JP2007016809A - Flexible oil-proof hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible oil-proof hose formed by winding a signal wire such as an electric cable on a hose, transmitting a signal, and reducing abrasion, damage or the like of the signal wire. <P>SOLUTION: A liquid injection hose 11 is composed of the multilayer hose 12 composed of a long cylindrical body, the electric cable 20 as the signal wire, a protective tape 21, a metallic outer wire 22 or the like. The electric cable 20 is wound on an outer peripheral side of an envelope 19 of the hose 12 with a comparatively large spiral pitch, and the electric cable 20 is adhered and fixed to the hose 12 by the protective tape 21. The metallic outer wire 22 is wound on the protective tape 21 at an outer peripheral side of the hose 12 with a small spiral pitch. The spiral direction of the electric cable 20 is opposite to the spiral direction of the outer wire 22, thus a problem on disordering or the like caused by loosening of the electric cable 20 can be prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a flexible oil-resistant liquid hose that is preferably used when supplying and discharging oil liquid such as gasoline from a tank truck, and in particular, a flexible oil-resistant liquid having a configuration in which a signal line such as an electric cable is attached. Regarding hose.

  In general, in a gas station that supplies oil such as gasoline to a vehicle, an underground tank is buried as an oil storage tank in the basement of the gas station, and oil, such as gasoline, light oil, and kerosene are placed in the underground tank. Is stored for each liquid type. In addition, a liquid injection pipe is provided in the underground tank, and when the remaining amount of the oil liquid stored in the underground tank decreases, the liquid oil is replenished into the underground tank via a liquid injection pipe from a tank truck or the like. ) Unloading and unloading work is performed.

  In this case, a joint serving as an injection port is provided at the upper end side of the liquid injection pipe provided in the filling station, and a liquid injection hose made of, for example, a rubber hose is detachable between the joint and the tank truck. Connected to. During the loading and unloading operation of the oil liquid, by opening the liquid discharge valve mounted on the tank truck, oil liquid such as gasoline is injected from the tank truck into the underground tank through the liquid injection hose and liquid pipe. It is what is done.

  In addition, an oil mixture prevention device is installed between the underground tank of the gas station and the tank truck to check the liquid type (type of oil liquid) during loading and unloading of the oil liquid and prevent the occurrence of mixed oil. It has been. That is, detectors for identifying the liquid type are provided at both ends of the liquid injection hose made of a rubber hose, etc., and an electric cable for transmitting a liquid type signal (electric signal) between these detectors. The signal line is provided along the outer peripheral surface of the liquid injection hose (see, for example, Patent Document 1).

  On the other hand, as an injection hose used for the above-described oil liquid loading / unloading operation, for example, a synthetic resin film made of polypropylene (PP), nylon, polyester, or the like is wound in multiple layers, and reinforcing wires are provided inside and outside thereof. A resin hose configured to be wound is also known (for example, see Patent Document 2).

Japanese Patent Laid-Open No. 9-40097 Japanese Utility Model Publication No. 2-29383

  By the way, in the prior art by patent document 1 mentioned above, the electric cable (signal wire | line) used for an oil-mixing prevention apparatus is only attached along the outer peripheral surface of the injection hose which consists of rubber hoses etc., for example, and an electric cable is Looseness on the outer peripheral side of the injection hose has caused problems such as Barakels.

  That is, a metal outer wire or the like is generally spirally wound around the outer peripheral surface of the liquid injection hose as described above, and the liquid injection hose is protected from the outside by the outer wire. The electric cable is merely provided on the outside of the outer wire, for example, by being fastened with a fastening band or the like, or wound spirally.

  For this reason, when carrying the liquid filling hose in conjunction with the loading and unloading of liquid oil, the electrical cable is in direct contact with the ground etc. on the outside of the liquid filling hose and is easily worn and damaged. The electric cable wound around the liquid hose is gradually relaxed on the outer peripheral side of the liquid injection hose and becomes like a bark, and in the worst case, there is a problem that the middle part thereof is disconnected.

  On the other hand, the liquid injection hose used for the oil liquid loading / unloading operation as described above, for example, when formed by a rubber hose, has a drawback that it is difficult to ensure sufficient flexibility, leading to a decrease in workability. Further, in the case of a rubber hose, the deterioration state due to long-term use cannot be determined only by visual inspection from the outside, and there is a possibility that an oil liquid may be ejected if a crack occurs.

  For this reason, in the prior art according to Patent Document 2, the injection hose is wound with a synthetic resin film made of, for example, polypropylene (PP), nylon, polyester, or the like, and a reinforcing wire is wound inside and outside thereof. The resin hose is provided. And when this resin hose is used as an injection hose for a tank truck, there is an advantage that sufficient flexibility can be secured.

  However, since the resin hose according to the prior art is too soft and greatly bends and deforms (elastically deforms), the joints (metal fittings) at both ends of the hose are easy to hit the operator's knees, shins, etc. There is a problem that attention is required and the burden on the worker increases.

  In addition, the inner reinforcing wire used for the resin hose is exposed on the inner surface of the hose to form an uneven surface, so that it generates frictional resistance etc. in the oil flowing through the hose, causing foaming, There is a problem that it takes a long time for loading and unloading the oily liquid, which causes the cutting to become worse.

  Moreover, since the synthetic resin material used for the resin hose is an insulator, countermeasures against static electricity are not always sufficient. In this case, the reinforcing wire wound outside is a conductor, but its electrical conductivity is limited to the inside of the wire, and there is a problem that static electricity removal of the entire resin hose is insufficient.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to transmit signals using a signal line such as an electric cable and to prevent wear and damage of the signal line. An object of the present invention is to provide a flexible oil-resistant liquid hose that can be suppressed and can improve durability, life, and reliability.

  Another object of the present invention is to provide a flexible oil-resistant liquid hose that can reduce the frictional resistance and the like of the inner surface of the hose and can improve the liquid drainage by suppressing the occurrence of foaming and the like. is there.

  Another object of the present invention is to provide appropriate flexibility as, for example, a liquid injection hose, to improve workability when carrying the hose, and to efficiently load and unload oil. An object of the present invention is to provide a flexible oil-resistant liquid hose that can be made.

  In order to solve the above-described problems, the present invention provides a hose body formed as a long cylindrical body composed of a number of layers using a flexible material having corrosion resistance to oil, and the hose body. In order to protect from the outside, it is applied to a flexible oil-resistant liquid hose comprising a metal outer wire that is wound around the outer periphery of the hose body in a spiral shape.

  A feature of the configuration adopted by the invention of claim 1 is that a signal line spirally wound at a pitch different from that of the outer wire is fixed to the hose body at a position inside the outer wire. The configuration is to be provided.

  According to a second aspect of the present invention, the signal wire is spirally wound and provided on the outer peripheral surface of the hose body inside the outer wire, and the signal wire is provided on the hose body with respect to the hose body. An oil-resistant protective tape is spirally wound from above the signal line so as to be fixed.

  On the other hand, the invention according to claim 3 is characterized in that the hose body is a cylindrical rubber layer formed by using a rubber material which is located on the innermost side among the plurality of layers and contains carbon, and an outer side of the rubber layer. An intermediate reinforcing layer provided on the outer side, a resin layer formed by winding a resin tape made of a synthetic resin material on the outer side of the reinforcing layer, and a protection provided by winding the outer side of the resin layer It is configured by a resin sheath that is a layer, and the signal line is provided between the outer wire and the sheath.

  According to a fourth aspect of the present invention, the hose body includes a cylindrical rubber layer formed by using a rubber material located on the innermost side of the plurality of layers and containing carbon, and an outer side of the rubber layer. An intermediate reinforcing layer provided on the outer side, a resin layer formed by winding a resin tape made of a synthetic resin material on the outer side of the reinforcing layer, and a protection provided by winding the outer side of the resin layer The signal line is formed between the resin layer and the outer cover.

  The intermediate reinforcing layer is spirally wound around a first reinforcing rubber layer provided outside the rubber layer and having a reinforcing cord embedded in a rubber material, and outside the first reinforcing rubber layer. And a second reinforcing rubber layer in which a reinforcing cord is embedded in a rubber material provided outside the first reinforcing rubber layer so as to cover the wire from the outside. It is good.

  Moreover, the manufacturing method of such a flexible oil-resistant liquid hose includes a rubber layer forming step of forming an inner rubber layer into a cylindrical shape using a first mandrel, and the rubber layer using the first mandrel. A reinforcing layer forming step for forming an intermediate reinforcing layer into a cylindrical shape outside the first mandrel, and after removing the first mandrel from the inner peripheral side of the rubber layer, the second mandrel having a smaller diameter than the first mandrel A rope winding step of spirally winding a heat-resistant rope around the reinforcing layer with the mandrel inserted on the inner peripheral side of the rubber layer, and reinforcing the rubber layer with the rope wound A vulcanization step of forming a spiral concavo-convex portion in the rubber layer and the reinforcing layer on the outer peripheral side of the second mandrel by vulcanizing the layer, and the second mandrel from the inner peripheral side of the rubber layer After the extraction, the third mandrel having a smaller diameter than the second mandrel A multi-layer winding step of forming a resin layer by winding a resin tape made of a synthetic resin material on the outer side of the reinforcing layer in a state where the reel is inserted on the inner peripheral side of the rubber layer; and an outer cover on the outer side of the resin layer A signal wire winding step in which a signal wire is spirally wound together with a protective tape from above, and a metal outer wire is spirally wound from above the protective tape to the outside of the jacket And a step of removing the third mandrel from the inner peripheral side of the rubber layer.

  As described above, according to the first aspect of the present invention, the signal line for transmitting an electrical signal between the one side in the length direction of the hose body and the other side is arranged at a position inside the outer wire. Since it is configured to be fixed to the body, for example, when carrying a flexible oil-resistant liquid hose (injection hose) in connection with oil liquid loading and unloading work, the signal line is directly connected to the ground etc. outside the hose. The contact can be prevented by the outer wire, the signal line can be protected from the outside, and the signal line can be relaxed on the outer peripheral side of the hose, thereby preventing problems such as barracels. In addition, since the signal line is wound around the hose body at a pitch different from that of the outer wire, when the oil-resistant liquid hose is bent so as to be largely bent, for example, the spiral of the outer wire Even when it is bent and deformed so as to change its shape, it is possible to suppress the spiral shape of the signal line from being affected by this, and it is possible to keep the signal line in a stable winding state with respect to the hose body.

  Therefore, between the one side in the length direction of the flexible oil-resistant liquid hose and the other side, it is possible to stably transmit an electric signal using a signal line such as an electric cable, and the signal line is worn or damaged. Etc. can be prevented over a long period of time, and the durability, life and reliability of the hose and signal line can be improved.

  According to the invention described in claim 2, since the signal line is fixed to the outer peripheral surface of the hose body using an oil-resistant protective tape, the signal line is spirally wound around the outer peripheral surface of the hose body. When rotating, the signal line can be fixed to the outer peripheral side of the hose body at a predetermined spiral pitch by winding the protective tape spirally over the signal line. And on the outer peripheral side of the hose body, a metal outer wire is spirally wound on the signal line (outside) to provide sufficient strength against external impacts and the like. For example, the durability and life of the oil-resistant liquid hose used for oil liquid loading and unloading operations can be increased.

  On the other hand, according to the invention described in claim 3, the innermost layer of the hose body composed of a plurality of laminated layers is constituted by a cylindrical rubber layer formed by using a rubber material containing carbon. The outer layer is composed of a resin layer formed by winding a plurality of resin tapes made of a synthetic resin material, so that electric conductivity can be ensured by an inner rubber layer containing carbon. Removal and the like can be easily performed. Further, the inner surface of the rubber layer can be formed to have a substantially uniform smooth surface, the flow resistance (friction resistance) of the oil liquid can be reduced, and the occurrence of foaming can be suppressed to improve the liquid breakability. . Also, a resin layer is provided outside the rubber layer through an intermediate reinforcing layer, and this resin layer is formed by winding a resin tape made of a synthetic resin material in multiple layers. Thus, even if a crack occurs in the rubber layer, it can be closed by the outer resin layer, and oil leakage, ejection, etc. can be reliably prevented.

  In addition, a resin outer sheath serving as a protective layer is wound around the outer side of the resin layer, a signal wire is spirally wound around the outer surface of the outer sheath, and a metal outer wire is placed on the outer sheath. Since it is configured to be wound in a spiral shape, by using the jacket and the outer wire, it is possible to give the hose body and the signal line sufficient strength (durability) against an external impact or the like. Reliability, durability, and life as an oil resistant liquid hose used for oil liquid loading and unloading operations can be increased. And, for example, as an oil-resistant liquid hose used for oil liquid loading and unloading work, etc., it is possible to ensure appropriate flexibility by the resin layer, improve workability when carrying the hose, and to load and unload oil liquid Can be done efficiently.

  In the invention according to claim 4, since the signal line is wound and provided between the resin layer and the jacket of the hose body, the signal line is spirally wound around the outer peripheral side of the resin layer. After turning, by providing a jacket from above, the signal line can be protected from the outside by this jacket, and by wrapping a metal outer wire from above, this outer wire can also be used. The signal line can be protected from the outside.

  The hose body includes an intermediate reinforcing layer provided between the inner rubber layer and the outer resin layer, first and second reinforcing rubber layers in which a reinforcing cord is embedded in a rubber material, If constituted by a metal wire spirally wound between the reinforcing rubber layers, the first and second reinforcing rubber layers and the metal are formed between the inner rubber layer and the outer resin layer. It is possible to reinforce the entire hose and to improve the durability and life of the hose.

  Hereinafter, a case where a flexible oil-resistant liquid hose according to an embodiment of the present invention is used as an injection hose for a tank truck will be described in detail with reference to the accompanying drawings.

  Here, FIG. 1 to FIG. 17 show a first embodiment of the present invention. In the figure, 1 is a site of a gas station, 2 is a tank chamber provided in the basement of the site 1, and 3 is an underground tank as an oil storage tank installed in the tank chamber 2. In the underground tank 3, volatile oil liquid 4 such as regular gasoline, high-octane gasoline, light oil or kerosene is stored. The oil liquid 4 is not limited to oil liquids such as gasoline, light oil, or kerosene, but includes various petroleum products, organic chemical liquids, liquid chemicals, and the like.

  5 is a suction pipe whose lower end is connected to the underground tank 3, and 6 is a weighing machine provided on the site 1, and the upper end side of the suction pipe 5 is connected to the weighing machine 6. The weighing machine 6 drives a built-in pump (not shown), for example, when supplying oil liquid 4 such as gasoline to a customer's vehicle, thereby sucking up the oil liquid 4 in the underground tank 3. 5 is sucked up.

  Reference numeral 7 denotes a liquid injection pipe whose lower end is connected to the underground tank 3. The liquid injection pipe 7 is provided with a joint 8 as a liquid injection port on the upper end side protruding upward from the site 1 of the filling station. A liquid injection hose 11 is detachably connected to the joint 8 with a tank truck 9 described later.

  Reference numeral 9 denotes a tank truck for transporting the oil liquid 4 and the like on the site 1 of the filling station. The tank truck 9 is equipped with a tank 10 for storing the oil liquid 4 and the like, and is disposed on the lower end side of the tank 10. Are provided with a supply / discharge valve, a supply / discharge port (not shown) and the like for supplying and discharging the oil liquid 4 and the like. And one end side of the injection hose 11 mentioned later is connected to the supply / discharge port of the tank truck 9, and the other end side of the injection hose 11 is detachably connected to the joint 8 of the injection pipe 7. is there.

  Reference numeral 11 denotes a liquid injection hose as a flexible oil-resistant liquid hose employed in the present embodiment, and the liquid injection hose 11 is composed of a hose body 12 and an outer wire 22 described later shown in FIG. . And the liquid injection hose 11 has the full length of about 3-5 m (meter), for example, The hose size (inner diameter) is about 70-110 mm. Moreover, the injection hose 11 has sufficient durability even for an internal pressure of about 0.5 MPa (megapascal), for example.

  Reference numeral 12 denotes a hose body that constitutes a main part of the liquid injection hose 11, and the hose body 12 includes a plurality of layers laminated as shown in FIGS. 2 to 4, and is flexible, oil resistant, and chemical resistant. It is formed as a long cylindrical body having the like. The hose body 12 is composed of a rubber layer 13, rubberized cord layers 15 and 17, a wire 16, a resin layer 18, a jacket 19 and the like, which will be described later. Yes.

  13 is a cylindrical rubber layer constituting the innermost layer of the hose body 12, and this rubber layer 13 is made of a rubber material such as nitrile rubber (NBR) containing carbon, for example, FIG. 4, for example, having a thickness of about 1.5 to 2.0 mm, preferably about 1.8 mm. And the rubber layer 13 comprises the innermost layer of the hose body 12, and an oil liquid distribute | circulates along the inner surface 13A.

  14 is an intermediate reinforcing layer comprising a plurality of layers provided outside the rubber layer 13, and the intermediate reinforcing layer 14 includes a rubberized cord layer 15, a metal wire 16 and other rubberized cord layers described later. 17. The reinforcing layer 14 is provided between the rubber layer 13 and a resin layer 18 described later.

  A rubberized cord layer 15 is a first reinforcing rubber layer wound around the outer side (outer peripheral surface) of the rubber layer 13, and the rubberized cord layer 15 is a rubber made of, for example, nitrile rubber (NBR) or the like. It is formed by embedding a nylon reinforcing cord 15A in the material, and its thickness is, for example, about 0.3 to 0.8 mm, preferably about 0.5 mm.

  Reference numeral 16 denotes a metal wire spirally wound around the rubberized cord layer 15, and the wire 16 is formed using an elastic metal material such as a steel wire (SWB), for example. The (outer diameter of the wire) is 1.4 to 1.8 mm, preferably about 1.6 mm. The wire 16 extends spirally between the rubberized cord layer 15 and a rubberized cord layer 17 described later at a pitch of about 15 to 18 mm, for example.

  Reference numeral 17 denotes a rubberized cord layer serving as a second reinforcing rubber layer that is wound around the outer peripheral surface of the rubberized cord layer 15 so as to cover the wire 16 from the outside. The rubberized cord layer 17 is also made of, for example, nitrile rubber. It is formed by embedding a nylon reinforcing cord 17A in a rubber material made of (NBR) or the like, and its thickness is, for example, about 0.3 to 0.8 mm, preferably about 0.5 mm.

  The rubberized cord layer 17 covers the wire 16 wound around the outer peripheral surface of the rubberized cord layer 15 from the outside. Further, the rubberized cord layers 15 and 17 constitute an intermediate reinforcing layer 14 provided with a wire 16 by being laminated between an inner rubber layer 13 and a resin layer 18 described later.

  Reference numeral 18 denotes a resin layer provided on the outer side (outer peripheral surface) of the rubberized cord layer 17. The resin layer 18 is a resin tape (PP film or the like) made of a synthetic resin material such as polypropylene (PP), for example. Is wound around the outer peripheral surface of the rubberized cord layer 17 and has a thickness of about 0.3 mm.

  That is, the PP film as the material of the resin layer 18 has a film thickness of, for example, about 30 μm, and the film width is about 300 mm. And, such PP film is spirally wound around the outer peripheral surface of the rubberized cord layer 17 with an overlap margin (overlap margin) of, for example, about 10 mm (for example, 8 to 20 layers, preferably about 10 layers). The resin layer 18 is formed.

  Reference numeral 19 denotes an outer cover wound around the outer side of the resin layer 18. The outer cover 19 is formed of a synthetic resin film such as vinyl chloride, and has a thickness of about 50 μm. The outer jacket 19 covers the resin layer 18 from the outside to enhance wear resistance, chemical resistance, and the like.

  Reference numeral 20 denotes an electric cable as a signal line wound around the hose body 12, and the electric cable 20 includes, for example, three lead wires (hereinafter, covered wires 20a, 20b, 20c) are joined to each other in the lateral direction using the resin coating. In addition, as the electric cable 20, it is not always necessary to use the three covered wires 20a to 20c. For example, the electric cable 20 may be configured by using two covered wires or one covered wire.

  Here, the electric cable 20 is spirally wound along the outer peripheral surface of the jacket 19 as shown in FIG. 3, and the helical pitch is set to a large pitch of about 200 mm, for example. In addition, the winding direction (spiral direction) of the electric cable 20 is opposite to that of the outer wire 22 described later, and the helical pitch is increased to about 6 to 14 times.

  Further, as shown in FIG. 2, both end sides of the electric cable 20 are drawn outward from the protective tape 21 at positions of crimping sleeves 24 and 26, which will be described later, and these lead portions 20A, 20B are provided with liquid type sensors 27, which will be described later. 28. The electric cable 20 transmits an electric signal (liquid type signal) between the liquid type sensors 27 and 28.

  21 is a protective tape for adhering the electric cable 20 to the outer peripheral surface of the hose body 12, and the protective tape 21 is made of, for example, a synthetic resin tape such as vinyl chloride in the same manner as the outer cover 19, and has an adhesive force, for example. It is formed as an adhesive tape. Further, the tape width of the protective tape 21 is about 60 mm, for example, and has a width that is sufficiently wider than that of the electric cable 20.

  The protective tape 21 is wound around the outer surface of the jacket 19 at a spiral pitch similar to that of the electric cable 20 (for example, a pitch of about 200 mm) to fix (stick) the electric cable 20 to the hose body 12. The electric cable 20 is protected from the outside with the outer jacket 19. Further, the protective tape 21 has a function of increasing the product value, advertising effect, etc. of the hose 11 by printing the product name of the liquid injection hose 11 on the surface (outer surface) thereof.

  Reference numeral 22 denotes a metal outer wire spirally wound around the hose body 12, and the outer wire 22 is formed by using an elastic metal material such as aluminum, for example, and its wire diameter (the outer diameter of the wire). Is 3.5 to 4.5 mm, preferably about 4.0 mm. Then, as shown in FIG. 3, the outer wire 22 has an electric cable 20 and a protective tape 21 attached to the outer peripheral surface of the jacket 19, and then a constant helical pitch (for example, along the outer periphery of the jacket 19 from above. It is wound at a pitch of about 15 to 18 mm.

  In this case, the winding direction (spiral direction) of the outer wire 22 is opposite to that of the electric cable 20 and the protective tape 21 as shown in FIGS. 2 and 3, and the helical pitch is set to be small. The outer wire 22 extends on the outer peripheral side of the hose body 12 with a relatively small helical pitch, thereby protecting the hose body 12 and the electric cable 20 of the liquid injection hose 11 against external obstacles, impact loads, and the like. To do.

  23 is a joint portion on one side provided on one side in the length direction of the liquid injection hose 11, and the joint portion 23 is configured as a female joint portion including a quick coupling or the like as shown in FIG. The joint portion 23 is provided with a pair of cam levers 23A and 23A, for example. Further, as shown in FIG. 3, the joint portion 23 is provided with a cylindrical hose fitting portion 23B, and one end of the liquid injection hose 11 is fitted to the outer periphery of the hose fitting portion 23B. Is done.

  Reference numeral 24 denotes a crimp sleeve as a fixing member for fixing the joint portion 23 to one end of the liquid injection hose 11, and the crimp sleeve 24 is formed as a metal cylinder as shown in FIG. The crimping sleeve 24 is inserted into one outer periphery of the liquid injection hose 11, and the liquid injection hose 11 is caulked and fixed to the hose fitting part 23 </ b> B of the joint part 23 in a tightened state from the outside.

  The crimp sleeve 24 is provided with a cable insertion hole 24A in the radial direction, and the lead-out portion 20A of the electric cable 20 is inserted into the cable insertion hole 24A. The cable insertion hole 24A of the crimping sleeve 24 is subjected to an appropriate waterproofing treatment or the like as necessary with the drawing portion 20A of the electric cable 20 inserted.

  25 is a joint portion on the other side provided on the other side in the length direction of the liquid injection hose 11, and the joint portion 25 is configured as a male joint portion made of a quick coupling or the like as shown in FIG. Yes. The male joint portion 25 is attached to the other end portion of the liquid injection hose 11 in a tightened state using another crimp sleeve 26. The male joint portion 25 is formed with an annular cam groove 25A.

  In this case, the joint 8 on the liquid injection pipe 7 side and the supply / discharge port (joint) on the tank truck 9 side are also provided with the same components as the cam lever 23A and the cam groove 25A described above. The joint portions 23 and 25 of the liquid injection hose 11 are detachably connected to the counterpart joint 8 (or the joint on the tank truck 9 side) by the cam lever 23A and the cam groove 25A, for example, with one touch. is there.

  The crimping sleeve 26 on the joint portion 25 side is configured in the same manner as the crimping sleeve 24 on the joint portion 23 side, and a cable insertion hole 26A is formed in the radial direction. Then, as shown in FIG. 2, the cable insertion hole 26A is inserted with a lead-out portion 20B of the electric cable 20, and in this state, appropriate waterproofing processing is performed as necessary.

  27 and 28 are liquid type sensors constituting a detector for identifying the liquid type, and one liquid type sensor 27 of the liquid type sensors 27 and 28 is disposed on one side of the liquid injection hose 11 and is crimped. It is fixed to the outer peripheral side of the sleeve 24 using a fastener 29 or the like. The other liquid type sensor 28 is disposed on the other side of the liquid injection hose 11 and is fixed to the outer peripheral side of the pressure-bonding sleeve 26 using a similar fastener 29 or the like.

  The liquid type sensors 27 and 28 are provided with insertion portions 27A and 28A such as an identification key (not shown), respectively. In these insertion portions 27A and 28A, for example, loading and unloading of oil liquid is performed. Prior to the above, the identification key is inserted. That is, these identification keys store magnetic information corresponding to liquid types such as regular gasoline, high-octane gasoline, light oil, or kerosene.

  The liquid type sensors 27 and 28 read magnetic information as a liquid type signal from the identification key inserted into the insertion portions 27 </ b> A and 28 </ b> A, and this liquid type signal (electrical signal) is read through the electric cable 20. , 28 to transmit information. As a result, when the liquid type signals between the liquid type sensors 27 and 28 coincide with each other, the oil liquid unloading operation is permitted, and when the liquid type signals do not coincide with each other, the unloading operation is prohibited (stopped).

  The liquid injection hose 11 used in the tank truck 9 according to the present embodiment has the above-described configuration. Next, the liquid injection operation will be described.

  First, when unloading the oil liquid 4 from the tank 10 of the tank truck 9 in the underground tank 3 of the filling station, one joint portion 23 of the liquid injection hose 11 is connected to, for example, a joint serving as a liquid supply / discharge port on the tank truck 9 side. (Not shown), and the other joint portion 25 is connected to the joint 8 on the liquid injection pipe 7 (underground tank 3) side.

  Then, on the tank truck 9 side, the operator inserts an identification key corresponding to the oil liquid 4 (for example, regular gasoline) to be loaded into the insertion portion 27A of the liquid type sensor 27. Thus, the liquid type sensor 27 transmits the liquid type signal (electric signal) to the counterpart liquid type sensor 28 through the electric cable 20 while reading the liquid type signal from the identification key.

  Further, on the joint 8 side of the gas station, when the operator inserts an identification key corresponding to the oil liquid 4 in the underground tank 3 into the insertion portion 28A of the liquid type sensor 28, the liquid type sensor 28 detects the liquid type from the identification key. While reading the signal, the liquid type signal is transmitted to the counterpart liquid type sensor 27 through the electric cable 20. Then, control devices (both not shown) provided on the tank truck 9 side and the gas station side respectively determine whether or not the liquid type signals of the two coincide.

  Next, in this state, when it is determined that the two liquid type signals coincide with each other, the supply / discharge valve (not shown) on the tank truck 9 side is opened and the liquid injection valve (not shown) is also shown on the joint 8 side. Open). As a result, the oil solution 4 is injected (supplemented) from the tank 10 into the underground tank 3 via the injection tube 7, and the loading operation of the oil solution 4 is executed.

  On the other hand, when the liquid type signals do not match between the liquid type sensors 27 and 28, the supply / discharge valve on the tank lorry wheel 9 side is kept open without closing, and the liquid injection valve is also closed on the joint 8 side. Hold the valve state. Thereby, the loading and unloading operation of the oil liquid can be prohibited (stopped), and it is possible to prevent the oil liquids of different liquid types from being unloaded in the underground tank 3 and generating mixed oil.

  For this reason, the oil liquid loading / unloading operator selects an oil liquid that matches the oil liquid 4 in the underground tank 3 from the tank 10 (a plurality of types of oil liquids are individually stored) of the tank truck 9. The loading / unloading operation as described above is repeated again. Only when the two liquid types match, the supply / discharge valve on the tank truck 9 side is opened, and the liquid injection valve is also opened on the joint 8 side.

  In this way, when the replenishment (unloading) of the oil liquid 4 is completed, the valves are closed on the tank truck 9 side and the joint 8 side, respectively, and the identification keys are inserted into the insertion portions 27A of the liquid type sensors 27 and 28, After taking out each from 28A, the liquid injection hose 11 is removed manually from between the tank truck 9 and the joint 8.

  Next, the manufacturing method of the liquid injection hose 11 used for such an oil liquid loading / unloading operation will be described with reference to FIGS.

  First, in the step of forming the inner rubber layer 13, the cylindrical rubber layer 13 is formed as shown in FIG. 7 using the first mandrel 30 having an outer diameter of, for example, about 80 mm (rubber layer forming step). ). In this case, the rubber layer 13 is formed as a long cylindrical body having a total length of about 3 to 5 m (meters).

  Next, on the outer peripheral side of the rubber layer 13, rubberized cord layers 15 and 17 serving as intermediate reinforcing layers are formed by winding as shown in FIG. 8, and between these rubberized cord layers 15 and 17, The intermediate wire 16 is provided by being spirally wound with a certain pitch in a tensioned state.

  The rubber layer 13, the rubberized cord layer 15, the wire 16, and the rubberized cord layer 17 thus wound around the outer periphery of the first mandrel 30 are vulcanized using a vulcanizer (not shown). Then, the rubber layer 13, the rubberized cord layer 15, the wire 16 and the rubberized cord layer 17 are formed as an inner cylindrical body 31 as shown in FIG. 8 (reinforcing layer forming step). The inner cylindrical body 31 in this case has a full length L (for example, about 3.3 m) as shown in FIG.

  Next, after the first mandrel 30 is removed from the inner peripheral side of the inner cylindrical body 31 as shown in FIG. 9, the second mandrel 32 is moved to the inner peripheral side of the inner cylindrical body 31 as shown in FIG. Insert with a gap. In this case, the second mandrel 32 has an outer diameter of about 76 mm, for example, and is formed to have a smaller diameter than the first mandrel 30 shown in FIG.

  In this state, while applying a tension to the heat-resistant rope 33 (for example, hemp rope) from the outside of the inner cylindrical body 31, a constant pitch (for example, a pitch of about 15 to 18 mm) as shown in FIG. The inner cylindrical body 31 is reduced in diameter (deformed) by the rope 33 so as to press the rubber layer 13 against the outer peripheral surface of the second mandrel 32 (rope winding step).

  Next, in the state of FIG. 11 with the rope 33 wound, the inner cylindrical body 31 is re-vulcanized (secondary vulcanization) by a vulcanizer (not shown), and the outer periphery of the second mandrel 32 On the side, a spiral concavo-convex portion 34 is formed on the inner cylindrical body 31 (rubber layer 13, rubberized cord layers 15 and 17) as shown in FIG. 12 (vulcanization step).

  After the inner cylindrical body 31 is vulcanized on the outer peripheral side of the second mandrel 32, the rope 33 is removed from the outer side of the inner cylindrical body 31. At this stage, the inner cylindrical body 31 is formed into a bellows shape as a whole by the spiral concavo-convex portion 34, and its total length L1 is as short as about 3.0 m (L1 <L) as shown in FIG. is there.

  Next, after the second mandrel 32 is removed from the inner peripheral side of the inner cylindrical body 31 as shown in FIG. 12, the third mandrel 35 is moved to the inner peripheral side of the inner cylindrical body 31 as shown in FIG. Insert with a gap. In this case, the third mandrel 35 has an outer diameter of about 72 mm, for example, and is formed to have a smaller diameter than the second mandrel 32 shown in FIG.

  In this state, a resin tape (for example, PP film) is wound in multiple layers from the outside of the inner cylindrical body 31, and the resin layer 18 is formed on the outer periphery of the rubberized cord layer 17 as shown in FIG. 14 (multilayer winding step). . Thereby, the inner cylindrical body 31 (rubber layer 13, rubberized cord layers 15, 17) is reduced in diameter (deformed) so that the inner periphery of the rubber layer 13 is pressed against the outer peripheral surface of the third mandrel 35. .

  Next, in this state, a jacket 19 is provided outside the resin layer 18 to form a hose body 12 made of a long cylindrical body as shown in FIG. Then, the hose body 12 is provided with the electric cable 20 spirally wound from the outer cover 19 as shown in FIG. 15 (signal line winding step). In this winding step, the electric cable 20 is wound along the outer peripheral surface of the jacket 19 with a large helical pitch of, for example, about 200 mm.

  Further, in this winding step, as shown in FIG. 16, the protective tape 21 is wound around the hose body 12 from above the electric cable 20 along the outer peripheral surface of the jacket 19 at the same spiral pitch. The electric cable 20 is fixed so as to be adhered to the outer periphery of the outer jacket 19 with the adhesive force. Then, the winding direction (spiral direction) of the electric cable 20 and the protective tape 21 is opposite to the spiral direction of the resin layer 18, the jacket 19 and the outer wire 22, and the helical pitch is compared with the outer wire 22 and the like. And make it big enough.

  Next, in this state, on the outer peripheral side of the hose body 12, the metal outer wire 22 is tensioned from above the protective tape 21 with a certain pitch (for example, a small pitch of about 15 to 18 mm). As shown in FIG. And after that, the 3rd mandrel 35 is extracted from the inner peripheral side of the rubber layer 13, and, thereby, the liquid injection hose 11 is manufactured.

  Further, at both sides (both ends) of the hose body 12 in the length direction, the both ends of the protective tape 21 are peeled off at a length of about 130 to 150 mm (about 4/5 with respect to the crimping sleeves 24 and 26). From this position, both ends of the electric cable 20 are pulled out to the outside of the hose body 12 to form the lead-out portions 20A and 20B (see FIG. 2).

  Then, as shown in FIG. 2, joint portions 23 and 25 are attached to both ends of the liquid injection hose 11 thus manufactured via crimping sleeves 24 and 26, etc., thereby completing the liquid injection hose 11 as a product. Let Further, the lead-out portions 20A and 20B positioned on both ends of the electric cable 20 are drawn out from the cable insertion holes 24A and 26A of the crimping sleeves 24 and 26 to the outside.

  Then, at the stage where the liquid type sensors 27 and 28 are assembled to the outer peripheral side of the crimping sleeves 24 and 26 as shown in FIG. 2, the lead-out portions 20A and 20B of the electric cable 20 are connected to the liquid type sensors 27 and 28, respectively. Thus, an electric signal as a liquid type signal can be transmitted between the liquid type sensors 27 and 28 via the electric cable 20.

  Thus, according to the present embodiment, the electric cable 20 serving as a signal line for transmitting an electric signal between the one side in the length direction of the hose body 12 and the other side is located inside the outer wire 22 made of metal. Since it is set as the structure which sticks to the outer peripheral side of the hose body 12 using the protective tape 21 in the position used as follows, the following effects can be obtained.

  That is, when the electric cable 20 is spirally wound around and attached to the outer peripheral side of the hose body 12, the electric cable 20 is hose-wrapped by winding the adhesive protective tape 21 on the electric cable 20 spirally. It can be fixed to the outer peripheral side of the body at a predetermined helical pitch.

  And on the outer peripheral side of the hose body 12, the metal outer wire 22 is wound around the electrical cable 20 and the protective tape 21 (outside) with a relatively small helical pitch. When the injection hose 11 is carried along with an unloading operation or the like, it is possible to prevent the electric cable 20 from coming into direct contact with the ground or the like outside the hose body 12 by the outer wire 22 and to protect the electric cable 20 from the outside. At the same time, the electric cable 20 can be relaxed on the outer peripheral side of the hose body 12, thereby eliminating problems such as barracels.

  Moreover, since the electric cable 20 is wound around the hose body 12 at a spiral pitch different from that of the outer wire 22 and in the opposite direction, for example, when the liquid injection hose 11 is bent so as to be largely bent. Even when the outer wire 22 is bent and deformed so that the spiral shape changes, it is possible to suppress the change of the spiral shape of the electric cable 20 due to this, and the electric cable 20 is stabilized on the outer peripheral side of the hose body 12. It can be kept in a wound state.

  Thereby, between the one side in the length direction of the liquid injection hose 11 and the other side, an electric signal can be stably transmitted using the electric cable 20, which is sufficient for an impact from the outside. Strength can be secured. And the abrasion, damage, etc. of the electric cable 20 can be prevented over a long period of time, and the durability and life as the liquid injection hose 11 used for oil liquid loading and unloading work, etc., and the reliability including the electric cable 20 are improved. Can be improved.

  Further, according to the present embodiment, the cylindrical rubber formed by using the carbon-containing rubber material as the inner layer of the liquid injection hose 11 (the hose body 12) composed of a plurality of layers laminated to each other. The outer layer is constituted by a resin layer 18 formed by multilayer winding of a resin tape made of a synthetic resin material such as polypropylene.

  For this reason, the electrical conductivity of the entire injection hose 11 can be ensured by the inner rubber layer 13 containing carbon, and static electricity can be easily removed. Then, the inner surface 13A of the rubber layer 13 can be formed on a substantially uniform smooth surface as shown in FIG. Can be improved.

  In addition, since the resin layer 18 is formed by multilayerly winding a resin tape (for example, PP film) made of a synthetic resin material on the outside of the rubber layer 13, the rubber layer 13 may be deteriorated due to deterioration due to long-time use or the like. Even if a crack or the like occurs, it can be closed by the outer resin layer 18 and oil liquid leakage, ejection, and the like can be satisfactorily prevented.

  Moreover, the liquid injection hose 11 can be provided with appropriate flexibility by the inner rubber layer 13 and the resin layer 18 made of the outer PP film or the like. For this reason, it does not become too soft like a resin hose according to the prior art. For example, when the operator carries the liquid injection hose 11 on his / her shoulder, the joint portions 23 and 25 at both ends are connected to the operator's knees and shins. The workability during transportation can be improved.

  Further, between the inner rubber layer 13 and the outer resin layer 18, rubberized cord layers 15 and 17 in which reinforcing cords 15A and 17A are embedded in a rubber material are provided, and these rubberized cord layers 15 and 17 are provided. Since the metal wire 16 is provided between the rubber layer 13 and the resin layer 18 between the rubber layer 13 and the resin layer 18, the metal wire 16 is reinforced by the rubberized cord layers 15 and 17 and the metal wire 16. It is possible to increase the durability and life of the entire injection hose 11.

  In addition, a resin outer sheath 19 serving as a protective layer is wound around the outer side of the resin layer 18, and a metal outer wire 22 is spirally wound around the outer surface of the outer sheath 19. Therefore, the liquid injection hose 11 can ensure sufficient strength against an external impact or the like by the outer sheath 19 and the outer wire 22. For example, as the liquid injection hose 11 used for oil liquid loading and unloading work, etc. Durability and life can be increased.

  The rubber material used for the rubber layer 13 is made of nitrile rubber (NBR), and the synthetic resin material used for the resin layer 18 is made of polypropylene (PP). As a hose, oil resistance can be secured, and appropriate flexibility can be secured.

  On the other hand, in the manufacturing process of the injection hose 11, the spiral concavo-convex part 34 is formed in the inner cylindrical body 31 (rubber layer 13 and rubber) as shown in FIG. 12 by the rope winding process and the vulcanization process described above. Are formed on the drawing cord layers 15 and 17), and the same uneven portion is also formed on the outer resin layer 18. Thus, the entire filling liquid hose 11 is softened by the uneven portion 34 having a spiral shape. Can increase the sex.

  Further, by replacing the first, second, and third mandrels 30, 32, and 35 whose outer diameter dimension is gradually decreased, the inner cylindrical body 31 and the like are formed so that the inner diameter of the rubber layer 13 is gradually decreased. Since the inner surface 13A of the rubber layer 13 can be formed with smooth spiral irregularities as shown in FIG. 3, the inner surface 13A of the rubber layer 13 has a spiral undulation. An almost uniform smooth surface can be obtained.

  In addition, an outer sheath 19 is provided on the outer side of the resin layer 18, and an electric cable 20 is attached to the outer side of the resin layer 18 together with a protective tape 21, and a metal outer wire 22 is wound thereon. Thus, the liquid injection hose 11 can be secured with sufficient strength against external impacts and the like, and the durability and life of the electric cable 20 can be improved.

  Therefore, according to the present embodiment, the rubber layer 13 is provided on the inner side, and the resin layer 18 is formed on the outer side of the rubber layer 13 via the reinforcing layer 14. The overall weight can be reduced, and appropriate flexibility can be ensured. Thereby, while being able to improve workability | operativity when carrying the liquid injection hose 11, the loading / unloading operation | work of an oil liquid can be performed efficiently.

  In addition, the inner surface of the liquid injection hose 11 can be formed as a smooth surface by the inner surface 13A of the rubber layer 13, and the frictional resistance of the oil flowing through the inside can be reduced. For this reason, the foaming of the oil liquid etc. in the liquid injection hose 11 can be suppressed favorably, and the liquid cutting property can also be improved.

  Furthermore, since the liquid type signal can be transmitted through the electric cable 20 between the liquid type sensors 27 and 28 provided at both ends of the liquid injection hose 11, the loading and unloading operation of the oil liquid is performed until the two liquid type signals coincide with each other. Can be prohibited (stopped), and it is possible to prevent oils of different liquid types from being unintentionally loaded and mixed oil or the like.

  In the above-described embodiment, the case where the electric cable 20 as the signal line is provided on the outer cover 19 of the hose body 12 by being spirally wound from the outer peripheral side has been described as an example. However, the present invention is not limited to this, and an electric cable 20 'as a signal line is wound between the resin layer 18 of the hose body 12' and the jacket 19 'as in a modification shown in FIG. It is good also as a structure to provide. In this case, since the electric cable 20 'can be protected from the outside by the jacket 19', the protective tape 21 and the like described in the embodiment can be eliminated.

  Moreover, in the said embodiment, the liquid injection hose 11 used when unloading oil from the tank truck 9 was described as an example. However, the present invention is not limited to this. For example, the present invention may be applied to a flexible oil-resistant liquid hose used when supplying and discharging liquid such as chemicals. Further, the present invention may be applied to various flexible oil-resistant liquid hoses such as a hose used when loading liquid oil from a large oil storage tank installed in an oil storage base or the like into a tank truck.

It is a longitudinal cross-sectional view which shows the tank lorry vehicle with which the liquid injection hose by embodiment of this invention is applied, the underground tank of a gas station, etc. It is a front view which shows the injection hose in FIG. 1 as a single unit. It is sectional drawing which expands and shows the injection hose and the joint part of one side from the arrow III-III direction in FIG. It is a principal part expanded sectional view which shows the detailed cross-section of a liquid injection hose. It is an external view which shows an electric cable as a single unit. It is sectional drawing which expands and shows an electric cable from the arrow VI-VI direction in FIG. It is a longitudinal cross-sectional view which shows the process of shape | molding a rubber layer using a 1st mandrel. It is a longitudinal cross-sectional view which shows the process of shape | molding a rubber drawing cord layer etc. on the outer side of a rubber layer using a 1st mandrel. It is a longitudinal cross-sectional view which shows the state which extracted the 1st mandrel from the inner periphery of the inner side cylindrical body which consists of a rubber layer, a rubber drawing cord layer, etc. It is a longitudinal cross-sectional view which shows the state which inserted the 2nd mandrel in the inner periphery of the inner side cylindrical body. It is a partially broken external view which shows the state which wound the rope around the outer side of the inner cylindrical body which inserted the 2nd mandrel. It is an external view which shows the state which removed the rope after vulcanizing an inner cylindrical body, and extracted the 2nd mandrel. It is a partially broken external view which shows the state which inserted the 3rd mandrel in the inner periphery of the vulcanized inner side cylindrical body. It is a partially broken external view which shows the process of forming a resin layer by multilayer winding on the outer side of an inner cylindrical body using a 3rd mandrel. It is an external view of a partially broken view showing a state in which an electric cable is wound around an outer cover of a resin layer and provided. It is an external view of a partially broken state showing a state in which a protective tape is wound from above the electric cable. It is a partially broken external view which shows the state which wound and provided the metal outer wire on the outer side of the hose body from on the protective tape. It is a principal part expanded sectional view in the same position as FIG. 4 which shows the detailed cross-section of the injection hose by a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filling site 3 Underground tank 4 Oil liquid 6 Measuring machine 7 Liquid injection pipe 8 Joint 9 Tank truck 10 Tank 11 Liquid injection hose (flexible oil resistant liquid hose)
12 Hose body 13 Rubber layer 14 Intermediate reinforcing layer 15 Rubberized cord layer (first reinforcing rubber layer)
16 Metal wire 17 Rubberized cord layer (second reinforcing rubber layer)
18 Resin layer 19 Outer sheath 20 Electric cable (signal line)
21 Protective tape 22 Outer wire 23, 25 Joint part 24, 26 Crimp sleeve (fixing member)
27, 28 Liquid type sensor (detector)
30 First mandrel 31 Inner cylindrical body 32 Second mandrel 33 Rope 34 Concavity and convexity 35 Third mandrel

Claims (4)

A hose body formed as a long cylindrical body composed of a number of layers using a flexible material having corrosion resistance to oil and a spiral on the outer peripheral side of the hose body to protect the hose body from the outside In a flexible oil-resistant liquid hose consisting of a metal outer wire wound in a shape,
A flexible oil-resistant liquid characterized in that the hose body is fixedly provided with a signal wire spirally wound at a pitch different from that of the outer wire at a position inside the outer wire. hose.   The signal wire is spirally wound and provided on the outer peripheral surface of the hose body inside the outer wire, and the signal wire protects the hose body from oil signal and liquid resistance. The flexible oil-resistant liquid hose according to claim 1, wherein the flexible oil-resistant hose is configured to be fixed by winding a tape in a spiral shape.   The hose body is a cylindrical rubber layer formed using a rubber material that is located on the innermost side of the plurality of layers and contains carbon, and an intermediate reinforcing layer provided outside the rubber layer, A resin layer formed by multilayer winding of a resin tape made of a synthetic resin material provided on the outer side of the reinforcing layer, and a resin outer cover serving as a protective layer wound around the outer side of the resin layer The flexible oil-resistant liquid hose according to claim 1 or 2, wherein the signal line is provided between the outer wire and the jacket.   The hose body is a cylindrical rubber layer formed using a rubber material that is located on the innermost side of the plurality of layers and contains carbon, and an intermediate reinforcing layer provided outside the rubber layer, A resin layer formed by multilayer winding of a resin tape made of a synthetic resin material provided on the outer side of the reinforcing layer, and a resin sheath serving as a protective layer wound around the outer side of the resin layer The flexible oil-resistant liquid hose according to claim 1, wherein the signal line is provided between the resin layer and the jacket.

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