JP5859283B2 - Pipe elbow bending test equipment - Google Patents

Description

  The present invention relates to a pipe elbow bending test apparatus for performing a proof test of a pipe elbow used as a pipe.

  As a conventional pipe elbow bending test apparatus, there is one described in Patent Document 1 below. The pipe elbow out-of-plane bending test apparatus described in Patent Document 1 transmits rotational force to a flange coupling base connected to both ends of the pipe elbow, so that it can freely rotate around the center of the sector shape by a bearing and a support fitting. Attach each fan-shaped moment lever to the flange coupling base, attach one end of the wire to the arc of the moment lever, connect the other end of the wire to the load-bearing fitting that acts on the tensile force, and connect the wire to the moment lever fulcrum The wire is placed parallel to the direction to be tied.

  By the way, when performing a proof test of a piping elbow, it is necessary to perform not only the out-of-plane bending test described above but also the in-plane bending test. Separate test equipment is used for out-of-plane bending loading and in-plane bending loading. In general, the pipe elbow is evaluated for yield strength by combining the stress values in each direction.

  When configuring a test apparatus that can perform an in-plane bending test and an out-of-plane bending test in this way, a hydraulic pressure that applies a bending load in the in-plane direction (longitudinal direction of the pipe elbow) to each end of the pipe elbow. In addition to providing the cylinder, a hydraulic cylinder that applies a bending load in the out-of-plane direction (the radial direction of the pipe elbow) to the bent portion of the pipe elbow is provided.

Japanese Patent Application Laid-Open No. 08-219962

  In the conventional pipe elbow bending test apparatus described above, a hydraulic cylinder that applies a bending load in the in-plane direction to each end of the pipe elbow, and a bending load that is applied in an out-of-plane direction to the bending portion of the pipe elbow. Each cylinder is arranged in a horizontal direction and in a direction orthogonal to each other. However, in such a configuration, since each hydraulic cylinder applies a load from two directions orthogonal to the pipe elbow, the shear load is superior to the bending load. It becomes difficult to accurately simulate the out-of-plane bending test. That is, since each end of the pipe elbow is supported by one hydraulic cylinder, if a bending load is applied in the out-of-plane direction to the bent part of the pipe elbow by the other hydraulic cylinder, the bending load of the bent part As a result, the shearing force acting on each end becomes dominant, and it becomes difficult to properly perform the proof stress test at the bent portion of the pipe elbow.

  This invention solves the subject mentioned above, and provides the bending test apparatus of a pipe elbow which makes it possible to obtain highly accurate test data by giving an appropriate bending load to a pipe elbow. With the goal.

  In order to achieve the above object, a pipe elbow bending test apparatus according to the present invention includes first and second supports that can respectively support ends of a pipe elbow, and the first and second supports that are rotatable. The first and second rotation support mechanisms that support the first, the second rotation support mechanism, and the rotation drive device that can operate the first and second rotation support mechanisms, and at least one of the first and second support members can be moved toward and away from each other. And a movement drive device that can operate the movement support mechanism.

  Therefore, when the movement mechanism is operated by the movement drive device, the first and second support bodies approach and separate without rotating, whereby an in-plane load can be applied to the pipe elbow, and the rotation drive device When the first and second rotation support mechanisms are operated, the first and second supports are rotated, so that an out-of-plane load can be applied to the pipe elbow. At this time, each end of the pipe elbow No shear force acts on the pipe elbow, and highly accurate test data can be obtained by applying an appropriate bending load to the pipe elbow.

  In the pipe elbow bending test apparatus according to the present invention, the rotation drive device connects a rotation drive source, a slide member that can be reciprocated by the rotation drive source, and the slide member and the first and second supports. It has the 1st and 2nd link which carries out.

  Therefore, by connecting the slide member that can be reciprocated by the drive source and the first and second supports by the first and second links, the first and second supports are moved to which position by the moving drive device. Even if it rotates, a 1st, 2nd support body can be rotated by a rotation drive device, and an appropriate out-of-plane load can be given to piping elbow.

  In the pipe elbow bending test apparatus according to the present invention, the movement support mechanism has a movable body that can be reciprocated by the movement drive device, and any one of the first and second support bodies is the first and second. The moving body is supported by one of the two-rotation support mechanisms.

  Accordingly, by supporting the rotatable first and second support bodies on a reciprocating movable body, the in-plane load can be appropriately applied to the pipe elbow when the movable body is moved by the movement driving device. Moreover, an out-of-plane load can be appropriately given with respect to a piping elbow by rotating the 1st, 2nd support body with a rotation drive device.

  In the pipe elbow bending test apparatus according to the present invention, the movement drive device includes first and second movement drive devices, and the movement support mechanism includes first and second movement support mechanisms. The second moving support mechanism includes first and second moving bodies that are reciprocally movable. The first and second moving bodies are moved by the first and second rotating support mechanisms. And a control device that synchronously drives the first and second moving drive devices is provided.

  Accordingly, by synchronously driving the first and second moving drive devices by the control device, the first and second moving bodies are reciprocated synchronously, and the piping elbows supported by the first and second support bodies are faced. In this case, the center part in the longitudinal direction of the pipe elbow does not move, and the first and second supports are rotated by the rotary drive device, so that an out-of-plane load is applied to the pipe elbow. It can be given properly.

  In the pipe elbow bending test apparatus according to the present invention, the control device moves the first and second moving bodies by the movement drive device according to the bending amount of the pipe elbow during the drive control of the rotation drive device. It is characterized by controlling.

  Therefore, when the controller applies the out-of-plane load to the pipe elbow by rotating the first and second supports by the rotation driving device, each end of the pipe elbow moves according to the bending amount. Therefore, an out-of-plane load can be appropriately applied to the pipe elbow by moving the first and second moving bodies by the movement drive device according to the bending amount of the pipe elbow.

  In the bending elbow bending test apparatus according to the present invention, the rotation driving device includes a fluid cylinder installed between the first and second supports.

  Therefore, since the rotary drive device is a fluid cylinder installed between the first and second supports, the installation area of the entire device can be reduced by arranging the fluid cylinder in the in-plane load direction. Can contribute to downsizing of the apparatus.

  In the pipe elbow bending test apparatus according to the present invention, the rotation driving device includes an interlocking mechanism for rotating the first and second support members as the first and second support members approach and leave the moving drive device. It is characterized by having.

  Accordingly, since the first and second supports rotate as the first and second supports approach and separate by the interlocking mechanism, a driving device such as a fluid pressure cylinder becomes unnecessary, and the device is simplified and reduced in cost. And an in-plane load and an out-of-plane load can be simultaneously applied to the pipe elbow.

  In the pipe elbow bending test apparatus according to the present invention, the movement support mechanism has a movable body that can be reciprocated by the movement drive device, and any one of the first and second support bodies is the first and second. It is supported by the movable body by either one of the two-rotation support mechanisms, and the interlocking mechanism has a connecting rod whose ends are rotatably connected to the first and second support bodies. .

  Therefore, by providing a connecting rod that is pivotally connected to the first and second supports as the interlocking mechanism, it is possible to suppress the complexity and cost of the device.

  According to the pipe elbow bending test apparatus of the present invention, the first and second supports that can respectively support the ends of the pipe elbow, and the first and second supports that rotatably support the first and second supports. A two-rotation support mechanism, a rotation drive device capable of operating the first and second rotation support mechanisms, a moving support mechanism that supports at least one of the first and second support members so as to be movable toward and away from the other, and movement Since a moving drive device that can operate the mechanism is provided, in-plane loads and out-of-plane loads can be applied to the pipe elbow. At this time, no shear force acts on each end of the pipe elbow. Highly accurate test data can be obtained by applying an appropriate bending load to the piping elbow.

1 is a plan view illustrating a bending test apparatus for a pipe elbow according to Embodiment 1 of the present invention. FIG. 2 is a front view illustrating a bending test apparatus for a pipe elbow according to the first embodiment. FIG. 3 is a plan view illustrating a pipe elbow bending test apparatus according to Embodiment 2 of the present invention. FIG. 4 is a front view illustrating a pipe elbow bending test apparatus according to the second embodiment. FIG. 5 is a plan view illustrating a pipe elbow bending test apparatus according to Embodiment 3 of the present invention. FIG. 6 is a front view illustrating a bending test apparatus for a pipe elbow according to the third embodiment. FIG. 7 is a plan view illustrating a pipe elbow bending test apparatus according to Embodiment 4 of the present invention. FIG. 8 is a front view illustrating a pipe elbow bending test apparatus according to a fourth embodiment. FIG. 9 is a plan view illustrating a pipe elbow bending test apparatus according to a fifth embodiment of the present invention. FIG. 10 is a front view illustrating a pipe elbow bending test apparatus according to the fifth embodiment.

  Exemplary embodiments of a bending elbow bending test apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

  FIG. 1 is a plan view showing a pipe elbow bending test apparatus according to a first embodiment of the present invention, and FIG. 2 is a front view showing the pipe elbow bending test apparatus according to the first embodiment.

  In the pipe elbow bending test apparatus of Example 1, as shown in FIGS. 1 and 2, the pipe elbow 1 has a bent portion 3 in which a middle portion in the longitudinal direction of the main body 2 is bent at approximately 90 degrees, Connecting portions (joints) 4 and 5 are provided at each end in the longitudinal direction. The pipe elbow 1 can be attached so that the connecting portions (joints) 4 and 5 can be rotated by the mounting members 6 and 7 and the horizontal mounting shafts 8 and 9.

  The pipe elbow bending test apparatus according to the first embodiment includes first and second support plates (support bodies) 11 and 12, first and second bearings (rotation support mechanisms) 13 and 14, a rotation driving device 15, The first and second movement support mechanisms 16 and 17 and the first and second movement drive devices 18 and 19 are configured.

  A support plate 22 is fixed to the upper surface of the base 21, and a pair of left and right guide rails 23 and 24 are fixed on the support plate 22. Each of the guide rails 23 and 24 is composed of two parallel rail members. The first and second moving plates (moving bodies) 25 and 26 are movably supported by the guide rails 23 and 24 by guide members 27 and 28. In this case, since the guide rails 23 and 24 are arranged in a straight line on the support plate 22, the first and second moving plates 25 and 26 are also supported so as to be movable in a straight line. Here, the first and second moving support mechanisms 16 and 17 are constituted by the guide rails 23 and 24, the first and second moving plates 25 and 26, the guide members 27 and 28, and the like.

  The first and second movable drive devices 18 and 19 have first and second hydraulic cylinders 31 and 32, and the first and second hydraulic cylinders 31 and 32 have base ends fixed on the base 21, respectively. The mounting brackets 33 and 34 are connected by connecting shafts 35 and 36 along the vertical direction. The first and second hydraulic cylinders 31 and 32 have first and second drive rods 37 and 38 extending toward the first and second moving plates 25 and 26, respectively. The parts are connected to the attachment parts 25a, 26a of the first and second moving plates 25, 26 by connecting shafts 39, 40 along the vertical direction. In this case, the first and second hydraulic cylinders 31 and 32 are arranged in a straight line.

  Therefore, when the first and second hydraulic cylinders 31 and 32 in the first and second moving drive devices 18 and 19 are expanded and contracted, the first and second moving plates 25 and 26 can be reciprocated. When the first and second hydraulic cylinders 31 and 32 are extended and contracted in synchronization, the first and second moving plates 25 and 26 can be moved closer to and away from each other.

  The first and second support plates 11 and 12 are supported on the first and second moving plates 25 and 26 by the first and second bearings 13 and 14 so as to be rotatable in the horizontal direction. The pipe elbow 1 can be rotatably attached to the connecting portions 4 and 5 at the respective end portions with the mounting shafts 8 and 9 by the mounting members 6 and 7 in a standing state.

  The rotation drive device 15 has a hydraulic cylinder 41, and the hydraulic cylinder 41 is connected to each mounting bracket 42 whose base end portion is fixed on the base 21 by a connecting shaft 43 along the vertical direction. In addition, the base plate 21 has a support plate 44 fixed to the upper surface along a direction orthogonal to the middle portion of the support plate 22 in the longitudinal direction. The support plate 44 has a guide rail 45 fixed thereto, and the guide rail 45 is constituted by two parallel rail members. The slide member 46 is supported by the guide rail 47 so as to be movable. In this case, since the guide rail 45 is disposed on the support plate 44 along the horizontal direction orthogonal to the guide rails 23 and 24 in the first and second movement support mechanisms 16 and 17, the slide member 46 is also used. The first and second moving plates 25 and 26 are supported so as to be movable in a direction orthogonal to the moving direction. The hydraulic cylinder 41 has a drive rod 48 extending toward the slide member 46, and the drive rod 48 is connected to the slide member 46 by a connecting shaft 49 at the tip. In this case, the hydraulic cylinder 41 is disposed along a direction orthogonal to the first and second hydraulic cylinders 31 and 32.

  The first and second links 50 and 51 are arranged substantially in parallel, and one end portion is rotatably connected to the slide member 46 by connecting shafts 52 and 53 along the vertical direction, and the other end portion is connected. The first and second support plates 11 and 12 are connected to the attachment portions 11a and 12a by connecting shafts 54 and 55 along the vertical direction. In this case, the first and second links 50 and 51 each form a pair of upper and lower pairs, one end is connected to the upper and lower sides of the slide member 46, and the other end is the first and second support plates 11 and 12. It is connected to the upper and lower sides of the mounting portions 11a, 12a. Here, the rotary drive device 15 is configured by the hydraulic cylinder 41, the guide rail 45, the slide member 46, the guide member 47, the first and second links 50, 51, and the like.

  Therefore, when the hydraulic cylinder 41 in the rotary drive device 15 is expanded and contracted, the slide member 46 can be reciprocated. When the slide member 46 is reciprocated, the first and second links 50 and 51 are used for the first, The second support plates 11 and 12 can be reciprocated.

  The control device 61 can control a hydraulic supply / discharge device (for example, a switching valve) 62, and the hydraulic supply / discharge device 62 supplies hydraulic pressure between the hydraulic source 63 and the hydraulic cylinders 31, 32, 41.・ Can be discharged. That is, the control device 61 can supply / discharge hydraulic pressure to / from the hydraulic cylinders 31, 32, 41 via the hydraulic supply / exhaust device 62 in accordance with a command from the operator, and execute the expansion / contraction drive.

  Specifically, the control device 61 extends and contracts the first and second hydraulic cylinders 31 and 32 by supplying and discharging hydraulic pressure to and from the first and second hydraulic cylinders 31 and 32 by the hydraulic supply and discharge device 62. The first and second moving plates 25 and 26 (first and second support plates 11 and 12) can be moved closer to and away from each other. Further, the control device 61 extends and contracts the hydraulic cylinder 41 by supplying and discharging hydraulic pressure to and from the hydraulic cylinder 41 by the hydraulic supply / discharge device 62, and reciprocates the first and second support plates 11 and 12. Can do.

  At this time, when supplying / discharging hydraulic pressure to / from the hydraulic cylinder 41 by the hydraulic supply / discharge device 62, the control device 61 uses the hydraulic supply / discharge device 62 to change the first and second hydraulic cylinders 31, The hydraulic pressure is supplied to and discharged from 32, and the movement amounts of the first and second moving plates 25 and 26 are controlled.

  Here, the yield strength test method for the pipe elbow 1 using the pipe elbow bending test apparatus of the first embodiment will be described.

  In the proof test of the pipe elbow 1 by the pipe elbow bending test apparatus of the first embodiment, first, the pipe elbow 1 is in the upright state, and the connecting portions 4 and 5 are respectively supported by the first and second support members 6 and 7 respectively. Fixed to the plates 11 and 12 and supported. Next, in this state, the control device 61 controls the hydraulic supply / discharge device 62 to supply / discharge hydraulic pressure from the hydraulic source 63 to the first and second hydraulic cylinders 31 and 32. 1. The second hydraulic cylinders 31 and 32 are extended and contracted. Then, the expansion / contraction driving force of the first and second hydraulic cylinders 31 and 32 is transmitted to the first and second moving plates 25 and 26, and the first and second moving plates 25 and 26 are synchronously reciprocated (approached). Leave). Therefore, since the first and second support plates 11 and 12 are supported by the first and second moving plates 25 and 26, the first and second support plates 11 and 12 are similarly reciprocated (approached and separated). , 12, an in-plane load (the load in the left-right direction in FIGS. 1 and 2) can be applied to the pipe elbow 1 whose ends are supported.

  Further, the control device 61 controls the hydraulic supply / discharge device 62 to supply and discharge hydraulic pressure from the hydraulic source 63 to the hydraulic cylinder 41, thereby driving the hydraulic cylinder 41 to extend and contract. Then, the expansion / contraction driving force of the hydraulic cylinder 41 is transmitted to the first and second support plates 11 and 12 via the slide member 46 and the first and second links 50 and 51, and the first and second support plates 11 and 12 are transmitted. 12 reciprocally rotates synchronously. Therefore, an out-of-plane load (a vertical load in FIG. 1) can be applied to the pipe elbow 1 whose ends are supported by the first and second support plates 11 and 12.

  When an in-plane load is applied to the pipe elbow 1 supported by the first and second moving plates 25 and 26 (first and second support plates 11 and 12), the ends of the pipe elbow 1 are separated from each other. Therefore, the central part in the longitudinal direction hardly moves. On the other hand, when an out-of-plane load is applied to the pipe elbow 1 by reciprocatingly rotating the first and second support plates 11 and 12, the pipe elbow 1 is bent and deformed in the out-of-plane direction, so that the total length varies. Then, each end portion moves in the longitudinal direction (in-plane direction) with the central portion in the longitudinal direction as a fulcrum. Therefore, the control device 61 supplies and discharges hydraulic pressure to and from the hydraulic cylinder 41 by the hydraulic supply / discharge device 62 to apply an out-of-plane load to the pipe elbow 1, according to the bending amount of the pipe elbow 1. Thus, the hydraulic pressure is supplied to and discharged from the first and second hydraulic cylinders 31 and 32, and the first and second moving plates 25 and 26 are reciprocated.

  Since the amount of movement of the first and second moving plates 25 and 26 at this time depends on the amount of bending of the pipe elbow 1, the shape and dimensions of the pipe elbow 1, the first and second support plates 11, 12 may be set in advance according to the amount of rotation (rotation angle) of 12, or the amount of bending of the pipe elbow 1 or the amount of rotation of the first and second support plates 11, 12 may be measured and set. Good.

  The application of the in-plane load and the out-of-plane load to the pipe elbow 1 can be performed in order and simultaneously. Therefore, the yield strength test of the pipe elbow 1 using the pipe elbow bending test apparatus of Example 1 can be performed in a short time.

  Then, in the proof test of the pipe elbow 1, after applying an in-plane load and an out-of-plane load to the pipe elbow 1 over a predetermined period, the durability of the pipe elbow 1 is inspected. To evaluate.

  As described above, in the pipe elbow bending test apparatus according to the first embodiment, the first and second support plates 11 and 12 and the first and second support plates 11 capable of supporting the ends of the pipe elbow 1, respectively. , 12 that rotatably support the first and second bearings 13 and 14, and the rotary drive device 15 that rotates the first and second support plates 11 and 12 via the first and second bearings 13 and 14, respectively. The first and second movable support mechanisms 16 and 17 that support the first and second support plates 11 and 12 so as to be able to approach and separate from each other, and the first and second movable support mechanisms 16 and 17 that can be operated. Mobile drive units 18 and 19 are provided.

  Accordingly, when the first and second movement support mechanisms 16 and 17 are actuated by the first and second movement driving devices 18 and 19, the first and second support plates 11 and 12 are moved away from each other without rotating. An in-plane load can be applied to the pipe elbow 1. Further, when the first and second support plates 11 and 12 are rotated by the rotary drive device 15 via the first and second bearings 13 and 14, an out-of-plane load can be applied to the pipe elbow 1. When an out-of-plane load is applied to the pipe elbow 1, each end of the pipe elbow 1 rotates, so that no shearing force acts on the pipe elbow 1, and an appropriate bending is applied to the pipe elbow 1. Highly accurate test data can be obtained by applying a load. Also, when applying an in-plane load to the pipe elbow 1, the pipe elbow 1 rotates with the end shafts 8 and 9 as fulcrums, so that no shearing force acts on it. Highly accurate test data can be obtained by applying an appropriate bending load to the pipe elbow 1.

  In the pipe elbow bending test apparatus according to the first embodiment, the rotation drive device 15 includes a hydraulic cylinder 41, a slide member 46 that can be reciprocated by the hydraulic cylinder 41, the slide member 46, and the first and second support plates 11. , 12 are provided with first and second links 50, 51. Therefore, by connecting the slide member 46 and the first and second support plates 11 and 12 by the first and second links 50 and 51, the first and second movement driving devices 18 and 19 make the first and second movements. Regardless of the position of the support plates 11 and 12, the first and second support plates 11 and 12 are appropriately rotated by the hydraulic cylinder 41 to apply an appropriate out-of-plane load to the pipe elbow 1. Can do.

  In the pipe elbow bending test apparatus according to the first embodiment, the first and second moving plates 25 and 26 are provided as the first and second moving support mechanisms 16 and 17, and the first and second support plates 11 and 12 are provided. Are supported by the first and second bearings 13 and 14 on the second moving plates 25 and 56 in a rotatable manner. Therefore, when the first and second movable plates 25 and 26 are moved by supporting the rotatable first and second movable plates 11 and 12 on the first and second movable plates 25 and 26 that are reciprocally movable, An in-plane load can be appropriately applied to the pipe elbow 1, and when the first and second support plates 11, 12 are rotated, an out-of-plane load can be appropriately applied to the pipe elbow 1. it can.

  Further, in the pipe elbow bending test apparatus according to the first embodiment, a control device 61 that synchronously drives the first and second movement drive devices 18 and 19 is provided. Accordingly, the first and second moving drive devices 18 and 19 are synchronously driven by the control device 61, so that the first and second moving plates 25 and 26 are synchronously reciprocated, and the first and second support plates 11 are moved. , 12, an in-plane load is applied to the pipe elbow 1. At this time, the central portion in the longitudinal direction of the pipe elbow 1 does not move, and the first and second support plates are rotated by the rotary drive device 15. By rotating 11 and 12, an out-of-plane load can be appropriately applied to the pipe elbow 1.

  Further, in the pipe elbow bending test apparatus according to the first embodiment, the control device 61 performs the first and second movement drive devices 18 and 19 according to the bending amount of the pipe elbow 1 during the drive control of the rotary drive device 15. 1. The amount of movement of the second moving plates 25 and 26 is controlled. When the control device 61 rotates the first and second support plates 11 and 12 to apply an out-of-plane load to the pipe elbow 1, each end of the pipe elbow 1 moves according to the amount of bending. From the above, by moving the first and second moving plates 25 and 26 by the first and second movement driving devices 18 and 19 according to the bending amount of the pipe elbow 1, an out-of-plane load is appropriately applied to the pipe elbow 1. can do.

  FIG. 3 is a plan view showing a pipe elbow bending test apparatus according to a second embodiment of the present invention, and FIG. 4 is a front view showing the pipe elbow bending test apparatus according to the second embodiment. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the pipe elbow bending test apparatus of Example 2, as shown in FIGS. 3 and 4, the pipe elbow 1 has a bent portion 3 in which the intermediate portion in the longitudinal direction of the main body 2 is bent at approximately 90 degrees, Connecting portions (joints) 4 and 5 are provided at each end in the longitudinal direction. The pipe elbow 1 can be attached so that the connecting portions (joints) 4 and 5 can be rotated by the mounting members 6 and 7 and the horizontal mounting shafts 8 and 9.

  The pipe elbow bending test apparatus according to the second embodiment includes first and second support plates (support bodies) 111 and 112, first and second bearings (rotation support mechanisms) 113 and 114, a rotation drive device 115, The moving support mechanism 116 and a moving drive device 117 are included.

  The base 121 has first and second support plates 122 and 123 fixed to the upper surface, and the second support plate 123 is formed higher than the first support plate 122. A guide rail 124 is fixed to the upper surface of the first support plate 122, and the guide rail 124 is composed of two parallel rail members. The moving plate (moving body) 125 is movably supported by the guide rail 124 by the guide member 126. Here, the movement support mechanism 116 is constituted by the guide rail 124, the moving plate 125, the guide member 126, and the like.

  The movement drive device 117 includes a hydraulic cylinder 131, and the hydraulic cylinder 131 is connected to a mounting bracket 132 whose base end is fixed on the base 121 by a connecting shaft 133 extending in the horizontal direction. The hydraulic cylinder 131 has a drive rod 134 that extends toward the moving plate 125, and the driving rod 134 is connected to the moving plate 125 by a connecting shaft 135 that extends in the horizontal direction.

  Therefore, when the hydraulic cylinder 131 in the movement drive device 117 is expanded and contracted, the moving plate 125 can be reciprocated.

  The first and second support plates 111 and 112 are supported on the moving plate 125 and the second support plate 123 by the first and second bearings 113 and 114 so as to be rotatable in the horizontal direction. The pipe elbow 1 can be rotatably attached to the connecting portions 4 and 5 at the respective end portions with the mounting shafts 8 and 9 by the mounting members 6 and 7 in a standing state.

  The rotation drive device 115 has a hydraulic cylinder 141, and the hydraulic cylinder 141 is connected to each mounting bracket 142 whose base end is fixed on the base 121. The hydraulic cylinder 141 has a drive rod 143 extending toward the first and second support plates 111 and 112, and the drive rod 143 is connected to a connecting member 144 at the tip. In this case, the hydraulic cylinder 141 is disposed along a direction orthogonal to the hydraulic cylinder 131.

  The slide member 145 extends between the first and second support plates 111 and 112 from the hydraulic cylinder 141 side, and is disposed along a horizontal direction orthogonal to the guide rail 124. The first and second links 146 and 147 are arranged substantially in parallel, and one end thereof is rotatably connected to the connecting member 144 by connecting shafts 148 and 149 along the vertical direction, and the other end is a slide member. The base end portion of 145 is rotatably connected by connecting shafts 150 and 151 along the vertical direction. In addition, the third and fourth links 152 and 153 are arranged in an inverted C shape, and one end thereof is rotatable by connecting shafts 154 and 155 along the vertical direction to the other end of the slide member 145. The other end is connected to the first and second support plates 111 and 112 by connecting shafts 156 and 157 along the vertical direction. In this case, the links 146, 147, 152, and 153 form a pair of upper and lower pairs, and end portions are connected to the upper and lower sides of the connecting member 144, the slide member 145, and the support plates 111 and 112. Here, the rotary drive device 115 is constituted by the hydraulic cylinder 141, the first and second links 146 and 147, the slide member 145, the third and fourth links 152 and 153, and the like.

  Therefore, when the hydraulic cylinder 141 in the rotation drive device 115 is expanded and contracted, the connecting member 144 reciprocates, and the slide member 145 reciprocates via the first and second links 146 and 147, and the third and fourth. The first and second support plates 111 and 112 can be reciprocally rotated via the links 152 and 153.

  The control device 61 can control a hydraulic supply / discharge device (for example, a switching valve) 62. The hydraulic supply / discharge device 62 supplies and discharges hydraulic pressure between the hydraulic source 63 and the hydraulic cylinders 131 and 141. It can be performed. That is, the control device 61 can supply / discharge hydraulic pressure to / from the hydraulic cylinders 131 and 141 via the hydraulic supply / exhaust device 62 according to a command from the operator, and execute the expansion / contraction drive.

  Specifically, the control device 61 supplies / discharges hydraulic pressure to / from the hydraulic cylinder 131 by the hydraulic supply / discharge device 62, thereby expanding / contracting the hydraulic cylinder 131, reciprocating the moving plate 125, and the first and second supports. The plates 111 and 112 can be moved closer to and away from each other. Further, the control device 61 extends and contracts the hydraulic cylinder 141 by supplying and discharging hydraulic pressure to and from the hydraulic cylinder 141 by the hydraulic supply / discharge device 62, and reciprocally rotates the first and second support plates 111 and 112. Can do.

  At this time, when the hydraulic supply / discharge device 62 supplies / discharges hydraulic pressure to / from the hydraulic cylinder 141, the control device 61 supplies / discharges the hydraulic cylinder 131 by the hydraulic supply / discharge device 62 according to the bending amount of the pipe elbow 1, The moving amount of the moving plate 125 is controlled.

  Here, the yield strength test method for the pipe elbow 1 using the pipe elbow bending test apparatus of the second embodiment will be described.

  In the strength test of the pipe elbow 1 using the pipe elbow bending test apparatus according to the second embodiment, first, the connecting portions 4 and 5 are respectively supported by the first and second support members 6 and 7 with the mounting members 6 and 7 in the state where the pipe elbow 1 is raised. It fixes and supports to the board 111,112. Next, in this state, the control device 61 controls the hydraulic supply / discharge device 62 to supply and discharge hydraulic pressure from the hydraulic source 63 to the hydraulic cylinder 131, thereby driving the hydraulic cylinder 131 to extend and contract. Then, the expansion / contraction driving force of the hydraulic cylinder 131 is transmitted to the moving plate 125, and the moving plate 125 reciprocates. Therefore, since the first support plate 111 is supported by the moving plate 125, it similarly reciprocates. As a result, the first and second support plates 111 and 112 approach and separate from each other, and an in-plane load is applied to the pipe elbow 1 whose ends are supported by the first and second support plates 111 and 112 (see FIG. 3 and 4, a load in the left-right direction) can be applied.

  Further, the control device 61 controls the hydraulic supply / discharge device 62 to supply and discharge hydraulic pressure from the hydraulic source 63 to the hydraulic cylinder 141, thereby driving the hydraulic cylinder 141 to extend and contract. Then, the expansion and contraction driving force of the hydraulic cylinder 141 is transmitted to the slide member 145 via the first and second links 146 and 147, and the first and second support plates 111, 111 are transmitted via the third and fourth links 152 and 153. 112, the first and second support plates 111 and 112 reciprocally rotate in synchronization. Therefore, an out-of-plane load (a vertical load in FIG. 3) can be applied to the pipe elbow 1 whose ends are supported by the first and second support plates 111 and 112.

  When an in-plane load is applied to the pipe elbow 1 supported by the first and second support plates 111 and 112, only the moving plate 125 (first support plate 111) is reciprocated. , The center portion in the longitudinal direction reciprocates with the end portion supported by the second support plate 112 as a base point. On the other hand, when the first and second support plates 111 and 112 are reciprocally rotated to apply an out-of-plane load to the pipe elbow 1, only the first support plate 111 (moving plate 125) is reciprocatingly moved. The two sets of links 146 and 147 and the links 152 and 153 absorb the deviation amount. At this time, since the pipe elbow 1 is bent and deformed in the out-of-plane direction, the entire length varies and one end moves in the longitudinal direction (in-plane direction). Therefore, the control device 61 supplies and discharges hydraulic pressure to the hydraulic cylinder 141 by the hydraulic supply / discharge device 62 to apply an out-of-plane load to the pipe elbow 1, according to the bending amount of the pipe elbow 1. Thus, hydraulic pressure is supplied to and discharged from the hydraulic cylinder 131, and the moving plate 125 is reciprocated.

  The application of the in-plane load and the out-of-plane load to the pipe elbow 1 can be performed in order and simultaneously. Therefore, the yield strength test of the pipe elbow 1 using the pipe elbow bending test apparatus of Example 1 can be performed in a short time.

  Then, in the proof test of the pipe elbow 1, after applying an in-plane load and an out-of-plane load to the pipe elbow 1 over a predetermined period, the durability of the pipe elbow 1 is inspected. To evaluate.

  As described above, in the pipe elbow bending test apparatus according to the second embodiment, the first and second support plates 111 and 112 and the first and second support plates 111 capable of supporting each end of the pipe elbow 1 are provided. , 112 for rotatably supporting the first and second bearings 113, 114, and a rotary driving device 115 for rotating the first and second support plates 111, 112 via the first and second bearings 113, 114, A movement support mechanism 116 that supports the first support plate 111 so as to be able to approach and move apart and a movement drive device 117 that can operate the movement support mechanism 116 are provided.

  Therefore, when the movement support mechanism 116 is operated by the movement drive device 117, the first support plate 111 reciprocates without rotating, so that an in-plane load can be applied to the pipe elbow 1. Further, when the first and second support plates 111 and 112 are rotated by the rotation driving device 115 via the first and second bearings 113 and 114, an out-of-plane load can be applied to the pipe elbow 1. When an out-of-plane load is applied to the pipe elbow 1, each end of the pipe elbow 1 rotates, so that no shearing force acts on the pipe elbow 1, and an appropriate bending is applied to the pipe elbow 1. Highly accurate test data can be obtained by applying a load.

  In the bending elbow bending test apparatus according to the second embodiment, as the rotation driving device 115, a hydraulic cylinder 141, a connecting member 144 that can be reciprocated by the hydraulic cylinder 141, first and second links 146 and 147, a slide A member 145 and third and fourth links 152 and 153 are provided. Therefore, by providing two sets of links 146 and 147 and links 152 and 153 before and after the slide member 145, the first and second support plates are moved by the hydraulic cylinder 141 regardless of the position of the first support plate 111. 111 and 112 can be appropriately rotated, and an appropriate out-of-plane load can be applied to the pipe elbow 1.

  FIG. 5 is a plan view illustrating a pipe elbow bending test apparatus according to a third embodiment of the present invention, and FIG. 6 is a front view illustrating the pipe elbow bending test apparatus according to the third embodiment. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the pipe elbow bending test apparatus of Example 3, as shown in FIGS. 5 and 6, the pipe elbow 1 has a bent portion 3 in which the intermediate portion in the longitudinal direction of the main body 2 is bent at approximately 90 degrees, Connecting portions (joints) 4 and 5 are provided at each end in the longitudinal direction. The pipe elbow 1 can be attached so that the connecting portions (joints) 4 and 5 can be rotated by the mounting members 6 and 7 and the horizontal mounting shafts 8 and 9.

  The pipe elbow bending test apparatus according to the third embodiment includes first and second support plates (supports) 211 and 212, first and second bearings (rotation support mechanisms) 213 and 214, a rotation drive device 215, The moving support mechanism 216 and the moving drive device 217 are configured.

  A guide rail 222 is fixed to the upper surface of the base 221, and the guide rail 222 is constituted by two parallel rail members. The moving plate (moving body) 223 is supported by the guide rail 222 so as to be movable by the guide member 224. Here, a moving support mechanism 216 is configured by the guide rail 222, the moving plate 223, the guide member 224, and the like.

  The movement drive device 217 has a hydraulic cylinder 231, and the hydraulic cylinder 231 is connected to a mounting bracket 232 whose base end is fixed on the base 221. The hydraulic cylinder 231 has a drive rod 233 extending toward the moving plate 223, and the driving rod 233 is connected to the moving plate 223 by a connecting shaft 234 along the vertical direction.

  Therefore, when the hydraulic cylinder 231 in the movement driving device 217 is expanded and contracted, the moving plate 223 can be reciprocated.

  The first and second support plates 211 and 212 are supported by the first and second bearings 213 and 214 on the moving plate 223 and the support plate 225 fixed to the base 221 so as to be rotatable in the horizontal direction. The pipe elbow 1 can be rotatably attached to the connecting portions 4 and 5 at the respective end portions with the mounting shafts 8 and 9 by the mounting members 6 and 7 in a standing state.

  The rotation drive device 215 has a hydraulic cylinder 241, and this hydraulic cylinder 241 is installed between the first and second support plates 211 and 212. In this case, the hydraulic cylinder 241 is disposed along a direction parallel to the hydraulic cylinder 231. That is, the hydraulic cylinder 241 is attached to the base end portion, and the attachment bracket 242 is connected to the attachment portion 211a of the first support plate 211 by the connection shaft 243 along the vertical direction. The hydraulic cylinder 241 has a drive rod 244 extending toward the second support plate 212, and the drive rod 244 is connected to a connection bracket 245 at the tip, and the connection bracket 245 is attached to the second support plate 212. It is connected to the part 212a by a connecting shaft 246 along the vertical direction. Here, the rotation driving device 215 is configured by the hydraulic cylinder 241, the mounting bracket 242, the connection bracket 245, and the like.

  Therefore, when the hydraulic cylinder 241 in the rotation drive device 215 is expanded and contracted, the first and second support plates 211 and 212 can be reciprocally rotated via the mounting portions 211a and 212a.

  The control device 61 can control a hydraulic supply / discharge device (for example, a switching valve) 62. The hydraulic supply / discharge device 62 supplies and discharges hydraulic pressure between the hydraulic source 63 and the hydraulic cylinders 231 and 241. It can be performed. That is, the control device 61 can supply / discharge hydraulic pressure to / from the hydraulic cylinders 231 and 241 via the hydraulic supply / exhaust device 62 according to a command from the operator, and execute the expansion / contraction drive.

  Specifically, the control device 61 supplies / discharges hydraulic pressure to / from the hydraulic cylinder 231 by the hydraulic supply / discharge device 62, thereby expanding / contracting the hydraulic cylinder 231 and reciprocating the moving plate 223 to provide first and second support. The plates 211 and 212 can be moved closer to and away from each other. Further, the control device 61 extends and contracts the hydraulic cylinder 241 by supplying and discharging hydraulic pressure to and from the hydraulic cylinder 241 by the hydraulic supply / discharge device 62 and reciprocally rotates the first and second support plates 211 and 212. Can

  At this time, when the hydraulic supply / discharge device 62 supplies / discharges hydraulic pressure to / from the hydraulic cylinder 231, the control device 61 supplies / discharges the same amount of hydraulic pressure to / from the hydraulic cylinder 241, and the first and second support plates 211, 212 rotate. There is no control. The control device 61 supplies and discharges hydraulic pressure to and from the hydraulic cylinder 231 by the hydraulic supply and discharge device 62 according to the bending amount of the pipe elbow 1 when supplying and discharging hydraulic pressure to and from the hydraulic cylinder 241 by the hydraulic supply and discharge device 62. The amount of movement of the moving plate 223 is controlled.

  Here, the yield strength test method for the pipe elbow 1 using the pipe elbow bending test apparatus of Example 3 will be described.

  In the strength test of the pipe elbow 1 using the pipe elbow bending test apparatus according to the third embodiment, first, with the pipe elbow 1 standing, the connecting portions 4 and 5 are respectively supported by the first and second support members 6 and 7, respectively. It is fixed to the plates 211 and 212 and supported. Next, in this state, the control device 61 controls the hydraulic supply / discharge device 62 to supply and discharge hydraulic pressure from the hydraulic source 63 to the hydraulic cylinder 231 to drive the hydraulic cylinder 231 to extend and contract. Then, the expansion / contraction driving force of the hydraulic cylinder 231 is transmitted to the moving plate 223, and the moving plate 223 reciprocates. Therefore, since the first support plate 211 is supported by the moving plate 223, it similarly reciprocates. As a result, the first and second support plates 211 and 212 come close to and away from each other, and the in-plane load (see FIG. 5) is applied to the pipe elbow 1 whose end portions are supported by the first and second support plates 211 and 212. 5 and FIG. 6, a load in the left-right direction can be applied.

  In addition, the control device 61 controls the hydraulic supply / discharge device 62 to supply and discharge hydraulic pressure from the hydraulic source 63 to the hydraulic cylinder 241 to drive the hydraulic cylinder 241 to extend and contract. Then, the expansion / contraction driving force of the hydraulic cylinder 241 is transmitted to the first and second support plates 211 and 212, and the first and second support plates 211 and 212 are reciprocally rotated in synchronization. Therefore, an out-of-plane load (a vertical load in FIG. 5) can be applied to the pipe elbow 1 whose ends are supported by the first and second support plates 211 and 212.

  When an in-plane load is applied to the pipe elbow 1 supported by the first and second support plates 211 and 212, only the moving plate 223 (first support plate 211) is reciprocated, and the pipe elbow 1 Therefore, the central portion in the longitudinal direction reciprocates with the end portion supported by the second support plate 212 as a base point. At this time, the control device 61 supplies and discharges hydraulic pressure to and from the hydraulic cylinder 241 by the hydraulic supply / discharge device 62 and moves by the same amount as the hydraulic cylinder 231, thereby rotating the first and second support plates 211 and 212. Stop.

  On the other hand, when an out-of-plane load is applied to the pipe elbow 1 by reciprocatingly rotating the first and second support plates 211 and 212, the pipe elbow 1 is bent and deformed in the out-of-plane direction, so that the total length varies. Then, one end moves in the longitudinal direction (in-plane direction). Therefore, when the hydraulic supply / discharge device 62 supplies and discharges hydraulic pressure to the hydraulic cylinder 241 to apply an out-of-plane load to the pipe elbow 1, the control device 61 determines the hydraulic supply / discharge device 62 according to the bending amount of the pipe elbow 1. Thus, the hydraulic pressure is supplied to and discharged from the hydraulic cylinder 231 and the moving plate 223 is reciprocated.

  The application of the in-plane load and the out-of-plane load to the pipe elbow 1 can be performed in order and simultaneously. Therefore, the yield strength test of the pipe elbow 1 using the pipe elbow bending test apparatus of Example 1 can be performed in a short time.

  Then, in the proof test of the pipe elbow 1, after applying an in-plane load and an out-of-plane load to the pipe elbow 1 over a predetermined period, the durability of the pipe elbow 1 is inspected. To evaluate.

  As described above, in the pipe elbow bending test apparatus according to the third embodiment, the first and second support plates 211 and 212 and the first and second support plates 211 that can support the ends of the pipe elbow 1, respectively. , 212 that rotatably support the first and second bearings 213 and 214, and a rotary drive device 215 that rotates the first and second support plates 211 and 212 via the first and second bearings 213 and 214, and A movement support mechanism 216 that supports the first support plate 223 so as to be able to approach and move apart and a movement drive device 217 that can operate the movement support mechanism 216 are provided.

  Therefore, when the movement support mechanism 216 is actuated by the movement drive device 217, the first support plate 211 reciprocates without rotating, whereby an in-plane load can be applied to the pipe elbow 1. Further, when the first and second support plates 211 and 212 are rotated by the rotation driving device 215 via the first and second bearings 213 and 214, an out-of-plane load can be applied to the pipe elbow 1. When an out-of-plane load is applied to the pipe elbow 1, each end of the pipe elbow 1 rotates, so that no shearing force acts on the pipe elbow 1, and an appropriate bending is applied to the pipe elbow 1. Highly accurate test data can be obtained by applying a load.

  Further, in the pipe elbow bending test apparatus according to the third embodiment, a hydraulic cylinder 241 installed between the first and second support plates 211 and 212 is provided as the rotation driving device 215. Therefore, in order to use the rotary drive device 215 as the hydraulic cylinder 241 installed between the first and second support plates 211 and 212, the entire device is laid by arranging the hydraulic cylinder 241 in the in-plane load direction. The area can be reduced, and the apparatus can be made compact.

  FIG. 7 is a plan view illustrating a pipe elbow bending test apparatus according to a fourth embodiment of the present invention, and FIG. 8 is a front view illustrating the pipe elbow bending test apparatus according to the fourth embodiment. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the pipe elbow bending test apparatus of Example 4, as shown in FIGS. 7 and 8, the pipe elbow 1 has a bent portion 3 in which the intermediate portion in the longitudinal direction of the main body 2 is bent at approximately 90 degrees, Connecting portions (joints) 4 and 5 are provided at each end in the longitudinal direction. The pipe elbow 1 can be attached so that the connecting portions (joints) 4 and 5 can be rotated by the mounting members 6 and 7 and the horizontal mounting shafts 8 and 9.

  The pipe elbow bending test apparatus according to the fourth embodiment includes first and second support plates (supports) 311 and 312, first and second bearings (rotation support mechanisms) 313 and 314, a rotation driving device 315, and The first and second movement support mechanisms 316 and 317 and a movement drive device 318 are included.

  Guide rails 322 and 323 are fixed to the upper surface of the base 321, and the guide rails 322 and 323 are each composed of two parallel rail members. The first and second moving plates (moving bodies) 324 and 325 are supported on the guide rails 322 and 323 by the guide members 326 and 327 so as to be movable. Here, the first and second movement support mechanisms 316 and 317 are configured by the guide rails 322 and 323, the first and second moving plates 324 and 325, the guide members 326 and 327, and the like.

  The movement drive device 318 has a hydraulic cylinder 331, and this hydraulic cylinder 331 is connected to a mounting bracket 332 whose base end is fixed together with the base 321. The hydraulic cylinder 331 includes a drive rod 333 that extends toward the first moving plate 324, and the driving rod 333 has a connecting shaft 335 that has a tip portion extending along the vertical direction with respect to the first moving plate 324 via the load cell 334. , 317.

  Further, the first moving plate 324 and the second moving plate 325 are connected by a left and right link mechanism 336. The link mechanism 336 has a pair of first links 337 having one end portion rotatably connected to the first and second moving plates 324 and 325 and the other end portions rotatably connected to each other, and one end The base part is a pair of second links 338 that are pivotally connected to the intermediate part of each first link 337 and whose other end parts are pivotally connected to each other, and the connecting part of each second link 338. 321 has a support shaft 339 that is rotatably supported by 321.

  Therefore, when the hydraulic cylinder 331 in the movement drive device 318 is expanded and contracted, the first and second moving plates 324 and 325 can be reciprocated. That is, when the first moving plate 324 is moved forward, the moving force of the first moving plate 324 is transmitted to the second moving plate 325 via each link mechanism 336, and the second moving plate 325 moves forward. 1. The second moving plates 324 and 325 can be moved closer to and away from each other.

  The first and second support plates 311 and 312 are supported by the first and second bearings 313 and 314 so as to be rotatable in the horizontal direction on the first and second moving plates 324 and 325. The pipe elbow 1 can be rotatably attached to the connecting portions 4 and 5 at the respective end portions with the mounting shafts 8 and 9 by the mounting members 6 and 7 in a standing state.

  The rotation driving device 315 has an interlocking mechanism that rotates the first and second support plates 311 and 312 as the first and second moving plates 324 and 325 approach and leave the moving driving device 318. This interlocking mechanism has a connecting rod 343 whose ends are rotatably connected to the first and second support plates 311 and 312 by connecting shafts 341 and 342. One end of the connecting rod 343 is rotatably connected to a bracket 344 projecting to the side of the first support plate 311 by a connecting shaft 341, and the load cell 345 is connected to the other end, and the load cell 345 is a second support. A connecting shaft 342 is rotatably connected to a bracket 346 protruding to the side of the plate 312. In this case, the connecting rod 343 is disposed along a direction parallel to the hydraulic cylinder 331.

  Accordingly, when the hydraulic cylinder 331 in the movement driving device 318 is expanded and contracted, as described above, the first and second moving plates 324 and 325 approach and separate from each other. At this time, the first and second moving plates 324 and 325 are moved by the connecting rod 343 in the rotation driving device 315. The second support plates 311 and 312 can be reciprocated.

  The control device 61 can control a hydraulic supply / discharge device (for example, a switching valve) 62, and the hydraulic supply / discharge device 62 supplies and discharges hydraulic pressure between the hydraulic source 63 and the hydraulic cylinder 331. Can do. In other words, the control device 61 can supply and discharge hydraulic pressure to and from the hydraulic cylinder 331 via the hydraulic supply / discharge device 62 in accordance with a command from the operator, and execute the expansion / contraction drive.

  Specifically, the control device 61 supplies / discharges hydraulic pressure to / from the hydraulic cylinder 331 by the hydraulic supply / discharge device 62, thereby expanding / contracting the hydraulic cylinder 331 and reciprocating the first and second moving plates 324, 325. By doing so, the first and second support plates 311 and 312 can be moved closer to and away from each other. At this time, the first and second support plates 311 and 312 can be reciprocally rotated by the rotation drive device (interlocking mechanism) 315.

  Here, the yield strength test method for the pipe elbow 1 using the pipe elbow bending test apparatus of Example 4 will be described.

  In the strength test of the pipe elbow 1 by the pipe elbow bending test apparatus of the fourth embodiment, first, the connecting portions 4 and 5 are respectively supported by the first and second support members 6 and 7 with the mounting members 6 and 7 while the pipe elbow 1 is standing. It is fixed to the plates 311 and 312 and supported. Next, in this state, the control device 61 controls the hydraulic supply / exhaust device 62 to supply / discharge hydraulic pressure from the hydraulic source 63 to the hydraulic cylinder 331 to drive the hydraulic cylinder 331 to extend and contract. Then, the expansion / contraction driving force of the hydraulic cylinder 331 is transmitted to the first moving plate 324, and the first moving plate 324 reciprocates. Then, the moving force of the first moving plate 324 is transmitted to the second moving plate 325 via each link mechanism 336, and the second moving plate 325 moves forward, so that the first and second moving plates 324, 325 are Therefore, an in-plane load (the load in the left-right direction in FIGS. 7 and 8) is applied to the pipe elbow 1 whose ends are supported by the first and second support plates 311 and 312. can do.

  Further, when the first and second moving plates 324 and 325 approach and separate, the first and second moving plates 324 are connected to each other by the connecting rod 343 because the first and second supporting plates 311 and 312 are connected. , 325 and reciprocatingly rotate in synchronism with each other. Therefore, an out-of-plane load (a vertical load in FIG. 7) can be applied to the pipe elbow 1 whose ends are supported by the first and second support plates 311 and 312.

  That is, by driving the hydraulic cylinder 331 to extend and contract, it is possible to simultaneously apply an in-plane load and an out-of-plane load to the pipe elbow 1. Therefore, the yield strength test of the pipe elbow 1 using the pipe elbow bending test apparatus of Example 1 can be performed in a short time.

  Then, in the proof test of the pipe elbow 1, after applying an in-plane load and an out-of-plane load to the pipe elbow 1 over a predetermined period, the durability of the pipe elbow 1 is inspected. To evaluate.

  As described above, in the pipe elbow bending test apparatus according to the fourth embodiment, the first and second support plates 311 and 312 and the first and second support plates 311 that can support the respective ends of the pipe elbow 1 are provided. , 312 rotatably supporting the first and second bearings 313, 314, the first and second support plates 311 and 312 rotating through the first and second bearings 313, 314, First and second moving support mechanisms 316 and 317 that support the first and second supporting plates 311 and 312 so as to be able to approach and move apart, and a moving drive device 318 that can operate the first and second moving support mechanisms 316 and 317 are provided. Provided.

  Therefore, when the first and second movement support mechanisms 316 and 317 are actuated by the movement drive device 318, the first and second support plates 311 and 312 reciprocate to apply an in-plane load to the pipe elbow 1. can do. At this time, when the first and second support plates 311 and 312 are rotated via the first and second bearings 313 and 314 by the rotation driving device (interlocking mechanism) 315, an out-of-plane load is applied to the pipe elbow 1. be able to. When an out-of-plane load is applied to the pipe elbow 1, each end of the pipe elbow 1 rotates, so that no shearing force acts on the pipe elbow 1, and an appropriate bending is applied to the pipe elbow 1. Highly accurate test data can be obtained by applying a load.

  Further, in the bending elbow bending test apparatus of the fourth embodiment, the first and second support plates 311 and 11 are used as the rotation drive device 315 as the first and second movement plates 324 and 325 are moved closer and away by the movement drive device 318. An interlocking mechanism for rotating 312 is provided. Therefore, since the first and second support plates 311 and 312 rotate as the first and second moving plates 324 and 325 approach and separate by the interlocking mechanism, a driving device such as a fluid pressure cylinder becomes unnecessary, and the device Simplification and cost reduction can be achieved, and an in-plane load and an out-of-plane load can be simultaneously applied to the pipe elbow 1.

  Further, in the pipe elbow bending test apparatus according to the fourth embodiment, a connecting rod 343 whose ends are rotatably connected to the first and second support plates 311 and 312 is provided as an interlocking mechanism. Therefore, it is only necessary to connect the first and second support plates 311 and 312 by the connecting rod 343, and the complexity and cost increase of the apparatus can be suppressed.

  FIG. 9 is a plan view illustrating a pipe elbow bending test apparatus according to a fifth embodiment of the present invention, and FIG. 10 is a front view illustrating the pipe elbow bending test apparatus according to the fifth embodiment. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the pipe elbow bending test apparatus of Example 5, as shown in FIGS. 9 and 10, the pipe elbow 1 has a bent portion 3 in which the intermediate portion in the longitudinal direction of the main body 2 is bent at approximately 90 degrees, Connecting portions (joints) 4 and 5 are provided at each end in the longitudinal direction. The pipe elbow 1 can be attached so that the connecting portions (joints) 4 and 5 can be rotated by the mounting members 6 and 7 and the horizontal mounting shafts 8 and 9.

  The pipe elbow bending test apparatus of Example 5 includes first and second support plates (supports) 311 and 312, first and second bearings (rotation support mechanisms) 313 and 314, a rotation drive device 315, The first and second movement support mechanisms 316 and 317 and the first and second movement driving devices 318 and 350 are configured.

  The guide rails 322 and 323 are fixed to the upper surface of the base 321, and the first and second moving plates (moving bodies) 324 and 325 are movably supported by the guide rails 322 and 323 by the guide members 326 and 327. ing. The first and second movable drive devices 318 and 350 have first and second hydraulic cylinders 331 and 351, respectively. Each of the hydraulic cylinders 331 and 351 has a mounting bracket 332 whose base end is fixed together with the base 321. 352. The hydraulic cylinders 331 and 351 have drive rods 333 and 353 extending toward the first and second moving plates 324 and 325, and the front ends of the drive rods 333 and 353 are connected to the load cells 334 and 354, respectively. The moving plates 324 and 325 are connected by connecting shafts 335 and 355 along the vertical direction. Further, the first moving plate 324 and the second moving plate 325 are connected by a left and right link mechanism 336.

  Accordingly, when the hydraulic cylinders 331 and 351 in the first and second movement driving devices 318 and 350 are expanded and contracted, the first and second moving plates 324 and 325 can be reciprocated. At this time, the first moving plate 324 and the second moving plate 325 are interlocked by each link mechanism 336.

  The first and second support plates 311 and 312 are supported by the first and second bearings 313 and 314 so as to be rotatable in the horizontal direction on the first and second moving plates 324 and 325. The rotation drive device 315 has an interlocking mechanism that rotates the first and second support plates 311 and 312 as the first and second moving plates 324 and 325 approach and leave the moving drive device 317. This interlocking mechanism has a connecting rod 343 whose ends are rotatably connected to the first and second support plates 311 and 312 by connecting shafts 341 and 342.

  Accordingly, when the hydraulic cylinders 331 and 351 in the movement drive device 318 are expanded and contracted, the first and second movement plates 324 and 325 approach and separate from each other. At this time, the first and second supports are supported by the connecting rod 343 in the rotation drive device 315. The plates 311 and 312 can be reciprocated.

  Here, the yield strength test method for the pipe elbow 1 using the pipe elbow bending test apparatus of the fifth embodiment will be described.

  In the strength test of the pipe elbow 1 using the pipe elbow bending test apparatus of the fifth embodiment, first, the connecting portions 4 and 5 are respectively supported by the first and second support members 6 and 7 with the mounting members 6 and 7 in the state where the pipe elbow 1 is raised. It is fixed to the plates 311 and 312 and supported. Next, in this state, the control device 61 controls the hydraulic supply / discharge device 62 to supply / discharge hydraulic pressure from the hydraulic source 63 to the hydraulic cylinders 331, 351, thereby reducing the hydraulic cylinders 331, 351. Extend and retract. Then, the expansion / contraction driving force of the hydraulic cylinders 331 and 351 is transmitted to the first and second moving plates 324 and 325, and the first and second moving plates 324 and 325 reciprocate, so that the first and second support plates are moved. An in-plane load (the load in the left-right direction in FIGS. 9 and 10) can be applied to the pipe elbow 1 whose ends are supported by the plates 311 and 312.

  Further, when the first and second moving plates 324 and 325 approach and separate, the first and second moving plates 324 are connected to each other by the connecting rod 343 because the first and second supporting plates 311 and 312 are connected. , 325 and reciprocatingly rotate in synchronism with each other. Therefore, an out-of-plane load (a vertical load in FIG. 9) can be applied to the pipe elbow 1 whose ends are supported by the first and second support plates 311 and 312.

  In other words, the in-plane load and the out-of-plane load can be simultaneously applied to the pipe elbow 1 by driving the hydraulic cylinders 331 and 351 to extend and contract. Therefore, the yield strength test of the pipe elbow 1 using the pipe elbow bending test apparatus of Example 1 can be performed in a short time.

  Then, in the proof test of the pipe elbow 1, after applying an in-plane load and an out-of-plane load to the pipe elbow 1 over a predetermined period, the durability of the pipe elbow 1 is inspected. To evaluate.

  As described above, in the pipe elbow bending test apparatus according to the fifth embodiment, the first and second support plates 311 and 312 and the first and second support plates 311 that can support the ends of the pipe elbow 1, respectively. , 312 rotatably supporting the first and second bearings 313, 314, the first and second support plates 311 and 312 rotating through the first and second bearings 313, 314, First and second movement support mechanisms 316 and 317 that support the first and second support plates 311 and 312 so as to be able to move toward and away from each other; a movement drive device 318 that can operate the first and second movement support mechanisms 316 and 317; 350 is provided.

  Accordingly, when the first and second movement support mechanisms 316 and 317 are actuated by the first and second movement drive devices 318 and 350, the first and second support plates 311 and 312 reciprocate, so that the pipe elbow 1 An in-plane load can be applied. At this time, when the first and second support plates 311 and 312 are rotated via the first and second bearings 313 and 314 by the rotation driving device (interlocking mechanism) 315, an out-of-plane load is applied to the pipe elbow 1. be able to. When an out-of-plane load is applied to the pipe elbow 1, each end of the pipe elbow 1 rotates, so that no shearing force acts on the pipe elbow 1, and an appropriate bending is applied to the pipe elbow 1. Highly accurate test data can be obtained by applying a load.

  Further, in the pipe elbow bending test apparatus according to the fifth embodiment, the first and second movement driving apparatuses 318 and 350 are provided corresponding to the first and second movement support mechanisms 316 and 317, respectively. Therefore, when the first and second movement support mechanisms 316 and 317 are actuated by the first and second movement drive devices 318 and 350, the reaction force acting on the connecting shaft 335 in the link mechanism 336 is reduced. While the breakage of 336 can be prevented, the link mechanism 336 can be simplified.

  In the fifth embodiment, the control device 61 controls the first and second movement drive devices 318 and 350 synchronously to operate the first and second movement support mechanisms 316 and 317 synchronously with high accuracy. The link mechanism 336 can be abolished.

  In each of the above-described embodiments, the rotary drive device and the movement drive device are hydraulic cylinders. However, the present invention is not limited to this configuration, and may be an air cylinder, an electric motor, a hydraulic motor, or the like.

1 Piping elbow 3 Bent part 4, 5 Connecting part (joint)
11, 111, 211, 311 First support plate (support)
12, 112, 212, 312 Second support plate (support)
13, 113, 213, 313 First bearing (rotation support mechanism)
14, 114, 214, 314 Second bearing (rotation support mechanism)
15, 115, 215, 315 Rotation drive device 16,316 First movement support mechanism (movement support mechanism)
17,317 Second moving support mechanism (moving support mechanism)
18, 318 First movement drive unit 19,350 Second movement drive unit 25,324 First movement plate (moving body)
26,325 Second moving plate (moving body)
31, 331 First hydraulic cylinder 32,351 Second hydraulic cylinder 41 Hydraulic cylinder (rotation drive source)
46 Slide member 50 1st link 51 2nd link 61 Control device 116,216 Movement support mechanism 117,217 Movement drive device 125,223 Movement plate (moving body)
131, 231 Hydraulic cylinder 141, 241 Hydraulic cylinder 145 Slide member 146 First link 147 Second link 152 Third link 153 Fourth link 343 Connecting rod (interlocking mechanism)

Claims (8)

First and second supports each capable of supporting each end of the pipe elbow;
First and second rotation support mechanisms for rotatably supporting the first and second supports;
A rotation drive device capable of operating the first and second rotation support mechanisms;
A movable support mechanism for supporting at least one of the first and second support members so as to be movable toward and away from the other;
A movement drive device capable of operating the movement support mechanism;
A bending elbow bending test apparatus characterized by comprising:   The rotary drive device includes a rotary drive source, a slide member that can be reciprocated by the rotary drive source, and first and second links that connect the slide member and the first and second supports. The bending elbow bending test apparatus according to claim 1.   The movement support mechanism includes a movable body that can be reciprocated by the movement drive device, and one of the first and second support bodies is moved by one of the first and second rotation support mechanisms. 3. The pipe elbow bending test apparatus according to claim 1, wherein the apparatus is supported by a body. The movement drive device includes first and second movement drive devices, the movement support mechanism includes first and second movement support mechanisms, and the first and second movement support mechanisms are reciprocally movable. The moving body includes first and second moving bodies, and the first and second supporting bodies are supported by the first and second moving bodies by the first and second rotating support mechanisms. 4. A pipe elbow bending test apparatus according to claim 3, wherein a control device for synchronously driving the second movement drive device is provided.   The said control apparatus controls the movement amount of the said 1st, 2nd moving body by the said movement drive apparatus according to the bending amount of the said piping elbow at the time of drive control of the said rotational drive apparatus. The bending elbow bending test equipment described in 1.   The pipe elbow bending test apparatus according to any one of claims 1 to 5, wherein the rotation driving device includes a fluid cylinder provided between the first and second supports.   The said rotation drive device has an interlocking mechanism which rotates the said 1st, 2nd support body according to the said 1st, 2nd support body approaching / separating by the said movement drive device. Pipe elbow bending test equipment.   The movement support mechanism includes a movable body that can be reciprocated by the movement drive device, and one of the first and second support bodies is moved by one of the first and second rotation support mechanisms. The pipe elbow bending test according to claim 7, wherein the interlocking mechanism includes a connecting rod that is pivotally connected to the first and second support members at each end. apparatus.

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