Wire and cable fire resistance test device

Abstract

The utility model discloses an electric wire and cable fire resistance test device, which belongs to the technical field of electric wire and cable fire resistance detection, and is characterized in that a purification mechanism is arranged at the upper part of a fire resistance test device body and comprises a first purification assembly, a second purification assembly and a third purification assembly; harmful smoke generated in the test process can be subjected to multi-stage purification treatment, harmful substances such as carbon monoxide, carbon dioxide, formaldehyde and benzene are effectively removed, pollution to the environment is reduced, and the environmental protection requirement is met; the first purification assembly, the second purification assembly and the third purification assembly are sequentially arranged in the inner cavity of the purification box from bottom to top, so that the first purification assembly, the second purification assembly and the third purification assembly are combined to form a triple purification assembly system to achieve the multi-stage purification treatment effect.

Description

Technical Field

[0001] The utility model relates to the technical field of fire resistance detection of wire and cable, and particularly relates to a wire and cable fire resistance test device. Background Art

[0002] A fire-resistant cable refers to a cable that can operate safely for a certain period of time under the condition of flame combustion; China's national standard GB12666.6 (equivalent to IEC331) divides the fire resistance test into two levels, A and B. For level A, the flame temperature is 950 - 1000 °C, and the continuous fire supply time is 90 minutes. For level B, the flame temperature is 750 - 800 °C, and the continuous fire supply time is 90 minutes. During the entire test period, the specimen should withstand the rated voltage value specified by the product; fire-resistant cables are widely used in places related to fire safety and fire fighting and rescue, such as high-rise buildings, subways, underground streets, large power stations, and important industrial and mining enterprises. For example, the power supply lines and control lines of emergency facilities such as fire-fighting equipment and emergency guide lights. During the production of fire-resistant cables, a fire resistance test device is required to detect the fire resistance performance of the cables under the condition of flame combustion.

[0003] However, some existing fire resistance test devices, for example: Application No.: CN201921509591.X, Application Date: September 11, 2019 discloses a wire and cable fire resistance test device, including a fire resistance test cylinder, a gas pipe, and a gas nozzle; the top of the support frame is of a ring structure, and the top of the support frame is sleeved and fixed on the outer wall of the fire resistance test cylinder; the fire resistance test cylinder is a cylindrical hollow structure, and the fire resistance test cylinder is horizontally located inside the top of the support frame, and an ignition port is provided at the bottom of the fire resistance test cylinder; the smoke exhaust hood is located at the top of the fire resistance test cylinder, and the fire resistance test cylinder is communicated with the external exhaust duct through the smoke exhaust hood; there are two pressure plates, and the two pressure plates are respectively located at the left and right ends of the fire resistance test cylinder; the utility model is beneficial to conducting a fire resistance test on some unqualified cables. The melting rubber dripped by the cable combustion is collected through a water storage tank, so that the melting rubber outside the cable falls into the water storage tank through the interval between the two gas nozzles for cooling, preventing the melting rubber from flowing randomly and polluting the external environment.

[0004] Although the above-mentioned disclosed patent can collect the harmful smoke and dust generated by cable combustion, since these harmful flue gases mainly come from the decomposition, oxidation of cable materials at high temperatures, and fuel gases during the test process. Harmful gases such as carbon monoxide (CO), carbon dioxide (CO2), formaldehyde (HCHO), and benzene (C6H6) that may be generated can have adverse effects on the human body and the environment. If the harmful gases generated by the wire and cable fire resistance test device are not purified, it will lead to the deterioration of air quality and have a serious impact on human health and the ecological environment. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a wire and cable fire resistance test device, which can purify these harmful flue gases and then discharge them into the air, avoiding air pollution and meeting the environmental protection requirements of the air environment.

[0006] To solve the above technical problems, a technical solution adopted by the present utility model is:

[0007] A wire and cable fire resistance test device, comprising:

[0008] A fire resistance test device body;

[0009] A purification mechanism, disposed on the upper part of the fire resistance test device body, for purifying harmful flue gases;

[0010] The purification mechanism includes:

[0011] A purification box;

[0012] A first purification component, disposed at the bottom of the inner cavity of the purification box, for preliminarily filtering harmful flue gases;

[0013] A second purification component, disposed above the first purification component, for further purifying harmful flue gases;

[0014] A third purification component, disposed above the second purification component, for performing multi-stage purification treatment on harmful flue gases.

[0015] According to some embodiments, the first purification component includes:

[0016] A filter plate, disposed at the bottom of the inner cavity of the purification box;

[0017] The filter plate is filled with a zeolite filler.

[0018] According to some embodiments, the filter plate is made of activated carbon or fiber material.

[0019] According to some embodiments, the second purification component is disposed above the filter plate, and the second purification component includes:

[0020] A first fixing plate, fixedly disposed in the inner cavity of the purification box, and the first fixing plate is located above the filter plate;

[0021] A second fixing plate, fixedly disposed above the first fixing plate, and the second fixing plate and the first fixing plate form a combustion cavity for burning harmful flue gases;

[0022] An igniter is provided on one side of the purification box. The igniter is located between the first fixing plate and the second fixing plate and is used to assist in burning harmful flue gas.

[0023] An air inlet is formed on the first fixing plate, and an air inlet valve is arranged at the air inlet.

[0024] An air outlet is formed on the second fixing plate, and an air outlet valve is arranged at the air outlet.

[0025] According to some embodiments, a third purification component is arranged above the second fixing plate. The third purification component includes:

[0026] A first electrode plate is arranged in the inner cavity of the purification box and is located above the second fixing plate.

[0027] A mounting plate is arranged above the first electrode plate.

[0028] A threaded rod is sleeved on the mounting plate, and the top end of the threaded rod passes through the purification box and extends to the outside of the purification box to be connected with a driving motor. The driving motor is arranged on the upper part of the purification box.

[0029] A second electrode plate is sleeved on the threaded rod, and the second electrode plate is located above the mounting plate.

[0030] According to some embodiments, an air inlet pipe is arranged at the bottom of the purification box, and the air inlet pipe extends into the inner cavity of the fire resistance test device body.

[0031] An air outlet pipe is arranged at the upper part of the purification box.

[0032] An induced draft fan is arranged at the air inlet pipe, and an exhaust fan is arranged at the air outlet pipe.

[0033] According to some embodiments, a filter screen is further arranged in the air outlet pipe, and the filter screen is located above the exhaust fan.

[0034] According to some embodiments, the filter screen is made of synthetic fiber mesh or activated carbon fiber material.

[0035] Beneficial effects:

[0036] 1. By arranging a purification mechanism on the upper part of the fire resistance test device body, the purification mechanism includes a first purification component, a second purification component and a third purification component, which can perform multi-stage purification treatment on the harmful flue gas generated during the test, effectively remove harmful substances such as carbon monoxide, carbon dioxide, formaldehyde, benzene, etc., reduce environmental pollution, and meet the environmental protection requirements.

[0037] 2. By arranging the first purification component, the second purification component, and the third purification component in sequence from bottom to top in the inner cavity of the purification box, the first purification component, the second purification component, and the third purification component are combined to form a triple purification component system for multi-stage purification. The first purification component is located at the bottom of the purification box and functions to preliminarily filter the rising harmful flue gas, removing large particulate matter and other precipitable harmful substances. The second purification component is arranged above the first purification component and usually contains more efficient filter materials or chemical adsorbents for removing harmful gases such as carbon monoxide, carbon dioxide, formaldehyde, and benzene in the flue gas to achieve further purification. The third purification component is located above the second purification component and may include more levels of filtration or adsorption technologies to ensure that the flue gas is purified as thoroughly as possible before discharge, reducing the pollutant concentration until it meets the environmental protection requirements.

[0038] Additional aspects and advantages of the utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the utility model. Brief Description of the Drawings

[0039] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0040] Figure 1 Schematic diagram of the present utility model;

[0041] Figure 2 is Figure 1 Stereoscopic cross-sectional view of the purification mechanism shown in

[0042] In the figure, 1 is the main body of the fire resistance test device, 2 is the purification mechanism, 21 is the purification box, 211 is the intake pipe, 212 is the outlet pipe, 213 is the induced draft fan, 214 is the exhaust fan, 215 is the filter screen, 22 is the first purification component, 221 is the filter plate, 222 is zeolite, 23 is the second purification component, 231 is the first fixing plate, 232 is the second fixing plate, 233 is the igniter, 234 is the air inlet, 235 is the air outlet, 24 is the third purification component, 241 is the first electrode plate, 242 is the mounting plate, 243 is the threaded rod, 244 is the driving motor, and 245 is the second electrode plate. Detailed Embodiments

[0043] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0044] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present utility model.

[0045] In the description of the present utility model, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If the first and second are described only for the purpose of distinguishing technical features, it should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0046] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution.

[0047] Combined with Figure 1 and Figure 2 As shown, a wire and cable fire resistance test device includes a fire resistance test device body 1 and a purification mechanism 2.

[0048] The purification mechanism 2 is arranged on the upper part of the fire resistance test device body 1 and is used for purifying harmful flue gas; the purification mechanism 2 includes: a purification box 21, a first purification component 22, a second purification component 23 and a third purification component 24. The first purification component 22 is arranged at the bottom of the inner cavity of the purification box 21 and is used for preliminarily filtering harmful flue gas; the second purification component 23 is arranged above the first purification component 22 and is used for further purifying harmful flue gas; the third purification component 24 is arranged above the second purification component 23 and is used for multi-stage purification treatment of harmful flue gas.

[0049] Among them, a purification mechanism 2 is provided at the upper part of the refractory test device body 1. The purification mechanism 2 includes a first purification component 22, a second purification component 23 and a third purification component 24, which can perform multi-stage purification treatment on the harmful flue gas generated during the test, effectively remove harmful substances such as carbon monoxide, carbon dioxide, formaldehyde, benzene, etc., reduce environmental pollution, and meet environmental protection requirements; by arranging the first purification component 22, the second purification component 23 and the third purification component 24 in the inner cavity of the purification box 21 in sequence from bottom to top, the first purification component 22, the second purification component 23 and the third purification component 24 are combined to form a triple purification component system for multi-stage purification treatment. The first purification component 22 is located at the bottom of the purification box 21, and its function is to preliminarily filter the rising harmful flue gas, remove large particulate matter and other precipitable harmful substances. The second purification component 23 is arranged above the first purification component 22 and usually contains more efficient filter materials or chemical adsorbents for removing harmful gases such as carbon monoxide, carbon dioxide, formaldehyde, benzene, etc. in the flue gas to achieve further purification. The third purification component 24 is located above the second purification component 23 and may contain more levels of filtration or adsorption technologies to ensure that the flue gas is purified as thoroughly as possible before discharge, reduce the pollutant concentration, so as to meet environmental protection requirements until it reaches compliance.

[0050] Combined Figure 2 As shown, the first purification component 22 includes: a filter plate 221. The filter plate 221 is arranged at the bottom of the inner cavity of the purification box 21; a zeolite 222 filler is filled in the filter plate 221. The filter plate 221 is made of activated carbon or fiber material.

[0051] Among them, the design of the first purification component 22 mainly plays the role of pretreatment and preliminary purification. The filter plate 221 is located at the bottom of the purification box 21. The purpose of this design is to intercept and filter the harmful flue gas first during the rising process. The filter plate 221 can be made of activated carbon or fiber material, and both materials have good adsorption properties. Activated carbon is a common adsorption material with a rich internal pore structure and a large surface area, which can effectively adsorb large particulate matter and other precipitable harmful substances in the flue gas, such as dust and soot. Fiber materials also have good adsorption and filtration effects, especially for some tiny particulate matters. It can physically intercept and adsorb through the gaps between the fibers. The zeolite 222 filler, zeolite is a natural mineral with good ion exchange and adsorption properties, especially good at adsorbing certain harmful gas molecules in the flue gas, such as ammonia and hydrogen sulfide. By combining the use of the filter plate 221 and the zeolite 222, the first purification component 22 can effectively remove large particulate matter and some harmful gases in the flue gas, provide purer flue gas for subsequent secondary and tertiary purification, and improve the purification efficiency and effect of the entire purification system.

[0052] In some embodiments, the filter plate 221 can also be made of the following materials:

[0053] 1. Ceramics: Ceramic materials have good high-temperature resistance and mechanical strength, and are suitable for flue gas filtration in high-temperature environments. At the same time, their surface roughness can also help capture particulate matter.

[0054] 2. Metal mesh: Metal meshes such as stainless steel meshes have high strength and corrosion resistance, are suitable for filtering large particulate matter, and can also be applied to high-temperature environments.

[0055] 3. Asbestos: Asbestos fibers have excellent heat resistance and chemical corrosion resistance, but are now used less due to their impact on human health.

[0056] 4. Polymer synthetic materials: Certain polymer synthetic materials such as polytetrafluoroethylene, polyester, etc. have good chemical stability and filtration performance, and can be used for specific flue gas purification.

[0057] 5. Diatomaceous earth: Diatomaceous earth is a natural porous material with a high specific surface area and can adsorb harmful substances in flue gas.

[0058] In addition to zeolite 222, the filler of the filter plate 221 can also contain the following materials to enhance the filtration and adsorption performance:

[0059] 1. Activated alumina: Activated alumina is a strong adsorbent, especially good at adsorbing moisture, organic gases, and some acidic gases.

[0060] 2. Molecular sieve: Molecular sieve is an artificially synthesized porous material with an extremely high specific surface area, can precisely adsorb molecules of specific sizes, and is commonly used to remove harmful gases in flue gas.

[0061] 3. Calcium sulfate / barium sulfate: These materials can be used to adsorb sulfides in flue gas and reduce the emissions of harmful gases such as sulfur dioxide and hydrogen sulfide.

[0062] 4. Titanium dioxide: As an efficient photocatalyst, titanium dioxide can decompose harmful organic compounds in flue gas under ultraviolet light irradiation.

[0063] 5. Manganese oxide, zinc oxide, etc.: These oxides can act as catalysts to promote the chemical reactions of harmful gases and convert them into harmless or low-toxic products.

[0064] 6. Nanomaterials: For example, nano-titanium dioxide can improve the adsorption and photocatalytic ability and has a good removal effect on organic pollutants.

[0065] Combined Figure 2As shown, the second purification component 23 is arranged above the filter plate 221. The second purification component 23 includes: a first fixing plate 231, a second fixing plate 232, and an igniter 233. The first fixing plate 231 is fixedly arranged in the inner cavity of the purification box 21, and the first fixing plate 231 is located above the filter plate 221; the second fixing plate 232 is fixedly arranged above the first fixing plate 231, and the second fixing plate 232 and the first fixing plate 231 form a combustion cavity for the harmful flue gas to burn; the igniter 233 is arranged on one side of the purification box 21, and the igniter 233 is located between the first fixing plate 231 and the second fixing plate 232, and is used to assist in burning the harmful flue gas; an air inlet 234 is opened on the first fixing plate 231, and an air inlet valve is arranged at the air inlet 234; an air outlet 235 is opened on the second fixing plate 232, and an air outlet valve is arranged at the air outlet 235.

[0066] Among them, the design of the second purification component 23 is mainly to further purify the flue gas, especially to remove harmful gas components such as carbon monoxide, volatile organic compounds (VOCs), etc. This component achieves this purpose through combustion. The specific working process is as follows:

[0067] 1. The first fixing plate 231: Located above the filter plate 221, as part of the combustion cavity, it provides structural support.

[0068] 2. The second fixing plate 232: Arranged above the first fixing plate 231, it jointly forms a closed combustion cavity with it, and the flue gas burns in this cavity.

[0069] 3. The igniter 233: Located between the first fixing plate 231 and the second fixing plate 232, it is used to ignite the harmful flue gas entering the combustion cavity, so that the combustible gas in it undergoes an oxidation reaction and is converted into harmless or less harmful gases such as carbon dioxide and water vapor.

[0070] 4. The air inlet 234 and the air inlet valve: The air inlet 234 is used to introduce the flue gas pretreated by the first purification component 22, and the air inlet valve controls the inflow rate of the flue gas to ensure stable and effective combustion.

[0071] 5. The air outlet 235 and the air outlet valve: The air outlet 235 is used to discharge the flue gas after combustion, and the air outlet valve can adjust the outflow speed and amount of the gas to ensure full combustion and prevent the discharge of unburned gas.

[0072] In this way, the second purification component 23 uses the combustion principle to chemically transform the flue gas, converts harmful gases into harmless or less harmful substances, thereby improving the overall purification efficiency and reducing environmental pollution. At the same time, this design also takes into account safety, and controls the inflow and outflow of the flue gas through valves to ensure the controllability of the combustion process.

[0073] CombinedFigure 2 As shown in the figure, a third purification component 24 is arranged above the second fixing plate 232. The third purification component 24 includes: a first electrode plate 241, a mounting plate 242, a mounting plate 242, a threaded rod 243, a driving motor 244, and a second electrode plate 245. The first electrode plate 241 is arranged in the inner cavity of the purification box 21 and is located above the second fixing plate 232; the mounting plate 242 is arranged above the first electrode plate 241; the threaded rod 243 is sleeved on the mounting plate 242, and the top end of the threaded rod 243 passes through the purification box 21 and extends to the outside of the purification box 21 to be connected with the driving motor 244, and the driving motor 244 is arranged on the upper part of the purification box 21; the second electrode plate 245 is sleeved on the threaded rod 243, and the second electrode plate 245 is located above the mounting plate 242.

[0074] Among them, the design of the third purification component 24 is a corona discharge type air purification unit, and its main purpose is to further remove particulate matter and harmful gases in the flue gas, especially those fine particles and harmful gases that cannot be completely removed through combustion. Its working principle and components are as follows:

[0075] 1. The first electrode plate 241: It is arranged above the second fixing plate 232 and serves as the negative electrode to generate corona discharge, and a large number of electrons and ions will be generated during corona discharge.

[0076] 2. The mounting plate 242: It is located above the first electrode plate 241, provides support and fixes the position of the second electrode plate 245.

[0077] 3. The threaded rod 243: By rotating the driving motor 244, the height of the second electrode plate 245 can be adjusted to adapt to the purification requirements under different working conditions.

[0078] 4. The driving motor 244: It is installed on the outer top of the purification box 21 and is used to drive the threaded rod 243 to rotate, thereby adjusting the position of the second electrode plate 245.

[0079] 5. The second electrode plate 245: It serves as the positive electrode and forms an electric field with the first electrode plate 241. When charged particles such as particulate matter and ions in the flue gas pass through the electric field, they will be attracted by the electric field force and thus be captured on the electrode plate.

[0080] Through corona discharge, the particulate matter and harmful gas molecules in the flue gas obtain charges, and then are captured on the electrode plate under the action of the electric field force, realizing the efficient purification of the flue gas. This purification method can effectively remove particulate matter and some harmful gases in the flue gas, such as nitrogen oxides, remaining volatile organic compounds, etc., further improving the purification effect to meet environmental protection requirements. At the same time, by adjusting the electrode plate spacing through the driving motor 244, different purification requirements can be adapted, enhancing the flexibility and practicality of the equipment.

[0081] CombinedFigure 2 As shown, an intake pipe 211 is provided at the bottom of the purification box 21, and the intake pipe 211 extends into the inner cavity of the fire resistance test device body 1; an outlet pipe 212 is provided at the upper part of the purification box 21; an induced draft fan 213 is provided at the intake pipe 211, and an exhaust fan 214 is provided at the outlet pipe 212.

[0082] Among them, the design of the intake pipe 211, outlet pipe 212, induced draft fan 213 and exhaust fan 214 of the purification box 21 is to ensure the effective flow of flue gas and the smooth progress of the purification process. The specific functions are as follows:

[0083] 1. Intake pipe 211: Introduce flue gas from the inner cavity of the fire resistance test device body 1, and introduce the harmful flue gas generated during the test into the purification box 21 for treatment.

[0084] 2. Induced draft fan 213: It is provided at the intake pipe 211 and is used to extract the flue gas in the fire resistance test device body 1 to ensure that the flue gas can continuously and stably enter the purification system for treatment.

[0085] 3. Outlet pipe 212: It is located at the upper part of the purification box 21 and is used to discharge the cleaned gas after multi-stage purification to ensure that the purified flue gas can be safely discharged into the environment.

[0086] 4. Exhaust fan 214: It is provided at the outlet pipe 212 and is used to push the purified flue gas to be discharged through the outlet pipe 212. At the same time, the exhaust fan 214 can maintain the air pressure balance in the purification box 21 to prevent the unpurified flue gas from flowing back.

[0087] Through the cooperation of the induced draft fan 213 and the exhaust fan 214, a continuous air flow cycle is formed to ensure that the flue gas can be effectively extracted from the fire resistance test device body 1, processed by the purification components in the purification box 21, and the purified gas is discharged. Such a design not only ensures the normal progress of the test process but also ensures environmental protection and meets the environmental protection requirements.

[0088] Combined Figure 2 As shown, a filter screen 215 is also provided in the outlet pipe 212. The filter screen 215 is located above the exhaust fan 214, and the filter screen 215 is made of synthetic fiber mesh or activated carbon fiber material.

[0089] Among them, the filter screen 215 in the outlet pipe 212 is arranged above the exhaust fan 214. Its main function is to serve as the last line of defense to further filter the possibly missed fine particles and adsorb the remaining harmful gases to ensure that the discharged gas is as clean as possible. If the material of the filter screen 215 is synthetic fiber mesh or activated carbon fiber, its specific functions are as follows:

[0090] 1. Synthetic fiber mesh: Synthetic fibers have a relatively high porosity and good mechanical strength, enabling effective interception and capture of tiny particulate matter, preventing them from being discharged along with the airflow.

[0091] 2. Activated carbon fiber: Activated carbon fibers have a very high specific surface area and adsorption capacity, which can adsorb and remove trace harmful gases that may exist in the flue gas, such as residual organic compounds, malodorous substances, etc., further improving the purification effect.

[0092] By arranging a filter mesh 215 inside the air outlet pipe 212, the filtration and purification of the purified gas by the system can be enhanced, ensuring that the quality of the gas discharged into the environment meets higher standards and better protecting the environment. At the same time, this also increases the safety and reliability of the system, preventing the discharge of unpurified flue gas due to unexpected situations.

[0093] In some embodiments, in addition to the synthetic fiber mesh and activated carbon fiber, the filter mesh 215 can also be made of the following materials:

[0094] 1. HEPA high-efficiency particulate air filter: HEPA filters can effectively capture particulate matter above 0.3 microns, and have a very good filtration effect on tiny particulate matter, which is widely used in the field of air purification.

[0095] 2. Metal mesh filter: Metal meshes such as stainless steel meshes can filter larger particulate matter, and at the same time have the characteristics of high temperature resistance and durability, and are suitable for high-temperature flue gas environments.

[0096] 3. Ceramic filter: Ceramic filters are resistant to high temperatures and have good chemical stability, are suitable for filtering high-temperature flue gas, and at the same time have certain adsorption properties.

[0097] 4. Nanofiber filter mesh: The diameter of nanofibers is very small, which can improve the filtration efficiency, especially the capture effect on tiny particulate matter.

[0098] 5. PTFE polytetrafluoroethylene membrane filter: PTFE membranes have excellent chemical stability and moisture resistance, and can effectively intercept microparticles and prevent them from penetrating.

[0099] 6. Graphene filter mesh: Graphene has excellent electrical conductivity and adsorption properties, and can be used to remove microparticles and certain harmful gases in the air.

[0100] The working mode of the present utility model is as follows:

[0101] 1. Flue gas collection: During the fire resistance test, the generated harmful flue gas is drawn into the purification box 21 by the induced draft fan 213 through the air inlet pipe 211.

[0102] 2. Preliminary purification: The flue gas first passes through the first purification component 22 provided at the bottom of the purification box 21. The zeolite 222 filler and activated carbon or fiber material in the filter plate 221 are used to preliminarily filter and adsorb the flue gas, removing large particulate matter and other precipitable harmful substances.

[0103] 3. Combustion purification: The preliminarily purified flue gas rises and enters the second purification component 23. In the combustion cavity formed by the first fixing plate 231 and the second fixing plate 232, the igniter 233 ignites the flue gas for combustion treatment, converting harmful gases into harmless or less harmful gases.

[0104] 4. Corona discharge purification: The flue gas after combustion continues to rise and passes through the third purification component 24. Through the corona discharge between the first electrode plate 241 and the second electrode plate 245, the particles and harmful gases in the flue gas are ionized and adsorbed on the electrode plates to further purify the flue gas.

[0105] 5. Final filtration: The purified flue gas passes through the outlet pipe 212 and is finally filtered by the filter net 215 above the exhaust fan 214 to ensure that the discharged gas contains no particles and harmful substances.

[0106] 6. Gas discharge: The gas purified by the filter net 215 is discharged into the atmosphere through the outlet pipe 212 to ensure that the discharged gas meets the environmental protection requirements.

[0107] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present utility model.

Claims

1. A fire resistance test device for wires and cables, characterized in that: include: Fire resistance test device body (1); A purification mechanism (2) is arranged on the upper part of the fire resistance test device body (1) and is used for purifying harmful smoke; The purification mechanism (2) comprises: Purification box (21); A first purification component (22), disposed at the bottom of the inner cavity of the purification box (21), for performing preliminary filtering on harmful smoke; A second purification component (23) is disposed above the first purification component (22) and is used to further purify the harmful smoke; The third purification component (24) is arranged above the second purification component (23) and is used for performing multi-stage purification treatment on harmful flue gas.

2. A fire resistance test device for wires and cables according to claim 1, characterized in that: The first purification component (22) comprises: A filter plate (221) is arranged at the bottom of the inner cavity of the purification box (21); The filter plate (221) is filled with zeolite (222) filler.

3. A fire resistance test device for wires and cables according to claim 2, characterized in that: The filter plate (221) is made of activated carbon or fiber material.

4. A fire resistance test device for wires and cables according to claim 3, characterized in that: The second purification component (23) is arranged above the filter plate (221), and the second purification component (23) comprises: A first fixing plate (231) is fixedly disposed in the inner cavity of the purification box (21), wherein the first fixing plate (231) is located above the filter plate (221); A second fixing plate (232) is fixedly disposed above the first fixing plate (231), wherein the second fixing plate (232) and the first fixing plate (231) form a combustion cavity for burning harmful smoke; An igniter (233) is provided on one side of the purification box (21), and the igniter (233) is located between the first fixing plate (231) and the second fixing plate (232), and is used for assisting the combustion of harmful smoke; An air inlet (234) is provided on the first fixing plate (231), and an air inlet valve is provided at the air inlet (234); The second fixing plate (232) is provided with an air outlet (235), and an air outlet valve is provided at the air outlet (235).

5. A fire resistance test device for wires and cables according to claim 4, characterized in that: The third purification component (24) is arranged above the second fixing plate (232), and the third purification component (24) comprises: A first electrode plate (241) is disposed in the inner cavity of the purification box (21) and is located above the second fixing plate (232); A mounting plate (242) disposed above the first electrode plate (241); A threaded rod (243) is sleeved on the mounting plate (242), and the top end of the threaded rod (243) passes through the purification box (21) and extends to the outside of the purification box (21) to be connected to a drive motor (244), and the drive motor (244) is arranged on the upper part of the purification box (21); The second electrode plate (245) is sleeved on the threaded rod (243), and the second electrode plate (245) is located above the mounting plate (242).

6. A fire resistance test device for wires and cables according to claim 1, characterized in that: An air inlet pipe (211) is provided at the bottom of the purification box (21), and the air inlet pipe (211) extends into the inner cavity of the fire resistance test device body (1); An air outlet pipe (212) is provided at the upper portion of the purification box (21); The air inlet pipe (211) is provided with an induced-flow fan (213), and the air outlet pipe (212) is provided with an exhaust fan (214).

7. A fire resistance test device for wires and cables according to claim 6, characterized in that: A filter screen (215) is also provided in the air outlet pipe (212), and the filter screen (215) is located above the exhaust fan (214).

8. A fire resistance test device for wires and cables according to claim 7, characterized in that: The filter screen (215) is made of a synthetic fiber screen or an activated carbon fiber material.

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