CN114849120A - External pressure storage pipe network type superfine dry powder extinguishing device and using method thereof - Google Patents
External pressure storage pipe network type superfine dry powder extinguishing device and using method thereof Download PDFInfo
- Publication number
- CN114849120A CN114849120A CN202210630404.3A CN202210630404A CN114849120A CN 114849120 A CN114849120 A CN 114849120A CN 202210630404 A CN202210630404 A CN 202210630404A CN 114849120 A CN114849120 A CN 114849120A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- powder
- gas supply
- dry powder
- superfine dry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/005—Delivery of fire-extinguishing material using nozzles
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
An external pressure storage pipe network type superfine dry powder extinguishing device and a using method thereof. The device comprises a driving gas cylinder, a powder tank, a main gas supply pipeline, first to fourth electromagnetic valves, an upper gas supply branch pipeline, first to second pressure reducing valves, a time delay device, an automatic fire alarm and fire extinguishing controller, a powder conveying pipeline, a lower gas supply branch pipeline, an annular pipeline and a pressure sensor; the invention has the advantages that: the superfine dry powder extinguishing agent in the powder tank is loosened through airflow stirring, so that the superfine dry powder extinguishing agent is prevented from locally agglomerating, and the flowability of the superfine dry powder extinguishing agent is increased. The superfine dry powder extinguishing agent is uniformly dispersed in the driving gas by the combined action of the upper pressurization and the lower stirring, so that a stable gas-solid two-phase flow is formed in the powder conveying pipeline. The fire extinguishing device is simple and safe to operate, low in use cost and high in fire extinguishing efficiency, and is suitable for various public places such as equipment rooms, cable tunnels, file rooms, gas stations, transformer substations and airport terminals. Can spray uniformly dispersed superfine dry powder extinguishing agent.
Description
Technical Field
The invention belongs to the technical field of fire-fighting extinguishing devices, and particularly relates to an external pressure storage pipe network type superfine dry powder extinguishing device and a using method thereof.
Background
As a traditional fire extinguishing material, the dry powder fire extinguishing agent has the characteristics of high fire extinguishing speed, wide sources of dry powder base materials, low price, no toxicity or low toxicity to people and livestock, safety, good electrical insulation performance, wide application range and the like, thereby occupying a very important position in the field of the current fire extinguishing agents. However, the common dry powder fire extinguishing agent generally has the powder particles of 10-75 μm, the dispersibility of the particles is relatively poor, the specific surface area is relatively low, the mass of a single particle is large, the precipitation speed is high, the rate of thermal decomposition of the particles is low, the fire extinguishing capability is limited, the re-ignition resistance is poor, the environment is easily polluted by using a large amount of the particles, and the application range of the common dry powder fire extinguishing agent is greatly limited. The 90% superfine dry powder fire extinguishing agent with the particle size less than or equal to 20 mu m has the characteristics of large specific surface area, high activity, good dispersion performance, long suspension time and the like because the particle size is much smaller than that of common dry powder, can quickly decompose and capture active free radicals in flame after heating, quickly inhibit the flame, bypass barriers and spread to the whole fire area in a short time, improve the fire extinguishing efficiency, realize full-submerged fire extinguishing, form a uniform glass-shaped covering layer on the surface of combustible after fire extinguishing, and have good re-combustion resistance.
The superfine dry powder extinguishing agent is particularly suitable for total flooding application, replaces expensive gas extinguishing agent, but is easy to agglomerate and absorb moisture, a local agglomeration phenomenon can occur when the superfine dry powder extinguishing agent is stored in an extinguishing agent tank for a long time, and when a fire accident happens and a superfine dry powder extinguishing system is started, if the extinguishing agent is locally agglomerated, the spraying stability and the fire extinguishing effect of the extinguishing agent can be influenced, the fire extinguishing efficiency is reduced, and even a fire extinguishing agent conveying pipeline is blocked, so that the fire extinguishing failure is caused.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an external pressure storage pipe network type superfine dry powder fire extinguishing device and a using method thereof.
In order to achieve the purpose, the external pressure storage pipe network type superfine dry powder fire extinguishing device provided by the invention comprises a driving gas cylinder, a powder tank, a main gas supply pipeline, a first electromagnetic valve, a second electromagnetic valve, a fourth electromagnetic valve, an upper gas supply branch pipeline, a first pressure reducing valve, a second pressure reducing valve, a time delay device, an automatic fire alarm fire extinguishing controller, a powder conveying pipeline, a lower gas supply branch pipeline, an annular pipeline and a pressure sensor; wherein, the powder tank is filled with superfine dry powder extinguishing agent; the powder conveying pipeline is in an inverted L shape, the lower part of the powder conveying pipeline is inserted into the powder tank, the lower end of the powder conveying pipeline is provided with a powder inlet, and the upper end of the powder conveying pipeline is provided with a spray head; the fourth electromagnetic valve is arranged at the upper part of the powder conveying pipeline and is electrically connected with the pressure sensor, and the pressure sensor controls the fourth electromagnetic valve to be opened and closed;
the driving gas is stored in the driving gas cylinder; one end of the main gas supply pipeline is connected to the upper end of the driving gas cylinder, and the other end of the main gas supply pipeline is connected with one end of the upper gas supply branch pipeline and one end of the lower gas supply branch pipeline; the other end of the upper air supply branch pipeline is connected to the upper part of the powder tank; the other end of the lower air supply branch pipeline is connected with an annular pipeline; the annular pipeline surrounds the outer side of the lower part of the powder tank, the middle part of the annular pipeline is connected with a plurality of radial branch pipes which are positioned at the inner side, and the inner ends of the branch pipes penetrate through the side wall of the powder tank and then are positioned at the inner bottom of the powder tank; the first electromagnetic valve is arranged on the gas supply main pipeline; the third electromagnetic valve and the second pressure reducing valve are arranged on the upper air supply branch pipeline; the second electromagnetic valve and the first pressure reducing valve are arranged on the lower air supply branch pipeline; the fire automatic alarm fire-extinguishing controller is respectively electrically connected with the first electromagnetic valve and the second electromagnetic valve, and is simultaneously electrically connected with the third electromagnetic valve through the delayer.
An emergency stop button is arranged on the automatic fire alarm and extinguishing controller.
The powder inlet is a horn mouth with an opening angle of 20 degrees.
The side surface of the branch pipe is provided with a plurality of exhaust air holes, the distance between the air holes is 3-5mm, and the aperture is 3-5 mm.
And a pressure gauge is also arranged on the gas supply main pipeline.
The use method of the external pressure storage pipe network type superfine dry powder extinguishing device provided by the invention comprises the following steps in sequence:
1) after the alarm occurs, the first and second electromagnetic valves on the main gas supply pipeline and the lower gas supply branch pipeline are opened under the control of the automatic fire alarm and fire extinguishing controller, and then the driving gas in the driving gas cylinder flows into the powder tank from the bottom of the powder tank through the main gas supply pipeline, the lower gas supply branch pipeline, the annular pipeline, the inner ports of the branch pipes and the gas holes in sequence and is used for stirring the superfine dry powder extinguishing agent to prevent agglomeration and pressurizing the powder tank so that the pressure of the powder tank is close to the spraying pressure;
2) after the driving gas from the lower gas supply branch pipeline stirs the superfine dry powder extinguishing agent, a third electromagnetic valve on the upper gas supply branch pipeline is started through a time delay according to the designed spraying delay time (less than or equal to 30s), and the driving gas enters the upper part of the powder tank through the upper gas supply branch pipeline to pressurize the powder tank;
3) after the pressure sensor detects that the pressure of the powder tank reaches the discharge pressure, the fourth electromagnetic valve is opened, so that the superfine dry powder extinguishing agent is sprayed out from the powder inlet to the nozzle through the powder conveying pipeline, and fire is extinguished;
4) if a fire alarm and a false alarm are found, the emergency stop button is manually pressed within the delay time so as to prevent the superfine dry powder extinguishing agent from being sprayed by mistake.
Before use, the first pressure reducing valve and the second pressure reducing valve are used to control the air supply pressure in the lower air supply branch pipeline (19) to be slightly lower than the air supply pressure in the upper air supply branch pipeline.
The external pressure storage pipe network type superfine dry powder extinguishing device and the using method provided by the invention have the following advantages:
1. the superfine dry powder extinguishing agent in the powder tank is loosened through airflow stirring, so that the superfine dry powder extinguishing agent is prevented from locally agglomerating, and the flowability of the superfine dry powder extinguishing agent is increased.
2. The superfine dry powder extinguishing agent is uniformly dispersed in the driving gas by the combined action of the upper pressurization and the lower stirring, so that a stable gas-solid two-phase flow is formed in the powder conveying pipeline.
3. The fire extinguishing device is simple and safe to operate, low in use cost and high in fire extinguishing efficiency, and is suitable for various public places such as equipment rooms, cable tunnels, archive rooms, gas stations, transformer substations and airport terminals.
4. Can spray uniformly dispersed superfine dry powder extinguishing agent.
Drawings
FIG. 1 is a schematic structural view of an external pressure storage pipe network type superfine dry powder fire extinguishing device provided by the invention.
FIG. 2 is a schematic diagram of a ring pipeline and branch pipes in the external pressure storage pipe network type superfine dry powder fire extinguishing device provided by the invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1-2, the external pressure storage pipe network type superfine dry powder fire extinguishing apparatus provided by the present invention comprises a driving gas cylinder 1, a powder tank 2, a main gas supply pipeline 4, first to fourth solenoid valves 5 to 8, an upper gas supply branch pipeline 10, first to second pressure reducing valves 13 to 14, a time delay 15, an automatic fire alarm fire extinguishing controller 16, a powder conveying pipeline 18, a lower gas supply branch pipeline 19, an annular pipeline 20 and a pressure sensor 21; wherein, the powder tank 2 is filled with a superfine dry powder extinguishing agent 12; the powder conveying pipeline 18 is in an inverted L shape, the lower part of the powder conveying pipeline is inserted into the powder tank 2, the lower end of the powder conveying pipeline is provided with a powder inlet 11, and the upper end of the powder conveying pipeline is provided with a spray head 9; the fourth electromagnetic valve 8 is arranged at the upper part of the powder conveying pipeline 18 and is electrically connected with the pressure sensor 21, and the pressure sensor 21 controls the opening and closing of the fourth electromagnetic valve 8;
the driving gas is stored in the driving gas bottle 1; one end of the main gas supply pipeline 4 is connected with the upper end of the driving gas bottle 1, and the other end is simultaneously connected with one end of the upper gas supply branch pipeline 10 and one end of the lower gas supply branch pipeline 19; the other end of the upper gas supply branch pipeline 10 is connected to the upper part of the powder tank 2; the other end of the lower air supply branch pipe 19 is connected with a ring pipe 20; the annular pipeline 20 surrounds the outer side of the lower part of the powder tank 2, the middle part of the annular pipeline is connected with a plurality of radial branch pipes 23 which are positioned at the inner side, and the inner ends of the branch pipes 23 penetrate through the side wall of the powder tank 2 and then are positioned at the inner bottom of the powder tank 2; the first electromagnetic valve 5 is arranged on the main gas supply pipeline 4; the third electromagnetic valve 7 and the second reducing valve 14 are respectively installed on the upper air supply branch pipeline 10; the second solenoid valve 6 and the first pressure reducing valve 13 are installed on the lower air supply branch line 19; the fire automatic alarm and fire extinguishing controller 16 is respectively electrically connected with the first electromagnetic valve 5 and the second electromagnetic valve 6, and is also electrically connected with the third electromagnetic valve 7 through the time delay device 15.
An emergency stop button 17 is arranged on the automatic fire alarm and fire extinguishing controller 16.
The powder inlet 11 is a horn mouth with an opening angle of 20 degrees.
The side surface of the branch pipe 23 is provided with a plurality of exhaust air holes 22, the distance between the air holes 22 is 3-5mm, and the aperture is 3-5 mm.
And the gas supply main pipeline 4 is also provided with a pressure gauge 3.
The use method of the external pressure storage pipe network type superfine dry powder extinguishing device provided by the invention comprises the following steps in sequence:
1) after the alarm occurs, the first and second electromagnetic valves 5 and 6 on the main gas supply pipeline 4 and the lower gas supply branch pipeline 19 are opened under the control of the automatic fire alarm and fire extinguishing controller 16, at this time, the driving gas in the driving gas cylinder 1 flows into the powder tank 2 from the bottom of the powder tank 2 through the main gas supply pipeline 4, the lower gas supply branch pipeline 19, the annular pipeline 20, the inner port of the branch pipe 23 and the air hole 22 in sequence, and is used for stirring the superfine dry powder extinguishing agent 12 to prevent agglomeration and pressurizing the powder tank 2, so that the pressure of the powder tank 2 is close to the spraying pressure;
2) after the driving gas from the lower gas supply branch pipeline 19 stirs the superfine dry powder extinguishing agent 12, the third electromagnetic valve 7 on the upper gas supply branch pipeline 10 is started through the time delay device 15 according to the designed spraying delay time (less than or equal to 30s), and then the driving gas enters the upper part of the powder tank 2 through the upper gas supply branch pipeline 10 to pressurize the powder tank 2;
3) after the pressure sensor 21 detects that the pressure of the powder tank 2 reaches the discharge pressure, the fourth electromagnetic valve 8 is opened, so that the superfine dry powder extinguishing agent 12 is sprayed out from the powder inlet 11 to the nozzle 9 through the powder conveying pipeline 18, and fire is extinguished;
4) if a fire alarm and false alarm condition is found, the emergency stop button 17 is manually pressed within a delay time to prevent the superfine dry powder extinguishing agent 12 from being sprayed by mistake.
Before use, the first pressure reducing valve 13 and the second pressure reducing valve 14 control the pressure of the air supplied to the lower air supply branch line 19 to be slightly lower than the pressure of the air supplied to the upper air supply branch line 10.
Claims (7)
1. The utility model provides an outer pressure storage pipe network formula superfine dry powder extinguishing device which characterized in that: the external pressure storage pipe network type superfine dry powder fire extinguishing device comprises a driving gas cylinder (1), a powder tank (2), a gas supply main pipeline (4), first to fourth electromagnetic valves (5) - (8), upper gas supply branch pipelines (10), first to second pressure reducing valves (13) - (14), a time delay device (15), a fire automatic alarm fire extinguishing controller (16), a powder conveying pipeline (18), lower gas supply branch pipelines (19), an annular pipeline (20) and a pressure sensor (21); wherein, the powder tank (2) is filled with superfine dry powder fire extinguishing agent (12); the powder conveying pipeline (18) is inverted L-shaped, the lower part of the powder conveying pipeline is inserted into the powder tank (2), the lower end of the powder conveying pipeline is provided with a powder inlet (11), and the upper end of the powder conveying pipeline is provided with a spray head (9); the fourth electromagnetic valve (8) is arranged at the upper part of the powder conveying pipeline (18) and is electrically connected with the pressure sensor (21), and the pressure sensor (21) controls the fourth electromagnetic valve (8) to be opened and closed;
the driving gas is stored in the driving gas bottle (1); one end of the main gas supply pipeline (4) is connected with the upper end of the driving gas cylinder (1), and the other end of the main gas supply pipeline is simultaneously connected with one end of the upper gas supply branch pipeline (10) and one end of the lower gas supply branch pipeline (19); the other end of the upper gas supply branch pipeline (10) is connected with the upper part of the powder tank (2); the other end of the lower air supply branch pipeline (19) is connected with a ring pipeline (20); the annular pipeline (20) surrounds the outer side of the lower part of the powder tank (2), the middle part of the annular pipeline is connected with a plurality of radial branch pipes (23) which are positioned at the inner side, and the inner ends of the branch pipes (23) penetrate through the side wall of the powder tank (2) and then are positioned at the inner bottom of the powder tank (2); the first electromagnetic valve (5) is arranged on the main gas supply pipeline (4); a third electromagnetic valve (7) and a second reducing valve (14) are arranged on the upper air supply branch pipeline (10); the second electromagnetic valve (6) and the first reducing valve (13) are arranged on the lower air supply branch pipeline (19); the fire automatic alarm fire-extinguishing controller (16) is respectively electrically connected with the first electromagnetic valve (5) and the second electromagnetic valve (6), and is also electrically connected with the third electromagnetic valve (7) through the time delay device (15).
2. The external pressure storage tube mesh type superfine dry powder fire extinguishing device according to claim 1, wherein: an emergency stop button (17) is arranged on the fire automatic alarm fire-extinguishing controller (16).
3. The external pressure storage tube mesh type superfine dry powder fire extinguishing device according to claim 1, wherein: the powder inlet (11) is a horn mouth with an opening angle of 20 degrees.
4. The external pressure storage tube mesh type superfine dry powder fire extinguishing device according to claim 1, wherein: the side surface of the branch pipe 23 is provided with a plurality of rows of air holes (22), the distance between the air holes (22) is 3-5mm, and the aperture is 3-5 mm.
5. The external pressure storage tube mesh type superfine dry powder fire extinguishing device according to claim 1, wherein: and the gas supply main pipeline (4) is also provided with a pressure gauge (3).
6. A method for using the external pressure storage pipe network type superfine dry powder fire extinguishing device according to any one of claims 1 to 5, wherein the external pressure storage pipe network type superfine dry powder fire extinguishing device comprises the following steps: the use method comprises the following steps which are carried out in sequence:
1) after alarming, opening a first electromagnetic valve (5) and a second electromagnetic valve (6) on a main gas supply pipeline (4) and a lower gas supply branch pipeline (19) under the control of an automatic fire alarm and fire extinguishing controller (16), wherein driving gas in a driving gas bottle (1) flows into the powder tank (2) from the bottom of the powder tank (2) sequentially through the main gas supply pipeline (4), the lower gas supply branch pipeline (19), an annular pipeline (20), an inner port of a branch pipe (23) and a gas hole (22) and is used for stirring the superfine dry powder extinguishing agent (12) to prevent agglomeration and pressurizing the powder tank (2) so that the pressure of the powder tank (2) is close to the spraying pressure;
2) after the driving gas from the lower gas supply branch pipeline (19) stirs the superfine dry powder extinguishing agent (12), the third electromagnetic valve (7) on the upper gas supply branch pipeline (10) is started through a time delay device (15) according to the designed spraying delay time, and then the driving gas enters the upper part of the powder tank (2) through the upper gas supply branch pipeline (10) to pressurize the powder tank (2);
3) after the pressure sensor (21) detects that the pressure of the powder tank (2) reaches the discharge pressure, the fourth electromagnetic valve (8) is opened, so that the superfine dry powder extinguishing agent (12) is sprayed out from the powder inlet (11) to the nozzle (9) through the powder conveying pipeline (18), and fire is extinguished;
4) if a fire alarm false alarm condition is found, the emergency stop button (17) is manually pressed within a delay time to prevent the superfine dry powder extinguishing agent (12) from being sprayed by mistake.
7. Use according to claim 6, characterized in that: before use, the first pressure reducing valve (13) and the second pressure reducing valve (14) are used to control the air supply pressure in the lower air supply branch pipeline (19) to be slightly lower than the air supply pressure in the upper air supply branch pipeline (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210630404.3A CN114849120A (en) | 2022-06-06 | 2022-06-06 | External pressure storage pipe network type superfine dry powder extinguishing device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210630404.3A CN114849120A (en) | 2022-06-06 | 2022-06-06 | External pressure storage pipe network type superfine dry powder extinguishing device and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114849120A true CN114849120A (en) | 2022-08-05 |
Family
ID=82625232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210630404.3A Pending CN114849120A (en) | 2022-06-06 | 2022-06-06 | External pressure storage pipe network type superfine dry powder extinguishing device and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114849120A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116271664A (en) * | 2023-03-17 | 2023-06-23 | 湖北及安盾消防科技有限公司 | Pressure-storage type perfluorinated hexanone fire extinguishing device capable of being conveniently filled and filling method thereof |
-
2022
- 2022-06-06 CN CN202210630404.3A patent/CN114849120A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116271664A (en) * | 2023-03-17 | 2023-06-23 | 湖北及安盾消防科技有限公司 | Pressure-storage type perfluorinated hexanone fire extinguishing device capable of being conveniently filled and filling method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109513135B (en) | Fire-fighting system and method for energy storage container | |
| CN101066493B (en) | Submerged nitrogen fire extinguishing system for closed space | |
| CN105749449B (en) | A kind of tunnel fire system and extinguishing method | |
| CN102657922A (en) | Nitrogen automatic fire fighting system for sealed cable tunnel | |
| CN114849120A (en) | External pressure storage pipe network type superfine dry powder extinguishing device and using method thereof | |
| CN102824713A (en) | Fire detecting tube-type automatic dry powder extinguishing system | |
| CN113090956A (en) | Partitioned active explosion-proof and explosion-suppression device and control method thereof | |
| CN113144467A (en) | Distributed all-nitrogen fire extinguishing system and method for power cabin of urban underground comprehensive pipe gallery | |
| WO2022053023A1 (en) | Fire extinguishing apparatus for power source, and locomotive | |
| CN109459997B (en) | Combined type power plant fireproof and explosion-proof purging system and control method | |
| CN202136724U (en) | Fire extinguishing system using superfine dry powder as fire extinguishing agent | |
| CN202859971U (en) | Fire trace tube type automatic dry powder fire extinguishing system | |
| CN202223795U (en) | Intelligent pipe network-free cabinet type superfine dry powder fire extinguishing device | |
| CN210644901U (en) | Fire extinguishing device of energy storage box | |
| CN217697726U (en) | External pressure storage pipe network type superfine dry powder extinguishing device | |
| CN201939920U (en) | Water mist fire extinguisher with preheated water | |
| CN1480231A (en) | Method and equipment for fire fighting by using superfine gas-water fog | |
| CN215585304U (en) | Full nitrogen fire extinguishing systems of city utility tunnel electric power cabin distributing type | |
| CN213555020U (en) | Outdoor oil-immersed transformer fire extinguishing systems of electric wire netting | |
| CN113663254A (en) | Acoustic low-pressure water mist fire extinguishing prevention and control device for battery box of energy storage power station | |
| CN206304262U (en) | A kind of foam tank extinguishing device | |
| CN112717304A (en) | Cable pit liquid nitrogen vehicle system of putting out a fire | |
| CN202942577U (en) | GPS (Global Position System) intelligent automatic sprinkler fire extinguishing device | |
| CN201279362Y (en) | Vehicle-loaded superfine mist fire-extinguishing device | |
| CN207253616U (en) | A kind of automatic spraying extinguisher |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |