CN102921133A - Dry powder fire extinguishing method - Google Patents
Dry powder fire extinguishing method Download PDFInfo
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- CN102921133A CN102921133A CN2011102290005A CN201110229000A CN102921133A CN 102921133 A CN102921133 A CN 102921133A CN 2011102290005 A CN2011102290005 A CN 2011102290005A CN 201110229000 A CN201110229000 A CN 201110229000A CN 102921133 A CN102921133 A CN 102921133A
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- fire extinguishing
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- dry powder
- locking assembly
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Abstract
The invention belongs to the fire-fighting field, and relates to a dry powder fire extinguishing method. A device for realizing the dry powder fire extinguishing method comprises a gas and powder mixture of fire-extinguishing dry powder and a passivation gas, wherein the gas and powder mixture can open the locking assembly of a fire extinguishing module under the action of a pressure and is released to a protection object or a protection surface through the discharge port of the fire extinguishing module without hindrances. The method is characterized in that the flow intensity of the gas and powder mixture, which is obtained through calculating according to an expression formula of KV1/ST1, is not less than 900L/s.m<2>; the inflation speed V of the gas and powder mixture, which is obtained through calculating according to an expression formula KV1/T2, is not less than 0.9L/s; K in the above formulas is a coefficient having a value equal to the opening pressure value of the locking assembly; V1 is the volume (L) of the fire-extinguishing dry powder; S is the area (m<2>) of the discharge port of the fire extinguishing module; T1 is the gas and powder mixture release time (s) of the fire extinguishing module; and T2 is the time (s) from the moment at which the pressure source of the fire extinguishing module starts to run to the moment at which the locking assembly opens. A technical problem that the best effects of high faultless work probability, good fire extinguishing stability and less residual dry powder can be obtained when the dry powder fire extinguishing module works on what parameters indexes is solved.
Description
Technical field:
The invention belongs to fire-fighting domain, especially about using the method for dry powder extinguishing installation.
Background technology:
Being widely used at present the automatic dry chemical extinguishing device---dry powder fire extinguishing module (M ∏ ∏), No. 2336920 " dry powder fire extinguishing module " patents of the Russian Federation propose its primary mixture mass flow second and the ratio that generates gas volume will to be remained in 0.05～0.1 the scope.But in the situation of supply certain volume dry powder and primary mixture, flow should represent rather than mass unit with volume unit.Therefore this ratio has lost use value.
And for example, the supply rate that No. 2254156 patents of the Russian Federation propose fire-fighting powder should surpass the fire hazard thermal Flow Velocity, but it does not consider the rise time of primary mixture, can not obtain the optimal parameter of extinguishing property, guarantees service life.
In addition, No. 0483901, European patent EP is 99.5% for the dry powder filling rate that improves fire-fighting efficiency and propose in the fire extinguisher housing, and in fact so high filling rate will have the part fire-fighting powder to remain in not participate in fire extinguishing procedure in the housing.
For this reason, determine to guarantee that stable extinguishing ability and dry powder discharges complete optimal parameter as far as possible, be still the task of top priority of current fire suppression module design.
Summary of the invention:
The object of the present invention is to provide a kind of dry chemical extinguishing method, solve dry powder fire extinguishing module and under which type of parameter index, work, can obtain that the no-failure operation probability is high, the technical problem of fire extinguishing good stability, optimum efficiency that residue dry powder is few.
The technical scheme in the invention for solving the above technical problem is:
A kind of dry chemical extinguishing method; the primary mixture that comprises fire-fighting powder and passivation gas; this primary mixture guarantees under pressure to open the locking assembly of fire suppression module and unhinderedly is discharged into object of protection or protection surface by the fire suppression module floss hole, and it is held to levy and is: by expression formula KV
1/ ST
1The primary mixture flow strength I that calculates should be not less than 900 liters of/second rice
2, by expression formula KV
1/ T
2The primary mixture aeration speed V that calculates should be not less than 0.9 liter/second, and the K in the above-mentioned expression formula is the coefficient that equates with locking assembly opening pressure value, V
1Be the volume (liter) of fire-fighting powder, S is fire suppression module floss hole area (rice
2), T
1Finish the time (second) of release from fire suppression module for primary mixture, T
2The moment (second) of opening for when the pressure source of fire suppression module is started working, being carved into locking assembly.
The present invention has following useful effect:
1. use the fire suppression module of this dry chemical extinguishing method can obtain maximum extinguishing ability.
2. but calculated in advance can guarantee the running parameter of module trouble free service.
3. reduce the work inertia of module.
4. reach the best ventilation degree of fire-fighting powder.
5. the dry powder surplus is minimum.
Description of drawings:
Table 1 is the result who only presses different parameters value test in the primary mixture flow strength I expression formula.
Table 2 is the result of the test of pressing each parameter in the primary mixture aeration speed expression formula under the corresponding primary mixture flow strength of table 1 condition.
The specific embodiment:
Dry chemical extinguishing method of the present invention is used has gas generator as pressure source, and is filled with the dry powder fire extinguishing module of fire-fighting powder, for example pulsed fire suppression module (M ∏ ∏).This gas generator is gas radial flow dynamic formula or gas axial flow dynamic formula.Be provided with certain thickness metallic membrane or plastic film as locking assembly at this dry powder fire extinguishing module floss hole.
Gas generator in dry powder fire extinguishing module is accepted enabling signal and is begun to produce passivation gas, this passivation gas and fire-fighting powder generate primary mixture, and this primary mixture sprays primary mixture on fire extinguishing face from floss hole after constantly rising to the locking assembly of opening the floss hole place with its pressure of increase of passivation gas.From above-mentioned process as seen, the fire extinguishing effect that speed V and the floss hole primary mixture flow strength I of primary mixture inflation has been determined dry powder fire extinguishing module.And this floss hole primary mixture flow strength I is relevant with volume, floss hole area, the time of pressure, dry powder with primary mixture aeration speed V, and they should disclose therebetween relation with following expression formula:
I=KV
1/ ST
1Rise/second square metre (1)
V=KV
1/ T
2Rise/second (2)
K is the numerical value nondimensional coefficient identical with the force value of opening locking assembly (referring to the engineering pressure value) in the above-mentioned expression formula, V
1Be the shared volume of fire-fighting powder (liter), S be module discharging open area (square metre), T
1Be the time (second) of primary mixture from the module outflow, T
2Open the time (second) constantly for when pressure source is started working, being carved into locking assembly.
When I is not less than 900 liters of/second rice
2Be not less than under 0.9 liter/second the condition with V, dry powder extinguisher can obtain satisfied effect.
Table 1 is for only using the result of each parameter experiment in the primary mixture flow strength I expression formula of the present invention by the test method of Russian national standard Γ OCT53286-2009 regulation with " Blang (Ъ у р а Н)-0.5 " and " Blang-8 " two kinds of dry powder extinguishing installations, as seen from the table, as long as I 〉=900 liter/second rice
2The time (from illustration 3 to 6 illustrations 8 to 16) can obtain the fire extinguishing stability, table 2 is the result of the test of pressing each parameter of primary mixture aeration speed V expression formula under the identical primary mixture flow strength of table 1 I condition, from table 2 illustration 4～6, as seen illustration 8～15 only has fully the I that observes the present invention's regulation 〉=0.9 liter/second rice
2And V 〉=900 liter/second rice
2Dry chemical extinguishing method could obtain that the no-failure operation probability is high, fire extinguishing good stability, residue dry powder few optimum efficiency.
Claims (4)
1. dry chemical extinguishing method; the primary mixture that comprises fire-fighting powder and passivation gas; this primary mixture guarantees under pressure to open the locking assembly of fire suppression module and unhinderedly is discharged into object of protection or protection surface by the fire suppression module floss hole, and it is held to levy and is: by expression formula KV
1/ ST
1The primary mixture flow strength I that calculates should be not less than 900 liters of/second rice
2, by expression formula KV
1/ T
2The primary mixture aeration speed V that calculates should be not less than 0.9 liter/second, and the K in the above-mentioned expression formula is the coefficient that equates with locking assembly opening pressure value, V
1Be the volume (liter) of fire-fighting powder, S is fire suppression module floss hole area (rice
2), T
1Finish the time (second) of release from fire suppression module for primary mixture, T
2The moment (second) of opening for when the pressure source of fire suppression module is started working, being carved into locking assembly.
2. dry chemical extinguishing method according to claim 1, it is characterized in that: this locking assembly is metallic membrane or plastic film.
3. dry chemical extinguishing method according to claim 1, it is characterized in that: pressure source is gas generator.
4. dry chemical extinguishing method according to claim 3, it is characterized in that: gas generator is gas radial flow dynamic formula or gas axial flow dynamic formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102290005A CN102921133A (en) | 2011-08-10 | 2011-08-10 | Dry powder fire extinguishing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102290005A CN102921133A (en) | 2011-08-10 | 2011-08-10 | Dry powder fire extinguishing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102921133A true CN102921133A (en) | 2013-02-13 |
Family
ID=47636144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102290005A Pending CN102921133A (en) | 2011-08-10 | 2011-08-10 | Dry powder fire extinguishing method |
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| CN (1) | CN102921133A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0483901B1 (en) * | 1990-10-30 | 1995-10-04 | Benigno Garcia Calvo | Fire prevention and extinguishing device |
| RU2254156C1 (en) * | 2004-06-22 | 2005-06-20 | Казанцев Владимир Георгиевич | Powder fire extinguishing method and device |
| RU2336920C2 (en) * | 2006-11-16 | 2008-10-27 | Закрытое акционерное общество "Источник Плюс" | Module of dry chemical fire fighting |
| CN201510670U (en) * | 2009-10-15 | 2010-06-23 | 上海埃波托斯消防装备有限公司 | Dry powder fire extinguishing module |
-
2011
- 2011-08-10 CN CN2011102290005A patent/CN102921133A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0483901B1 (en) * | 1990-10-30 | 1995-10-04 | Benigno Garcia Calvo | Fire prevention and extinguishing device |
| RU2254156C1 (en) * | 2004-06-22 | 2005-06-20 | Казанцев Владимир Георгиевич | Powder fire extinguishing method and device |
| RU2336920C2 (en) * | 2006-11-16 | 2008-10-27 | Закрытое акционерное общество "Источник Плюс" | Module of dry chemical fire fighting |
| CN201510670U (en) * | 2009-10-15 | 2010-06-23 | 上海埃波托斯消防装备有限公司 | Dry powder fire extinguishing module |
Non-Patent Citations (5)
| Title |
|---|
| 吴颐伦等: "磷酸铵盐干粉灭火剂灭火性能的计算比较", 《消防技术与产品信息》 * |
| 朱立强等: "干粉炮灭火系统的设计探讨", 《消防科学与技术》 * |
| 杨琦等: "脉冲超细干粉灭火技术在建筑防火设计中的应用", 《消防科学与技术》 * |
| 钱恒宽: "干粉灭火装置的设计思考", 《消防科学与技术》 * |
| 魏德洲等: "干粉灭火系统计算研究", 《工业用水与废水》 * |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130213 |