CN113237992A - Power cable combustion test device and method - Google Patents
Power cable combustion test device and method Download PDFInfo
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- CN113237992A CN113237992A CN202110388753.4A CN202110388753A CN113237992A CN 113237992 A CN113237992 A CN 113237992A CN 202110388753 A CN202110388753 A CN 202110388753A CN 113237992 A CN113237992 A CN 113237992A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
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Abstract
A power cable combustion test device and a method thereof are disclosed, wherein shells of a water, electricity and gas supply area, a tunnel combustion simulation area, a channel combustion simulation area and a tail gas treatment area are all made of reinforced containers; the water, electricity and gas supply area supplies water, electricity and gas required in the simulation test to the tunnel combustion simulation area and the channel combustion simulation area; the tunnel combustion simulation area and the channel combustion simulation area are used for simulating a power cable combustion test, a cable support, a test cable, a flame spray gun, an atomizing spray head, a gas fire extinguishing spray head and a sensor are arranged in the tunnel combustion simulation area and the channel combustion simulation area, and an air supply and exhaust device, a water, electricity and gas pipeline interface and a drainage and sewage outlet are arranged on a shell of the tunnel combustion simulation area and the channel combustion simulation area; the tail gas treatment area is respectively connected with the other ends of the tunnel combustion simulation area and the channel combustion simulation area and is used for treating test waste gas generated by the tunnel combustion simulation area and the channel combustion simulation area. The device and the method can invert the fire condition of the cable channel, develop the verification test of the fireproof product and facilitate the integration of small-size fireproof equipment.
Description
Technical Field
The invention relates to the field of power transmission, in particular to a power cable combustion test device and a power cable combustion test method.
Background
Electric power, the most important energy supply method, relies on cable tunnels for long-distance transmission. However, since the cable tunnel environment is relatively closed, the tunnel environment is harsh, and cable tunnel fires frequently occur. The fire disaster is difficult to extinguish and rescue, easy to reburn, long in extinguishing time and easy to cause huge damage to the safety of the tunnel structure. Although the fire generally cannot cause casualties, the fire frequently occurs in production departments, so that the safety factor of power transmission is seriously reduced, the production safety is also seriously hindered, the local economic development and the normal life of people are influenced, immeasurable loss is brought to the social development and the life of people, and adverse social effects are caused, and the fire problem of the cable tunnel is also a problem which is highly valued in the power industry.
At present, the cable tunnel design and construction at the initial stage of domestic construction are incomplete because the domestic research on cable fire starts relatively late. With the improvement of the integration of urban buildings and the rapid increase of the demand of electric power, in recent years, a large number of distribution cables and user cables enter a power transmission cable channel, the load level of cable lines is improved, and gas and heat pipelines are introduced near a cable cabin in the design and construction process of an urban comprehensive pipe gallery. This just leads to the conflagration risk to increase along with the time of the operation, and the probability that the cable broke down in the operation also can improve, and the suppression of fire after the conflagration measure relatively limited, and cable run fire monitoring early warning prevention and cure is more difficult.
In the prior art, fire prevention measures such as flame-retardant cables, fire-proof doors and fire-proof coatings are mainly adopted for the fire prevention of cable lines and channels. The prior art document 1 (CN 111929404 a) is a prior application of the applicant of the present application, and discloses a fireproof material detection combination platform for cables, wherein in the detection of the fireproof performance of the cables, a few combustion performance sampling tests such as flammability and the like are mainly performed, and the comprehensive evaluation of the combustion performance of the cables cannot be made; in the detection of the cable channel fireproof plugging material, at present, only a flame retardant performance test is carried out aiming at a cable protection pipe, a cable fireproof groove box and the like, and an integral evaluation method is lacked; in the aspect of cable channel fire prevention, at present, work is mostly focused on the arrangement and control of cable fire prevention measures and fire safety measures, and a solution for the technical method of channel fire occurrence development and emergency disposal is lacked. In the field of similar combustion devices, prior art document 2 (CN 104764011A) discloses a container type combustion device, but the device is mainly used for a flare system of a petrochemical plant, and has no substantial reference for the research and development of a power cable combustion test device.
On the other hand, fault early warning is carried out by monitoring the running state of the cable, the resistance value problem is upgraded into a fire disaster after the fault occurs, and the coping strategy after the fire disaster occurs is always the key point of research. However, most of the research is only carried out for cable fire, and the existing research has a great divergence in the understanding of the occurrence and development law of fire in the tunnel, and the analysis of the fire characteristics of the cable tunnel is not deep enough. For example, prior art document 3 (CN 204255891U) discloses an integrated machine for fire-resistant combustion test of wires and cables, which uses a control cabinet to freely combine with a hammering combustion workbench, a fire-resistant combustion workbench and a spraying combustion workbench, but cannot simulate the occurrence and development rules of fire in a tunnel.
At present, a cable combustion test in a part of cable channels is carried out in a real cable channel, and the cable channels are easy to damage after the test, so that the subsequent use of the channels is influenced. Repeatable combustion test inversion under a cable channel scene needs to be solved urgently.
Therefore, there is a need for a power cable combustion test apparatus and method, which can accurately simulate the combustion process of a power cable and provide a comprehensive and accurate fire analysis of a cable tunnel.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a power cable combustion test device and a power cable combustion test method, which are used for simulating the fire process of a power cable in a tunnel combustion simulation area and a channel combustion simulation area and providing power cable fire analysis based on the fire process.
The invention adopts the following technical scheme. The invention relates to a power cable combustion test device, which comprises a water, electricity and gas supply area, a tunnel combustion simulation area, a channel combustion simulation area and a tail gas treatment area, wherein shells of the water, electricity and gas supply area, the tunnel combustion simulation area, the channel combustion simulation area and the tail gas treatment area are all made of reinforced containers; the water, electricity and gas supply area is respectively connected with one end of the tunnel combustion simulation area and one end of the channel combustion simulation area through pipelines and supplies water, electricity and gas required in the simulation test to the tunnel combustion simulation area and the channel combustion simulation area; the tunnel combustion simulation area and the trench combustion simulation area are used for simulating a power cable combustion test, a cable support, a test cable, a flame spray gun, an atomizing nozzle, a gas fire extinguishing nozzle and a sensor are arranged in the tunnel combustion simulation area and the trench combustion simulation area, and an air supply and exhaust device, a water and electricity pipeline interface and a drainage and sewage outlet are arranged on a shell of the tunnel combustion simulation area and the trench combustion simulation area; the tail gas treatment area is respectively connected with the other ends of the tunnel combustion simulation area and the channel combustion simulation area through pipelines, and is used for treating test waste gas generated by the tunnel combustion simulation area and the channel combustion simulation area.
Preferably, the shell of the tunnel combustion simulation area is formed by transforming 40-size high-cabinet containers, the shell of the channel combustion simulation area is formed by transforming 20-size high-cabinet containers, and the tunnel combustion simulation area and the channel combustion simulation area are sequentially arranged in an end-to-end mode by adopting a plurality of sections of containers so as to meet the length requirement of the combustion simulation area.
Preferably, the inside in channel simulation test district is provided with the cable pit, and the cable pit top has swing joint's apron, and cable support, experimental cable and combustor are provided with to the cable pit inside.
Preferably, the inner wall of the shell of the tunnel combustion simulation area is sequentially provided with a heat insulation material layer, a fire-resistant layer and a heat insulation layer; a fire-resistant layer and a heat-insulating layer are sequentially arranged on the inner wall of a cable trench of the trench combustion simulation area; wherein, insulating material layer, flame retardant coating, insulating layer are used for insulating the heat that the experiment produced.
Preferably, the cable support is arranged on the side wall of the cable trench in the tunnel combustion simulation area and the trench combustion simulation area and used for placing the test cable; the flame spray gun is arranged below the cable support and used for igniting the cable.
Preferably, the atomizing nozzle and the gas fire extinguishing nozzle are arranged on top plates of the tunnel combustion simulation area and the channel combustion simulation area and used for cooling, dedusting and extinguishing fire for the combustion test area; the atomizing nozzle and the gas fire extinguishing nozzle are connected with the pipeline and receive corresponding supply from a water, electricity and gas supply area through a water, electricity and gas pipeline interface arranged on the shell.
Preferably, the sensor comprises a fire detection sensor for detecting smoke and temperature rise in the test area and starting the gas fire extinguishing nozzle to extinguish fire based on the detection result.
Preferably, the sensor further comprises an environmental monitoring sensor for monitoring the composition and concentration of the gas in the simulated test zone.
Preferably, the air supply and exhaust device is used for supplying the test gas in the water and electricity gas supply area to the combustion test area and supplying the combustion waste gas in the combustion test area to the tail gas treatment area; wherein, air supply device is communicated with the water, electricity and gas supply area, and the exhaust device is communicated with the tail gas treatment area.
Preferably, a sub-control box, a distribution box, an infrared camera and an explosion-proof lamp are further arranged in the combustion simulation area; wherein, branch control box and block terminal are used for wiring and the maintenance of experimental equipment of using in the burning simulation district, and infrared camera is used for observing the internal environment in burning simulation district, and the explosion-proof lamp is used for providing the illumination for burning simulation district.
The second aspect of the present invention relates to a power cable combustion test method using the power cable combustion test apparatus of the first aspect of the present invention, including the steps of: step 1, supplying power and gas to a combustion simulation area by a water, electricity and gas supply area, and starting a flame spray gun in the combustion simulation area to simulate a fire; step 2, performing fire inversion by using a fire disaster, and monitoring the fire in the combustion simulation area based on a sensor in the fire inversion process to obtain fire change data in the combustion simulation area, action conditions and action effects of fire-fighting products for tests; step 3, after the inversion of the fire is finished, opening the atomizing nozzle and the gas fire extinguishing nozzle to cool, remove dust and extinguish fire in the tunnel combustion simulation area or the trench combustion simulation area; and 4, starting the tail gas treatment device after the fire is extinguished so as to purify and remove the waste gas generated in the combustion simulation experiment process.
Compared with the prior art, the power cable combustion test device has the advantages that the simulation environment of cable tunnel fire can be realized, the cable fire-proof combustion characteristics can be evaluated, and a corresponding data monitoring and analyzing system can be established. Based on the device and the method, the fire condition of the cable channel can be inverted, the verification test of the fireproof product can be carried out, and meanwhile, the small-size fireproof performance detection capability can be conveniently integrated to realize the detection of the fireproof product of the cable.
The beneficial effects of the invention also include:
1. the method is beneficial to controlling the fireproof performance of the fireproof product for network access, so that the energy efficiency of fireproof engineering is improved, and instructive opinions are provided for the specification of electric fireproof arrangement measures based on detection results;
2. by constructing a special power cable fire prevention platform and simulating an environment, the key performance of a fire-fighting product can be better verified, so that support is provided for high-quality reliable operation of a power cable;
3. based on the construction standard of the power cable channel, the fire disaster environment of the cable tunnel and the cable trench is accurately simulated, the power supply reliability of the power transmission line is guaranteed, and good social and economic benefits are achieved;
4. based on the research work of the fire in the cable channel, the invention can establish an evaluation system of tunnel safety, monitor the combustion test process of the power cable in real time, record test data, analyze and display the data and provide the truest and most reliable data for the fire research in the cable channel and the establishment of a cable tunnel fire model.
5. The functional areas are manufactured in a reinforced container mode, the relative positions of the functional areas can be flexibly adjusted, and flexible arrangement according to the appearance and the basic condition of a layout field is facilitated.
6. The invention can repeatedly carry out the cable combustion test in the cable channel, and avoids the damage to the channel caused by the cable combustion test in the actual cable channel.
Compared with the prior application of the applicant of the application, namely the previous generation product, the application is closer to the scene of a real cable channel from the aspect of structure, and can repeat the inversion of a combustion test, so that the combustion process of a power cable can be accurately simulated, and comprehensive and accurate fire analysis of a cable tunnel is provided; meanwhile, the device and the matched test method are provided, and the performance is upgraded and updated in a leap manner.
Drawings
FIG. 1 is a schematic view of a device structure partition in a power cable combustion test device according to the present invention;
FIG. 2 is a schematic structural diagram of a tunnel combustion simulation container in the power cable combustion test device according to the present invention;
fig. 3 is a schematic method flow diagram of a power cable combustion test method according to the present invention.
Reference numerals:
01-water-gas supply area,
02-a tunnel combustion simulation zone, wherein,
03-the channel combustion simulation zone(s),
04-a tail gas treatment area, wherein,
05-a water-electricity-gas pipeline,
1-a shell body, wherein the shell body is provided with a plurality of through holes,
2-an atomizing spray head, wherein,
31-an electric air valve, wherein the air valve is arranged on the air valve,
32-an air-exhausting device, wherein,
4-a flame spray gun, wherein the flame spray gun is arranged on the upper portion of the frame,
5-a sensor.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
The invention provides a power cable combustion test device in a first aspect. As shown in figure 1, the power cable combustion test device comprises a water, electricity and gas supply area 01, a tunnel combustion simulation area 02, a channel combustion simulation area 03 and a tail gas treatment area 04. Wherein, the shells of the water, electricity and gas supply area 01, the tunnel combustion simulation area 02, the channel combustion simulation area 03 and the tail gas treatment area 04 are all made of reinforced containers; the water, electricity and gas supply area 01 is respectively connected with one end of the tunnel combustion simulation area 02 and one end of the channel combustion simulation area 03 through pipelines, and supplies water, electricity and gas required in the simulation test to the tunnel combustion simulation area 02 and the channel combustion simulation area 03; the tunnel combustion simulation area 02 and the channel combustion simulation area 03 are used for simulating a power cable combustion test, and as shown in fig. 2, a cable support, a test cable, a flame spray gun 4, an atomizing nozzle 2, a gas fire extinguishing nozzle and a sensor 5 are arranged inside the tunnel combustion simulation area and the channel combustion simulation area, and an air supply and exhaust device, a water and electricity pipeline 05 interface and a drainage and sewage discharge port are arranged on a shell 1 of the tunnel combustion simulation area; the tail gas treatment area 04 is respectively connected with the other ends of the tunnel combustion simulation area 02 and the channel combustion simulation area 03 through pipelines, and is used for treating test waste gas generated by the tunnel combustion simulation area 02 and the channel combustion simulation area 03.
In particular, the various devices used in the combustion test may be placed in different zones depending on the particular function of the combustion test. The combustion simulation area is mainly used for simulating a combustion environment, the water, electricity and gas supply area 01 is used for providing water, electricity and gas for combustion, and the tail gas treatment area 04 is used for purifying and removing wastes after combustion.
According to different test requirements, other required areas can be added to the test device, such as a cable fireproof product physical and chemical detection area, a cable combustion performance detection area, a monitoring area and the like. All the areas are connected with each other through pre-buried stainless steel seamless steel pipes. For example, in the embodiment of the invention, a stainless steel seamless pipe with a phi 25SUS316 model can be embedded, one end of the pipeline is respectively connected with a reserved air inlet on a container shell of a tunnel and a channel combustion simulation area through a tee joint, and the other end of the pipeline is connected with a reserved air outlet on the container shell of a water-electricity-gas supply area.
Particularly, in order to realize the division of different areas and the external structure of different areas, the design transformation can be carried out on a standard reinforced container, meanwhile, a test site of the container is provided, and then the hoisting, leveling and installation are carried out on the site where the container is arranged.
Preferably, the shell 1 of the tunnel combustion simulation area 02 is formed by transforming 40-size high-cabinet containers, the shell 1 of the channel combustion simulation area 03 is formed by transforming 20-size high-cabinet containers, and the tunnel combustion simulation area 02 and the channel combustion simulation area 03 are sequentially arranged end to end by adopting a plurality of containers to meet the length requirement of the combustion simulation area.
Preferably, the inner wall of the shell 1 in the tunnel combustion simulation area is sequentially provided with a heat insulation material layer, a fire-resistant layer and a heat insulation layer; a fire-resistant layer and a heat-insulating layer are sequentially arranged on the inner wall of a cable trench of the trench combustion simulation area; wherein, insulating material layer, flame retardant coating, insulating layer are used for insulating the heat that the experiment produced.
In one embodiment of the invention, the tunnel simulation test area is formed by transforming 40-size cabinet reinforced containers (the outer dimensions are 12 m in length, 2.4 m in width and 2.5 m in height), and the containers are connected end to form a straight line segment. In one embodiment of the invention, a 10mm heat insulation material layer is adopted on the inner side of the box body, the wall of a refractory brick is taken as a fire-resistant layer, and a high-temperature resistant ceramic lining material with the thickness not less than 100mm is taken as a heat insulation layer; the local fire temperature in the tunnel can reach 1250 ℃, the continuous fire can be borne for more than 2 hours, the tunnel is not damaged, and the temperature of the shell of the box body is normal temperature.
In one embodiment of the invention, the channel simulation test area is formed by splicing and transforming 3 20-size container cabinets (the outer dimensions are 15 meters long, 2.4 meters wide and 2.5 meters high) in a straight line section arrangement.
In addition, an air supply ignition system, a water mist fire extinguishing and cooling system, a gas fire extinguishing system, a tail gas treatment system and a power distribution system are arranged in the device. Specifically, the air supply ignition system is used for carrying out program-controlled ignition on a cable for testing. A water mist fire extinguishing and cooling system is used for extinguishing and cooling a fire situation combustion simulation area of a cable such as a tunnel and a channel. The gas fire extinguishing system is used for carrying out fire fighting and extinguishing on the tunnel channel cable fire condition combustion simulation area. The tail gas treatment system is used for recovering and purifying the flue gas of each combustion simulation area and discharging the flue gas after reaching standards. The power distribution system can provide equipment power for each system.
Preferably, the cable support is arranged on the side wall of the cable trench in the tunnel combustion simulation area and the trench combustion simulation area and used for placing the test cable; the flame spray gun 4 is arranged below the cable support and used for igniting the cable.
It will be appreciated that the gas supply ignition system may be a system consisting of a propane cylinder, burner, igniter. The propane gas cylinder is connected with the burner, and the igniter controls the opening and closing of the burner. The burners are arranged in the tunnel combustion simulation area and the channel combustion simulation area, and the propane gas cylinder can be arranged in the water, electricity and gas supply area.
The gas supply ignition system can also comprise an angle valve and a main valve, wherein the angle valve controls the opening and closing of a single propane gas cylinder, and the main valve controls the opening and closing of a plurality of propane gas cylinders after confluence. The propane gas output from the propane cylinder may be passed through a pressure relief valve. The pressure reducing valve can adjust the output pressure of the propane gas, namely, the gas supply speed of the propane gas in the pipeline is changed, so that the power of the fire source is adjusted. The gas flowmeter can be connected with a computer system to display gas flow data in real time so as to read the power of the fire source. Therefore, the gas supply ignition system generates fire source power based on the data of the gas flow meter, and adjusts the gas supply speed of the propane gas based on the fire source power. In addition, the flashback arrestor can effectively prevent gas from backflowing along the gas transmission pipeline. The gas transmission pipeline can be composed of a stainless steel pipe and a fireproof metal hose, and the equipment is connected to a burner in the combustion simulation area through the fireproof metal hose. According to the size of the tunnel support, the burner can be a belt-type propane gas blast lamp, the power is more than 400kw, the flame temperature can reach more than 1000 ℃, and the maximum flame height can reach 1.5 m. Meanwhile, a movable base and a support can be designed for the burner, wherein the base and the support are detachable, so that the burner can enter the groove or be arranged inside the tunnel. The burner has a height adjustable support so that the burner can be placed in different areas depending on the position of the cable. The combustor can be further provided with a wireless receiving device, and wireless repeaters are arranged in the tunnel combustion simulation area and the trench combustion simulation area. The wireless igniter controls the on and off of the burner through the wireless repeater and the wireless receiving device. The igniter of the burner can adopt a wired mode and a wireless mode to ensure the reliability of ignition. If a wired igniter is used, it is wired and coated with a fire-retardant material at its portion near the fire source. If the wireless igniter is adopted, a wireless repeater is additionally arranged in the tunnel, and the burner is controlled in a wireless communication mode. The propane burner can control air inflow, power is controllable, and combustion is stable.
By adopting the gas supply ignition system, the size and the position of flame can be accurately controlled and adjusted through the system, and various tunnel fire situations with large and small scales can be simulated. In addition, flame control datamation can be realized, and simulation, repetition and stable experiment foundation can be realized by utilizing programmable curve control. In addition, the propane burner has the advantages that the flame height of the burner is low, the combustion is sufficient, the product is water and carbon dioxide, the parameters such as the smoke concentration and the like of the cable body combustion cannot be influenced, and the propane burner is suitable for igniting the cable body.
Preferably, the atomizing nozzle and the gas fire extinguishing nozzle are arranged on the top plates of the tunnel combustion simulation area and the channel combustion simulation area and used for cooling, dedusting and extinguishing fire for the combustion test area. The atomizing nozzles and the gas fire extinguishing nozzles are connected with pipelines and receive corresponding supply from water, electricity and gas supply areas through water, electricity and gas pipeline 05 interfaces arranged on the shell 1.
The water mist fire extinguishing and cooling system comprises a water filtering device, a high-pressure host, a high-pressure pipeline, an electromagnetic valve and an atomizing nozzle. The high-pressure host is connected with the atomizing nozzle sequentially through the water filtering device, the high-pressure pipeline and the electromagnetic valve, and the electromagnetic valve controls the opening and closing of the atomizing nozzle. And the atomizing spray heads are arranged in the tunnel combustion simulation area and the channel combustion simulation area. The high-pressure host, the water filtering device, the high-pressure pipeline and the electromagnetic valve are arranged in the water, electricity and gas supply area. The water mist fire extinguishing and cooling system can comprise some water supply equipment, such as a long-acting water filter, a four-stage water treatment device and the like. The atomizing spray head and the pipe network can be arranged on the inner sides of the channel and the tunnel container top plate, galvanized steel pipes are laid along the inner sides of the container bodies, and the galvanized steel pipes are connected with water inlets reserved on the container bodies through the galvanized steel pipes. In the embodiment of the invention, 54 atomizing nozzles can be supplied with water through one host. The water mist fire extinguishing and cooling system can be connected with a computer system, and corresponding atomizing nozzles are opened through the opening or closing instruction of the electromagnetic valve, so that fire extinguishing and cooling are realized.
In the present invention, the gas fire extinguishing system may include a heptafluoropropane fire extinguishing bottle group, a fire extinguishing controller, and an emergency button. Wherein, the heptafluoropropane fire extinguishing bottle group and the emergency button are arranged in the tunnel combustion simulation area and the channel combustion simulation area. The heptafluoropropane fire extinguishing bottle group starts and extinguishes fire based on the prompt of the fire extinguishing controller. The emergency button is used for controlling the heptafluoropropane fire extinguishing bottle group in the combustion simulation area. The invention relates to a cabinet type heptafluoropropane fire extinguisher, which comprises a fire extinguishing agent bottle group, a pipeline, a spray head, a signal feedback part, a detection part, a driving part, a cabinet body and the like, and a gas fire extinguishing system is formed by the cabinet type heptafluoropropane fire extinguisher, a fire alarm and a fire extinguishing controller.
Preferably, the sensor 5 comprises a fire detection sensor for detecting smoke and temperature rise in the test area and activating the gas fire extinguishing nozzle to extinguish fire based on the detection result.
It can be understood that the fire detection sensor transmits a fire signal to the fire extinguishing controller to send out a fire alarm signal, and after the fire alarm signal is artificially confirmed, the fire extinguishing controller sends out a linkage signal to start the heptafluoropropane fire extinguishing bottle group.
Specifically, in the manual state, the fire extinguishing controller only sends out a fire alarm signal when a fire occurs, but does not send out a linkage signal and a starting signal. The person on duty shall arrive at the scene immediately, after confirming the fire, press the "emergency start" button on the gas fire-extinguishing controller panel or on the scene and start the fire-extinguishing system immediately, send the linkage signal (close the air conditioner, send exhaust device and fire prevention valve, prevent fire door, fire prevention rolling screen, etc.) at the same time. Before the gas fire-extinguishing controller sends out a starting signal, an emergency stop button on a panel of the gas fire-extinguishing controller or on the spot is pressed, and the fire-extinguishing device cannot be started.
Preferably, the sensor 5 also includes an environmental monitoring sensor for monitoring the composition and concentration of the gas in the simulated test zone.
Preferably, the air supply and exhaust device is used for supplying the test gas in the water and electricity gas supply area to the combustion test area and supplying the combustion waste gas in the combustion test area to the tail gas treatment area. Wherein, the air supply device is communicated with the water, electricity and gas supply area, and the exhaust device 32 is communicated with the tail gas treatment area.
Specifically, the air supply and exhaust device comprises an electric air valve 31 for controlling the test gas in the tunnel combustion simulation area and the channel combustion simulation area to be exhausted to the tail gas treatment area. Specifically, the air supply device may be used to supplement the combustion simulation zone with oxygen required for combustion of the gas. The exhaust device can be used for exhausting the combustion tail gas to the tail gas treatment area from the combustion simulation area after the combustion test is finished.
In addition, an oxygen transmitter, a carbon monoxide transmitter, a carbon dioxide transmitter and a hydrogen chloride transmitter in the water and electricity supply area transmit test gas to a flame spray gun in the combustion simulation area so as to simulate a fire. These gas transmitters, as described above, can provide the appropriate gas composition and concentration for combustion. The tail gas treatment system is arranged in the tail gas treatment area and comprises a filter cartridge dust remover, a plasma purifier, a photocatalytic purifier, an activated carbon adsorption box, a centrifugal fan and a chimney. The tunnel combustion simulation area and the channel combustion simulation area respectively discharge waste gas to the tail gas treatment area through pipelines, and the filter cartridge dust remover, the plasma purifier, the photocatalytic purifier, the activated carbon adsorption tank, the centrifugal fan and the chimney are sequentially connected to purify the waste gas and then discharge the purified waste gas.
Specifically, the system mainly purifies the gases such as HCL, CO2, CO, SO2, and the like generated in the combustion test. The filter drum dust remover can discharge filtered and purified air flow from the center of the filter drum, the plasma purifier, the photocatalytic purifier and the activated carbon adsorption box sequentially purify the air flow, and the purified air flow is discharged through the centrifugal fan and the chimney. In addition, the system can be automatically controlled and programmable and can operate in different modes, such as an extremely-high speed mode, a common mode, an ultra-clean mode and the like, an interface is reserved, and linkage and centralized processing and control are carried out with other units. Air supply and air exhaust are controlled by a control system in a linkage manner, and flue gas cleaning of a tunnel and a channel simulation combustion test area and a combustion performance detection area can be completed quickly. The ventilation of the tunnel, the channel and the combustion performance detection test area can be controlled according to different simulation scene requirements.
Preferably, still be provided with branch control box and block terminal, infrared camera and explosion-proof lamp in the burning simulation district. Wherein, branch control box and block terminal are used for wiring and the maintenance of experimental equipment of using in the burning simulation district, infrared camera is used for observing the internal environment in burning simulation district, and the explosion-proof lamp is used for providing the illumination for burning simulation district.
As shown in fig. 3, a second aspect of the present invention relates to a power cable burning test method, which includes steps 1 to 3.
Compared with the prior art, the power cable combustion test device has the advantages that the simulation environment of cable tunnel fire can be realized, the cable fire-proof combustion characteristics can be evaluated, and a corresponding data monitoring and analyzing system can be established. Based on the device and the method, the fire condition of the cable channel can be inverted, the verification test of the fireproof product can be carried out, and meanwhile, the small-size fireproof performance detection capability can be conveniently integrated to realize the detection of the fireproof product of the cable.
The beneficial effects of the invention also include:
1. the method is beneficial to controlling the fireproof performance of the fireproof product for network access, so that the energy efficiency of fireproof engineering is improved, and instructive opinions are provided for the specification of electric fireproof arrangement measures based on detection results;
2. by constructing a special power cable fire prevention platform and simulating an environment, the key performance of a fire-fighting product can be better verified, so that support is provided for high-quality reliable operation of a power cable;
3. based on the construction standard of the power cable channel, the fire disaster environment of the cable tunnel and the cable trench is accurately simulated, the power supply reliability of the power transmission line is guaranteed, and good social and economic benefits are achieved;
4. based on the research work of the fire in the cable channel, the invention can establish an evaluation system of tunnel safety, monitor the combustion test process of the power cable in real time, record test data, analyze and display the data and provide the truest and most reliable data for the fire research in the cable channel and the establishment of a cable tunnel fire model.
5. The functional areas are manufactured in a reinforced container mode, the relative positions of the functional areas can be flexibly adjusted, and flexible arrangement according to the appearance and the basic condition of a layout field is facilitated.
6. The invention can repeatedly carry out the cable combustion test in the cable channel, and avoids the damage to the channel caused by the cable combustion test in the actual cable channel.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (11)
1. The utility model provides a power cable combustion test device, includes that water, electricity and gas supply district, tunnel burning simulation district, channel burning simulation district and tail gas treatment district, its characterized in that:
the shells of the water, electricity and gas supply area, the tunnel combustion simulation area, the channel combustion simulation area and the tail gas treatment area are all made of reinforced containers with set sizes; and the number of the first and second electrodes,
the water, electricity and gas supply area is respectively connected with one end of the tunnel combustion simulation area and one end of the channel combustion simulation area through pipelines and supplies water, electricity and gas required in a simulation test to the tunnel combustion simulation area and the channel combustion simulation area;
the tunnel combustion simulation area and the channel combustion simulation area are used for simulating a power cable combustion test, a cable support, a test cable, a flame spray gun, an atomizing nozzle, a gas fire extinguishing nozzle and a sensor are arranged in the tunnel combustion simulation area and the channel combustion simulation area, and an air supply and exhaust device, a water and electricity pipeline interface and a drainage and sewage outlet are arranged on a shell of the tunnel combustion simulation area and the channel combustion simulation area;
the tail gas treatment area is respectively connected with the other ends of the tunnel combustion simulation area and the channel combustion simulation area through pipelines, and is used for treating test waste gas generated by the tunnel combustion simulation area and the channel combustion simulation area.
2. A power cable burn test apparatus as claimed in claim 1, wherein:
the casing in tunnel burning analog region is reformed transform by 40 chi high cabinet containers and is formed, the casing in channel burning analog region is reformed transform by 20 chi high cabinet containers and is formed, tunnel burning analog region with channel burning analog region adopts multisection container end to arrange in proper order in order to satisfy the length requirement in burning analog region.
3. A power cable burn test apparatus as claimed in claim 2, wherein:
the inside in channel analogue test district is provided with the cable pit, the cable pit top has swing joint's apron, cable support, experimental cable and combustor are provided with to the cable pit inside.
4. A power cable burn test apparatus as claimed in claim 3, wherein:
the inner wall of the shell of the tunnel combustion simulation area is sequentially provided with a heat insulation material layer, a fire-resistant layer and a heat insulation layer;
a fire-resistant layer and a heat-insulating layer are sequentially arranged on the inner wall of the cable trench of the trench combustion simulation area;
the heat insulation material layer, the fire-resistant layer and the heat insulation layer are used for isolating heat generated in the test.
5. A power cable burn test apparatus as claimed in claim 4, wherein:
the cable support is arranged on the side walls of the cable trench in the tunnel combustion simulation area and the trench combustion simulation area and used for placing a cable for a test;
the flame spray gun is arranged below the cable support and used for igniting a cable.
6. A power cable burn test apparatus as claimed in claim 1, wherein:
the atomization nozzle and the gas fire extinguishing nozzle are arranged on the top plates of the tunnel combustion simulation area and the channel combustion simulation area and are used for cooling, dedusting and extinguishing fire for the combustion test area;
the atomizing nozzle and the gas fire extinguishing nozzle are connected with a pipeline and receive corresponding supply from the water, electricity and gas supply area through a water, electricity and gas pipeline interface arranged on the shell.
7. A power cable burn test apparatus as claimed in claim 6, wherein:
the sensor comprises a fire detection sensor for detecting smoke and temperature rise in the test area and starting the gas fire extinguishing nozzle to extinguish fire based on the detection result.
8. A power cable burn test apparatus as claimed in claim 1, wherein:
the sensor also comprises an environment monitoring sensor for monitoring the gas components and the concentration in the simulation test area.
9. A power cable burn test apparatus as claimed in claim 1, wherein:
the air supply and exhaust device is used for supplying test gas in the water and electricity gas supply area to the combustion test area and sending combustion waste gas in the combustion test area to the tail gas treatment area;
the air supply device in the air supply and exhaust device is communicated with the water, electricity and gas supply area, and the exhaust device in the air supply and exhaust device is communicated with the tail gas treatment area.
10. A power cable burn test apparatus as claimed in claim 1, wherein:
a sub-control box, a distribution box, an infrared camera and an explosion-proof lamp are also arranged in the combustion simulation area;
wherein, branch control box and block terminal are used for wiring and the maintenance of experimental equipment of using in the burning simulation district, infrared camera is used for observing the internal environment in burning simulation district, the explosion-proof lamp is used for doing the burning simulation district provides the illumination.
11. A power cable burn test method as claimed in one of the power cable burn test apparatuses of claims 1-10, comprising the steps of:
step 1, the water, electricity and gas supply area supplies power and gas to the combustion simulation area, and the flame spray gun in the combustion simulation area is started to simulate a fire;
step 2, performing fire inversion by using the fire, and monitoring the fire in the combustion simulation area based on the sensor in the fire inversion process to obtain fire change data in the combustion simulation area, action conditions and action effects of fire-fighting products for tests;
step 3, after the fire inversion in the step 2 is finished, opening an atomizing nozzle and a gas fire extinguishing nozzle to cool, remove dust and extinguish fire in the tunnel combustion simulation area or the trench combustion simulation area;
and 4, starting the tail gas treatment device after the fire is extinguished so as to purify and eliminate the waste gas generated in the combustion simulation experiment process.
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