Performance test equipment for low-smoke halogen-free cable material

Abstract

The invention relates to the technical field of cable detection, and discloses a low-smoke halogen-free cable material performance test device, which comprises a fixing mechanism, a heating mechanism and a smoke exhaust mechanism, and is characterized in that the fixing mechanism comprises a protection shell and threading holes, and the threading holes are formed in the two sides of the inner side wall of the protection shell; the heating mechanism is detachably connected to the lower portion of the outer wall of the fixing mechanism and used for heating the cable. The smoke exhaust mechanism comprises a drainage cover, a check block, a combustion cavity and a smoke exhaust port. According to the performance test equipment for the low-smoke halogen-free cable material, through cooperative arrangement of the stop block and the combustion cavity, smoke can flow upwards into the combustion cavity when a cable is burnt by flame, the generated smoke is gathered by virtue of the shape of the combustion cavity, and a backflow effect is further generated, so that in continuous burning of the flame, the performance of the low-smoke halogen-free cable material is improved, and the performance of the low-smoke halogen-free cable material is improved. The backflow smoke can be ignited for the second time, the concentration of the smoke is further reduced, and the influence on the surrounding environment can be reduced when the smoke is discharged outwards.

Description

Technical Field

[0001] The invention relates to the technical field of cable detection, and in particular to a performance testing device for low-smoke halogen-free cable materials. Background Art

[0002] Cable refers to the conductor for transmitting electrical energy, which is mainly used for outdoor overhead and indoor bus and switch box. Cable needs to be tested for flame retardancy and fire resistance after production. Cable fire resistance test is a test to evaluate whether the cable can continue to operate under specified conditions when burning under specified fire source and time.

[0003] Low smoke halogen-free cable refers to a cable whose insulation layer material is halogen. When burned, it does not release halogen-containing gases and has a low smoke concentration. There are fire sources around the low smoke halogen-free cable. The high temperature of the flame will cause the insulation and sheath materials of the cable to burn. Even if these materials have the characteristics of low smoke and halogen-free, some smoke will still be produced during the combustion process. This is because during the combustion process, the chemical bonds in the materials will be destroyed, producing various gases and solid particles. These substances mix to form smoke. In the cable production process, it is often necessary to test the fire resistance of the cable. At present, when testing the fire resistance of the cable, it is necessary to burn the cable for a long time to test the fire resistance of the cable. However, when the flame is burned on the cable skin, smoke will still be generated due to material problems. In the test environment, especially the sealed environment, more smoke can easily affect the health of the staff. There is a lack of structure to deal with the smoke, so the smoke can only be discharged directly to the outside world. The smoke cannot be effectively treated and is directly discharged to the outside world to cause pollution. Summary of the invention

[0004] The purpose of the present invention is to provide a performance testing device for low-smoke halogen-free cable materials, which can perform secondary combustion on smoke generated during flame burning, thereby reducing the pollution caused by direct emission of smoke to the outside.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: Design a performance test equipment for low-smoke halogen-free cable materials, including a fixing mechanism, a heating mechanism and a smoke exhaust mechanism, wherein: The fixing mechanism comprises a protective shell and threading holes, wherein the threading holes are provided on both sides of the inner wall of the protective shell; The heating mechanism is detachably connected to the bottom of the protective shell and is used to burn the cable located in the protective shell; The smoke exhaust mechanism includes a drainage cover, a block, a combustion chamber and a smoke exhaust port. The drainage cover is detachably connected to the top of the protective shell, and an exhaust hole is provided on the top of the drainage cover. The block is fixedly connected to the inner wall of the drainage cover and covers the exhaust hole. The side surface of the block is at least partially spaced from the inner wall of the drainage cover so that the exhaust hole communicates with the interior of the protective shell, and a combustion chamber is provided at the bottom. The inner side wall of the combustion chamber is arranged in an arc shape, and a bulge is formed on the middle part of the inner bottom wall of the combustion chamber.

[0006] Optionally, the fixing mechanism also includes a fixing cylinder, a pressure rod and a guide groove. The multiple fixing cylinders are respectively fixedly installed on both sides of the outer wall of the protective shell and are located on the outside of the threading hole. The pressure rod is threaded through the top of the fixing cylinder, and the guide groove is opened below the outer wall of the protective shell to assist the sliding of the heating mechanism.

[0007] Optionally, the heating mechanism includes a fixed frame, a gas pipe, a nozzle and a guide block, the gas pipe is inserted into the end of the fixed frame, the nozzle is fixedly installed on the top of the fixed frame, the guide block is fixedly connected to both sides of the outer surface of the fixed frame, and the outer surface of the guide block is slidably connected to the inner wall of the guide groove.

[0008] Optionally, a blocking mechanism is also included, which includes a positioning block, a positioning rod, an adjustment block, a baffle and a slot, the two positioning blocks are respectively fixedly installed on both sides of the outer wall of the protective shell, the two positioning rods are respectively threadedly connected to the outer walls of the two positioning blocks, the adjustment block is rotatably connected between the two positioning blocks through the positioning rod, the baffle is fixedly connected to the outer wall of the adjustment block, and the two slots are respectively opened at the bottom of both sides of the baffle.

[0009] Optionally, a sealing mechanism is also included, which includes a ring, a hydraulic rod and a mounting hole, the ring is detachably connected to the top of the protective shell, the mounting hole is opened at the top of the protective shell, and the outer surface of the hydraulic rod is fixedly mounted to the inner bottom wall of the mounting hole.

[0010] Optionally, the cross-sections of the drainage cover and the block are both trapezoidal, and the smoke exhaust mechanism also includes a smoke exhaust port and a drainage groove. The smoke exhaust port is opened at the bottom of the block and is located outside the combustion chamber. The smoke exhaust port is used to place filter materials. The drainage groove is opened on the side of the block, one end of the drainage groove is located above the smoke exhaust port, and the other end of the drainage groove is located below the exhaust hole, so as to connect the smoke exhaust port with the exhaust hole.

[0011] Optionally, the smoke exhaust mechanism further includes an exhaust fan, and the exhaust fan is mounted on the top of the drainage cover above the exhaust hole by bolts.

[0012] Optionally, a supporting mechanism is provided at the bottom of the fixing mechanism, and the supporting mechanism includes a supporting seat, a socket and a fan. The supporting seat is fixedly installed at the bottom of the protective shell, the socket is opened below the outer wall of the supporting seat, and a plurality of fans are fixedly installed on the outer wall of the supporting seat above the socket.

[0013] Optionally, it also includes a collecting mechanism, which includes a limit block, a collecting box and a partition net, the outer surface of the limit block is slidably connected to the inner wall of the socket, the end of the collecting box is fixedly connected to the outer wall of the limit block, and the partition net is fixedly installed on the inner wall of the collecting box.

[0014] Optionally, the collecting mechanism further comprises at least two limiting bolts, the two limiting bolts are threadedly penetrated through the outer wall of the limiting block, and one end of the limiting bolt passing through the limiting block is threadedly connected to the outer wall of the support seat.

[0015] The present invention provides a performance testing device for low-smoke halogen-free cable materials, which has the following beneficial effects: The performance testing equipment for low-smoke halogen-free cable materials allows the low-smoke halogen-free cable to be tested to pass through the threading hole into the protective shell for testing. After the low-smoke halogen-free cable is in the protective shell, the heating mechanism is started, and the heating mechanism generates flames to perform fire resistance testing on the low-smoke halogen-free cable. During the burning process of the low-smoke halogen-free cable, the low-smoke halogen-free cable will generate a small amount of smoke due to combustion. The smoke flows upward into the combustion chamber opened by the block along with the airflow generated by the flame, and is not discharged through the exhaust hole on the drainage cover. The smoke flowing into the combustion chamber passes through the protrusions on the bottom wall of the combustion chamber to the combustion chamber. The inner wall of the combustion chamber is dispersed, and the arc-shaped inner wall of the combustion chamber buffers the smoke and produces a falling effect, so that the smoke re-enters the protective shell. During the continuous burning of the flame, the reflux smoke is ignited by the continuously burning flame and undergoes secondary ignition, which further reduces the concentration of the smoke and reduces the impact on the surrounding environment when it is discharged outward. Through the coordinated setting of the drainage cover and the smoke exhaust port, the smoke can be secondary burned and the exhaust gas can be discharged outward with the help of the smoke exhaust port, which minimizes the concentration of the smoke and improves the safety and environmental protection during detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall installation structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the support mechanism of the present invention; Figure 3 This is a schematic diagram of the installation structure of the heating mechanism of the present invention; Figure 4 This is a schematic diagram of the explosion structure of the fixing mechanism of the present invention; Figure 5 This is a schematic diagram of the explosion structure of the blocking mechanism of the present invention; Figure 6 This is a schematic diagram of the explosion structure of the sealing mechanism of the present invention; Figure 7 This is a schematic diagram of the exhaust fan installation structure of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the drainage cover of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the stopper of the present invention; Fig.10 It is a schematic diagram of the explosion structure of the collecting mechanism of the present invention.

[0017] In the figure: 1. fixing mechanism; 101. protective shell; 102. threading hole; 103. fixing cylinder; 104. pressure rod; 105. guide groove; 2. heating mechanism; 201. fixing frame; 202. gas pipe; 203. nozzle; 204. guide block; 3. blocking mechanism; 301. positioning block; 302. positioning rod; 303. adjusting block; 304. baffle; 305. slot; 4. sealing mechanism; 401. sleeve ring; 402, hydraulic rod; 403, mounting hole; 5, smoke exhaust mechanism; 501, drainage cover; 502, exhaust hole; 503, exhaust fan; 504, stopper; 505, combustion chamber; 506, smoke exhaust port; 507, drainage groove; 6, supporting mechanism; 601, supporting seat; 602, socket; 603, fan; 7, collecting mechanism; 701, limit block; 702, collecting box; 703, partition net; 704, limit bolt. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. All other embodiments obtained by ordinary technicians in the field without making creative work based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0019] See also Figures 1 to 10 The embodiment of the present invention provides a performance detection device, which is applied to the scene of fire performance detection during cable detection. In this embodiment, the structure of the detection mechanism is improved to reduce the smoke emission concentration and impact. Specifically, taking the fire performance detection of the cable as an example, as a preferred solution in this embodiment, the detection mechanism is specifically a performance testing device for low-smoke halogen-free cable materials, which can secondary ignite and guide the smoke generated when the cable is burned by flames.

[0020] See also Figures 1 to 10 The present invention provides a technical solution: a performance testing device for low-smoke halogen-free cable materials. The detection device is mainly used in the scenario of fire resistance performance detection during cable detection.

[0021] It includes a fixing mechanism 1, a heating mechanism 2 and a smoke exhaust mechanism 5, wherein: The fixing mechanism 1 includes a protective shell 101 and threading holes 102, and the threading holes 102 are opened on both sides of the inner wall of the protective shell 101; The heating mechanism 2 is detachably connected to the bottom of the protective shell 101 and is used to burn the cables in the protective shell 101; The smoke exhaust mechanism 5 includes a drainage cover 501, a block 504 and a combustion chamber 505. The drainage cover 501 is detachably connected to the top of the protective shell 101, and an exhaust hole 502 is provided at the top of the drainage cover 501. The block 504 is fixedly connected to the inner wall of the drainage cover 501 and covers the exhaust hole 502. The side surface of the block 504 is at least partially spaced from the inner wall of the drainage cover 501 so that the exhaust hole 502 communicates with the inside of the protective shell 101, and a combustion chamber 505 is provided at the bottom. The inner side wall of the combustion chamber 505 is arranged in an arc shape, and a protrusion is formed in the middle part of the inner bottom wall of the combustion chamber 505.

[0022] In this embodiment, the protective shell 101 and the threading hole 102 are arranged in coordination, so that the wire to be tested can be threaded and protected, so that the wire can be burned in the protective shell 101, and the flame can be blocked at the same time to prevent the flame from affecting the surrounding personnel. By setting the heating mechanism 2, the fire can be sprayed and heated under the wire to detect the fire resistance of the wire. At the same time, the heating mechanism 2 can be pulled out for inspection and maintenance. The smoke generated by the burning of the low-smoke halogen-free cable is mainly composed of some gases and tiny solid particles generated by pyrolysis. These fumes may contain carbon monoxide, carbon dioxide, and a small amount of Although the hydrogen halide is low-smoke and halogen-free, there may still be a very small amount and some hydrocarbons, etc. Among them, carbon monoxide is a flammable gas, which will burn when it reaches a certain mixing ratio with oxygen and encounters a fire source. Therefore, under the sealing of the protective shell 101, the carbon monoxide produced by the combustion of the low-smoke and halogen-free cable continues to accumulate. When the concentration reaches the explosion limit, the carbon monoxide will be ignited by the flame for the second time. If the smoke produced by the combustion of the low-smoke and halogen-free cable contains incompletely burned hydrocarbon particles, these particles will also undergo secondary combustion in an environment with a sufficiently high temperature. The smoke will gather in the protective shell 101, and under the influence of the high temperature of the flame, the smoke will accumulate in the protective shell 101. The smoke exhaust mechanism 5 can be used to seal the top of the protective shell 101 with the help of the drainage cover 501, and can also guide and transport the smoke. The setting of the block 504 can block the flame. The setting of the combustion chamber 505 can make the smoke reach the middle of the top of the combustion chamber 505 when the hot air drives the smoke to move upward, and the smoke inside the combustion chamber 505 will be diffused to the surrounding due to the driving of the hot air, and then the smoke will be guided and transported downward again with the help of the outer shape of the combustion chamber 505, so that the smoke can contact the flame again, and then The smoke is secondary ignited to further reduce the concentration of the smoke. When the low-smoke halogen-free cable is burned, there is often not much smoke, and the combustion chamber 505 can gather and guide the smoke for transportation. After the secondary combustion of less smoke, there will not be much smoke discharged outward, which can effectively reduce the impact on the surrounding experimental environment. Through the setting of the smoke exhaust port 506, the smoke can be guided and transported to be discharged outward, and the smaller smoke exhaust port 506 can slow down the speed of smoke discharge outward, thereby prolonging the time that the smoke exists inside the combustion chamber 505, so that the smoke can be fully secondary burned. Or it can be further understood that for smoke ignition, the smoke generated by the low-smoke halogen-free cable under inspection can be detected in a relatively closed space. As the smoke is ignited, the concentration of the smoke can be detected, and then the data of the smoke emission after ignition can be obtained; At the same time, by conducting a secondary combustion experiment on smoke, the safety of the low-smoke halogen-free cable under test in a relatively sealed space can be simulated and tested, that is, in a warehouse or electric control room, when the low-smoke halogen-free cable under test is burned by fire, whether there will be a deflagration when the smoke concentration reaches a certain level, and whether there will be an explosion further; By leaving the smoke in the combustion chamber 505, a smoke concentration detection sensor can be provided. The smoke concentration detection sensor, i.e., a laser smoke sensor, can detect the smoke concentration in the combustion chamber 505, and then analyze the rate and concentration of smoke released when the low-smoke halogen-free cable is burned by fire to analyze whether it meets the standards, and compare the smoke concentration consumption when the smoke is ignited with the rate of smoke released when the low-smoke halogen-free cable is burned by fire to analyze whether it meets the standards; When the smoke concentration reaches the safety threshold, check the combustion status of the smoke during secondary combustion. During the secondary combustion process, the repeated combustion of low-smoke halogen-free cables in a confined space can be simulated to assess whether there is a risk of re-ignition. This helps to understand whether the cable will cause a more serious fire due to the re-ignition of the fire in actual use, so as to facilitate the adoption of more effective preventive measures; At the same time, by extending the residence time of the smoke in the combustion chamber 505, the diffusion and emission behavior of the smoke can be observed, simulating the flow path and diffusion rate of the smoke under different experimental conditions, that is, different usage scenarios, and also in a relatively closed usage environment.

[0023] In the above embodiment, as a preferred scheme, the fixing mechanism 1 also includes a fixing cylinder 103, a pressure rod 104 and a guide groove 105. The multiple fixing cylinders 103 are respectively fixedly installed on both sides of the outer wall of the protective shell 101 and are located on the outside of the threading hole 102. The pressure rod 104 is threadedly penetrated through the top of the fixing cylinder 103. The guide groove 105 is opened below the outer wall of the protective shell 101, which is used to assist the sliding of the heating mechanism 2. Through the coordinated setting of the fixing cylinder 103 and the pressure rod 104, the cable can be compressed and fixed in position on the outside of the threading hole 102, thereby ensuring the stability of the cable during testing and reducing the shaking of the cable during testing. Through the setting of the guide groove 105, the heating mechanism 2 can be installed and guided, thereby facilitating the installation, disassembly and maintenance of the heating mechanism 2.

[0024] In the above embodiment, as a preferred solution, the heating mechanism 2 includes a fixing frame 201, a gas pipe 202, a nozzle 203 and a guide block 204. The gas pipe 202 is plugged into the end of the fixing frame 201, the nozzle 203 is fixedly installed on the top of the fixing frame 201, and the guide block 204 is fixedly connected to both sides of the outer surface of the fixing frame 201. The outer surface of the guide block 204 is slidably connected to the inner wall of the guide groove 105. Through the setting of the fixing frame 201, the gas pipe 202 and the nozzle 203 can be installed, and then the gas in the gas pipe 202 can be transported and guided, and then the nozzle 203 is supplied with gas, so that the nozzle 203 sprays flames, and then the cable is flame heated. The setting of the guide block 204 can cooperate with the guide groove 105, so as to facilitate the installation and guidance of the fixing frame 201, thereby improving the practicality of the device.

[0025] In the above embodiment, as a preferred solution, a blocking mechanism 3 is also included, and the blocking mechanism 3 includes a positioning block 301, a positioning rod 302, an adjustment block 303, a baffle 304 and a slot 305. The two positioning blocks 301 are respectively fixedly installed on both sides of the outer wall of the protective shell 101, and the two positioning rods 302 are respectively threadedly connected to the outer walls of the two positioning blocks 301. The adjustment block 303 is rotatably connected between the two positioning blocks 301 through the positioning rod 302, and the baffle 304 is fixedly connected to the outer wall of the adjustment block 303. The two slots 305 are respectively opened on the baffle 304. At the bottom of both sides, through the cooperation of the positioning block 301 and the positioning rod 302, the adjustment block 303 can be assisted to rotate and slide, thereby facilitating the rotation and sliding of the baffle 304, and the setting of the card slot 305 can be inserted into the outside of the protective shell 101, and then when in use, the baffle 304 needs to be pulled up first, and then the baffle 304 is rotated to a vertical state, and then slide downward, so that the baffle 304 slides downward, and the card slot 305 is inserted into the outside of the protective shell 101, thereby sealing the protective shell 101, thereby better blocking the flame.

[0026] In the above embodiment, as a preferred solution, a sealing mechanism 4 is also included, which includes a collar 401, a hydraulic rod 402 and a mounting hole 403. The collar 401 is detachably connected to the top of the protective shell 101, and the mounting hole 403 is opened at the top of the protective shell 101. The outer surface of the hydraulic rod 402 is fixedly installed with the inner bottom wall of the mounting hole 403. Through the setting of the collar 401, it can be pressed and connected at the top of the protective shell 101, and then after the baffle 304 is closed, the baffle 304 can be pressed and fixed downward, thereby reducing the situation where the baffle 304 moves and causes flame leakage. The collar 401 can be lifted or pulled back by the hydraulic rod 402 installed in the mounting hole 403, so that the baffle 304 can be pressed and fixed more conveniently, and the collar 401 can be connected to the drainage cover 501 by bolts, and then under the pulling of the hydraulic rod 402, the smoke exhaust mechanism 5 can be easily driven to open and reset.

[0027] In the above embodiment, as a preferred solution, the cross-sections of the drainage cover 501 and the block 504 are both trapezoidal, and the smoke exhaust mechanism 5 also includes a smoke exhaust port 506 and a drainage groove 507. The smoke exhaust port 506 is opened at the bottom of the block 504 and is located outside the combustion chamber 505. The smoke exhaust port 506 is used to place the filter material. The drainage groove 507 is opened on the side of the block 504, one end of the drainage groove 507 is located above the smoke exhaust port 506, and the other end of the drainage groove 507 is located below the exhaust hole 502, so as to connect the smoke exhaust port 506 with the exhaust hole 502. The smoke exhaust mechanism 5 further includes an exhaust fan 503, which is installed on the top of the guide cover 501 above the exhaust hole 502 by bolts; The exhaust hole 502 is provided to guide and transport the exhausted smoke, and the drainage groove 507 is provided to allow the smoke to overflow from the drainage groove 507 under the pressure change inside the device, and then the smoke is exhausted outwards, and the exhaust fan 503 is provided to start the exhaust fan 503 after the test is completed, and the exhaust fan 503 can form a negative pressure when working, and then the smoke can be drawn out from the inside of the device through the exhaust hole 502, thereby accelerating the dissipation of heat, reducing the waiting time of the staff, facilitating the cleaning of the inside of the device, and improving the practicality of the device; Through the structural setting of the smoke exhaust port 506, the smoke exhaust port 506 Figure 8As can be seen from the figure, it is composed of three parts: a side plate part, which is the side slope of the block 504, and a bottom plate part, which is the bottom of the block 504. Both the side plate part and the bottom plate part are provided with a number of small holes, and a cavity part is formed between the side plate part and the bottom plate part. Through the several small holes provided on the side plate part and the bottom plate part, the drainage groove 507 is connected to the cavity part, and the space in the protective shell 101 is connected to the cavity part. The bottom plate part can be set as a detachable structure installed by bolts, and the adsorbent can be filled into the cavity part. Due to the setting of the drainage groove 507, the air flow rate is small. When discharging, the smoke is given sufficient time to stay in the cavity part so that it can fully contact with the adsorbent, thereby improving the smoke purification effect and further improving the environmental protection during discharge. The adsorbent can be activated carbon or a sponge block. Through the design that the smoke needs to be retained in the protective shell 101, when the detection is completed and discharged, the remaining smoke can also be fully purified by slow discharge.

[0028] In this embodiment, as a preferred solution, a liquid circulation chamber can also be provided in the block 504 for connecting to external circulating liquid (such as water) to cool the block 504 and the protective shell 101, thereby avoiding damage caused by combustion and extending the service life of the block 504 and the protective shell 101. At the same time, the water in the liquid circulation chamber can also be used for protection. When an unexpected explosion occurs and causes the block 504 to break, the flame can be covered and extinguished to avoid the spread of the flame, thereby improving a certain degree of safety.

[0029] In the above embodiment, as a preferred solution, a supporting mechanism 6 is provided at the bottom of the fixing mechanism 1, and the supporting mechanism 6 includes a supporting seat 601, a socket 602 and a fan 603. The supporting seat 601 is fixedly installed at the bottom of the protective shell 101, and the socket 602 is opened below the outer wall of the supporting seat 601. A plurality of fans 603 are fixedly installed on the outer wall of the supporting seat 601 and are located above the socket 602. Through the setting of the supporting seat 601, the protective shell 101 can be supported and fixed. The fan 603 is an existing well-known technology and is only used for reference. The purpose is to speed up the circulation of air through the setting of the fan 603, so as to deliver sufficient oxygen from the bottom into the protective shell 101, so as to provide the heating mechanism 2 for combustion. The setting of the socket 602 can install and disassemble the collecting mechanism 7.

[0030] In the above embodiment, as a preferred solution, a collecting mechanism 7 is further included, the collecting mechanism 7 includes a limit block 701, a collecting box 702 and a partition 703, the outer surface of the limit block 701 is slidably connected to the inner wall of the insertion hole 602, the end of the collecting box 702 is fixedly connected to the outer wall of the limit block 701, and the partition 703 is fixedly installed on the inner wall of the collecting box 702; The collecting mechanism 7 also includes at least two limiting bolts 704, and the two limiting bolts 704 are threadedly penetrated into the outer wall of the limiting block 701. One end of the limiting bolt 704 passes through the limiting block 701 and is threadedly connected to the outer wall of the supporting seat 601. Through the setting of the limiting block 701, the collecting box 702 can be installed and fixed. When the limiting block 701 is pulled outward, the collecting box 702 can be directly pulled outward, so as to facilitate the staff to collect and process the waste generated after combustion. Through the setting of the limiting bolt 704, the installation stability of the limiting block 701 can be guaranteed.

[0031] In the present invention, the working steps of the device are as follows: 1. First, place the device in a suitable position with the aid of the support base 601. Meanwhile, install and position the collection box 702 and the partition net 703 with the aid of the insertion hole 602, and then fix them with the aid of the limit bolts 704. Then, insert the fixing frame 201 into the guide groove 105. 2. Secondly, the hydraulic rod 402 is extended to lift the collar 401 upward, and then the drainage cover 501 is opened upward, and then the staff can pull the baffle 304 upward, and then rotate the baffle 304 to open one side of the protective shell 101, and then the cable to be measured is passed from the outside of the fixing tube 103 into the threading hole 102, and then passed out from the threading hole 102 on the other side, and then the pressure rod 104 can be tightened to ensure the stability of the cable; 3. Then, the baffle 304 is rotated to a vertical state, and the slot 305 is inserted into the outer side of the protective shell 101. Then, the hydraulic rod 402 is retracted, and the collar 401 and the drainage cover 501 are closed, and the gas can be connected, so that the gas enters the fixing frame 201 through the gas pipe 202, and then the nozzle 203 sprays the gas outward. The gas is ignited to realize the burning test of the cable. During the burning process, the fan 603 can be started to provide sufficient air; 4. After the test is completed, turn off the gas and start the exhaust fan 503 to speed up the gas circulation inside the device, accelerate the heat inside the device to dissipate outward, and quickly reduce the temperature. After the temperature drops to a suitable temperature, the hydraulic rod 402 can be extended to lift the ring 401 upward, and then the drainage cover 501 can be opened upward, and the staff can clean the inside of the device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A performance testing device for low-smoke halogen-free cable materials, characterized by: It comprises a fixing mechanism (1), a heating mechanism (2) and a smoke exhaust mechanism (5), wherein: The fixing mechanism (1) comprises a protective shell (101) and a threading hole (102), wherein the threading hole (102) is formed on both sides of the inner wall of the protective shell (101); The heating mechanism (2) is detachably connected to the bottom of the protective shell (101) and is used to burn the cable located in the protective shell (101); The smoke exhaust mechanism (5) comprises a drainage cover (501), a stopper (504), a combustion chamber (505) and a smoke exhaust port (506); the drainage cover (501) is detachably connected to the top of the protective shell (101); an exhaust hole (502) is provided on the top of the drainage cover (501); the stopper (504) is fixedly connected to the inner wall of the drainage cover (501) and shields the exhaust hole (502); at least a portion of the side surface of the stopper (504) is spaced from the inner wall of the drainage cover (501) so as to allow the exhaust hole (502) to communicate with the inside of the protective shell (101); a combustion chamber (505) is provided at the bottom; the inner side wall of the combustion chamber (505) is arranged in an arc shape; and a protrusion is formed in the middle portion of the inner bottom wall of the combustion chamber (505).

2. The performance testing equipment for low-smoke halogen-free cable materials according to claim 1, characterized in that: The fixing mechanism (1) further comprises a fixing tube (103), a pressure rod (104) and a guide groove (105); the fixing tubes (103) are fixedly mounted on both sides of the outer wall of the protective shell (101) and are located outside the threading hole (102); the pressure rod (104) is threadedly threaded through the top of the fixing tube (103); and the guide groove (105) is provided below the outer wall of the protective shell (101) and is used to assist the sliding of the heating mechanism (2).

3. The performance testing equipment for low-smoke halogen-free cable materials according to claim 2, characterized in that: The heating mechanism (2) comprises a fixing frame (201), a gas pipe (202), a nozzle (203) and a guide block (204); the gas pipe (202) is plugged into the end of the fixing frame (201); the nozzle (203) is fixedly mounted on the top of the fixing frame (201); the guide block (204) is fixedly connected to both sides of the outer surface of the fixing frame (201); and the outer surface of the guide block (204) is slidably connected to the inner wall of the guide groove (105).

4. The performance testing equipment for low-smoke halogen-free cable materials according to claim 1, characterized in that: The invention also comprises a blocking mechanism (3), wherein the blocking mechanism (3) comprises a positioning block (301), a positioning rod (302), an adjusting block (303), a baffle (304) and a slot (305), wherein the two positioning blocks (301) are respectively fixedly mounted on two sides of an outer wall of the protective shell (101), the two positioning rods (302) are respectively threadedly connected to the outer walls of the two positioning blocks (301), the adjusting block (303) is rotatably connected between the two positioning blocks (301) via the positioning rod (302), the baffle (304) is fixedly connected to the outer wall of the adjusting block (303), and the two slots (305) are respectively opened below two sides of the baffle (304).

5. The performance testing equipment for low-smoke halogen-free cable materials according to claim 1, characterized in that: It also comprises a sealing mechanism (4), the sealing mechanism (4) comprising a collar (401), a hydraulic rod (402) and a mounting hole (403), the collar (401) being detachably connected to the top of the protective shell (101), the mounting hole (403) being opened at the top of the protective shell (101), and the outer surface of the hydraulic rod (402) being fixedly mounted to the inner bottom wall of the mounting hole (403).

6. The performance testing equipment for low-smoke halogen-free cable materials according to claim 1, characterized in that: The cross-sections of the drainage cover (501) and the block (504) are both arranged in a trapezoidal shape. The smoke exhaust mechanism (5) further comprises a smoke exhaust port (506) and a drainage groove (507). The smoke exhaust port (506) is provided at the bottom of the block (504) and is located outside the combustion chamber (505). The smoke exhaust port (506) is used to place filter material. The drainage groove (507) is provided on the side of the block (504). One end of the drainage groove (507) is located above the smoke exhaust port (506), and the other end of the drainage groove (507) is located below the exhaust hole (502), so as to connect the smoke exhaust port (506) with the exhaust hole (502).

7. The performance testing equipment for low-smoke halogen-free cable materials according to claim 1, characterized in that: The smoke exhaust mechanism (5) further comprises an exhaust fan (503), wherein the exhaust fan (503) is mounted on the top of the drainage cover (501) via bolts and is located above the exhaust hole (502).

8. The performance testing equipment for low-smoke halogen-free cable materials according to claim 1, characterized in that: A support mechanism (6) is provided at the bottom of the fixing mechanism (1), the support mechanism (6) comprising a support seat (601), a socket (602) and a fan (603), the support seat (601) being fixedly mounted on the bottom of the protective shell (101), the socket (602) being arranged below the outer wall of the support seat (601), and a plurality of fans (603) being fixedly mounted on the outer wall of the support seat (601) and located above the socket (602).

9. The performance testing equipment for low-smoke halogen-free cable materials according to claim 8, characterized in that: It also comprises a collecting mechanism (7), the collecting mechanism (7) comprising a limit block (701), a collecting box (702) and a partition net (703), the outer surface of the limit block (701) being slidably connected to the inner wall of the insertion hole (602), the end of the collecting box (702) being fixedly connected to the outer wall of the limit block (701), and the partition net (703) being fixedly mounted on the inner wall of the collecting box (702).

10. The performance testing equipment for low-smoke halogen-free cable materials according to claim 9, characterized in that: The collecting mechanism (7) further comprises at least two limiting bolts (704), wherein the two limiting bolts (704) are threadedly penetrated through the outer wall of the limiting block (701), and one end of the limiting bolt (704) passing through the limiting block (701) is threadedly connected to the outer wall of the support seat (601).

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