Performance testing equipment for a low-smoke and halogen-free cable material

Abstract

The present invention relates to the technical field of cable detection, and discloses a performance testing device for low-smoke and halogen-free cable materials, including a fixing mechanism, a heating mechanism and a smoke exhaust mechanism, wherein: the fixing mechanism includes a protective shell and a wire threading hole, and the wire threading holes are opened on both sides of the inner side wall of the protective shell; the heating mechanism is detachably connected to the lower part of the outer wall of the fixing mechanism for heating the cable; the smoke exhaust mechanism includes a drainage cover, a baffle, a combustion chamber and a smoke exhaust port. For this performance testing device for low-smoke and halogen-free cable materials, through the cooperative setting of the baffle and the combustion chamber, when the cable is burned by the flame, the smoke can flow upward into the combustion chamber, and then the shape of the combustion chamber is used to gather the generated smoke, thereby producing a reflux effect. Therefore, during the continuous burning of the flame, the refluxing smoke can be re-ignited, further reducing the concentration of the smoke and reducing the impact on the surrounding environment when discharged outward.

Description

Technical Field

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

[0002] A cable refers to a wire for transmitting electric energy, mainly used for outdoor overhead lines, indoor busbars and switch cabinets. After the cable is produced, its flame retardant and fire-resistant performance needs to be detected. The cable fire-resistant performance detection is a test to evaluate whether the cable can continuously operate under specified conditions when burning under specified fire sources and time.

[0003] A low-smoke and halogen-free cable refers to a cable whose insulating layer material contains halogen substances. In the case of combustion, it does not release halogen-containing gases and has a low smoke concentration. When there is a fire source around the low-smoke and halogen-free cable, the high temperature of the flame will cause the insulating and sheathing materials of the cable to burn. Even if these materials have the characteristics of low smoke and halogen-free, some smoke will still be generated during the combustion process. Because during the combustion process, the chemical bonds in the materials will be broken, generating various gases and solid particles, and these substances are mixed to form smoke. During the cable production process, it is often necessary to detect the fire-resistant ability of the cable. Currently, when detecting the fire-resistant performance of the cable, the cable needs to be burned for a long time to test the fire-resistant ability of the cable. However, when the flame burns the cable skin for testing, smoke will still be generated due to material problems. In the test environment, especially in a sealed environment, more smoke is likely to affect the physical health of the staff, and there is a lack of a structure for treating smoke. Therefore, the smoke can only be directly discharged to the outside, and the smoke cannot be effectively treated and directly discharged to the outside, causing pollution. Summary of the Invention

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

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

[0006] Design a performance testing device for low-smoke and halogen-free cable materials, including a fixing mechanism, a heating mechanism and an exhaust mechanism, where:

[0007] The fixing mechanism includes a protective shell and threading holes, and the threading holes are opened on both sides of the inner side wall of the protective shell;

[0008] The heating mechanism is detachably connected to the bottom of the protective shell and is used for burning the cable located in the protective shell;

[0009] The smoke exhaust mechanism includes a drainage cover, a stopper, 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 at the top of the drainage cover. The stopper is fixedly connected to the inner wall of the drainage cover and shields the exhaust hole. At least a part of the side surface of the stopper is spaced from the inner wall of the drainage cover for the exhaust hole to communicate with the inside of the protective shell. A combustion chamber is provided at the bottom, and the inner side wall of the combustion chamber is arranged in an arc shape. A protrusion is formed in the middle of the inner bottom wall of the combustion chamber.

[0010] Optionally, the fixing mechanism further includes fixing cylinders, pressing rods, and guiding grooves. A plurality of the fixing cylinders are respectively fixedly installed on both sides of the outer wall of the protective shell and outside the wire passing holes. The pressing rods are threadedly inserted through the tops of the fixing cylinders. The guiding grooves are provided below the outer wall of the protective shell for assisting the sliding of the heating mechanism.

[0011] Optionally, the heating mechanism includes a fixing frame, a gas pipe, a nozzle, and guiding blocks. The gas pipe is inserted into the end of the fixing frame. The nozzle is fixedly installed on the top of the fixing frame. The guiding blocks are fixedly connected to both sides of the outer surface of the fixing frame, and the outer surfaces of the guiding blocks are slidably connected to the inner walls of the guiding grooves.

[0012] Optionally, it further includes a blocking mechanism. The blocking mechanism includes positioning blocks, positioning rods, an adjusting block, a baffle, and clamping grooves. Two of the positioning blocks are respectively fixedly installed on both sides of the outer wall of the protective shell. Two of the positioning rods are respectively threadedly connected to the outer walls of the two positioning blocks. The adjusting block is rotatably connected between the two positioning blocks through the positioning rods. The baffle is fixedly connected to the outer wall of the adjusting block. Two of the clamping grooves are respectively provided below both sides of the baffle.

[0013] Optionally, it further includes a sealing mechanism. The sealing mechanism includes a collar, a hydraulic rod, and a mounting hole. The collar is detachably connected to the top of the protective shell. The mounting hole is provided at the top of the protective shell. The outer surface of the hydraulic rod is fixedly installed on the inner bottom wall of the mounting hole.

[0014] Optionally, the cross-sections of the drainage cover and the stopper are both trapezoidal. The smoke exhaust mechanism further includes a smoke exhaust port and a drainage groove. The smoke exhaust port is provided at the bottom of the stopper and outside the combustion chamber. Filter materials are placed in the smoke exhaust port. The drainage groove is provided on the side surface of the stopper. One end of the drainage groove is above the smoke exhaust port, and the other end is below the exhaust hole for communicating the smoke exhaust port with the exhaust hole.

[0015] Optionally, the smoke exhaust mechanism further includes an exhaust fan. The exhaust fan is installed above the exhaust hole on the top of the drainage cover through bolts.

[0016] Optionally, a support mechanism is provided at the bottom of the fixing mechanism. The support mechanism includes a support base, insertion holes, and fans. The support base is fixedly installed at the bottom of the protective shell. The insertion holes are opened below the outer wall of the support base. A plurality of the fans are fixedly installed above the insertion holes on the outer wall of the support base.

[0017] Optionally, a collection mechanism is further included. The collection mechanism includes a limit block, a collection box, and a partition net. The outer surface of the limit block is slidably connected to the inner wall of the insertion hole. One end of the collection box is fixedly connected to the outer wall of the limit block. The partition net is fixedly installed on the inner side wall of the collection box.

[0018] Optionally, the collection mechanism further includes at least two limit bolts. The two limit bolts are threadedly inserted through the outer wall of the limit block. The end of the limit bolt protruding out of the limit block is threadedly connected to the outer wall of the support base.

[0019] The present invention provides a performance testing device for low-smoke and halogen-free cable materials, having the following beneficial effects:

[0020] The performance testing device for low-smoke and halogen-free cable materials enables the low-smoke and halogen-free cable to be inspected to pass through the threading hole and enter the protective shell for inspection. After the low-smoke and halogen-free cable is located inside the protective shell, the heating mechanism is started. The heating mechanism generates a flame to burn the low-smoke and halogen-free cable for fire resistance performance detection. During the burning of the low-smoke and halogen-free cable, a small amount of smoke will be generated due to combustion. The smoke flows upward along with the airflow generated by the flame into the combustion chamber opened in the baffle, and will not be discharged through the exhaust holes on the drainage cover. The smoke flowing into the combustion chamber is dispersed from the protrusion on the inner bottom wall of the combustion chamber to the inner side wall of the combustion chamber. Through the arc-shaped inner side wall of the combustion chamber, a buffering effect is generated on the smoke, resulting in a falling-back effect, so that the smoke enters the protective shell again. During the continuous burning of the flame, the refluxed smoke is ignited by the continuously burning flame for secondary ignition, further reducing the concentration of the smoke. When discharged outward, it can reduce the impact on the surrounding environment. Through the cooperative setting of the drainage cover and the smoke exhaust port, the smoke can be burned twice, and the waste gas is discharged outward through the smoke exhaust port, minimizing the concentration of the smoke to the greatest extent and improving the safety and environmental protection during detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall installation structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the installation structure of the support mechanism of the present invention;

[0023] Figure 3 It is a schematic diagram of the installation structure of the heating mechanism of the present invention;

[0024] Figure 4 It is a schematic exploded view of the fixing mechanism of the present invention;

[0025] Figure 5 This is a schematic explosion structure diagram of the blocking mechanism of the present invention;

[0026] Figure 6 This is a schematic explosion structure diagram of the sealing mechanism of the present invention;

[0027] Figure 7 This is a schematic installation structure diagram of the exhaust fan of the present invention;

[0028] Figure 8 This is a schematic cross-sectional structure diagram of the drainage cover of the present invention;

[0029] Figure 9 This is a schematic cross-sectional structure diagram of the stop block of the present invention;

[0030] Figure 10 This is a schematic explosion structure diagram of the collection mechanism of the present invention.

[0031] In the figure: 1. Fixing mechanism; 101. Protective shell; 102. Threading hole; 103. Fixed cylinder; 104. Pressing rod; 105. Guide groove; 2. Heating mechanism; 201. Fixed frame; 202. Gas pipe; 203. Spray port; 204. Guide block; 3. Blocking mechanism; 301. Positioning block; 302. Positioning rod; 303. Adjusting block; 304. Baffle; 305. Card slot; 4. Sealing mechanism; 401. Collar; 402. Hydraulic rod; 403. Installation hole; 5. Smoke exhaust mechanism; 501. Drainage cover; 502. Exhaust hole; 503. Exhaust fan; 504. Stop block; 505. Combustion chamber; 506. Smoke exhaust port; 507. Drainage groove; 6. Support mechanism; 601. Support seat; 602. Jack; 603. Fan; 7. Collection mechanism; 701. Limit block; 702. Collection box; 703. Separation net; 704. Limit bolt. Detailed implementation manners

[0032] 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. 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.

[0033] Please refer to Figures 1 to 10 , the embodiment of the present invention provides a performance detection device, which is applied to the scenario of fire protection performance detection during the cable detection process. In this embodiment, by improving the structure of the detection mechanism, it has the advantages of reducing the smoke emission concentration and impact. Specifically, taking the fire protection performance detection of the cable as an example, so as a preferred solution in this embodiment, the detection mechanism is specifically a performance test device for low-smoke and halogen-free cable materials, which can re-ignite and guide the smoke generated when the cable is burned by the flame.

[0034] Please refer to Figures 1 to 10 , the present invention provides a technical solution: a performance testing device for a low-smoke and halogen-free cable material, and this detection device is mainly applied to the scenario of fire performance detection during the cable detection process.

[0035] It includes a fixing mechanism 1, a heating mechanism 2 and an exhaust mechanism 5, wherein:

[0036] 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 side wall of the protective shell 101;

[0037] The heating mechanism 2 is detachably connected to the bottom of the protective shell 101 and is used for burning the cable located in the protective shell 101;

[0038] The exhaust mechanism 5 includes a drainage cover 501, a stop 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 opened on the top of the drainage cover 501. The stop block 504 is fixedly connected to the inner wall of the drainage cover 501 and shields the exhaust hole 502. At least part of the side surface of the stop block 504 is spaced from the inner wall of the drainage cover 501 for the exhaust hole 502 to communicate with the inside of the protective shell 101, and a combustion chamber 505 is opened 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.

[0039] 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.

[0040] 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;

[0041] Meanwhile, through the secondary combustion experiment on the smoke, the safety of the tested low-smoke zero-halogen cable when used in a relatively enclosed space can be simulated and detected. That is, in a warehouse or an electrical control room, when the tested low-smoke zero-halogen cable is on fire, whether there will be an explosion when the smoke concentration reaches a certain level, and further whether there will be an explosion;

[0042] By retaining the smoke in the combustion chamber 505, a smoke concentration detection sensor can also be set. The concentration of the smoke in the combustion chamber 505 is detected by the smoke concentration detection sensor, that is, the laser smoke sensor. Then, the rate and concentration of the smoke released when the tested low-smoke zero-halogen cable is on fire are analyzed to determine whether it meets the standard. Also, the comparison between the concentration consumption when the smoke is ignited and the rate of the smoke released when the tested low-smoke zero-halogen cable is on fire is analyzed to determine whether it meets the standard;

[0043] When the concentration of the smoke reaches the safety threshold, check the combustion state during the secondary combustion of the smoke. During the secondary combustion process, the situation of the repeated combustion of the low-smoke zero-halogen cable in a confined space can be simulated, and the risk of re-ignition can be evaluated. This helps to understand whether the cable will cause a more serious fire due to re-ignition during actual use, and is convenient for taking more effective preventive measures;

[0044] Meanwhile, 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 smoke in different experimental conditions, that is, different usage scenarios, as well as the flow path and diffusion rate in a relatively enclosed usage environment.

[0045] In the above embodiment, as a preferred solution, the fixing mechanism 1 further includes fixing cylinders 103, pressing rods 104 and guide grooves 105. A plurality of fixing cylinders 103 are respectively fixedly installed on both sides of the outer wall of the protective shell 101 and are located outside the wire passing hole 102. The pressing rod 104 is threadedly passed through the top of the fixing cylinder 103. The guide groove 105 is opened below the outer wall of the protective shell 101 and is used for assisting the sliding of the heating mechanism 2. Through the cooperative setting of the fixing cylinder 103 and the pressing rod 104, the cable can be tightly pressed and limitedly fixed outside the wire passing hole 102, thereby ensuring the stability of the cable during the test, and further reducing the shaking of the cable during the test. Through the setting of the guide groove 105, the heating mechanism 2 can be installed and guided, and thus it is convenient to install and disassemble and repair the heating mechanism 2.

[0046] 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 guiding block 204. The gas pipe 202 is inserted into the end of the fixing frame 201, the nozzle 203 is fixedly installed on the top of the fixing frame 201, the guiding blocks 204 are fixedly connected to both sides of the outer surface of the fixing frame 201, and the outer surface of the guiding block 204 is slidably connected to the inner wall of the guiding groove 105. Through the setting of the fixing frame 201, the gas pipe 202 and the nozzle 203 can be installed, so as to convey and guide the gas in the gas pipe 202, and then supply gas to the nozzle 203, so that the nozzle 203 sprays the flame, and then heats the cable with the flame. The setting of the guiding block 204 can cooperate with the guiding groove 105, which is convenient for the installation and guiding of the fixing frame 201, and then improves the practicability of the device.

[0047] In the above embodiment, as a preferred solution, it further includes a blocking mechanism 3. The blocking mechanism 3 includes a positioning block 301, a positioning rod 302, an adjusting block 303, a baffle 304 and a card slot 305. The two positioning blocks 301 are respectively fixedly installed on both sides of the 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 through the positioning rod 302, the baffle 304 is fixedly connected to the outer wall of the adjusting block 303, and the two card slots 305 are respectively opened below both sides of the baffle 304. Through the cooperative setting of the positioning block 301 and the positioning rod 302, the auxiliary rotation and sliding of the adjusting block 303 can be realized, so as to facilitate the rotation and sliding of the baffle 304. The setting of the card slot 305 can be inserted into the outside of the protective shell 101. When in use, first, the baffle 304 needs to be pulled up, then rotated to the vertical state, and then slid down, so that the baffle 304 slides down, and the card slot 305 is inserted into the outside of the protective shell 101, so as to seal the protective shell 101 and better block the flame.

[0048] In the above embodiments, as a preferred solution, a sealing mechanism 4 is further included. The sealing mechanism 4 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. 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 on the inner bottom wall of the mounting hole 403. Through the arrangement of the collar 401, a pressing connection can be made at the top of the protective shell 101. Further, after the baffle 304 is closed, the baffle 304 can be pressed downward and fixed, thereby reducing the situation of flame leakage caused by the movement of the baffle 304. The hydraulic rod 402 installed in the mounting hole 403 can push the collar 401 upward or pull it back, which is more convenient for pressing and fixing the baffle 304. The collar 401 can be connected to the drainage cover 501 through bolts. Further, under the pulling of the hydraulic rod 402, the smoke exhaust mechanism 5 can be easily driven to open and reset.

[0049] In the above embodiments, as a preferred solution, the cross-sections of the drainage cover 501 and the stopper 504 are both trapezoidal. The smoke exhaust mechanism 5 further includes a smoke exhaust port 506 and a drainage groove 507. The smoke exhaust port 506 is opened at the bottom of the stopper 504 and is located outside the combustion chamber 505. Filter materials are placed in the smoke exhaust port 506. The drainage groove 507 is opened on the side of the stopper 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, which is used to connect the smoke exhaust port 506 and the exhaust hole 502.

[0050] The smoke exhaust mechanism 5 further includes an exhaust fan 503. The exhaust fan 503 is installed on the top of the drainage cover 501 through bolts and is located above the exhaust hole 502.

[0051] Through the arrangement of the exhaust hole 502, the discharged smoke can be guided and conveyed. Through the arrangement of the drainage groove 507, under the pressure change inside the device, the smoke can overflow from the drainage groove 507 and then be discharged outward. Through the arrangement of the exhaust fan 503, after the test is completed, the exhaust fan 503 can be started. When the exhaust fan 503 works, a negative pressure can be formed, and then the smoke can be pumped out 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 practicability of the device.

[0052] Through the structural arrangement of the smoke exhaust port 506, the smoke exhaust port 506 starts from Figure 8It can be seen that it consists of three parts. The side plate part is the side slope of the baffle 504, and the bottom plate part is the bottom of the baffle 504. A number of small holes are provided in both the side plate part and the bottom plate part. A cavity part is formed between the side plate part and the bottom plate part. Through the number of small holes provided in the side plate part and the bottom plate part, the drainage groove 507 is communicated with the cavity part, and the space inside the protective shell 101 is communicated with the cavity part. The bottom plate part can be set as a detachable structure installed by bolts, and an adsorption substance can be filled into the cavity part. Due to the setting of the drainage groove 507, the air flow rate is small. When discharging, it gives the smoke sufficient time to stay in the cavity part, and can fully contact the adsorption substance, thereby improving the smoke purification effect and further improving the environmental protection during discharge. The adsorption substance can be activated carbon or a sponge block. Through the design of retaining the smoke in the protective shell 101, when discharging after the detection is completed, the remaining smoke can also be purified by slow discharge.

[0053] In this embodiment, as a preferred solution, a liquid circulation cavity can also be provided in the baffle 504 for connecting external circulating liquid (such as water) to cool the baffle 504 and the protective shell 101, avoid damage caused by combustion, extend the service life of the baffle 504 and the protective shell 101, and at the same time, the water in the liquid circulation cavity can also be used for protection. When an accidental deflagration causes the baffle 504 to break, it can cover the flame and extinguish the flame to avoid the spread of the flame and improve a certain degree of safety.

[0054] In the above embodiment, as a preferred solution, a support mechanism 6 is provided at the bottom of the fixing mechanism 1. The support mechanism 6 includes a support base 601, a jack 602, and a fan 603. The support base 601 is fixedly installed at the bottom of the protective shell 101. The jack 602 is opened below the outer wall of the support base 601. A plurality of fans 603 are fixedly installed above the jack 602 on the outer wall of the support base 601. Through the setting of the support base 601, the protective shell 101 can be supported and fixed. The fan 603 is a known technology in the art and is only cited here. The purpose is to accelerate the air circulation speed through the setting of the fan 603, and then send sufficient oxygen into the protective shell 101 from below for the heating mechanism 2 to burn. The setting of the jack 602 enables the installation and disassembly of the collection mechanism 7.

[0055] In the above embodiment, as a preferred solution, a collection mechanism 7 is further included. The collection mechanism 7 includes a limit block 701, a collection box 702, and a partition net 703. The outer surface of the limit block 701 is slidably connected to the inner wall of the jack 602. The end of the collection box 702 is fixedly connected to the outer wall of the limit block 701. The partition net 703 is fixedly installed on the inner side wall of the collection box 702;

[0056] The collecting mechanism 7 further includes at least two limit bolts 704. The two limit bolts 704 are threadedly inserted through the outer wall of the limit block 701. One end of the limit bolt 704 passing through the limit block 701 is threadedly connected to the outer wall of the support base 601. Through the arrangement of the limit block 701, the collecting box 702 can be installed and fixed. When the limit block 701 is pulled outwards, the collecting box 702 can be directly pulled outwards, which is convenient for the staff to collect and process the waste generated after combustion. Through the arrangement of the limit bolts 704, the installation stability of the limit block 701 can be ensured.

[0057] In the present invention, the working steps of the device are as follows:

[0058] 1. First, place the device at a suitable position by means of the support base 601. At the same time, install and position the collecting box 702 and the partition net 703 through the jack 602, and then fix them by means of the limit bolts 704. Then insert the fixing frame 201 into the guiding groove 105.

[0059] 2. Second, extend the hydraulic rod 402, then the collar 401 can be lifted upwards, and then the drainage cover 501 can be opened upwards. Then the staff can pull up the baffle 304 upwards, and then rotate the baffle 304 to open one side of the protective shell 101. Then insert the cable to be measured into the threading hole 102 from the outside of the fixing cylinder 103 and pass through the threading hole 102 on the other side. Then tighten the pressure rod 104 to ensure the stability of the cable.

[0060] 3. Then, rotate the baffle 304 to a vertical state, then snap the card slot 305 onto the outside of the protective shell 101. Then retract the hydraulic rod 402 to close the collar 401 and the drainage cover 501. Then connect the gas, and the gas enters the fixing frame 201 through the gas pipe 202. Then the nozzle 203 sprays the gas outwards to ignite the gas to realize the burning test of the cable. The fan 603 can be started during the burning process to provide sufficient air.

[0061] 4. After the test is completed, turn off the gas, then start the exhaust fan 503 to accelerate the gas flow rate inside the device, accelerate the heat dissipation of the device to the outside, and make the temperature drop rapidly. After the temperature drops to a suitable temperature, the hydraulic rod 402 can be extended, then the collar 401 can be lifted upwards, and then the drainage cover 501 can be opened upwards. The staff can clean the inside of the device.

[0062] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. 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 two sides of an 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 at the middle portion of the inner bottom wall of the combustion chamber (505); 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).

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 smoke exhaust mechanism (5) further comprises an exhaust fan (503), and the exhaust fan (503) is mounted on the top of the drainage cover (501) by means of bolts and is located above the exhaust hole (502).

7. 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).

8. The performance testing equipment for low-smoke halogen-free cable materials according to claim 7, 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).

9. The performance testing equipment for low-smoke halogen-free cable materials according to claim 8, 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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