CN112121341B

CN112121341B - Method and device for calculating parameters of fire extinguishing system, storage medium and equipment

Info

Publication number: CN112121341B
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: 2022-08-30
Anticipated expiration: 2040-09-24
Also published as: CN112121341A

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, and is complicated in structure, and requires periodic maintenance, which is costly.

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 push a piston so that the liquid fire extinguishing agent is sprayed out to extinguish fire.

There is then no specific calculation method to define the parameters of the various components for a pistonic fire suppression 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 generating agent 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 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 ignited ₁₃ ；

The quantity of heat Δ Q required for ignition according to the unit volume of the transfer charge in contact with the heat-sensitive wire ₁₃ Obtaining the spontaneous combustion temperature T of the transfer charge reaching the transfer charge ₁₃ Time Δ t used ₁₃ ；

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 charge ₁₃ Time Δ t used ₁₃ Determining the length S of the heat-sensitive wire inside the heat 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 charge ₁₃ Time Δ t used ₁₃ The condition for stable ignition of the transfer charge is adopted.

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 _{Wall of fire transfer chamber} ；

Obtaining the heat quantity delta Q absorbed by the heat-conducting film ₁₂ The method comprises the following steps:

obtaining the autoignition temperature T of the autoignition powder in the autoignition powder ₁₁ At constant temperature heating, and the time delta t required for spontaneous combustion ₁₁ ；

Obtaining the highest temperature T reached by the contact surface of the heat-conducting membrane and the spontaneous combustion gunpowder _12-2 Time 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 gunpowder ₁₁ Time Δ t used _12-1 ；

According to the spontaneous combustion temperature T of the spontaneous combustion gunpowder ₁₁ The above time (. DELTA.t) _12-2 -Δt _12-1 ) Greater than said autoignition temperature T of said autoignition charge ₁₁ Time Δ t required for spontaneous combustion under constant temperature heating ₁₁ Determining the amount of heat absorbed by the thermally conductive diaphragm, Δ Q ₁₂ Minimum value of (Δ Q) _12min ；

Wherein the autoignition temperature of the autoignition gunpowder is T ₁₁ Said autoignition powder is at the autoignition temperature T of said autoignition powder ₁₁ The above time (. DELTA.t) _12-2 -Δt _12-1 ) Greater than said autoignition powder at said autoignition temperature T ₁₁ At constant temperature heating, and the time delta t required for spontaneous combustion ₁₁ The 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 membrane ₁₂ Obtaining 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 _1-2 Obtaining 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 _1-1 Obtaining the mass M of the transfer charge ₁₃ And heat quantity q ₁₃ 。

In one embodiment, the obtaining of the parameters of the autoignition powder according to the condition of stable ignition of the gas generating agent comprises:

obtaining the heat Q generated by the combustion of the self-ignition gunpowder ₁₁ ；

Obtaining the combustion time t of the spontaneous combustion gunpowder ₁₁ ；

Obtaining the heat quantity delta Q required by igniting the gas generating medicament per unit volume in contact with the spontaneous ignition powder ₁₀ ；

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 gunpowder ₁₀ Time Δ t used ₁₀ ；

According to the burning time t of the self-ignition gunpowder ₁₁ >The spontaneous combustion temperature T of the gas generating agent in unit volume in contact with the spontaneous combustion gunpowder ₁₀ Time Δ t used ₁₀ Determining the minimum mass M of said autoignition charge _11min ；

Wherein the time t of combustion of the self-ignition gunpowder ₁₁ >The spontaneous combustion temperature T of the gas generating agent in unit volume in contact with the spontaneous combustion gunpowder ₁₀ Time Δ t used ₁₀ The 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 thrust F generated by the gas needed by the piston to move to the bottom of the cylinder body _{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 _Piston Determining the mass M of said gas-generating agent ₁₀ And heat value q ₁₀ ；

Wherein the thrust F generated by the gas required for the piston to move to the bottom of the cylinder _{Qi (Qi)} Resistance f ≧ the final position of the piston _Piston Is 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 for spraying liquid} 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 met ₁₀ And (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 (1)} The method comprises the following steps:

acquiring the time t of the heat-sensitive wire burning outside the combustion chamber ₁ ；

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 chamber ₁ The 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 _12-2 Time Δ t used _12-2 The time t from the start of combustion of the gas generating agent to the pushing of the piston _10-1 Obtaining 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 for spraying liquid} Obtaining the motion speed V of the piston _Piston ；

According to the speed V of movement of the piston _Piston And 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 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 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 generating agent 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 explosive 11 and a gas generating agent 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 by combustion of the gas generating agent 10 enters the cylinder 14 to push the piston 5.

Illustratively, one side of the cylinder 14 is recessed to form a cavityA flame-transmitting 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 thermal wire 1 _{1 spontaneous combustion} Causing the wire 1 to self-ignite thereby 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 conducted 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 environmental temperature T of the fire extinguishing system after the fire accident of the protected equipment occurs _{Environment(s) of} 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 the spontaneous combustion of the heat-sensitive wire 1 without a fire detector, a power supply and controlThe parts such as the device and the like have simple structure, do not need regular maintenance and have lower cost, 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 the reliable spraying of the liquid fire extinguishing agent can be realized by tilting 360 degrees.

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 _1-1 The 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 a series of heat losses and heat conduction through the heat conduction membrane, the spontaneous combustion condition of the spontaneous combustion gunpowder can be met, so that the parameters of the heat-sensitive wire and the parameters of the transfer powder 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 powder ₁₃ And 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 charge ₁₃ Time Δ t used ₁₃ And so on. The heat-sensitive wire parameters include the material, diameter, and length S of the heat-sensitive wire in the combustion chamber _1-2 Etc. the parameter of the transfer charge may comprise the mass M of the transfer charge ₁₃ Heat value q ₁₃ And the like.

And step S23, obtaining the parameters of the spontaneous ignition powder 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.

Exemplary conditions for stable ignition of the gas generant formulation may include autoignition of the propellantCombustion temperature T _{11 combustion} >Spontaneous combustion temperature T of gas production medicament ₁₀ Combustion time t of self-igniting powder ₁₁ >Spontaneous combustion temperature T of gas producing agent per unit volume in contact with spontaneous combustion gunpowder ₁₀ Time Δ t used ₁₀ And the like. The parameter of the autoignition charge may comprise the mass M of the autoignition charge ₁₁ Heat value q ₁₁ And 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 is a condition that the liquid extinguishing agent between the piston and the bottom of the cylinder 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 _Piston The parameter of the gas generating agent may comprise the mass M of the gas generating agent ₁₀ And heat value q ₁₀ And 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 needed by igniting the transfer charge of unit volume in contact with the thermosensitive wire ₁₃ 。

In particular, the quantity of heat Δ Q required for ignition of a unit volume of transfer charge in contact with a heat-sensitive wire ₁₃ Comprises the following steps:

(formula 1)

Wherein, K _1-11 Efficiency of heat generated by the heat-sensitive wire absorbed by the transfer charge per unit volume of the initial position, Q _1-1 Heat (J), M generated for combustion of heat-sensitive wires located inside the transfer chamber _1-0 Mass per unit length of the heat-sensitive wire (kg/m), S _1-2 The length (m), q) of the heat-sensitive wire in the fire chamber _1-0 The 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 wire ₁₃ The obtained transfer powder reaches the spontaneous combustion temperature T of the transfer powder ₁₃ Time Δ t used ₁₃ 。

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:

(formula 2)

Then it is possible to obtain:

(formula 3)

Wherein, is Δ Q ₁₃ The heat (J), T) required for ignition of the transfer charge per unit volume in contact with the heat-sensitive wire ₁₃ Is the autoignition temperature (K), Δ t, of the transfer charge ₁₃ The transfer powder reaches the spontaneous combustion temperature T of the transfer powder ₁₃ The time(s), T _0-13 For heat transfer of the most remote temperature (K), lambda, by the transfer charge ₁₃ Is the thermal conductivity (thermal conductivity) (W/(m.K)) of the transfer powder ₁₃ Is the cross-sectional area (m) of the transfer charge ² ），T _{0_13} For conducting the most remote temperature (K), h) by the transfer charge ₁₃ Is the thickness (m) of the transfer charge.

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

(formula 4)

The transfer powder reaches the spontaneous combustion temperature T of the transfer powder ₁₃ Time Δ t used ₁₃ Can 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 powder ₁₃ Time Δ t used ₁₃ Determining 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 powder ₁₃ Time Δ t used ₁₃ The condition for stable ignition of the transfer charge. From this condition, it is possible to obtain:

(formula 5)

Wherein, V ₁ The 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 ：

(formula 6)

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 powder ₁₃ Due 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 charge ₁₃ This 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} ：

(formula 7)

Wherein Q is ₁₃ Heat (J), Q) generated by combustion of transfer charge inside the transfer chamber _1-1 For 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 required to be supplied in the interior of the fire chamber _{Fire transfer chamber} It can also be expressed as:

(formula 8)

Wherein, is Δ Q ₁₂ Heat (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} 。

(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 membrane ₁₂ As 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 powder ₁₁ At constant temperature heating, and the time delta t required for spontaneous combustion ₁₁ 。

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 powder ₁₁ Elapsed time t ₁₁ The 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) ₁₁ At constant temperature heating, and the time delta t required for spontaneous combustion ₁₁ ：

(formula 10)

Wherein Q is ₁₁ The actual amount of heat (J), h) absorbed for the spontaneous combustion of the spontaneous combustion powder ₁₁ Is the thickness (m), lambda of the autoignition powder ₁₁ Is the thermal conductivity (thermal conductivity) (W/(m.K)) of the autoignition powder ₁₁ Is the cross-sectional area (m) of the autoignition powder ² ），T ₁₁ Is the autoignition temperature (K), T, of the autoignition powder _{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 _12-2 Time 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) _12-2 Time Δ t used _12-2 Comprises the following steps:

(formula 11)

Wherein Q is ₁₂ For the heat-conducting membrane to reach the temperature T ₁₂ The amount of heat (J), h) to be absorbed ₁₂ Is the thickness (m), lambda, of the heat-conducting membrane ₁₂ Is the thermal conductivity (heat conductivity) (W/(m.K)), S) of the heat-conducting film ₁₂ Is the cross-sectional area (m) of the heat-conducting membrane ² ），T ₁₂ Is 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 gunpowder ₁₁ Time 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 obtained ₁₁ Time Δ t used _12-1 Comprises the following steps:

(formula 12)

Wherein Q is ₁₂ 、h ₁₂ 、λ ₁₂ 、S ₁₂ 、T ₁₂ Has 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 powder ₁₁ The above time (. DELTA.t) _12-2 -Δt _12-1 ) Greater than the autoignition temperature T of the autoignition powder ₁₁ Time Δ t required for spontaneous combustion under constant temperature heating ₁₁ Determining the amount of heat absorbed by the thermally conductive diaphragm, Δ Q ₁₂ Minimum value of (Δ Q) _12min 。

Specifically, the autoignition temperature of the autoignition powder is T ₁₁ The self-ignition powder is at the self-ignition temperature T of the self-ignition powder ₁₁ The above time (. DELTA.t) _12-2 -Δt _12-1 ) Greater than the autoignition temperature T of the autoignition powder ₁₁ Time Δ t required for spontaneous combustion under constant temperature heating ₁₁ The condition of stable ignition of the self-ignition gunpowder is adopted. From this condition, it is possible to obtain:

(formula 13)

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 C ₁ / C ₂ .. C _n The mass fraction of each component is P ₁ / P ₂ ..P _n Then, the specific heat capacity of the autoignition powder can be calculated: c ₁₁ =C ₁ P ₁ +C ₂ P ₂ +…+C _n P _n (ii) a And P is ₁ + P ₂ +P _n =1。

The maximum heat Q absorbed by the spontaneous combustion of the spontaneous combustion gunpowder can be obtained _11max Comprises the following steps:

(formula 14)

Wherein M is ₁₁ Is the mass (g), T, of autoignition powder ₁₁ Is the autoignition temperature (K), T, of the autoignition powder _0-11 Initial temperature (K) of the autoignition charge.

The actual heat Q absorbed when the self-ignition powder self-ignites ₁₁ Equal to the maximum quantity Q of heat required to be absorbed by the spontaneous combustion of the spontaneous combustion powder _11max Then, according to the formulas (10) and (14), the autoignition powder at the autoignition temperature T can be obtained ₁₁ At constant temperature heating, and the time delta t required for spontaneous combustion ₁₁ The maximum value of (d) is:

(formula 15)

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

(formula 16)

From (equation 16), the amount of heat Δ Q absorbed by the heat conductive film can be derived ₁₂ Minimum value of (a) Q _12min ：

(formula 17)

Step S413, according to the heat quantity delta Q absorbed by the inner wall of the firebox _{Wall of fire transfer chamber} And obtaining the heat quantity delta Q absorbed by the heat-conducting film ₁₂ Obtaining 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 _1-2 Obtaining the heat Q generated by the thermosensitive wire _1-1 。

In particular, the heat Q generated by the heat-sensitive wire _1-1 Comprises the following steps:

(formula 18)

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

(formula 19)

S223, providing total heat Q according to the need of the fire transfer chamber _{Fire transfer chamber} And heat Q generated by the heat-sensitive wire _1-1 Obtaining the mass M of the transfer powder ₁₃ And heat quantity q ₁₃ 。

Specifically, according to (formula 7):

(formula 20)

Wherein M is ₁₃ Mass (kg) of transfer charge inside the transfer chamber, q ₁₃ The 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 _1-1 The mass M of the transfer charge in the transfer chamber can be obtained ₁₃ And heat value q of transfer charge ₁₃ . 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 possible ₁₂ The 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 combustion ₁₁ 。

In particular, the heat Q generated by combustion of the propellant ₁₁ Comprises the following steps:

(formula 21)

Wherein M is ₁₁ Is the mass (g), q, of autoignition gunpowder ₁₁ The calorific value (J/g) of the autoignition powder is shown.

Step S232, obtaining the burning time t of the autoignition gunpowder ₁₁ 。

Specifically, the time t for the self-ignition powder to burn ₁₁ Comprises the following steps:

(formula 22)

Wherein, V ₁₁ The combustion speed (g/s) of the autoignition powder is shown.

Step S233, obtaining andthe heat quantity delta Q required by igniting the gas generating agent per unit volume contacted by the self-ignition gunpowder ₁₀ 。

Specifically, the heat quantity delta Q required by igniting the gas generating agent in unit volume in contact with the spontaneous combustion gunpowder ₁₀ Comprises the following steps:

(formula 23)

Wherein, K _11-10 Efficiency of heat absorption by gas-generating agent per unit volume, Q, for heat generated by self-igniting gunpowder ₁₁ Is 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 gunpowder ₁₀ Time Δ t used ₁₀ 。

(formula 24)

Wherein λ is ₁₀ Is the thermal conductivity (W/(m.K)) of the gas-generating agent ₁₀ Is the cross-sectional area (m) of gas generating agent ² )，T ₁₀ The 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 medicament ₁₀ Is the thickness (m) of the gas generating agent.

Step S235, according to the burning time t of the spontaneous ignition powder ₁₁ >Spontaneous combustion temperature T of gas producing agent per unit volume in contact with spontaneous combustion gunpowder ₁₀ Time Δ t used ₁₀ Determining the minimum mass M of the autoignition charge _11min 。

In particular, the time t for the self-igniting charge to burn ₁₁ >Spontaneous combustion temperature T of gas producing agent per unit volume in contact with spontaneous combustion gunpowder ₁₀ Time Δ t used ₁₀ Is the condition for stable ignition of the gas generating agent. Combining (equation 22) and (equation 24) according to this condition can yield:

(formula 25)

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

(formula 26)

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 agent ₁₀ Comprises the following steps:

(formula 27)

Wherein M is ₁₀ Is the mass (g), q of gas-generating agent ₁₀ Is 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:

(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:

(formula 29)

Wherein, W _Piston Is in an initial stateThe gas generated by the combustion of the lower gas-producing agent 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 C ₁ / C ₂ .. C _n The mass fraction of each component is P ₁ / P ₂ ..P _n Then, the specific heat capacity of the mixed gas can be calculated as follows:

and P is ₁ + P ₂ +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} ：

(formula 30)

Wherein, C _{Gas mixture} 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.

And 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:

(formula 31)

Wherein n is _{Gas mixture} 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 body ³ ）。

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

(formula 32)

Wherein S is _Piston Is the cross-sectional area (m) of the piston ³ ) 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), in this order, one can obtain:

(formula 33)

Step S242, thrust F generated by gas required for the piston to move to the bottom of the cylinder _{Qi (Qi)} Resistance f not less than final position of piston _Piston Determining the mass M of the gas-generating agent ₁₀ And heat value q ₁₀ 。

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 greater than or equal to the final position of the piston _Piston Is the condition in which the piston is pushed to the bottom of the cylinder. Combining (formula 33) according to this condition can yield:

(formula 34)

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

(formula 35)

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 releaseFlow rate Q when discharging liquid fire extinguishing agent from discharge 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 for spraying liquid} Comprises the following steps:

(formula 36)

Wherein S is _{Nozzle with a nozzle body} To release the cross-sectional area (m 2), 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 (1)} Specifically, steps S611 to S615 may be included:

step S611, acquiring the time t of the combustion of the thermosensitive wire outside the combustion chamber ₁ 。

Specifically, the heat-sensitive wire burns outside the fire box for a time t ₁ Must be less than the system set point and this value will also be used to calculate the total fire extinguishing apparatus activation time, i.e. the time t from the beginning to the end of the discharge of the liquid extinguishing agent from the release valve _{Spray assembly} . The burning time t of the heat-sensitive wire outside the fire transfer chamber ₁ Comprises the following steps:

(formula 37)

Wherein, t ₀ Sensing the trigger time (S), S for a thermal wire trigger head _1-1 The length (m), V, of the heat-sensitive wire outside the heat transfer chamber ₁ The 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 burned within 3ms to 5ms, the maximum can be tested by a pressure sensor, for example, in a closed containerPressure P _max The 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 powder ₁₃ Time Δ t used ₁₃ 。

Step S613, acquiring the highest temperature T reached by the contact surface of the heat-conducting membrane and the spontaneous combustion gunpowder _12-2 Time 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 _12-2 Time Δ t used _12-2 And 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 chamber ₁ 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 _12-2 Time Δ t used _12-2 The time t from the start of combustion of the gas generating agent to the pushing of the piston _10-1 Obtaining the time t from the beginning to the end of the spraying of the liquid 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:

(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 discharge 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 for spraying liquid} Whether the quality of the gas-producing medicament is met or not, if not, the quality M of the gas-producing medicament is judged to be met ₁₀ And (6) correcting.

Specifically, the time t from the start to the end of the discharge of the liquid extinguishing agent from the release valve may be individually given _{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 (1)} And the flow rate Q at the time of the discharge of the liquid extinguishing agent from the relief valve _{Nozzle for spraying liquid} 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 fire extinguishing system is triggered 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 discharge valve discharges 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 is ₁₀ And 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 for spraying liquid} (ii) a Obtaining the movement velocity V of the piston _Piston And according to the speed V of movement of the piston _Piston And 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 for spraying liquid} Comprises the following steps:

(formula 39)

Wherein, V _{Volume of liquid discharge} Volume of liquid extinguishing agent sprayed after piston pushes to bottom of cylinder body, V _Piston Is the speed of movement of the piston.

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

(formula 40)

Speed of movement V of piston _Piston Can 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 thermal wire according to the 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 an 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.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure 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, and these are all 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 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 top of the fire transfer chamber is also provided with a heat-resistant clapboard;

the combustion chamber is connected with the fire transfer chamber, and a heat conduction membrane, spontaneous combustion gunpowder and gas generating agent are sequentially arranged in the combustion chamber in a contact manner; wherein the heat conducting membrane is in direct contact with the transfer charge; and (c) a second step of,

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; a gas generator filter screen is arranged between the cylinder body and the combustion chamber;

the method comprises the following steps:

obtaining parameters of the gas production medicament according to the condition that the piston is pushed to the bottom of the cylinder body;

the obtaining of the parameters of the thermosensitive wire according to the condition that the transfer charge is stably ignited comprises:

obtaining the heat quantity delta Q required by the ignition of the transfer charge per unit volume in contact with the thermosensitive wire ₁₃ ；

According to the amount of heat required for igniting the transfer charge per unit volume in contact with the heat-sensitive wireΔQ ₁₃ Obtaining the spontaneous combustion temperature T of the transfer charge reaching the transfer charge ₁₃ Time Δ t used ₁₃ ；

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 charge ₁₃ Time Δ t used ₁₃ The condition for stable ignition of the transfer charge;

the obtaining of the parameters of the transfer charge according to the stable ignition condition of the autoignition charge comprises:

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

According to the spontaneous combustion temperature T of the spontaneous combustion gunpowder ₁₁ The above time (. DELTA.t) _12-2 -Δt _12-1 ) Greater than said autoignition temperature T of said autoignition charge ₁₁ At constant temperature heating, and the time delta t required for spontaneous combustion ₁₁ Determining the amount of heat absorbed by the thermally conductive diaphragm, Δ Q ₁₂ Minimum value of (a) Q _12min ；

Wherein the self-ignition gunpowderHas an autoignition temperature of T ₁₁ Said autoignition powder is at the autoignition temperature T of said autoignition powder ₁₁ The above time (. DELTA.t) _12-2 -Δt _12-1 ) Greater than said autoignition temperature T of said autoignition charge ₁₁ At constant temperature heating, and the time delta t required for spontaneous combustion ₁₁ The condition for stable ignition of the autoignition gunpowder is set;

according to the heat quantity delta Q absorbed by the inner wall of the fire transfer chamber _{Fire transfer chamber wall} And acquiring the heat quantity delta Q absorbed by the heat-conducting membrane ₁₂ Obtaining the total heat Q required to be provided by the flame transfer chamber _{Fire transfer chamber} ；

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 _1-1 Obtaining the mass M of the transfer charge ₁₃ And heat quantity q ₁₃ ；

The parameters for obtaining the self-ignition gunpowder according to the stable ignition condition of the gas generating agent comprise:

Obtaining the heat quantity delta Q required by igniting the gas generating agent per unit volume in contact with the spontaneous combustion gunpowder ₁₀ ；

Wherein the time t of combustion of the self-ignition gunpowder ₁₁ >The spontaneous combustion temperature T of the gas generating agent in unit volume in contact with the spontaneous combustion gunpowder ₁₀ When used, theTime delta t ₁₀ The condition of stable ignition of the gas generating agent is adopted.

2. 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:

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 _Piston Is the condition in which the piston is pushed to the bottom of the cylinder.

3. The method of claim 1 or 2, further comprising:

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 (1)} 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 met ₁₀ And (6) correcting.

4. The method of claim 3, wherein said obtaining said liquid fire extinguishing agent begins to spray out of said release valve to endTime t of _{General assembly} The method comprises the following steps:

Acquiring the time t required by the transfer charge to generate the maximum heat _{Combustion chamber} ；

According to the time t from the beginning to the end of the liquid extinguishing agent spraying from the release valve _{Spray assembly} Time t of combustion of the heat-sensitive wire outside the combustion chamber ₁ The 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 _12-2 Time Δ t used _12-2 The time t from the start of combustion of the gas generating agent to the pushing of the piston is used _10-1 Obtaining the time t from the beginning to the end of the spraying of the liquid fire extinguishing agent from the release valve _{General assembly} 。

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

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 ；

6. A calculation device of parameters of a fire extinguishing system for parameters of a fire extinguishing system, characterized in that the calculation device of parameters is used for performing the method according to any one of claims 1 to 5; the fire suppression system includes:

the combustion chamber is connected with the fire transfer chamber, and a heat conduction membrane, spontaneous combustion gunpowder and gas generating agent are sequentially arranged in the combustion chamber in a contact manner; wherein the heat conducting membrane is in direct contact with the transfer charge; and the number of the first and second groups,

the device comprises:

the first calculation module is used for obtaining parameters of the thermosensitive wire according to the stable ignition condition of the transfer charge;

7. 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 1-5.