A lightweight, flattenable refueling hose with a core wire and a preparation method thereof

Abstract

The present invention discloses a light-weight, suckable and flattened refueling hose with a core wire, which comprises an inner rubber layer, a mesh layer, a core wire layer, a middle rubber layer, a reinforcement layer, and an outer rubber layer from the inside to the outside; or an inner rubber layer, a reinforcement layer, a middle rubber layer, a core wire layer, a mesh layer, and an outer rubber layer from the inside to the outside; the core wire layer is composed of a core wire and a high-modulus low-shrinkage fiber. The refueling hose of the present invention has the advantages of being suckable and flattened, lightweight, having a core wire, and high explosive strength. It is easy to use, can be wound and unwound on a small reel for storage, can realize real-time signal transmission while refueling, can be sucked and flattened, and after refueling, the residual oil inside is first sucked and flattened through the hose to empty it, changing the problems of a large amount of oil remaining inside the traditional hose after refueling, difficulty in dragging by operators, and great difficulty in retracting and releasing, and greatly reducing the work intensity of operators.

Description

Technical Field

[0001] The invention belongs to the field of refueling hoses, and relates to a refueling hose and a preparation method thereof, and in particular to a lightweight, suckable, flat refueling hose with a core wire. Background Art

[0002] Traditional rubber refueling hoses are usually circular in structure, with the skeleton reinforcement layer or part of the skeleton reinforcement layer made of metal. The tube body itself is heavy, and a large amount of oil remains in the tube body after refueling. When the operator refuels again, he needs to drag the hose filled with oil for several meters or even dozens of meters to adjust the position and align the refueling port. This operation usually requires the assistance of several operators, which brings a lot of workload to the refueling work. In addition, during the dragging process, the hose containing oil increases the friction and wear of the ground on the hose surface due to its own weight, greatly reducing the service life of the hose and increasing the replacement frequency of the hose, which brings great disadvantages to the refueling work.

[0003] With the demand for intelligent refueling and the transmission of other auxiliary signals, the refueling hose is required to have a certain signal transmission function during the refueling process. Currently, the signal line is generally separately arranged on the outside of the hose, which causes a lot of inconvenience to operation and line laying.

[0004] In order to achieve lightweight, a flat hose similar to a fire hose is used on the market, which is generally composed of an inner rubber layer, a fiber reinforcement layer or an inner rubber layer, a fiber reinforcement layer, and an outer rubber layer. Compared with traditional hoses, although the weight of flat hoses is reduced, the pressure bearing capacity of such hoses is lower, the core wire function cannot be realized, and the service life is relatively short. Summary of the invention

[0005] The purpose of the present invention is to solve key product problems such as the inability of traditional refueling hoses to be sucked flat, the inability to integrate signal lines and the tube body, and the heavy weight, and to provide a lightweight, suckable, flat refueling hose with a core wire and a preparation method thereof.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A light-weight, suckable, flat refueling hose with a core wire, wherein the suckable, flat refueling hose comprises, from inside to outside, an inner rubber layer, a mesh layer, a core wire layer, a middle rubber layer, a reinforcing layer, and an outer rubber layer; or, from inside to outside, an inner rubber layer, a reinforcing layer, a middle rubber layer, a core wire layer, a mesh layer, and an outer rubber layer; wherein the core wire layer comprises a core wire and a high modulus low shrinkage fiber.

[0008] The thickness of the inner rubber layer is 1.0-2.5 mm.

[0009] The inner rubber material for preparing the inner rubber layer is one or a combination of chloroprene rubber, nitrile rubber, nitrile PVC rubber, HNBR rubber. Nitrile rubber has excellent comprehensive properties such as oil resistance, heat resistance, cold resistance, aging resistance, and chemical corrosion resistance, especially excellent resistance to non-polar and weakly polar oils and solvents. Preferably, the inner rubber material for preparing the inner rubber layer is nitrile rubber.

[0010] Specifically, the inner rubber material of the inner rubber layer is made of the following raw materials in parts by weight: 100 parts of nitrile rubber, 40-100 parts of natural gas semi-reinforced carbon black, 50-80 parts of clay, 20-50 parts of calcium carbonate, 5-30 parts of dioctyl sebacate, 3-7 parts of zinc oxide, 0.5-5 parts of stearic acid, 4-6 parts of antioxidant, 1-3 parts of sulfur, and 1-3 parts of accelerator; the antioxidant is a combination of antioxidant RD, antioxidant MB and antioxidant 4010NA in a weight ratio of 1:1:3; the accelerator is a combination of accelerator D and accelerator MBTS in a weight ratio of 1:4.

[0011] The thickness of the mesh layer is 0.3-0.5 mm.

[0012] The mesh layer is formed by winding the mesh outside the inner rubber layer or winding the mesh outside the core layer; the mesh density in the longitudinal and weft directions is 60 to 80 holes / 10cm, and the weight of the mesh is 70 to 100g / m 2 The longitudinal and latitudinal tensile strength of the mesh is 800-1200N / 5cm, and the longitudinal and latitudinal elongation of the mesh is 30-50%; the material of the mesh is nylon, nylon blended, or a combination of several thereof.

[0013] The core wire layer is formed by 1 to 12 core wires and 40 to 60 high-modulus low-shrinkage fibers uniformly distributed in a spiral shape around the outer side or the inner side of the mesh layer.

[0014] Preferably, the core wires are evenly distributed and inserted between the high modulus low shrinkage fibers.

[0015] The wire diameter of the core wire is 0.2-1.5 mm.

[0016] The high modulus low shrinkage fiber is one of 2000D-4000D polyester and aramid fibers.

[0017] The thickness of the middle rubber layer is 0.5-1.5 mm.

[0018] The middle rubber material for preparing the middle rubber layer is one or a combination of chloroprene rubber, nitrile rubber, nitrile PVC rubber and HNBR rubber.

[0019] Preferably, the middle rubber material for preparing the middle rubber layer is nitrile rubber or chloroprene rubber.

[0020] More preferably, when the suckable flat refueling hose is composed of an inner rubber layer, a mesh layer, a core wire layer, a middle rubber layer, a reinforcing layer, and an outer rubber layer from the inside to the outside, the middle layer rubber material used to prepare the middle rubber layer is the same as the inner layer rubber material used to prepare the inner rubber layer. The middle layer rubber material passes through the mesh holes of the mesh cloth to form a continuous phase with the inner layer rubber material, ensuring that the rubber materials penetrate each other to achieve sufficient bonding strength, which is more conducive to the positioning and protection of the core wire.

[0021] When the suckable flat refueling hose is composed of an inner rubber layer, a reinforcement layer, a middle rubber layer, a core layer, a mesh layer, and an outer rubber layer from the inside to the outside, the middle layer rubber material for preparing the middle rubber layer is the same as the outer layer rubber material for preparing the outer rubber layer. The outer layer rubber material penetrates through the mesh holes of the mesh cloth to form a continuous phase with the middle layer rubber material, ensuring that the rubber materials penetrate each other to achieve sufficient bonding strength, which is more conducive to the positioning and protection of the core wire.

[0022] Specifically, the middle rubber material of the middle rubber layer is made of the following raw materials in parts by weight: 100 parts of nitrile rubber, 40 to 100 parts of natural gas semi-reinforced carbon black, 50 to 80 parts of clay, 20 to 50 parts of calcium carbonate, 5 to 30 parts of dioctyl sebacate, 3 to 7 parts of zinc oxide, 0.5 to 5 parts of stearic acid, 4 to 6 parts of antioxidant, 1 to 3 parts of sulfur, and 1 to 3 parts of accelerator; wherein the antioxidant is a combination of antioxidant RD, antioxidant MB and antioxidant 4010NA in a weight ratio of 1:1:3; and the accelerator is a combination of accelerator D and accelerator MBTS in a weight ratio of 1:4.

[0023] Alternatively, the middle rubber material of the middle rubber layer is made of the following raw materials in parts by weight: 100 parts of chloroprene rubber, 1 to 3 parts of stearic acid, 1 to 3 parts of protective wax 654, 2 to 4 parts of antioxidant 4010NA, 1 to 3 parts of antioxidant OCTAMINE, 30 to 40 parts of plasticizer DOS, 40 to 55 parts of carbon black 550, 30 to 40 parts of carbon black 774, 3 to 4 parts of vulcanizing agent STRUKTOL ZIMAG 29 / 43, and 1 to 3 parts of accelerator DM.

[0024] The reinforcing layer is made of polyester thread woven in a 36-spindle, 4-6-strand weaving method, and the polyester thread is 2000D-4000D polyester thread.

[0025] Preferably, the reinforcement layer is made of polyester thread woven in a 36-spindle, 6-strand weaving method.

[0026] Preferably, the polyester thread is 4000D polyester thread.

[0027] The thickness of the outer rubber layer is 1.0-2.0 mm.

[0028] The outer rubber material for preparing the outer rubber layer is one or a combination of chloroprene rubber, nitrile rubber, nitrile PVC rubber, HNBR rubber. Chloroprene rubber has excellent aging resistance, especially weather resistance, ozone resistance, and heat resistance. Its oil resistance is second only to nitrile rubber and better than other general rubbers. Preferably, the outer rubber material for preparing the outer rubber layer is chloroprene rubber.

[0029] Specifically, the outer rubber material of the outer rubber layer is made of the following raw materials in parts by weight: 100 parts of chloroprene rubber, 1 to 3 parts of stearic acid, 1 to 3 parts of protective wax 654, 2 to 4 parts of antioxidant 4010NA, 1 to 3 parts of antioxidant OCTAMINE, 30 to 40 parts of plasticizer DOS, 40 to 55 parts of carbon black 550, 30 to 40 parts of carbon black 774, 3 to 4 parts of vulcanizing agent STRUKTOL ZIMAG 29 / 43, and 1 to 3 parts of accelerator DM.

[0030] Another object of the present invention is to provide a method for preparing the light-weight flat-suckable refueling hose with a core wire, wherein the flat-suckable refueling hose comprises, from inside to outside, an inner rubber layer, a mesh layer, a core wire layer, a middle rubber layer, a reinforcement layer, and an outer rubber layer, and comprises the following steps:

[0031] Step (1), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the inner layer rubber material into the feeding port of the extruder, inserting the mandrel into the rubber extruder, and extruding the inner layer rubber material under vacuum conditions to obtain an intermediate tube blank containing an inner rubber layer;

[0032] Step (2), placing the intermediate tube blank with the mandrel on a mesh cloth winding machine, and winding the mesh cloth around the inner rubber layer with an overlap width of 3 to 5 mm to obtain an intermediate tube blank containing a mesh cloth layer;

[0033] Step (3), inserting the intermediate tube blank with the mandrel into a core wire / fiber wire winding machine, winding the core wire / high modulus low shrinkage fiber wire, the winding lead is 800-1500mm, and obtaining an intermediate tube blank containing a core wire layer;

[0034] Step (4), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the middle layer rubber material into the feeding port of the extruder, inserting the intermediate tube blank with the mandrel into the rubber extruder, and extruding the middle layer rubber material under vacuum conditions to obtain an intermediate tube blank containing a middle rubber layer;

[0035] Step (5), inserting the intermediate tube blank with the core rod into a braiding machine to braid the reinforcement layer to obtain the intermediate tube blank containing the braided layer;

[0036] Step (6), setting the temperature of each zone of the extruder to 40±5°C, 40±5°C, 50±5°C, and 55±5°C, respectively, feeding the outer layer rubber material into the feeding port of the extruder, inserting the intermediate tube blank with the mandrel into the rubber extruder, and extruding the outer layer rubber material under vacuum conditions to obtain a final tube blank containing an outer rubber layer;

[0037] Step (7), placing the final tube blank with the mandrel on a wrapping and unwrapping machine, and wrapping the water-wrapped cloth around the final tube blank;

[0038] Step (8), subjecting the final tube blank wrapped with the water-wrapped cloth to high-temperature steam vulcanization, unwinding the cloth, and obtaining a lightweight, suckable, flat refueling hose with a core wire.

[0039] In step (1), the vacuum condition is a vacuum degree ≤ 40 KPa.

[0040] In step (4), the vacuum condition is a vacuum degree ≤ 40 KPa.

[0041] In step (6), the vacuum condition is a vacuum degree ≤ 40 KPa.

[0042] In step (8), the vulcanization temperature is 150°C ± 3°C, and the vulcanization time is 60 ± 5 min.

[0043] Another object of the present invention is to provide a method for preparing the light-weight flat-absorbable refueling hose with a core wire, wherein the flat-absorbable refueling hose comprises, from inside to outside, an inner rubber layer, a reinforcement layer, a middle rubber layer, a core wire layer, a mesh layer, and an outer rubber layer, and comprises the following steps:

[0044] Step (1), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the inner layer rubber material into the feeding port of the extruder, inserting the mandrel into the rubber extruder, and extruding the inner layer rubber material under vacuum conditions to obtain an intermediate tube blank containing an inner rubber layer;

[0045] Step (2), inserting the intermediate tube blank with the core rod into a braiding machine to braid the reinforcement layer to obtain the intermediate tube blank containing the braided layer;

[0046] Step (3), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the middle layer rubber material into the feeding port of the extruder, adjusting the thickness of the rubber layer to a set thickness, inserting the intermediate tube blank with a mandrel into the rubber extruder, and extruding the middle layer rubber material under vacuum conditions to obtain an intermediate tube blank containing a middle rubber layer;

[0047] Step (4), inserting the intermediate tube blank with the mandrel into the core wire / fiber wire winding machine, winding the core wire / high modulus low shrinkage fiber wire, the winding lead is 900-1600mm, and obtaining the intermediate tube blank containing the core wire layer;

[0048] Step (5), placing the intermediate tube blank with the mandrel on a mesh cloth winding machine, and winding the mesh cloth around the core wire layer with an overlap width of 3 to 5 mm to obtain an intermediate tube blank containing a mesh cloth layer;

[0049] Step (6), setting the temperature of each zone of the extruder to 40±5°C, 40±5°C, 50±5°C, and 55±5°C, respectively, feeding the outer layer rubber material into the feeding port of the extruder, inserting the intermediate tube blank with the mandrel into the rubber extruder, and extruding the outer layer rubber material under vacuum conditions to obtain a final tube blank containing an outer rubber layer;

[0050] Step (7), placing the final tube blank with the mandrel on a wrapping and unwrapping machine, and wrapping the water-wrapped cloth around the final tube blank;

[0051] Step (8), subjecting the final tube blank wrapped with the water-wrapped cloth to high-temperature steam vulcanization, unwinding the cloth, and obtaining a lightweight, suckable, flat refueling hose with a core wire.

[0052] In step (1), the vacuum condition is a vacuum degree ≤ 40 KPa.

[0053] In step (3), the vacuum condition is a vacuum degree ≤ 40 KPa.

[0054] In step (6), the vacuum condition is a vacuum degree ≤ 40 KPa.

[0055] In step (8), the vulcanization temperature is 150°C ± 3°C, and the vulcanization time is 60 ± 5 min.

[0056] Beneficial effects of the present invention:

[0057] The refueling hose of the present invention adopts a six-layer structure. By controlling the thickness of each rubber layer and the structural design of each layer, the hose can be lightweight and flattened on the basis of meeting general requirements, and at the same time, the core wire can realize the signal transmission function. The specific performance is:

[0058] The refueling hose of the present invention is provided with a mesh layer to protect and position the core wire, and at the same time, to protect the inner and outer rubber layers during the use or movement of the hose, so as to prevent the core wire from breaking through the rubber layer and causing the core wire to leak out; a mesh with a thickness of 0.3-0.5 mm and a mesh density of 60-80 holes / 10 cm in the longitudinal and weft directions is used to form the mesh layer, so as to ensure that the rubber materials can penetrate each other to achieve sufficient bonding strength while having a certain tensile strength; nylon or nylon blended materials are used with high strength and good fatigue resistance to adapt to the frequent suction and curling performance of the hose; and because the modulus of nylon is relatively low, it can better adapt to the deformation of the hose body without causing stress concentration. At the same time, by controlling the overlap width of the mesh to be 3-5 mm, it is avoided that when the overlap width is too narrow, the meshes are easily separated during the movement of the hose, and when it is too wide, uneven adhesion may be caused. The middle rubber layer is provided to ensure that a continuous phase is formed between the layers of the hose, and a certain thickness ensures that the gaps between the mesh layer, the core wire layer and the reinforcing layer are fully filled to form a dense integrated structure. The core wire layer is provided with 40 to 60 high modulus low shrinkage fiber wires which are evenly distributed in a spiral structure. When the hose is subjected to external force, these high modulus low shrinkage fiber wires distributed in a spiral structure first bear these external forces, so that the hose forms a smaller axial deformation to protect the core wire, reduce the stress deformation of the core wire, avoid affecting signal transmission, and at the same time keep the hose to a certain flexibility.

[0059] The refueling hose of the present invention has the advantages of being able to be sucked flat, being lightweight, having a core wire, and having high explosive strength. It is easy to use, can be rolled up and unrolled on a small reel for storage, and can realize real-time signal transmission while refueling. It can be sucked flat, and after refueling, the remaining oil inside is first sucked out through the hose, thereby changing the problems of traditional hoses that a large amount of oil remains inside after refueling, the operator is difficult to drag, and the retraction and release is difficult, thereby greatly reducing the work intensity of the operator. DETAILED DESCRIPTION

[0060] The technical solution of the present invention is further described below through specific implementation methods.

[0061] Example 1

[0062] A light-weight, suckable flat refueling hose with a core wire, wherein the suckable flat refueling hose comprises, from inside to outside, an inner rubber layer, a mesh layer, a core wire layer, a middle rubber layer, a reinforcement layer, and an outer rubber layer; wherein the core wire layer is composed of a core wire and high modulus low shrinkage fiber.

[0063] The thickness of the inner rubber layer is 2.0 mm.

[0064] The inner layer material for preparing the inner rubber layer is made of the following raw materials in parts by weight: 100 parts of nitrile rubber KRYNAC2865C, 70 parts of natural gas semi-reinforced carbon black, 50 parts of clay, 20 parts of calcium carbonate, 10 parts of dioctyl sebacate, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant RD, 1 part of antioxidant MB, 3 parts of antioxidant 4010NA, 3 parts of sulfur, 0.3 accelerator D, and 1.2 parts of accelerator MBTS.

[0065] The thickness of the mesh layer is 0.4m; the mesh layer is formed by winding nylon mesh around the inner rubber layer, the mesh density in the longitudinal and weft directions is 70 holes / 10cm, and the weight of the mesh is 100g / m 2 The longitudinal and latitudinal tensile strength of the mesh is 1000N / 5cm, and the longitudinal and latitudinal elongation of the mesh is 30%.

[0066] The core wire layer is formed by 8 core wires and 40 high modulus low shrinkage fibers uniformly distributed in a spiral shape around the outer side of the mesh layer, and one core wire is inserted every 5 high modulus low shrinkage fibers.

[0067] The wire diameter of the core wire is 1.0 mm.

[0068] The high modulus low shrinkage fiber is 4000D aramid fiber.

[0069] The middle layer rubber material for preparing the middle rubber layer is made of the following raw materials in parts by weight: 100 parts of nitrile rubber KRYNAC2865C, 70 parts of natural gas semi-reinforcing carbon black, 50 parts of clay, 20 parts of calcium carbonate, 10 parts of dioctyl sebacate, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant RD, 1 part of antioxidant MB, 3 parts of antioxidant 4010NA, 3 parts of sulfur, 0.3 accelerator D, and 1.2 parts of accelerator MBTS.

[0070] The thickness of the middle rubber layer is 1.5 mm.

[0071] The reinforcement layer is woven from 4000D polyester thread in a 36-spindle, 6-strand weaving method.

[0072] The thickness of the outer rubber layer is 1.5 mm.

[0073] The outer rubber compound for preparing the outer rubber layer is made of the following raw materials in parts by weight: 100 parts of chloroprene rubber DCR-30, 1 part of stearic acid, 2 parts of protective wax 654, 2 parts of antioxidant 4010NA, 2 parts of antioxidant OCTAMINE, 30 parts of plasticizer DOS, 55 parts of carbon black 550, 40 parts of carbon black 774, 4 parts of vulcanizing agent STRUKTOL ZIMAG 29 / 43, and 1 part of accelerator DM.

[0074] The method for preparing the lightweight, flattenable refueling hose with a core wire in this embodiment includes the following steps:

[0075] Step (1), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the inner layer rubber material into the feeding port of the extruder, adjusting the rubber layer thickness to a set thickness of 2.0 mm, inserting the mandrel into the rubber extruder, evacuating to a vacuum degree of ≤40 KPa, extruding the inner layer rubber material, and obtaining an intermediate tube blank containing an inner rubber layer;

[0076] Step (2), placing the intermediate tube blank with the mandrel on a mesh cloth winding machine, and winding the mesh cloth to the outside of the inner rubber layer with an overlap width of 5 mm to obtain an intermediate tube blank containing a mesh cloth layer;

[0077] Step (3), inserting the intermediate tube blank with the mandrel into the core wire / fiber wire winding machine, winding the core wire and the 4000D aramid wire, the winding lead is 1500mm, and obtaining the intermediate tube blank containing the core wire layer;

[0078] Step (4), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the middle layer rubber material into the feeding port of the extruder, adjusting the thickness of the rubber layer to a set thickness of 1.5 mm, inserting the intermediate tube blank with the mandrel into the rubber extruder, evacuating to a vacuum degree of ≤40 KPa, extruding the middle layer rubber material, and obtaining an intermediate tube blank containing a middle rubber layer;

[0079] Step (5), inserting the intermediate tube blank with the core rod into a braiding machine, and braiding the reinforcement layer using a 36-spindle, 6-strand braiding method to obtain an intermediate tube blank containing a braided layer;

[0080] Step (6), setting the temperature of each zone of the extruder to 40±5°C, 40±5°C, 50±5°C, and 55±5°C, respectively, feeding the outer layer rubber into the feeding port of the extruder, adjusting the thickness of the rubber layer to a set thickness of 1.5 mm, inserting the intermediate tube with the mandrel into the rubber extruder, evacuating to a vacuum degree of ≤40 KPa, extruding the outer layer rubber, and obtaining a final tube containing an outer rubber layer;

[0081] Step (7), placing the final tube blank with the mandrel on a wrapping and unwrapping machine, and wrapping the water-wrapped cloth around the final tube blank;

[0082] Step (8), vulcanizing the final tube blank wrapped with the water-wrapped cloth in high-temperature steam at 150°C±3°C for 60±5min, unwinding the cloth, and obtaining a lightweight suckable flat refueling hose with a core wire.

[0083] Example 2

[0084] A light-weight, suckable flat refueling hose with a core wire, wherein the suckable flat refueling hose comprises, from inside to outside, an inner rubber layer, a reinforcement layer, a middle rubber layer, a core wire layer, a mesh layer, and an outer rubber layer; wherein the core wire layer is composed of a core wire and high modulus low shrinkage fiber.

[0085] The thickness of the inner rubber layer is 2.0 mm.

[0086] The inner rubber material for preparing the inner rubber layer is made of the following raw materials in parts by weight: 100 parts of nitrile rubber KRYNAC2865C, 70 parts of natural gas semi-reinforced carbon black, 50 parts of clay, 20 parts of calcium carbonate, 10 parts of dioctyl sebacate, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant RD, 1 part of antioxidant MB, 3 parts of antioxidant 4010NA, 3 parts of sulfur, 0.3 accelerator D, and 1.2 parts of accelerator MBTS.

[0087] The reinforcement layer structure is woven from 4000D polyester thread in a 36-spindle, 6-strand weaving method.

[0088] The thickness of the middle rubber layer is 1.5 mm.

[0089] The middle rubber material for preparing the middle rubber layer is made of the following raw materials in parts by weight: 100 parts of chloroprene rubber DCR-30, 1 part of stearic acid, 2 parts of protective wax 654, 2 parts of antioxidant 4010NA, 2 parts of antioxidant OCTAMINE, 30 parts of plasticizer DOS, 55 parts of carbon black 550, 40 parts of carbon black 774, 4 parts of vulcanizing agent STRUKTOL ZIMAG 29 / 43, and 1 part of accelerator DM.

[0090] The core wire layer is formed by 8 core wires and 40 high modulus low shrinkage fibers uniformly distributed in a spiral shape around the inner side of the mesh layer, and one core wire is inserted every 5 high modulus low shrinkage fibers.

[0091] The wire diameter of the core wire is 1.0 mm.

[0092] The high modulus low shrinkage fiber is 4000D aramid fiber.

[0093] The mesh layer has a thickness of 0.4 mm. The mesh layer is formed by wrapping nylon mesh with a 5 mm overlap width around the core layer; the mesh density in the longitudinal and latitudinal directions is 70 holes / 10 cm, and the weight of the mesh is 100 g / m 2 The longitudinal and latitudinal tensile strength of the mesh is 1000N / 5cm, and the longitudinal and latitudinal elongation of the mesh is 30%.

[0094] The thickness of the outer rubber layer is 1.5 mm.

[0095] The outer rubber compound for preparing the outer rubber layer is made of the following raw materials in parts by weight: 100 parts of chloroprene rubber DCR-30, 1 part of stearic acid, 2 parts of protective wax 654, 2 parts of antioxidant 4010NA, 2 parts of antioxidant OCTAMINE, 30 parts of plasticizer DOS, 55 parts of carbon black 550, 40 parts of carbon black 774, 4 parts of vulcanizing agent STRUKTOL ZIMAG 29 / 43, and 1 part of accelerator DM.

[0096] The method for preparing the lightweight, flattenable refueling hose with a core wire in this embodiment includes the following steps:

[0097] Step (1), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the inner layer rubber material into the feeding port of the extruder, adjusting the rubber layer thickness to a set thickness of 2.0 mm, inserting the mandrel into the rubber extruder, evacuating to a vacuum degree of ≤40 KPa, extruding the inner layer rubber material, and obtaining an intermediate tube blank containing an inner rubber layer;

[0098] Step (2), inserting the intermediate tube blank with the core rod into a braiding machine to braid the reinforcement layer to obtain the intermediate tube blank containing the braided layer;

[0099] Step (3), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the middle layer rubber material into the feeding port of the extruder, adjusting the thickness of the rubber layer to a set thickness of 1.5 mm, inserting the intermediate tube blank with the mandrel into the rubber extruder, evacuating to a vacuum degree of ≤40 KPa, extruding the middle layer rubber material, and obtaining an intermediate tube blank containing a middle rubber layer;

[0100] Step (4), inserting the intermediate tube blank with the mandrel into the core wire / fiber wire winding machine, winding the core wire and the 4000D aramid wire, the winding lead is 1600mm, and obtaining the intermediate tube blank containing the core wire layer;

[0101] Step (5), placing the intermediate tube blank with the mandrel on a mesh cloth winding machine, and winding the mesh cloth with an overlap width of 5 mm to the outside of the core wire layer to obtain an intermediate tube blank containing a mesh cloth layer;

[0102] Step (6), setting the temperature of each zone of the extruder to 40±5°C, 40±5°C, 50±5°C, and 55±5°C, respectively, feeding the outer layer rubber into the feeding port of the extruder, adjusting the thickness of the rubber layer to a set thickness of 1.5 mm, inserting the intermediate tube with the mandrel into the rubber extruder, evacuating to a vacuum degree of ≤40 KPa, extruding the outer layer rubber, and obtaining a final tube containing an outer rubber layer;

[0103] Step (7), placing the final tube blank with the mandrel on a wrapping and unwrapping machine, and wrapping the water-wrapped cloth around the final tube blank;

[0104] Step (8), vulcanizing the final tube blank wrapped with the water-wrapped cloth in high-temperature steam at 150°C±3°C for 60±5min, unwinding the cloth, and obtaining a lightweight suckable flat refueling hose with a core wire.

[0105] Comparative Example 1

[0106] Referring to the hose structure of Example 1, the thickness of the inner rubber layer is adjusted to 3.0 mm, and the rest is the same as the suckable flat refueling hose of Example 1.

[0107] Comparative Example 2

[0108] Referring to the hose structure of Example 2, the thickness of the outer rubber layer is adjusted to 0.5 mm, and the rest is the same as the suckable flat refueling hose of Example 2.

[0109] Comparative Example 3

[0110] Referring to the hose structure of Example 1, it includes, from inside to outside: an inner rubber layer, a core layer, a middle rubber layer, a reinforcement layer, and an outer rubber layer. The rest are the same as the suckable flat refueling hose of Example 1.

[0111] Comparative Example 4

[0112] Referring to the hose structure of Example 2, it includes, from inside to outside: an inner rubber layer, a reinforcement layer, a middle rubber layer, a core layer, and an outer rubber layer. The rest are the same as the suckable flat refueling hose of Example 2.

[0113] Comparative Example 5

[0114] Referring to the hose structure of Example 1, the aramid fiber in the core layer is adjusted to a steel wire with a wire diameter of 0.7 mm, and the rest is the same as the suckable flat refueling hose of Example 1.

[0115] Comparative Example 6

[0116] Referring to the hose structure of Example 1, aramid fibers are not provided in the core layer, and the rest is the same as the suckable flat refueling hose of Example 1.

[0117] The performances of Example 1, Example 2, Comparative Example 1, Comparative Example 2, Comparative Example 3, Comparative Example 4, Comparative Example 5 and Comparative Example 6 were examined according to Table 1.

[0118] Both the structures of Example 1 and Example 2 can meet the technical requirements of the product, indicating that the refueling hose with core wire of the present invention has the advantages of being suckable, lightweight, and being able to be repeatedly coiled on a small radius reel. Compared with Example 1, the thickness of the inner rubber layer of Comparative Example 1 is increased, which increases the overall wall thickness of the hose, resulting in the damage of the suckable flatness of the hose. Compared with Example 2, the thickness of the outer rubber layer of Comparative Example 2 is reduced to 0.5mm. Since the core wire diameter is 1.0mm and the mesh layer thickness is 0.4mm, the rubber material of the outer rubber layer is partially filled into the mesh layer or the core wire layer gap during the production process, resulting in the outer rubber layer that plays a protective role being too thin. In addition, fluctuations in the production process can easily lead to leakage of the mesh layer and the core wire, and the protective effect of the outer rubber layer cannot be achieved, especially causing wear inside the tube body during coiling and use. The mesh layer plays a vital role in the tube body with a core wire structure. It is the protective and fixing layer of the core wire. Together with the hose reinforcement layer and the middle rubber layer, it protects and positions the core wire. Compared with Example 1 and Example 2, Comparative Examples 3 and 4 respectively cancel the mesh layer, which can easily cause the core wire to be delaminated or separated during normal use, dragging, curling, twisting, and frequent suction of the hose, and even cause damage and cracking of the inner rubber layer or the outer rubber layer in extreme cases. Compared with Example 1, Comparative Example 5 adjusts the high modulus low shrinkage fiber in the core wire layer to a steel wire of the corresponding wire diameter, which greatly reduces the flexibility of the hose, resulting in the loss of lightweight and suction flatness of the hose. Compared with Example 1, Comparative Example 6 cancels the high modulus low shrinkage fiber in the core layer. The high modulus low shrinkage fiber in the core layer mainly plays the role of protecting the core wire in the hose from excessive stretching due to external force and causing signal loss. When the hose is subjected to axial force, the high modulus low shrinkage fiber line bears the force first, and under the action of external force, it is ensured that the hose is basically not stretched or produces extremely small deformation without affecting the internal core wire.

[0119] Table 1. Performance of the flattened refueling hoses of Examples 1-2 and Comparative Examples 1-6

[0120]

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightweight, flat, suckable refueling hose with a core wire, characterized by: The suckable flat refueling hose comprises, from inside to outside, an inner rubber layer, a mesh layer, a core layer, a middle rubber layer, a reinforcing layer, and an outer rubber layer; or, from inside to outside, an inner rubber layer, a reinforcing layer, a middle rubber layer, a core layer, a mesh layer, and an outer rubber layer; wherein the core layer consists of a core wire and a high modulus low shrinkage fiber.

2. The refueling hose according to claim 1, characterized in that: The thickness of the inner rubber layer is 1.0-2.5 mm; the inner rubber material for preparing the inner rubber layer is one or a combination of chloroprene rubber, nitrile rubber, nitrile PVC rubber, HNBR rubber, and preferably, the inner rubber material for preparing the inner rubber layer is nitrile rubber.

3. The refueling hose according to claim 1, characterized in that: The thickness of the mesh layer is 0.3-0.5 mm; the mesh layer is formed by winding the mesh outside the inner rubber layer or winding the mesh outside the core layer; the mesh density in the longitudinal and weft directions is 60-80 holes / 10 cm; the weight of the mesh is 70-100 g / m 2 The longitudinal and latitudinal tensile strength of the mesh is 800-1200N / 5cm; the longitudinal and latitudinal elongation of the mesh is 30-50%; the material of the mesh is one or a combination of nylon and nylon blends.

4. The refueling hose according to claim 1, characterized in that: The core wire layer is formed by 1 to 12 core wires and 40 to 60 high modulus low shrinkage fibers uniformly distributed in a spiral shape around the outside or inside of the mesh layer; the wire diameter of the core wire is 0.2 to 1.5 mm; the high modulus low shrinkage fiber is one of 2000D to 4000D polyester and aramid fibers.

5. The refueling hose according to claim 1, characterized in that: The thickness of the middle rubber layer is 0.5-1.5 mm; the middle rubber material for preparing the middle rubber layer is one or a combination of chloroprene rubber, nitrile rubber, nitrile PVC rubber, HNBR rubber; preferably, the middle rubber material for preparing the middle rubber layer is nitrile rubber or chloroprene rubber; more preferably, when the suckable flat refueling hose is composed of an inner rubber layer, a mesh layer, a core layer, a middle rubber layer, a reinforcement layer, and an outer rubber layer from the inside to the outside, the middle rubber material for preparing the middle rubber layer is the same as the inner rubber material for preparing the inner rubber layer; when the suckable flat refueling hose is composed of an inner rubber layer, a reinforcement layer, a middle rubber layer, a core layer, a mesh layer, and an outer rubber layer from the inside to the outside, the middle rubber material for preparing the middle rubber layer is the same as the outer rubber material for preparing the outer rubber layer.

6. The refueling hose according to claim 1, characterized in that: The reinforcing layer is made of polyester thread woven in a 36-spindle, 4-6-strand weaving mode; the polyester thread is 2000D-4000D polyester thread.

7. The refueling hose according to claim 6, characterized in that: The reinforcement layer is made of polyester thread woven in a 36-spindle, 6-strand weaving method; the polyester thread is 4000D polyester thread.

8. The refueling hose according to claim 1, characterized in that: The thickness of the outer rubber layer is 1.0-2.0 mm; the outer rubber material for preparing the outer rubber layer is one or a combination of chloroprene rubber, nitrile rubber, nitrile PVC rubber, HNBR rubber; preferably, the outer rubber material for preparing the outer rubber layer is chloroprene rubber.

9. A method for preparing the refueling hose according to claim 1, characterized in that: The following steps are involved: Step (1), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the inner layer rubber material into the feeding port of the extruder, inserting the mandrel into the rubber extruder, and extruding the inner layer rubber material under vacuum conditions to obtain an intermediate tube blank containing an inner rubber layer; Step (2), placing the intermediate tube blank with the mandrel on a mesh cloth winding machine, and winding the mesh cloth around the inner rubber layer with an overlap width of 3 to 5 mm to obtain an intermediate tube blank containing a mesh cloth layer; Step (3), inserting the intermediate tube blank with the mandrel into a core wire / fiber wire winding machine, winding the core wire / high modulus low shrinkage fiber wire, the winding lead is 800-1500mm, and obtaining an intermediate tube blank containing a core wire layer; Step (4), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the middle layer rubber material into the feeding port of the extruder, inserting the intermediate tube blank with the mandrel into the rubber extruder, and extruding the middle layer rubber material under vacuum conditions to obtain an intermediate tube blank containing a middle rubber layer; Step (5), inserting the intermediate tube blank with the core rod into a braiding machine to braid the reinforcement layer to obtain the intermediate tube blank containing the braided layer; Step (6), setting the temperature of each zone of the extruder to 40±5°C, 40±5°C, 50±5°C, and 55±5°C, respectively, feeding the outer layer rubber material into the feeding port of the extruder, inserting the intermediate tube blank with the mandrel into the rubber extruder, and extruding the outer layer rubber material under vacuum conditions to obtain a final tube blank containing an outer rubber layer; Step (7), placing the final tube blank with the mandrel on a wrapping and unwrapping machine, and wrapping the water-wrapped cloth around the final tube blank; Step (8), subjecting the final tube blank wrapped with the water-wrapped cloth to high-temperature steam vulcanization, unwinding the cloth, and obtaining a lightweight suckable flat refueling hose with a core wire; the vulcanization temperature is 150°C ± 3°C, and the vulcanization time is 60±5min.

10. A method for preparing the refueling hose according to claim 1, characterized in that: The following steps are involved: Step (1), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the inner layer rubber material into the feeding port of the extruder, inserting the mandrel into the rubber extruder, and extruding the inner layer rubber material under vacuum conditions to obtain an intermediate tube blank containing an inner rubber layer; Step (2), inserting the intermediate tube blank with the core rod into a braiding machine to braid the reinforcement layer to obtain the intermediate tube blank containing the braided layer; Step (3), setting the temperature of each zone of the extruder to 60±5°C, 60±5°C, 65±5°C, and 75±5°C, feeding the middle layer rubber material into the feeding port of the extruder, inserting the intermediate tube blank with the mandrel into the rubber extruder, and extruding the middle layer rubber material under vacuum conditions to obtain an intermediate tube blank containing a middle rubber layer; Step (4), inserting the intermediate tube blank with the mandrel into a core wire / fiber wire winding machine, winding the core wire / high modulus low shrinkage fiber wire, the winding lead is 900-1600mm, and obtaining an intermediate tube blank containing a core wire layer; Step (5), placing the intermediate tube blank with the mandrel on a mesh cloth winding machine, and winding the mesh cloth around the core wire layer with an overlap width of 3 to 5 mm to obtain an intermediate tube blank containing a mesh cloth layer; Step (6), setting the temperature of each zone of the extruder to 40±5°C, 40±5°C, 50±5°C, and 55±5°C, respectively, feeding the outer layer rubber material into the feeding port of the extruder, inserting the intermediate tube blank with the mandrel into the rubber extruder, and extruding the outer layer rubber material under vacuum conditions to obtain a final tube blank containing an outer rubber layer; Step (7), placing the final tube blank with the mandrel on a wrapping and unwrapping machine, and wrapping the water-wrapped cloth around the final tube blank; Step (8), subjecting the final tube blank wrapped with the water-wrapped cloth to high-temperature steam vulcanization, unwinding the cloth, and obtaining a lightweight suckable flat refueling hose with a core wire; the vulcanization temperature is 150°C ± 3°C, and the vulcanization time is 60±5min.

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