Transfer oven ensuring high-speed polymerization of composite-reinforced tanks for cryogenic liquids as well as for gases under high pressure.

Abstract

The present invention relates to the high-speed, low-energy polymerization of cryogenic liquid and high-pressure gas storage tanks for compressed gas storage, whether for industrial or transportation needs. Transportation includes automobiles, buses and coaches, railcars, trucks, ships, airplanes, rockets, and spacecraft. Conventional solutions use conventional ovens that heat the tanks externally. The solution of the invention allows polymerization more than four times faster than traditional solutions because the tanks are heated primarily through the bore, using temperatures between 160 and 220°C, whereas traditional ovens operate at temperatures between 100 and 130°C. (Figure to be published for the abstract: Figure 7)

Description

Title of the invention: Transfer oven ensuring high-speed polymerization of composite-reinforced tanks for cryogenic liquids as well as for gases under high pressure. Technical field

[0001] High-pressure tanks are used to store compressed gases, whether for industrial or transport purposes. Transport includes automobiles, coaches, buses, railcars, trucks, ships, airplanes, rockets, and spacecraft.

[0002] The gas to be stored under pressure may be compressed air, natural gas, any kind of industrial gas, and in particular hydrogen or helium. These latter gases have the characteristic of being extremely volatile, which therefore requires perfectly sealed tanks.

[0003] The future of road mobility, particularly heavy goods transport, lies in the use of hydrogen, rather than electric batteries. Therefore, it is necessary to consider mass production technologies for low-cost and highly reliable pressure tanks.

[0004] Used to date mainly in chemistry or refining, hydrogen is an energy carrier that could contribute to decarbonizing certain industrial sectors, and in particular serve the transport sector.

[0005] The deployment of hydrogen technologies however involves overcoming a number of obstacles, and in particular that of the production of small tanks in order to reduce their cost. Definitions#:

[0006] By "capability" we describe the ability of a means of production to produce without incident or stoppage of said production, we say for example that such a means has a capability of 80%, when it is able to produce 80% of the time.

[0007] By "productivity" we mean the quantitative ratio between the production (outputs) and the resources (inputs) that are put in place to obtain this production.

[0008] By axis “AS” we designate the polar axis of revolution symmetry of a reservoir, this axis, going from one pole to the other of the said reservoir.

[0009] The term “liner” refers to the sealed inner casing of a gas tank.

[0010] A tank is mainly composed of a cylindrical part bordered by two domes which close its ends, the transition zone beyond the cylindrical part extends, in the domes, by a zone called shoulder the ends of the tank are called the poles.

[0011] The term "strafil" or fibers refers to a bundle of fibrils grouped together in a bundle

[0012] The term "pre-impregnated Stratifil" refers to Stratifil impregnated with a "pre-impregnation complex." This pre-impregnation complex is composed of a high molecular weight resin, a hardener, and an accelerator. At room temperature, the pre-impregnation complex, called the matrix, is particularly viscous (approximately 200 Pa), therefore it does not flow and keeps the fibers perfectly "in place" within the pre-impregnated Stratifil. The Stratifil impregnated with the matrix assembly is referred to as the composite. The resin, hardener, and accelerator are referred to as the matrix. The impregnated Stratifil is referred to as the pre-impregnated composite, "fiber matrix," and, colloquially, "fiber resin."

[0013] By "tack" or "stickiness" we mean the property that a prepreg composite tape has of adhering to a support or to another prepreg composite tape, without slipping.

[0014] “Permeation” refers to the penetration of a permeate (liquid, gas, or vapor) through a solid. It is directly related to the concentration gradient of the permeate, the intrinsic permeability of the material, and its mass diffusivity. Permeation is modeled by equations such as Fick's laws of diffusion and can be measured using tools such as a permeameter.

[0015] In materials science, TG refers to the glass transition temperature (Tv in French), which describes the transition of a material from the glassy state to the rubbery (amorphous) state.

[0016] Polymerization is defined as: the chemical reaction by which small molecules (for example, epoxy monomers) react with each other to form molecules of higher molar masses (polymers) forming a rigid interconnected mechanical structure. Prior art

[0017] There are five main types of compressed gas storage tanks:

[0018] Type I corresponds to a thick metallic casing that acts both as a structural component and as a liner,

[0019] Type II comprises a metallic liner whose cylindrical portion is reinforced by a composite (fibers + resin) wound circumferentially by winding. With this type of tank, the liner bears a large part of the load due to pressurization; it is therefore structural.

[0020] Type III is a liner entirely wound with resin-coated fiber (composite structure). The liner is metallic, it does not bear the load (or very little) and is there only to prevent hydrogen permeation. This type of liner allows access to high static pressures, for example, 700 bar operating pressure.

[0021] Type IV is a liner entirely wound with resin-coated fiber (composite structure). The liner is made of polymer, for example, high-density polyethylene (HDPE); it does not bear the load and serves only to prevent hydrogen permeation. It should be noted that permeation is very poor for this type of tank, as are the slow (one hour) and difficult production time of the liner. This type of liner allows access to high operating pressures (700 bar). The composite structure is generally a carbon fiber laminate coated with epoxy resin.

[0022] Type V is a linerless tank, entirely wound on an inner mold, using resin-coated fiber (composite structure). This technology requires the use of an inner eutectic mold, which must be able to be extracted during polymerization, thus considerably complicating production.

[0023] Type III to V tanks almost exclusively use their composite structure to ensure good mechanical resistance to pressure.

[0024] Type I metal tanks are commonly used which have a considerable mass disadvantage in the context of their transport and even more so if they are used in transport.

[0025] In order to reduce the mass of tanks, a significant trend in transportation is to use type III & IV tanks, the composite of which consists of a system: fibers-resin wound by filament winding in a wet process. The fibers are either carbon fibers or composites of carbon fibers, glass fibers, or carbon fibers, basalt. The matrix is ​​either an epoxy, vinyl ester, or polyester matrix.

[0026] Filament winding using the "wet process" is a method inherited from the aviation industry; it is particularly unsuitable for mass production because it involves excessively long winding times. Managing the filaments, arranged in a sheet, is also laborious and complicated, especially during variations in filament speed, particularly when switching from polar to equatorial winding.

[0027] The matrices used in the wet process must not polymerize rapidly in the impregnation tank in order to be able to work for at least eight hours without having to clean the tank; it is therefore necessary to use resins of poor quality offering a low TG of the order of 110°C.

[0028] Type IV liners are generally made of HDPE (high-density polyethylene) or equivalent materials with low TG (maximum operating temperature: 105 °C; embrittlement temperature: -50 °C), which drastically limits the permissible polymerization temperatures and the hydrogen filling rate. Prior patents

[0029] French patent FR 3126148 of 17-02-2023 published under number 3081208 on 26-11-2021: this patent of the author describes an optimized structure, and means of mass production, of very high pressure tanks at low cost.

[0030] French patent FR 1701130 of October 31, 2017, this patent of the author describes the production of pre-impregnated Stratifil. Pre-impregnated Stratifil is useful within the scope of this patent.

[0031] French patent FR 2108636 of August 18, 2021, and US extension 17889177 of August 16, 2022, this patent of the author describes a new type of ultra-thin aluminum Type III liner. This patent describes a type of liner preferentially used in the context of the present patent.

[0032] French patent FR 2923575al of 15-05-2009 (Michelin) describes a type IV tank, its structure, and how to produce it using two ribbons. This patent has no relevant connection with the present patent.

[0033] US patent 2017 / 130017 A1 (Okamoto (JP)) of May 11, 2017 describes a prepreg laminate using a prepreg resin system of the applicant. This patent has no relevant connection with the present patent.

[0034] EP patent 2962833 A1 (Covess (DE)) of January 6, 2016 describes a reservoir made with thermoplastic ribbons. This patent has no relevant connection with the present patent. The purpose of this invention is:

[0035] To improve productivity by a factor of more than 2 compared to the prior art.

[0036] To allow significantly higher polymerization speeds than with traditional polymerization processes, thanks to the fact that we use an aluminum liner and in particular a new type of ultra-thin aluminum type III liner (see French patent FR 2108636).

[0037] To improve the capability of the polymerization means, thanks to the simplicity and efficiency of the means.

[0038] To improve the quality of polymerized reservoirs with said means.

[0039] To eliminate thermoplastic liners with low TG and high permeation rate. These thermoplastic liners are produced: by extrusion followed by blow molding, or by rotational molding. Preferably using a thin metallic liner (2) covered by French patent FR 2108636 of August 18, 2021, already mentioned above. DETAILED DESCRIPTION OF THE INVENTION

[0040] Figure 5 shows an external view of the oven (2). The motors (13a, 13b, 13c) for forced hot air ventilation inside the oven to ensure the polymerization of the reservoirs are visible.

[0041] Figure 6 is a cross-sectional view of the oven. Parallel reservoirs (1) are observed, perpendicular to their direction of movement. These reservoirs are in transfer from the inlet to the outlet. The reservoirs, during polymerization, are driven by two chains (10) located below the ends of the reservoirs, as shown in Figure 3.

[0042] Said chains (10) are driven by the motor (14) visible in [Fig.5]

[0043] The tanks (1) are equipped with cylindrical tools (16), located at their At the ends, the cylindrical tools are placed on rollers (11) (see Figures 4a, 4b, 4d, 4c). The rollers (11) are part of the chain links (10). These rollers roll on a rail (17) and rotate the tooling (16) of the reservoirs (1). Driven by the chain (10) during its movement, the reservoir therefore rotates along its axis "AS". This combined rotational-translational movement prevents the resin from flowing during polymerization (see Fig. 4b).

[0044] The air circuit (7a, 7b, 7c) captures air along the inner top of the oven (2), at (23) and leads it to the inlet of the turbine (19) see [Fig.3].

[0045] At the outlet of the turbine (19) the air passes through the plates of an electric exchanger (8) through which it is heated between 160 and 200 degrees Celsius depending on the characteristics of the resin used.

[0046] Then the hot air is directed by the linear convergent (9) towards the reservoirs (1) see [Fig.3].

[0047] The rollers of the chain carry plates (12) closing the linear convergent (9) locally and mobile convergents (18) which concentrate the flow of hot air towards the bore of the tooling (16) of the tanks (1) see [Fig.4a].

[0048] The philosophy behind this device is as follows: we have very thin aluminum liners. These liners conduct heat extremely well and can withstand temperatures well above 200°C without damage. Therefore, hot air can be blown directly into the liners to trigger the polymerization of the composite reinforcement of the tank (1) from the inside. Then, when the hot air exits on the other side of the tank, it spreads into the general cavity (22) of the oven (2), where it heats the outside of the composite reinforcement, thus ensuring external polymerization, before returning to the heating air circuit. This heating process reduces by half the distance the heat must travel to reach the entire thickness of the composite reinforcement of the tank (1).

[0049] It is possible to create a heating gradient along the oven by adjusting the temperature of the heating elements (8); we have, as an example, placed 3 turbines (19) and their motors (13a, 13b, 13c) along the oven (2), it is thus possible to create 3 different temperature zones, if necessary, by arranging sheets (20a, 20b) separating the 3 circuits (7a, 7b, 7c) into 3 independent zones (24a, 24b, 24c). (Therefore, one circuit per turbine (19)) BRIEF DESCRIPTION OF FIGURES AND LANDMARKS

[0050] [Fig. 1] Fig. 1 presents a bird's-eye view of the inlet of the oven (2) during the loading of a tank (1) by a robot (5). The door (4) of the oven (1) is held open by the cylinder (3).

[0051] [Fig.2a] Fig.2a presents a cutaway bird's-eye view of the inlet of the oven (2), allowing for a better appreciation of the robot (5) for introducing the reservoir (1) into the said oven (2). The said robot carries a gripping mechanism (6), which carries the reservoir (1) by the bore of its end tooling (16).

[0052] [Fig. 2b] Fig. 2b shows a close-up view of the grasping mechanism (6) of the reservoir (1); the said mechanism (6) being carried by the robot (5). The finger of the mechanism (6) enters the bore of the tooling (16) to carry the reservoir (1).

[0053] [Fig. 3] Figure 3 shows a cut-off end view of the oven (2); the The oven consists of an insulating wall (21) and the general cavity (22) of said oven. At the top of the cavity (22) is a passage (23) through which the air contained in the oven is directed towards the inlet of the fan (19) via the duct (7a). From the outlet of the fan (19), the air is directed towards the radiator (8) via the duct (7b). Once heated, the air is directed via the duct (7c) towards the linear converger (9). The air from the converger (9) is collected by the movable converger (18), which focuses it towards the bore of the tooling (16) carried by the end of the reservoir (1). Thus, the air enters said reservoir, heats the liner from the inside, and then escapes from the other end of the reservoir (1) towards the general cavity (22) where it heats the outside of the reservoir. The mobile convergent (18) is fixed on a link of the conveyor chain (10). On the other links of said chain (10) are fixed plates (12), see [Fig.[4a] The purpose of the metal plates (12) is to locally block the air outlet from the linear converging fan (9), in order to promote the capture of hot air by the mobile converging fan (18). A drip tray (15) is placed under the path of the reservoirs (1) to collect any resin droplets that might fall during polymerization. The two shafts (25) are located near the ends of the oven. These shafts, which carry the gears (26) that drive the chains (10), are supported by the structures (27). One of the shafts (25) extends through the wall of the oven (2) to be driven by the motor (14). The motor is located outside the oven (2).

[0054] [Fig.4a] the [Fig.4a] present a bird's-eye view of the chain (10) carrying pebbles (11) on which rests the cylindrical part (16) of the tooling located at the end of the tank (1). The chain (10), on the heating circuit side (7a, 7b, 7c), has a plate (12) on each of its links. At the tank (1) the plates (12) are replaced by a movable convergent (18). Note that in this view the linear convergent (9) has not been drawn in order to show the entrance of the movable nozzle (18).

[0055] [Fig.4b] In [Fig.4b] it is observed that, during the movement of the chain, of a At opposite ends of the oven, the rollers (11) roll on the rail (17); the rollers, rotating on their own axis, cause the cylindrical part (16) of the tank (1) tooling to rotate. Thus, the tank (1) rotates around its axis "AS", while simultaneously moving from one end of the oven to the other.

[0056] [Fig.4c] Fig.4c is a cross-sectional view at the level of a reservoir (1) allowing to observe the path of the hot air which goes from the linear convergent (9) towards the bore of the tooling (16) after having been guided by the mobile convergent (18).

[0057] [Fig.4d] The [Fig.4d] is a close-up view showing the front face of the movable nozzle (18) and the obturator plates (12) on the side of the friction zone with the linear convergent (9).

[0058] [Fig. 5] Fig. 5 shows a bird's-eye view of the oven (2) seen from the outside. The motors (13a, 13b, 13c) of the fans (19), the motor (14) driving the translation chains (10), and the two robots (5) for loading and unloading the tanks (1) are visible.

[0059] [Fig. 6] Fig. 6 presents a longitudinal cross-sectional view of the oven (2). The tanks (1) are shown in translational-rotatory section, as is the drive chain (10). The air intake zone (23) and the three heating zones (24a, 24b, 24c) are also visible. These zones are delimited in the drawing by two dashed lines (20a, 20b) which are positioned at the edges of the plates arranged perpendicularly inside the air circuits (7a, 7b, 7c).

[0060] [Fig. 7] [Fig. 7] presents a bird's-eye view of the air circuit. The circuits are distinguished air (7a, 7b, 7c), the fan (19), the radiator (8), the linear convergent (9) and part of a reservoir (1).

[0061] [Fig.8a] Fig.8a presents a double view from top left and bottom right of the movable nozzle (18) integrated into a link of the style chain (10b) by the structure integrated into the nozzle (29), structure (29) which reconstitutes the equivalent of a type 10b chain link.

[0062] [Fig.8b] The [Fig.8b] presents a double view from top left and bottom right of the movable nozzle (18) integrated into a link of the style chain (10c) by the structure integrated into the nozzle (28).

[0063] (1) "AS" axis reservoir

[0064] (2) oven

[0065] (3) door operating cylinder (4) of the oven (2)

[0066] (4) oven door (2)

[0067] (5) tank handling robot (1)

[0068] (6) mechanism for gripping the tanks (1) by means of the tooling bore end (16)

[0069] (7a, 7b, 7c) sheet metal delimiting the heating air circuit

[0070] (8) air heating radiator

[0071] (9) linear convergent focusing of air towards the reservoir area

[0072] (10) chain locally bearing pairs of rollers (11) a chain link is composed of parts (10a) (10b) and (10c)

[0073] (10a) chain axis

[0074] (10b) chain plate

[0075] (10c) chain cylinder

[0076] (11) rollers carried by a (10a) type axle

[0077] (12) multitude of plates each carried by a link of the chain (10), closing the linear convergent (9)

[0078] (13a, 13b, 13c) motors driving the fans (19)

[0079] (14) motor driving the shaft (25)

[0080] (15) drip trays

[0081] (16) cylindrical part of the tooling located at the end of the tank (1)

[0082] (17) roller support rail (11)

[0083] (18) mobile convergent, or mobile nozzle, capturing hot air from the linear convergent (9) and concentrating said air towards the bore of the tooling (16) located at the end of the reservoir (1). The movable convergent is fixed on a link of the chain (10).

[0084] (19) centrifugal fans driven by motors (13a, 13b, 13c)

[0085] (20a, 20b) diaphragms separating the air circuit delimited by the sheets (7a, 7b, 7c) into 3 zones (24a, 24b, 24c)

[0086] (21) insulating wall of the oven (2)

[0087] (22) general internal volume of the oven (2)

[0088] (23) air intake zone located at the top of the oven.

[0089] (24a, 24b, 24c) zones separated by the diaphragms (20a, 20b) perpendicular to the sheets (7a, 7b, 7c) and located in the air circuit delimited by said sheets (7a, 7b, 7c)

[0090] (25) shaft for supporting and driving the pinions (26)

[0091] (26) chain drive sprockets (10)

[0092] (27) chassis bearing support for shafts (25)

[0093] (28) false chain cylinder structural type (10c) integrated into the mobile convergent (18)

[0094] (29) false chain plate structural type (10b) integrated into the mobile convergent (18) REMARKS

[0095] It is specified that the adverbs preferentially and optionally mean that one can preferably use a solution or that one can choose not to use it while remaining within the scope of the invention.

[0096] The applicant also wishes to clarify that an illustrative figure represents one embodiment of the object according to the invention, but that there may be other embodiments which meet the definition of this invention.

[0097] He further specifies that, when, according to the definition of the invention, the object of the invention comprises “at least one” element having a given function, the embodiment described may comprise several of these elements.

[0098] It also specifies that, if the embodiments of the object, according to the invention, as illustrated, include several elements of identical function and if, in the description, it is not specified that the object according to this invention must necessarily include a particular number of these elements, the object of the invention may be defined as including “at least one” of these elements.

[0099] It is specified that when, in the present description, an expression defines by itself, without any particular specific mention concerning it, a set of structural characteristics, these characteristics may be taken, for the definition of the object of the protection sought, when this is technically possible, either separately, or in total and / or partial combination.

[0100] It also specifies that the term substantially can mean that the property, qualified in this way, can be understood either as being exactly, or as almost defined. SYNTHESIS

[0101] Transfer oven (2) providing high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquids and high-pressure gases, said tanks (1) being arranged parallel to each other and transversely to the transfer direction, said oven using hot air injection to generate polymerization directly inside the tanks (1), the injection being provided by a movable nozzle (18) accompanying each tank (1) and injecting hot air into it through the end bore of the tooling (16) of the tank (1), said hot air being collected by the movable nozzle (18) fixed on a link of the chain (10), the movable nozzle (18) moving along a linear convergent (9), the inlet of the movable nozzle having substantially the same height as the outlet of the linear convergent (9), the linear convergent being, himself,supplied by a heating circuit (7a, 7b, 7c) located upstream, after passing through the reservoir (1), the air escapes from the other end of the reservoir and spreads into the general cavity (22) of the oven (2), which heats the outside of the reservoir (1) and thus generates polymerization from the outside of the reservoir (1); thanks to this arrangement, The heat flow is better distributed and the polymerization is much faster and more homogeneous.

[0102] Transfer oven (2) ensuring the high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven being equipped with two rails (17) each supporting a chain (10) carrying pairs of rollers (11), rails and chains are located at the ends of the tanks (1), the two chains are each driven by a pinion (26) connected to a common drive shaft (25), the two ends of each tank (1) are equipped with tools (16), said tools are each supported by pairs of rollers (11), thus, during the synchronized translation of the chains (10), the rollers, rolling on their rail (17), drive the tanks (1) in combined rotation-translation.

[0103] Transfer oven (2) ensuring high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven, using plates (12) closing the hot air outlet from the linear convergent (9), said sealing plates (12) being fixed on each link of the chain (10) located on the side of the linear convergent (9), said sealing plates (12) being located between the movable nozzles (18), so that the assembly of nozzles (18) plus plates (12) forces the air, coming from the convergent (9), to pass exclusively through the movable nozzles (18).

[0104] Transfer oven (2) ensuring high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven, whose plates (12) closing the hot air outlet from the linear convergent (9) and the movable nozzles (18) are mechanically adjusted to each other and are set to rub against the linear convergent (9), said convergent having an antifriction-treated friction surface so that the assembly of nozzles (18) plus plates (12) forces the air, coming from the convergent (9), to pass exclusively through the movable nozzles (18).

[0105] Transfer oven (2) ensuring high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven, whose plates (12) closing the hot air outlet from the linear convergent (9) are treated with antifriction coating so that they can rub against each other and with the ends of the movable nozzles (18),

[0106] Transfer oven (2) ensuring high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquids as well as for gases under high pressure, said reservoirs (1) being arranged parallel to each other and across the direction of transfer, said oven, the antifriction treatment of the plates (12) and of the movable nozzles (18) can be made: either by a friction metal such as bronze, or by PTFE or by an equivalent antifriction material.

[0107] Transfer oven (2) ensuring high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven, whose movable nozzles (18) are made either of materials machined from solid, or by molding, or by 3D printing.

[0108] Transfer oven (2) ensuring high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven, the local link (28) of the chain intended to support said nozzles being directly incorporated into the lower part of the nozzle, thus forming a single unit.

[0109] Transfer oven (2) ensuring high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven, the local link (29) of the chain intended to support said nozzles being directly incorporated into the lower part of the nozzle, thus forming a single unit.

[0110] Transfer oven (2) ensuring high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven, whose rollers (11) are covered with a friction band either of rubber or silicone in order to prevent any slippage of the rollers (11) on the rails (17).

Claims

Demands

1. A transfer oven (2) providing high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquids and high-pressure gases, said tanks (1) being arranged parallel to each other and transversely to the transfer direction, said oven being characterized by the injection of hot air, intended to generate polymerization, directly from inside the tanks (1), the injection being ensured by a movable nozzle (18) accompanying each tank (1) and injecting hot air into it through the end bore of the tooling (16) of the tank (1), said hot air being collected by the movable nozzle (18), fixed on a link of the chain (10), the movable nozzle (18) moving along a linear convergent (9), the inlet of the movable nozzle having substantially the same height as the outlet of the linear convergent (9), the linear convergent being, itself,supplied by a heating circuit (7a, 7b, 7c) located upstream, after passing through the reservoir (1) the air escapes from the other end of the reservoir and spreads into the general cavity (22) of the oven (2), which allows the outside of the reservoir (1) to be heated and thus polymerization to be generated also from the outside of the reservoir (1).

2. A transfer oven (2), according to claim 1, ensuring the high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquids as well as for gases under high pressure, said tanks (1) being arranged parallel to each other and transversely to the direction of transfer, said oven being characterized by the presence of two rails (17), each supporting a chain (10) carrying pairs of rollers (11), rails and chains being located at the ends of the tanks (1), the two chains each being driven by a sprocket (26) connected to a common drive shaft (25), the two ends of each tank (1) being equipped with tooling (16), said tooling being supported each by the pairs of rollers (11), thus, during the synchronized translation of the chains (10), the rollers, rolling on their rail (17), drive the tanks in combined rotation and translation. (1).

3. Transfer oven (2), according to claims 1 and 2, ensuring the high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquids as well as for gases under high pressure pressure, the said reservoirs (1) being arranged parallel to each other and across the direction of transfer, the said oven being, characterized by the presence of plates (12) closing the hot air outlet from the linear convergent (9), the said closing plates (12) being fixed on each link of the chain (10) located on the side of the linear convergent (9), the said closing plates (12) being located between the movable nozzles (18), so that the assembly of nozzles (18) plus plates (12) forces the air, coming from the convergent (9), to pass exclusively through the movable nozzles (18).

4. Transfer oven (2), according to claims 1 to 3, ensuring the high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven being characterized in that the plates (12) closing the hot air outlet from the linear convergent (9) and the movable nozzles (18) are mechanically adjusted to each other and are set to rub against the linear convergent (9), said convergent having an antifriction-treated friction surface so that the assembly of nozzles (18) plus plates (12) forces the air, from the convergent (9), to pass exclusively through the movable nozzles (18).

5. Transfer oven (2), according to claims 1 to 4, ensuring the high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven being characterized in that the plates (12) closing the hot air outlet from the linear convergent (9) are treated with an antifriction coating so that they can rub against each other and with the ends of the movable nozzles (18),

6. A transfer oven (2), according to claims 1 to 5, providing high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquids and high-pressure gases, said tanks (1) being arranged parallel to each other and transversely to the transfer direction, said oven being characterized in that the antifriction treatment of the plates (12) and the movable nozzles (18) can consist of: either a metal friction material such as bronze, either by PTFE or by an equivalent anti-friction material.

7. Transfer oven (2), according to claims 1 to 6, ensuring high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven being characterized by the fact that the movable nozzles (18) are made either of materials machined from solid, or by molding, or by 3D printing.

8. Transfer oven (2), according to claims 1 to 7, ensuring the high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven being characterized in that the rollers (11) are covered with a friction band of either rubber or silicone.

9. Transfer oven (2), according to claims 1 to 8, ensuring the high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven being characterized by the fact that the local link (28) of the chain intended to support said nozzles is directly incorporated into the lower part of the nozzle (18), thus forming a single unit.

10. Transfer oven (2), according to claims 1 to 8 ensuring the high-speed polymerization of composite-reinforced tanks (1) for cryogenic liquid as well as for gas under high pressure, said tanks (1) being arranged parallel to each other and across the direction of transfer, said oven being characterized by the fact that the local link (29) of the chain intended to support said nozzles is directly incorporated into the lower part of the nozzle (18), thus forming a single unit.

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