Fireproof cable combustion test device and use method thereof

Abstract

The invention relates to the technical field of cable tests, and discloses a fireproof cable combustion test device and a use method thereof.The fireproof cable combustion test device comprises a mounting frame part with a cable combustion space, and is characterized by further comprising a ventilation box part arranged at the top of the mounting frame part and fixedly connected with the mounting frame part, and the ventilation box part is arranged at the top of the mounting frame part and fixedly connected with the mounting frame part; the ventilation box part is used for introducing gas into the mounting frame part to ensure normal combustion of the cable; and the gas detection part is arranged in the ventilation box part, the gas detection part is fixedly connected with the ventilation box part, and the gas detection part is a gas detection machine. When the obtuse-angle-shaped scraper rotates, particles attached to the bottom of the filter plate can be scraped, the scraped particles can fall onto the inner wall of the obtuse-angle-shaped scraper, and when the obtuse-angle-shaped scraper rotates, the particles are thrown to a collection area of the mushroom-shaped hollow column under the action of centrifugal force, so that blockage caused by more particles attached to the filter plate is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cable test equipment, and specifically relates to a combustion test device for fire-resistant cables and its usage method. Background Art

[0002] A fire-resistant cable refers to a cable that can maintain safe operation for a certain period of time under flame combustion conditions. Fire-resistant cables are widely used in places related to fire safety and fire rescue, such as high-rise buildings, subways, underground streets, large power stations, and important industrial and mining enterprises. For example, the power supply lines and control lines of emergency facilities such as fire-fighting equipment and emergency guide lights.

[0003] The combustion test of fire-resistant cables mainly detects and determines their burn resistance and whether they contain toxic gases. When detecting whether the cable combustion is toxic, the flue gas generated by the cable combustion needs to be introduced into the gas detector. Since the flue gas will contain combustion impurity particles, these impurity particles will accumulate at the gas detector inlet, which not only affects the normal discharge of the flue gas, but also the impurity particles may enter the interior of the detector sensor, covering the sensitive elements of the sensor, hindering the normal contact between the gas and the sensor, and making the response of the sensor to the toxic gas in the flue gas become slow or inaccurate. Summary of the Invention

[0004] The purpose of the present invention is to provide a combustion test device for fire-resistant cables and its usage method to solve the problem that the impurity particles in the flue gas will accumulate at the gas detector inlet, which not only affects the normal discharge of the flue gas, but also the impurity particles may enter the interior of the detector sensor, covering the sensitive elements of the sensor, hindering the normal contact between the gas and the sensor, and making the response of the sensor to the toxic gas in the flue gas become slow or inaccurate.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] The present invention is a combustion test device for fire-resistant cables, including a mounting frame part. The mounting frame part has a space for burning the cable, and further includes:

[0007] An air ventilation box part, which is arranged on the top of the mounting frame part and is fixedly connected to the mounting frame part. The air ventilation box part is used to introduce gas into the mounting frame part to ensure the normal combustion of the cable;

[0008] A gas detection part, which is arranged in the air ventilation box part and is fixedly connected to the air ventilation box part. The gas detection part is a gas detector and is used to detect the flue gas generated by the cable combustion;

[0009] Among them, the air ventilation box part and the gas detection part cooperate with each other to detect the flue gas generated during the cable combustion and confirm whether the flue gas is toxic.

[0010] Furthermore, two U-shaped mounting plates are fixedly installed on the front inner wall of the mounting frame part. Two limiting frames are fixedly installed on the two U-shaped mounting plates. A reciprocating screw rod is rotatably installed on the two U-shaped mounting plates. The top end of the reciprocating screw rod rotatably extends outside the mounting frame part. A driving motor is fixedly installed on the top inner wall of the ventilation box part. The output shaft of the driving motor is fixedly connected to the reciprocating screw rod. An internally threaded block is sleeved on the reciprocating screw rod. A movable block is arranged in front of the internally threaded block.

[0011] Furthermore, a movable rod is rotatably penetrated through the movable block. Both ends of the movable rod respectively extend into the two limiting frames and are respectively slidably connected to the two limiting frames. Both rods on the back of the movable block slidably extend into the internally threaded block. Two adaptive springs and a telescopic rod are fixedly installed on the front of the movable block. The front ends of the telescopic rod and the two adaptive springs are fixedly installed with a hollow frame. A scraper is hingedly installed on the front of the hollow frame. Two cleaning plates are fixedly installed on the front inner wall of the mounting frame part.

[0012] Furthermore, the ventilation box part includes:

[0013] A ventilation component, which is connected to the mounting frame part through a blower. The ventilation component is used to suck external air into the mounting frame part for the combustion test of the cable.

[0014] A flow guiding component, which is connected to the mounting frame part through a first flow guiding plate. The flow guiding component is used to slow down the air flow velocity blown into the mounting frame part.

[0015] Among them, through the cooperation of the ventilation component and the flow guiding component, the air flow velocity entering the mounting frame part can be slowed down, so that the flame can stably conduct the combustion test on the cable.

[0016] Furthermore, the ventilation component includes a blower fixedly installed on the top of the mounting frame part. The reciprocating screw rod rotatably penetrates through the blower and includes:

[0017] A ventilation sub-component, which includes an air inlet pipe and an air outlet pipe fixedly installed on the outer part of the blower. The end of the air inlet pipe extends outside the ventilation box part. The end of the air outlet pipe extends into the mounting frame part.

[0018] Furthermore, the flow guiding component includes a first flow guiding plate fixedly installed on the back inner wall of the mounting frame part and includes:

[0019] A flow guiding sub-component, which includes two second flow guiding plates fixedly installed on the back inner wall of the mounting frame part. A smoke sensor is fixedly installed on the top inner wall of the mounting frame part. Two placement racks and a flame spraying head are fixedly installed on the back inner wall of the mounting frame part. An observation window is hingedly installed on the front of the mounting frame part. A control panel is arranged on the front of the mounting frame part.

[0020] Furthermore, the gas detection part includes:

[0021] The transmission assembly is connected to the mounting frame part through a mushroom-shaped hollow column. The top of the mushroom-shaped hollow column extends into the ventilation box part. The transmission assembly is used to generate a rotational movement through the gas flow inside the mounting frame part;

[0022] The scraping assembly is connected to the gas detection part through a mushroom-shaped hollow column. The scraping assembly is used to scrape off the particles filtered from the flue gas;

[0023] Among them, the transmission assembly and the scraping assembly cooperate to scrape off the filtered particles and collect the impurity particles under the action of centrifugal force.

[0024] Furthermore, the transmission assembly includes a mushroom-shaped hollow column fixedly installed on the mounting frame part, including:

[0025] For the transmission assembly, a T-shaped hollow shaft is rotatably installed on the inner wall of the bottom of the mushroom-shaped hollow column. A number of transmission fan blades are fixedly installed on the outer wall of the T-shaped hollow shaft. A discharge port is opened on the outer wall of the mushroom-shaped hollow column. An annular threaded piece is threadedly connected to the outer wall of the mushroom-shaped hollow column.

[0026] Furthermore, the scraping assembly includes two obtuse-angle-shaped scraping plates fixedly installed on the T-shaped hollow shaft, including:

[0027] For the scraping assembly, a filter plate is slidably installed in the mushroom-shaped hollow column. A telescopic spring is fixedly installed on the inner wall of the top of the mushroom-shaped hollow column. The bottom end of the telescopic spring is fixedly connected to the filter plate. The tops of the two obtuse-angle-shaped scraping plates are both in contact with the filter plate. The gas detection part communicates with the mushroom-shaped hollow column. An exhaust pipe is fixedly installed on the back of the gas detection part. Activated carbon is installed in the exhaust pipe.

[0028] Furthermore, a method for a fire-resistant cable combustion test device is as follows:

[0029] S1: Oxygen supply and combustion: The reciprocating screw drives the fan to start and inhale the outside air through the air inlet pipe, and then discharges the air into the mounting frame part through the air outlet pipe. Since the inside of the mounting frame part is in a sealed state, the air discharged from the air outlet pipe will provide continuous flame combustion for the flame spray head;

[0030] S2: Cleaning of flue gas particles: When the flue gas passes through the filter plate, the filter plate filters the impurity particles in the flue gas to prevent the particles from entering the gas detection part and affecting the detection effect. The obtuse-angle-shaped scraping plates will scrape off the particles attached to the bottom of the filter plate when rotating. The scraped particles will fall onto the inner wall of the obtuse-angle-shaped scraping plates and be thrown into the collection area of the mushroom-shaped hollow column under the action of centrifugal force when the obtuse-angle-shaped scraping plates rotate, thus preventing the filter plate from being blocked due to too many attached particles;

[0031] S3: Test transparency: Under the limiting action of the limiting frame and the movable rod, when the scraper touches the observation window, the adaptive spring undergoes a compressive deformation at this time, enabling the scraper to closely adhere to the observation window and enhancing the force of the scraper to scrape off the particles on the observation window. When the scraper rises or falls and touches the cleaning plate, the cleaning plate will clean the particles remaining on the scraper to avoid the particles remaining on the scraper and preventing the particles on the scraper from adhering to the observation window during the next scraping of the observation window, which may affect the judgment of the fire resistance of the cable through physical properties.

[0032] The present invention has the following beneficial effects:

[0033] (1) For a fire-resistant cable combustion test device of the present invention, as gas is continuously input into the mounting frame part, the air pressure inside the mounting frame part will increase. The gas will enter the mushroom-shaped hollow column and drive several transmission fan blades to rotate. The transmission fan blades will drive the T-shaped hollow shaft to rotate, and the T-shaped hollow shaft drives two obtuse-shaped scrapers to rotate synchronously. The gas will flow into the gas detection part along the mushroom-shaped hollow column and the filter plate to detect whether the combustion flue gas is toxic. When the flue gas passes through the filter plate, the filter plate filters the impurity particles in the flue gas to avoid the particles entering the gas detection part and affecting the detection effect. When the obtuse-shaped scraper rotates, it will scrape off the particles adhering to the bottom of the filter plate. The scraped particles will fall onto the inner wall of the obtuse-shaped scraper and be thrown into the collection area of the mushroom-shaped hollow column under the action of centrifugal force when the obtuse-shaped scraper rotates, thereby avoiding blockage caused by a large number of particles adhering to the filter plate.

[0034] (2) For a fire-resistant cable combustion test device of the present invention, place the fire-resistant cable on the placement rack, then ignite the burner head to conduct a combustion test on the cable. Start the driving motor, and the driving motor drives the reciprocating screw to rotate. The reciprocating screw drives the fan to start and inhale the outside air through the air inlet pipe, and then discharge the air into the mounting frame part through the air outlet pipe. Since the mounting frame part is in a sealed state, the air discharged from the air outlet pipe will provide continuous flame combustion for the burner head. The air blown in from the air outlet pipe will contact the first deflector plate. Under the guiding action of the first deflector plate, the air will turn and blow onto the two second deflector plates. The second deflector plates will cause the air to turn again. Under the action of the two turns, the air flow velocity blown out from the air outlet pipe will slow down, thereby stabilizing the air flow inside the mounting frame part, avoiding the unstable air flow affecting the combustion state of the flame, resulting in errors in the cable combustion test, and the stable air flow can ensure that the concentration of the smoke generated by the cable is detected by the smoke sensor.

[0035] (3) In a combustion test device for a fire-resistant cable according to the present invention, when the reciprocating screw rotates, it drives the internally threaded block to move reciprocally. The internally threaded block drives the movable block to move synchronously, and the movable block drives the scraper in the hollow frame to reciprocally scrape the inner wall of the observation window, preventing particles in the flue gas from adhering to the inner wall of the observation window, which may cause the staff to be unable to observe and record the fire resistance of the cable in the mounting frame part and whether the flame burns sufficiently. Under the limiting action of the limiting frame and the movable rod, when the scraper touches the observation window, the adaptive spring undergoes compressive deformation at this time, enabling the scraper to closely adhere to the observation window and enhancing the force of the scraper to scrape the particles on the observation window. When the scraper moves up or down and touches the cleaning plate, the cleaning plate will clean the particles remaining on the scraper to prevent particles from remaining on the scraper and preventing the particles on the scraper from sticking to the observation window during the next scraping of the observation window, which may affect the judgment of the fire resistance of the cable through physical properties.

[0036] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 is the overall structural schematic diagram of the present invention;

[0039] Figure 2 is the right-side partial cross-sectional structural schematic diagram of the present invention;

[0040] Figure 3 For the present invention Figure 2 is the enlarged structural schematic diagram of A in the present invention;

[0041] Figure 4 is the front partial cross-sectional structural schematic diagram of the present invention;

[0042] Figure 5 For the present invention Figure 4 is the enlarged structural schematic diagram of B in the present invention;

[0043] Figure 6 is the front cross-sectional structural schematic diagram of the present invention;

[0044] Figure 7 For the present invention Figure 6 is the enlarged structural schematic diagram of C in the present invention;

[0045] Figure 8 is the back structural schematic diagram of the present invention;

[0046] Figure 9 Schematic diagram of the method steps of the present invention

[0047] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0048] In the figure: 1. Mounting frame part; 102. C-shaped mounting plate; 103. Limiting frame; 104. Reciprocating screw; 105. Driving motor; 106. Internal thread block; 107. Movable block; 108. Movable rod; 109. Adaptive spring; 110. Telescopic rod; 111. Hollow frame; 112. Scraper; 113. Cleaning plate; 2. Ventilation box part; 201. Fan; 202. Air inlet pipe; 203. Air outlet pipe; 204. Deflector one; 205. Deflector two; 206. Smoke sensor; 207. Placing rack; 208. Flame nozzle; 209. Observation window; 210. Control panel; 3. Gas detection part; 301. Mushroom-shaped hollow column; 302. T-shaped hollow shaft; 303. Driving fan blade; 304. Discharge port; 305. Annular thread piece; 306. Obtuse angle-shaped scraper; 307. Filter plate; 308. Telescopic spring; 309. Exhaust pipe; 310. Activated carbon plate. Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] Please refer to Figure 1 - Figure 9 As shown in the figure, the present invention is a fire-resistant cable combustion test device, including a mounting frame part 1. The mounting frame part 1 has a space for burning the cable, and further includes:

[0051] A ventilation box part 2, which is arranged on the top of the mounting frame part 1. The ventilation box part 2 is fixedly connected to the mounting frame part 1, and the ventilation box part 2 is used to introduce gas into the mounting frame part 1 to ensure the normal combustion of the cable;

[0052] A gas detection part 3, which is arranged in the ventilation box part 2. The gas detection part 3 is fixedly connected to the ventilation box part 2. The gas detection part 3 is a gas detector, and the gas detection part 3 is used to detect the flue gas generated by the combustion of the cable;

[0053] Among them, the ventilation box part 2 and the gas detection part 3 cooperate with each other to detect the flue gas generated during the combustion of the cable and confirm whether the flue gas is toxic.

[0054] Such as Figure 3 and Figure 4As shown in the figure, two U-shaped mounting plates 102 are fixedly installed on the front inner wall of the mounting frame part 1. Two limiting frames 103 are fixedly installed on the two U-shaped mounting plates 102. A reciprocating screw rod 104 is rotatably installed on the two U-shaped mounting plates 102. The top end of the reciprocating screw rod 104 rotatably extends outside the mounting frame part 1. A driving motor 105 is fixedly installed on the top inner wall of the ventilation box part 2. The output shaft of the driving motor 105 is fixedly connected to the reciprocating screw rod 104. An internally threaded block 106 is sleeved on the reciprocating screw rod 104. A movable block 107 is arranged in front of the internally threaded block 106.

[0055] When the reciprocating screw rod 104 rotates, it will drive the internally threaded block 106 to move reciprocally. The internally threaded block 106 will drive the movable block 107 to move synchronously. The movable block 107 drives the movable rod 108 to move. The movable rod 108 will move flexibly under the limiting action of the limiting frame 103.

[0056] As Figure 3 shown in the figure, a movable rod 108 is rotatably penetrated through the movable block 107. The two ends of the movable rod 108 respectively extend into the two limiting frames 103 and are respectively slidably connected to the two limiting frames 103. The two rods on the back of the movable block 107 both slidably extend into the internally threaded block 106. Two adapting springs 109 and telescopic rods 110 are fixedly installed on the front of the movable block 107. The front ends of the telescopic rods 110 and the two adapting springs 109 are fixedly installed with a hollow frame 111. A scraper 112 is hingedly installed on the front of the hollow frame 111. Two cleaning plates 113 are fixedly installed on the front inner wall of the mounting frame part 1.

[0057] The movable block 107 drives the scraper 112 in the hollow frame 111 to reciprocally scrape the inner wall of the observation window 209, preventing particles in the flue gas from adhering to the inner wall of the observation window 209, which may cause the staff to be unable to observe and record the burn resistance of the cables in the mounting frame part 1 and whether the flame burns sufficiently.

[0058] As Figure 4 shown in the figure, the ventilation box part 2 includes:

[0059] A ventilation component, which is connected to the mounting frame part 1 through a fan 201. The ventilation component is used to suck external air into the mounting frame part 1 for the combustion test of the cables;

[0060] A flow guiding component, which is connected to the mounting frame part 1 through a first flow guiding plate 204. The flow guiding component is used to slow down the air flow rate blown into the mounting frame part 1;

[0061] Among them, through the cooperation of the ventilation component and the flow guiding component, the air flow rate entering the mounting frame part 1 can be slowed down, enabling the flame to stably conduct the combustion test on the cables.

[0062] The cooperation of the ventilation component and the flow guide component stabilizes the air flow in the mounting frame part 1, avoiding the influence of unstable air flow on the combustion state of the flame, resulting in errors in the cable combustion test, and the stable air flow can ensure that the concentration of the cable is detected by the smoke sensor 206 when the cable generates smoke.

[0063] As Figure 4 shown, the ventilation component includes a fan 201 fixedly installed on the top of the mounting frame part 1, and a reciprocating screw 104 rotates through the fan 201, including:

[0064] The ventilation component, the ventilation component includes an air inlet pipe 202 and an air outlet pipe 203 fixedly installed on the outer surface of the fan 201, the end of the air inlet pipe 202 extends outside the ventilation box part 2, and the end of the air outlet pipe 203 extends into the mounting frame part 1.

[0065] The reciprocating screw 104 drives the fan 201 to start and inhales the outside air through the air inlet pipe 202, and then discharges the air into the mounting frame part 1 through the air outlet pipe 203. Since the mounting frame part 1 is in a sealed state, the air discharged from the air outlet pipe 203 will provide continuous flame combustion for the flame jet 208.

[0066] As Figure 1 and Figure 4 shown, the flow guide component includes a first flow guide plate 204 fixedly installed on the inner wall of the back surface of the mounting frame part 1, including:

[0067] The flow guide component, the flow guide component includes two second flow guide plates 205 fixedly installed on the inner wall of the back surface of the mounting frame part 1, a smoke sensor 206 is fixedly installed on the top inner wall of the mounting frame part 1, two placement frames 207 and a flame jet 208 are fixedly installed on the inner wall of the back surface of the mounting frame part 1, an observation window 209 is hingedly installed on the front surface of the mounting frame part 1, and a control panel 210 is arranged on the front surface of the mounting frame part 1.

[0068] The air blown in from the air outlet pipe 203 will contact the first flow guide plate 204. Under the guiding action of the first flow guide plate 204, the air will turn and blow onto the two second flow guide plates 205. The second flow guide plates 205 will make the air turn again. Under the action of the two turns, the air flow velocity blown out from the air outlet pipe 203 will slow down, so as to stabilize the air flow in the mounting frame part 1.

[0069] As Figure 7 shown, the gas detection part 3 includes:

[0070] The transmission component, the transmission component is connected to the mounting frame part 1 through a mushroom-shaped hollow column 301, the top of the mushroom-shaped hollow column 301 extends into the ventilation box part 2, and the transmission component is used to generate a rotational action through the gas flow in the mounting frame part 1;

[0071] Scraping component, the scraping component is connected to the gas detection unit 3 through the mushroom-shaped hollow column 301, and the scraping component is used to scrape off the particles filtered from the flue gas;

[0072] Among them, the transmission component and the scraping component cooperate to scrape off the filtered particles and collect the impurity particles under the action of centrifugal force.

[0073] By the cooperation of the transmission component and the scraping component, particles can be filtered, enabling the gas detection unit 3 to more accurately detect whether there is toxicity in the flue gas.

[0074] Such as Figure 5 and Figure 7 As shown, the transmission component includes a mushroom-shaped hollow column 301 fixedly installed on the mounting frame part 1, including:

[0075] Transmission component, a T-shaped hollow shaft 302 is rotatably installed on the inner wall of the bottom of the mushroom-shaped hollow column 301, several transmission fan blades 303 are fixedly installed on the outer wall of the T-shaped hollow shaft 302, a discharge port 304 is opened on the outer wall of the mushroom-shaped hollow column 301, and an annular threaded piece 305 is threadedly connected to the outer wall of the mushroom-shaped hollow column 301.

[0076] At the end of the test, when it is necessary to take out the impurity particles in the collection area, rotate the annular threaded piece 305 to remove it. When the gas passes through the mushroom-shaped hollow column 301, the impurity particles will be blown out through the discharge port 304.

[0077] Such as Figure 4 、 Figure 7 and Figure 8 As shown, the scraping component includes two obtuse-shaped scraping plates 306 fixedly installed on the T-shaped hollow shaft 302, including:

[0078] Scraping component, the scraping component includes a filter plate 307 slidably installed in the mushroom-shaped hollow column 301, a telescopic spring 308 is fixedly installed on the inner wall of the top of the mushroom-shaped hollow column 301, the bottom end of the telescopic spring 308 is fixedly connected to the filter plate 307, the tops of the two obtuse-shaped scraping plates 306 are in contact with the filter plate 307, the gas detection unit 3 is communicated with the mushroom-shaped hollow column 301, and an exhaust pipe 309 is fixedly installed on the back of the gas detection unit 3, and activated carbon 310 is installed in the exhaust pipe 309.

[0079] When the obtuse-shaped scraping plate 306 scrapes the particles on the filter plate 307, the telescopic spring 308 will always keep the obtuse-shaped scraping plate 306 in close contact with the filter plate 307 under the action of elastic force, enhancing the scraping force of the obtuse-shaped scraping plate 306. The flue gas after detection will be discharged from the exhaust pipe 309 behind the gas detection unit 3, and the telescopic spring 308 in the exhaust pipe 309 will adsorb the toxic gas in the flue gas to prevent the toxic gas from being discharged and affecting the health of the staff.

[0080] As Figure 1 - Figure 9 shown, a method for a combustion test device of a fireproof cable has the following method steps:

[0081] S1: Oxygen supply and combustion: Place the cable on the placement rack 207, then ignite the flame nozzle 208 to conduct a combustion test on the cable. Start the drive motor 105, and the drive motor 105 drives the reciprocating screw 104 to rotate. The reciprocating screw 104 drives the fan 201 to start and inhale the outside air through the air inlet pipe 202, and then discharge the air into the mounting frame part 1 through the air outlet pipe 203. Since the mounting frame part 1 is in a sealed state, the air discharged from the air outlet pipe 203 will provide continuous flame combustion for the flame nozzle 208 to ensure the stable progress of the combustion test;

[0082] S2: Cleaning of flue gas particles: As the gas is continuously input into the mounting frame part 1, the air pressure in the mounting frame part 1 increases, and the gas will enter the mushroom-shaped hollow column 301. The flue gas will enter the gas detection part 3 through the mushroom-shaped hollow column 301 and the filter plate 307 for detection. When the flue gas passes through the filter plate 307, the filter plate 307 filters the impurity particles in the flue gas to prevent the particles from entering the gas detection part 3 and affecting the detection effect. The obtuse-angle-shaped scraper 306 will scrape off the particles adhering to the bottom of the filter plate 307 when rotating. The scraped particles will fall on the inner wall of the obtuse-angle-shaped scraper 306 and be thrown into the collection area of the mushroom-shaped hollow column 301 under the action of centrifugal force when the obtuse-angle-shaped scraper 306 rotates, so as to prevent the filter plate 307 from being blocked due to too many adhering particles;

[0083] S3: Test transparency: When the reciprocating screw 104 rotates, it will drive the internal thread block 106 to move reciprocally. The internal thread block 106 will drive the movable block 107 to move synchronously. The movable block 107 will drive the scraper 112 in the hollow frame 111 to move. Since the movable block 107 will also drive the movable rod 108 to move, under the limiting action of the limiting frame 103 and the movable rod 108, when the scraper 112 touches the observation window 209, at this time, the adaptation spring 109 undergoes compressive deformation, so that the scraper 112 can closely adhere to the observation window 209 to enhance the force of the scraper 112 to scrape off the particles on the observation window 209. When the scraper 112 rises or falls and touches the cleaning plate 113, the cleaning plate 113 will clean the particles remaining on the scraper 112 to prevent the particles on the scraper from remaining, and prevent the particles on the scraper 112 from sticking to the observation window 209 when scraping the observation window 209 next time and affecting the judgment of the fire resistance of the cable through physical properties.

[0084] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A fireproof cable burning test device, comprising a mounting frame (1), wherein the mounting frame (1) has a space for burning cables, characterized in that: Further comprising: A ventilation box part (2), the ventilation box part (2) is arranged on the top of the mounting frame part (1), the ventilation box part (2) is fixedly connected with the mounting frame part (1), and the ventilation box part (2) is used for introducing gas into the mounting frame part (1) to ensure the normal combustion of the cable; A gas detection part (3), the gas detection part (3) is arranged in the ventilation box part (2), the gas detection part (3) is fixedly connected with the ventilation box part (2), the gas detection part (3) is a gas detector, and the gas detection part (3) is used for detecting the flue gas generated by the combustion of the cable; Wherein, the ventilation box part (2) and the gas detection part (3) cooperate with each other to detect the flue gas generated during the combustion of the cable and confirm whether the flue gas is toxic.

2. A fireproof cable combustion test device according to claim 1, characterized in that: Two U-shaped mounting plates (102) are fixedly mounted on the front inner wall of the mounting frame part (1), two limiting frames (103) are fixedly mounted on the two U-shaped mounting plates (102), a reciprocating screw rod (104) is rotatably mounted on the two U-shaped mounting plates (102), the top end of the reciprocating screw rod (104) rotatably extends outside the mounting frame part (1), a driving motor (105) is fixedly mounted on the top inner wall of the ventilation box part (2), the output shaft of the driving motor (105) is fixedly connected with the reciprocating screw rod (104), an internally threaded block (106) is sleeved on the reciprocating screw rod (104), and a movable block (107) is arranged in front of the internally threaded block (106).

3. A fireproof cable combustion test device according to claim 2, characterized in that: A movable rod (108) is rotatably penetrated through the movable block (107), two ends of the movable rod (108) respectively extend into the two limiting frames (103) and are respectively slidably connected with the two limiting frames (103), two rods on the back of the movable block (107) both slidably extend into the internally threaded block (106), two adaptor springs (109) and a telescopic rod (110) are fixedly mounted on the front of the movable block (107), a hollow frame (111) is fixedly mounted at the front ends of the telescopic rod (110) and the two adaptor springs (109), a scraper (112) is hingedly mounted on the front of the hollow frame (111), and two cleaning plates (113) are fixedly mounted on the front inner wall of the mounting frame part (1).

4. A fireproof cable combustion test device according to claim 3, characterized in that: The ventilation box part (2) includes: A ventilation component, the ventilation component is connected with the mounting frame part (1) through a fan (201), and the ventilation component is used for sucking external air into the mounting frame part (1) for the combustion test of the cable; A flow guiding component, the flow guiding component is connected with the mounting frame part (1) through a first flow guiding plate (204), and the flow guiding component is used for slowing down the air flow rate blown into the mounting frame part (1); Wherein, through the cooperation of the ventilation component and the flow guiding component, the air flow rate entering the mounting frame part (1) can be slowed down, so that the flame can stably conduct the combustion test on the cable.

5. A fireproof cable combustion test device according to claim 4, characterized in that: The ventilation component includes a fan (201) fixedly mounted on the top of the mounting frame part (1), and the reciprocating screw rod (104) rotatably penetrates through the fan (201), including: A ventilation assembly, the ventilation assembly comprising an air inlet pipe (202) and an air outlet pipe (203) fixedly mounted on the outside of a fan (201), the end of the air inlet pipe (202) extending to the outside of the ventilation box portion (2), and the end of the air outlet pipe (203) extending to the inside of the mounting frame portion (1).

6. A fireproof cable combustion test device according to claim 5, characterized in that: The flow guide assembly comprises a flow guide plate 1 (204) fixedly mounted on the inner wall of the back side of the mounting frame portion (1), comprising: A flow guide assembly, the flow guide assembly comprising two flow guide plates (205) fixedly mounted on the inner wall at the back of a mounting frame (1), a smoke sensor (206) fixedly mounted on the top inner wall of the mounting frame (1), two placement racks (207) and a flame head (208) fixedly mounted on the inner wall at the back of the mounting frame (1), an observation window (209) hingedly mounted on the front of the mounting frame (1), and a control panel (210) provided on the front of the mounting frame (1).

7. A fireproof cable combustion test device according to claim 6, characterized in that: The gas detection unit (3) comprises: a transmission assembly, the transmission assembly being connected to the mounting frame portion (1) via a mushroom-shaped hollow column (301), the top of the mushroom-shaped hollow column (301) extending into the ventilation box portion (2), the transmission assembly being used to generate a rotational motion through the flow of gas in the mounting frame portion (1); A scraping component, the scraping component being connected to the gas detection unit (3) via a mushroom-shaped hollow column (301), and the scraping component being used to scrape particles filtered from the smoke; The transmission component cooperates with the scraping component to scrape off the filtered particles and collect the foreign particles under the action of centrifugal force.

8. A fireproof cable combustion test device according to claim 7, characterized in that: The transmission assembly comprises a mushroom-shaped hollow column (301) fixedly mounted on a mounting frame portion (1), comprising: A transmission assembly, wherein a T-shaped hollow shaft (302) is rotatably mounted on the inner wall of the bottom of the mushroom-shaped hollow column (301), a plurality of transmission fan blades (303) are fixedly mounted on the outer wall of the T-shaped hollow shaft (302), a discharge port (304) is provided on the outer wall of the mushroom-shaped hollow column (301), and an annular threaded blade (305) is threadedly connected to the outer wall of the mushroom-shaped hollow column (301).

9. A fireproof cable combustion test device according to claim 8, characterized in that: The scraping assembly comprises two obtuse-angle scrapers (306) fixedly mounted on a T-shaped hollow shaft (302), including: A scraping assembly, the scraping assembly comprising a filter plate (307) slidably mounted in a mushroom-shaped hollow column (301), a telescopic spring (308) fixedly mounted on the top inner wall of the mushroom-shaped hollow column (301), the bottom end of the telescopic spring (308) fixedly connected to the filter plate (307), the tops of the two blunt-angle scrapers (306) both in contact with the filter plate (307), the gas detection unit (3) communicating with the mushroom-shaped hollow column (301), an exhaust pipe (309) fixedly mounted on the back of the gas detection unit (3), and activated carbon (310) installed in the exhaust pipe (309).

10. A method for using a fireproof cable combustion test device, using the fireproof cable combustion test device as claimed in claim 9, characterized in that: The steps are as follows: S1: oxygen supply combustion: the reciprocating screw (104) drives the fan (201) to start and inhale the outside air through the air inlet pipe (202), and then discharges the air into the mounting frame (1) through the air outlet pipe (203). Since the mounting frame (1) is in a sealed state, the air discharged from the air outlet pipe (203) provides continuous flame combustion for the flame head (208); S2: Cleaning flue gas particles: When the flue gas passes through the filter plate (307), the filter plate (307) filters the impurity particles in the flue gas to prevent the particles from entering the gas detection unit (3) and affecting the detection effect. When the blunt-angle scraper (306) rotates, it scrapes off the particles attached to the bottom of the filter plate (307). The scraped particles fall onto the inner wall of the blunt-angle scraper (306). When the blunt-angle scraper (306) rotates, it is thrown to the collection area of ​​the mushroom-shaped hollow column (301) under the action of centrifugal force, thereby preventing the filter from being blocked due to a large number of particles attached to the filter plate (307); S3: Test transparency: Under the limiting action of the limiting frame (103) and the movable rod (108), when the scraper (112) contacts the observation window (209), the adaptive spring (109) is compressed and deformed, so that the scraper (112) can be close to the observation window (209) to enhance the force of the scraper (112) to scrape particles on the observation window (209). When the scraper (112) rises or falls to contact the cleaning plate (113), the cleaning plate (113) will clean the particles remaining on the scraper (112) to avoid particles remaining on the scraper, so as to prevent the particles on the scraper (112) from sticking to the observation window (209) when scraping the observation window (209) next time, affecting the judgment of the burning resistance of the cable by physical properties.

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