CN213689507U

CN213689507U - Cable flame-retardant testing device

Info

Publication number: CN213689507U
Application number: CN202022540535.1U
Authority: CN
Inventors: 程树华; 王俊艳; 谭志乐; 刘汉彦; 张嘉
Original assignee: Zhejiang Huajian Technology Development Co ltd
Current assignee: Zhejiang Huajian Technology Development Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-07-13
Anticipated expiration: 2030-11-05

Abstract

The utility model discloses a fire-retardant testing arrangement of cable aims at providing one kind and can handles the fire-retardant testing arrangement of cable of produced harmful gas of cable burning, and its technical scheme main points are including testing the box, and testing box top is provided with the fan, and the inside combustion chamber that is provided with of testing box, and the roof of combustion chamber is provided with the exhaust tube, the one end of exhaust tube is passed and is tested the box roof and link to each other with the fan, and the other end of exhaust tube is provided with the extraction opening, and the other water tank that is provided with of testing box, water tank top surface are provided with intake pipe, outlet duct, suction box, and the one end of intake pipe extends to and is close to water tank bottom surface department, and the other end of intake pipe links to each other with suction box, and suction box be provided with the breather pipe between suction box and the, The flame retardant property of safe test cable handles the harmful gas that the burning produced, the beneficial effect of pollution abatement.

Description

Cable flame-retardant testing device

Technical Field

The utility model relates to a cable flame retardant test field, in particular to cable flame retardant test device.

Background

The cable flame resistance test, that is, the characteristic that a test piece is burned under a prescribed test condition, the spread of flame on the test piece is only within a limited range after the flame source is removed and self-extinguishment is carried out, that is, the capability of preventing or delaying the occurrence or spread of flame, and the flame-retardant electric wire and cable generally adopt a method of adding halide containing halogen and metal oxide to a sheathing material, which is an excellent method from the viewpoint of flame retardancy, but, since these materials contain halide, a large amount of smoke and hydrogen halide gas are released upon combustion.

When the current cable flame-retardant testing device tests a cable, harmful gas generated by cable combustion is not directly discharged to the outside after being treated, and the problems of environmental pollution and damage to the body health of testing personnel exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fire-retardant testing arrangement of cable, it has the advantage that can handle the produced harmful gas of cable burning.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a fire-retardant testing arrangement of cable, is in including test box and setting control panel on the test box, its characterized in that: the testing box body is provided with a fan at the top, a combustion chamber is arranged in the testing box body, a mounting frame is arranged on the bottom wall of the combustion chamber, a flaming device and a temperature detection device are arranged at the top of the mounting frame, the input end of the fan is connected with an exhaust pipe, one end of the exhaust pipe far away from the fan penetrates through the top wall of the testing box body to enter the combustion chamber and is connected with an exhaust opening, one end of the exhaust opening far away from the exhaust pipe is provided with a dust filter screen, the output end of the fan is connected with a vent pipe, one end of the vent pipe far away from the fan is connected with a suction box, the suction box is connected with an air inlet pipe, one end of the air inlet pipe far away from the suction box is connected with a filter water tank, the suction box is used for absorbing water vapor in air and preventing gas from, the filter tank is connected with the outlet duct, the outlet duct is kept away from filter tank one end is connected with the purifying box, the purifying box is used for detaching remaining harmful gas, the purifying box is connected with the blast pipe.

The bottom of the side wall of the combustion chamber is horizontally provided with an air entraining pipe, one end of the air entraining pipe penetrates through the test box body and extends out of the test box body, the other end of the air entraining pipe is positioned in the combustion chamber and is provided with a baffle, the top of the baffle is hinged with the top of the air entraining pipe, and the baffle is attached to the orifice of the air entraining pipe;

the fan, the flaming device and the temperature detection device are electrically connected with the control panel.

By adopting the technical scheme, in the process of experiment, the temperature detection device is used for detecting the temperature of flame sprayed by the flame spraying device, so that a worker can more accurately know the temperature of the flame, harmful gas and smoke generated by cable combustion are upwards diffused under the influence of high temperature, the baffle plate attached to the pipe orifice of the air guide pipe on the air guide pipe is used for preventing the gas from flowing to the outside through the air guide pipe, the control panel controls the fan to work, the harmful gas enters the air suction pipe from the air suction port and is sent into the water suction box through the air pipe after passing through the fan, dust and impurities in the smoke are filtered by the filter screen, the dust and the impurities are prevented from entering the water suction box, the combustion state of the cable cannot be influenced by the work of the fan, because the combustion chamber is a closed space, the air in the combustion chamber is continuously discharged and the cable is combusted, the, at the moment, the baffle on the air guide pipe is not attached to the pipe orifice of the air guide pipe under the action of the internal and external pressure difference, and the outside air enters the combustion chamber through the air guide pipe, so that the air pressure is kept stable and the oxygen is continuously provided, meanwhile, the outside air is not led to flow to the cable through the drainage of the baffle, the influence on the experiment is reduced, when the cable stops burning, the air circulation in the combustion chamber is accelerated by the work of the fan, and the treatment efficiency of harmful gas is improved; harmful gas enters into the water tank by the intake pipe after passing through the suction box, because add in the water tank and have water, most harmful gas can react with water and absorb, and gas after the filtration enters into the purifying box through the outlet duct in, is purified by the purifying box and discharges, has reduced the pollution that produces external environment.

Further setting: the last articulated observation door that has of test box, the observation door is close to one side of combustion chamber is provided with magnet, magnet is followed the circumference of observation door sets up, works as the observation door is close to during the combustion chamber, magnet will with the combustion chamber is outer test box actuation.

Through adopting above-mentioned technical scheme, be provided with the observation door can be clearer observe the state of cable in the test, magnet and test box actuation on the observation door can guarantee simultaneously that the gas in the combustion chamber can not spill through the gap between observation door and the test box, have guaranteed the leakproofness of equipment.

Further setting: the heating device adopts a propane burner.

Through adopting above-mentioned technical scheme, the propane combustor has the advantage that the burning is stable, environmental suitability is good, safe in utilization, has increased the reliable degree of equipment.

Further setting: the temperature detection device adopts a thermocouple.

By adopting the technical scheme, the thermocouple has the advantages of high measurement precision, large measurable temperature range, simple structure and stable use.

Further setting: the water suction box is characterized in that a one-way valve and a water suction filter cylinder are arranged inside the water suction box, an inner cavity of the water suction filter cylinder is communicated with the vent pipe, gas in the vent pipe flows to the air inlet pipe through the water suction filter cylinder, the one-way valve is installed on one side, close to the air inlet pipe, of the water suction box, and the one-way valve is used for limiting the flow direction of the gas, so that the gas in the filter water tank cannot enter the water suction box through the air inlet pipe.

By adopting the technical scheme, the main component of harmful gas is hydrogen halide gas, and the hydrogen halide gas reacts with water to generate 'hydrogen halide acid' which can corrode instruments and equipment, so that the one-way valve is arranged in the water suction box to limit the gas flow direction, so that the gas containing 'hydrogen halide acid' cannot enter the combustion chamber through the vent pipe, and a small amount of water vapor passing through the one-way valve is filtered and absorbed by the water suction filter cylinder to play a role in double protection.

Further setting: three layers of activated carbon filter screens are arranged in the purification box along the height direction.

Through adopting above-mentioned technical scheme, the harmful gas that passes through filter tank in a small amount is further absorbed to the active carbon filter screen, has improved filtration efficiency.

Further setting: the cable clamp is arranged in the combustion chamber and used for clamping a test cable, and comprises a rectangular frame, a screw rod and a sliding plate, wherein the sliding plate is slidably mounted in the rectangular frame, the sliding plate divides the rectangular frame into a front half part and a rear half part, the screw rod is in threaded connection with the rectangular frame, one end of the screw rod extends into the rear half part and is abutted against the sliding plate, the other end of the screw rod extends out of the rectangular frame and is connected with a rotating block, an extension spring is sleeved on the screw rod, two ends of the extension spring are respectively fixedly connected with the sliding plate and the rectangular frame, and the front half part is used for inserting the test cable.

Through adopting above-mentioned technical scheme, before the experiment begins, in the rectangular frame to cable insertion cable anchor clamps, drive the screw rod through rotatory piece and rotate, thereby promote the sliding plate and slide and sticis on the cable in rectangular frame, extension spring is in tensile state this moment, after the experiment, drive the screw rod when rotatory piece and rotate so that screw rod and sliding plate no longer offset, extension spring provides elasticity this moment and makes the sliding plate remove so that sliding plate and screw rod offset all the time towards the screw rod direction, can lift the test cable off, cable anchor clamps make testing arrangement can match the cable of different diameters, the practicality of device has been improved.

Further setting: the combustor all is provided with the guide rail just to following the direction of height on the lateral wall of both sides, cable anchor clamps are located two between the guide rail, rectangular frame orientation the both sides of guide rail all are provided with connects the horizontal pole, connect the horizontal pole through adjust anchor clamps with guide rail sliding connection, adjust anchor clamps and include fixed block and adjusting bolt, the one end of fixed block with connect the horizontal pole and connect, the spout has been seted up to the other end, the guide rail inserts in the spout with spout sliding connection, set up threaded hole on the lateral wall of spout, threaded hole female connection has adjusting bolt, the fixed block with the guide rail passes through adjusting bolt fixed connection.

Through adopting above-mentioned technical scheme, before the experiment begins, slide adjusting through adjusting anchor clamps and guide rail makes cable anchor clamps remove suitable height, and the rethread adjusting bolt makes fixed block and guide rail fixed connection for the fixed altitude mixture control of cable makes testing arrangement can match the cable of different length, has improved the practicality of device.

Further setting: be provided with the locating lever on the lateral wall of combustion chamber, the locating lever is kept away from the one end of combustion chamber lateral wall is provided with the locating piece, the locating hole has been seted up on the locating piece, the axial of locating hole is vertical, sliding connection has the scale in the locating hole, the locating hole is used for right the scale carries on spacingly so that the scale keeps vertical, the scale keeps away from locating piece one end with it can dismantle to connect the horizontal pole and connect.

Through adopting above-mentioned technical scheme, the graduated scale is located by the cable, can make the more clear convenient fire-retardant ability of judgement cable of tester, and it is spacing to the graduated scale through the locating hole simultaneously for the graduated scale is in vertical state, has improved the accuracy of graduated scale, and the graduated scale can be dismantled with the connection horizontal pole and be connected, makes the graduated scale can more easily get to dismantle and change, has reduced staff's the operation degree of difficulty.

To sum up, the utility model discloses following beneficial effect has: the cable that can match different specifications tests, and the flame retardant property of test cable that can be high-efficient, safe handles the harmful gas that the burning produced, pollution abatement.

Drawings

FIG. 1 is a front view of the embodiment;

FIG. 2 is a front view of the embodiment with the viewing door open;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a top view of the clamping mechanism;

FIG. 5 is a side view of a graduated scale;

FIG. 6 is an enlarged view of portion B of FIG. 2;

FIG. 7 is a schematic view of the internal structure of the water tank;

FIG. 8 is a schematic view of the internal structure of the purification tank;

FIG. 9 is a schematic view of the internal structure of the suction box;

in the figure, 1, a test box body; 101. an observation door; 102. a magnet; 2. a control panel; 3. A combustion chamber; 31. a guide rail; 32. positioning a rod; 33. positioning blocks; 331. a graduated scale; 332. A pipe hoop; 34. a fixed block; 35. adjusting the bolt; 36. connecting the cross bars; 37. a rectangular frame; 371. a sliding plate; 372. an extension spring; 373. a screw; 38. rotating the block; 39. a mounting frame; 391. a flame projecting device; 392. a temperature detection device; 4. a fan; 5. an air exhaust pipe; 51. An air extraction opening; 52. a dust filter screen; 6. a breather pipe; 7. a suction box; 71. a water-absorbing cartridge filter; 72. a one-way valve; 8. an air inlet pipe; 9. a filtering water tank; 10. an air outlet pipe; 11. a purification box; 111. an active carbon filter screen; 12. an exhaust pipe; 13. a bleed pipe; 131. and a baffle plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

a cable flame-retardant testing device is disclosed, as shown in fig. 1, fig. 2, fig. 3, fig. 7 and fig. 8, and comprises a testing box body 1 and a control panel 2 arranged on the testing box body 1, a blower 4 is fixedly arranged on the top of the testing box body 1, the blower 4 is electrically connected with the control panel 2, a combustion chamber 3 is arranged in the testing box body 1, a mounting frame 39 is fixedly bolted on the bottom wall of the combustion chamber 3, a flame projecting device 391 and a temperature detecting device 392 are fixedly connected with the top of the mounting frame 39 through bolts, a propane burner is adopted as a heating device, a thermocouple is adopted as a temperature detecting device 392, the flame projecting device 391 and the temperature detecting device 392 are both electrically connected with the control panel 2, the temperature detecting device 392 is positioned on one side of the flame projecting device 391, the temperature detecting device 392 is used for detecting the temperature of flame projected by the flame projecting device, the air exhaust pipe 5 penetrates through the top wall of the test box body 1 and is connected with the input end of the fan 4, one end of the air exhaust pipe 5 in the combustion chamber 3 is provided with an air exhaust opening 51, the surface of the air exhaust opening 51 is fixedly connected with a dust filter screen 52, a filter water tank 9 is arranged beside the test box body 1, the top surface of the filter water tank 9 is provided with an air inlet pipe 8, an air outlet pipe 10 and a water suction box 7, one end of the air inlet pipe 8 is connected with the output end of the water suction box 7, the other end of the air inlet pipe is inserted into the filter water tank 9 and is close to the bottom surface of the filter water tank 9, a vent pipe 6 is connected between the input end of the water suction box 7 and the output end of the fan 4, one end;

as shown in fig. 2 and 6, a bleed air pipe 13 is horizontally arranged at the bottom of the side wall of the combustion chamber 3, one end of the bleed air pipe 13 passes through the test box 1 and extends to the outside of the test box 1, the other end of the bleed air pipe 13 is located in the combustion chamber 3 and is provided with a baffle 131, the top of the baffle 131 is hinged with the top of the bleed air pipe 13, and the baffle 131 is attached to the nozzle of the bleed air pipe 13;

as shown in fig. 1 and 2, the test box 1 is hinged with an observation door 101, a magnet 102 is disposed on a side of the observation door 101 close to the combustion chamber 3, the magnet 102 is disposed along a circumferential direction of the observation door 101, and when the observation door 101 is close to the combustion chamber 3, the magnet 102 will be attracted to the test box 1 outside the combustion chamber 3.

As shown in fig. 1 and 9, a check valve 72 and a water-absorbing filter cylinder 71 are arranged inside the water suction box 7, the water-absorbing filter cylinder 71 is installed on one side of the water suction box 7 close to the breather pipe 6, the check valve 72 is installed on one side of the water suction box 7 close to the air inlet pipe 8, and the check valve 72 is used for limiting the air flow direction, so that the air in the water filter box 9 can not enter the water suction box 7 through the air inlet pipe 8.

As shown in fig. 2 and 4, guide rails 31 are welded on the side walls of the two sides of the combustion chamber 3 along the height direction, a cable clamp is arranged between the two guide rails 31 and used for clamping test cables with different diameters, the cable clamp comprises a rectangular frame 37, a screw rod 373 and a sliding plate 371, the sliding plate 371 is slidably mounted in the rectangular frame 37, the screw rod 373 is in threaded connection with the rectangular frame 37, one end of the screw rod 373 extends into the rectangular frame 37 and abuts against the sliding plate 371, the other end of the screw rod 373 extends out of the rectangular frame 37 and is connected with a rotating block 38, an extension spring 372 is sleeved on the screw rod 373, and two ends of the extension spring 372 are respectively welded with the; rectangular frame 37 all is provided with connection horizontal pole 36 towards the both sides of guide rail 31, connects horizontal pole 36 through adjusting fixture and guide rail 31 sliding connection, adjusts the fixture and includes fixed block 34 and adjusting bolt 35, and the one end of fixed block 34 with be connected horizontal pole 36 welding, the spout has been seted up to the other end, guide rail 31 insert in the spout with spout sliding connection, adjusting bolt 35 threaded connection is in the one end of fixed block 34, and fixed block 34 passes through with guide rail 31 adjusting bolt 35 screws up and realizes fixed connection.

As shown in fig. 2 and 5, a positioning rod 32 is horizontally arranged at the bottom end of the guide rail 31, the positioning rod 32 is welded to the guide rail 31, the length direction of the positioning rod 32 is the same as the length direction of the connecting cross rod 36, a positioning block 33 is arranged at one end, away from the guide rail 31, of the positioning rod 32, a positioning hole is formed in the positioning block 33 in the vertical direction, the axial direction of the positioning hole is vertical, a graduated scale 331 is slidably connected to the positioning hole, the positioning hole is used for limiting the graduated scale 331 so that the graduated scale 331 can keep a vertical state, one end, away from the positioning block 33, of the graduated scale 331 is detachably connected with the connecting cross rod 36, a pipe hoop 332 is welded to the graduated scale 331, the pipe hoop 332 is sleeved on the connecting cross rod 36 and.

The working principle is as follows: before the experiment begins, the cable clamp is moved to a proper height by adjusting the sliding adjustment of the clamp and the guide rail 31, the fixed block 34 is fixedly connected with the guide rail 31 through the adjusting bolt 35, then the cable is inserted into the inner side of the rectangular frame 37 of the cable clamp, the screw rod 373 is driven to rotate by the rotating block 38, so that the sliding plate 371 is pushed to slide in the rectangular frame 37 and tightly press on the cable, at the moment, the tension spring 372 is in a tension state, when the screw rod 373 which is driven to rotate by the rotating block 38 is not abutted against the sliding plate 371 any more, the tension spring 372 provides elastic force to enable the sliding plate 371 to move towards the screw rod 373, so that the sliding plate and the screw rod 373 are always abutted against, the fixed height of the cable is adjusted by adjusting the clamp, so that the test device can be matched with test cables with different lengths, and the cable clamp enables the, after the cable is fixed, the observation door 101 is closed, the observation door 101 can observe the state of the cable in the test more clearly, meanwhile, the magnet 102 on the observation door 101 and the test box 1 are attracted to ensure that the gas in the combustion chamber 3 can not leak through the gap between the observation door 101 and the test box 1, so as to prevent the leakage of harmful gas in the experimental process, the flame spraying device 391 is started through the control panel 2, the temperature detection device 392 monitors the temperature of flame sprayed by the flame spraying device 391 in real time, so that the working personnel can more accurately know the temperature of the flame, in the experimental process, the harmful gas and smoke generated by cable combustion are upwards diffused under the influence of high temperature, the baffle 131 attached to the nozzle of the air guide pipe 13 on the air guide pipe 13 is used for preventing the gas from flowing to the outside through the air guide pipe 13, the control panel 2 controls the fan 4 to work, and the harmful gas enters the air exhaust pipe 5, after the smoke passes through the fan 4, the smoke is sent into the water suction box 7 through the vent pipe 6, dust and impurities in the smoke are filtered by the filter screen, the dust and the impurities are prevented from entering the water suction box 7, the combustion state of a cable cannot be influenced when the fan 4 works, because the combustion chamber 3 is a closed space, along with continuous discharge of air in the combustion chamber 3 and cable combustion, the air pressure in the combustion chamber 3 is continuously reduced and oxygen is continuously consumed, at the moment, the baffle 131 on the air guide pipe 13 is not attached to the pipe orifice of the air guide pipe 13 under the action of the internal and external pressure difference, external air enters the combustion chamber 3 through the air guide pipe 13, so that the air pressure is kept stable and oxygen is continuously provided, meanwhile, the external air cannot flow to the cable through the baffle 131, the influence on an experiment is reduced, when the cable stops burning, the control panel 2 controls the fan 4, the treatment efficiency of harmful gas is improved; harmful gas enters the filter water tank 9 through the air inlet pipe 8 after passing through the water suction box 7, most of the harmful gas can react with water and be absorbed because water is added in the filter water tank 9, the filtered gas enters the purifying box 11 through the air outlet pipe 10 and is purified and discharged by the purifying box 11, the pollution to the external environment is reduced, as the main component in the harmful gas is hydrogen halide gas, and the hydrogen halide gas reacts with the water to generate 'hydrohalic acid' which can corrode instruments and equipment, the check valve 72 is arranged in the water suction box 7 to limit the gas flow direction, so that the gas containing 'hydrohalic acid' can not enter the combustion chamber 3 through the vent pipe 6, a small amount of water vapor passing through the check valve 72 is filtered and absorbed by the water suction filter cylinder 71 to play a role of double protection, and the activated carbon filter screen 111 arranged in the purifying box 11 further absorbs a small amount of the harmful gas passing through the water, improved filtration efficiency, after the experiment, through being located the other scale 331 of cable, the testing personnel know more convenient fire-retardant ability of judgement cable, the spacing messenger scale 331 of locating hole pair scale 331 simultaneously is in vertical state, the accuracy of scale 331 has been improved, scale 331 with be connected horizontal pole 36 and be connected and make scale 331 can must dismantle more easily and change through ferrule 332, staff's the operation degree of difficulty has been reduced.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. The utility model provides a cable fire-retardant testing arrangement, includes test box (1) and sets up control panel (2) on the test box (1), its characterized in that: the testing device is characterized in that a fan (4) is arranged at the top of the testing box body (1), a combustion chamber (3) is arranged in the testing box body (1), a mounting frame (39) is arranged on the bottom wall of the combustion chamber (3), a flame spraying device (391) and a temperature detection device (392) are arranged at the top of the mounting frame (39), the input end of the fan (4) is connected with an air suction pipe (5), one end, far away from the fan (4), of the air suction pipe (5) penetrates through the top wall of the testing box body (1) to enter the combustion chamber (3) and is connected with an air suction opening (51), one end, far away from the air suction pipe (5), of the air suction opening (51) is provided with a dust filter screen (52), the output end of the fan (4) is connected with a vent pipe (6), one end, far away from the fan (4), of the vent pipe (6, one end, far away from the water suction box (7), of the air inlet pipe (8) is connected with a filtering water tank (9), the water suction box (7) is used for absorbing water vapor in air and preventing gas from flowing back into the combustion chamber (3) from the filtering water tank (9), the air inlet pipe (8) is inserted into the filtering water tank (9) and is close to the bottom surface of the filtering water tank (9), the filtering water tank (9) is connected with an air outlet pipe (10), one end, far away from the filtering water tank (9), of the air outlet pipe (10) is connected with a purifying box (11), the purifying box (11) is used for removing residual harmful gas, and the purifying box (11) is connected with an exhaust pipe (12);

the bottom of the side wall of the combustion chamber (3) is horizontally provided with an air-entraining pipe (13), one end of the air-entraining pipe (13) penetrates through the test box body (1) and extends out of the test box body (1), the other end of the air-entraining pipe (13) is positioned in the combustion chamber (3) and is provided with a baffle (131), the top of the baffle (131) is hinged with the top of the air-entraining pipe (13), and the baffle (131) is attached to the pipe orifice of the air-entraining pipe (13);

the fan (4), the flame spraying device (391) and the temperature detection device (392) are all electrically connected with the control panel (2).

2. The cable flame retardant test device of claim 1, wherein: it has observation door (101) to articulate on test box (1), observation door (101) are close to one side of combustion chamber (3) is provided with magnet (102), magnet (102) are followed the circumference setting of observation door (101), work as observation door (101) are close to when combustion chamber (3), magnet (102) will with combustion chamber (3) are outer test box (1) actuation.

3. The cable flame retardant test device of claim 1, wherein: the flame spraying device (391) adopts a propane burner.

4. The cable flame retardant test device of claim 1, wherein: the temperature detection device (392) adopts a thermocouple.

5. The cable flame retardant test device of claim 1, wherein: the utility model discloses a solar water heater, including suction box (7), suction box (7) inside is provided with check valve (72) and suction filter cartridge (71), the inner chamber of suction filter cartridge (71) with breather pipe (6) intercommunication, gaseous passing through in breather pipe (6) suction filter cartridge (71) flow direction intake pipe (8), check valve (72) are installed suction box (7) are close to intake pipe (8) one side, check valve (72) are used for restricting the gaseous flow direction, so that gaseous in rose water tank (9) can not pass through intake pipe (8) enter into in suction box (7).

6. The cable flame retardant test device of claim 1, wherein: three layers of activated carbon filter screens (111) are arranged in the purification box (11) along the height direction.

7. The cable flame retardant test device of claim 1, wherein: a cable clamp is arranged in the combustion chamber (3) and used for clamping a test cable, the cable clamp comprises a rectangular frame (37), a screw rod (373) and a sliding plate (371), the sliding plate (371) is slidably mounted in the rectangular frame (37), the sliding plate (371) divides the rectangular frame (37) into a front half part (3701) and a rear half part (3702), the screw rod (373) is in threaded connection with the rectangular frame (37), one end of the screw rod (373) extends into the rear half part (3702) and is abutted against the sliding plate (371), the other end of the screw rod (373) extends out of the rectangular frame (37) and is connected with a rotating block (38), an extension spring (372) is sleeved on the screw rod (373), two ends of the extension spring (372) are fixedly connected with the sliding plate (371) and the rectangular frame (37) respectively, and the front half part (3701) is used for inserting a test cable.

8. The cable fire retardant test device of claim 7, wherein: guide rails (31) are arranged on the side walls of the two sides opposite to the combustion chamber (3) along the height direction, the cable clamp is positioned between the two guide rails (31), the two sides of the rectangular frame (37) facing the guide rails (31) are respectively provided with a connecting cross rod (36), the connecting cross rod (36) is connected with the guide rail (31) in a sliding way through an adjusting clamp, the adjusting clamp comprises a fixing block (34) and an adjusting bolt (35), one end of the fixing block (34) is connected with the connecting cross rod (36), the other end of the fixing block is provided with a sliding groove, the guide rail (31) is inserted into the chute and is connected with the chute in a sliding way, a threaded hole is arranged on the side wall of the chute, the threaded hole is connected with an adjusting bolt (35) in an internal thread mode, and the fixing block (34) is fixedly connected with the guide rail (31) through the adjusting bolt (35).

9. The cable fire retardant test device of claim 8, wherein: be provided with locating lever (32) on the lateral wall of combustion chamber (3), locating lever (32) are kept away from the one end of combustion chamber (3) lateral wall is provided with locating piece (33), the locating hole has been seted up on locating piece (33), the axial of locating hole is vertical, sliding connection has scale (331) in the locating hole, the locating hole is used for right scale (331) carry on spacingly so that scale (331) keep vertical, scale (331) are kept away from locating piece (33) one end with connect horizontal pole (36) can dismantle the connection.