CN-119479418-B - Pool fire simulator based on gas true fire simulation technology and simulation method

Abstract

The invention discloses a pool fire simulator based on a gas true fire simulation technology and a simulation method, comprising a gas cylinder group, a gas transmission pipeline, a simulated oil pool, a rectifying sand layer and a pulse electronic igniter, wherein the rectifying sand layer is arranged in the simulated oil pool, a plurality of gas guide channels are formed in the rectifying sand layer, the gas cylinder group is connected with the input end of the gas guide channels through the gas transmission pipeline, a controllable gas electronic valve is arranged on the gas transmission pipeline, the pulse electronic igniter is further arranged on the outer side of the simulated oil pool, the ignition end of the pulse electronic igniter is positioned above the output end of the gas guide channels, and the rectifying sand layer is made of steel sand. According to the invention, based on gas true fire simulation and using gas as a gas source, compared with a direct combustion transformer, the gas-fired transformer has small smoke quantity, the system is more environment-friendly, and meanwhile, through the arrangement of the rectifying sand layer, the rapid temperature rise of the transformer oil fire can be simulated to the greatest extent, and the combustion characteristics of the actual transformer oil fire are reflected.

Inventors

• WANG RUOMIN
• Pu Danyao
• LIU RUI
• ZHANG JIAQING
• GUO YI
• XU PENGCHENG
• CHEN HUAN
• YANG YANG
• WANG YAN
• CHEN XINYAN

Assignees

• 安徽新力电业科技有限责任公司
• 国网安徽省电力有限公司电力科学研究院

Dates

Publication Date

20260508

Application Date

20241128

Claims (9)

1. 1. The pool fire simulator based on the gas true fire simulation technology is characterized by comprising a gas cylinder group, a gas transmission pipeline, a simulated oil pool, a rectifying sand layer and a pulse electronic igniter, wherein the rectifying sand layer is arranged in the simulated oil pool, a plurality of gas guide channels are formed in the rectifying sand layer, the gas cylinder group is connected with the input end of the gas guide channels through the gas transmission pipeline, a controllable gas electronic valve is arranged on the gas transmission pipeline, the pulse electronic igniter is further arranged on the outer side of the simulated oil pool, the ignition end of the pulse electronic igniter is positioned above the output end of the gas guide channels, the rectifying sand layer is made of steel sand, and a protective net for limiting the rectifying sand layer is further arranged in the simulated oil pool.
2. 2. The pool fire simulator based on the gas true fire simulation technology according to claim 1, further comprising a controller, wherein the controller is electrically connected or in communication with the pulse electronic igniter and the controllable gas electronic valve.
3. 3. The pool fire simulator based on the gas true fire simulation technology according to claim 1, wherein the simulated oil pool is of a box body structure with an open top and a closed circumference and bottom, a rectifying groove is formed in the circumference and bottom inner wall of the simulated oil pool, and the rectifying sand layer is arranged in the rectifying groove.
4. 4. The pool fire simulator based on the gas true fire simulation technology according to claim 1, wherein the gas transmission pipeline comprises a gas transmission main pipe and gas transmission branch pipes, the gas bottle group is connected with a plurality of gas transmission branch pipes through the gas transmission main pipe, and the plurality of gas transmission branch pipes are connected with the input end of the gas guide channel.
5. 5. The pool fire simulator based on the gas true fire simulation technology according to claim 1, wherein the diameter of the steel sand is 3mm, and the thickness of the rectifying sand layer is more than or equal to 250mm.
6. 6. The pool fire simulator based on the gas true fire simulation technology according to claim 2, wherein the controller is electrically connected with the pulse electronic igniter through an igniter control line, and the controller is electrically connected with the controllable gas electronic valve through a gas electromagnetic valve control line.
7. 7. The pool fire simulator based on the gas true fire simulation technology according to claim 4, wherein one end of the gas transmission branch pipe connected with the simulated oil pool is positioned at the bottom of the simulated oil pool.
8. 8. The pool fire simulator based on the gas true fire simulation technology according to claim 7, wherein a plurality of the gas transmission branch pipes are uniformly distributed along the bottom of the simulated oil pool.
9. 9. A method of simulating a pool fire simulator based on a gas true fire simulation technique as claimed in any one of claims 1 to 8, comprising the steps of: before the test, a pulse electronic igniter is opened, then a controllable fuel gas electronic valve is opened, the flow rate is regulated, the temperature of flame is tested through a thermocouple, whether the form of the flame is similar to that of real transformer oil fire or not is judged through a camera and naked eyes, and the corresponding flow rate is recorded; Opening a pulse electronic igniter during the test, then opening a controllable gas electronic valve, setting the gas flow as the flow obtained by debugging before the test, and removing the pulse electronic igniter after ignition; and after the test, closing the controllable fuel gas electronic valve.

Description

Pool fire simulator based on gas true fire simulation technology and simulation method Technical Field The invention relates to the technical field of pool fire simulators, in particular to a pool fire simulator based on a gas true fire simulation technology and a simulation method. Background While the fire-fighting system is well in the premise of realizing the fire-extinguishing capability, some existing fire accident cases show that the branch pipes and the spray heads of the water spray fire-extinguishing system are easily damaged in fire, so that the pressure of a pipe network is lost to reduce or lose the fire-extinguishing capability. In the case of fire accident, the damage of the branch pipe or the spray head of the water spray fire extinguishing system is considered to be caused by the explosion of the converter transformer sleeve, and in the full-size true water spray fire extinguishing test of the national power grid company organization, the condition that the branch pipe and the spray head of the water spray fire extinguishing system are damaged by flame combustion to cause the pressure loss of a pipeline to extinguish the fire is found. This means that the water spray fire suppression system is expected to function in practice, taking into account not only the antiknock capability of the system, but also the burn resistance of the water spray fire suppression system. At present, no standard is specially used for dry burning test of pipelines and spray heads of an ultrahigh-voltage converter transformer water spray fire extinguishing system. The closest standard requirements are the dry burning requirements and test methods of groove type connecting piece (clamp) sealing rings and nonmetallic flange gaskets in a protection area in GB50219-2014 of technical Specification of Water spray fire extinguishing System. The technical specification of the water spray fire extinguishing system GB50219-2014, item 4.06, states that the sealing ring of the groove type connecting piece (clamp) in the protection area and the nonmetallic flange gasket should pass the dry burning test specified in the appendix A. The corresponding specification indicates that before the water spraying system sprays water, the fire disaster can cause dry burning to dry pipelines of the system, if the sealing of the connecting piece cannot bear the dry burning, a large amount of water leakage can be caused, and the cooling effect of the system is influenced, so that the requirement of dry burning resistance is provided for the connecting piece of the water spraying pipeline. The technical specification of water spray fire extinguishing systems GB50219-2014 annex A prescribes a dry burning resistance test method. The requirements for dry burning resistance specified by the method are related to Germany VdS-6 en:2004-01 pipeline connector and GB5135.11-2006 automatic sprinkler system 11 part: grooved pipe connector. When the system is used for liquefied hydrocarbon storage tanks, there is a greater risk of using liquefied hydrocarbon injection fires for testing, and therefore, dry burning tests using gasoline fires having substantially similar heating values are recommended. For water spray fire extinguishing systems arranged in other places, the heating degree of the pipe fitting during dry burning is smaller than that of a liquefied hydrocarbon place, so that a methanol fire can be adopted for testing. The area of the test combustion disc is required to be not less than 0.08m 2, the distance between the upper edge of the combustion disc and the connecting piece is preferably 200mm, and the dry burning time is not required to be less than 5min. And after the dry burning is finished, watering and cooling the burnt joint on the assembly, wherein the cooling time is not less than 3min, and flushing water and pressurizing the assembly to the working pressure after the cooling is finished, so that jet-type leakage does not occur at the pipeline joint. Although the technical Specification of water spray fire extinguishing systems GB50219-2014 proposes dry burning requirements and test methods for groove type connector (clamp) sealing rings and nonmetallic flange gaskets in a protection area, the type and minimum size of a fire source (0.08 m 2, which is equivalent to a small oil pan of 0.2m multiplied by 0.4m, and the maximum power of the fire source is 44kW according to methanol fire) are specified, the specific temperature requirements are not precisely quantified, the fire-resistant test contents such as a main pipe, a branch pipe and a spray nozzle are not involved, and the pipe fittings for places other than liquefied hydrocarbon storage tanks are considered to be heated less than liquefied hydrocarbon places in dry burning, so that the methanol fire is recommended to be used as a test fire source. The converter transformer fire of the converter station is generally transformer oil fire, and related researches show that the conver