JP2009068536A - Marine hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a marine hose for easily and accurately determining replacing timing. <P>SOLUTION: A deformation quantity detecting part 44 of a control unit 40 can detect curvatures (a deformation quantity in the hose bending direction) in predetermined ranges AR1, AR2 and AR3 in respective axial directions of a hose body 10, and since a conversion processing part 46 of the control unit 40 can convert the curvatures of the predetermined ranges AR1, AR2 and AR3 in respective axial directions detected by the deformation quantity detecting part 44 into a durability influence numeric value, a plurality of times of bending directional deformation are caused in the predetermined ranges AR1, AR2 and AR3 in the respective axial directions of the hose body 10, and even if the size of the deformation is in variety, the durability influence numeric value is provided with the deformation. That is, the replacing timing of the marine hose can be determined based on a cumulative result of cumulating the durability influence numeric values provided with the deformations. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a marine hose for liquid fuel transportation for transporting liquid fuel such as crude oil from a tanker to an onshore tank.

In general, this type of marine hose includes a hose body provided with an oil-resistant inner rubber layer and a reinforcing layer disposed on the outer side of the inner rubber layer, and a base provided at each end of the hose body in the axial direction. And a stress detection sensor provided in the vicinity of the fastening portion of the reinforcing layer on the outer peripheral surface side of the base, and a memory for storing the detected stress value when a stress value equal to or greater than a predetermined threshold is detected by the stress detection sensor Means and a transmission means for transmitting the stress value stored in the storage means to the land, and the inspector determines the replacement time of the marine hose based on the number of times the stress exceeding the predetermined threshold is inputted and the stress value. What was made to do is known (for example, refer patent document 1).
Japanese Patent Laid-Open No. 11-153284

  By the way, since the deformation state of the marine hose varies depending on the place where the marine hose is arranged and the situation of the place, a tendency of the detection result of the stress value by the stress detection sensor also appears depending on the place of arrangement. For example, when connecting a marine tanker and an onshore tank with multiple marine hoses, the marine hose arranged on the tanker side is more likely to be deformed by sea swell than the marine hose arranged on the land side. In the marine hose arranged on the tanker side, the stress value detected by the stress detection sensor becomes larger, and the number of times the stress exceeding the predetermined threshold is detected tends to increase. In addition, when the marine hose is placed on the sea in a state where the undulation is large, the stress value detected by the stress detection sensor changes depending on the state of the sea swell. The number of times to be greatly increased. That is, there are various stress values detected by the stress detection sensor, and the number of times a stress exceeding a predetermined threshold is detected is extremely large.

  Here, in the marine hose, the inspector judges the replacement time of the marine hose based on the number of times the stress exceeding the predetermined threshold is inputted and the stress value. The trend varies depending on the hose location and the situation, and the number of times stress above a predetermined threshold is input is very high, so the replacement time is determined based on the number of times stress input above the predetermined threshold and the stress value. Requires considerable knowledge and experience, and there is a problem in that the judgment of the replacement time varies depending on the experience of the inspector.

  Furthermore, in recent years marine hoses have come to be used in the open ocean, but large undulations often occur in the open ocean, and the tendency of stress applied to marine hoses has become different from the conventional one. There is also a problem that the inspector cannot accurately determine the replacement time of the marine hose based on the conventional experience.

  The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a marine hose capable of easily and accurately judging the replacement time.

  In order to achieve the above object, the present invention provides a hose body having a multilayer structure provided with at least an inner rubber layer having oil resistance to a predetermined liquid fuel and a reinforcing layer disposed outside the inner rubber layer, and a hose. A marine hose provided with caps respectively provided at both ends in the axial direction of the main body, provided in the hose main body, and a deformation amount detecting means for detecting a deformation amount in the hose bending direction in a predetermined axial range of the hose main body; Conversion means for converting the deformation amount detected by the deformation amount detection means into a durability influence value representing the influence on the durability of the hose body based on a predetermined standard.

  Accordingly, the deformation amount detecting means capable of detecting the deformation amount in the hose bending direction within the predetermined axial range of the hose body, and the deformation amount detected by the deformation amount detecting means to the durability of the hose body based on a predetermined reference. Conversion processing means for converting into a durability influence value that represents the impact, for example, the hose body is repeatedly deformed by sea swell, and the hose bending direction is a plurality of times in the axial direction predetermined range of the hose body. Even when deformation occurs and the magnitude of each deformation varies, a durability effect value can be obtained for each deformation.

  According to the present invention, for example, the hose body is repeatedly deformed by sea swell, and the hose bending direction is deformed a plurality of times in the axial predetermined range of the hose body, and the magnitude of each deformation varies. Since the durability influence value can be obtained for each deformation, the replacement time of the marine hose can be determined based on the cumulative result of accumulating the durability influence values obtained for each deformation. That is, the marine hose replacement time can be easily and accurately determined regardless of the amount and number of deformations in the bending direction applied to the hose body, thereby preventing environmental pollution due to liquid fuel leakage from the hose body. This is extremely advantageous.

  1 to 5 show an embodiment of the present invention. FIG. 1 is a sectional view of a main part of a marine hose, FIG. 2 is a side view of the marine hose, FIG. 3 is a block diagram of a control unit, and FIG. FIG. 5 is a table showing an example of the conversion processing result.

  This marine hose includes a hose body 10 and caps 20 provided at both ends of the hose body 10 in the axial direction. This marine hose is used, for example, to connect a tanker anchored at sea and an onshore tank and feed crude oil from the tanker to the onshore tank.

  The hose body 10 includes an inner rubber layer 11 having oil resistance against crude oil, a reinforcing layer 12 disposed on the outer peripheral surface side of the inner rubber layer 11, and a buoyancy material layer 13 disposed on the outer peripheral surface side of the reinforcing layer 12. A cover rubber layer 14 formed so as to cover the inner rubber layer 11, the reinforcing layer 12 and the buoyancy material layer 13. That is, the hose body 10 has a multilayer structure having the layers 11, 12, 13, and 14.

  The inner rubber layer 11 is made of a known oil-resistant rubber such as acrylonitrile butadiene rubber, and is provided on the innermost radial direction of the hose body 10. That is, crude oil flows through the inner rubber layer 11 of the hose body 10.

  The reinforcing layer 12 includes, for example, a first withstand voltage cord layer 12a and a second withstand voltage cord layer 12b. Each pressure-resistant cord layer 12a, 12b is a rubber layer reinforced with nylon cord, polyester cord, metal cord or the like, and has a well-known structure used for the hose body 10.

  The buoyancy material layer 13 is made of a sponge-like member and is provided to float the marine hose on the sea.

  The cover rubber layer 14 is made of a rubber material having weather resistance such as styrene butadiene rubber or chloroprene rubber.

  In addition, the marine hose having the inner rubber layer 11, the reinforcing layer 12, the buoyancy material layer 13 and the cover rubber layer 14 is general, and the buoyancy material layer 13 may be omitted if necessary. Other configurations can be added.

  Each base 20 is made of a metal material and is detachably connected to the base 20 of another marine hose.

  A plurality (three in this embodiment) of first conductive elastomer members 31 are provided on the outer peripheral surface side of the reinforcing layer 12 in the first predetermined axial range AR1 of the hose body 10, and each first conductive elastomer member is provided. 31 are arranged at intervals in the circumferential direction of the hose body 10. The first predetermined axial range AR <b> 1 is one end side in the axial direction of the hose body 10, and is near the attachment portion with the base 20. Each first conductive elastomer member 31 is formed, for example, in the shape of a belt extending in the axial direction of the hose body 10, and isoprene rubber, styrene butadiene rubber, butyl rubber, chloroprene rubber, acrylonitrile butadiene rubber, etc. blended with known conductive carbon. Made of rubber. In addition, each first conductive elastomer member 31 can be made of natural rubber mixed with conductive carbon, and can be made of other materials having rubber-like elasticity mixed with conductive carbon. It is. Furthermore, it is also possible to use other powdery reinforcing agents or powdery fillers having conductivity instead of conductive carbon.

  That is, each first conductive elastomer member 31 has conductivity. Further, when the first conductive elastomer member 31 is deformed so as to be pulled in the axial direction of the hose body 10, the interval between the conductive carbons in the first conductive elastomer member 31 becomes large, and the first conductive elastomer member 31. The resistance value between one end in the length direction and the other end increases. Further, when each first conductive elastomer member 31 is deformed so as to be compressed in the axial direction of the hose body 10, the interval between the conductive carbons in the first conductive elastomer member 31 is reduced, and the first conductive elastomer is reduced. The resistance value between the length direction one end and the other end of the member 31 becomes small.

  A plurality (three in this embodiment) of second conductive elastomer members 32 are provided on the outer peripheral surface side of the reinforcing layer 12 in the second axial predetermined range AR2 of the hose body 10, and each second conductive elastomer member is provided. 32 are mutually spaced apart in the circumferential direction of the hose body 10. The second predetermined range AR2 in the axial direction is the other end side in the axial direction of the hose body 10 and is in the vicinity of the attachment portion with the base 20. Each second conductive elastomer member 32 is formed, for example, in the shape of a belt extending in the axial direction of the hose body 10, and isoprene rubber, styrene butadiene rubber, butyl rubber, chloroprene rubber, acrylonitrile butadiene rubber, etc. blended with known conductive carbon. Made of rubber. Further, each second conductive elastomer member 32 can be made of natural rubber mixed with conductive carbon, and can be made of other materials having rubber-like elasticity mixed with conductive carbon. It is. Furthermore, it is also possible to use other powdery reinforcing agents or powdery fillers having conductivity instead of conductive carbon.

  That is, each second conductive elastomer member 32 has conductivity. Further, when the second conductive elastomer member 32 is deformed so as to be pulled in the axial direction of the hose body 10, the interval between the conductive carbons in the second conductive elastomer member 32 increases, and the second conductive elastomer member 32. The resistance value between one end in the length direction and the other end increases. Further, when each second conductive elastomer member 32 is deformed so as to be compressed in the axial direction of the hose body 10, the interval between the conductive carbons in the second conductive elastomer member 32 becomes small, and the second conductive elastomer. The resistance value between the length direction one end and the other end of the member 32 becomes small.

  A plurality (three in this embodiment) of third conductive elastomer members 33 are provided on the outer peripheral surface side of the reinforcing layer 12 in the third axial predetermined range AR3 of the hose body 10, and each third conductive elastomer member is provided. 33 are mutually spaced apart in the circumferential direction of the hose body 10. The third axial predetermined range AR3 is the axially central side of the hose body 10. Each of the third conductive elastomer members 33 is formed, for example, in the shape of a belt extending in the axial direction of the hose body 10, and isoprene rubber, styrene butadiene rubber, butyl rubber, chloroprene rubber, acrylonitrile butadiene rubber, etc. blended with known conductive carbon. Made of rubber. Further, each third conductive elastomer member 33 can be made of natural rubber mixed with conductive carbon, and can be made of other materials having rubber-like elasticity mixed with conductive carbon. It is. Furthermore, it is also possible to use other powdery reinforcing agents or powdery fillers having conductivity instead of conductive carbon.

  That is, each third conductive elastomer member 33 has conductivity. Further, when the third conductive elastomer member 33 is deformed so as to be pulled in the axial direction of the hose body 10, the interval between the conductive carbons in the third conductive elastomer member 33 becomes large, and the third conductive elastomer member 33. The resistance value between one end in the length direction and the other end increases. Further, when each third conductive elastomer member 33 is deformed so as to be compressed in the axial direction of the hose body 10, the interval between the conductive carbons in the third conductive elastomer member 33 is reduced, and the third conductive elastomer is formed. The resistance value between the length direction one end and the other end of the member 33 becomes small.

  A control unit 40 is provided on one end side in the axial direction of the hose body 10. The control unit 40 includes a known first detector 41 that can detect the resistance value of each first conductive elastomer member 31 and a known first detector that can detect the resistance value of each second conductive elastomer member 32. 2 detector 42, a known third detector 43 capable of detecting the resistance value of each conductive elastomer member 33, a deformation amount detection unit 44 connected to each detector 41, 42, 43, A deformation amount storage unit 45 connected to the amount detection unit 44, a conversion processing unit 46 connected to the deformation amount storage unit 45, a cumulative processing storage unit 47 connected to the conversion processing unit 46, and a cumulative processing It has a fatigue estimation unit 48 connected to the storage unit 47 and a display device 49 (see FIG. 3).

  The first detector 41 is connected to one end in the length direction of each first conductive elastomer member 31 via a conductive wire 41a, and each first conductive elastomer member 31 via a conductive wire (not shown). Are connected to the other end in the longitudinal direction. The second detector 42 and the third detector 43 are also connected to one end in the length direction of the respective conductive elastomer members 32 and 33 via conductors (not shown), and are respectively connected via conductors (not shown). The conductive elastomer members 32 and 33 are connected to the other end in the length direction.

  The deformation amount detection unit 44 is composed of a known microcomputer, and can detect the curvatures (deformation amounts in the hose bending direction) of the respective axial ranges AR1, AR2, AR3 according to the detection results of the detectors 41, 42, 43. It is. For example, when deformation in the bending direction is applied to the first predetermined axial range AR1 with a predetermined curvature, two of the first conductive elastomer members 31 are deformed in a pulling direction and one is compressed. Or one of the first conductive elastomer members 31 changes in the direction in which one of the first conductive elastomer members 31 is deformed. Moreover, a predetermined tendency appears between the total amount of change in resistance value of each first conductive elastomer member 31 and the curvature of the first predetermined axial range AR1, and this tendency is influenced by the bending direction of the hose body 10. Hardly receive. Furthermore, for example, various curvatures are given to the first predetermined axial range AR1 on land, and the change amount of the resistance value of each conductive elastomer member 31 at that time is detected, and the resistance of each first conductive elastomer member 31 is detected. By obtaining the relationship between the total amount of change in value and the curvature of the first predetermined axial range AR1, the deformation amount detection unit 44 determines whether the first predetermined axial range AR1 corresponds to the detection result of the first detector 41. The curvature can be detected.

  The deformation amount storage unit 45 is composed of a known hard disk or the like, and can store the curvature detected by the deformation amount detection unit 44 for each of the predetermined ranges AR1, AR2, AR3 in the axial direction. Here, the deformation amount storage unit 45 is configured to store, for example, the maximum value of the curvature detected exceeding a predetermined threshold, and the curvature of the first predetermined axial range AR1 is as shown in FIG. When changing, the curvatures of the points P1 and P2 are stored. It is also possible to continuously store the curvature detected by the deformation amount detection unit 44 without providing a threshold value.

  The conversion processing unit 46 is formed of a known microcomputer, and converts the curvature stored in the deformation amount storage unit 45 into a durability influence value that represents the effect on the durability of the hose body 10. For example, as shown in FIG. 5, when a plurality of curvatures are stored in the deformation amount storage unit 45 for each of the predetermined axial ranges AR1, AR2, and AR3, each curvature is converted into a durability influence value. It is processed. Here, the influence of the magnitude of the curvature on the durability of the hose body 10 becomes several times to several hundred times more than twice when the curvature of the hose body 10 is doubled, for example. This is what the applicant has gained from experience. In addition, the magnification with respect to the curvature varies depending on the curvature, and also varies depending on the size, structure, material, and the like of the hose body 10, but from the experience as described above, it depends on the curvature, dimension, structure, material, and the like of the hose body 10. The magnification can be set. That is, the magnification can be set based on the applicant's experience. In the present embodiment, the magnification is set to 10 when the curvature is doubled. That is, the magnification corresponds to a predetermined standard described in the claims, and the magnification varies depending on the curvature, size, structure, material, and the like of the hose body 10 and is set based on experience and test results. is there.

  The accumulation process storage unit 47 is composed of a well-known microcomputer. The accumulation process storage unit 47 accumulates the durability influence numerical values obtained by the conversion processing unit 46 for each of the predetermined axial ranges AR1, AR2, AR3, and stores the accumulation result. It has become.

  The fatigue level estimation unit 48 is formed of a known microcomputer, and estimates the fatigue level of the hose body 10 for each of the predetermined ranges AR1, AR2, AR3 in the axial direction based on the accumulation result of the accumulation processing storage unit 47. . That is, when the marine hose is collected after use, a destructive test or a disassembly test is performed using the marine hose, and the fatigue level of the hose body 10 of the marine hose is generally estimated. However, the hose body 10 is based on the comparison result between the fatigue level of the first predetermined axial range AR1 estimated by the destructive test and the disassembly test and the cumulative result of the durability influence numerical value of the first predetermined axial range AR1. It is possible to estimate the fatigue level of the first predetermined axial range AR1. For example, when the fatigue level of the hose body 10 by a destructive test or a disassembly test is 40% (residual life is 60%), if the cumulative result is 400,000, the fatigue level is when the cumulative result is 400,000. Is estimated to be 40%, and when the cumulative result is 500,000, the fatigue level is estimated to be 50%.

  The display device 49 displays the accumulation result of the accumulation processing storage unit 47 for each axial predetermined range AR1, AR2, AR3, and the estimation result of the fatigue level estimation unit 48 for each axial predetermined range AR1, AR2, AR3. It consists of a known device to be displayed, and is provided in a portion exposed from the hose body 10 in the control unit 40.

  The marine hose configured as described above is disposed on the sea or the like, and the hose body 10 is repeatedly subjected to deformation in the bending direction due to sea swells or the like.

  Here, the deformation amount detection unit 44 of the control unit 40 can detect the curvatures (deformation amounts in the hose bending direction) in the axial predetermined ranges AR1, AR2, and AR3 of the hose body 10, respectively. Since the portion 46 can convert the curvatures of the predetermined ranges AR1, AR2, and AR3 in the axial directions detected by the deformation amount detection unit 44 into durability influence numerical values, the hose body 10 is repeatedly deformed by sea swell. At the same time, even in the case where a plurality of deformations in the bending direction occur in each of the predetermined ranges AR1, AR2, AR3 in the axial direction of the hose body 10 and the magnitude of each deformation varies, the durability influence value is obtained for each deformation. It is done.

  As described above, according to the present embodiment, the marine hose replacement time can be determined based on the cumulative result obtained by accumulating the durability influence values obtained for the respective deformations. Therefore, the bending direction applied to the hose body 10 Regardless of the amount and number of deformations, the marine hose replacement time can be easily and accurately determined. That is, it is extremely advantageous in preventing environmental contamination due to leakage of liquid fuel from the hose body 10.

  Further, based on changes in resistance values of a plurality of conductive elastomer members 31, 32, 33 that are provided in the axial predetermined ranges AR1, AR2, AR3 of the hose body 10 at intervals in the circumferential direction of the hose body 10. Since the curvature (the amount of deformation in the bending direction) in each axial predetermined range AR1, AR2, AR3 of the hose body 10 is configured to be detected by the deformation amount detection unit 44, the amount of deformation in the bending direction of the hose body 10 can be ensured. Can be detected. The conductive elastomer members 31, 32, 33 are used, and the conductive elastomer members 31, 32, 33 can be bonded to the layers 11, 12, 14 constituting the hose body 10, and the layers 11, 12, Therefore, the durability of the hose body 10 is not lowered in order to detect the deformation amount of the hose body 10 in the bending direction.

  In addition, since the deformation amount detection unit 44 is configured to be able to detect curvatures (deformation amounts in the hose bending direction) in a plurality of predetermined axial ranges AR1, AR2, and AR3 that are different from each other in the axial direction of the hose body, It becomes possible to judge the replacement time of the hose body 10 more accurately.

  Here, according to the knowledge obtained by the applicant through experience, the degree of fatigue on the axial end portion side and the central side of the hose body 10 may differ depending on the location where the marine hose is disposed. On the other hand, the deformation (detection amount in the hose bending direction) in the first axial predetermined range AR1 and the second axial predetermined range AR2 on the axial end side of the hose body 10 is determined by the deformation amount detection unit 44. Since it is configured to detect and detect the curvature (the amount of deformation in the hose bending direction) in the third axial direction predetermined range AR3 on the axial center side of the hose body 10, the hose body depends on the position where the marine hose is arranged. Even when the axial end portions of 10 and the fatigue levels on the center side are different, the replacement time of the hose body 10 can be accurately determined.

  Moreover, since the fatigue degree estimation part 48 which estimates the fatigue degree of the hose main body 10 based on the accumulation result which accumulated the conversion process result of the conversion processing part 46 of the control unit 40 is provided, the estimation result of the fatigue degree estimation part 48 is provided. Based on this, it is possible to determine the replacement time of the hose body 10. That is, anyone can easily and reliably determine the replacement time of the hose body 10, which is extremely advantageous in preventing environmental pollution due to leakage of liquid fuel from the hose body 10.

  In the present embodiment, the curvature detected by the deformation amount detection unit 44 is stored in the deformation amount storage unit 45 for each of the predetermined axial ranges AR1, AR2, AR3, and the conversion processing unit 46 stores the curvature in the deformation amount storage unit 45. Each of the stored curvatures is converted into a durability effect value. On the other hand, the curvature detected by the deformation amount detection unit 44 can be converted into a durability influence coefficient by the direct conversion processing unit 46.

  Further, in the present embodiment, the fatigue level of the hose body 10 is estimated for each axial range AR1, AR2, AR3 by the fatigue level estimation unit 48 based on the cumulative result of the cumulative processing storage unit 47. . On the other hand, even when the fatigue level estimation unit 48 is not provided, for example, the worker compares the cumulative result of the durability influence value stored in the cumulative processing storage unit 47 with a predetermined reference value, and from the comparison result, the hose Even when the fatigue level of the main body 10 is estimated, the replacement time of the hose main body 10 can be easily and accurately determined.

  In the present embodiment, the control unit 40 is provided with a deformation amount detection unit 44, a deformation amount storage unit 45, a conversion processing unit 46, a cumulative processing storage unit 47, a fatigue level estimation unit 48, and a display device 49. However, instead of these, an information transmitting device is provided in the control unit 40, and an information receiving device is provided outside the marine hose. The information receiving device includes a deformation amount detection unit 44, a deformation amount storage unit 45, a conversion processing unit 46, a cumulative amount. It is also possible to provide a processing storage unit 47, a fatigue level estimation unit 48, and a display device 49. Here, it is possible to use a known transponder as disclosed in JP-A-11-153284 for the information transmitting apparatus and the information receiving apparatus. As a result, the information receiving apparatus can be provided on land, which is extremely advantageous in easily and accurately determining the replacement time of the hose body 10.

  In the present embodiment, each of the axial predetermined ranges AR1, AR2, AR3 is provided with three conductive elastomer members 31, 32, 33. However, each axial predetermined range AR1, AR2, AR3 is shown. If two or more conductive elastomer members 31, 32, and 33 are provided, it is possible to detect the curvature of each of the predetermined axial ranges AR1, AR2, and AR3. Here, when there are two conductive elastomer members 31, 32, 33, it is necessary to increase the width dimension of each of the conductive elastomer members 31, 32, 33. It is preferable that three or more conductive elastomer members 31, 32, and 33 are provided in AR1, AR2, and AR3.

  In the present embodiment, the conductive elastomer members 31, 32, and 33 are provided on the outer peripheral surface side of the reinforcing layer 12. However, they are disposed on the inner peripheral surface side of the reinforcing layer 12 and other positions. Is also possible.

  In the present embodiment, the conductive elastomer members 31, 32, and 33 are formed in a band shape. However, the conductive elastomer members 31, 32, and 33 having other shapes may be used.

  Moreover, in this embodiment, although what showed the deformation amount of the hose main body 10 in the hose bending direction as a curvature was shown, axial direction both ends of each axial direction predetermined range AR1, AR2, AR3 of the hose main body 10 are shown. It is also possible to detect the change in angle as a deformation amount, and it is also possible to detect other deformation amounts.

  In the present embodiment, the inner rubber layer 11 is made of oil-resistant rubber having oil resistance to crude oil. However, the rubber material for the inner rubber layer 11 is selected according to the type of liquid fuel to be fed. By doing so, it is possible to achieve the same effect as described above in the marine hose for various liquid fuels.

Sectional drawing of the principal part of the marine hose which shows one Embodiment in this invention Side view of marine hose Control box block diagram Graph showing an example of the curvature detection result Table showing an example of conversion processing results

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Hose body, 11 ... Inner rubber layer, 12 ... Reinforcement layer, 12a ... First pressure cord layer, 12b ... Second pressure cord layer, 13 ... Buoyant material layer, 14 ... Cover rubber layer, 20 ... Base, 31 ... First conductive elastomer member, 32 ... second conductive elastomer member, 33 ... third conductive elastomer member, 40 ... control unit, 41 ... first detector, 41a ... conductive wire, 42 ... second detector, 43 ... Third detector 44 ... Deformation amount detection unit 45 ... Deformation amount storage unit 46 ... Conversion processing unit 47 ... Accumulation process storage unit 48 ... Fatigue degree estimation unit 49 ... Display device AR1 ... First axis Direction predetermined range, AR2 ... second axial direction predetermined range, AR3 ... third axial direction predetermined range.

Claims (5)

A hose body having a multilayer structure provided with at least an inner rubber layer having oil resistance to a predetermined liquid fuel and a reinforcing layer disposed outside the inner rubber layer, and provided at both axial ends of the hose body. In a marine hose with a base,
Deformation amount detecting means provided in the hose body and detecting the deformation amount in the hose bending direction in the axial predetermined range of the hose body;
A marine hose comprising conversion processing means for converting a deformation amount detected by the deformation amount detection means into a durability influence value representing an influence on the durability of the hose body based on a predetermined standard. The deformation amount detection means is configured to have a predetermined axial direction of the hose body based on a change in the resistance value of a plurality of conductive elastomer members provided in the circumferential direction of the hose body within a predetermined range in the axial direction of the hose body. The marine hose according to claim 1, wherein the marine hose is configured to detect a deformation amount in a bending direction in the range. The deformation amount detecting means is configured to detect deformation amounts in the hose bending direction in a plurality of predetermined ranges in the axial direction that are different from each other in the axial direction of the hose body. Marine hose. The deformation amount detecting means detects a deformation amount in the hose bending direction in a predetermined axial range on the axial end side of the hose body, and deforms in the hose bending direction in the axial predetermined range on the axial center side of the hose body. The marine hose according to claim 3, wherein the marine hose is configured to detect the amount. The marine hose according to claim 1, 2, 3 or 4, further comprising a fatigue level estimation unit that estimates a fatigue level of the hose body based on a cumulative result obtained by accumulating the conversion results of the conversion processing unit.

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