A fire resistant test device and test method for flexible fire resistant cable

Abstract

The present invention relates to the technical field of cable detection and testing equipment, and specifically to a flexible fire-resistant cable fire-resistant testing device and testing method. A loading platform is arranged in parallel above a main material platform. One end of the main material platform and the loading platform is inserted into a testing chamber for conveying a gasket plate. A glue discharge head is arranged in a row at the bottom of the end of the loading platform. A glue outlet is arranged at the bottom of the glue discharge head. When the gasket plate is conveyed through the bottom of the glue discharge head, a movable rod is driven to rotate so that the glue outlet is opened to discharge glue, and the glue is rolled by a glue scraping roller to apply glue to the gasket plate. The upper gasket plate is bonded to the lower gasket plate coated with glue. When the overlapped gasket plate is conveyed to a tape layer conveying mechanism, a bonded fire-resistant insulating layer is drawn by the tape layer conveying mechanism and conveyed to the fire-resistant chamber. The fire-resistant insulating layer is automatically wrapped around a cable core by a wrapping mechanism. A fire spraying test assembly hung in the fire-resistant chamber sprays fire toward the wrapped cable core for a fire test, thereby realizing a complete automated testing process with simple operation.

Description

Technical Field

[0001] The invention relates to the technical field of cable detection and testing equipment, and in particular to a fire resistance testing device and a testing method for a flexible fire-resistant cable. Background Art

[0002] Flexible fire-resistant cable, also known as inorganic mineral insulated cable, has good bending properties and is fire-resistant and flame-retardant. Its fire-resistant properties are mainly determined by the fire-resistant insulation layer and the sheath wrapped around the cable core. Existing fire resistance performance detection tests for cables, such as Chinese patent application CN202122557848.2 discloses a wire and cable fire resistance test device, comprising a combustion chamber, a fire-resistant cable to be tested is suspended inside the combustion chamber, and a combustion assembly is provided at the bottom of the fire-resistant cable to be tested for testing its fire resistance performance; a ventilation duct is provided on the top of the combustion chamber to facilitate ventilation and exchange of the combustion chamber Gas; a fire extinguishing facility is embedded in the inner wall at the top of the combustion chamber, and the fire extinguishing facility is used to quickly cool down the combustion chamber after the test is completed or to quickly extinguish the flame when a danger occurs. However, in the actual cable fire resistance test stage, R&D personnel usually need to select conventional and modified fire-resistant insulation layers or fire-resistant insulation layers in different combinations for test comparison. In order to fit the actual cable fire resistance characteristics, the modified fire-resistant insulation layers or fire-resistant insulation layers in different combinations need to be bonded with an adhesive and wrapped around the outside of the cable core to prepare a sample, and then a fire resistance test is carried out. As a result, the test process is complicated to operate and is not enough to meet higher practical requirements. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a flexible fire-resistant cable fire resistance test device to solve the problem of complex operation during the cable fire resistance test process.

[0004] Based on the above purpose, the present invention provides a flexible fire-resistant cable fire resistance test device, including a test chamber, and also including:

[0005] A main material platform, a loading platform is arranged above the main material platform in parallel, one end of the main material platform and the loading platform is inserted into the test chamber, and is used to convey the padding plate, on which a fire-resistant insulation layer is adhered;

[0006] The glue discharging heads are arranged in a row at the bottom of the end of the loading platform, and the bottom of the glue discharging heads is provided with a glue outlet;

[0007] The movable rod has a top end rotatably connected to the glue discharging head, and a glue scraping roller is rotatably connected to the bottom end of the movable rod. When the padding plate passes under the glue discharging head, the movable rod is driven to rotate, so that the glue outlet is opened to discharge glue, and the glue scraping roller rotates to roll the padding plate to apply glue;

[0008] The fire-resistant chamber is arranged in the test chamber, the cable core is connected to the fire-resistant chamber, and a wrapping mechanism is arranged in the fire-resistant chamber;

[0009] The belt layer conveying mechanism is arranged between the conveying end of the main material platform and the fire-resistant bin. When the stacked padding plates are conveyed to the belt layer conveying mechanism, the bonded fire-resistant insulating layer is rolled up by the belt layer conveying mechanism and conveyed to the fire-resistant bin. The fire-resistant insulating layer is wrapped around the cable core by the wrapping mechanism.

[0010] The fire spray test assembly is hung in the fire-resistant chamber and is used for fire spray test on the wrapped cable core.

[0011] Preferably, one end of the loading platform that penetrates into the test chamber is connected to an inclined material platform, and the glue discharge heads are arranged at the bottom of the end of the inclined material platform.

[0012] Preferably, a torsion spring is provided at the rotation connection between the top end of the movable rod and the glue discharging head, which is used to drive the movable rod to rotate and reset. When the movable rod rotates and resets, the glue discharging port is covered and closed by the glue scraping roller.

[0013] The glue outlet is covered and closed by a glue scraping roller, so as to further automatically and tightly seal the glue outlet when the pad plate is moved away.

[0014] Preferably, a switch valve is provided on the glue outlet to control the on / off of the glue outlet, and an angular displacement sensor is provided on the glue outlet. When the pad plate drives the movable rod to rotate, the switch valve is triggered by the angular displacement sensor to open the glue outlet.

[0015] Preferably, a purge head is obliquely hung on the glue discharging head, and an angular displacement sensor is electrically connected to the purge head for triggering and controlling the purge head to synchronously purge toward the glue coating surface.

[0016] Preferably, a connecting rod is connected to the top of the movable rod, and a push rod is laterally connected to the top of the connecting rod. In the initial state, the push rod is located at the upper part of the inclined material platform, and is used to push the pad plate downward for transmission until the push rod rotates downward with the movable rod to move away from the inclined material platform.

[0017] Preferably, the belt layer conveying mechanism includes a plurality of groups of rollers symmetrically arranged up and down for conveying the refractory insulation layer that is rolled and bonded. An air duct is provided at the side end of the roller for blowing the refractory insulation layer upward to adhere to the roller.

[0018] Preferably, the wrapping mechanism includes a flexible roller rotatably connected to the fire-resistant compartment, and a winding frame telescopically connected to the fire-resistant compartment. The winding frame is designed to be an open circular ring wrapped around the outside of the cable core. The winding frame telescopically moves to one side of the cable core, and the cable core and the flexible roller rotate relative to each other. The fire-resistant insulation layer is limited by the winding frame and gradually wrapped around the cable core.

[0019] Preferably, a discharge port is provided at one side of the conveying end of the main material platform, and when all the superimposed and bonded refractory insulating layers are rolled up and moved away from the cushioning plate, the main material platform stops conveying, and the cushioning plate is tilted and discharged along one side of the discharge port.

[0020] The present invention also provides a fire resistance test method for a flexible fire resistant cable, comprising the following steps:

[0021] a: The fire-resistant insulation layer to be tested is respectively adhered to the padding plates. The fire-resistant insulation layer on one padding plate faces upwards and is placed on the main material table. The fire-resistant insulation layer on the other padding plate faces downwards and is placed on the loading table. The main material table and the loading table synchronously convey the padding plates. A glue discharge head is arranged in a row at the bottom of the end of the loading table. When the padding plate passes under the glue discharge head, the movable rod is driven to rotate so that the glue outlet is opened to discharge glue, and the glue scraping roller is rotated to roll the padding plate to apply glue. The resisting rod rotates downward with the movable rod to move away from the inclined material table, and then the upper padding plate is released for transmission and falling. The upper padding plate falls through the loading table to automatically bond with the glue-coated padding plate below;

[0022] b: When the stacked padding sheets are transferred to the reel, the air duct blows the fire-resistant insulation layer upwards to adhere to the reel, so as to roll up and transfer the bonded fire-resistant insulation layer;

[0023] c: The bonded fire-resistant insulation layer is transferred to the fire-resistant chamber and moved to one side of the cable core through the expansion and contraction of the winding frame. The cable core and the flexible roller rotate relative to each other. The fire-resistant insulation layer is limited by the winding frame and gradually wrapped around the cable core.

[0024] d: The winding frame is telescopically moved away from the cable core, and the flame test assembly sprays flames toward the cable core to conduct a fire resistance test. The cable core or the flexible roller moves laterally along its axial direction to automatically detach the tested fire-resistant insulation layer, and then conduct subsequent continuous automatic feeding tests.

[0025] The beneficial effects of the present invention are as follows: a loading platform is arranged parallel to the main material platform, one end of the main material platform and the loading platform is inserted into the test chamber for conveying the padding plate, a glue discharge head is arranged in a row at the bottom of the end of the loading platform, a glue discharge port is arranged at the bottom of the glue discharge head, the top of the movable rod is rotatably connected to the glue discharge head, and the bottom of the movable rod is rotatably connected to a glue scraper roller, so that when the padding plate is conveyed under the glue discharge head, the movable rod is driven to rotate to open the glue discharge port to discharge glue, and the glue scraper roller is rotated to roll the padding plate to apply glue, and the upper padding plate falls through the loading platform to automatically bond with the glue-coated padding plate below, and at the same time, a durable Fire bin, the cable core and the corresponding wrapping mechanism are connected in the fire-resistant bin, and a tape layer conveying mechanism is arranged between the conveying end of the main material platform and the fire-resistant bin. When the overlapped padding plates are conveyed to the tape layer conveying mechanism, the bonded fire-resistant insulating layer is rolled up by the tape layer conveying mechanism and conveyed to the fire-resistant bin. The fire-resistant insulating layer is automatically wrapped around the cable core through the wrapping mechanism, and the fire spraying test assembly hung in the fire-resistant bin is used to conduct a fire spraying test on the wrapped cable core, thereby realizing a complete automated test process with simple operation and stable quality of bonding and wrapping, and avoiding the defects caused by manual bonding and wrapping that interfere with the results of the cable fire resistance test. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure when the gasket board of the present invention is adhered with a fire-resistant insulation layer;

[0029] Figure 3 For the present invention Figure 1 The enlarged schematic diagram of point A in the middle;

[0030] Figure 4 For the present invention Figure 1 The enlarged schematic diagram of point B in the middle;

[0031] Figure 5 It is a structural schematic diagram of the present invention when the cushioning plate is transferred to the bottom of the glue dispensing head;

[0032] Figure 6 It is a structural schematic diagram of the present invention when the movable rod is rotated to open the glue outlet to discharge glue;

[0033] Figure 7 It is a structural schematic diagram of the stacked padding plates of the present invention when being transferred to the belt layer transfer mechanism;

[0034] Figure 8 For the present invention Figure 7 The enlarged schematic diagram of the center C;

[0035] Fig. 9 It is a schematic diagram of the structure in which the fire-resistant insulation layer of the present invention is wrapped around the cable core;

[0036] Fig.10 For the present invention Fig. 9 The enlarged schematic diagram of point D in the middle;

[0037] Fig.11 It is a structural schematic diagram of the push rod of the present invention in the initial state;

[0038] Fig.12 It is a structural schematic diagram of the present invention when the support rod rotates downward along with the movable rod to move away from the inclined material platform;

[0039] Fig.13 It is a schematic diagram of the top view of the connecting rod and the supporting rod of the present invention;

[0040] Fig.14 It is a structural schematic diagram of the discharge port of the present invention;

[0041] Fig.15 It is a schematic structural diagram of the stacked and bonded fire-resistant insulation layer of the present invention when all of the layers are rolled out and removed from the padding board.

[0042] The markings in the figure are:

[0043] 1. Test chamber; 2. Main material platform; 3. Loading platform; 4. Pad plate; 41. Pasting part; 5. Fire-resistant insulation layer; 6. Glue dispensing head; 7. Glue dispensing port; 8. Movable rod; 9. Glue scraping roller; 10. Fire-resistant chamber; 11. Cable core; 12. Wrapping mechanism; 121. Flexible roller; 122. Wrapping rack; 13. Belt layer conveying mechanism; 131. Wrapping roller; 132. Air duct; 14. Flame test assembly; 15. Inclined material platform; 16. Purge head; 17. Connecting rod; 18. Abutment rod; 19. Dispensing port. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0045] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a fire-resistant test device for a flexible fire-resistant cable includes a test chamber 1 and a main material table 2. A loading table 3 is arranged parallel to the main material table 2. One end of the main material table 2 and the loading table 3 is inserted into the test chamber 1 for conveying a cushioning plate 4. A fire-resistant insulating layer 5 is adhered to the cushioning plate 4. A glue discharge head 6 is arranged in a row at the bottom of the end of the loading table 3. A glue discharge port 7 is arranged at the bottom of the glue discharge head 6. The top end of a movable rod 8 is rotatably connected to the glue discharge head 6. The bottom end of the movable rod 8 is rotatably connected to a glue scraping roller 9. When the cushioning plate 4 is conveyed through the bottom of the glue discharge head 6, the movable rod 8 is driven to rotate so that the glue discharge port 7 is opened to discharge glue, and the glue is discharged through the scraping roller. The rubber roller 9 rotates to roll the cushioning plate 4 to apply glue, a fire-resistant chamber 10 is provided in the test chamber 1, a cable core 11 is connected to the fire-resistant chamber 10, a wrapping mechanism 12 is provided in the fire-resistant chamber 10, and a belt layer conveying mechanism 13 is provided between the conveying end of the main material table 2 and the fire-resistant chamber 10. When the overlapped cushioning plate 4 is conveyed to the belt layer conveying mechanism 13, the bonded fire-resistant insulating layer 5 is rolled up by the belt layer conveying mechanism 13 and conveyed to the fire-resistant chamber 10, the fire-resistant insulating layer 5 is wrapped around the cable core 11 via the wrapping mechanism 12, and a fire spraying test assembly 14 is hung in the fire-resistant chamber 10 for fire spraying test toward the wrapped cable core 11.

[0047] The present invention sets a test chamber 1, and in particular, sets a main material platform 2, and sets a loading platform 3 above the main material platform 2 in parallel. One end of the main material platform 2 and the loading platform 3 is inserted into the test chamber 1 for conveying a padding plate 4. The padding plate 4 can be made of a high-temperature resistant hard plate such as a glass plate. One end of the padding plate 4 is provided with a pasting portion 41 for adhering a fire-resistant insulating layer 5. Based on the fact that synthetic mica tape, phlogopite tape, white mica tape, etc. are commonly used as fire-resistant insulating materials at present, among which synthetic mica tape has the best high-temperature insulating performance, the synthetic mica tape is made of mica paper copied from synthetic mica as the main material, and glass cloth is pasted on one side or both sides with an adhesive. The researchers have developed a method for preparing the fire-resistant insulating layer 5. During the actual cable fire resistance test stage, when the personnel select the modified mica paper, glass cloth or other new structural material layer combination test, the test fire-resistant insulating layer 5 is glued to the padding plate 4 respectively, and the fire-resistant insulating layer 5 on one padding plate 4 faces upward and is placed on the main material table 2, and the fire-resistant insulating layer 5 on the other padding plate 4 faces downward and is placed on the loading table 3. The main material table 2 and the loading table 3 can adopt a roller conveyor structure or a belt conveyor structure, etc., for synchronously conveying the padding plate 4, that is, synchronously conveying the padding plate 4 in parallel upper and lower spaces. A glue discharge head 6 is arranged in a row at the bottom end of the loading table 3, and a glue discharge port 7 is provided at the bottom end of the glue discharge head 6. The top end of the movable rod 8 is rotatably connected to the glue discharging head 6, and the bottom end of the movable rod 8 is rotatably connected to the scraper roller 9, so that when the padding plate 4 is transmitted through the bottom of the glue discharging head 6, the movable rod 8 is driven to rotate to open the glue outlet 7 to discharge glue, and the glue scraper roller 9 rotates to roll the padding plate 4 to apply glue, which is adapted to the different thicknesses of the padding plate 4 and the fire-resistant insulation layer 5, and the corresponding scraper roller 9 is abutted in real time to rotate, and the glue discharging of the adapted glue discharging head 6 is automatically controlled to achieve the effect of automatic adaptive accurate and comprehensive glue coating, which is not easy to produce deviation or waste, and has a high glue coating efficiency. The scraper roller 9 has the effect of uniformly scraping and leveling the glue, and the upper padding plate 4 falls through the loading platform 3 to meet the glue-coated padding plate 4 below Automatic plywood bonding, at the same time, a fire-resistant warehouse 10 is provided in the test warehouse 1, the outer wall of the fire-resistant warehouse 10 is made of fire-resistant heat-insulating material, a cable core 11 and a corresponding wrapping mechanism 12 are connected in the fire-resistant warehouse 10, a belt layer conveying mechanism 13 is provided between the conveying end of the main material platform 2 and the fire-resistant warehouse 10, when the stacked padding plate 4 is conveyed to the belt layer conveying mechanism 13, the bonded fire-resistant insulating layer 5 is drawn by the belt layer conveying mechanism 13 and conveyed to the fire-resistant warehouse 10, the fire-resistant insulating layer 5 is automatically wrapped around the cable core 11 through the wrapping mechanism 12, and is used for a fire spraying test toward the wrapped cable core 11 through a fire spraying test assembly 14 hung in the fire-resistant warehouse 10, the process is as follows Figure 1 , Figures 5 to 10 As shown, a complete automated test process is achieved with simple operation, stable bonding and wrapping quality, and defects caused by manual bonding and wrapping that may interfere with the results of the cable fire resistance test are avoided.

[0048] In an embodiment of the present invention, one end of the loading platform 3 that penetrates into the test chamber 1 is connected to a bevel platform 15, and the glue head 6 is arranged at the bottom of the end of the bevel platform 15. The upper padding plate 4 tilts down through the bevel platform 15 to automatically bond with the glue-coated padding plate 4 below.

[0049] In an embodiment of the present invention, a torsion spring is provided at the rotational connection between the top end of the movable rod 8 and the glue outlet head 6, which is used to drive the movable rod 8 to rotate and reset. When the movable rod 8 rotates and resets, the glue outlet 7 is covered and closed by the scraper roller 9, so as to facilitate further automatic sealing of the glue outlet 7 when the pad plate 4 is moved away.

[0050] In an embodiment of the present invention, a switch valve is provided on the glue discharging head 6 for controlling the on and off of the glue discharging port 7. An angular displacement sensor is provided on the glue discharging head 6 for sensing the angular displacement of the movable rod 8. When the padding plate 4 drives the movable rod 8 to rotate, the switch valve is triggered to open and discharge glue through the angular displacement sensor. Since the thickness of the padding plate 4 is fixed, it can be adjusted according to the different thicknesses of the refractory insulation layer 5. For example, if the thickness of the refractory insulation layer 5 is relatively thick, the rotation angle of the movable rod 8 is also relatively large. When a larger rotation angle is sensed by the angular displacement sensor, a correspondingly larger amount of glue is triggered to be discharged.

[0051] In an embodiment of the present invention, a purge head 16 is obliquely hung on the glue discharge head 6, and an angular displacement sensor is electrically connected to the purge head 16 for triggering and controlling the purge head 16 to synchronously purge toward the glue coating surface, so as to pre-purge and clean the glue coating area of ​​the pad plate 4.

[0052] In an embodiment of the present invention, Figures 11 to 13 As shown, a connecting rod 17 is connected to the top of the movable rod 8, and a resisting rod 18 is laterally connected to the top of the connecting rod 17. In the initial state, the resisting rod 18 is located on the upper part of the inclined material platform 15, and is used to resist the padding plate 4 for downward transmission, to prevent the padding plate 4 that is first transmitted on the inclined material platform 15 from being directly transmitted and falling, until the padding plate 4 on the main material platform 2 is transmitted and arrived, the resisting rod 18 rotates downward together with the movable rod 8 to move away from the inclined material platform 15, and then releases the padding plate 4 above for transmission and falling.

[0053] In an embodiment of the present invention, the belt layer conveying mechanism 13 includes a plurality of groups of rollers 131 symmetrically arranged up and down, which are used to convey the refractory insulation layer 5 that is rolled and bonded. An air duct 132 is provided at the side end of the roller 131, which is used to blow the refractory insulation layer 5 upward to adhere to the roller 131, thereby facilitating the stable rolling and conveying of the refractory insulation layer 5.

[0054] In an embodiment of the present invention, the wrapping mechanism 12 includes a flexible roller 121 rotatably connected to the fire-resistant bin 10, and a wrapping frame 122 telescopically connected to the fire-resistant bin 10. The wrapping frame 122 is designed to be an open ring wrapped around the outside of the cable core 11. Specifically, the wrapping frame 122 and the inner wall of the fire-resistant bin 10 can be connected by telescopic components such as telescopic rods. The cable core 11 and the rear end of the flexible roller 121 can be connected by a driving component such as a rotating motor to drive the cable core 11 and the flexible roller 121 to rotate relative to each other. When winding is required, the wrapping frame 122 is telescopically moved to one side of the cable core 11, and the cable core 11 is moved to the other side of the cable core 11. 11 and the flexible roller 121 rotate relative to each other, and the fire-resistant insulating layer 5 is limited by the winding frame 122 and gradually wrapped around the cable core 11. When a fire resistance test is required, the winding frame 122 is telescopically moved away from the cable core 11, and the fire spray test component 14 can use the existing fire spray equipment to spray flames toward the cable core 11 to conduct a fire resistance performance test. Preferably, one end of the cable core 11 or the flexible roller 121 can be further connected to another telescopic component such as a telescopic rod, which is used to drive the cable core 11 or the flexible roller 121 to move horizontally along its axial direction, so as to automatically detach from the fire-resistant insulating layer 5 after the test, so as to facilitate subsequent connection tests.

[0055] Preferably, a spray head may be provided inside the wrapping rack 122 for water spray detection after flame spray detection.

[0056] In an embodiment of the present invention, Fig.14 , Fig.15 As shown, a discharge port 19 is provided on one side of the conveying end of the main material platform 2, and the conveying roller on one side of the discharge port 19 can be slightly tilted. When all the superimposed and bonded refractory insulating layers 5 are rolled up and moved away from the padding plate 4, the main material platform 2 stops conveying, and the padding plate 4 loses the power to convey forward and the traction force of the refractory insulating layer 5, and naturally slides down along the inclined conveying roller toward the discharge port 19 to discharge the material, so as to automatically take out the empty padding plate 4 and carry out subsequent test loading. During the whole test process, the operation is convenient and the dangerous hidden dangers of high temperature or flame caused by excessive manual participation can be avoided.

[0057] The present invention also provides a fire resistance test method for a flexible fire resistant cable, comprising the following steps:

[0058] a: The fire-resistant insulating layer 5 to be tested is respectively adhered to the padding plate 4, wherein the fire-resistant insulating layer 5 on one padding plate 4 faces upwards and is placed on the main material platform 2, and the fire-resistant insulating layer 5 on the other padding plate 4 faces downwards and is placed on the loading platform 3. The main material platform 2 and the loading platform 3 synchronously convey the padding plate 4, and a glue discharge head 6 is arranged in a row at the bottom of the end of the loading platform 3. When the padding plate 4 is conveyed through the bottom of the glue discharge head 6, the movable rod 8 is driven to rotate so that the glue outlet 7 is opened to discharge glue, and the glue scraping roller 9 is rotated to roll the padding plate 4 to apply glue, and the push rod 18 rotates downward together with the movable rod 8 to move away from the inclined material platform 15, and then the upper padding plate 4 is released to be conveyed and dropped, and the upper padding plate 4 falls through the loading platform 3 to be automatically bonded with the glue-coated padding plate 4 below;

[0059] b: When the stacked padding sheet 4 is transferred to the reel 131, the air duct 132 blows the fire-resistant insulating layer 5 upward to adhere to the reel 131, so as to roll up and transfer the bonded fire-resistant insulating layer 5;

[0060] c: The bonded fire-resistant insulating layer 5 is transferred into the fire-resistant chamber 10, and is moved to one side of the cable core 11 through the winding frame 122, and the cable core 11 and the flexible roller 121 are relatively pressed and rotated, and the fire-resistant insulating layer 5 is limited by the winding frame 122 and gradually wrapped around the cable core 11;

[0061] d: The winding frame 122 is telescopically moved away from the cable core 11, and the flame test assembly 14 sprays flame toward the cable core 11 to perform a fire resistance test. The cable core 11 or the flexible roller 121 moves laterally along its axial direction to automatically detach from the tested fire-resistant insulation layer 5, and then perform a subsequent continuous automatic feeding test.

[0062] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0063] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flexible fire-resistant cable fire-resistant test device, comprising a test chamber (1), characterized in that: Also includes: A main material platform (2), a loading platform (3) is arranged above the main material platform (2) in parallel, one end of the main material platform (2) and the loading platform (3) is inserted into the test chamber (1) for conveying a cushioning plate (4), and a fire-resistant insulating layer (5) is adhered to the cushioning plate (4); The glue discharging heads (6) are arranged in a row at the bottom of the end of the loading platform (3), and the bottom of the glue discharging heads (6) is provided with a glue discharging port (7); A movable rod (8), the top end of which is rotatably connected to the glue discharging head (6), and the bottom end of which is rotatably connected to a glue scraping roller (9). When the padding plate (4) is transmitted through the bottom of the glue discharging head (6), the movable rod (8) is driven to rotate, so that the glue outlet (7) is opened to discharge glue, and the glue scraping roller (9) is rotated to roll and press the padding plate (4) to apply glue; A fire-resistant chamber (10) is arranged in the test chamber (1), a cable core (11) is connected to the fire-resistant chamber (10), and a wrapping mechanism (12) is arranged in the fire-resistant chamber (10); The belt layer conveying mechanism (13) is arranged between the conveying end of the main material platform (2) and the fire-resistant bin (10). When the stacked padding plates (4) are conveyed to the belt layer conveying mechanism (13), the bonded fire-resistant insulating layer (5) is rolled up by the belt layer conveying mechanism (13) and conveyed into the fire-resistant bin (10). The fire-resistant insulating layer (5) is wrapped around the cable core (11) by the wrapping mechanism (12); A fire spray test assembly (14) is hung in the fire-resistant chamber (10) and is used for spraying a fire test toward the wrapped cable core (11); One end of the loading platform (3) that penetrates into the test chamber (1) is connected to an inclined platform (15), and the glue discharge head (6) is arranged at the bottom of the end of the inclined platform (15); The glue discharging head (6) is provided with a switch valve for controlling the on and off of the glue discharging port (7); the glue discharging head (6) is provided with an angular displacement sensor; when the pad plate (4) drives the movable rod (8) to rotate, the switch valve is triggered by the angular displacement sensor to open and discharge glue; The belt layer conveying mechanism (13) comprises a plurality of groups of rollers (131) symmetrically arranged up and down, used for conveying the fire-resistant insulating layer (5) that is rolled and bonded, and a wind pipe (132) is provided at the side end of the roller (131) for blowing the fire-resistant insulating layer (5) upward to adhere to the roller (131); The wrapping mechanism (12) comprises a flexible roller (121) rotatably connected to the fire-resistant chamber (10), and a wrapping frame (122) telescopically connected to the fire-resistant chamber (10), wherein the wrapping frame (122) is designed to be an open ring wrapped around the outside of the cable core (11), and the wrapping frame (122) is telescopically moved to one side of the cable core (11), and the cable core (11) and the flexible roller (121) are relatively pressed and rotated, and the fire-resistant insulating layer (5) is limited by the wrapping frame (122) and gradually wrapped around the cable core (11).

2. A fire-resistant test device for a flexible fire-resistant cable according to claim 1, characterized in that: A torsion spring is provided at the rotational connection between the top end of the movable rod (8) and the glue outlet head (6), which is used to drive the movable rod (8) to rotate and reset. When the movable rod (8) rotates and resets, the glue outlet (7) is covered and closed by the glue scraping roller (9).

3. A fire-resistant test device for a flexible fire-resistant cable according to claim 1, characterized in that: A purge head (16) is obliquely hung on the glue dispensing head (6), and the angular displacement sensor is electrically connected to the purge head (16) and is used to trigger and control the purge head (16) to synchronously purge towards the glue coating surface.

4. A fire-resistant test device for a flexible fire-resistant cable according to claim 2, characterized in that: The top end of the movable rod (8) is connected to a connecting rod (17), and the top end of the connecting rod (17) is laterally connected to a support rod (18). In an initial state, the support rod (18) is located on the upper part of the inclined material platform (15) and is used to abut the padding plate (4) for downward transmission until the support rod (18) rotates downward together with the movable rod (8) to move away from the inclined material platform (15).

5. A flexible fire-resistant cable fire-resistant test device according to claim 1, characterized in that: A discharge port (19) is provided on one side of the conveying end of the main material platform (2). When all the superimposed and bonded fire-resistant insulating layers (5) are rolled up and removed from the cushioning plate (4), the main material platform (2) stops conveying, and the cushioning plate (4) is discharged along one side of the discharge port (19) at an angle.

6. A method for testing the fire resistance of a flexible fire-resistant cable, the method using the flexible fire-resistant cable fire resistance testing device as described in any one of claims 1 to 5 for testing, characterized in that: The following steps are involved: a: The fire-resistant insulating layer (5) to be tested is respectively glued to the padding plates (4), and the fire-resistant insulating layer (5) on one padding plate (4) is facing upwards and placed on the main material platform (2), and the fire-resistant insulating layer (5) on the other padding plate (4) is facing downwards and placed on the loading platform (3). The main material platform (2) and the loading platform (3) convey the padding plates (4) synchronously, and the bottom of the end of the loading platform (3) is arranged with glue heads (6). The padding plates (4) When the material is conveyed through the bottom of the glue discharge head (6), the movable rod (8) is driven to rotate, so that the glue discharge port (7) is opened to discharge glue, and the glue scraping roller (9) is rotated to roll the padding plate (4) to apply glue, and the push rod (18) rotates downward with the movable rod (8) to move away from the inclined material platform (15), and then releases the upper padding plate (4) to be conveyed and dropped, and the upper padding plate (4) falls through the loading platform (3) to automatically bond with the glue-coated padding plate (4) below; b: When the stacked padding sheet (4) is transferred to the reel (131), the air duct (132) blows the fire-resistant insulating layer (5) upward to adhere to the reel (131), so as to roll up and transfer the bonded fire-resistant insulating layer (5); c: The bonded fire-resistant insulating layer (5) is transferred into the fire-resistant chamber (10), and is moved to one side of the cable core (11) by the winding frame (122), and the cable core (11) and the flexible roller (121) are relatively pressed and rotated, and the fire-resistant insulating layer (5) is limited by the winding frame (122) and gradually wrapped around the cable core (11); d: The winding frame (122) is telescopically moved away from the cable core (11), and the flame test assembly (14) sprays flames toward the cable core (11) to perform a fire resistance test. The cable core (11) or the flexible roller (121) moves laterally along its axial direction to automatically detach the tested fire-resistant insulation layer (5), and then perform a subsequent continuous automatic feeding test.

Images