CN112121341A

CN112121341A - Method and device for calculating parameters of fire extinguishing system, storage medium and equipment

Info

Publication number: CN112121341A
Application number: CN202011019404.7A
Authority: CN
Inventors: 李飞; 王宇豪; 姜乃文; 张尧; 周兴才
Original assignee: Zephyr Intelligent System Shanghai Co Ltd
Current assignee: Zephyr Intelligent System Shanghai Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2020-12-25
Anticipated expiration: 2040-09-24
Also published as: CN112121341B

Abstract

The application relates to a method, a device, a storage medium and equipment for calculating parameters of a fire extinguishing system, and the method for calculating the parameters of the fire extinguishing system is used for the parameters of the fire extinguishing system and comprises the following steps: obtaining parameters of the thermosensitive wire according to the condition that the transfer powder is stably ignited; obtaining parameters of the transfer powder according to the stable ignition condition of the spontaneous ignition powder; obtaining parameters of the spontaneous combustion gunpowder according to the condition that the gas generating agent is stably ignited; and obtaining the parameters of the gas generating agent according to the condition that the piston is pushed to the bottom of the cylinder body. The parameter calculation method, the storage medium and the computer equipment of the fire extinguishing system are used for calculating the parameters of all the components in the fire extinguishing system, and the maximum requirement of the superior reaction is reversely deduced through the maximum requirement of the inferior reaction when the parameters of all the components are calculated, so that the parameters of all the components of the fire extinguishing system can be finally obtained, and the parameters can meet the requirement of stable and reliable triggering of the inferior.

Description

Method and device for calculating parameters of fire extinguishing system, storage medium and equipment

Technical Field

The application relates to the technical field of fire extinguishing systems, in particular to a method, a device, a storage medium and equipment for calculating parameters of a fire extinguishing system.

Background

At present, lithium batteries are applied more and more, for example, in electric automobiles, so that the lithium batteries can extinguish fire in time after a fault of the lithium batteries is on fire, and the lithium batteries are particularly important for guaranteeing the safety of vehicles and people.

In the traditional technology, a controller generally judges whether a fire disaster occurs or not after receiving a fire disaster detection signal given by a fire disaster detector, and outputs current to an electric ignition firewood after the fire disaster occurs, and the electric ignition firewood excites a gas generator to generate gas to push a piston to spray a fire extinguishing agent so as to achieve the purpose of extinguishing the fire. However, this method requires a fire detector, a controller, a power supply, and other components, is complicated in structure, requires regular maintenance, and is expensive.

Therefore, in order to improve the defect of complex structure of the fire extinguishing system, a piston type fire extinguishing system is provided, wherein a heat-sensitive wire, a fire transfer agent, a heat-conducting membrane, a spontaneous combustion agent, a gas production agent and a liquid fire extinguishing agent are arranged in the piston type fire extinguishing system, when the environment temperature is higher than the excitation temperature of the heat-sensitive wire, the heat-sensitive wire is spontaneously combusted and ignites the fire transfer agent, the generated temperature is conducted to the spontaneous combustion agent through the heat-conducting membrane to enable the spontaneous combustion agent to be natural, so that the gas production agent is ignited, and a large amount of gas is generated after the gas production agent is combusted to.

Then, no specific calculation method is available for defining parameters of each component of the piston type fire extinguishing system.

Disclosure of Invention

In view of the above, it is necessary to provide a fire extinguishing system and a method, an apparatus, a storage medium and a device for calculating parameters thereof.

A method of calculating parameters of a fire suppression system for parameters of a fire suppression system, the fire suppression system comprising:

the fire transfer chamber is internally provided with a thermosensitive wire and a fire transfer powder; one part of the heat-sensitive wire is positioned outside the fire transfer chamber, the other part of the heat-sensitive wire is positioned in the middle of the fire transfer powder and is fixed at the bottom of the fire transfer chamber, and the heat-sensitive wire is self-ignited when the ambient temperature is higher than the excitation temperature of the heat-sensitive wire;

the combustion chamber is connected with the fire transfer chamber, and a heat conduction membrane, spontaneous combustion gunpowder and gas production medicament are sequentially arranged in the combustion chamber in a contact manner; and

the cylinder body is connected with the combustion chamber, a piston is arranged in the cylinder body, a release valve is arranged at the bottom of the cylinder body, and a liquid fire extinguishing agent is also arranged between the piston and the release valve; a gap is formed between the cylinder body and the combustion chamber so that gas generated after the gas generating agent is combusted enters the cylinder body to push the piston;

the method comprises the following steps:

obtaining parameters of the thermosensitive wire according to the condition that the transfer powder is stably ignited;

obtaining parameters of the transfer powder according to the stable ignition condition of the spontaneous ignition powder;

obtaining parameters of the spontaneous combustion gunpowder according to the condition that the gas generating agent is stably ignited;

and obtaining the parameters of the gas generating agent according to the condition that the piston is pushed to the bottom of the cylinder body.

In one embodiment, the obtaining the parameter of the heat-sensitive wire according to the condition that the transfer charge is stably ignited comprises:

obtaining the quantity of heat delta Q required by unit volume of the transfer charge in contact with the heat-sensitive wire to be ignited₁₃；

The quantity of heat Δ Q required for ignition according to the unit volume of the transfer charge in contact with the heat-sensitive wire₁₃Obtaining the spontaneous combustion temperature T of the transfer charge reaching the transfer charge₁₃Time Δ t used₁₃；

According to the burning time t of the thermosensitive wire in the combustion chamber_1-2>The transfer charge reaches the spontaneous combustion temperature T of the transfer charge₁₃Time Δ t used₁₃Determining the length S of the heat-sensitive wire inside the heat transfer chamber_1-2；

WhereinThe combustion time t of the heat-sensitive wire in the combustion chamber_1-2>The transfer charge reaches the spontaneous combustion temperature T of the transfer charge₁₃Time Δ t used₁₃The condition for stable ignition of the transfer charge.

In one embodiment, the obtaining the parameter of the transfer charge according to the condition that the self-ignition powder is stably ignited comprises:

obtaining the total heat Q required to be provided by the fire transfer chamber_{Fire transfer chamber}The method comprises the following steps:

obtaining the heat quantity delta Q absorbed by the inner wall of the fire transfer chamber_{Fire transfer chamber wall}；

Obtaining the heat quantity delta Q absorbed by the heat-conducting film₁₂The method comprises the following steps:

obtaining the autoignition temperature T of the autoignition powder in the autoignition powder₁₁At constant temperature heating, and the time delta t required for spontaneous combustion₁₁；

Obtaining the highest temperature T reached by the contact surface of the heat-conducting membrane and the spontaneous combustion gunpowder_12-2Time Δ t used_12-2；

Obtaining the contact surface of the heat-conducting membrane and the spontaneous combustion gunpowder to reach the spontaneous combustion temperature T of the spontaneous combustion gunpowder₁₁Time Δ t used_12-1；

According to the spontaneous combustion temperature T of the spontaneous combustion gunpowder₁₁The above time (. DELTA.t)_12-2-Δt_12-1) Greater than said autoignition temperature T of said autoignition charge₁₁At constant temperature heating, and the time delta t required for spontaneous combustion₁₁Determining the amount of heat absorbed by the thermally conductive diaphragm, Δ Q₁₂Minimum value of (a) Q_12min；

Wherein the autoignition temperature of the autoignition gunpowder is T₁₁Said autoignition powder is at the autoignition temperature T of said autoignition powder₁₁The above time (. DELTA.t)_12-2-Δt_12-1) Greater than said autoignition temperature T of said autoignition charge₁₁At constant temperature heating, and the time delta t required for spontaneous combustion₁₁The condition for stable ignition of the self-ignition gunpowder is adopted;

according to absorption by the inner wall of the fire-transferring chamberHeat quantity of (delta Q)_{Fire transfer chamber wall}And obtaining the heat quantity delta Q absorbed by the heat-conducting membrane₁₂Obtaining the total heat Q required to be provided by the flame transfer chamber_{Fire transfer chamber}；

According to the length S of the thermosensitive wire in the combustion chamber_1-2Obtaining the heat Q generated by the thermosensitive wire_1-1；

According to the total heat Q required to be provided by the fire transfer chamber_{Fire transfer chamber}And the heat Q generated by the heat-sensitive wire_1-1Obtaining the mass M of the transfer charge₁₃And heat quantity q₁₃。

In one embodiment, the obtaining of the parameter of the autoignition powder according to the condition that the gas generating agent is stably ignited comprises:

obtaining the heat Q generated by the combustion of the self-ignition gunpowder₁₁；

Obtaining the combustion time t of the spontaneous combustion gunpowder₁₁；

Obtaining the heat quantity delta Q required by igniting the gas generating agent per unit volume in contact with the spontaneous combustion gunpowder₁₀；

Obtaining the spontaneous combustion temperature T of the gas producing medicament reached by the gas producing medicament per unit volume of the gas producing medicament contacted with the spontaneous combustion gunpowder₁₀Time Δ t used₁₀；

According to the burning time t of the self-ignition gunpowder₁₁>The spontaneous combustion temperature T of the gas generating agent in unit volume in contact with the spontaneous combustion gunpowder₁₀Time Δ t used₁₀Determining the minimum mass M of said autoignition charge_11min；

Wherein the time t of combustion of the self-ignition gunpowder₁₁>The spontaneous combustion temperature T of the gas generating agent in unit volume in contact with the spontaneous combustion gunpowder₁₀Time Δ t used₁₀The gas generating agent is in a stable ignition condition.

In one embodiment, the obtaining of the parameters of the gas generating agent according to the condition that the piston is pushed to the bottom of the cylinder comprises:

obtaining the production of gas required for the piston to move to the bottom of the cylinderThrust force F_{Qi (Qi)}；

Thrust F generated according to the gas required for the piston to move to the bottom of the cylinder_{Qi (Qi)}Resistance f not less than the final position of the piston_PistonDetermining the mass M of said gas-generating agent₁₀And heat value q₁₀；

Wherein the thrust F generated by the gas required for the piston to move to the bottom of the cylinder_{Qi (Qi)}Resistance f not less than the final position of the piston_PistonIs the condition in which the piston is pushed to the bottom of the cylinder.

In one embodiment, the method further comprises the following steps:

acquiring the time t from the beginning to the end of the spraying of the liquid fire extinguishing agent from the release valve_{Spray assembly}The time t from the time the fire extinguishing system is triggered to the end of the ejection of the liquid extinguishing agent from the release valve_{General assembly}And a flow rate Q at the time when the release valve ejects the liquid fire extinguishing agent_{Nozzle with a nozzle body}；

Judging the time t from the beginning to the end of the spraying of the liquid fire extinguishing agent from the release valve_{Spray assembly}The time t from the time the fire extinguishing system is triggered to the end of the ejection of the liquid extinguishing agent from the release valve_{General assembly}And a flow rate Q at the time when the release valve ejects the liquid fire extinguishing agent_{Nozzle with a nozzle body}Whether the quality of the gas production medicament is met or not, if not, the quality M of the gas production medicament is judged to be met₁₀And (6) correcting.

In one embodiment, the time t from the beginning to the end of the ejection of the liquid fire extinguishing agent from the release valve is obtained_{General assembly}The method comprises the following steps:

acquiring the time t of the heat-sensitive wire burning outside the combustion chamber₁；

Obtaining the time t required by the transfer powder to generate the maximum heat_{Combustion chamber}；

Obtaining the time t from the start of combustion of the gas production medicament to the pushing of the piston_10-1；

According to the time t from the beginning to the end of the spraying of the liquid fire extinguishing agent from the release valve_{Spray assembly}Time t of combustion of said heat-sensitive wire outside said combustion chamber₁The time t required for the transfer charge to generate maximum heat_{Combustion chamber}The contact surface of the heat-conducting membrane and the spontaneous combustion gunpowder reaches the highest temperature T_12-2Time Δ t used_12-2The time t from the start of combustion of the gas generating agent to the pushing of the piston_10-1Obtaining the time t from the beginning to the end of the spraying of the liquid fire extinguishing agent from the release valve_{General assembly}。

In one embodiment, the piston is externally wrapped with a piston seal ring, and the method further comprises:

according to the flow Q of the liquid fire extinguishing agent sprayed out by the release valve_{Nozzle with a nozzle body}Obtaining the motion speed V of the piston_Piston；

According to the speed V of movement of the piston_PistonAnd determining the material of the piston sealing ring.

An apparatus for calculating parameters of a fire suppression system, for parameters of a fire suppression system, the fire suppression system comprising:

the device comprises:

the first calculation module is used for obtaining parameters of the thermosensitive wire according to the condition that the transfer charge is stably ignited;

the second calculation module is used for obtaining parameters of the transfer powder according to the stable ignition condition of the spontaneous ignition powder;

the third calculation module is used for obtaining the parameters of the spontaneous combustion gunpowder according to the stable ignition condition of the gas generating agent;

and the fourth calculation module is used for obtaining the parameters of the gas production medicament according to the condition that the piston is pushed to the bottom of the cylinder body.

A computer device comprising a memory storing a computer program and a processor implementing the steps of the method of any one of the above when the computer program is executed.

The method, the device, the storage medium and the computer equipment for calculating the parameters of the fire extinguishing system are used for calculating the parameters of all the components in the fire extinguishing system, and the maximum requirement of the superior reaction is reversely deduced through the maximum requirement of the inferior reaction when the parameters of all the components are calculated, so that all the parameters of the fire extinguishing system can be finally obtained, and the obtained parameters can meet the requirement of stable and reliable triggering of the inferior reaction.

Drawings

FIG. 1 is a schematic diagram of a fire suppression system in one embodiment.

FIG. 2 is a flow chart of a method for calculating parameters of a fire suppression system in one embodiment.

FIG. 3 is a flow chart of a method for calculating parameters of a fire suppression system in another embodiment.

Fig. 4 is a detailed flowchart illustrating step S221 in one embodiment.

Fig. 5 is a detailed flowchart of step S412 in one embodiment.

Fig. 6 is a detailed flowchart of step S251 in one embodiment.

Fig. 7 is a calculation device of parameters of a fire extinguishing system in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Fig. 1 is a schematic structural view of a fire extinguishing system in an embodiment, as shown in fig. 1, the fire extinguishing system includes a fire transfer chamber 15, a combustion chamber 16, and a cylinder 14. The heat-sensitive wire 1 and the transfer powder 13 are arranged in the fire transfer chamber 15; one part of the heat-sensitive wire 1 is positioned outside the fire transfer chamber 15, the other part is positioned in the middle of the fire transfer powder 13 and is fixed at a heat-sensitive wire fixing point 8 at the bottom of the fire transfer chamber 15, and the heat-sensitive wire 1 self-ignites when the ambient temperature is higher than the excitation temperature of the heat-sensitive wire 1; the combustion chamber 16 is connected with the fire transfer chamber 15, and a heat conduction membrane 12, a spontaneous combustion gunpowder 11 and a gas production medicament 10 are sequentially arranged in the combustion chamber in a contact manner; the cylinder 14 is connected with a combustion chamber 16, a piston 5 is arranged in the cylinder, a release valve 7 is arranged at the bottom of the cylinder, and a liquid fire extinguishing agent 6 is arranged between the piston 5 and the release valve 7; a gap is formed between the cylinder 14 and the combustion chamber 16 so that gas generated after the gas generating agent 10 is combusted enters the cylinder 14 to push the piston 5.

Illustratively, one side of the cylinder 14 is recessed inwardly to form a cavity to serve as a transfer chamber 15 and a combustion chamber 16. And the top of the fire transfer chamber 15 can be provided with a heat-resistant partition plate 3, the heat-resistant partition plate 3 is provided with a perforation 2 for the heat-sensitive wire 1 to pass through, so that one part of the heat-sensitive wire 1 is positioned outside the fire transfer chamber 15, and the other part is positioned inside the fire transfer chamber 15. The transfer chamber 15 is provided with transfer powder 13, the heat-sensitive wire 1 in the transfer chamber 15 is positioned in the middle of the transfer powder 13, and the heat-sensitive wire 1 is fixed at the fixing point of the heat-sensitive wire 1 at the bottom of the transfer chamber 15. The transfer agent 13 is a chemical agent having an extremely high calorific value and an extremely low gas production rate. When a fire fault occurs in a protected device, such as a lithium battery or the like, the ambient temperature T_{Environment(s)}Rising to the excitation temperature T of the thermo-sensitive wire 1_{1 spontaneous combustion}Causing the heat-sensitive wire 1 to self-ignite, igniting the transfer charge 13.

The combustion chamber 16 is connected with the ignition chamber 15, and the heat conducting membrane 12, the spontaneous combustion gunpowder 11 and the gas generating agent 10 are sequentially arranged in the combustion chamber 16 in a contact manner. One side of the heat-conducting membrane 12, which is far away from the spontaneous combustion gunpowder 11, is also in contact with the transfer powder 13, so that heat generated after the combustion of the transfer powder 13 is transferred to the spontaneous combustion gunpowder 11, the spontaneous combustion gunpowder 11 is spontaneously combusted, the combustion speed of the spontaneous combustion gunpowder 11 is extremely high, the gas-producing medicament 10 can be rapidly ignited, and a large amount of gas is released after the gas-producing medicament 10 is combusted.

The cylinder 14 is connected to the combustion chamber 16, and a gap is formed between the cylinder 14 and the combustion chamber 16, for example, a gas generator screen 9 is disposed between the cylinder 14 and the combustion chamber 16, so that the gas generated by the combustion of the gas generating agent 10 is released and enters the cylinder 14 after high-temperature particles are removed by the gas generator screen 9. The cylinder 14 is internally provided with a piston 5, the bottom of the cylinder 14 is provided with a release valve 7, and a liquid fire extinguishing agent 6 is also arranged between the piston 5 and the release valve 7. The high pressure gas entering the cylinder 14 pushes the piston 5 so that the liquid extinguishing agent 6 is sprayed through the release valve 7 to extinguish the fire in the equipment to be protected. The fire suppression system may also include a housing 4, with the transfer chamber 15, combustion chamber 16, and cylinders all located inside the housing 4.

The environment temperature T of the fire extinguishing system after the fire accident of the protected equipment_{Environment(s)}Rising to the excitation temperature T of the thermo-sensitive wire 1_{1 spontaneous combustion}The fire extinguishing system can be triggered to extinguish fire by spontaneous combustion of the heat-sensitive wire 1, parts such as a fire detector, a power supply and a controller are not needed, the structure is simple, regular maintenance is not needed, the cost is low, and after the piston 5 is pushed, the liquid fire extinguishing agent 6 positioned between the piston 5 and the bottom of the cylinder 14 is sprayed out from the release valve 7, so that reliable spraying and placing at 360 degrees can be realized.

Based on the fire extinguishing system, the application also provides a calculation method for calculating the parameters of the fire extinguishing system, and the method comprises the following steps:

and step S21, obtaining the parameters of the thermosensitive wire according to the condition that the transfer charge is stably ignited.

And step S22, obtaining parameters of the transfer powder according to the stable ignition condition of the self-ignition powder.

Specifically, in the ignition chamber, after the heat-sensitive wire is ignited and burnt to the ignition chamber, the heat Q generated by the heat-sensitive wire in the ignition chamber is totally burnt_1-1The heat transfer powder can be stably ignited, and the total heat generated by the combustion of the heat-sensitive wire and the heat transfer powder in the heat transfer chamber is the total heat Q required to be provided by the heat transfer chamber_{Fire transfer chamber}After passing through a series of heat losses and passesThe self-ignition condition of the self-ignition powder can be met after the heat conduction of the heat-conducting membrane is passed, so that the parameters of the heat-sensitive wire and the parameters of the powder transfer agent are reversely deduced.

For example, the condition for stable ignition of the transfer charge may include the combustion temperature T of the heat-sensitive wire_{1 combustion of}>Spontaneous combustion temperature T of transfer powder₁₃And the burning time t of the thermosensitive wire in the fire transfer chamber_1-2>The transfer charge reaches the spontaneous combustion temperature T of the transfer charge₁₃Time Δ t used₁₃And the like. The heat-sensitive wire parameters include the material, diameter, and length S of the heat-sensitive wire in the combustion chamber_1-2Etc. the parameter of the transfer charge may comprise the mass M of the transfer charge₁₃Heat value q₁₃And the like.

And step S23, obtaining the parameters of the spontaneous combustion gunpowder according to the stable ignition condition of the gas generating agent.

Specifically, in the combustion chamber, the condition that the gas generating agent can be stably ignited is calculated, so that the parameters of the self-ignition gunpowder are obtained according to the condition.

For example, the condition for stable ignition of the gas generating agent may include the combustion temperature T of the autoignition charge_{11 combustion}>Spontaneous combustion temperature T of gas production medicament₁₀Combustion time t of self-igniting powder₁₁>Spontaneous combustion temperature T of gas producing agent per unit volume in contact with spontaneous combustion gunpowder₁₀Time Δ t used₁₀And the like. The parameter of the autoignition charge may comprise the mass M of the autoignition charge₁₁Heat value q₁₁And the like.

Step S24, obtaining parameters of gas producing agent according to the condition that the piston is pushed to the bottom of the cylinder.

Specifically, the condition that the piston is pushed to the bottom of the cylinder body is the condition that the liquid fire extinguishing agent between the piston and the bottom of the cylinder body can be completely sprayed out, and the parameters of the gas generating agent are obtained according to the condition.

For example, the condition that the piston is pushed to the bottom of the cylinder may include a pushing force F generated by the gas required for the piston to move to the bottom of the cylinder_{Qi (Qi)}Resistance f not less than final position of piston_PistonThe parameter of the gas generating agent may comprise the mass M of the gas generating agent₁₀And heat value q₁₀And the like.

The parameter calculation method of the fire extinguishing system is used for calculating the parameters of all the components in the fire extinguishing system, and the maximum requirement of the superior reaction is reversely deduced according to the maximum requirement of the inferior reaction when the parameters of all the components are calculated, so that all the parameters of the fire extinguishing system can be finally obtained, and the obtained parameters can meet the requirement of stable and reliable triggering of the inferior reaction.

Fig. 3 is a method of calculating parameters of a fire suppression system in another embodiment. As shown in fig. 3, in one embodiment, the step S21 of obtaining the parameters of the thermal wire according to the condition that the transfer charge is stably ignited includes steps S211 to S213:

step S211, obtaining the heat quantity delta Q required by igniting the transfer charge of unit volume in contact with the thermosensitive wire₁₃。

In particular, the quantity of heat Δ Q required for ignition of a unit volume of transfer charge in contact with a heat-sensitive wire₁₃Comprises the following steps:

ΔQ₁₃＝K_1-11*Q_1-1＝K_1-11M_1-0*S_1-2*q_1-0(formula 1)

Wherein, K_1-11Efficiency of heat generated by heat-sensitive wire absorbed by transfer charge per unit volume of initial position, Q_1-1Heat (J), M) generated for combustion of heat-sensitive wires located inside the chamber_1-0Mass per unit length of the heat-sensitive wire (kg/m), S_1-2The length (m), q) of the heat-sensitive wire in the fire chamber_1-0The calorific value (J/kg) of the heat-sensitive wire.

Step S212, heat quantity delta Q required for igniting transfer charge per unit volume in contact with thermosensitive wire₁₃The obtained transfer powder reaches the spontaneous combustion temperature T of the transfer powder₁₃Time Δ t used₁₃。

Specifically, assuming that the transfer charge and the thermal wire in unit volume are cylinders with uniform thickness, and the thermal wire and the transfer charge can be in close contact, the thermal wire can be continuously and stably combusted (for multidimensional heat conduction, a corresponding heat conduction differential equation can be established according to actual conditions), here, a fourier thermal conductivity equation is adopted:

then it is possible to obtain:

wherein, is Δ Q₁₃The heat (J), T) required for ignition of the transfer charge per unit volume in contact with the heat-sensitive wire₁₃Is the autoignition temperature (K), Δ t, of the transfer charge₁₃The transfer powder reaches the spontaneous combustion temperature T of the transfer powder₁₃The time(s), T_0-13For heat transfer of the most remote temperature (K), lambda, by the transfer charge₁₃Is the thermal conductivity (thermal conductivity) (W/(m.K)) of the transfer powder₁₃Is the cross-sectional area (m) of the transfer charge²)，T_{0_13}For conducting the most remote temperature (K), h) by the transfer charge₁₃Is the thickness (m) of the transfer charge.

By substituting formula (1) for formula (3):

the transfer powder reaches the spontaneous combustion temperature T of the transfer powder₁₃Time Δ t used₁₃Can be obtained from testing.

Step S213, according to the burning time t of the heat-sensitive wire in the combustion chamber_1-2>The transfer powder reaches the spontaneous combustion temperature T of the transfer powder₁₃Time Δ t used₁₃Determining the length S of the heat-sensitive wire inside the combustion chamber_1-2。

In particular, the combustion time t of the heat-sensitive wire inside the combustion chamber_1-2>The transfer powder reaches the spontaneous combustion temperature T of the transfer powder₁₃Time Δ t used₁₃The condition for stable ignition of the transfer charge. From this condition, it is possible to obtain:

wherein, V₁The remaining parameters are defined as the combustion speed of the heat-sensitive wire, and the meanings of the above formula are the same.

From (equation 5), the length S of the heat-sensitive wire inside the combustion chamber can be derived_1-2：

Of course, in other embodiments, the condition for stable ignition of the transfer charge may also include the combustion temperature T of the heat-sensitive wire_{1 combustion of}>Spontaneous combustion temperature T of transfer powder₁₃Due to the combustion temperature T of the heat-sensitive wire obtained by the test_{1 combustion of}And the autoignition temperature T of the transfer charge₁₃This condition is always satisfied and therefore may not be considered.

In one embodiment, the step S22, obtaining the parameters of the transfer charge according to the condition that the autoignition charge is stably ignited includes steps S221 to S223:

step S221, acquiring the total heat Q required to be provided by the flame transfer chamber_{Fire transfer chamber}。

Specifically, the total heat Q required to be provided by the fire transfer chamber is obtained through the heat conduction in the fire transfer chamber and the heat conduction between the heat conduction membrane and the spontaneous ignition powder_{Fire transfer chamber}：

Q_{Fire transfer chamber}＝Q₁₃+Q_1-1(formula 7)

Wherein Q is₁₃For heat (J), Q) generated by combustion of transfer charges inside the transfer chamber_1-1For transferring the heat (J) generated by the combustion of the heat-sensitive wire inside the fire chamber.

In one embodiment, as shown in FIG. 4, step S221, the total heat Q required to be provided by the transfer chamber is obtained_{Fire transfer chamber}Steps S411 to S413 may be included:

in this embodiment, the total heat Q to be supplied is transferred to the inside of the firebox_{Fire transfer chamber}It can also be expressed as:

Q_{fire transfer chamber}＝ΔQ₁₂+ΔQ_{Fire transfer chamber wall}(formula 8)

Wherein, is Δ Q₁₂Heat (J), Δ Q, absorbed by the heat-conducting membrane_{Fire transfer chamber wall}The heat absorbed by the walls of the flame chamber (J).

Step S411, obtaining the heat quantity delta Q absorbed by the inner wall of the fire transfer chamber_{Fire transfer chamber wall}。

ΔQ_{Fire transfer chamber wall}＝C_{Fire transfer chamber wall}M_{Fire transfer chamber wall}△(T_{Fire transfer chamber wall}-T_{0-fire transfer chamber wall}) (formula 9)

Wherein, C_{Fire transfer chamber wall}Specific heat capacity of the walls of the transfer chamber, M_{Fire transfer chamber wall}Is the mass (g), T, of the walls of the transfer chamber_{Fire transfer chamber wall}Is the final temperature (K), T, of the walls of the transfer chamber_{0_ fire transfer chamber wall}The temperature (K) at the most distal end of the thermal conduction of the walls of the transfer chamber. The specific heat capacity of common metal materials can be found.

Step S412, obtaining the heat quantity delta Q absorbed by the heat conducting membrane₁₂As shown in fig. 5, the method may specifically include steps S511 to S514:

step S511, obtaining the autoignition temperature T of the autoignition powder in the autoignition powder₁₁At constant temperature heating, and the time delta t required for spontaneous combustion₁₁。

Specifically, assuming that the heat-conducting membrane and the spontaneous combustion powder are cylinders with uniform thickness, the heat-conducting membrane continuously stabilizes the spontaneous combustion temperature T of the spontaneous combustion powder₁₁Elapsed time Δ t₁₁The spontaneous combustion of the spontaneous combustion powder begins, and the spontaneous combustion temperature T of the spontaneous combustion powder in the spontaneous combustion powder can be obtained according to the Fourier thermal conductivity equation, namely the formula (2)₁₁At constant temperature heating, and the time delta t required for spontaneous combustion₁₁：

Wherein, is Δ Q₁₁The actual amount of heat (J), h) absorbed for the spontaneous combustion of the spontaneous combustion powder₁₁Is the thickness (m), lambda of the autoignition powder₁₁Is the thermal conductivity (thermal conductivity) (W/(m.K)) of the autoignition powder₁₁Is the cross-sectional area (m) of the autoignition powder²)，T₁₁Is the autoignition temperature (K) of the autoignition powder，T_{11_1}The temperature (K) at the furthest end of the thermal conduction of the autoignition charge.

Step S512, acquiring the highest temperature T reached by the contact surface of the heat-conducting membrane and the spontaneous combustion gunpowder_12-2Time Δ t used_12-2。

Specifically, the highest temperature T reached by the contact surface of the heat-conducting membrane and the autoignition powder can be obtained according to the fourier heat conduction equation, namely the formula (2)_12-2Time Δ t used_12-2Comprises the following steps:

wherein, is Δ Q₁₂To reach the temperature T of the heat-conducting membrane₁₂The amount of heat (J), h) to be absorbed₁₂Is the thickness (m), lambda, of the heat-conducting membrane₁₂The thermal conductivity (thermal conductivity) (W/(m.K)) of the heat-conducting film (S)₁₂Is the cross-sectional area (m) of the heat-conducting membrane²)，T₁₂Is the final temperature (K), T, of the thermally conductive film_{12_2}The contact surface of the heat-conducting membrane and the spontaneous combustion gunpowder reaches the highest temperature (K).

Step S513, obtaining that the contact surface of the heat conduction membrane and the spontaneous combustion gunpowder reaches the spontaneous combustion temperature T of the spontaneous combustion gunpowder₁₁Time Δ t used_12-1。

Specifically, according to the Fourier thermal conductivity equation, namely the formula (2), the temperature T of the contact surface of the heat-conducting membrane and the spontaneous combustion gunpowder reaching the spontaneous combustion temperature of the spontaneous combustion gunpowder can be obtained₁₁Time Δ t used_12-1Comprises the following steps:

wherein, is Δ Q₁₂、h₁₂、λ₁₂、S₁₂、T₁₂Has the same meaning as the above formula, T_{12_1}The temperature (K) at the furthest end of the thermal conduction of the thermally conductive membrane.

Step S514, according to the autoignition temperature T of the autoignition powder₁₁The above time (. DELTA.t)_12-2-Δt_12-1) Greater than the autoignition temperature T of the autoignition powder₁₁At constant temperature heating, and the time delta t required for spontaneous combustion₁₁Determining the amount of heat absorbed by the thermally conductive diaphragm, Δ Q₁₂Minimum value of (a) Q_12min。

Specifically, the autoignition temperature of the autoignition powder is T₁₁The self-ignition powder is at the self-ignition temperature T of the self-ignition powder₁₁The above time (. DELTA.t)_12-2-Δt_12-1) Greater than the autoignition temperature T of the autoignition powder₁₁At constant temperature heating, and the time delta t required for spontaneous combustion₁₁The condition of stable ignition of the self-ignition gunpowder is adopted. From this condition, it is possible to obtain:

because the heat conducting membrane is used for heating the self-ignition explosive slowly, and the components of the self-ignition explosive are single, the specific heat capacity of the self-ignition explosive can be calculated conveniently, so that the theoretical maximum heat required by the self-ignition of the self-ignition explosive can be calculated more easily by adopting a heat calculation formula without using a Fourier thermal conductivity equation.

Supposing that the spontaneous combustion gunpowder is formed by uniformly mixing N substances, and the specific heat capacity of each component is C₁/C₂..C_nThe mass fraction of each component is P₁/P₂..P_nThen, the specific heat capacity of the autoignition powder can be calculated: c₁₁＝C₁ P₁+C₂P₂+…+C_n P_n(ii) a And P is₁+P₂+P_n＝1。

The maximum heat quantity delta Q required to be absorbed by the spontaneous combustion of the spontaneous combustion gunpowder can be obtained_11maxComprises the following steps:

ΔQ_11max＝C₁₁M₁₁△(T₁₁-T_0-11) (formula 14)

Wherein M is₁₁Is the mass (g), T, of autoignition gunpowder₁₁Is the autoignition temperature (K), T, of the autoignition powder_0-11Initial temperature (K) of the autoignition charge.

Actual quantity of heat delta Q absorbed when spontaneous combustion of spontaneous combustion powder₁₁Is equal toMaximum quantity of heat delta Q required to be absorbed by spontaneous combustion of spontaneous combustion powder_11maxAccording to the formulas (10) and (14), the autoignition temperature T of the autoignition powder can be obtained₁₁At constant temperature heating, and the time delta t required for spontaneous combustion₁₁The maximum value of (d) is:

substituting equation (15) into (equation 13) can yield:

from (equation 16), the amount of heat Δ Q absorbed by the heat conductive film can be derived₁₂Minimum value of (a) Q_12min：

Step S413, according to the heat quantity delta Q absorbed by the inner wall of the fire chamber_{Fire transfer chamber wall}And obtaining the heat quantity delta Q absorbed by the heat-conducting film₁₂Obtaining the total heat Q required to be provided by the fire transfer chamber_{Fire transfer chamber}；

Specifically, the total heat Q required to be provided by the transfer chamber can be obtained according to (formula 8), (formula 9) and (formula 17)_{Fire transfer chamber}。

S222, according to the length S of the thermosensitive wire in the combustion chamber_1-2Obtaining the heat Q generated by the thermosensitive wire_1-1。

In particular, the heat Q generated by the heat-sensitive wire_1-1Comprises the following steps:

Q_1-1＝S_1-2*M_1-0*q_1-0(formula 18)

From (equation 5) and (equation 18), it can be derived:

s223, providing the total heat Q according to the requirement of the fire transfer chamber_{Fire transfer chamber}And heat Q generated by the heat-sensitive wire_1-1Obtaining the mass M of the transfer powder₁₃And heat quantity q₁₃。

Specifically, according to (formula 7):

Q₁₃＝Q_{fire transfer chamber}-Q_1-1＝M₁₃q₁₃(formula 20)

Wherein M is₁₃Is the mass (kg), q, of the transfer charge inside the transfer chamber₁₃The heat value (J/kg) of the transfer charge is shown.

The total heat quantity Q required to be provided by the flame transfer chamber obtained in the step S413 is combined_{Fire transfer chamber}And the heat Q generated by the thermosensitive wire obtained in step S222_1-1The mass M of the transfer powder in the transfer chamber can be obtained₁₃And heat value q of transfer charge₁₃. Alternatively, the transfer powder is selected from transfer powder with large combustion heat and specific heat capacity, and the combustion of the transfer powder rapidly generates a large amount of heat and gas and hot solid residues. Optionally, the total heat Q required to be provided in the transfer chamber_{Fire transfer chamber}Under the condition of no change, the heat quantity delta Q absorbed by the heat-conducting membrane can be increased as much as possible₁₂The heat absorbed by the wall of the transfer chamber is reduced, so that the specific heat capacity of the materials of the heat-conducting membrane and the wall of the transfer chamber is selected in a targeted manner.

In one embodiment, the step S23 of obtaining the parameters of the autoignition charge according to the condition of stable ignition of the gas generating agent includes steps S231 to S235:

step S231, obtaining heat Q generated by self-ignition gunpowder combustion₁₁。

In particular, the heat Q generated by combustion of the propellant₁₁Comprises the following steps:

Q₁₁＝M₁₁q₁₁(formula 21)

Wherein M is₁₁Is the mass (g), q, of autoignition gunpowder₁₁The calorific value (J/g) of the autoignition powder is shown.

Step S232, obtaining the burning time t of the spontaneous combustion gunpowder₁₁。

In particular, the time t for the self-igniting charge to burn₁₁Comprises the following steps:

wherein, V₁₁The combustion speed (g/s) of the autoignition powder is shown.

Step S233, obtaining the heat quantity delta Q required by igniting the gas producing medicament in unit volume contacted with the spontaneous combustion gunpowder₁₀。

Specifically, the heat quantity delta Q required by igniting the gas generating agent in unit volume in contact with the spontaneous combustion gunpowder₁₀Comprises the following steps:

ΔQ₁₀＝K_11-10*Q₁₁(formula 23)

Wherein, K_11-10Efficiency of heat absorption by gas-generating agent per unit volume, Q, for heat generated by self-igniting gunpowder₁₁Is the heat (J) generated by the combustion of the self-ignition gunpowder.

Step S234, obtaining the spontaneous combustion temperature T of the gas production medicament reached by the gas production medicament per unit volume in contact with the spontaneous combustion gunpowder₁₀Time Δ t used₁₀。

Wherein λ is₁₀The thermal conductivity (W/(m.K)) of the gas-generating agent is₁₀Is the cross-sectional area (m) of gas generating agent²)，T₁₀The spontaneous combustion temperature (K), T, of the gas-generating agent_{0_10}The temperature (K, h) of the most remote heat transfer of the spontaneous combustion gunpowder to the gas production medicament₁₀Is the thickness (m) of the gas generating agent.

Step S235, according to the burning time t of the spontaneous ignition powder₁₁>Spontaneous combustion temperature T of gas producing agent per unit volume in contact with spontaneous combustion gunpowder₁₀Time Δ t used₁₀Determining the minimum mass M of the autoignition charge_11min。

In particular, the time t for the self-igniting charge to burn₁₁>Spontaneous combustion temperature T of gas producing agent per unit volume in contact with spontaneous combustion gunpowder₁₀Time Δ t used₁₀Is the condition for stable ignition of the gas generating agent. Combining (equation 22) and (equation 24) according to this condition can yield:

the minimum mass M of the autoignition powder can be derived from the equation (25)_11min：

In one embodiment, the step S24 of obtaining the parameters of the gas generating agent according to the condition that the piston is pushed to the bottom of the cylinder includes steps S241 to S242:

step S241 of acquiring a thrust F generated by the gas required for the piston to move to the bottom of the cylinder_{Qi (Qi)}。

Specifically, the total heat Q generated by the combustion of the gas-producing agent₁₀Comprises the following steps:

Q₁₀＝M₁₀q₁₀(formula 27)

Wherein M is₁₀Is the mass (g), q of gas-generating agent₁₀Is the calorific value (J/g) of the gas generating agent.

If the heat generated by the gas generating agent is instantly finished, the heat Q of the cylinder body in the initial state is obtained after a series of heat losses_{0-mixed gas}Comprises the following steps:

Q_{0-mixed gas}＝K_{10-gas mixture}*Q₁₀(formula 28)

Wherein, K_{10-gas mixture}The coefficient ratio of the heat generated by the combustion of the gas production agent to the heat of the mixed gas in the final state.

Heat Q remained when piston moves to bottom of cylinder_{1-mixed gas}Comprises the following steps:

Q_{1-mixed gas}＝Q_{0-mixed gas}-(W_Piston+Q_{Heat transfer}) (formula 29)

Wherein, W_PistonIs in an initial stateThe gas generated by the combustion of the gas-producing agent in the state pushes the piston to the bottom of the cylinder body to do work Q_{Heat transfer}The energy loss caused by heat transfer is generated when the gas generated by the combustion of the gas generating agent pushes the piston to the bottom of the cylinder body in the initial state.

And calculating the mole number of the gas generated after the gas production agent is combusted and the percentage of each gas component according to the formula of the gas production agent, and converting the specific heat capacity of the mixed gas according to a specific heat superposition rule. Assuming that the specific heat capacity of each component generated after combustion of the gas-generating agent is C₁/C₂..C_nThe mass fraction of each component is P₁/P₂..P_nThen, the specific heat capacity of the mixed gas can be calculated as follows: c_{Mixed gas}＝C₁ P₁+C₂ P₂+…+C_n P_nAnd P is₁+P₂+P_n＝1。

The temperature of the mixed gas is T when the piston moves to the bottom of the cylinder body_{1-mixed gas}：

Wherein, C_{Mixed gas}Specific heat capacity of the mixed gas, M_{Mixed gas}Is the mass (g) of the mixed gas generated by burning the gas generating agent.

Then obtaining the following according to an ideal gas state equation PV ═ nRT:

when the piston moves to the bottom of the cylinder body, the pressure value P of the cylinder body is as follows:

wherein n is_{Mixed gas}The mole number of the mixed gas generated by the combustion of the gas generating agent, R is the universal gas constant (J/(mol) K)), V_{Cylinder body}Is the volume (m) of the cylinder body³)。

Thrust F generated by gas when piston moves to bottom of cylinder_{Qi (Qi)}：

Wherein S is_PistonIs the cross-sectional area (m) of the piston³) And r is the radius (m) of the piston.

By substituting (formula 31), (formula 30), (formula 29), (formula 28), and (formula 27) into (formula 32), it is possible to obtain:

step S242, thrust F generated from gas required for the piston to move to the bottom of the cylinder_{Qi (Qi)}Resistance f not less than final position of piston_PistonDetermining the mass M of the gas-generating agent₁₀And heat value q₁₀。

In particular, the thrust F generated by the gas required for the piston to move to the bottom of the cylinder_{Qi (Qi)}Resistance f not less than final position of piston_PistonIs the condition in which the piston is pushed to the bottom of the cylinder. Combining (formula 33) according to this condition can yield:

the mass M of the gas-generating agent can be derived from the formula (34)₁₀And heat value q₁₀The conditions met are:

in an embodiment, the method for calculating parameters of a fire extinguishing system further includes steps S251 to S252:

step S251, obtaining the time t from the beginning to the end of the spraying of the liquid fire extinguishing agent from the release valve_{Spray assembly}The time t from the triggering of the fire extinguishing system to the end of the ejection of the liquid extinguishing agent from the release valve_{General assembly}And the flow rate Q at the time of the discharge of the liquid extinguishing agent from the relief valve_{Nozzle with a nozzle body}。

Specifically, the time t from the start to the end of the discharge of the liquid fire extinguishing agent from the release valve_{Spray assembly}Can be obtained by testing. Flow rate Q when the relief valve ejects liquid extinguishing agent_{Nozzle with a nozzle body}Comprises the following steps:

Q_{nozzle with a nozzle body}＝S_{Nozzle with a nozzle body}*V_{Nozzle with a nozzle body}＝πR² _{Nozzle with a nozzle body}*V_{Nozzle with a nozzle body}(formula 36)

Wherein S is_{Nozzle with a nozzle body}To release the cross-sectional area (m2), V, of the nozzle on the valve_{Nozzle with a nozzle body}The velocity of the liquid extinguishing agent sprayed from the release valve, R_{Nozzle with a nozzle body}Is the radius (m) of the nozzle on the relief valve.

In one embodiment, as shown in FIG. 6, the time t from the time the fire extinguishing system is triggered to the end of the ejection of the liquid fire extinguishing agent from the release valve is obtained in step S251_{General assembly}Specifically, steps S611 to S615 may be included:

step S611, acquiring the time t of the combustion of the thermosensitive wire outside the combustion chamber₁。

Specifically, the heat-sensitive wire burns outside the fire box for a time t₁Must be less than the system set point and this value will also be used to calculate the total fire extinguishing unit activation time, i.e. the time t from the start to the end of the discharge of the liquid extinguishing agent from the release valve_{Spray assembly}. The heat-sensitive wire burns for a time t outside the fire chamber₁Comprises the following steps:

t₁＝t₀+S_1-1/V₁(formula 37)

Wherein, t₀Sensing the trigger time (S), S for a thermal wire trigger head_1-1The length (m), V, of the heat-sensitive wire outside the heat transfer chamber₁The combustion speed (m/s) of the heat-sensitive wire.

Step S612, acquiring the time t required by the transfer charge to generate the maximum heat_{Combustion chamber}。

In particular, since the transfer charge is generally completely burnt within 3ms to 5ms, the maximum pressure P can be measured, for example, in a closed container by means of a pressure sensor_maxThe time is taken, so the reaction time of the transfer charge can be ignored, and t is taken_{Combustion chamber ≈}The transfer powder reaches the spontaneous combustion temperature T of the transfer powder₁₃Time Δ t used₁₃。

Step S613, acquiring the highest temperature T reached by the contact surface of the heat-conducting membrane and the spontaneous combustion gunpowder_12-2Time Δ t used_12-2。

Specifically, the highest temperature T reached by the contact surface of the heat-conducting membrane and the autoignition powder can be obtained according to the implementation manner in the step S512_12-2Time Δ t used_12-2And will not be described herein.

Step S614, obtaining the time t from the gas producing agent to start burning to the piston_10-1。

Specifically, the time t from the start of combustion of the gas generating agent to the pushing of the piston can be obtained through testing_10-1。

Step S615, according to the time t from the beginning to the end of the spraying of the liquid fire extinguishing agent from the release valve_{Spray assembly}Time t of combustion of the heat-sensitive wire outside the combustion chamber₁Time t required for the transfer charge to generate maximum heat_{Combustion chamber}The contact surface of the heat-conducting membrane and the spontaneous combustion gunpowder reaches the highest temperature T_12-2Time Δ t used_12-2The time t from the start of combustion of the gas generating agent to the pushing of the piston_10-1Obtaining the time t from the beginning to the end of the spraying of the liquid fire extinguishing agent from the release valve_{General assembly}。

Specifically, the time t from the start to the end of the discharge of the liquid fire extinguishing agent from the release valve_{General assembly}Comprises the following steps:

t_{general assembly}＝t_{Spray assembly}+t₁+t_{Burning combustion}+Δt_12-2+t_10-1(formula 38)

Step S252, determining the time t from the start to the end of the discharge of the liquid fire extinguishing agent from the release valve_{Spray assembly}The time t from the triggering of the fire extinguishing system to the end of the ejection of the liquid extinguishing agent from the release valve_{General assembly}And the flow rate Q at the time of the discharge of the liquid extinguishing agent from the relief valve_{Nozzle with a nozzle body}Whether the quality meets the requirements or not, if not, the quality M of the gas production medicament is judged₁₀And (6) correcting.

Specifically, the time t from the start to the end of the discharge of the liquid fire extinguishing agent from the release valve may be individually given_{Spray assembly}The fire extinguishing system is triggered until the liquid extinguishing agent is sprayed out of the release valveTime of completion t_{General assembly}And the flow rate Q at the time of the discharge of the liquid extinguishing agent from the relief valve_{Nozzle with a nozzle body}Setting a first time range, a second time range and a flow range, if the time t from the beginning to the end of the spraying of the liquid fire extinguishing agent from the release valve is met_{Spray assembly}In a first time range, the time t from the triggering of the fire extinguishing system to the end of the ejection of the liquid extinguishing agent from the release valve_{General assembly}Flow rate Q in the second time range and when the release valve ejects the liquid extinguishing agent_{Nozzle with a nozzle body}Within the flow range, the function of the fire extinguishing system meets the fire extinguishing requirement, otherwise, the mass M of the gas generating agent is₁₀And correcting until the function of the fire extinguishing system meets the fire extinguishing requirement.

In an embodiment, the piston is wrapped with a piston sealing ring (not shown in fig. 1), and the method for calculating the parameters of the fire extinguishing system further comprises: according to the flow Q of the liquid extinguishing agent sprayed by the release valve_{Nozzle with a nozzle body}(ii) a Obtaining the movement velocity V of the piston_PistonAnd according to the speed V of movement of the piston_PistonAnd determining the material of the piston sealing ring.

In particular, the velocity V at which the liquid extinguishing agent is sprayed from the release valve_{Nozzle with a nozzle body}Comprises the following steps:

wherein, V_{Volume of liquid discharge}Volume of liquid extinguishing agent sprayed after piston pushes to bottom of cylinder body, V_PistonIs the speed of movement of the piston.

The movement velocity V of the piston can be derived from the (equation 36) and (equation 39)_PistonComprises the following steps:

speed of movement V of piston_PistonCan be used to determine the material of the piston seal ring.

It should be understood that although the various steps in the flow charts of fig. 2-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-6 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.

In one embodiment, a calculation device of parameters of a fire suppression system is also provided for calculating the parameters of the fire suppression system in the embodiment of fig. 1. As shown in fig. 7, the calculation means 70 of the parameters of the fire extinguishing system comprises a first calculation module 71, a second calculation module 72, a third calculation module 73 and a fourth calculation module 74.

The first calculation module 71 is configured to obtain parameters of the thermosensitive wire according to a condition that the transfer charge is stably ignited; the second calculation module 72 is used for obtaining the parameters of the transfer charge according to the stable ignition condition of the self-ignition charge; the third calculation module 73 is used for obtaining the parameters of the self-ignition gunpowder according to the condition that the gas generating agent is stably ignited; the fourth calculating module 74 is used for obtaining the parameters of the gas generating agent according to the condition that the piston is pushed to the bottom of the cylinder.

It should be noted that the calculating device 70 for the parameters of the fire extinguishing system can implement any step in the calculating method for the parameters of the fire extinguishing system, and details are not repeated in this embodiment.

In one embodiment, a computer device is further provided, which includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of the above method embodiments when executing the computer program.

In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method of calculating parameters of a fire suppression system for parameters of the fire suppression system, the fire suppression system comprising:

the method comprises the following steps:

2. The method as claimed in claim 1, wherein said obtaining parameters of said heat-sensitive wire according to the condition of stable ignition of said transfer charge comprises:

According to the burning time t of the thermosensitive wire in the combustion chamber_1-2>The transfer charge reaches the spontaneous combustion temperature T of the transfer charge₁₃Time Δ t used₁₃DeterminingThe length S of the thermosensitive wire in the fire transfer chamber_1-2；

Wherein a combustion time t of the heat-sensitive wire inside the combustion chamber_1-2>The transfer charge reaches the spontaneous combustion temperature T of the transfer charge₁₃Time Δ t used₁₃The condition for stable ignition of the transfer charge.

3. The method as claimed in claim 2, wherein the obtaining the parameter of the transfer charge according to the condition of stable ignition of the self-ignition charge comprises:

Wherein the autoignition temperature of the autoignition gunpowder is T₁₁Said autoignition powder is at the autoignition temperature T of said autoignition powder₁₁The above time (. DELTA.t)_12-2-Δt_12-1) Greater than said autoignition temperature T of said autoignition charge₁₁Constant temperature ofTime Δ t required for spontaneous combustion under heating₁₁The condition for stable ignition of the self-ignition gunpowder is adopted;

according to the heat quantity delta Q absorbed by the inner wall of the fire transfer chamber_{Fire transfer chamber wall}And obtaining the heat quantity delta Q absorbed by the heat-conducting membrane₁₂Obtaining the total heat Q required to be provided by the flame transfer chamber_{Fire transfer chamber}；

4. The method as claimed in claim 1, wherein the obtaining the parameter of the autoignition charge according to the condition of stable ignition of the gas generating agent comprises:

5. The method of claim 1, wherein the obtaining the gas generating agent parameter according to the condition that the piston is pushed to the bottom of the cylinder comprises:

obtaining the thrust F generated by the gas needed by the piston to move to the bottom of the cylinder body_{Qi (Qi)}；

6. The method of any of claims 1 to 5, further comprising:

7. The method of claim 6, wherein said obtaining said liquid fire extinguishing agent starts to be sprayed from said release valve to end at time t_{General assembly}The method comprises the following steps:

obtaining said heat-sensitive wire in said combustion chamberTime t of external combustion₁；

8. The method of claim 1, wherein the piston is externally wrapped with a piston seal, the method further comprising:

9. An apparatus for calculating parameters of a fire suppression system, for parameters of a fire suppression system, the fire suppression system comprising:

the device comprises:

10. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program implements the steps of the method of any of claims 1-8.