JP6984876B2 - Transport pipes with wear detection function, transport pipe manufacturing method, wear detection method, and transport pipe operation method - Google Patents

Description

The present invention relates to a transport pipe used for transporting a slurry which is a mixture of a wearable substance such as a solid substance and a liquid, or a wearable substance such as powder or pellets.

Transport pipes are used for transporting ores excavated on the seabed to marine vessels and for transporting slurries, powders, pellets, etc. in various plants.
FIG. 23 is a partial transmission view of the transport pipe, FIG. 23 (a) shows a flexible transport pipe having a bent portion, and FIG. 23 (b) shows a transport pipe having no bent portion. ..
As shown in FIG. 23, in the transport pipe (wear resistant hose) 10, one end 10a and the other end 10b are each connected to the pipe 1 via a joint 20. In the inner pipe 11 of the transport pipe 10, a slurry or a wearable substance 2 in which a wearable substance 2 such as powder or pellets and a liquid are mixed flows from one end portion 10a toward the other end portion 10b. ..
The transport pipe (wear resistant hose) 10 shown in FIG. 23 (a) has four bends from one end 10a to the other end 10b. Further, the transport pipe 10 shown in FIG. 23 (b) has no bent portion from one end 10a to the other end 10b.
As shown in FIG. 23A, when the wear-resistant hose 10, which is a kind of transport pipe, is used for transporting the slurry or the wear-resistant substance 2, the bent outer portion of the wear-resistant hose 10 having a large curvature. The inner pipe 11 (the outer portion of the curved flow path of the wear-resistant hose 10) is susceptible to significant wear damage locally due to the collision of the wear-resistant substance 2. Therefore, the bent outer portion of the inner pipe 11 becomes the wear progress region X in which the wear progresses faster than the other portions (the portion of the inner pipe 11 surrounded by the oval in FIG. 23 (a)). When the wear limit is reached at any one of the inner pipes 11, the wear-resistant hose 10 as a whole can be used in a short time even if the other parts of the wear-resistant hose 10 have no wear damage. It becomes impossible and is forced to be replaced. The replacement work of the wear-resistant hose 10 is complicated in itself, and at the same time, the time and economic loss due to the stoppage of the entire system during the work is enormous.
As shown in FIG. 23B, even in the transport pipe 10 other than the wear-resistant hose, when transporting a slurry having a larger specific gravity of the solid phase than the liquid phase or a wearable substance 2 such as pellets, bending is performed. Even in a straight pipe portion without a hose, the progress of wear is biased to the vertically lower side of the inner pipe 11 due to the influence of gravity. Therefore, the portion vertically below the inner pipe 11 becomes the wear progress region X in which the wear progresses faster than the other parts (the portion of the inner pipe 11 surrounded by the oval in FIG. 23 (b)). When the wear limit is reached at any one of the inner pipes 11, the transport pipe is reached when the wear of the vertically lower portion reaches the limit even if there is no wear damage on the vertically upper side or the side surface. The entire 10 becomes unusable.
As described above, the wear damage of the inner pipe 11 caused by the collision of the wearable substance 2 does not progress uniformly in the entire inner pipe 11, but the degree of progress varies depending on the portion.
Therefore, when the transport pipe 10 such as an wear-resistant hose is used for transporting the slurry or the wearable substance 2, the operability of the transport pipe 10 as a whole is maintained as long as possible while avoiding damage due to local wear of the inner pipe 11. It is desirable to take measures to extend the life of the transport pipe 10. Then, in order to take appropriate measures, it is necessary to accurately detect the angle range around the pipe axis of the portion where the wear has progressed.

Here, in Patent Document 1, a steel wire is arranged on the outside of the rubber tube, the conductive material is spirally joined on the inside, and the rubber tube is cracked or corroded and the conductive material is cut, so that the rubber tube is cut. It is disclosed to detect anomalies.
Further, in Patent Document 2, in a hose such as a hose for pumping mortar, which needs to detect wear or breakage of the hose, a conductor wire spirally embedded on the inner peripheral surface side of the hose and the outer peripheral surface side of the hose are described. It is disclosed that damage to the inner peripheral surface and the outer peripheral surface of a hose can be electrically detected at the same time by connecting the spirally embedded conductors in series to each other and examining the continuity state of the connected conductors. ..
Further, in Patent Document 3, a pair of separated electrically conductive detection wires are provided between the inner surface layer and the pressure resistant reinforcing layer in the longitudinal direction of the hose, and the detection wires are connected at one end of the hose. It is disclosed that the other end is pulled out of the hose to detect when the inner layer is worn and damaged by a fluid.

Gazette No. 53-140912 Japanese Unexamined Patent Publication No. 2010-138991 Japanese Unexamined Patent Publication No. 8-270844

None of the inventions described in Patent Documents 1 to 3 can detect the angle range around the tube axis of the portion of the hose or the like where the wear has progressed. Therefore, it is difficult to avoid damage due to local wear of the inner pipe such as a hose.

Therefore, the present invention relates to a transport pipe for transporting a wearable substance, a transport pipe having a wear detection function for detecting an angle range around a pipe axis of a portion where wear of the transport pipe has progressed, a method for manufacturing the transport pipe, and a wear detection method. , And to provide a method of operating the transport pipe.

The transport pipe having the wear detection function corresponding to the first aspect of the present invention is a transport pipe used for transporting a slurry in which a wearable substance and a liquid are mixed or a wearable substance, and is inside or inside the inner pipe of the transport pipe. A structure is provided in which a plurality of wear detection lines are arranged on the outer periphery and the inside of the pipe according to the angle range around the pipe axis, and the multiple wear detection lines are located relatively close to the inner surface of the inner pipe in the angle range in charge. It is characterized in that it is arranged so as to pass through a position relatively far from the inner surface of the inner pipe or the outer circumference of the inner pipe in an angle range outside the charge.
According to the first aspect of the present invention, the angle range around the pipe axis of the portion of the transport pipe where wear has progressed can be detected by using the wear detection line. In addition, the portion of the angle range in charge of wear detection can be clearly divided for each wear detection line.

The transport pipe having the wear detection function corresponding to the second aspect is a transport pipe used for transporting a slurry in which a wearable substance and a liquid are mixed or a wearable substance, and is inside or inside the inner pipe of the transport pipe. It is characterized by having a structure in which a plurality of wear detection lines are arranged according to an angle range around the tube axis on the outer periphery and the inside of the tube, and the wear detection lines are formed of a conductive coating film.
According to the second aspect of the present invention, the angle range around the pipe axis of the portion of the transport pipe where wear has progressed can be detected by using the wear detection line formed of the conductive coating film.

The present invention according to claim 3 is characterized in that the wear detection wire is spirally wound and arranged.
According to the third aspect of the present invention, the wear detection line is less likely to be broken even in a place having a large curvature, and reliability can be improved particularly when applied to a flexible tube having a large bent portion .

請Motomeko 4 the invention described is characterized in that the plurality of wear-detection lines having a common line to be connected.
According to the fourth aspect of the present invention, the continuity inspection can be performed only at one end of the transport pipe, so that the work efficiency is improved. Further, when the continuity inspection is performed only at the end portion, for example, it is not necessary to provide a return line for each of the plurality of wear detection lines, and the return line can be shared by the common line.

The present invention according to claim 5 is characterized in that a protective layer or a reinforcing layer is provided on the outside of the inner pipe.
According to the fifth aspect of the present invention, it is possible to further prevent the wear detection wire from being broken except for the wear from the inner surface side of the inner pipe.

The present invention according to claim 6 is characterized in that the protective layer or the reinforcing layer is color-coded into a plurality of colors according to an angle range around a pipe axis in which a plurality of wear detection lines are arranged.
According to the sixth aspect of the present invention, by color-coding, the angle range around the pipe axis including the wear position of the inner pipe detected by the breakage (non-conduction) of the wear detection line can be obtained from the outside of the transport pipe. However, it can be easily identified by visually recognizing the corresponding color.

The present invention according to claim 7 is characterized in that the plurality of wear detection lines have a color coating corresponding to the color coding of the plurality of colors.
According to the seventh aspect of the present invention, it becomes easy to correspond to the angle range around the pipe axis including the wear position of the inner pipe detected by the breakage (non-conduction) of the wear detection line.

The present invention according to claim 8 is characterized in that the inner tube and the wear detection line are arranged in multiple layers so that the progress of wear in the depth direction can be detected.
According to the eighth aspect of the present invention, it is possible to detect the degree of progress (degree of wear) of wear generated in the inner pipe in the depth direction .

The present invention請Motomeko 9 wherein the coated surface of the conductive coating, characterized in that formed on the inner surface in a direction substantially perpendicular to the inner tube.
According to the ninth aspect of the present invention, the degree of progress of wear generated in the inner pipe in the depth direction is detected based on the degree of decrease of the coating film surface in the direction substantially orthogonal to the inner surface of the inner pipe. be able to. Further, for example, by widening the width of the coating film surface, it is possible to detect the progress of wear in the depth direction even when the wear detection layer is a single layer.

In the method for manufacturing a transport pipe according to claim 10 , a plurality of wear detection lines are arranged on a rod-shaped or plate-shaped inner pipe material, and the inner pipe material and a plurality of wear detection lines are wound around the inner pipe material. The feature is that the transport pipe is completed by sequentially adhering the adjacent side surfaces.
According to the tenth aspect of the present invention, it is possible to efficiently form a transport pipe having a wear detection wire wound in a spiral shape.

In the method for manufacturing a transport pipe according to claim 11 , a plurality of wear detection lines are arranged on a rod-shaped or plate-shaped inner pipe material, and the inner pipe material and a plurality of wear detection lines are wound around the inner pipe material. The transport pipe is completed by sequentially adhering the adjacent side surfaces, and a conductive coating material is applied to the side surfaces of the inner pipe material according to the angle range around the pipe axis to form a conductive coating film.
According to the eleventh aspect of the present invention, it is possible to efficiently form a transport pipe in which a wear detection line is formed of a conductive paint. Further, since the conductive paint can be applied to the side surface of the inner tube material in advance by various painting methods, printing, or the like, the production becomes easy.

In the wear detection method corresponding to claim 12 , a voltage is applied to a plurality of wear detection lines to detect wear or disconnection of the wear detection lines as an electrical change, so that the circumference of the worn inner pipe is around the pipe axis. It is characterized by specifying the angle range of.
According to the twelfth aspect of the present invention, it is possible to detect the angle range around the pipe axis of the portion of the inner pipe where the wear has progressed by an electric change.

In the wear detection method corresponding to the thirteenth aspect , a voltage is applied to a plurality of wear detection lines to detect wear or disconnection of the wear detection lines as an electrical change, so that the circumference of the worn inner pipe is around the pipe axis. In specifying the angle range of the above, it is characterized in that the change in the resistance value due to the decrease in the conduction area of the conductive coating film is detected to detect the wear.
According to the thirteenth aspect of the present invention, it is possible to detect the degree of progress of wear generated in the inner pipe in the depth direction. In addition, the relationship between the degree of progress of wear in the depth direction and the change in resistance value becomes proportional, facilitating detection.

In the wear detection method corresponding to claim 14 , a voltage is applied to a plurality of wear detection lines to detect wear or disconnection of the wear detection lines as an electrical change, so that the circumference of the worn inner pipe is around the pipe axis. In specifying the angle range of, the boundary region of the two angle ranges was worn by detecting the simultaneous or successive electrical changes of two wear detection lines whose angle ranges are adjacent to each other among the multiple wear detection lines. It is characterized by detecting that.
According to the present invention described in claim 14, it is possible to the vicinity of the border of the angular range around the tube axis 2 was broken in charge of the plurality of wear-detection line detects that it has locally worn.

The wear detection method according to claim 15 is characterized in that a transport pipe is used only in a place where wear of the transport system is expected.
According to the fifteenth aspect of the present invention, it is possible to specify the angle range around the pipe axis of the worn portion of the inner pipe and to specify the position range in the pipe axis direction. In addition, the total length of the transport pipe used for wear detection can be saved.

The method of operating a transport pipe according to claim 16 is characterized in that the specified angle range around the pipe axis is moved to an angle range different from the angle range.
According to the sixteenth aspect of the present invention, even if the inner pipe is locally worn due to the collision of a wearable substance, the wear caused in the inner pipe is caused by moving the worn portion to a different angle range. Can be distributed in each angle range around the tube axis. Therefore, the time required to reach the wear limit is significantly extended, and the life of the entire transport pipe can be greatly extended.

17th aspect of the present invention is characterized in that the transport pipe is rotated around a pipe axis so as to be moved to a different angle range.
According to the 17th aspect of the present invention, by rotating the transport pipe around the pipe axis and moving the worn portion to a different angle range, the wear generated in the inner pipe is caused by each angle range around the pipe axis. Can be dispersed in.

The present invention according to claim 18 is characterized in that the transport pipe is configured to have flexibility so as to be moved to a different angle range, and the transport pipe is deformed by applying an external force.
According to the eighteenth aspect of the present invention, by applying an external force to the transport pipe to deform and move the worn portion to a different angle range, the wear generated in the inner pipe is reduced to each angle range around the pipe axis. Can be dispersed.

The present invention according to claim 19 is characterized in that the external force is buoyancy by a buoyancy generating means.
According to the nineteenth aspect of the present invention, it becomes easy to apply an external force to the transport pipe by buoyancy, especially in water.

The present invention according to claim 20 is characterized in that the external force is a mechanical external force by a mechanical means including a suspension machine and a gantry.
According to the 20th aspect of the present invention, it becomes easy to apply an external force to the transport pipe by a mechanical external force.

The present invention according to claim 21 is characterized in that, when selecting different angle ranges, the selection is made in consideration of the movement history of the transport pipe.
According to the 21st aspect of the present invention, by considering the movement history, the angle range of the movement destination can be set more appropriately, and the life of the entire transport pipe can be greatly extended.

The invention according to claim 22 is characterized in that different angle ranges are set to the most effective angle range in extending the life of the transport pipe in consideration of the movement history.
According to the 22nd aspect of the present invention, the life of the entire transport pipe can be further extended.

The present invention according to claim 23 is characterized in that, when a different angle range cannot be selected even in consideration of the movement history, the original angle range is maintained.
According to the 23rd aspect of the present invention, it is possible to prevent unnecessary movement of the transport pipe.

The present invention according to claim 24 is to disperse the wear of the transport pipe and extend the time until the wear or disconnection of the wear detection line is detected. It is characterized by moving.
According to the 24th aspect of the present invention, the portion of the inner pipe located in the angle range susceptible to wear is changed every predetermined operating time, and the wear generated in the inner pipe is made uniform in each angle range around the pipe axis. It becomes easy to disperse to.

25. The present invention according to claim 25 is characterized in that the transport pipe is constantly moved at a low speed in order to disperse the wear of the transport pipe and extend the time until the wear or disconnection of the wear detection line is detected. ..
According to the 25th aspect of the present invention, it becomes easy to uniformly disperse the wear generated in the inner pipe in each angle range around the pipe axis.

The present invention according to claim 26 is characterized in that, in rotating a transport pipe around a pipe axis, the transport pipe is rotated by using a driving means including an electric motor.
According to the 26th aspect of the present invention, the rotation work of the transport pipe can be efficiently performed, and the development to automation becomes easy.

According to the 27th aspect of the present invention, the rotation angle when the transport pipe is rotated around the pipe axis is grasped by the rotation angle grasping means provided in the rotary pipe joint that enables the transport pipe to rotate around the pipe axis. It is characterized by.
According to the 27th aspect of the present invention, it becomes easy to grasp the rotation angle of the transport pipe.

The present invention according to claim 28 is characterized in that the wear limit of the transport pipe is determined and the operation of the transport pipe is stopped.
According to the 28th aspect of the present invention, the operation can be stopped, inspection, replacement of the transport pipe, and the like can be performed before a major trouble occurs.

According to the transport pipe having the wear detection function of the present invention, the angle range around the pipe axis of the portion of the transport pipe where wear has progressed can be detected by using the wear detection line. In addition, the portion of the angle range in charge of wear detection can be clearly divided for each wear detection line.

Further, according to the transport pipe having the wear detection function of the present invention, the wear detection line is formed of the conductive coating film, so that the angle range around the pipe axis of the portion of the transport pipe where the wear has progressed can be determined. It can be detected by using a wear detection line formed of a conductive coating film.

Further, when the wear detection wire is spirally wound and arranged, it becomes more difficult for the wear detection wire to break even in a place having a large curvature, and the reliability is particularly high when applied to a flexible pipe having a large bent portion. Can be enhanced .

Also, when a plurality of wear-detection lines having a common line to be connected, since it is possible to perform the conductivity test only one end of the transport tube, work efficiency is improved. Further, when the continuity inspection is performed only at the end portion, for example, it is not necessary to provide a return line for each of the plurality of wear detection lines, and the return line can be shared by the common line.

Further, when the protective layer or the reinforcing layer is provided on the outer side of the inner pipe, it is possible to further prevent the wear detection line from being broken except for the wear from the inner surface side of the inner pipe.

Further, when the protective layer or the reinforcing layer is color-coded into a plurality of colors according to the angle range around the pipe axis in which the plurality of wear detection lines are arranged, the wear detection lines are broken by color-coding. The angular range around the pipe axis including the wear position of the inner pipe detected by (non-conduction) can be easily specified by visually recognizing the corresponding color even from the outside of the transport pipe.

Further, when a plurality of wear detection lines have color coatings corresponding to a plurality of colors, the circumference of the pipe axis including the wear position of the inner pipe detected by the breakage (non-conduction) of the wear detection lines. It becomes easy to correspond with the angle range of.

In addition, when the inner pipe and the wear detection line are arranged in multiple layers so that the progress of wear in the depth direction can be detected, the progress (wear degree) of the wear generated in the inner pipe in the depth direction can be determined. Can be detected .

Also, the coated surface of the conductive coating film, when formed on the inner surface in a direction substantially perpendicular to the inner tube, on the basis of the reduction degree of the coating film surface to the inner surface in a direction substantially perpendicular to the inner tube , It is possible to detect the degree of progress of wear generated in the inner pipe in the depth direction. Further, for example, by widening the width of the coating film surface, it is possible to detect the progress of wear in the depth direction even when the wear detection layer is a single layer.

According to the method for manufacturing a transport pipe of the present invention, a transport pipe having a spirally wound wear detection line can be efficiently molded.

Further, according to the manufacturing method of the transport tube of the present invention, a conductive coating on the side surface of the inner tube material, by forming the conductive coating film by applying in accordance with the angle range around the tube axis, the wear detection line conductive The transport pipe formed by the paint can be efficiently molded. Further, since the conductive paint can be applied to the side surface of the inner tube material in advance by various painting methods, printing, or the like, the production becomes easy.

According to the wear detection method of the present invention, the angle range around the pipe axis of the portion of the inner pipe where wear has progressed can be detected by an electrical change.

Further, according to the wear detection method of the present invention, the conductive coating film by detecting a reduction by detecting and wear the change in the resistance value of the conductive area, progress in the depth direction of the wear occurring to the inner tube Can be detected. In addition, the relationship between the degree of progress of wear in the depth direction and the change in resistance value becomes proportional, facilitating detection.

Further , according to the wear detection method of the present invention, the boundary between two angle ranges is detected by simultaneously detecting two wear detection lines having adjacent angle ranges among a plurality of wear detection lines or by detecting successive electrical changes. By detecting that the area is worn, it is possible to detect that the vicinity of the boundary of the angular range around the pipe axis in charge of the two broken lines of the plurality of wear detection lines is locally worn.

Further, according to the wear detection method of the present invention, by only using the transport pipe at a location which is assumed wear transport system, as well as identify the angular range around the tube axis of the wear part of the inner tube, the tube axis The position range of the direction can be specified. In addition, the total length of the transport pipe used for wear detection can be saved.

According to the operation method of the transport pipe of the present invention, even if the inner pipe is locally worn due to the collision of a wearable substance, the wear caused by the inner pipe is caused by moving the worn portion to a different angle range. Can be distributed over each angle range around the tube axis. Therefore, the time required to reach the wear limit is significantly extended, and the life of the entire transport pipe can be greatly extended.

In addition, when the transport pipe is rotated around the pipe axis so as to move it to a different angle range, the transport pipe is rotated around the pipe axis to move the worn part to a different angle range. The wear that occurs on the tube can be distributed over each angle range around the tube axis.

Further, when the transport pipe is configured to be flexible so as to be moved to a different angle range and the transport pipe is deformed by applying an external force, the transport pipe is deformed by applying an external force and wear occurs. By moving the portions to different angular ranges, the wear generated on the inner tube can be distributed to each angular range around the tube axis.

Further, when the external force is the buoyancy caused by the buoyancy generating means, it becomes easy to apply the external force to the transport pipe by the buoyancy, especially in water.

Further, when the external force is a mechanical external force by a mechanical means including a suspension machine and a gantry, it becomes easy to apply the external force to the transport pipe by the mechanical external force.

In addition, when selecting a different angle range in consideration of the movement history of the transport pipe, the angle range of the destination is set more appropriately by considering the movement history, and the transport pipe as a whole is selected. The life of the can be greatly extended.

Further, when different angle ranges are set for the most effective angle range for extending the life of the transport pipe in consideration of the movement history, the life of the transport pipe as a whole can be further extended.

Further, if a different angle range cannot be selected even in consideration of the movement history, unnecessary movement of the transport pipe can be prevented by keeping the original angle range.

In addition, in order to disperse the wear of the transport pipe and extend the time until the wear or disconnection of the wear detection line is detected, when the transport pipe is moved by a predetermined range after a predetermined operating time has elapsed, the transport pipe is moved. By changing the portion of the inner pipe located in the wear-prone angle range every predetermined operating time, it becomes easy to uniformly disperse the wear generated in the inner pipe in each angle range around the pipe axis.

Further, in order to disperse the wear of the transport pipe and extend the time until the wear or disconnection of the wear detection line is detected, when the transport pipe is constantly moved at a low speed, the wear generated in the inner pipe is caused by the pipe shaft. It is easy to disperse evenly in each angle range around.

Further, when rotating the transport pipe around the pipe axis by using a drive means including an electric motor, the transport pipe can be efficiently rotated and the development to automation becomes easy. ..

Further, when the rotation angle when the transport pipe is rotated around the pipe axis is grasped by the rotation angle grasping means provided in the rotary pipe joint that enables the transport pipe to rotate around the pipe axis, the rotation of the transport pipe is performed. It becomes easier to grasp the angle.

Further, when the wear limit of the transport pipe is determined and the operation of the transport pipe is stopped, the operation can be stopped before a major trouble occurs, and inspection and replacement of the transport pipe can be performed.

A flowchart of an operation method according to the first embodiment of the transport pipe according to the embodiment of the present invention. Flow chart of the operation method according to the second embodiment of the transport pipe Flowchart of operation method according to the third embodiment of the transport pipe The figure which shows an example of the transport pipe rotation mechanism of the same transport pipe The figure which shows another example of the transport pipe rotation mechanism of the same transport pipe. The figure which shows still another example of the transport pipe rotation mechanism of the same transport pipe. The figure which shows an example of the transport pipe deformation mechanism of the same transport pipe Photograph of the inside of the wear-resistant hose with a spiral liner used in the verification test Close-up photo of the same spiral liner Overview photograph of the slurry circulation type wear test equipment Overview photo of the simulated ore Observation photograph of the broken part of the spiral liner The figure which shows the angular position around the pipe axis of the wear-resistant hose. Observation photograph of the broken part of the spiral liner The figure which shows the shape of the wear detection line and the common line provided in the inner pipe of the transport pipe by this embodiment. Reference diagram showing the shape of the wear detection line and common line provided on the inner pipe of the transport pipe. The figure which shows the shape and the inner pipe of the wear detection line and the common line provided in the inner pipe of the transport pipe. Reference diagram showing the shape and inner pipe of the wear detection line and common line provided on the inner pipe of the transport pipe. The figure which shows the molding method of the inner pipe of the transport pipe The figure which shows the shape of the wear detection line and the common line by the conductive coating film provided in the inner pipe of the transport pipe. The figure which shows the state which formed the two-layer wear detection layer. The figure which shows the arrangement example of the transport pipe which has the wear detection function by this embodiment. Partial transmission diagram of the transport pipe Flowchart of the conventional operation method of the transportation pipe

Hereinafter, a transport pipe having a wear detection function, a method for manufacturing the transport pipe, a wear detection method, and a method for operating the transport pipe according to the embodiment of the present invention will be described.

First, the operation method of the transport pipe according to the present embodiment will be described.
FIG. 1 is a flowchart of an operation method according to the first embodiment of the transport pipe according to the present embodiment, FIG. 2 is a flowchart of an operation method according to the second embodiment of the transport pipe, and FIG. 3 is an operation according to the third embodiment of the transport pipe. It is a flowchart of a method. Further, FIG. 24 is a flowchart of a conventional operation method of the transport pipe.

FIG. 24 is a flowchart of a conventional operation method of a transportation pipe.
Both ends of the transport pipe 10 are connected to the pipe 1 via the joint 20, and the operation is started (step 100). When the operation is started, the slurry or the wearable substance 2 flows through the inner pipe 11 of the transport pipe 10.
After step 100, the operation of the transport pipe 10 is continued (step 200).
After the operation in step 200 has elapsed for a certain period of time, it is determined whether or not the wear of the inner tube 11 has reached the limit (step 300). The wear limit is determined by performing a visual inspection, a continuity test, or the like on the inner pipe 11.
If it is determined in step 300 that the wear of the inner pipe 11 has not reached the limit, the process returns to step 200 to continue the operation.
If it is determined in step 300 that the wear of the inner pipe 11 has reached the limit, the operation of the transport pipe 10 is stopped and the transport pipe 10 is replaced (step 400).

As described above, in the conventional operation method, after the operation of the transport pipe 10 is started in step 100, the operation of the transport pipe 10 is continued in that state. Therefore, the portion of the inner pipe 11 located in the wear progress region X is always the same, and the wear damage of that portion is remarkably advanced to reach the wear limit, so that the life of the transport pipe 10 is shortened.

On the other hand, FIG. 1 is a flowchart showing the first embodiment of the operation method of the transport pipe according to the present embodiment.
Both ends of the transport pipe 10 are connected to the pipe 1 via the joint 20, and the operation is started (step 1). When the operation is started, the slurry or the wearable substance 2 flows through the inner pipe 11 of the transport pipe 10.
After step 1, the operation of the transport pipe 10 is continued (step 2).
After the operation in step 2 has elapsed a predetermined time, it is determined whether or not the wear of the inner pipe 11 has reached the limit (step 3). The wear limit is determined by performing a visual inspection, a continuity test, or the like on the inner pipe 11.
If it is determined in step 3 that the wear of the inner pipe 11 has reached the limit, the operation of the transport pipe 10 is stopped and the transport pipe 10 is replaced (step 4). This can prevent major troubles.
If it is determined in step 3 that the wear of the inner pipe 11 has not reached the limit, it is determined whether or not the transport pipe 10 has reached a predetermined operating time (step 5). The predetermined operating time is set in advance based on experience, prediction, and the like.
If it is determined in step 5 that the transport pipe 10 has not reached the predetermined operating time, the process returns to step 2 to continue the operation.
If it is determined in step 5 that the transport pipe 10 has reached a predetermined operating time, the transport pipe 10 is rotated around the pipe axis by a predetermined angle (step 6). As for the predetermined angle, experience, prediction, etc. are made so that the portion of the inner pipe 11 previously arranged in the wear progress region X moves to an angle range different from the wear progress region X due to rotation around the pipe axis. It is set in advance based on. After step 6, the process returns to step 2 to continue operation.

According to the operation method according to the first embodiment, in the portion of the inner pipe 11 located in the wear progress region X, the transport pipe 10 rotates around the pipe axis when a predetermined operating time elapses. A portion that is out of the wear progress region X and has been located outside the wear progress region X is newly located in the wear progress region X to undertake local wear.
In this way, even if the inner tube 11 is locally worn due to the collision of the wearable substance 2, the wear points are dispersed by rotating the portion of the inner tube 11 located in the wear progress region X, and the wear limit is reached. The time required to reach the above point is significantly increased, and the life (operable time) of the entire transport pipe 10 can be greatly extended.
In the first embodiment, the transport pipe 10 is discretely rotated every predetermined operating time, but a transport pipe rotation mechanism having a driving means (not shown) such as an electric motor is provided to rotate the transport pipe. The rotation speed by the mechanism may be set so that the transport pipe 10 rotates around the pipe axis by a predetermined angle every predetermined operating time, and the transport pipe 10 may be constantly rotated at a low speed during operation. By constantly rotating the transport pipe 10 at a low speed during operation, it becomes easy to uniformly disperse the wear generated in the inner pipe 11 around the pipe shaft. Further, by providing the transport pipe rotation mechanism having the drive means, the transport pipe 10 can be efficiently rotated and the development to automation becomes easy.

In the operation method according to the first embodiment, when the transport pipe 10 is configured to have flexibility like a wear-resistant hose, in step 6, instead of rotating the transport pipe 10, the transport pipe 10 is transported. By deforming the transport pipe 10 by applying an external force to the pipe 10, the portion of the inner pipe 11 previously arranged in the wear progress region X can be moved to an angle range different from the wear progress region X. ..

FIG. 2 is a flowchart showing a second embodiment of the operation method of the transport pipe according to the present embodiment.
Both ends of the transport pipe 10 are connected to the pipe 1 via the joint 20, and the operation is started (step 11). When the operation is started, the slurry or the wearable substance 2 flows through the inner pipe 11 of the transport pipe 10.
After step 11, the operation of the transport pipe 10 is continued (step 12).
After the operation in step 12 has elapsed a predetermined time, it is determined whether or not the wear of the inner pipe 11 has reached the limit (step 13). The wear limit is determined by performing a visual inspection, a continuity test, or the like on the inner pipe 11.
When it is determined in step 13 that the wear of the inner pipe 11 has reached the limit, the operation of the transport pipe 10 is stopped and the transport pipe 10 is replaced (step 14). This can prevent major troubles.
If it is determined in step 13 that the wear of the inner pipe 11 has not reached the limit, it is determined whether or not the amount of wear of the inner pipe 11 has reached a predetermined threshold value (step 15). The amount of wear of the inner tube 11 is measured by a measuring instrument or the like. A predetermined threshold value is set in advance based on experience, prediction, and the like.
If it is determined in step 15 that the amount of wear of the inner pipe 11 has not reached a predetermined threshold value, the process returns to step 12 and the operation is continued.
When it is determined in step 15 that the amount of wear of the inner pipe 11 has reached a predetermined threshold value, the angle range around the pipe axis of the worn portion is specified (step 16). The angle range is specified by performing a visual inspection, a continuity test, or the like on the inner pipe 11.
After specifying the angle range around the pipe axis of the worn portion in step 16, it is determined whether or not the operation can be continued when the transport pipe 10 is rotated around the pipe axis (step 17). This determination is made in consideration of the rotation history (movement history) of the transport pipe 10 up to that point. For example, when the transport pipe 10 has not been rotated around the pipe axis even once, the parts of the inner pipe 11 located outside the wear progress region X are hardly worn, and therefore those parts are worn. Judging that it is possible to newly position it in the progress region X and continue the operation, the transport pipe 10 is rotated around the pipe axis several times, and it is located outside the wear progress region X in the inner pipe 11. When it is detected that the amount of wear of all the existing parts has reached a predetermined threshold value, it is determined that it is impossible to newly position those parts in the wear progress region X and continue the operation.
In step 17, when it is determined that the operation can be continued when the transport pipe 10 is rotated around the pipe axis, the most effective rotation angle around the pipe axis for extending the life of the transport pipe 10 is determined. Select (step 18). The most effective rotation angle around the pipe axis is selected in consideration of the rotation history of the transport pipe 10 up to that point. For example, among the inner pipes 11, the place where the amount of wear is the smallest or the number of times of being located in the wear progress region X is the smallest is selected so as to be located in the wear progress region X after rotation.
After selecting the most effective rotation angle of the transport pipe 10 around the pipe axis in step 18, the transport pipe 10 is rotated at the selected rotation angle (step 19). As a result, the angle range around the pipe axis of the worn portion identified in step 16 moves to an angle range different from the angle range. After step 19, the process returns to step 12 to continue operation.
If it is determined in step 17 that it is impossible to continue the operation when the transport pipe 10 is rotated around the pipe axis, the operation is continued by returning to step 12 without rotating the transport pipe 10. If it is not possible to select a different angle range to move to even if the rotation history is taken into consideration, the portion of the inner pipe 11 that was located in the wear progress region X can be transported by keeping it in the original angle range. It is possible to prevent unnecessary rotation of the tube 10.
Even if the step 13 for determining whether or not the wear of the inner pipe 11 has reached the limit and the step 15 for determining whether or not the amount of wear of the inner pipe 11 has reached a predetermined threshold value are performed together. good.

According to the operation method according to the second embodiment, the angle range around the pipe axis of the portion of the inner pipe 11 that is locally worn by the collision of the wearable substance 2 and the amount of wear reaches a predetermined threshold is specified. If it is possible to rotate the transport pipe 10 around the pipe axis and continue operation, select the rotation angle of the transport pipe 10 around the pipe axis that is most effective in extending the life of the transport pipe 10. Then, the angle range around the tube axis of the portion that has reached a predetermined threshold is moved to a different angle range.
Therefore, of the inner pipe 11, the relatively healthiest portion other than the portion previously located in the wear progress region X is newly located in the wear progress region X and undertakes local wear. The time until the wear of the inner pipe 11 reaches the limit due to the local wear becomes significantly longer, and the life of the transport pipe 10 as a whole can be greatly extended.

In the operation method according to the second embodiment, when the transport pipe 10 is configured to have flexibility like a wear-resistant hose, in step 19, the transport pipe 10 is transported instead of being rotated. By deforming the transport pipe 10 by applying an external force to the pipe 10, the portion of the inner pipe 11 previously arranged in the wear progress region X can be moved to an angle range different from the wear progress region X. ..
When an external force is applied to the transport pipe 10 to deform it, in step 17, an external force is applied to the transport pipe 10 instead of determining whether or not the operation can be continued when the transport pipe 10 is rotated around the pipe axis. It is judged whether or not it is possible to continue the operation when it is deformed by adding. This determination is made in consideration of the history (movement history) of applying an external force to the transport pipe 10 up to that point. For example, if the transport pipe 10 has not been deformed by applying an external force even once, the parts of the inner pipe 11 located outside the wear progress region X are hardly worn, and therefore those parts are worn. Judging that it is possible to newly position it in the traveling region X and continue the operation, the transport pipe 10 is deformed by applying an external force several times, and it is located outside the wear progress region X in the inner pipe 11. When it is detected that the amount of wear of all the existing parts has reached a predetermined threshold value, it is determined that it is impossible to newly position those parts in the wear progress region X and continue the operation.
When the transport pipe 10 is deformed by applying an external force, in step 18, instead of selecting the most effective rotation angle around the pipe axis for extending the life of the transport pipe 10, the transport pipe 10 is deformed. Select the most effective post-deformation state to extend the life of the. The most effective post-deformation state is selected in consideration of the history of applying an external force to the transport pipe 10 up to that point. For example, the inner pipe 11 having the least amount of wear or the least number of times it is located in the wear progress region X is selected so as to be located in the wear progress region X after being deformed by an external force.

FIG. 3 is a flowchart showing a third embodiment of the operation method of the transport pipe according to the present embodiment.
Both ends of the transport pipe 10 are connected to the pipe 1 via the joint 20, and the operation is started (step 21). When the operation is started, the slurry or the wearable substance 2 flows through the inner pipe 11 of the transport pipe 10.
After step 21, the operation of the transport pipe 10 is continued (step 22).
After the operation in step 22 has elapsed for a certain period of time, it is determined whether or not the wear of the inner pipe 11 has reached the limit (step 23). The wear limit is determined by performing a visual inspection, a continuity test, or the like on the inner pipe 11.
When it is determined in step 23 that the wear of the inner pipe 11 has reached the limit, the operation of the transport pipe 10 is stopped and the transport pipe 10 is replaced (step 24). This can prevent major troubles.
If it is determined in step 23 that the wear of the inner pipe 11 has not reached the limit, it is determined whether or not the transport pipe 10 has reached a predetermined operating time (step 25). The predetermined operating time is set in advance based on experience, prediction, and the like.
If it is determined in step 25 that the predetermined operating time has not been reached, the process returns to step 22 to continue the operation.
When it is determined in step 25 that the predetermined operating time has been reached, it is determined whether or not the amount of wear of the inner pipe 11 has reached the predetermined threshold value (step 26). The amount of wear of the inner tube 11 is measured by a measuring instrument or the like. A predetermined threshold value is set in advance based on experience, prediction, and the like.
If it is determined in step 26 that the amount of wear of the inner pipe 11 has not reached a predetermined threshold value, the transport pipe 10 is rotated around the pipe axis by a predetermined angle (step 27). As for the predetermined angle, experience, prediction, etc. are made so that the portion of the inner pipe 11 previously arranged in the wear progress region X moves to an angle range different from the wear progress region X due to rotation around the pipe axis. It is set in advance based on. After step 27, the process returns to step 22 to continue operation.
When it is determined in step 26 that the amount of wear of the inner pipe 11 has reached a predetermined threshold value, the angle range around the pipe axis of the worn portion is specified (step 28). The angle range is specified by performing a visual inspection, a continuity test, or the like on the inner pipe 11.
After specifying the angle range around the pipe axis of the worn portion in step 28, it is determined whether or not the operation can be continued when the transport pipe 10 is rotated around the pipe axis (step 29). This determination is made in consideration of the rotation history (movement history) of the transport pipe 10 up to that point. For example, when the transport pipe 10 has not been rotated around the pipe axis even once, the parts of the inner pipe 11 located outside the wear progress region X are hardly worn, and therefore those parts are worn. Judging that it is possible to newly position it in the progress region X and continue the operation, the transport pipe 10 is rotated around the pipe axis several times, and it is located outside the wear progress region X in the inner pipe 11. When it is detected that the amount of wear of all the existing parts has reached a predetermined threshold value, it is determined that it is impossible to newly position those parts in the wear progress region X and continue the operation.
In step 29, when it is determined that the operation can be continued when the transport pipe 10 is rotated around the pipe axis, the most effective rotation angle around the pipe axis for extending the life of the transport pipe 10 is determined. Select (step 30). The most effective rotation angle around the pipe axis is selected in consideration of the rotation history of the transport pipe 10 up to that point. For example, among the inner pipes 11, the place where the amount of wear is the smallest or the number of times of being located in the wear progress region X is the smallest is selected so as to be located in the wear progress region X after rotation.
After selecting the most effective rotation angle of the transport pipe 10 around the pipe axis in step 30, the transport pipe 10 is rotated at the selected rotation angle (step 31). As a result, the angle range around the pipe axis of the worn portion identified in step 28 moves to an angle range different from the angle range. After step 31, the process returns to step 22 to continue operation.
If it is determined in step 29 that it is impossible to continue the operation when the transport pipe 10 is rotated around the pipe axis, the operation is continued by returning to step 22 without rotating the transport pipe 10. If it is not possible to select a different angle range to move to even if the rotation history is taken into consideration, the portion of the inner pipe 11 that was located in the wear progress region X can be transported by keeping it in the original angle range. It is possible to prevent unnecessary rotation of the tube 10.
Even if the step 23 for determining whether or not the wear of the inner pipe 11 has reached the limit and the step 26 for determining whether or not the amount of wear of the inner pipe 11 has reached a predetermined threshold value are performed together. good.

According to the operation method according to the third embodiment, in the portion of the inner pipe 11 located in the wear progress region X, the transport pipe 10 rotates around the pipe axis when a predetermined operating time elapses. A portion that is out of the wear progress region X and has been located outside the wear progress region X is newly located in the wear progress region X to undertake local wear. Further, the angular range around the pipe axis of the portion of the inner pipe 11 that is locally worn by the collision of the wearable substance 2 and the amount of wear reaches a predetermined threshold value is specified, and the transport pipe 10 is located around the pipe shaft. When it is possible to rotate and continue the operation, the rotation angle of the transport pipe 10 around the pipe axis, which is most effective in extending the life of the transport pipe 10, is selected and the predetermined threshold is reached. By moving the angle range around the pipe axis of the portion to a different angle range, the relatively healthiest portion of the inner pipe 11 other than the portion previously located in the wear progress region X is newly worn. It is located in region X and will undertake local wear.
Therefore, the time until the wear of the inner pipe 11 reaches the limit due to the local wear becomes significantly longer, and the life of the transport pipe 10 as a whole can be greatly extended.
In the third embodiment, when the amount of wear of the inner pipe 11 does not reach a predetermined threshold value, the transport pipe 10 is discretely rotated every predetermined operating time, but a driving means such as an electric motor may be used. A transport pipe rotation mechanism is provided, and the rotation speed of the transport pipe rotation mechanism is set so that the transport pipe 10 rotates around the pipe axis by a predetermined angle at a predetermined operation time. It may be rotated at a low speed. By constantly rotating the transport pipe 10 at a low speed during operation, it becomes easy to uniformly disperse the wear generated in the inner pipe 11 around the pipe shaft. Further, by providing the transport pipe rotation mechanism having the drive means, the transport pipe 10 can be efficiently rotated and the development to automation becomes easy.

In the operation method according to the third embodiment, when the transport pipe 10 is configured to have flexibility like a wear-resistant hose, the transport pipe 10 is replaced with the rotation in steps 27 and 31. By applying an external force to the transport pipe 10 to deform the transport pipe 10, the portion of the inner pipe 11 previously arranged in the wear progress region X is moved to an angle range different from the wear progress region X. You can also do it.
When an external force is applied to the transport pipe 10 to deform it, in step 29, instead of determining whether or not the operation can be continued when the transport pipe 10 is rotated around the pipe axis, the external force is applied to the transport pipe 10. It is judged whether or not it is possible to continue the operation when it is deformed by adding. This determination is made in consideration of the history (movement history) of applying an external force to the transport pipe 10 up to that point. For example, if the transport pipe 10 has not been deformed by applying an external force even once, the parts of the inner pipe 11 located outside the wear progress region X are hardly worn, and therefore those parts are worn. Judging that it is possible to newly position it in the traveling region X and continue the operation, the transport pipe 10 is deformed by applying an external force several times, and it is located outside the wear progress region X in the inner pipe 11. When it is detected that the amount of wear of all the existing parts has reached a predetermined threshold value, it is determined that it is impossible to newly position those parts in the wear progress region X and continue the operation.
Further, when the transport pipe 10 is deformed by applying an external force, in step 30, instead of selecting the most effective rotation angle around the pipe axis for extending the life of the transport pipe 10, the transport pipe 10 is deformed. Select the most effective post-deformation state to extend the life of the. The most effective post-deformation state is selected in consideration of the history of applying an external force to the transport pipe 10 up to that point. For example, the inner pipe 11 having the least amount of wear or the least number of times it is located in the wear progress region X is selected so as to be located in the wear progress region X after being deformed by an external force.
It is also possible to configure the transport pipe 10 with flexibility and move it to a different angle range by combining rotation and applying an external force.

FIG. 4 is a diagram showing an example of a transport pipe rotation mechanism that can be used in the transport pipe operation method according to the first to third embodiments described above, and FIG. 4A is a diagram showing a transport pipe having a bent portion. A state of rotating around the axis is shown, and FIG. 4 (b) shows a state of rotating a transport pipe having no bent portion around the tube axis. The transport pipe rotation mechanism is provided with a bolt-nut fastening type flange joint 20 between the transport pipe 10 and the pipe 1 connecting the transport pipe 10, and the bolt holes of the flanges to be joined are relatively around the pipe axis of the transport pipe 10. The transport pipe 10 can be rotated stepwise around the pipe axis (by an integral multiple of the angle interval of the bolt holes) by fastening bolts and nuts at appropriate intervals. This is the rotation method used in the operation method according to the third implementation of the test.
The transport pipe rotation mechanism of this example has a simple mechanism and is inexpensive. In most cases, the rotation of the transport pipe 10 can be realized with the current pipe settings.
The flange joint 20 may be left fastened and the relative angular position between the flanged metal fitting and the transport pipe 10 may be appropriately shifted.

FIG. 5 shows another example of the transport pipe rotation mechanism that can be used in the method of operating the transport pipe according to the first to third embodiments described above. The transport pipe rotation mechanism is provided with a rotary pipe joint 20 between the transport pipe 10 and the pipe 1 connecting the transport pipe 10 so that the transport pipe 10 can freely rotate around the pipe axis.
The rotary pipe joint 20 is provided with a notch at a fixed angle (for example, every 30 degrees) around the pipe axis of the transport pipe 10 or a scale indicating the rotation angle as a means for grasping the rotation angle. It becomes easy to grasp the rotation angle of the transport pipe 10 during work.
If a handle, a handle 30, or the like for rotating work is appropriately provided on the flange on the transport pipe 10 side of the rotary pipe joint 20, the transport pipe 10 can be easily rotated by the principle of leverage. When the transport pipe 10 is a flexible pipe such as a hose and is long, in order to prevent the transport pipe 10 from twisting, both ends 10a and 10b of the transport pipe 10 may be rotated simultaneously and in the same direction as shown in FIG. Desirably, if the transport pipe 10 is a highly rigid pipe such as a steel pipe, or if the transport pipe 10 is a flexible pipe but is short, only one end 10a (or the other end 10b) of the transport pipe 10 is turned. Thereby, the entire transport pipe 10 may be rotated.
According to the transport pipe rotation mechanism of this example, since the transport pipe 10 can be rotated while the piping system is in operation, the labor required for the rotation of the transport pipe 10 can be reduced and the work time can be significantly shortened.

FIG. 6 shows still another example of the transport pipe rotation mechanism that can be used in the transport pipe operation method according to the first to third embodiments described above. In the transport pipe rotation mechanism, a rotary pipe joint 20 is provided between the transport pipe 10 and the pipe 1 connecting the transport pipe 10 so that the transport pipe 10 can freely rotate around the pipe axis, and then the rotary pipe joint 20 is provided. The transport pipe side flange can be rotated by an arbitrary angle by the electric rotation mechanism 40.
Humans may manually process wear detection information, determine the rotation angle of the transport pipe, and operate the electric rotation mechanism 40. However, as shown in FIG. 6, a dedicated measurement / control device 50 is provided and a dedicated program is used. It can also be controlled by a computer. In the case of computer control, wear detection information from the transport pipe 10 and transport pipe rotation angle information from the electric rotation mechanism 40 are input to the control device 50, and the transport pipe rotation control signal to the electric rotation mechanism 40 is measured. It is an output from the control device 50. In this example, the electric rotation mechanism 40 is used for the rotation of the flange on the transport pipe side, but a rotation mechanism by an arbitrary driving force such as hydraulic pressure, water pressure, pneumatic force, or electromagnetic force can also be used.
According to the transport pipe rotation mechanism of this example, since the transport pipe 10 can be rotated while the piping system is in operation, the labor required for the rotation of the transport pipe 10 can be reduced and the work time can be significantly shortened. Further, an accurate transport pipe rotation angle can be determined based on wear detection information from the transport pipe 10, and accurate transport pipe rotation control can be performed by the electric rotation mechanism 40. In addition, computer-controlled automation is possible.

FIG. 7 shows a transport pipe deformation mechanism that can be used when the transport pipe is configured to have flexibility like a wear-resistant hose in the method of operating the transport pipe according to the first to third embodiments described above. An example is shown.
The transport pipe deformation mechanism is a buoyancy generating means 60 provided in an intermediate portion between one end 10a and the other end 10b of the transport pipe 10, and applies buoyancy as an external force to the transport pipe 10. By using the buoyancy generating means 60, it becomes easy to apply an external force particularly to the transport pipe 10 in the water. The buoyancy generating means 60 can also be used for the transport pipe 10 in the atmosphere.
The buoyancy generating means 60 has an expansion / contraction portion 61 that expands and contracts when a gas such as air or gas is taken in and out. It should be noted that the gas is taken in and out by an on / off operation from the outside.
As shown in FIG. 7A, when the expansion / contraction portion 61 is not filled with gas and is contracting, the transport pipe 10 is in a state of hanging due to its own weight and the weight of the buoyancy generating means 60. .. Further, as shown in FIG. 7B, when the expansion / contraction portion 61 is expanded by injecting gas, buoyancy is generated in the buoyancy generating means 60, and the buoyancy of the buoyancy generating means 60 is applied to the transport pipe 10 to form the transport pipe. The middle part of 10 is deformed into a lifted state.
By controlling the buoyancy acting on the buoyancy generating means 60 in this way and applying the buoyancy to the transport pipe 10 to deform it, the position of the intermediate portion of the transport pipe 10 can be turned upside down. At this time, the transport pipe 10 does not rotate around the pipe axis, and changes from the state shown in FIG. 7 (a) to the state shown in FIG. 7 (b), or from the state shown in FIG. 7 (b) to FIG. 7 (a). By deforming to the state shown, of the four bends formed between one end 10a and the other end 10b, the wear-resistant substance 2 collides with the wear-related material 2 to cause significant wear damage locally. Easy bend The outer part is swapped up and down. As a result, the portion of the inner pipe 11 previously arranged in the wear progress region X moves to an angle range different from the wear progress region X, and the transport pipe 10 is rotated 180 degrees around the pipe axis. The same effect as in the case of

The buoyancy of the buoyancy generating means 60 is controlled so that the heights of both ends 10a and 10b of the transport pipe 10 and the height of the intermediate portion are the same or arbitrary heights, and the buoyancy is applied to the transport pipe 10. As a result, the curvature of the bent portion is made gentle to reduce the wear of the inner pipe 11, and the portion of the inner pipe 11 previously arranged in the wear progress region X is set in an angle range different from the wear progress region X. You can also move it.
Further, the transport pipe deformation mechanism moves up and down by mounting a suspension machine for pulling the intermediate portion of the transport pipe 10 using a hanging tool such as a wire or an intermediate portion of the transport pipe 10 instead of the buoyancy generating means 60. It can also be configured by using a mechanical means such as a gantry. Further, for example, if the pedestal on which the intermediate portion of the transport pipe 10 is placed is configured to move not only up and down but also left and right, and the pedestal is moved in the order of bottom → left → top → right, the pedestal moves with the movement of the pedestal. Since the transport pipe 10 is deformed and the position of the intermediate portion also changes in the order of bottom → left → top → right, the portion of the inner pipe 11 arranged in the wear progress region X moves in sequence, and the transport pipe 10 is piped. The same effect as when rotated by 90 degrees around the axis can be obtained.
When the transport pipe 10 is configured to have flexibility and is moved to different angle ranges by combining rotation and applying an external force, for example, a transport pipe rotation mechanism and a transport pipe deformation mechanism are combined. Can be used. Further, it can also be realized by utilizing the rotation by rotating the flexible transport pipe 10 by the transport pipe rotation mechanism and the deformation of the transport pipe 10 due to the rotation.

Next, a verification test using the operation method of the transport pipe according to the present embodiment will be described.
In order to verify the life extension effect of the transport pipe operation method according to this embodiment, a slurry circulation type wear test using a wear-resistant hose, which is a kind of transport pipe, and a simulated ore slurry was carried out, and the above-mentioned conventional operation method ( A comparative verification of the operation method using the comparative example) and the third embodiment was performed.

The wear-resistant hose 10 used for the wear test is a commercially available industrial wear-resistant hose having an inner diameter of 76 mm and an outer diameter of 100 mm. The inner pipe 11 of the wear-resistant hose 10 is made of wear-resistant rubber, and a reinforcing fiber layer, a soft PVC reinforcing layer, and a spiral hard PVC reinforcing material are sequentially provided on the outer side thereof. Here, in order to perform comparative verification of the operation method of the transport pipe 10, it is necessary to appropriately detect whether or not the local wear of the inner pipe 11 has reached a predetermined threshold, but the inner pipe made of wear-resistant rubber is used. Since it is difficult to quantitatively detect the degree of local wear of 11 by a usual method such as visual inspection, a steel spiral liner is formed inside the inner tube 11 in advance, and this spiral liner is used. The time when the simulated ore (wearable substance 2) in the slurry is worn away and broken is judged as "the time when the local wear of the inner pipe 11 of the transport pipe 10 reaches the limit", and the spiral liner is similarly formed. The broken portion was determined to be "a portion where the local wear of the inner pipe 11 of the transport pipe 10 reached the limit".
As a method for forming the spiral liner, first, a SUS304 steel tape (cross-sectional dimensions: thickness 2 mm x width 10 mm) is spirally wound around a steel pipe having an outer diameter of 70 mm with appropriate tension applied, and the tension is maintained as it is. After inserting the tape into the inner tube 11 of the industrial wear-resistant hose 10 in a state where the tape is in close contact with the pipe, the tension at the end of the tape is released to inflate the spiral in the radial direction, and the spiral is brought into close contact with the inner tube 11 to form a spiral. Formed a liner. Here, the gap in the hose tube axial direction of the final spiral liner was about 2 mm. FIG. 8 shows an overview photograph of the inside of the wear-resistant hose 10 with a spiral liner taken in the direction of the hose tube axis from the hose end, and FIG. 9 shows a close-up photograph of the spiral liner taken using an industrial endoscope. ..

FIG. 10 is an overview photograph of the slurry circulation type wear test apparatus used in the verification test, FIG. 10 (a) is an overall view, and FIG. 10 (b) is an enlarged view of the hose wear test unit. In this device, a certain amount of simulated ore is charged from the upper part of the tank 3 filled with water to form a slurry, which is circulated in the pipe 1 by the slurry circulation pump 4, so that the wear-resistant hose 10 connected in the middle thereof. A wear test is performed. The white-painted arrow in FIG. 10 indicates the slurry circulation direction.
As shown in FIG. 10, a wear-resistant hose 10 with a spiral liner was connected to a wear-resistant hose (without liner) 1 on the upstream side via a metal fitting (joint) 20 with a flange to form a hose wear test unit α. The hose wear test unit α is provided with a curvature in consideration of the actual usage situation, and the minimum radius of curvature of the wear resistant hose 10 in the hose wear test unit α is set to 2.2 m. When connecting the wear-resistant hose 10 with a spiral liner, the end of the spiral liner is sandwiched between the inner pipe 11 and the metal fitting 20 with a flange for connection, and a tightening tool is used from the outside of the wear-resistant hose 10. The end of the spiral liner was fixed by tightening. Further, a flow meter 5 is provided on the downstream side of the wear test unit α.

FIG. 11 is an overview photograph of the simulated ore used in the demonstration test.
The simulated ore in the slurry is commercially available crushed stone with a certain grain size (product name: single grain size crushed stone S-20 (No. 5) (produced in Kasama, Ibaraki Prefecture), rock quality: hard sandstone (sedimentary rock), absolute dry density. : 2.65 g / cm ³ , average particle size: about 19 mm) was used.
The simulated ore input amount (one dose) at the time of the test was 25 kg, and fresh water was used as the transfer water. During the test, the simulated ore concentration of the slurry was about 5% (volume concentration).

In the verification test, one continuous test time was set to 1 hour in consideration of wear deterioration of the simulated ore over time. That is, after 25 kg of new simulated ore is charged and the continuous test is performed for 1 hour, all the used simulated ore is recovered, and after 25 kg of new simulated ore is charged again, the next continuous test is performed for 1 hour. The cycle was repeated until the specified wear test time was reached.

First, the test results of the conventional operation method (comparative example) will be described.
The wear-resistant hose 10 with a spiral liner was attached to the hose wear test unit α, and a slurry circulation type wear test was performed with the angle around the tube axis of the wear-resistant hose 10 fixed according to the flowchart shown in FIG.
In the flowchart shown in FIG. 24, it is determined whether or not the wear of the inner pipe 11 has reached the limit after the operation has elapsed a predetermined time (step 300), but in the wear test, the test time (operating time) is determined. At each time point after 10 hours, 16 hours, and 18 hours, the wear-resistant hose 10 was removed and an internal observation was performed to examine the state of the spiral liner. The wear test is terminated when it is finally determined that the wear of the inner tube 11 has reached the limit (in the case of this test, when the breakage of the spiral liner is confirmed), and the wear resistance is reached with the test time up to that point. It was defined as the life of the hose 10.
In the wear test based on the flowchart shown in FIG. 24, when the test time has elapsed 18 hours, the spiral liner on the vertically lower side (lower surface side) at a position 78.8 cm downstream from the hose end on the upstream side breaks. did. FIG. 11 shows an observation photograph of the broken portion of the spiral liner with an industrial endoscope.

Next, the test results of the operation method according to the third embodiment will be described.
The wear-resistant hose 10 with a spiral liner was attached to the hose wear test unit α, and a slurry circulation type wear test was performed while appropriately rotating the wear-resistant hose 10 around the pipe axis according to the flowchart shown in FIG.
In the flowchart shown in FIG. 3, it is determined whether or not the wear of the inner pipe 11 has reached the limit after the operation has elapsed a predetermined time (step 23), but in the wear test, the test time (operating time) is determined. After every 4 hours, the wear-resistant hose 10 was removed and an internal observation was performed to check the state of the spiral liner. At the same time, it was determined whether or not the amount of wear of the inner tube 11 reached a predetermined threshold value (step 26). That is, in this test, a step 23 for determining whether or not the wear of the inner tube 11 has reached the limit and a step 26 for determining whether or not the amount of wear of the inner tube 11 has reached a predetermined threshold value are put together. Carried out.

In the test of the operation method according to the third embodiment, the following method was used as a method of rotating the wear-resistant hose 10 around the pipe axis by a “predetermined angle” in step 27 of the flowchart shown in FIG.
1. 1. FIG. 13 is a diagram showing an angular position of the wear-resistant hose around the tube axis. Looking at the flanged metal fitting (joint) 20 used for connecting the pipe 1 and the wear-resistant hose 10 from the upstream side, as shown in FIG. 13, at the angle position of the bolt hole around the pipe axis of the wear-resistant hose 10. Position numbers (1) to (8) are assigned accordingly. These position numbers shall rotate together with the wear-resistant hose 10 as the wear-resistant hose 10 rotates.
2. 2. In the slurry circulation type wear test, the wear resistant hose 10 is attached so that the angle position (1) is vertically above and the angle position (2) is vertically below at the start of the test, and the test time elapses for 4 hours. So that the angle position is vertically above in the order of (3), (4), (5), (6), (7), (8), (1), (2), ... The wear-resistant hose 10 is rotated around the pipe axis.

In the test of the operation method according to the third embodiment, the rotation method was adopted in which the angle positions coming to the vertical upper side are in the above order, but in the actual operation, the magnitude of the angle range around the pipe axis of the worn part and the wear are used. Based on empirical knowledge about the location, the order of the angular positions that come to the vertical upper side may be a repetition of (1) → (2) → (3) → (4), or (1) → (2) → ( 1) → (2), (1) → (3) → (2) → (4), or (1) → (5) → (3) → (7) → (2) → (6) → (4) ) → (8), it is preferable to select the optimum rotation method according to the operating condition and the wear form of the wear-resistant hose 10, such as rotating the wear-resistant hose 10 by a certain angle.

In the test of the operation method according to the third embodiment, as steps 26 and 28 of the flowchart shown in FIG. 3, the wear-resistant hose 10 is removed and the inside is observed every 4 hours of the test time, and the inside is locally spiraled. If an abnormality such as wear, deformation, or floating of the shape liner is found, the wear-resistant hose 10 does not move to step 27 in which the wear-resistant hose 10 is rotated by a predetermined angle around the pipe axis, and the wear-resistant hose 10 including the abnormal portion is included. Whether or not the wear-resistant hose 10 can rotate around the pipe axis so that the angle range around the pipe axis of the hose is as far as possible from the position on the vertically lower side (wear progress region X where wear due to simulated ore is predicted to be the most severe). If it is determined (step 29) and it is determined that it is possible, the most effective rotation angle around the pipe axis for extending the life of the wear-resistant hose 10 is selected (step 30), and then the transport pipe 10 is selected. The rotation was performed by the rotation angle (step 31), and the operation was continued by returning to step 22.
On the other hand, if it is determined in step 29 that the test cannot be continued when the wear-resistant hose 10 is rotated around the pipe axis, the wear-resistant hose 10 is not rotated any further, and the process proceeds to step 22 as it is. It was decided to go back and continue the wear test. Finally, when it is determined in step 23 that the wear of the inner tube 11 has reached the limit (in the case of this test, when the breakage of the spiral liner is confirmed), the wear test is completed and the wear up to that point is completed. The elapsed time of the test was defined as the life of the wear resistant hose 10.

In the wear test using the operation method according to the third embodiment, the test with the angle position (7) on the vertical upper side of the wear resistant hose 10 is completed, and the wear resistant hose 10 at the time when the integrated test time reaches 28 hours. In the internal observation of, deformation and floating of the spiral liner in the angle range including the angle positions (5) and (6) were observed, but the wear-resistant hose 10 could be rotated around the pipe axis to continue the operation. It was judged that it was still possible (step 29), and it was judged that setting the angle position (8) to the vertical upper side was the most effective in extending the life of the wear resistant hose 10 (step 30), and it was judged that the wear resistance around the pipe axis was reached. The test was continued after rotating the hose 10 (step 31). After that, when the test with the angle position (8) on the vertical upper side was completed and the integrated test time reached 32 hours, the internal observation of the wear-resistant hose 10 showed the angle including the angle positions (5) and (6). In addition to the range, deformation and floating of the spiral liner were observed in other angle ranges, but it was judged that it was still possible to continue the operation by rotating the wear-resistant hose 10 around the pipe axis (step 29). It is judged that setting the angular position (1) to the vertical upper side is the most effective in extending the life of the wear-resistant hose (step 30), and the test is continued after rotating the wear-resistant hose 10 around the pipe axis. (Step 31). Then, when the integrated test time reached 36 hours, the spiral liner broke on the vertically lower side (near the angle position (2)) at a position 76.2 cm downstream from the hose end on the upstream side. FIG. 14 shows an observation photograph of the broken portion of the spiral liner with an industrial endoscope.

We compared and verified the above-mentioned conventional operation method (comparative example) and the operation method according to the third embodiment.
Table 1 shows a comparison of slurry circulation type wear test results. A comparative example tested according to an operation method of a transport pipe in which the wear-resistant hose 10 is fixed and not rotated (the flowchart shown in FIG. 24), and an operation method of a transport pipe in which the wear-resistant hose 10 is appropriately rotated around the pipe axis (FIG. 3). In the third embodiment tested according to (the flowchart shown), the wear test time until the spiral liner breaks is 18 hours in the comparative example and 36 hours in the third embodiment, and the operation of the transport pipe according to the third embodiment is performed. The method was found to extend the life of the wear resistant hose 10 to twice that of the comparative example.

Next, a transport pipe having a wear detection function, a method for manufacturing the transport pipe, and a wear detection method according to the present embodiment will be described. The transport pipe having the wear detection function according to the present embodiment and the wear detection method can be used for the operation method of the transport pipe according to the present embodiment described above.

FIG. 15 is a diagram showing the shapes of the wear detection line and the common line provided in the inner pipe of the transport pipe according to the present embodiment, and FIG. 15 (a) is a view of the wear detection line and the common line viewed in the pipe axis direction. 15 (b) is a view of the wear detection line and the common line viewed from diagonally above, FIG. 15 (c) is a view of the wear detection line and the common line in the direction orthogonal to the pipe axis, and FIG. 15 (d) is a view of wear. It is the figure which looked at the detection line and the common line diagonally from the lateral direction.
16 is a reference diagram that makes it easy to see FIG. 15, FIG. 16 (a) is a view in which FIG. 15 (c) is extended in the tube axis direction, and FIG. 16 (b) is a view in which FIG. 15 (d) is extended in the tube axis direction. FIG. 16 (c) is a view of FIG. 15 (e) extended in the pipe axis direction.
FIG. 17 is a diagram showing the shape of the wear detection line and the common line provided on the inner pipe of the transport pipe and the inner pipe, and FIG. 17 (a) shows the shape of the wear detection line and the common line and the inner pipe in the diagonal lateral direction. 17 (b) is a transparent view of the inner tube of (a).
FIG. 18 is a reference view that makes it easy to see FIG. 17, FIG. 18 (a) is a view in which FIG. 17 (a) is extended in the tube axis direction, and FIG. 18 (b) is a view in which FIG. 17 (b) is extended in the tube axis direction. It is a figure.
FIG. 19 is a diagram showing a method of molding the inner pipe of the transport pipe.

In the transport pipe 10 having the wear detection function according to the present embodiment, the wear detection lines A, B, C, D and the common line (Common) E are spirally wound around the outer circumference and the inside of the inner pipe 11. ing. The wear detection lines A to D and the common line E are conductors such as metal. The wear detection lines A to D and the common line E can also be formed of a conductive coating film. In FIGS. 15 to 18, the wear detection line A is referred to as “Line_A”, the wear detection line B is referred to as “Line_B”, the wear detection line C is referred to as “Line_C”, the wear detection line D is referred to as “Line_D”, and the common line E is referred to as “Common”. In FIGS. 17 to 18, the inner pipe 11 is displayed as "Inner_pipe".
By spirally winding the wear detection lines A to D and the common line E around the inner pipe 11 and arranging them, the wear detection lines A to D and the common line E are less likely to be disconnected even in a place where the curvature of the transport pipe 10 is large. , Especially when applied to a transport pipe 10 having a large bend, the reliability can be improved.
In addition, instead of winding in a spiral shape, it may be arranged to extend in the pipe axis direction while repeating reciprocation in the circumferential direction within a predetermined angle range.

As shown in FIG. 15, the wear detection lines A to D are arranged according to the angle range around the pipe axis. The positions where the wear detection lines A to D pass through the inside of the inner pipe 11 are different from each other, and the wear detection lines A to D are assigned every 90 degrees in the angle range around the pipe axis. That is, the wear detection lines A to D are arranged so as to pass through a position (inside) relatively close to the inner surface of the inner pipe 11 in the angle range in charge and to pass through the outer periphery of the inner pipe 11 in the angle range outside the charge. There is.
By arranging the wear detection lines A to D in this way, it is possible to clearly divide the portion of the angle range in charge of wear detection for each wear detection line A to D, and the inner pipe 11 is damaged by wear. In some cases, the angular range around the tube axis at the wear-damaged part can be specified. The common line E is wound only around the outer circumference of the inner pipe 11. In specifying the angle range around the pipe axis at the wear-damaged part, a voltage is applied to the plurality of wear detection lines A to D and the common line E, and the wear or disconnection of the wear detection lines A to D is detected as an electrical change. At this time, both the detection that one of the wear detection lines A to D is broken and the continuity is lost, and the detection that any one of the wear detection lines A to D is worn and the resistance is changed are both detected. It is possible.

Of both ends of the inner pipe 11, the wear detection lines A to D are all connected to the common line E at the other end 10b. Therefore, by inspecting the continuity between the wear detection lines A to D and the common line E at one end 10a, it is possible to detect the presence or absence of breakage of the wear detection lines A to D. That is, the inner pipe 11 is worn from the inside due to the collision of the wearable substance 2 at a certain position of the transport pipe 10, and the wear detection line A to pass through the inside of the inner pipe 11 in the angle range around the pipe axis including the wear position. When any of D is broken, the broken wear detection lines A to D are specified by the continuity inspection, and the angle range around the pipe axis in which the wear is progressing can be specified in the inner pipe 11.
Further, by having the common line E to which the plurality of wear detection lines A to D are connected, the continuity inspection can be performed only at one end 10a of the transport pipe 10, so that the work efficiency is improved. Further, when the continuity inspection is performed only at one end portion 10a, it is not necessary to provide a return line for each of the plurality of wear detection lines A to D, and the return line can be shared by the common line E.

Further, since the common wire E is wound around the outer circumference of the inner pipe 11, the wear limit of the inner pipe 11 can be detected by measuring the continuity of only the common wire E at both ends 10a and 10b of the transport pipe 10. can. That is, the time when the inner pipe 11 is worn so deep that the common line E is broken can be determined as the wear limit (unusable).

In FIG. 23A, there are a plurality of locations where local wear is expected to occur, but when the locations where local wear is expected to occur in the pipe axis direction can be narrowed down to one location, the wear detection line Two of A to D (wear detection line A and wear detection line B, wear detection line B and wear detection line C, etc.) with adjacent angle ranges around the tube axis in charge of detection broke at the same time or one after another. At this point, it is possible to detect that the vicinity of the boundary of the angular range around the tube axis in charge of the two broken lines A to D is locally worn.

Further, in the present embodiment, the four wear detection lines A to D are in charge of wear detection every 90 degrees in the angle range around the pipe axis, but the angle range in which the wear detection lines are arranged in the inner pipe 11 and It is desirable to appropriately select the number of pipes depending on the intended use and usage conditions of the transport pipe 10. For example, depending on the application and usage conditions of the transport pipe 10, two wear detection lines may be used to take charge of detection every 180 degrees in an angle range around the pipe axis, or six wear detection lines may be used to take charge of detection. It is in charge of detection every 60 degrees of the surrounding angle range.

Further, in the present embodiment, a common line E is provided so that the continuity can be inspected only from one end 10a of the transport pipe 10, but the continuity of the wear detection lines A to D can be conducted at both ends 10a of the transport pipe 10. When measuring at 10b, the common line E may be omitted.

Here, a method of manufacturing the transport pipe 10 having the wear detection function according to the present embodiment will be described.
When the rod-shaped or plate-shaped inner tube material 11A is spirally wound to form the inner tube 11 as shown in FIG. 19, one rod-shaped or plate-shaped inner tube is formed as shown in FIG. 17 (a). Four wear detection lines A to D and one common line E made of conductors such as metal are arranged so as to be applied to the material 11A, and these are integrally wound in a spiral shape to form the inner tube material 11A. The transport pipe 10 is completed by sequentially adhering the adjacent side surfaces.
According to the manufacturing method according to the present embodiment, the transport pipe 10 having the wear detection lines A to D of the five-row spiral and the inner pipe 11 with the common line E can be efficiently manufactured. When there are two wear detection lines and one common line E, it is a three-row spiral.

When the wear detection lines A to D and the common line E are formed of the conductive coating film, wear detection is performed on the side surface of one rod-shaped or plate-shaped inner tube material 11A as shown in FIG. By applying while changing the coating position according to the range (angle range around the tube axis in charge), the wear detection lines A to D and the common line E are formed as a conductive coating film, and the inside of the coating of the conductive coating film. By winding the pipe material 11A in a spiral shape and sequentially adhering the adjacent side surfaces of the inner pipe material 11A, the inner pipe 11 of the transport pipe 10, the wear detection lines A to D, and the common line E are integrally formed. be able to. In FIG. 20, the wear detection lines C and D and the inner pipe material 11A forming them are omitted in order to make the figure easier to see. The conductive paint can be applied to the side surface of the inner tube material 11A in advance by various coating methods, printing, or the like, or can be applied at the time of winding the inner tube material 11A.
Further, as shown in FIG. 20, the coating film surface of the conductive coating film is formed in a direction substantially orthogonal to the inner surface of the inner tube 11, that is, the coating film surface of the conductive coating film is in the depth direction of the inner tube 11. A conductive paint is applied so as to be formed with a predetermined width. When the inner tube 11 is thick, the conduction area of the conductive coating film gradually decreases as the wear in the wear detection range progresses in the depth direction, so that even when the wear detection layer is a single layer. By continuously measuring the resistance values of the wear detection lines A to D and detecting the change in the resistance value due to the decrease in the conduction area of the conductive coating film, the depth of wear in the wear detection range generated in the inner tube 11 The degree of progress (wear degree) in the direction can be quantitatively grasped. In addition, the relationship between the degree of progress of wear in the depth direction and the change in resistance value becomes proportional, facilitating detection.

Further, if the wear detection lines A to D wound around the outer circumference of the inner pipe 11 and the common line E are broken, the wear of the inner pipe 11 cannot be detected correctly. , It is preferable to provide a suitable protective layer or reinforcing layer.
In this case, it is preferable that the outer surface of the protective layer or the reinforcing layer is color-coded in association with the wear detection range (angle range around the pipe axis in charge) of each wear detection line A to D. By color-coding in this way, the angle range around the pipe axis including the wear position of the inner pipe 11 detected by the breakage (non-conduction) of the wear detection lines A to D can be changed to the corresponding color even from the outside of the transport pipe 10. It can be easily identified by visual inspection.
Further, although it is not always necessary to cover the wear detection lines A to D and the common line E, a protective layer or a reinforcing layer is provided, and the wear detection range of each wear detection line A to D is provided on the outer surface of the protective layer or the reinforcing layer. When color-coded in association with, it is protected to facilitate the association with the angle range around the tube axis including the wear position of the inner tube 11 detected by the breakage (non-conduction) of the wear detection lines A to D. It is preferable to cover the outer surface of the layer or the reinforcing layer with the same color as the color coding.

In this embodiment, the wear detection lines A to D and the common line E in the range outside the charge are wound around the outer periphery of the inner pipe 11, but the wear detection lines A to D and the common line in the range outside the charge are wound. Winding E so as to be embedded in a position relatively far from the inner surface of the inner pipe 11 with the wear detection lines A to D in the range in charge, that is, a position slightly inside from the outer circumference instead of the outer circumference of the inner pipe 11. By doing so, the outermost layer of the inner pipe 11 may be used as a protective layer or a reinforcing layer.

Further, in the present embodiment, as shown in FIGS. 15 and 17, four wear detection lines A to D spirally wound around the outer periphery of the inner tube 11 and the inside of the inner tube 11 and one common line. E forms a single-layer wear detection layer having a certain thickness as a whole, but the wear detection line is formed for each layer by forming a multi-layered wear detection layer such as two layers and three layers. By inspecting the continuity of A to D, it is possible to detect the degree of progress (degree of wear) of the wear generated in the inner pipe 11 in the depth direction.
Note that FIG. 21 shows a case where two wear detection layers are formed. FIG. 21 (a) is a view of the two wear detection layers viewed in the pipe axis direction, and FIG. 21 (b) is a view of the two layers of wear detection layers viewed from diagonally above.

Further, in the present embodiment, the wear of the inner pipe 11 is detected by passing the wear detection lines A to D through the position (depth) near the center of the cross section of the transport pipe 10 according to the angle range around the pipe axis. However, the wear detection lines A to D and the common line E are provided in the inner layer of the outermost layer (protective layer) of the transport pipe 10, and the wear detection lines A to D are provided in the transport pipe 10 according to the angle range around the pipe axis. By passing it through a position closer to the outer peripheral surface, it is possible to detect wear of the outermost layer that rubs against an external object or the like.

FIG. 22 is a diagram showing an arrangement example of a transport pipe having a wear detection function according to the present embodiment.
The transport pipe 10A having a wear detection function does not necessarily have to be arranged over the entire length of the transport pipe 10. It is also possible to place it only in the part where the progress of wear is expected.
By arranging the transport pipe 10A partially having a wear detection function in this way, not only the angle range around the pipe axis of the worn part of the inner pipe 11 can be specified, but also the position range in the pipe axis direction can be specified. Can be done. In addition, the total length of the transport pipe 10A used for wear detection can be saved.
When a normal transport pipe in which the wear detection lines A to D and the like are not arranged is used for the transport pipe 10B other than the portion shown by the diagonal line in FIG. 22 (transport pipe 10A having the wear detection function), the wear detection function is used. The continuity inspection of the transport pipe 10A having the above is performed individually for each location.
Further, a connecting transport pipe in which wear detection lines A to D are wound to the same depth as the common line E is provided around the transport pipe 10B other than the portion shown by the diagonal line in FIG. 22 (transport pipe 10A having a wear detection function). When used, the connecting transport pipe does not have the wear detection function of the inner pipe 11, but has the function of connecting the wear detection lines A to D and the common line E of the transport pipe 10A having the connected wear detection function. Have. In this case, the continuity inspection of the transport pipe 10A having the wear detection function can be performed on the entire transport pipe.

By applying the present invention, it is possible to detect wear of wearable substances such as powders and pellets, or transport pipes used for transporting slurries in transport pipes for transporting ores excavated on the seabed to ships on the sea and in various plants. It is possible to extend the life and work efficiency and reduce the work cost.

2 Abrasionable material 10 Transport pipe 11 Inner pipe 11A Inner pipe material 60 Buoyancy generating means A Wear detection line B Wear detection line C Wear detection line D Wear detection line E Common line

Claims (28)

A transport pipe used for transporting a slurry in which a wearable substance and a liquid are mixed or the wearable substance, in an angle range around the pipe axis, inside the inner pipe of the transport pipe, or inside the outer circumference and inside of the inner pipe. It is provided with a structure in which a plurality of wear detection lines are arranged accordingly, and the plurality of wear detection lines pass through a position relatively close to the inner surface of the inner pipe in the angle range in charge, and are relative in the angle range outside the charge. A transport pipe having a wear detection function, characterized in that it is arranged so as to pass through a position far from the inner surface of the inner pipe or the outer periphery of the inner pipe. A transport pipe used for transporting a slurry in which a wearable substance and a liquid are mixed or the wearable substance, in an angle range around the pipe axis, inside the inner pipe of the transport pipe, or inside the outer circumference and inside of the inner pipe. A transport pipe having a structure in which a plurality of wear detection lines are arranged according to the wear detection line, and having a wear detection function, wherein the wear detection lines are formed of a conductive coating film. The transport pipe having the wear detection function according to claim 1 or 2 , wherein the wear detection wire is spirally wound and arranged. The transport pipe having a wear detection function according to claim 1, wherein the transport pipe has a common line to which a plurality of the wear detection lines are connected. The transport pipe having the wear detection function according to claim 1 to claim 4, wherein a protective layer or a reinforcing layer is provided on the outer side of the inner pipe. The wear according to claim 5, wherein the protective layer or the reinforcing layer is color-coded into a plurality of colors according to the angle range around the pipe axis in which the plurality of wear detection lines are arranged. A transport pipe with a detection function. The transport pipe having a wear detection function according to claim 6, wherein the plurality of wear detection lines have a color coating corresponding to the color coding of the plurality of colors. The wear detection function according to claim 1, wherein the inner tube and the wear detection line are arranged in multiple layers so that the progress of wear in the depth direction can be detected. Transport pipe with. The transport tube having a wear detection function according to claim 2 , wherein the coating film surface of the conductive coating film is formed in a direction substantially orthogonal to the inner surface of the inner tube. The method for manufacturing a transport pipe having the wear detection function according to claim 1 to claim 9 , wherein a plurality of the wear detection lines are arranged on a rod-shaped or plate-shaped inner pipe material. A method for manufacturing a transport pipe, which comprises winding a pipe material and a plurality of the wear detection wires, and sequentially adhering adjacent side surfaces of the inner pipe material to complete the transport pipe. The method for manufacturing a transport pipe having the wear detection function according to claim 2 or 9, wherein a plurality of the wear detection lines are arranged on a rod-shaped or plate-shaped inner pipe material, and the inner pipe material and a plurality of the same. The transport pipe is completed by winding the wear detection wire and sequentially adhering the adjacent side surfaces of the inner pipe material, and conductive paint is applied to the side surfaces of the inner pipe material according to the angle range around the pipe axis. transportation pipe production method by coating you characterized in that the formation of the conductive coating Te. The wear detection method using the transport pipe having the wear detection function according to claim 1 to claim 9 , wherein a voltage is applied to a plurality of the wear detection lines to wear the wear detection lines. A wear detection method comprising detecting a broken wire as an electrical change to specify the angle range around the pipe axis of the worn inner pipe. The wear detection method using a transport pipe having a wear detection function according to claim 9, wherein a voltage is applied to a plurality of the wear detection lines to detect wear or disconnection of the wear detection lines as an electrical change. In order to specify the angle range around the tube axis of the inner tube that has been worn, the wear is detected by detecting the change in the resistance value due to the decrease in the conduction area of the conductive coating film. wear detection method that. The wear detection method using the transport pipe having the wear detection function according to claim 1 to claim 9, wherein a voltage is applied to a plurality of the wear detection lines to wear or wear the wear detection lines. In identifying the angle range around the tube axis of the inner tube that has been worn by detecting the disconnection as an electrical change, the two wears of the plurality of wear detection lines whose angle ranges are adjacent to each other. simultaneous detection line, or successive by detecting the electrical change, wear sensing how to characterized in that the boundary region between two of the angular range to detect that it has worn. The wear detection method using the transport pipe having the wear detection function according to claim 1 to claim 9 , wherein the transport pipe is used only in a place where wear of the transport system is expected. A wear detection method characterized by. A method of operating a transport pipe using the wear detection method according to claim 12 to claim 15 , wherein the specified angle range around the pipe axis is set to an angle range different from the angle range. An operation method for transport pipes, which is characterized by being moved. The method of operating a transport pipe according to claim 16 , wherein the transport pipe is rotated around a pipe axis so as to be moved to the different angle range. The method for operating a transport pipe according to claim 16 , wherein the transport pipe is configured to have flexibility so as to be moved to the different angle range, and the transport pipe is deformed by applying an external force. .. The method of operating a transport pipe according to claim 18 , wherein the external force is buoyancy by a buoyancy generating means. The method for operating a transport pipe according to claim 18 , wherein the external force is a mechanical external force by a mechanical means including a suspension machine and a gantry. It said different angular ranges when designing, selecting, and operating method of the transport tube according to one of claims 16 to claim 20, characterized in that selected in consideration of the movement history of the transport pipe. 21. The method of operating a transport pipe according to claim 21, wherein the different angle range is set to the most effective angle range for extending the life of the transport pipe in consideration of the movement history. The operation method of a transport pipe according to claim 21 , wherein if the different angle range cannot be selected even in consideration of the movement history, the angle range is kept in the original angle range. In order to disperse the wear of the transport pipe and extend the time until the wear or disconnection of the wear detection line is detected , the transport pipe is moved by a predetermined range after a predetermined operating time has elapsed. The operation method of the transport pipe according to claim 1 of claim 16 to 23. Claim 16 to claim 16, wherein the transport pipe is constantly moved at a low speed in order to disperse the wear of the transport pipe and extend the time until the wear or disconnection of the wear detection line is detected. The method of operating a transport pipe according to item 1 of 23. The transport according to claim 21 to claim 25 , which cites claim 17 , wherein the transport pipe is rotated around a pipe shaft by using a driving means including an electric motor. How to operate the pipe. 26. Operation method of the transportation pipe described in. Determining the wear limit of the transport pipe, an operation method of the transport tube according to one of claims 27 claim 16, characterized in that stopping the operation of the transport pipe.

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