Low-temperature oiling machine pipe and forming equipment and manufacturing method thereof

Abstract

The invention discloses a low-temperature oiling machine pipe and forming equipment and a manufacturing method thereof, the low-temperature oiling machine pipe comprises a main pipe body, the main pipe body is provided with a pipe wall, and a pipe cavity for a conveyed oil product to pass through is formed in the pipe wall; an inner rubber layer, a first supporting layer, a second supporting layer and an outer rubber layer are sequentially arranged on the pipe wall of the main pipe body from inside to outside. The inner rubber layer is used for being in direct contact with a conveyed oil product; the first supporting layer is of a supporting structure formed by weaving a plurality of strands of fiber yarns; the second supporting layer is of a supporting structure formed by weaving a plurality of strands of fiber yarns; the outer rubber layer has a protection effect; a continuous wire is arranged between the first supporting layer and the second supporting layer and electrically connected with the ground of the oiling machine. Elastic parts are formed on the wire, and the plurality of elastic parts are linearly arranged in the length direction of the wire, so that the wire has elastic force for stretching or retracting in the axial direction of the main pipe body. According to the low-temperature oiling machine pipe, the tensile load borne by the low-temperature oiling machine pipe can be greatly reduced, fatigue fracture is not likely to be generated, and it is guaranteed that static electricity can be conducted out in time.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel dispenser pipes, and in particular to a low-temperature fuel dispenser pipe and a molding device and a manufacturing method thereof. Background Art

[0002] In gas stations in tropical, subtropical and even temperate regions, the reinforcement layer of the fuel dispenser pipe generally adopts a steel wire braided structure. This structure is strong, stable and has outstanding deformation resistance, and can effectively withstand large positive and negative pressures and external impacts. However, in cold regions where the temperature drops sharply to below -40℃, the traditional steel wire braided fuel dispenser pipe will harden significantly and lose the necessary flexibility, making refueling operations extremely inconvenient. Therefore, the fuel dispenser pipe used in cold regions must be able to maintain sufficient softness at low temperatures to ensure smooth operation.

[0003] The prior art usually changes the reinforcement layer from a single-layer steel wire braided structure to a single-layer fiber braided structure, and embeds a stainless steel wire conductor composed of a strand of stainless steel wire in a straight line along the axial direction of the product under the fiber braided layer. The function of this conductor is to achieve instant release of static electricity through electrical connection with the ground of the gas pump, effectively preventing the occurrence of explosion accidents at gas stations. However, in actual applications, there are the following problems: First, since the stainless steel wire conductor is in direct contact with the inner rubber layer, the conductor is easy to sink into the inner rubber layer during the production process, resulting in local thinning of the inner rubber layer thickness at the corresponding position, which in turn causes the inner rubber layer to crack, causing product leakage and failure; second, since the stainless steel wire conductor is arranged in a straight line along the axial direction of the product, when the product is bent for use, the conductor is subjected to a large tensile load in the bending direction, and is prone to fatigue fracture after repeated bending, thereby losing the static electricity conduction function. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a low-temperature refueling machine pipe and a forming device and a manufacturing method thereof, which can greatly reduce the tensile load, are not prone to fatigue fracture, and ensure that static electricity can be discharged in time.

[0005] The first aspect of the present invention provides a low-temperature fuel dispenser pipe, comprising a main body, the main body having a pipe wall, and a pipe cavity for the oil to be transported to pass through the pipe wall; the pipe wall of the main body is sequentially provided with an inner rubber layer, a first supporting layer, a second supporting layer and an outer rubber layer from the inside to the outside;

[0006] The inner rubber layer is used for direct contact with the transported oil; the first supporting layer is a supporting structure woven from a plurality of fiber strands; the second supporting layer is a supporting structure woven from a plurality of fiber strands; the outer rubber layer plays a protective role;

[0007] A continuous conductive wire is arranged between the first supporting layer and the second supporting layer, and the conductive wire is electrically connected to the ground of the fuel dispenser; an elastic portion is formed on the conductive wire, and a plurality of the elastic portions are linearly arranged in the length direction of the conductive wire, so that the conductive wire has an elastic force to stretch or retract in the axial direction of the main pipe.

[0008] In the first aspect of the present invention, as a preferred embodiment, the elastic portion is S-shaped or zigzag-shaped.

[0009] In the first aspect of the present invention, as a preferred embodiment, the conductive wire is formed by twisting a plurality of metal wires; each metal wire comprises 20-30 metal wires; the outer diameter of the metal wire is 0.1 mm; and the metal wire is a stainless steel round wire.

[0010] A second aspect of the present invention provides a low-temperature fuel dispenser pipe forming device, wherein the low-temperature fuel dispenser pipe forming device is used to process the low-temperature fuel dispenser pipe as described in any one of the first aspects of the present invention, comprising:

[0011] An extruder, the extruder is used for forming the inner rubber layer and the outer rubber layer;

[0012] A braiding machine, the braiding machine is used for braiding and forming the first supporting layer and the second supporting layer;

[0013] A wire forming machine, the wire forming machine comprising a stranding device and a forming device;

[0014] The stranding device comprises a wire-paying assembly and a wire-arranging and winding assembly; the wire-paying assembly is used to synchronously pay out a plurality of single-strand metal wires, and the wire-arranging and winding assembly is used to strand and wind up a plurality of single-strand metal wires that are synchronously paid out into a plurality of metal wires;

[0015] The forming device is connected to the stranding device, and is used to twist, shape and roll up the multiple groups of multi-strand metal wires output by the stranding device; the forming device includes a twisting assembly, a profiling assembly and a winding assembly; the twisting assembly is used to twist the multiple groups of multi-strand metal wires into metal ropes, the profiling assembly is used to extrude and shape the metal ropes, and the winding assembly is used to roll up the shaped metal ropes.

[0016] In the second aspect of the present invention, as a preferred embodiment, the pay-off assembly includes a pay-off frame, a conductor frame and a first stranding frame; the pay-off frame is provided with a plurality of wire wheel shafts, the wire wheel shafts are sleeved with wire wheels, and the wire wheels are used to fix single-strand metal wire coils; the conductor frame is arranged on the top of the pay-off frame, and a conductor roller is rotatably connected to the conductor frame, the first stranding frame is arranged on one side of the conductor frame, and a first stranding steel wheel is fixed on the first stranding frame, and a first gathering channel for multiple single-strand metal wires to pass through is formed in the first stranding steel wheel;

[0017] The pay-off frame includes a base, a column and a crossbeam; the column is vertically fixed to the base, and a plurality of the crossbeams are linearly arrayed on the column along the height direction; both sides of the crossbeam have inclined portions extending outward, and the inclined portions are used to be rotatably connected to the reel shaft, so that the ends of the reel shaft are arranged on both sides of the crossbeam in an upwardly inclined manner; a plurality of reel shafts are arranged in a rectangular array on the crossbeam on the pay-off frame, and a wire drum is arranged on the top of each vertical row of reel shafts, and the horizontal distance between the reel shafts and the wire drum in each vertical row gradually decreases from top to bottom.

[0018] In the second aspect of the present invention, as a preferred embodiment, the wire arrangement and winding assembly includes a wire arrangement and winding frame, and the wire arrangement and winding frame is equipped with a wire arrangement structure, a winding structure and a driving structure; the wire arrangement structure is docked with the wire pay-off assembly, and the wire arrangement structure includes an optical axis and a wire guide wheel rotatably connected to the wire arrangement and winding frame, and the optical axis wire arrangement device and the wire guide wheel form a wire arrangement gap for multiple strands of metal wire to pass through; the winding structure includes a large I-shaped wheel shaft, and the large I-shaped wheel shaft is provided with a large I-shaped wheel for winding multiple strands of metal wire; the driving structure has an output shaft, and the output shaft is transmission-connected to the large I-shaped wheel shaft, and the output shaft is transmission-connected to the optical axis through a chain sprocket.

[0019] In the second aspect of the present invention, as a preferred embodiment, the forming device has a forming frame and a winding frame, the forming frame is used to fix the strand assembly and the profiling assembly, the strand assembly and the profiling assembly are respectively arranged at opposite ends of the forming frame, and the winding frame is used to fix the winding assembly;

[0020] The stranding assembly includes a stranding drive, a rotating frame and a second stranding steel wheel; the second stranding steel wheel is fixed to the forming machine frame through a second stranding frame, and a second gathering channel for the metal rope to pass through is formed in the second stranding steel wheel;

[0021] The strand driving member has an output shaft; the rotating frame is fixed to the strand driving member output shaft, a mounting shaft is fixed on the rotating frame, the mounting shaft is arranged along the radial direction of the output shaft, and a plurality of groups of large I-shaped wheels wound with multiple strands of metal wire are sleeved on the mounting shaft.

[0022] In the second aspect of the present invention, as a preferred embodiment, the profiling assembly includes a profiling drive, a first pressing wheel and a second pressing wheel; the first pressing wheel and the second pressing wheel are both rotatably connected to the forming frame, a forming bottom mold is provided on the surface of the first pressing wheel, and a forming top mold is formed on the surface of the second pressing wheel, and when the forming bottom mold is engaged with the forming top mold, a forming mold cavity is formed between the forming bottom mold and the forming top mold; the profiling drive is fixed to the forming frame through a motor frame, and the profiling drive has an output shaft, and the output shaft of the profiling drive is respectively connected to the first pressing wheel and the second pressing wheel through a transmission assembly.

[0023] In the second aspect of the present invention, as a preferred embodiment, the winding assembly includes a winding drive, a winding guide wheel and a winding wheel; the winding guide wheel is rotatably connected to the winding frame, and the winding guide wheel is docked with the profiling assembly; the winding wheel is rotatably connected to the winding frame, the winding drive has an output shaft, and the winding drive output shaft is rotatably connected to the winding wheel; the winding drive provides power to wind the formed metal rope output by the profiling assembly onto the winding wheel.

[0024] A third aspect of the present invention provides a method for manufacturing a cryogenic fuel dispenser pipe, comprising the following steps:

[0025] Providing a forming device for a low-temperature fuel dispenser pipe as described in any one of the second aspects of the present invention;

[0026] Preparation step of S1 conductor: providing 20-30 rolls of stainless steel wire coils with an outer diameter of 0.1 mm, fixing the stainless steel wire coils on the wire wheels respectively; guiding the stainless steel wires through the circumference of the corresponding wire drum, passing through the first gathering channel, the wire arrangement gap and connecting with the large working wheel in sequence;

[0027] Open the driving structure; provide power through the driving structure to drive the optical axis and the large I-shaped wheel shaft to rotate, so that the multiple strands of metal wire pass through the wire arrangement gap and are wound on the large I-shaped wheel; cut the wire and take out the large I-shaped wheel wound with multiple strands of metal wire; install a new large I-shaped wheel, repeat the above steps, and output two groups of large I-shaped wheels wound with multiple strands of metal wire;

[0028] A plurality of large I-shaped wheels wound with multiple strands of metal wire are respectively sleeved on the mounting shafts on the rotating frame; the multiple strands of metal wire are guided to sequentially pass through the second gathering channel and the forming cavity, and then connected to the winding wheel after passing through the peripheral surface of the winding guide wheel;

[0029] The stranding drive, the profiling drive, and the winding drive are turned on; the stranding drive provides power to drive the rotating frame to rotate, and drives the large I-shaped wheels on the mounting shaft to rotate, so that the multiple strands of metal wires wound around the surface of the large I-shaped wheels are twisted into metal ropes; the profiling drive drives the first pressing wheel and the second pressing wheel to rotate, so that the forming bottom mold on the surface of the first pressing wheel engages with the forming top mold 431 on the surface of the second pressing wheel, and the metal rope in the forming mold cavity is extruded and formed; the winding drive provides power to wind the formed metal rope output by the profiling component onto the winding wheel;

[0030] The formed metal rope on the winding wheel is cut into a preset length to obtain a conductor;

[0031] S2 inner rubber layer preparation step: providing inner rubber layer raw materials, heating and extruding the inner rubber layer raw materials through an extruder to plasticize the inner rubber layer raw materials, and then extruding and molding through a mold to obtain the inner rubber layer;

[0032] S3: a step of preparing the support layer: providing a plurality of fiber strands, and winding the fiber strands on the outer surface of the inner rubber layer by a braiding machine to obtain a first support layer;

[0033] Adhere the wire to the surface of the first supporting layer along the axis direction of the first supporting layer, and the two ends of the wire extend from the two ends of the first supporting layer respectively;

[0034] Providing a plurality of fiber strands, and winding the fiber strands on the outer surface of the first supporting layer and the conductive wire by a braiding machine to obtain a second supporting layer;

[0035] S4 outer rubber layer preparation steps: providing outer rubber layer raw materials, heating and extruding the outer rubber layer raw materials through an extruder to plasticize the inner rubber layer raw materials, and then extruding through a mold, and coating the extruded rubber on the outer surface of the second supporting layer to form a uniform outer rubber layer.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The low-temperature fuel dispenser pipe of the present invention has a first support layer and a second support layer respectively arranged on the inner and outer layers of the conductor, adopts a double-layer fiber braiding structure, arranges the conductor between the two fiber layers, and prevents the conductor from sinking into the inner rubber layer during the production process. By arranging the elastic part, the conductor can be straightened and contracted like a spring when the low-temperature fuel dispenser pipe is bent, greatly reducing the tensile load, not prone to fatigue fracture, and ensuring that static electricity can be discharged in time.

[0038] The forming equipment of the low-temperature fuel dispenser pipe of the present invention uses a wire pay-off assembly to synchronously pay-off multiple single-strand metal wires, and uses a wire arrangement and winding assembly to combine and reel the synchronously released multiple single-strand metal wires into multiple-strand metal wires; multiple groups of multiple-strand metal wires output by the stranding device are sent to the forming device, and the multiple groups of multiple-strand metal wires are twisted into metal ropes by the stranding assembly, and the metal ropes are extruded and formed by the profiling assembly, and finally the formed metal ropes are reeled by the reeling assembly, and so on and so forth, so as to realize the production of metal wires for fuel dispenser pipes; in this embodiment, a wire pay-off frame is provided, and the wire wheel on the wire pay-off frame can synchronously pay-off multiple single-strand metal wires, and twist multiple groups of multiple-strand metal wires, and is used for combining stainless steel wires with smaller outer diameters and larger quantities. The profiling assembly can extrude a preset shape on the metal rope, so that the metal rope can have an axial elastic force, and when it is used as a wire in the fuel dispenser pipe, it is ensured that static electricity can be discharged in time, and when the fuel dispenser pipe is bent, the wire is straightened and contracted like a spring, which greatly reduces the tensile load and is not easy to produce fatigue fracture. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic structural diagram of a low-temperature fuel dispenser pipe according to Embodiment 1 of the present invention;

[0040] Figure 2 Schematic diagram of the cross section of the cryogenic refueling machine pipe according to Example 1 of the present invention;

[0041] Figure 3 This is a schematic diagram of the structure of the conductor of the low-temperature fuel dispenser pipe according to Example 1 of the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of a conductor of another implementation method of the low-temperature fuel dispenser pipe of Example 1 of the present invention;

[0043] Figure 5 It is a partial enlarged view of the wire of the low-temperature fuel dispenser pipe of Example 1 of the present invention;

[0044] Figure 6 It is a partial enlarged view of the wire of another embodiment of the low-temperature fuel dispenser pipe of Example 1 of the present invention;

[0045] Figure 7 This is a schematic structural diagram of the first supporting layer of the cryogenic refueling machine pipe according to Example 1 of the present invention;

[0046] Figure 8 It is a structural schematic diagram of a wire forming machine of a forming device for a low-temperature fuel dispenser pipe according to Embodiment 2 of the present invention;

[0047] Fig. 9 It is a structural schematic diagram of a wire pay-off assembly of a wire forming machine of a low-temperature fuel dispenser pipe forming device according to Embodiment 2 of the present invention;

[0048] Fig.10 It is a left side view of a wire pay-off assembly of a wire forming machine of a low-temperature fuel dispenser pipe forming device according to Embodiment 2 of the present invention;

[0049] Fig.11 It is a structural schematic diagram of a wire winding assembly of a wire forming machine of a low-temperature fuel dispenser pipe forming device according to Embodiment 2 of the present invention;

[0050] Fig.12 A top view of a wire winding assembly of a conductor forming machine of a low-temperature fuel dispenser pipe forming device according to Embodiment 2 of the present invention;

[0051] Fig.13 It is a structural schematic diagram of a stranding assembly and a pressing assembly of a wire forming machine of a forming device for a low-temperature fuel dispenser pipe according to Example 2 of the present invention;

[0052] Fig.14 A top view of a profiling assembly of a wire forming machine of a low-temperature fuel dispenser pipe forming device according to Embodiment 2 of the present invention;

[0053] Fig.15 This is a schematic structural diagram of the winding assembly of the wire forming machine of the low-temperature refueling machine pipe forming equipment of Example 2 of the present invention.

[0054] In the figure: 10, wire pay-off assembly; 11, wire pay-off frame; 111, wire wheel shaft; 1111, wire wheel; 112, base; 113, column; 114, crossbeam; 12, wire frame; 121, wire drum; 13, first stranding frame; 131, first stranding steel wheel; 20, wire arrangement and winding assembly; 21, wire arrangement and winding frame; 22, wire arrangement structure; 221, optical axis; 222, wire wheel; 23, winding structure; 231, large I-shaped wheel; 232, large I-shaped wheel shaft; 24, driving structure; 30, stranding assembly; 31, forming frame; 311, screw transmission dynamic structure; 312, hand wheel; 32, stranding drive member; 33, rotating frame; 331, mounting shaft; 34, second stranding steel wheel; 40, profiling assembly; 41, profiling drive member; 42, first pressing wheel; 421, forming bottom mold; 43, second pressing wheel; 431, forming top mold; 432, sliding bearing seat; 50, winding assembly; 51, winding drive member; 52, winding frame; 53, winding guide wheel; 54, winding wheel; 91, inner rubber layer; 92, first supporting layer; 93, wire; 931, elastic part; 94, second supporting layer; 95, outer rubber layer. DETAILED DESCRIPTION

[0055] Below, in conjunction with the accompanying drawings and specific embodiments, the invention is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except as otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0056] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0057] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] Embodiment 1:

[0060] Reference Figure 1-7This embodiment provides a low-temperature fuel dispenser pipe, including a main body, the main body having a pipe wall, and a tube cavity formed in the pipe wall for the transported oil to pass through; the pipe wall of the main body is sequentially provided with an inner rubber layer 91, a first support layer 92, a second support layer 94 and an outer rubber layer 95 from the inside to the outside; and a wire 93 is provided between the first support layer 92 and the second support layer 94, and the wire 93 is electrically connected to the ground of the fuel dispenser. An elastic part 931 is formed on the wire 93, and a plurality of the elastic parts 931 are linearly arranged in the length direction of the wire 93, so that the wire 93 has an elastic force to stretch or retract in the axial direction of the main body.

[0061] In this embodiment, the first support layer 92 and the second support layer 94 are respectively provided on the inner and outer layers of the conductor 93, and a double-layer fiber braiding structure is adopted to arrange the conductor 93 between the two fiber layers to prevent the conductor 93 from sinking into the inner rubber layer 91 during the production process. By providing the elastic portion 931, the conductor 93 can be straightened and contracted like a spring when the low-temperature fuel dispenser pipe is bent, which greatly reduces the tensile load received, is not prone to fatigue fracture, and ensures that static electricity can be discharged in time.

[0062] Specifically, the main function of the inner rubber layer 91 is to be in direct contact with the oil being transported to ensure that no leakage or corrosion occurs. It can be made of nitrile rubber (NBR), fluororubber (FKM), polyethylene (PE), polyurethane (PU), etc., so that it not only has corresponding low-temperature resistance but also has excellent chemical stability in a low-temperature environment.

[0063] The main function of the outer rubber layer 95 is to protect the low-temperature fuel dispenser pipe from the influence of the external environment such as mechanical damage, ultraviolet rays, chemical corrosion, etc., while ensuring the flexibility and durability of the low-temperature fuel dispenser pipe. Chlorinated polyethylene rubber (CPE), rubber-plastic alloy (NBR / PVC blended rubber), fluororubber (FKM), polyurethane (PU), ethylene-propylene rubber (EPDM), etc. can be used, with excellent weather resistance, oil resistance, flame retardancy, low temperature resistance, wear resistance, UV resistance and corrosion resistance.

[0064] Please refer to Figure 7 As shown, the first support layer 92 and the second support layer 94 of the present embodiment are both woven from a plurality of strands of high-strength polyester fibers, such as aramid fibers (such as Kevlar) or polyurethane, etc. The fiber filaments are preferably flat yarns with high flexibility, so that the fuel dispenser pipe maintains its mechanical properties and strength at low temperatures and has good cold resistance.

[0065] Please refer to Figure 3 As shown, the elastic part of this embodiment can be zigzag-shaped, and several zigzag-shaped wires are connected end to end to form a continuous wire 93 buried between the first support layer 92 and the second support layer 94. While ensuring excellent elastic force, it has the advantages of simple structure and low processing cost.

[0066] Please refer to Figure 4-6 As shown, the elastic portion of this embodiment can be S-shaped, and several S-shaped portions are connected end to end to form a continuous conductor 93 buried between the first supporting layer 92 and the second supporting layer 94. The S-shaped elastic portion has a rounded transition section, which greatly improves durability while ensuring excellent elastic force.

[0067] The conductor 93 is formed by twisting a plurality of metal wires to form a Figure 5 The metal rope structure shown further improves the flexibility of the conductor 93.

[0068] As one variation of the wire 93, the wire 93 may also be formed by winding a single strand of metal wire to form a Figure 6 The metal spring structure shown further improves the axial ductility of the wire 93 and improves its durability.

[0069] Of course, the shape of the elastic portion may also be a combination of a zigzag shape and an S shape, both of which can provide elastic force for the wire 93 to stretch or retract in the axial direction of the main tube.

[0070] The wire 93 of this embodiment is buried between the first supporting layer 92 and the second supporting layer 94. The wire 93 has an arc on the radial cross-section of the main pipe body that is adapted to the wall of the fuel dispenser pipe, so that it can be smoothly fixed to one side of the inside of the fuel dispenser pipe, providing a connection surface that fits the first supporting layer 92 and the second supporting layer 94 on the inner and outer sides.

[0071] The conductor 93 is formed by plying a plurality of continuous metal round wires; the metal round wires in this embodiment are stainless steel wires, which can maintain sufficient toughness and durability at low temperatures.

[0072] In some embodiments, a middle rubber layer is also included, and the middle rubber layer is arranged between the first support layer 92 and the second support layer 94. By arranging the middle rubber layer between the two support layers as a buffer structure, the first support layer 92 and the second support layer 94 are ensured to be bonded together, and the first support layer 92 and the second support layer 94 are prevented from rubbing against each other during use, resulting in early damage. The materials that can be used for the middle rubber layer include fluororubber (FKM), polyurethane (PU), nitrile rubber (NBR), etc. These materials have good low temperature resistance, oil resistance and aging resistance, and can ensure that the fuel dispenser pipeline still maintains good interlayer adhesion, sealing and mechanical strength under low temperature conditions, avoiding problems such as material embrittlement, interlayer separation or oil leakage caused by low temperature.

[0073] Furthermore, the wire 93 of this embodiment is formed by 50-60 stainless steel wires with an outer diameter of 0.1 mm, and the 50-60 stainless steel wires are divided into several strands and twisted into the following Figure 5 The metal rope structure shown or Figure 6The metal spring structure shown.

[0074] The structure of multiple filaments shares external forces, thereby improving the flexibility, low-temperature brittleness resistance, conductivity and fatigue resistance of the conductor 93, reducing damage caused by uneven force or external temperature changes, and effectively preventing brittle fracture in low-temperature environments.

[0075] In some embodiments, a first pipe joint and a second pipe joint are further included, the first pipe joint and the second pipe joint are respectively arranged at the two ends of the main pipe body, and the first pipe joint and the second pipe joint are both metal joints; the wire 93 is arranged parallel to the axis of the main pipe body, and the two ends of the wire 93 extend from the opposite ends of the main pipe body, and the two ends of the wire 93 are respectively connected to the first pipe joint and the second pipe joint. By connecting the wire 93 to the metal joints at the two ends of the main pipe body, static electricity is released in time to prevent explosion accidents at gas stations.

[0076] The low-temperature refueling machine pipe with high electrostatic conductivity and safety performance described in this embodiment is also suitable for marine refueling machine pipes and other refueling machine pipe products that require the refueling machine pipe product to be soft, easy to install and bend due to restrictions on the use site.

[0077] Embodiment 2:

[0078] Please refer to Figure 8-15 As shown, this embodiment provides a low-temperature fuel dispenser pipe forming device. The low-temperature fuel dispenser pipe forming device of this embodiment is mainly used to process the low-temperature fuel dispenser pipe as described in Example 1, including:

[0079] An extruder, the extruder is used for molding the inner rubber layer 91 and the outer rubber layer 95;

[0080] A braiding machine, the braiding machine is used for braiding the first supporting layer 92 and the second supporting layer 94;

[0081] A wire forming machine, the wire forming machine comprising a stranding device and a forming device;

[0082] Specifically, the inner rubber layer 91 and the outer rubber layer 95 of the present embodiment are extruded by a screw extruder; in some embodiments, a three-roll calender is also included, and the three-roll calender is used for forming the middle rubber layer; the braiding machine can be a single-disc braiding machine, and the first support layer 92 and the second support layer 94 are braided twice separately; a double-disc braiding machine can also be used, and the first support layer 92, the middle rubber layer, the conductor 93, and the second support layer 94 are braided once.

[0083] The extruder and braiding machine described above are both existing structures, and those skilled in the art can understand that the wire forming machine of this embodiment includes a stranding device and a forming device;

[0084] The stranding device includes a pay-off assembly 10 and a wire arrangement and winding assembly 20 which are arranged in sequence; the pay-off assembly 10 is used to synchronously pay-off multiple single-strand metal wires, and the wire arrangement and winding assembly 20 is used to arrange the multiple single-strand metal wires that are synchronously paid out to avoid overlapping and to strand and wind them into multiple metal wires.

[0085] The forming device is connected to the stranding device, and is used to twist and form multiple groups of multi-strand metal wires output by the stranding device; the forming device includes a stranding assembly 30, a profiling assembly 40 and a winding assembly 50; the stranding assembly 30 is used to twist multiple groups of multi-strand metal wires into metal ropes, the profiling assembly 40 is used to extrude and form the metal ropes, and the winding assembly 50 is used to wind the formed metal ropes.

[0086] Please refer to Figure 9-10 As shown, the wire-paying assembly 10 includes a wire-paying frame 11, a wire frame 12 and a first stranding frame 13; the wire-paying frame 11 is provided with a plurality of wire wheel shafts 111, and the wire wheel shafts 111 are sleeved with wire wheels 1111, and the wire wheels 1111 are used to fix single-strand metal wire coils; the wire frame 12 is arranged on the top of the wire-paying frame 11, and a wire roller 121 is rotatably connected to the wire frame 12, and the first stranding frame 13 is arranged on one side of the wire frame 12, and a first stranding steel wheel 131 is fixed to the first stranding frame 13, and a first gathering channel for multiple single-strand metal wires to pass through is formed in the first stranding steel wheel 131.

[0087] During the production process, the wire wheels 1111 on the plurality of wire wheel shafts 111 synchronously release multiple single-strand metal wires, which are guided by the wire drum 121 into the first gathering channel of the first stranding steel wheel 131 to gather into a group of multiple-strand metal wires.

[0088] The pay-off rack 11 of this embodiment includes a base 112, a column 113 and a crossbeam 114; the base 112 is fixed to the ground by supporting feet, and two columns 113 are vertically fixed at both ends of the base 112, and a plurality of crossbeams 114 are linearly arrayed on the columns 113 along the height direction; both sides of the crossbeam 114 have outwardly extending inclined portions, and the inclined portions are used to be rotatably connected to the reel shaft 111, so that the ends of the reel shaft 111 are arranged on both sides of the crossbeam 114 with an upward tilt, to prevent the reel 1111 from falling off the reel shaft 111.

[0089] A plurality of the reel shafts 111 are arranged in a rectangular array on the crossbeam 114 on the pay-off frame 11, and a wire drum 121 is provided on the top of each vertical row of reel shafts 111. The horizontal distance between the reel shafts 111 and the wire drum 121 in each vertical row gradually decreases from top to bottom, leaving space for the passage of the metal wire so that the metal wires will not interfere with each other.

[0090] The pay-off frame 11 of the present embodiment is provided with reel shafts 111 on both sides, and the reel shafts 111 are arranged in a 3*5 matrix on the pay-off frame 11, that is, the number of beams 114 is 5, and 3 reel shafts 111 are fixed on the inclined portion on one side of each layer of beams 114, so that one pay-off frame 11 can accommodate 30 reel shafts 111, and 30 metal wires can be combined into a roll, meeting the production requirements of stainless steel wire conductors 93 with smaller outer diameter and larger number in the fuel dispenser pipe.

[0091] Please refer to Figure 11-12 As shown, the cable winding assembly 20 of this embodiment includes a cable winding frame 21, on which a cable arrangement structure 22, a winding structure 23 and a driving structure 24 are installed;

[0092] The wire arrangement structure 22 is docked with the wire pay-off assembly 10, and includes an optical axis 221 and a wire pulley 222 rotatably connected to the wire arrangement winding frame 21. The optical axis 221 and the wire pulley 222 form a wire arrangement gap for multiple strands of metal wires to pass through; the height of the wire arrangement gap is adapted to the diameter of a single metal wire, and the surface of the optical axis 221 is smooth for the metal wires to slide on it. When the metal wires overlap, they are blocked by the wire arrangement gap, and the overlapping metal wires slide along the surface of the optical axis 221, thereby separating the overlapping metal wires and arranging them neatly for delivery to the winding mechanism.

[0093] The winding structure 23 includes a large I-shaped wheel shaft 232, and a large I-shaped wheel 231 for winding multiple strands of metal wire is arranged on the large I-shaped wheel shaft 232;

[0094] The driving structure 24 has an output shaft, which is in driving connection with the large I-shaped wheel shaft 232, and is in driving connection with the optical axis 221 via a chain sprocket;

[0095] The driving structure 24 provides power to drive the optical axis 221 and the large I-wheel shaft 232 to rotate; the active rotation of the optical axis 221 actively combs the multiple strands of metal wires passing through the wire arrangement structure 22, so that the multiple strands of metal wires are neatly arranged and wound on the large I-wheel 231 after passing through the wire arrangement gap; and multiple groups of large I-wheels 231 wound with multiple strands of metal wires are output to the forming device through the stranding device.

[0096] Please refer to the forming device shown in 13-15, which has a forming frame 31 and a winding frame 52, wherein the forming frame 31 is used to fix the strand assembly 30 and the press assembly 40, and the strand assembly 30 and the press assembly 40 are respectively arranged at opposite ends of the forming frame 31, and the winding frame 52 is used to fix the winding assembly 50.

[0097] The stranding assembly 30 includes a stranding driving member 32, a rotating frame 33 and a second stranding steel wheel 34; the second stranding steel wheel 34 is fixed to the forming machine frame 31 through a second stranding frame, and a second gathering channel for the metal rope to pass through is formed in the second stranding steel wheel 34;

[0098] The strand driving member 32 has an output shaft; the rotating frame 33 is fixed to the output shaft of the strand driving member 32, and a mounting shaft 331 is fixed to the rotating frame 33. The mounting shaft 331 is arranged along the radial direction of the output shaft, and a plurality of groups of large I-shaped wheels 231 wound with multiple strands of metal wire are sleeved on the mounting shaft 331;

[0099] The twisting drive 32 provides power to drive the rotating frame 33 to rotate, and drives several large I-shaped wheels 231 on the mounting shaft 331 to rotate, and the multiple strands of metal wires wrapped around the surface of the large I-shaped wheels 231 are twisted into metal ropes, which are gathered through the second gathering channel and then sent to the pressing assembly 40.

[0100] like Figure 13-14 As shown, the pressing assembly 40 includes a pressing drive 41, a first pressing wheel 42 and a second pressing wheel 43;

[0101] The first pressing wheel 42 and the second pressing wheel 43 are both rotatably connected to the molding frame 31. A molding bottom mold 421 is provided on the surface of the first pressing wheel 42, and a molding top mold 431 is formed on the surface of the second pressing wheel 43. When the molding bottom mold 421 and the molding top mold 431 are meshed, a molding cavity is formed between the molding bottom mold 421 and the molding top mold 431.

[0102] The profiling drive component 41 is fixed to the forming frame 31 through a motor frame. The profiling drive component 41 has an output shaft. The output shaft of the profiling drive component 41 is respectively connected to the first pressing wheel 42 and the second pressing wheel 43 through a transmission assembly. The profiling drive component 41 drives the first pressing wheel 42 and the second pressing wheel 43 to rotate, so that the forming bottom mold 421 on the surface of the first pressing wheel 42 is engaged with the forming top mold 431 on the surface of the second pressing wheel 43, and the metal rope in the forming mold cavity is extruded.

[0103] Furthermore, the second pressing wheel 43 is connected to the forming frame 31 through a sliding bearing seat 432, so that the second pressing wheel 43 can be closer to or farther away from the first pressing wheel 42; the sliding bearing seat 432 is connected to the forming frame 31 through a screw transmission structure 311, and a handwheel 312 is provided at the end of the screw transmission structure 311. By rotating the handwheel 312, the sliding bearing seat 432 is translated on the forming frame 31, so that the second pressing wheel 43 can be closer to or farther away from the first pressing wheel 42, thereby adjusting the width of the molding cavity.

[0104] The molding cavity can be an S-shaped cavity or a zigzag-shaped cavity, so that a continuous S-shape or zigzag shape with a connected tail is formed on the metal rope in the molding cavity, so that the finished metal wire produced by the metal wire stranding molding device of this embodiment has a certain axial elastic force, so that the wire 93 is straightened and contracted like a spring when the fuel dispenser pipe is bent, which greatly reduces the tensile load, is not easy to produce fatigue fracture, and ensures that static electricity can be discharged in time.

[0105] Please refer to Fig.15 As shown, the winding assembly 50 includes a winding drive 51, a winding guide wheel 53 and a winding wheel 54; the winding guide wheel 53 is rotatably connected to the winding frame 52, and the winding guide wheel 53 is connected to the profiling assembly 40; the winding wheel 54 is rotatably connected to the winding frame 52, and the winding drive 51 has an output shaft, and the output shaft of the winding drive 51 is rotatably connected to the winding wheel 54. The winding guide wheel 53 guides the direction and position of the formed metal rope, controls the winding direction and position of the formed metal rope, and also adjusts the tension of the formed metal rope to a certain extent. The winding drive 51 provides power to neatly wind the formed metal rope output by the profiling assembly 40 onto the winding wheel 54.

[0106] In some other embodiments, an arc pressing assembly may be provided between the profiling assembly 40 and the winding assembly 50, and the arc pressing assembly is used to form an arc that is adapted to the main body on the cross section of the formed metal rope, so that the wire 93 made of the formed metal rope can better fit the first support layer 92 and the second support layer 94. The arc pressing assembly includes a third pressing wheel and a fourth pressing wheel that are meshed with each other, and the third pressing wheel and the fourth pressing wheel are both rotatably connected to the forming frame 31; the third pressing wheel is formed with an arc-shaped protrusion in the circumference, and the fourth pressing wheel is formed with an arc-shaped depression in the circumference, and the arc-shaped protrusion is adapted to the arc-shaped depression, so that an arc gap is formed between the third pressing wheel and the fourth pressing wheel, and when the formed metal rope passes through the arc gap, a corresponding arc is squeezed out on its cross section.

[0107] The forming equipment of the low-temperature fuel dispenser pipe of the present embodiment uses a wire pay-off assembly 10 to synchronously pay-off multiple single-strand metal wires, and uses a wire arrangement and winding assembly 20 to combine and wind up the multiple single-strand metal wires that are synchronously paid out into multiple strands of metal wires; multiple groups of multi-strand metal wires output by the stranding device are sent to the forming device, and the multiple groups of multi-strand metal wires are twisted into metal ropes by a twisting assembly 30, and the metal ropes are extruded and formed by a profiling assembly 40, and finally the formed metal ropes are wound up by a winding assembly 50, and this reciprocating process is repeated to realize the production of metal conductors for fuel dispenser pipes; the present embodiment provides a wire pay-off frame 11, and a wire wheel 1111 on the wire pay-off frame 11 can accommodate 30 rolls to synchronously pay out multiple single-strand metal wires, and twist multiple groups of multi-strand metal wires, so as to combine stainless steel wires with smaller outer diameters and larger quantities. A preset shape can be extruded on the metal rope through the press component 40, so that the metal rope can have axial elastic force. When it is used as a conductor 93 in the fuel dispenser pipe, it can ensure that static electricity can be discharged in time. When the fuel dispenser pipe is bent, the conductor 93 is straightened and contracted like a spring, which greatly reduces the tensile load and is not prone to fatigue fracture.

[0108] Embodiment 3:

[0109] This embodiment provides a method for manufacturing a low-temperature fuel dispenser pipe based on Embodiment 2, comprising the following steps:

[0110] Providing a forming device for a low-temperature fuel dispenser pipe as described in Example 2;

[0111] S1: preparation step of the conductor 93: providing 20-30 coils of stainless steel wire with an outer diameter of 0.1 mm, passing the stainless steel wire coils through the conductor forming machine to obtain the conductor 93;

[0112] S2: a step of preparing the inner rubber layer 91: providing a raw material for the inner rubber layer, heating and extruding the raw material for the inner rubber layer through an extruder to plasticize the raw material for the inner rubber layer, and then extruding and molding the raw material through a mold to obtain the inner rubber layer 91;

[0113] S3: step of preparing the support layer: providing a plurality of fiber strands, and winding the fiber strands on the outer surface of the inner rubber layer 91 through a braiding machine to obtain a first support layer 92;

[0114] Adhere the wire 93 to the surface of the first supporting layer 92 along the axis direction of the first supporting layer 92, and the two ends of the wire 93 extend from the two ends of the first supporting layer 92 respectively;

[0115] Providing a middle rubber layer raw material, pressing the middle rubber layer raw material into a film with a thickness of about 0.3-0.4mm through a three-roll calender, cutting the film into several continuous middle rubber strips according to the width required by the production specification before the film is led out of the roller, and conveying the middle rubber strips to the isolation powder tank through a conveyor belt and then collecting them, ensuring that the isolation powder adheres evenly to prevent the film from sticking; wrapping the middle rubber strips on the surface of the first supporting layer 92 to form a supporting middle rubber layer, and then attaching the wire 93 to the surface of the middle rubber layer;

[0116] Providing a plurality of fiber strands, and winding the fiber strands on the outer surface of the middle rubber layer and the conductor 93 through a braiding machine to obtain a second support layer 94;

[0117] S4 is a step of preparing the outer rubber layer 95 : providing an outer rubber layer raw material, heating and extruding the outer rubber layer raw material through an extruder to plasticize the outer rubber layer raw material, and then extruding it through a mold, and coating the extruded rubber on the outer surface of the second supporting layer 94 to form a uniform outer rubber layer 95 .

[0118] The preparation steps of the S1 conductor 93 specifically include providing 20-30 rolls of stainless steel wire coils with an outer diameter of 0.1 mm, fixing the stainless steel wire coils on the wire wheels 1111 respectively; guiding the stainless steel wires through the circumference of the corresponding wire rollers 121, passing through the first gathering channel, the wire arrangement gap and connecting with the large working wheel in sequence;

[0119] The driving structure 24 is turned on; the driving structure 24 provides power to drive the optical axis 221 and the large I-shaped wheel shaft 232 to rotate, so that the multiple strands of metal wire pass through the wire arrangement gap and are wound on the large I-shaped wheel 231; the wire is cut, and the large I-shaped wheel 231 wound with multiple strands of metal wire is taken out; a new large I-shaped wheel 231 is installed, and the above steps are repeated to output two groups of large I-shaped wheels 231 wound with multiple strands of metal wire;

[0120] A plurality of large I-shaped wheels 231 wound with multiple strands of metal wire are respectively sleeved on the mounting shafts 331 on the rotating frame 33; the multiple strands of metal wire are guided to sequentially pass through the second gathering channel and the forming cavity, and then connected to the winding wheel 54 after passing through the circumference of the winding guide wheel 53;

[0121] The stranding drive member 32, the profiling drive member 41, and the winding drive member 51 are turned on; the stranding drive member 32 provides power to drive the rotating frame 33 to rotate, and drives the large I-shaped wheels 231 on the mounting shaft 331 to rotate, and the multiple strands of metal wires wound around the surface of the large I-shaped wheels 231 are twisted into metal ropes; the profiling drive member 41 drives the first pressing wheel 42 and the second pressing wheel 43 to rotate, so that the forming bottom mold 421 on the surface of the first pressing wheel 42 is engaged with the forming top mold 431 on the surface of the second pressing wheel 43, and the metal rope in the forming mold cavity is extruded and formed; the winding drive member 51 provides power to wind the formed metal rope output by the profiling assembly 40 onto the winding wheel 54;

[0122] The formed metal rope on the winding wheel 54 is cut into a preset length to obtain the conductor 93 .

[0123] The preparation step of the S3 supporting layer in the above embodiment is implemented by a single-disc braiding machine. As a variation of the preparation step of the S3 supporting layer, another embodiment of the preparation step of the S3 supporting layer is provided below. The preparation step of the S3 supporting layer in the following embodiment is implemented by a double-disc braiding machine:

[0124] The preparation steps of the S3 support layer include:

[0125] Provide the raw materials for the middle rubber layer, and extrude the raw materials for the middle rubber layer into a film with a thickness of about 0.3-0.4mm through a three-roll calender. Use a cutter to cut the film into several continuous middle rubber strips according to the width required by the production specifications before the film is discharged from the roller. The middle rubber strips are transported to the isolation powder tank through a conveyor belt and then collected to ensure that the isolation powder adheres evenly and prevent the film from sticking;

[0126] A plurality of fiber strands are provided, and the fiber strands are stacked and wound on the outer surface of the inner rubber layer 91 by a double-disk braiding machine to form a first braided layer; then the middle rubber strip is gradually fed in and wrapped on the surface of the first braided layer; then the conductive wire 93 is gradually fed in along the axial direction of the first braided layer and attached to the surface of the middle rubber strip; the fiber strands are stacked and wound on the outer surfaces of the middle rubber strip and the conductive wire 93 by a double-disk braiding machine to form a second braided layer, and the middle rubber strip and the conductive wire 93 are combined with the first braided layer as a whole, and the first supporting layer 92, the middle rubber layer, the conductive wire 93, and the second supporting layer 94 are woven into shape at one time in this reciprocating manner, thereby greatly improving production efficiency.

[0127] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A low temperature fuel dispenser pipe, characterized in that: The main body comprises a main body having a tube wall, and a tube cavity is formed in the tube wall for the oil to be transported to pass through; the tube wall of the main body is provided with an inner rubber layer, a first supporting layer, a second supporting layer and an outer rubber layer in sequence from the inside to the outside; The inner rubber layer is used for direct contact with the transported oil; the first supporting layer is a supporting structure woven from a plurality of fiber strands; the second supporting layer is a supporting structure woven from a plurality of fiber strands; the outer rubber layer plays a protective role; A continuous conductive wire is arranged between the first supporting layer and the second supporting layer, and the conductive wire is electrically connected to the ground of the fuel dispenser; an elastic portion is formed on the conductive wire, and a plurality of the elastic portions are linearly arranged in the length direction of the conductive wire, so that the conductive wire has an elastic force to stretch or retract in the axial direction of the main pipe.

2. A low-temperature fuel dispenser pipe according to claim 1, characterized in that: The elastic portion is in an S-shape or a zigzag shape.

3. A low-temperature fuel dispenser pipe according to claim 2, characterized in that: The conductor is formed by twisting a plurality of metal wires; each metal wire comprises 20-30 metal wires; the outer diameter of the metal wire is 0.1 mm; and the metal wire is a stainless steel round wire.

4. A low-temperature fuel dispenser pipe forming device, characterized in that: The forming equipment of the low-temperature fuel dispenser pipe is used for processing the low-temperature fuel dispenser pipe according to any one of claims 1 to 3, comprising: An extruder, the extruder is used for forming the inner rubber layer and the outer rubber layer; A braiding machine, the braiding machine is used for braiding and forming the first supporting layer and the second supporting layer; A wire forming machine, the wire forming machine comprising a stranding device and a forming device; The stranding device comprises a wire-paying assembly and a wire-arranging and winding assembly; the wire-paying assembly is used to synchronously pay out a plurality of single-strand metal wires, and the wire-arranging and winding assembly is used to strand and wind up a plurality of single-strand metal wires that are synchronously paid out into a plurality of metal wires; The forming device is connected to the stranding device, and is used to twist, shape and roll up the multiple groups of multi-strand metal wires output by the stranding device; the forming device includes a twisting assembly, a profiling assembly and a winding assembly; the twisting assembly is used to twist the multiple groups of multi-strand metal wires into metal ropes, the profiling assembly is used to extrude and shape the metal ropes, and the winding assembly is used to roll up the shaped metal ropes.

5. The forming equipment of the low temperature fuel dispenser pipe according to claim 4, characterized in that: The wire-paying assembly comprises a wire-paying frame, a wire-conducting frame and a first stranding frame; the wire-paying frame is provided with a plurality of wire-wheel shafts, the wire-wheel shafts are sleeved with wire wheels, and the wire wheels are used to fix single-strand metal wire coils; the wire-conducting frame is arranged on the top of the wire-paying frame, and a wire roller is rotatably connected to the wire-conducting frame, and the first stranding frame is arranged on one side of the wire-conducting frame, and a first stranding steel wheel is fixed on the first stranding frame, and a first gathering channel for multiple single-strand metal wires to pass through is formed in the first stranding steel wheel; The pay-off frame includes a base, a column and a crossbeam; the column is vertically fixed to the base, and a plurality of the crossbeams are linearly arrayed on the column along the height direction; both sides of the crossbeam have inclined portions extending outward, and the inclined portions are used to be rotatably connected to the reel shaft, so that the ends of the reel shaft are arranged on both sides of the crossbeam in an upwardly inclined manner; a plurality of reel shafts are arranged in a rectangular array on the crossbeam on the pay-off frame, and a wire drum is arranged on the top of each vertical row of reel shafts, and the horizontal distance between the reel shafts and the wire drum in each vertical row gradually decreases from top to bottom.

6. The forming equipment for low-temperature fuel dispenser pipe according to claim 5, characterized in that: The wire arrangement and winding assembly includes a wire arrangement and winding frame, and a wire arrangement structure, a winding structure and a driving structure are installed on the wire arrangement and winding frame; the wire arrangement structure is connected to the wire release assembly, and the wire arrangement structure includes an optical axis and a wire guide wheel rotatably connected to the wire arrangement and winding frame, and the optical axis wire arrangement device and the wire guide wheel form a wire arrangement gap for multiple strands of metal wire to pass through; the winding structure includes a large I-shaped wheel shaft, and a large I-shaped wheel for winding multiple strands of metal wire is provided on the large I-shaped wheel shaft; the driving structure has an output shaft, and the output shaft is transmission-connected to the large I-shaped wheel shaft, and the output shaft is transmission-connected to the optical axis through a chain sprocket.

7. The forming equipment for low-temperature fuel dispenser pipe according to claim 5, characterized in that: The forming device comprises a forming frame and a winding frame, wherein the forming frame is used to fix the stranding assembly and the pressing assembly, the stranding assembly and the pressing assembly are respectively arranged at two opposite ends of the forming frame, and the winding frame is used to fix the winding assembly; The stranding assembly includes a stranding drive, a rotating frame and a second stranding steel wheel; the second stranding steel wheel is fixed to the forming machine frame through a second stranding frame, and a second gathering channel for the metal rope to pass through is formed in the second stranding steel wheel; The strand driving member has an output shaft; the rotating frame is fixed to the strand driving member output shaft, a mounting shaft is fixed on the rotating frame, the mounting shaft is arranged along the radial direction of the output shaft, and a plurality of groups of large I-shaped wheels wound with multiple strands of metal wire are sleeved on the mounting shaft.

8. The forming equipment for low-temperature fuel dispenser pipe according to claim 5, characterized in that: The profiling assembly includes a profiling drive, a first pressing wheel and a second pressing wheel; the first pressing wheel and the second pressing wheel are both rotatably connected to the forming frame, a forming bottom mold is provided on the surface of the first pressing wheel, and a forming top mold is formed on the surface of the second pressing wheel, and when the forming bottom mold is engaged with the forming top mold, a forming mold cavity is formed between the forming bottom mold and the forming top mold; the profiling drive is fixed to the forming frame through a motor frame, and the profiling drive has an output shaft, and the output shaft of the profiling drive is respectively connected to the first pressing wheel and the second pressing wheel through a transmission assembly.

9. The forming equipment for low-temperature fuel dispenser pipe according to claim 5, characterized in that: The winding assembly includes a winding drive, a winding guide wheel and a winding wheel; the winding guide wheel is rotatably connected to the winding frame, and the winding guide wheel is docked with the profiling assembly; the winding wheel is rotatably connected to the winding frame, the winding drive has an output shaft, and the winding drive output shaft is rotatably connected to the winding wheel; the winding drive provides power to wind the formed metal rope output by the profiling assembly onto the winding wheel.

10. A method for manufacturing a cryogenic fuel dispenser pipe, characterized in that: The following steps are involved: Providing a forming device for a low-temperature fuel dispenser pipe as described in any one of claims 4 to 9; Preparation step of S1 conductor: providing 20-30 rolls of stainless steel wire coils with an outer diameter of 0.1 mm, fixing the stainless steel wire coils on the wire wheels respectively; guiding the stainless steel wires through the circumference of the corresponding wire drum, passing through the first gathering channel, the wire arrangement gap and connecting with the large working wheel in sequence; Open the driving structure; provide power through the driving structure to drive the optical axis and the large I-shaped wheel shaft to rotate, so that the multiple strands of metal wire pass through the wire arrangement gap and are wound on the large I-shaped wheel; cut the wire and take out the large I-shaped wheel wound with multiple strands of metal wire; install a new large I-shaped wheel, repeat the above steps, and output two groups of large I-shaped wheels wound with multiple strands of metal wire; A plurality of large I-shaped wheels wound with multiple strands of metal wire are respectively sleeved on the mounting shafts on the rotating frame; the multiple strands of metal wire are guided to sequentially pass through the second gathering channel and the forming cavity, and then connected to the winding wheel after passing through the peripheral surface of the winding guide wheel; The stranding drive, the profiling drive, and the winding drive are turned on; the stranding drive provides power to drive the rotating frame to rotate, and drives the large I-shaped wheels on the mounting shaft to rotate, so that the multiple strands of metal wires wound around the surface of the large I-shaped wheels are twisted into metal ropes; the profiling drive drives the first pressing wheel and the second pressing wheel to rotate, so that the forming bottom mold on the surface of the first pressing wheel engages with the forming top mold 431 on the surface of the second pressing wheel, and the metal rope in the forming mold cavity is extruded and formed; the winding drive provides power to wind the formed metal rope output by the profiling component onto the winding wheel; The formed metal rope on the winding wheel is cut into a preset length to obtain a conductor; S2 inner rubber layer preparation step: providing inner rubber layer raw materials, heating and extruding the inner rubber layer raw materials through an extruder to plasticize the inner rubber layer raw materials, and then extruding and molding through a mold to obtain the inner rubber layer; S3: a step of preparing the support layer: providing a plurality of fiber strands, and winding the fiber strands on the outer surface of the inner rubber layer by a braiding machine to obtain a first support layer; Adhere the wire to the surface of the first supporting layer along the axis direction of the first supporting layer, and the two ends of the wire extend from the two ends of the first supporting layer respectively; Providing a plurality of fiber strands, and winding the fiber strands on the outer surface of the first supporting layer and the conductive wire by a braiding machine to obtain a second supporting layer; S4 outer rubber layer preparation steps: providing outer rubber layer raw materials, heating and extruding the outer rubber layer raw materials through an extruder to plasticize the inner rubber layer raw materials, and then extruding through a mold, and coating the extruded rubber on the outer surface of the second supporting layer to form a uniform outer rubber layer.

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