WO2024257905A1 - Hose for firefighting - Google Patents

Abstract

The present invention provides a hose for firefighting, which has excellent durability to prevent bursting and has excellent flame retardancy and heat resistance to be usable for various purposes such as firefighting and gas torches.

Description

fire hose

The present invention relates to a fire hose used to transport high-pressure gas or fluid to a predetermined location, and more specifically, to a fire hose having excellent durability to prevent hose bursting, while providing excellent flame retardancy and heat resistance so that the hose can be used for purposes such as firefighting and gas torches.

In general, a hose is a pipe used to transport fluids such as water, gas, or flowable soil, and can be manufactured from a material with excellent flexibility so that it can bend freely.

Among these hoses, there was a problem with high-pressure hoses where vibrations were transmitted from the pump, causing the outer covering of the hose to peel off, and there was a problem with the hose's lifespan being shortened due to elongation of the hose when used.

In order to solve these problems, some structures have been disclosed in which the outer surface of the hose is knitted with cloth tape or wire. However, the above structures are not only inefficient, but also difficult to apply to high-pressure hoses rather than low-pressure hoses due to cost and structural problems, and even these were only applied to tubes rather than hoses.

And, as fields requiring flame retardancy, there are gas torches used for cutting and welding work, and hoses used for firefighting.

However, existing hoses lack flame retardancy, so when used for this purpose, parts of the hose can be easily damaged by flames or extreme heat. If the hose is damaged in this way, not only can there be a risk of a safety accident, but in the case of fire hoses, the damage can cause water to leak out in the event of a fire, making them unusable.

In addition, there are rubber hoses and PVC hoses as high-pressure hoses for oxygen gas. In the case of the rubber hose, although it has excellent heat resistance and insulation, the product is manufactured very thickly to have strong pressure resistance, so it is not only heavy but also inconvenient to use, and it is expensive and slow to produce, which greatly reduces its competitiveness.

On the other hand, the PVC hose has the advantage of being cheaper and easier to manufacture than the rubber hose, but it has the disadvantage of being weak to heat due to the nature of the PVC material. Accordingly, most PVC hoses are manufactured by mixing rubber components and antioxidants into PVC to compensate for the disadvantage of being weak to heat.

The main purpose of the present invention is to provide a fire hose having excellent flame retardancy, heat resistance and safety while increasing durability and preventing bursting of the hose.

The mobile fire suppression equipment, which is a means for solving the problem of the present invention, comprises: a base frame connected by at least one pair of support bars intersecting in the horizontal and vertical directions so as to protect a predetermined structure; according to one aspect of the above-described basic invention, a tubular inner cover; a fabric interwoven layer formed in the form of a mesh on the outer circumferential surface of the inner cover, including a first yarn continuously wound in a spiral shape at an angle of 105 to 110° on an outer circumferential surface of the inner cover, and a second yarn continuously wound in a direction intersecting the first yarn and overlapping the first yarn; and a tubular outer cover formed to cover the fabric interwoven layer on the outer circumferential surface of the inner cover. The inner shell comprises a resin, and, with respect to 100 parts by weight of the resin, 45 to 53 parts by weight of a first plasticizer, 13.315 to 16.273 parts by weight of a second plasticizer, 2.151 to 2.629 parts by weight of a stabilizer, 0.653 to 0.799 parts by weight of a fat saccharide, 0.348 to 0.426 parts by weight of an antioxidant, 0.348 to 0.426 parts by weight of a UV stabilizer, and 0.061 to 0.075 parts by weight of a pigment, and the outer shell comprises a resin, and, with respect to 100 parts by weight of the resin, 44.995 to 54.993 parts by weight of a first plasticizer, 13.307 to 16.265 parts by weight of a second plasticizer, 5.397 to 6.597 parts by weight of a stabilizer, 0.349 to A fire hose is provided, comprising 0.427 parts by weight of an antioxidant, 0.349 to 0.427 parts by weight of a UV stabilizer, 17.984 to 21.98 parts by weight of a filler, 50.415 to 61.619 parts by weight of aluminum hydroxide, 7.189 to 8.787 parts by weight of a flame retardant, 1.791 to 2.189 parts by weight of calcium borate (Ca ₂ B ₂ O ₅ ·H ₂ O) and 0.698 to 0.854 parts by weight of a pigment.

According to another feature of the present invention, the first and second yarns of the fabric interwoven layer can be polyester reinforcing yarns.

According to another feature of the present invention, the fabric woven layer can be formed by weaving or knitting the first and second yarns in an over and under pattern.

According to the above embodiments of the present invention, the vibration transmitted from the pump is reduced, and the hose has excellent durability, thereby preventing bursting of the hose and improving its lifespan. In addition, the hose has excellent flame retardancy and heat resistance, so that it can be used as a fire hose required at a fire scene or can be used appropriately with a gas torch for cutting and welding work.

FIG. 1 is a perspective view showing a hose according to one embodiment of the present invention.

Figure 2 is a cross-sectional view of Figure 1.

Figure 3 is an actual photograph of a hose according to one embodiment of the present invention.

Figure 4 is a material property table showing the pressure length change rate and the pressure outer diameter change rate for a hose of one embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings.

FIG. 1 is an exploded perspective view of a mobile fire suppression device according to an embodiment of the present invention, FIG. 2 is an assembled perspective view of a mobile fire suppression device according to an embodiment of the present invention, and FIG. 3 is a practical view of the present invention. Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings. However, the embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

The embodiments of the present invention are provided to more completely explain the present invention to those with average knowledge in the relevant technical field. Therefore, the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation, and elements indicated by the same symbols in the drawings are the same elements. In addition, parts having similar functions and actions are indicated by the same symbols throughout the drawings.

Additionally, references throughout the specification to an element "including" means that other elements may be included, rather than excluding other elements, unless otherwise specifically stated.

FIG. 1 is a perspective view showing a hose according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is an actual photograph of a hose according to an embodiment of the present invention.

Referring to FIGS. 1 to 3, a hose (100) according to one embodiment of the present invention includes an inner layer (10), a fabric interwoven layer (20), and an outer layer (30). This hose (100) can have a working pressure of 50 kgf/cm2 and a bursting pressure of 180 kgf/cm2.

The endothelium (10) is formed in a tube shape and may be made of a material including rubber or resin to ensure flexibility.

Preferably, the endothelium (10) of one embodiment may include a resin and, with respect to 100 parts by weight of the resin, 45 to 53 parts by weight of a first plasticizer, 13.315 to 16.273 parts by weight of a second plasticizer, 2.151 to 2.629 parts by weight of a stabilizer, 0.653 to 0.799 parts by weight of a saccharide, 0.348 to 0.426 parts by weight of an antioxidant, 0.348 to 0.426 parts by weight of a UV stabilizer, and 0.061 to 0.075 parts by weight of a pigment.

More preferably, the inner skin (10) of one embodiment comprises 59.23 parts by weight of resin, 29.61 parts by weight of first plasticizer, 8.76 parts by weight of second plasticizer, 1.42 parts by weight of stabilizer, 0.43 parts by weight of fat saccharide, 0.23 parts by weight of antioxidant, 0.23 parts by weight of UV stabilizer, and 0.04 parts by weight of pigment. The remaining content is the balance.

The above resin (LS130) is a homopolymer manufactured by suspension polymerization and has properties such as an apparent specific gravity of 0.49 g/cm3, a degree of polymerization of 1250, a volatile matter of 0.1%, an average particle diameter of 135 μm, a particle size distribution (#45) of 0%, a particle size distribution (#200) of 1.8%, a plasticizer absorption amount of 29%, a thermal stability of 72 minutes (min), and a resin whiteness of 96 WI. In particular, it can have improved soft compoundability because it has a high plasticizer absorption amount and a fast absorption speed.

In addition, the resin (LS130) is made of PVC particles that are uniformly spherical in shape, and the size of the PVC particles is adjusted to be suitable for soft processing using a plasticizer. In addition, the resin (LS130) has a vivid color, excellent transparency, and excellent color expression performance during colored processing.

The above plasticizer acts to prevent the polymers from sticking strongly to each other by entering between polymers. Since a void space is created at this time, it is easy to make a considerably soft plastic, which improves processability and provides flexibility to the hose. The first plasticizer may optionally be a dioctyl adipate or trioctyl trimellitate plasticizer, and the second plasticizer may be dioctyl adipate (C ₂₂ H ₄₂ O ₄ ), which has excellent cold resistance, light resistance, and heat resistance.

The stabilizer may be a Ca-Zn based powder stabilizer, the fatty acid may use a general purpose rutile type titanium dioxide pigment manufactured by a chlorine method, the antioxidant may be tetrakis(methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid))methane, and the UV stabilizer may be 2-hydroxy-4-(octyloxy)benzophenone.

This lining (10) can be formed by applying heat of 160 to 180°C to a material prepared in a mold according to specifications and then extruding it into a tube shape under the pressure of an extruder.

The lining (10) according to one embodiment may have excellent durability, flame retardancy, and heat resistance by including various types of additives described above.

The fabric interwoven layer (20) is intended to provide durability capable of withstanding the internal pressure required for the inner lining (10), and effectively prevents the hose (100) from swelling or bursting in one direction by suppressing the inner lining (10) from stretching in the longitudinal direction.

In addition, the fabric interwoven layer (20) includes first yarns (21) and second yarns (22) that are wound in a direction crossing each other on the outer peripheral surface of the inner lining (10), and are formed in a mesh shape on the outer peripheral surface of the inner lining (10).

The first yarn (21) is continuously wound in a spiral shape at an angle of 105 to 110° on the outer surface of the inner skin (10).

The second yarn (22) is wound continuously in a spiral shape on the outer surface of the inner lining (10) so as to overlap with the first yarn (21) in a direction intersecting with the first yarn (21).

In addition, the fabric woven layer (20) can be formed by weaving or knitting the first and second yarns (21, 22) in an over and under pattern. At this time, the first and second yarns (21, 22) can be arranged in the same over and under pattern, or can be arranged in different over and under patterns if necessary, and various configurations are possible.

In addition, the first and second yarns (21, 22) may use, for example, thin filament yarns, preferably polyester reinforcing yarns, and the present invention is not limited to a specific yarn.

Additionally, the first and second yarns (21, 22) may be composed of a compound yarn made by plying two or more basic yarns.

In addition, the first and second yarns (21, 22) may be made of the same thickness or may be made of different thicknesses if necessary, and the present invention is not limited thereto.

The outer shell (30) is formed to cover the fabric interwoven layer (20) on the outer surface of the inner shell (10) and is formed in a tube shape. In addition, the outer shell (30) may be made of a material including rubber or resin to ensure flexibility.

Preferably, the outer shell (30) of one embodiment comprises a resin and, with respect to 100 parts by weight of the resin, 44.995 to 54.993 parts by weight of a first plasticizer, 13.307 to 16.265 parts by weight of a second plasticizer, 5.397 to 6.597 parts by weight of a stabilizer, 0.349 to 0.427 parts by weight of an antioxidant, 0.349 to 0.427 parts by weight of a UV stabilizer, 17.984 to 21.98 parts by weight of a filler, 50.415 to 61.619 parts by weight of aluminum hydroxide, 7.189 to 8.787 parts by weight of a flame retardant, 1.791 to 2.189 parts by weight of calcium borate (Ca ₂ B ₂ O ₅ ·H ₂ O) and 0.698 to May contain 0.854 parts by weight of pigment.

More preferably, the outer shell (30) of one embodiment may include 19.34 parts by weight of a first plasticizer, 5.72 parts by weight of a second plasticizer, 2.32 parts by weight of a stabilizer, 0.15 parts by weight of an antioxidant, 0.15 parts by weight of a UV stabilizer, 7.73 parts by weight of a filler, 21.67 parts by weight of a first flame retardant, 3.09 parts by weight of a second flame retardant, 0.77 parts by weight of calcium borate (Ca ₂ B ₂ O ₅ ·H ₂ O)), and 0.3 parts by weight of a pigment, relative to 38.69 parts by weight of a resin.

The above resin (LS130) can use a homopolymer manufactured by suspension polymerization, the first plasticizer can optionally use dioctyl adipate or trioctyl trimellitate plasticizer, and the second plasticizer can use dioctyl adipate (C ₂₂ H ₄₂ O ₄ ).

The above stabilizer may be a material including zinc stearate, magnesium aluminum hydroxy carbonate and stearic acid. The filler may use CaCO ₃ .

The above first flame retardant may be aluminum hydroxide, which may generate water through endothermic decomposition when a fire occurs, thereby implementing a flame retardant effect, and may prevent combustion through a cooling effect by the generated water.

The above second flame retardant may be antimony trioxide (Sb ₂ O ₃ ), which may form a gas phase when combusted due to a fire and stop free radical reactions, thereby implementing a flame retardant effect.

The above calcium borate (Ca ₂ B ₂ O ₅ ·H ₂ O)) is a component that acts as a flame retardant and smoke inhibitor and may further include calcium magnesium silicates.

The above antioxidant may be tetrakis(methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid))methane.

The above UV stabilizer may be 2-Hydroxy-4-(Octyloxy)Benzophenone, and may play a role in preventing plastic from decomposing by selectively absorbing ultraviolet rays from sunlight and converting them into heat energy or extinguishing free radicals generated by decomposition from ultraviolet rays.

The fire hose of the present invention has improved flame retardancy and can be used for applications requiring flame retardancy, for example, as a gas torch or fire hose for performing cutting and welding work.

The outer shell (30) according to one embodiment may have flame retardancy of VO32 grade and excellent heat resistance by including various types of additives described above.

Figure 4 is a material property table for a fire hose according to one embodiment. In this case, the inner cover contains 15 parts by weight of dioctyl adipate. In addition, the inner diameter of the hose is 12.5 mm, the outer diameter is 19.2 mm, and the hood is 3 mm.

As can be seen in FIG. 4, the hose of one embodiment exhibited a pressure length change rate of 0.95% at 80 bar and 2.88% when the temperature was raised to 100°C at the same 80 bar, and a pressure outer diameter change rate of 9.38% at 80 bar and 10.52% when the temperature was raised to 100°C at the same 80 bar, indicating that the hose has excellent durability, and that the pressure length change rate and the pressure outer diameter change rate do not change significantly even when heated.

Accordingly, the fire hose (100) configured in this manner has better cold resistance and heat resistance than conventional PVC hoses, is lightweight, and has excellent flame retardancy, heat resistance, and durability, so it can be appropriately used in various fields requiring flame retardancy. For example, it can be used as a fire hose, or can be used as an oxygen gas hose because it can prevent the surface of the hose from melting due to metal shavings that fall on the surface of the hose.

The present invention is not limited to the above-described embodiments and the attached drawings, but is intended to be limited by the appended claims. Accordingly, various forms of substitution, modification, and change may be made by those skilled in the art within the scope that does not depart from the technical idea of the present invention described in the claims, and this will also be considered to fall within the scope of the present invention.

Claims (7)

tubular endothelium; A fabric interwoven layer formed in a mesh shape on the outer surface of the inner skin, comprising a first yarn that is continuously wound in a spiral shape at an angle of 105 to 110° on the outer surface of the inner skin, and a second yarn that is continuously wound in a direction intersecting the first yarn and overlapping the first yarn; and A tube-shaped outer shell formed to cover the fabric interwoven layer on the outer peripheral surface of the inner shell; The above-mentioned inner skin comprises a resin, and, with respect to 100 parts by weight of the resin, 45 to 53 parts by weight of a first plasticizer, 13.315 to 16.273 parts by weight of a second plasticizer, 2.151 to 2.629 parts by weight of a stabilizer, 0.653 to 0.799 parts by weight of a saccharide, 0.348 to 0.426 parts by weight of an antioxidant, 0.348 to 0.426 parts by weight of a UV stabilizer, and 0.061 to 0.075 parts by weight of a pigment, The above outer shell comprises, with respect to 100 parts by weight of the resin, 44.995 to 54.993 parts by weight of a first plasticizer, 13.307 to 16.265 parts by weight of a second plasticizer, 5.397 to 6.597 parts by weight of a stabilizer, 0.349 to 0.427 parts by weight of an antioxidant, 0.349 to 0.427 parts by weight of a UV stabilizer, 17.984 to 21.98 parts by weight of a filler, 50.415 to 61.619 parts by weight of aluminum hydroxide, 7.189 to 8.787 parts by weight of a flame retardant, 1.791 to 2.189 parts by weight of calcium borate (Ca ₂ B ₂ O ₅ ·H ₂ O)) and 0.698 to 0.854 parts by weight of A fire hose, characterized in that it contains pigment. In the first paragraph, A fire hose, characterized in that the inner skin contains 29.61 parts by weight of a first plasticizer, 8.76 parts by weight of a second plasticizer, 1.42 parts by weight of a stabilizer, 0.43 parts by weight of a sugar, 0.23 parts by weight of an antioxidant, 0.23 parts by weight of a UV stabilizer, and 0.04 parts by weight of a pigment, with respect to 59.23 parts by weight of a resin. In the first paragraph, A fire hose, characterized in that the outer shell contains, with respect to 38.69 parts by weight of resin, 19.34 parts by weight of a first plasticizer, 5.72 parts by weight of a second plasticizer, 2.32 parts by weight of a stabilizer, 0.15 parts by weight of an antioxidant, 0.15 parts by weight of a UV stabilizer, 7.73 parts by weight of a filler, 21.67 parts by weight of a first flame retardant, 3.09 parts by weight of a second flame retardant, 0.77 parts by weight of calcium borate (Ca ₂ B ₂ O ₅ ·H ₂ O)), and 0.3 parts by weight of a pigment. In the first paragraph, The above endothelium, The above resin (LS130) can use a homopolymer manufactured by suspension polymerization, The above first plasticizer may optionally be dioctyl adipate or trioctyl trimellitate plasticizer. The second plasticizer may be dioctyl adipate (C ₂₂ H ₄₂ O ₄ ), which has excellent cold resistance, light resistance, and heat resistance. The above stabilizer may be a Ca-Zn type powder stabilizer, The above-mentioned sugars can use a general-purpose rutile-type titanium dioxide pigment manufactured by the chlorine method. The above antioxidant may be tetrakis(methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid))methane, A fire hose, characterized in that the UV stabilizer is 2-Hydroxy-4-(Octyloxy)Benzophenone. In the first paragraph, The above outer shell, The above resin (LS130) can use a homopolymer manufactured by suspension polymerization. The above first plasticizer may optionally be dioctyl adipate or trioctyl trimellitate plasticizer. The above stabilizers include zinc stearate, magnesium aluminum hydroxy carbonate and stearic acid. The above filler can use CaCO ₃ , The first flame retardant may be aluminum hydroxide. The second flame retardant may be antimony trioxide (Sb ₂ O ₃ ). The above calcium borate (Ca ₂ B ₂ O ₅ ·H ₂ O)) is a component that acts as a flame retardant and a smoke suppressant and may further include calcium magnesium silicates. The above antioxidant may be tetrakis(methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid))methane, A fire hose, characterized in that the UV stabilizer used herein is 2-Hydroxy-4-(Octyloxy)Benzophenone. In the first paragraph, A fire hose, characterized in that the first and second yarns of the above-mentioned fabric layer are polyester reinforcing yarns. In the first paragraph, A fire hose, characterized in that the above-mentioned fabric interwoven layer is formed by weaving or braiding the first and second yarns in an over and under pattern.

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