Flame projector

Abstract

Flame projector comprising a fuel nozzle connectable to a line leading to a fuel gas, liquid fuel, or solid fuel, and having at least two bores, wherein the diameter of each bore differs from the other bore(s), wherein one bore of the fuel nozzle is located at a higher level than the other bore, characterized in that the bore located at a higher level than the other bore of the fuel nozzle has a larger diameter (5), (7), (11) than the lower bore, which has a smaller diameter (6), (8), (12), and an ignition source (1), (2) is located above the nozzle at a certain distance from the nozzle, wherein the bores with the smaller diameter (6), (8), (12) may also be present multiple times.

Description

[0001] The invention relates to a flame projector and burning nozzles that can be used in a flame projector.

[0002] Flame projectors are used to create columns of flame at events, such as on stages, indoors and outdoors. Another name for flame projectors is flame effect device.

[0003] These devices produce short fireballs or longer-lasting columns of flame that can be 1.0 to 20.0 m high.

[0004] The object of the invention is to improve the state of the art and in particular to provide a flame projector that is particularly compact in design.

[0005] The problem is solved by the features of the claims.

[0006] The invention relates to a fuel nozzle that can be connected to a line leading to fuel gas, liquid fuel or solid fuel and has at least two bores, preferably with the diameter of each bore being different from the other bore(s).

[0007] The bores are preferably injection bores for the fuels.

[0008] The flame projectors according to the invention, with the fuel nozzle according to the invention, are operated with fuel gas, liquid fuel, or solid fuel. Preferably, propane, butane, methane, and mixtures thereof, such as preferably butane with propane, are used as fuel gases. The fuel gas can be drawn from the liquid phase in the liquid state, with the gas container preferably being upside down or having a corresponding riser pipe, preferably producing an aerosol, or from the gaseous state. Preferably, ethanol, methanol, 1-propanol, isopropanol, gasoline, diesel, and isoalkanes with C10, C11, C12, C13, C14, C15, and C16 carbon chains are used as liquid fuels, with isoalkanes of CAS No. 64742-48-9 (Isopar M) being preferred and those of CAS No. 64742-47-8 (Isopar L) being particularly preferred.

[0009] Solid fuels such as lycopodium powder can also be used.

[0010] Non-gaseous fuels are injected through the bores of the fuel nozzle preferably with the aid of gases, such as preferably nitrogen or carbon dioxide, under pressure, such as a pressure of preferably 2–100 bar, or they can also preferably be injected by means of a pump, such as preferably a metering pump, such as preferably a reciprocating pump, peristaltic pump, diaphragm pump, gear pump or other positive displacement pumps.

[0011] The fuels are preferably ignited via a two-pronged electrode, between which an electric arc is generated by means of high voltage. Ignition can also be achieved via a pilot flame that burns continuously at low intensity and is fueled by gaseous or vaporized liquid fuel. Ignition is also possible via a hot surface igniter (a glowing ceramic plate or element heated by an electric current or by a current-carrying filament).

[0012] Depending on the fuel, a special fuel nozzle may preferably be used. According to the invention, however, a fuel nozzle is used, wherein the nozzle has at least two bores and preferably the diameter of one bore is larger than the diameter of the other bore, wherein the bores with the smaller diameter can also be present multiple times, preferably 2, 3, 4, 5, 6, 7, 8 bores, wherein the bores with the smaller diameter always have a smaller diameter than the bore with the larger diameter, but otherwise the bores with the smaller diameter can have the same or arbitrarily different diameters.These bores can form the nozzle on one device or on two devices positioned side by side, where a device is understood to be something that preferably includes a connecting element, preferably a thread for screwing in, preferably an element that has a bore for atomizing a fuel and / or at least one bore for atomizing a fuel. The two bores of the nozzle(s) can be supplied with fuel via a common supply line or via separate supply lines. Thus, the fuel nozzle can be two-part, and in one part, the diameter of one bore can preferably be larger than the diameter of the other bore in the other part.

[0013] The diameter of the bores according to the invention, with the first bore having a larger diameter, preferably ranges from 0.3 mm to 5 mm, i.e., preferably 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm mm, 4 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5 mm, preferably 2 mm, and for the second bore with a smaller diameter preferably 0.1 mm to 2.0 mm, i.e. preferably 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, preferably 0.5 mm. The size of the nozzle bore is related to the desired flame height.

[0014] The hole spacing is preferably 1 cm to 4 cm, i.e. preferably 1 cm, 1.1 cm, 1.2 cm, 1.3 cm, 1.4 cm, 1.5 cm, 1.6 cm, 1.7 cm, 1.8 cm, 1.9 cm, 2 cm, 2.1 cm, 2.2 cm, 2.3 cm, 2.4 cm, 2.5 cm, 2.6 cm, 2.7cm, 2.8cm, 2.9cm, 3cm, 3.1cm, 3.2cm, 3.3cm, 3.4cm 3.5cm, 3.6cm, 3.7cm, 3.8cm, 3.9cm, 4cm, 4.1cm, 4.2cm, 4.3cm, 4.4cm, 4.5cm, 4.6cm, 4.7cm, 4.8cm, 4.9 cm, 5 cm is preferred, 2.5 cm is preferred for a flame projector with a flame height of 10 m. For larger or smaller flame projectors, the nozzle spacing is correspondingly larger or smaller in relation to the flame height of the flame projector, or the nozzle spacing is purely dictated by the design.

[0015] In a preferred embodiment, one bore is preferably located at a higher level than the other bore.

[0016] The height difference is preferably between 1 and 10 cm, i.e., preferably 1 cm, 2 cm, 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, 8 cm, 9 cm, 10 cm. The diameter of the two bores at different levels can be the same or different.

[0017] Preferably, the diameter of the first bore, located at the lower level, is smaller than the diameter of the second bore, located at the higher level.

[0018] Preferably, the second bore, which is located at a higher level than the other first bore, is realized by reaching the higher level of the second bore through a hollow tube with a defined length of preferably 1 cm to 10 cm, i.e. preferably 1 cm, 2 cm, 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, 8 cm, 9 cm, 10 cm, preferably 3 cm, the upper end of which forms the second bore.

[0019] It is preferred in the fuel nozzle according to the invention that the second bore, which is located at a higher level than the other first bore, has a larger diameter than the lower first bore with the smaller diameter.

[0020] In order to be able to shoot in several directions, preferably in 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etc. directions, the nozzle according to the invention can also be present multiple times, preferably the nozzle according to the invention can also be arranged multiple times, such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 times in a circular arrangement, preferably in one plane, wherein the circularly arranged nozzles can be movable, preferably all together, rotatably arranged on preferably a disk, or each of the circularly arranged nozzles can also be movable on its own on the circular arrangement or even only on its own, without all circularly arranged nozzles being moved together.The term "movable" means that the nozzle can be pivoted from its vertical axis by up to 180 degrees, i.e., 5 degrees, 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees, 160 degrees, 170 degrees, 180 degrees, preferably in all directions, preferably continuously, and preferably also be rotatable by 360 degrees.

[0021] The nozzles can also be arranged in any configuration, preferably in a line or polygonal, such as preferably triangular, square, pentagonal, hexagonal, heptagonal, octagonal, nine-sided, decagonal, etc., or in a zigzag pattern, preferably in a plane.

[0022] Another object of the invention is a flame projector which has a fuel nozzle according to the invention.

[0023] According to the invention, the flame projector preferably has flame monitoring.

[0024] The flame projector according to the invention preferably has an ionization electrode, an optical sensor for visible light or UV light, a heat radiation sensor or a temperature sensor in the flame as flame monitoring.

[0025] In principle, a flame projector is preferably a rectangular body. Preferably, it has a rectangular recess on its upper surface in the form of an open-topped box, creating a combustion chamber. The dimensions of the combustion chamber are preferably 18 × 18 × 18 cm. The nozzle for the fuel supply, according to the invention, is located in the base of the combustion chamber. An ignition source is located above the nozzle at a certain distance. Preferably, another electrode is located above the nozzle, for example, at approximately the same distance as the ignition electrode, to determine, preferably by means of an ionization measurement, whether the flame has been successfully ignited and is burning steadily. Lines for the fuel, in gaseous, liquid, or solid form, preferably lead into the combustion chamber.A combustion chamber is not strictly necessary, although its presence can be advantageous, for example, in windy conditions that make reliable flame ignition difficult. Similarly, the nozzle, ignition electrode, and ionization electrode for flame monitoring could be located in open space or in another suitable enclosure of any geometry.

[0026] Outside the combustion chamber, there is preferably a gas cylinder or one or more pressurized gas canisters or a tank for liquid or solid fuels.

[0027] Surprisingly, the nozzle according to the invention allows the flame projector to be made more compact. Whereas previously the combustion device, i.e., fuel supply, ignition, and ionization measuring electrode, was approximately 16 cm high, the combustion device is now, with the nozzle according to the invention, only about 4.5 cm high. This means that the flame projector according to the invention can be reduced to the height of a conventional flame projector. Fig. 1

[0028] In Fig. 1 is the nozzle according to the invention. 9 in the flame projector according to the invention 10 depicted, with the nozzle 9 a common fuel supply 4 is shown with two bores in a two-part form, wherein 5 the bore with the larger diameter is and 6 the bore with the smaller diameter. This nozzle 9-1 is equipped with an ionization electrode 1and the ignition electrode 2 in the combustion chamber 3 .

[0029] In the lower part of the Fig. 1 is a nozzle 9-2 presented in a one-piece form, whereby 7 the bore with the larger diameter is and 8 the bore with the smaller diameter. Fig. 2

[0030] Fig. Figure 2 shows another nozzle according to the invention, wherein the nozzle has a common fuel supply 4 is shown with two bores in a two-part form, wherein 11 the bore with the larger diameter, which is at a higher level than the bore 12 with the smaller diameter.

Claims

[1] Fuel nozzle which can be connected to a line leading to fuel gas or liquid fuel or solid fuel and which has at least two bores, the diameter of each bore being preferably different from the other bore(s). [2] Fuel nozzle according to claim 1 characterized by that the nozzle has at least two bores and the diameter of one bore is larger than the diameter of the other bore. [3] Fuel nozzle according to claim 1 or 2, characterized by that the fuel nozzle is two-part and in one part the diameter of the bore is larger than the diameter of the other bore in the other part. [4] Fuel nozzle according to one or more of claims 1 to 3, characterized by that one borehole is located at a higher level than the other borehole. [5] Fuel nozzle according to one or more of claims 1 to 4, characterized bythat one borehole is located at a higher level than the other borehole by reaching the higher level through a hollow tube of a defined length. [6] Fuel nozzle according to one or more of claims 1 to 5, characterized by that the borehole which is at a higher level than the other borehole has a larger diameter than the lower borehole which has a smaller diameter. [7] Flame projector comprising a fuel nozzle according to one or more of claims 1 to 6. [8] Flame projector according to claim 7, characterized by that it has flame monitoring. [9] Flame projector according to claim 7 or 8, characterized by that the flame monitoring system includes an ionization electrode, an optical sensor for visible light or UV light, a heat radiation sensor, or a temperature sensor in the flame.

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