RU2355450C2 - Method and device for extinguishing flammable and combustible liquids firing in reservoirs - Google Patents

Abstract

FIELD: fire safety.

SUBSTANCE: invention is aimed at fire extinguishing in reservoirs with a fixed cover (SVR) or with a fixed cover and a piston (SVRP) or in reservoirs with a floating roof. Method of extinguishing firing of flammable and combustible liquids in reservoirs by supplying fire extinguishing gas dispersion mixture from fire extinguishing modular unit or units set mounted outside the reservoir or on the floating roof is distinguished by the fact that the fire extinguishing gas dispersion mixture is produced in two steps: first - not less than one fifth of the gaseous and/or liquefied flame retarder or of the mixture of gaseous and/or liquefied phlegmatiser is supplied to a prechamber tank with dispersed heterogenic chemical flame retarder under the pressure of not less than 2.5 MPa, the gaseous and/or liquefied mixture components are fed to the prechamber from a flask or a flask system or a gas generator with turn on/off devices actuated according to the signal from a detector or manually through a tubular aerator mounted inside the prechamber which is opening under the pressure of not less than 0.9 MPa and by an outlet valve is connected to a secondary accelerating-mixing chamber where the gas dispersion mixture is finally formed with the relation of gas and dispersion specified by the invention; second - the gas dispersion mixture is supplied from the accelerating-mixing chamber through pipelines to a nozzle block fitted with a stop valve to open the nozzle block equipped by at least one nozzle which is made with a supersonic convergent tube and with the relation of the nozzle length to its diametre providing for the pressure at the nozzle end of at least 0.11 MPa and mass flow rate of at least 15 kg/s.

EFFECT: invention opens the device for extinguishing flammable and combustible liquid fire in reservoirs in the described way and provides for expanding the temperature application range of gas dispersion method and increasing the fire extinguishing efficiency.

4 cl, 4 dwg, 1 tbl

Description

The invention relates to the field of fire fighting equipment and provides a method and device for extinguishing flammable (LVH) and combustible (GF) liquids in tanks with a fixed roof (RVS), with a fixed roof and a pontoon (RVSP) or in tanks with a floating roof (RVSPK) with using a fire extinguishing gas dispersed mixture.

There is a method of extinguishing burning liquids, which consists in supplying solid carbon dioxide in a fragmented form to the fire with a granule diameter of 3-4 cm. The granules are fed in compact portions under a layer of burning liquid (USSR Author's Certificate No. 1687266 of 10.30.91). The disadvantages of the method of extinguishing burning liquids with solid carbon dioxide include its difficult supply to the burning tank through the unloading process pipelines, the high consumption for extinguishing the source (at least 0.7 kg / m ³ ) and its storage in isothermal tanks.

There is also known a method of gas-powder extinguishing from a powder fire extinguisher, designed for local fire extinguishing, which contains a cannon with fire-extinguishing powder, a gas-generating chamber with an explosive charge and a squib, an automatic control and monitoring system. This fire extinguisher is described in the recommendations of VNIIPO Ministry of Internal Affairs of the Russian Federation of the USSR, 1978, p. 12, 16, 30, Fig. 5 and 4 (2). The disadvantages of this method include:

- increased specific gravity of the device to the weight of its extinguishing charge;

- high pressure (100 MPa) and high temperature (1500-2000 ° C) in the gas generating chamber;

- high pressure (10 MPa) in the body of the fire extinguisher. The complexity of using this method of extinguishing due to the high speed of expiration (up to 250 m / s) of the fire extinguishing composition and its increased danger to staff.

There is a method of extinguishing a fire according to the patent of the Russian Federation No. 2129031 of 08/18/92, which consists in supplying a solid fuel aerosol-forming substance in the form of foam granules or foam cups with a specific gravity of 800 kg / m ³ coated with a waterproofing composition to the burning surface, and the ignition temperature of the composition is 120-140 ° C. According to the invention, the composition is fed manually (bags filled with foam granules are thrown onto the burning surface of the oil tank) or fed through a hose from a car. This method, in our opinion, is practically unrealizable due to the very high risk of supplying a solid fuel or pyrotechnic composition with the above parameters to the surface of a burning tank, especially with a burning surface of 375 m ² . The diameter of the RVS-3000 tank is 21.8 m, and the combustion area is 375 m ² . The flame height in a fire is 1-2 diameters. So, if the flame height is equal to the diameter, i.e. 21.8 m, the flame volume will be 8000 m ³ . According to the description, 24 kg of foam granules with a diameter of 8-10 mm and a density of 600 kg / m ³ will cover only 1% of the burning surface area, and the created aerosol concentration (subject to a composition utilization factor equal to one) will be 24000 g: 8000 m ³ = 3 g / m ³ , while the authors give C _carcasses. = 63 g / m ³ .

If we take into account, as the authors write, that the volume of gases released is 1600 times greater than the volume of foam cups, then the volume of combustion products will be 64 m ³ , which will be 0.8% of the flame volume. Such extinguishing agents with a fire extinguishing concentration of 3 g / m ³ or 0.8% by volume or 24 kg: 375 m ² = 0.064 kg / m ² have not been found to date, therefore, this method of extinguishing is not physically feasible. There is also known a method of extinguishing fires in tanks according to the patent of the Russian Federation No. 2096053 A62C 2/00 of 08/05/94, the essence of which is to burn a solid fuel composition (TTK) and supply the gas-aerosol mixture to the burning surface from the bottom up in a cooled state, and cooling lead in 2 stages. At the first stage, the combustion products of the solid fuel composition are cooled in a pipeline where water or an aqueous solution of salts enters. At the second stage, the remaining (not dissolved, not settled and not condensed in the pipeline) part of the gas-aerosol mixture (GAS) is bubbled through a layer of combustible or flammable liquid to the combustion surface. The specific consumption relative to the burning surface was 0.2 kg / m ² with a combustion area of 1 m ² , a volume of flammable liquids of 0.75 m ³ and a column height of flammable liquids of 0.75 m.

The main disadvantage of this method is the increased flammability (the use of pyrophoric TTK at high fire hazard facilities), thermal pyrolysis of oil and oil products by combustion products, as well as the relatively high consumption of extinguishing agent when sparging a gas-fired gas extinguishing agent in full-scale RCS (vertical steel tanks). For example, the most commonly used in the Russian Federation RVS-5000 with a volume of 5000 m ³ have a mirror diameter of 22.8 m and a column height of the stored liquid 11.92 m. The surface of the mirror is 408 m ² . Hence, for a uniform distribution of the HAS over the RVS-5000 mirror under natural conditions, to the measures additionally described in the patent, it is necessary to use a pipe reamer to bubble the HAS, the diameter d _{o of} the bubbler holes being determined by the formula:

where σ _W is the surface tension coefficient of the combustible liquid;

ρ _g - density of gaseous products of combustion;

H is the height of the liquid column above the bubbler;

P _a - atmospheric pressure;

g is the acceleration of gravity;

and the distance L, m, between the centers of the bubbler holes is found from the ratio:

(see J.E. Geguzin). Bubbles - M .: 1985)

According to experimental data (I.V. Belov, E.V. Prokolov. Speed and shape of air bubbles in water. // ПМТФ, №3, 1968), the speed of ascent of the bubbles is on average u _bel ≈0.23 m / s at d _belly ≥2 mm. Calculations show that the optimal diameter of the bubbler holes is d ₀ = 3 mm, and the distance between the holes is L = 9 mm (see RF patent No. 2126702 A62C 3/06).

Thus, for the fire extinguishing effect in RVS-5000, a bubbler with 50,000 holes is required.

Loss of fire extinguishing aerosol in pipelines and coolers up to 50%, respectively (V.V. Agafonov, NP Kopylov. Aerosol fire extinguishing installations. M: 1999. 302 p.). As a result, in actual conditions, the actual flow rate is 0.8 kg / m ² , while the time for the supply of gas to the surface of the burning liquid, taking into account the operating time of the extinguishing aerosol generator (GOA), will be at least 2 minutes.

A known method of extinguishing a fire in tanks with flammable (LVH) and combustible liquids (GF) according to the patent of the Russian Federation No. 221508, which we have chosen for the prototype. Extinguishing in this method is carried out by feeding a fire extinguishing gas dispersed mixture (GDS) into the combustion zone from the bottom up, and a fire extinguishing GDS is formed by supplying at least 2 MPa a gaseous and / or liquefied gas phlegmatizer and / or a gaseous and / or liquefied homogeneous inhibitor combustion, and / or hydrocarbon-like surfactant (SAS) in a container with a powder or liquid heterogeneous combustion inhibitor, having a valve that allows the release of GDS when the pressure in the tank is not lower than 0.42 kP through a perforated atomizer or through several atomizers providing a 180 ° dispersion of gas discharge with a flow rate of at least 1 kg / s in a direction parallel to the surface of the burning liquid, and into the upper hemisphere above the surface of the above liquid with an intensity that creates a concentration of gas distribution in the center of the flame volume above a mirror of a burning surface of at least 0.09 kg / m ³ , moreover, the mass ratio between the gas and dispersed phases of the extinguishing mixture is in the range from 0.2: 1 to 15: 1. An inert gas (for example, СО ₂ , N ₂ , Ar or a mixture thereof) and / or an ozone-depleting halogen-hydrocarbon is used as the gas component, and a fire extinguishing powder composition based on carbonates and / or chlorides and / or is used as a heterogeneous combustion inhibitor. phosphates of an alkali and / or alkaline earth metal, and / or ammonium or a fog-forming solution of phosphoric acid.

GDS is supplied simultaneously from generators floating on the surface of the liquid located in the tank and located both around the perimeter of the tank and in its center, and the resulting vector of horizontal spray of peripheral generators is directed to the center, and the central ones to the periphery, the resulting vector of spray of peripheral generators in the upper hemisphere is directed to the center of the flame volume, centrally located generators - from the center of the mirror of the burning surface to the periphery at an angle of 90 ° to the above vector.

A device for extinguishing oil in reservoirs is known, comprising a gas-powder injector and / or a gas-liquid injector (foam generator) that pumps into the system of annular and radial pipelines through an OTV start-and-stop device. The pipelines are located in oil horizontally at the bottom of the tank and are connected to a system of vertical pipes, in the upper part of which protrudes above the surface of the oil, nozzle nozzles are located that provide a fire extinguishing agent (OT) in case of fire above the burning surface of the liquid fuel (US Patent No. 5573068 MKI A62C 3 / 06 dated November 12, 1996). This device is selected by us for the prototype of the claimed device.

The disadvantages of this device include the following:

high metal consumption of the device.

, т.е. в нашем случае количество кольцевых трубопроводов будет

, т.е. три кольцевых трубопровода, причем наибольший по радиусу отстоит от внутренней стенки РВС не менее чем на 1 м, т.е. максимальный диаметр кольца составит ≈21 м, средний ≈14 м, а внутренний диаметр ≈7 м. Все три кольца соединены, как минимум, шестью пересекающимися радиальными трубами, т.е. еще 6 труб по 21 м. На пересечениях кольцевых и радиальных труб установлены вертикальные сливные трубы высотой ≈11 м. Это еще 13 труб длиной по 11 м. Таким образом, общая длина трубопроводов составит:Take for example the RVS-5000 tank, which has an oil “mirror” diameter of 22.8 m and a column height of 11.92 m. According to the description of the prototype patent, the number of ring pipelines is determined as

, i.e. in our case, the number of ring pipelines will be

, i.e. three annular pipelines, the largest in radius being at least 1 m from the inner wall of the internal combustion engine, i.e. the maximum diameter of the ring is ≈21 m, the average is ≈14 m, and the inner diameter is ≈7 m. All three rings are connected by at least six intersecting radial tubes, i.e. 6 more pipes of 21 m each. At the intersections of the annular and radial pipes, vertical drain pipes ≈11 m high are installed. These are 13 more pipes of 11 m length. Thus, the total length of the pipelines will be:

L = πД ₁ + πД ₂ + πД ₃ + Д ₁ + 13 · 11m = 66m + 44m + 22m + 126m + 143m = 401 m.

The internal diameter of the pipeline for foam extinguishing is 200 mm, for powder 50 mm. The weight of the foam steel pipe with a wall thickness of 5 mm will be 9.6 tons, for a powder extinguishing system with a wall thickness of 3 mm, the weight of the pipeline alone will be 1.5 tons. The weight of the PBC-1000 extinguishing device will be 2.5 tons.

The aim of the present invention is to expand the temperature range of the gas-dispersed method of extinguishing fires to (-50 ° C) ÷ (+ 50 ° C) instead of (-20 ° C) ÷ (+ 50 ° C) in the prototype), increasing the extinguishing efficiency by increasing the mass flow rate of the gas-dispersed mixture (GDS), its expiration rate, while reducing the metal consumption of the fire extinguishing module.

The problem is solved when implementing the proposed method and device for extinguishing LVZh and GZh in tanks with a fixed roof and in tanks with a fixed roof and a pontoon or with a floating roof, namely, by supplying a fire extinguishing gas-dispersed mixture from a fire extinguishing modular device or unit installed outside tank or on a floating roof. The gas-dispersed extinguishing mixture is formed in two stages:

the first is in a prechamber with a dispersed heterogeneous chemical combustion inhibitor by supplying at least one fifth of a gaseous and / or liquefied combustion inhibitor or a mixture of a gaseous and / or liquefied phlegmatizer with methyl, ethyl, propyl carbinol under a pressure of at least 2.5 MPa or a mixture thereof and / or a 5-20% solution of iodine or iodide of an alkali metal, or ammonium, or a mixture thereof in the aforementioned carbinol solvents, the gaseous and / or liquefied components of the mixture being introduced into the prechamber from a balloon or a score new, or a gas generator with start-up devices at the signal from the detector, or manually through a tubular aerator installed inside the prechamber, connected via an exhaust valve to a secondary booster-mixing chamber and opening at a pressure of at least 0.9 MPa, where the gas-dispersed mixture is finally formed at a ratio the gas and dispersed phases in the range from 0.35: 1 to 100: 1, and the ratio of gas and liquefied phlegmatizers is taken in a ratio that provides a pressure in the gas system of at least 4 MPa at temperatures e (-50 ° C),

the second - from the booster-mixing chamber through the pipeline, the gas-dispersed mixture is fed into the nozzle block having a shut-off valve opening the nozzle block having at least one nozzle made with a supersonic confuser with a ratio of the nozzle length to its diameter providing a pressure at the nozzle exit of at least 0 , 11 MPa and mass flow rate of at least 15 kg / s.

Carbon dioxide and / or fluorocarbons or sulfur hexafluoride are used as a gaseous and / or liquefied phlegmatizer, bromine and / or iodine-halogenated hydrocarbons are used as gaseous and / or liquefied homogeneous inhibitors, nitrogen or argon, or a mixture thereof are used as gas phlegmatizers and as a heterogeneous inhibitor use fire extinguishing powders based on chlorides, sulfates, phosphates or carbonates of an alkali, alkaline earth metal or ammonium, or a mixture thereof.

A device for extinguishing flammable and combustible liquids in tanks with a fixed roof or with a fixed roof and a pontoon, or with a floating roof contains a pre-chamber with a dispersed chemical combustion inhibitor with a sealed cap, gas source (s) providing injection of a dispersed inhibitor, located in the indicated container, the starting-locking device and the outlet pipe with a nozzle block located in the upper part of the tank above the liquid surface, pontoon or floating roof , and differs in that the source (s) of gas is connected (s) with the cavity of the container with a dispersed inhibitor through a tubular aerator mounted in a cover having an outlet pipe with an outlet valve that opens at a pressure of at least 0.9 MPa and connects the prechamber with acceleration - a mixing chamber, which, in turn, is connected through a pipeline with a membrane, mechanical or electric valve to a nozzle block having at least one nozzle, made with a supersonic confuser with a ratio of nozzle length to its diameter, providing cutting pressure of at least 0.11 MPa and a discharge velocity of at least 240 m / s.

The device is characterized in that the start-up locking device is made with automatic, autonomous and manual start.

The invention is illustrated in figure 1-3, which shows the device and their location for various tanks.

Figure 1 presents the diagram of the reservoir (RVS) 4 with a fixed roof 1, filled with flammable liquids (GV) 5 and equipped with a device for extinguishing 3 with a nozzle block 2.

Figure 2 presents the diagram of the reservoir (RVSP) 6 with a fixed roof 1 and a pontoon 7, with an embankment 8, filled with flammable liquids (GV) 5 and equipped with an extinguishing device 3 with a nozzle block 2 and a pipe 9.

Figure 3 presents the diagram of the reservoir (RVSPK) 10 with a floating roof 11, filled with LVZH (GZH) 5 and equipped with a device for extinguishing 3 with a nozzle block 2.

A device that implements a method of extinguishing a fire in PBC, is illustrated in Fig.4. The device comprises a pre-chamber 12 with a sealed lid 13 and with a dispersed chemical combustion inhibitor 14, gas sources (gas cylinder 15 and gaseous and / or liquefied phlegmatizer, and / or inhibitor 16, trigger-lock device (ROM) 17, exhaust valve 18 opening at a pressure of at least 0.9 MPa, a tubular aerator 19 connecting the cavity of the pre-chamber 12 through a ROM 17 with a gas source 15, a mixing and accelerating chamber 20, a pipeline 9, with a shut-off valve 22, a nozzle block 2 with a supersonic confuser 23.

The device is made with automatic, autonomous and with manual start.

The implementation of the method is as follows. In the event of a fire in a tank containing flammable liquids and flammable liquids from an independent detector installed, for example, inside the tank, a signal is sent to a start-up device 17, which opens a gas cylinder 15 with a gas and / or liquefied phlegmatizer or inhibitor 16, which through a tube aerator 19 a pressure of at least 2.5 MPa is supplied to the pre-chamber 12 with a dispersed chemical inhibitor 14. When the pressure in the tank 12 exceeds 0.9 MPa, the outlet valve 18 and a mixture of gas, powder, liquefied and solid (“frozen gas”, for example p, carbon dioxide) enters the mixing and accelerating chamber 20, where the fire extinguishing gas-dispersed mixture is finally formed, which through the pipe 7 through the shut-off valve 22 enters the nozzle block 2 with a supersonic confuser 23, where it accelerates to a zone of at least 240 m / s fire with a flow rate of at least 15 kg / s. Evaluation of the effectiveness of the proposed method and device, and the prototype method was carried out in a tank with a fixed roof RVS-1000. Before testing the device, the fire extinguishing modules “BiZone-RG”, “BiZone-RT” (for extinguishing a fire on the floating roof of the tank) were kept for a day at a temperature from (-21 ° С) to (-50 ° С). The test results are shown in the table. As can be seen from the data in the table, the range of application of the proposed method is expanded by 30 ° C and applicable at (-50 ° C), an increase in the rate of expiration of the GDS in 1.05-10.2 times, an increase in flow rate of 1.94-75, 8 times, with a decrease in the metal consumption of the prototype device by 3.57-5.2 times.

Table Characteristics of the BiZone-RG gas dispersed module and fire extinguishing parameters. No. p / p Name of characteristics and parameters Values of PM characteristics and extinguishing parameters The extinguishing parameters according to the method one 2 3 four 5 6 7 8 9 10 one Mass of gas ¹ , kg 35 39 fifty 75 140 148.5 148.6 1.92-10.8 2 The mass of the dispersed phase ^2,3,4 kg 115 111 one hundred 75 10 1,5 1.4 0.72-9.6 3 m _gas / m _phase 0.3 0.35 0.5 one fourteen one hundred 106 0.35-100 four Gas cylinder pressure, MPa 3,5 four 7.7 12 16 19.6 twenty 2.0-15 5 Working pressure in a prechamber not less, MPa 2,4 2.5 4.8 7.5 10 12,2 12.8 0.42-2.8 6 GDS outflow rate, m / s 230 240 251 266 292 320 325 31-229

Table continuation one 2 3 four 5 6 7 8 9 10 7 GDS release time, s
Т = (- 50 ° С) ÷ (+ 50 ° С) 11-15 8-10 5-6.5 3.5-4.8 2.7-3.2 2-3 1.9-2.8 1,5-11 8 GDS consumption, kg / s,
Т = (- 50 ° С) ÷ (+ 50 ° С) 10-13.6 15-21,4 23-30 31.25-42.85 46.8-55.5 50-75 53.5-78.9 1.04-7.7 9 Extinguishing time RVS-1000 ³ , s Does not put out ~ 10 ~ 7 ~ 4 ~ 3 ~ 2 Does not put out Does not put out Note. 1. As the gas component of the GDS, the following were used: carbon dioxide, nitrogen, argon, inergen, Freon 114 B2, a solution of iodine or a solution of its compounds in combination with liquefied carbon dioxide or Igmer (Freon 318-C).
2. As a dispersed phase of GDS, fire extinguishing powder compositions were used based on the ammophos Vekson AVS-50, Phoenix AVS-70, P-2AP, P-2APM, P-2ASH, based on hydrocarbon: PSB-3 and PSB -3M, based on potassium chloride: fire extinguishing powder, PCC (see S.V.Sobur. Automatic fire extinguishing installations: Handbook. Special equipment. - M. 2002; and A.Ya. Korolchenko. Fire and explosion safety of substances and materials:, part 1 Handbook, The Association for Fire Science, M. 2000, 109 pp.
The weight of the BiZone-RG device, depending on the ratio of the gas and dispersed components of the mixture, is in the range of 0.48-0.7 tons.
3. When extinguishing flammable liquids in the RVS-1000 according to the prototype method No. 221508, 13 Bizon modules were taken according to the RF patent No. 2193427 with a total mass of GDS equal to 150 kg, i.e. equal to the mass of the GDS “BiZone-RG" of the claimed device. Extinguishing was carried out after holding the products for a day in a heat chamber at a temperature from (-21 ° C) to (-50 ° C).

Claims (4)

1. The method of extinguishing flammable and combustible liquids in tanks with a fixed roof or with a fixed roof and a pontoon or in tanks with a floating roof by supplying a fire extinguishing gas dispersed mixture from a fire extinguishing modular device or unit installed outside the tank or on a floating roof, characterized in that a gas-dispersed fire extinguishing mixture is formed in two stages:
the first is in a tank in a prechamber with a dispersed heterogeneous chemical combustion inhibitor by supplying at least one fifth of a gaseous and / or liquefied combustion inhibitor or a mixture of a gaseous and / or liquefied phlegmatizer with methyl, ethyl, propyl carbinol under a pressure of at least 2.5 MPa or a mixture thereof and / or a 5-20% solution of iodine or iodide of an alkali metal or ammonium or a mixture thereof in the aforementioned solvents-carbonols, the gaseous and / or liquefied components of the mixture being introduced into the prechamber from a cylinder or system of allones or a gas generator with start-up devices at the signal from the detector or manually through a tube aerator installed inside the prechamber, connected through an exhaust valve to a secondary booster-mixing chamber, and opening at a pressure of at least 0.9 MPa, where a gas-dispersed mixture is finally formed at a gas ratio and dispersed phase in the range from 0.35: 1 to 100: 1, moreover, the ratio of gas and liquefied phlegmatizers is taken in a ratio providing a pressure in the gas-balloon system of at least 4 MPa at a temperature round -50 ° С,
the second - from the booster-mixing chamber through the pipeline, the gas-dispersed mixture is fed into the nozzle block having a shut-off valve opening the nozzle block, the latter being made with a supersonic confuser with a ratio of nozzle length to its diameter providing a pressure at the nozzle exit of at least 0.11 MPa and mass flow rate of at least 15 kg / s. 2. The method according to claim 1, characterized in that carbon dioxide and / or fluorocarbons or sulfur hexafluoride are used as gaseous and / or liquefied phlegmatizer, bromine and / or iodine-halogen hydrocarbons are used as gaseous and / or liquefied homogeneous inhibitors , nitrogen or argon is used as gas phlegmatizers, and fire extinguishing powders based on chlorides, sulfates, phosphates or carbonates of an alkali, alkaline earth metal or ammonium or a mixture thereof are used as a heterogeneous inhibitor. 3. A device for extinguishing flammable and combustible liquids in tanks with a fixed roof, or with a fixed roof and a pontoon, or with a floating roof, containing a pre-chamber with a dispersed chemical combustion inhibitor with a sealed lid, a gas source or sources providing injection of a dispersed inhibitor, located in the specified capacity, the starting-locking device and the outlet pipe with a nozzle block located in the upper part of the tank above the surface of the liquid, pontoon or floating to larvae, characterized in that the source or sources of gas are connected to the cavity of the container with a dispersed inhibitor through a tubular aerator mounted in a lid having an outlet pipe with an outlet valve that opens at a pressure of at least 0.9 MPa and connects the prechamber to the booster a chamber, which, in turn, is connected through a pipeline with a membrane, mechanical or electric valve to a nozzle block made with a supersonic confuser with a ratio of the length of the nozzle to its diameter, providing pressure on the section is not less than 0.11 MPa and the discharge velocity is not less than 240 m / s. 4. The device according to claim 3, characterized in that the starting and closing device is made with automatic, autonomous and manual start.

Images