the main smoke cover (28) is fixedly connected with a smoke pipe (29), one end of the smoke pipe (29) is fixedly connected with a first filter box (30) through a connecting pump, the outer wall of the first filter box (30) is fixedly connected with an electrostatic dust removal box (31) through a connecting pipe, and the outer wall of the electrostatic dust removal box (31) is fixedly connected with an exhaust pipe (32) through a connecting pump.

6. A fire resistance testing apparatus for processing special cables according to claim 1, characterized in that: The connecting hole (9) is arranged on the descending path of the connecting side plate (36), and the connecting side plate (36) and the connecting hole (9) are one-to-one corresponding.

7. A fire resistance testing apparatus for processing special cables according to claim 1, characterized in that: The bevel gear set (23) is provided with two groups, and the rotating directions of the two groups of bevel gear sets (23) are the same.

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