Test facility

Abstract

A test facility (1A) comprises: a plurality of pipelines connected in an axial direction; at least one drainage part (40A); and at least one stand (51A1-51A2, 52A1-52A6). The plurality of pipelines include a storage pipeline (20A1) for storing water, and hollow pipelines (30A1-30A4) which are pipelines other than the storage pipeline. The storage pipeline (20A1) is located vertically below the hollow pipelines (30A1-30A4). The at least one drainage part (40A) is connected to the storage pipeline (20A1) from a radial direction, and the at least one stand (51A1-51A2, 52A1-52A6) supports the plurality of pipelines above ground.

Description

Testing Equipment

[0001] The present disclosure relates to test equipment.

[0002] Pipes that protect communication cables and the like are buried underground. Disconnection of buried pipes due to the presence of foreign objects such as soil or rust inside the pipes can lead to design changes or construction schedule pressures for communication cables. To easily detect disconnections, studies are underway to develop systems for inspecting pipe continuity using simple and fast sensing technologies at lower cost than conventional inspections using mandrels or pipe cameras. Meanwhile, tests on underground pipes are sometimes performed by installing a simulated pipe above ground. For example, Non-Patent Document 1 discloses that, to test a system for measuring the position of underground pipes, a simulated pipe is installed above ground and photographs are taken using a camera that passes inside the simulated pipe.

[0003] 75th Annual Academic Lecture Meeting of the Japan Society of Civil Engineers, 2020, VI-585, "Development of Pipe Positioning System (PPS)" [online], [Retrieved April 30, 2024], Internet<URL: http: / / library.jsce.or.jp / jsce / open / 00035 / 2020 / 75-06 / 75-06-0585.pdf>

[0004] Inside buried pipelines, there is often water, such as rainwater or groundwater, seeping in from adjacent manholes or joints of the buried pipeline. Unlike the verification of a system that measures the position of buried pipelines, as described above, the verification of a system that inspects the continuity of buried pipelines must take into account the presence of such water. Therefore, a new technology that enables the verification of systems that inspect the continuity of pipelines is essential.

[0005] In view of the above circumstances, an object of the present disclosure is to provide a technology that enables verification of a system for inspecting the continuity of a pipeline.

[0006] In order to solve the above-mentioned problems, the test equipment disclosed herein is a test equipment comprising a plurality of axially connected pipelines, at least one drainage section, and at least one platform, wherein the plurality of pipelines include a storage pipeline that stores water and a hollow pipeline that is a pipeline other than the storage pipeline, the storage pipeline is located vertically below the hollow pipeline, the at least one drainage section is connected radially to the storage pipeline, and the at least one platform supports the plurality of pipelines on the ground.

[0007] According to the present disclosure, it is possible to provide a technology that enables verification of a system that checks the continuity of a pipeline.

[0008] FIG. 1 is a diagram showing the configuration of a test facility according to a first embodiment; FIG. 2 is a flowchart showing the flow of verification of continuity inspection; FIG. 3 is a diagram showing a modified example of the configuration of the test facility according to the first embodiment; FIG. 4 is a diagram showing the configuration of a continuous test facility to which the first embodiment is applied; FIG. 5 is a diagram showing the configuration of a test facility according to a second embodiment; FIG. 6 is a diagram showing the configuration of a test facility according to a third embodiment; FIG. 7 is a diagram showing the configuration of a test facility according to a modified example; FIG. 8 is a diagram showing the configuration of a test facility according to a modified example.

[0009] Hereinafter, several embodiments of the present disclosure will be described with reference to the accompanying drawings. In the following description, the terms "vertical direction," "upper," and "lower" refer to directions parallel to the Z-axis of the coordinate system depicted in the drawings, and the term "horizontal direction" refers to directions parallel to the XY plane of the coordinate system depicted in the drawings.

[0010] In each drawing, the same or corresponding parts are denoted by the same reference numerals. In the description of each embodiment, the description of the same or corresponding parts will be omitted or simplified as appropriate.

[0011] In each embodiment, the test facility 1 is a test facility including a plurality of axially connected pipelines, at least one drainage section 40, and at least one pedestal 50. The plurality of pipelines include a storage pipeline 20 that stores water and a hollow pipeline 30 that is a pipeline other than the storage pipeline 20. The storage pipeline 20 is located vertically below the hollow pipeline 30. The at least one drainage section 40 is connected to the storage pipeline 20 in the radial direction, and the at least one pedestal 50 supports the plurality of pipelines on the ground. The test facility 1 is a collective term for test facilities 1A to 1D and 1A1 to 1A3, which will be described later. The storage pipeline 20 is a collective term for storage pipelines 20A1 to 20A5, 20B1, 20C1 to 20C13, 20D, and 20R1 to 20R3, which will be described later. Hollow conduit 30 is a general term for hollow conduits 30A1 to 30A8, 30B1, 30B2, 30C1 to 30C4, 30D, 30D1, 30D2, 30R1, and 30R2, which will be described later. Drainage unit 40 is a general term for drainage units 40A1 to 40A3, 40B, and 40C, which will be described later. Mount 50 is a general term for first mount 51 and second mount 52, which will be described later. First mount 51 is a general term for first mounts 51A1 and 51A2, which will be described later. Second mount 52 is a general term for second mounts 52A1 to 52A6, which will be described later.

[0012] 1 shows the configuration of a test facility 1A according to this embodiment. The test facility 1A includes, as multiple pipelines, one encased pipeline 20A1 and four hollow pipelines 30A1 to 30A4. The test facility 1A also includes first frames 51A1 and 51A2 that support the encased pipeline 20A1, and second frames 52A1 to 52A6 that support the hollow pipeline 30.

[0013] The test facility 1A is an above-ground reproduction of an underground buried pipeline. The test facility 1A is used to verify continuity inspections using signals sent to buried pipelines. The multiple pipelines included in the test facility 1A may house the same cables and other components as those housed in actual buried pipelines. As described below, the contained pipeline 20 included in the test facility 1A is located at a lower vertical height than the hollow pipeline 30. This allows the test facility 1A to easily reproduce a buried pipeline with water inside. From the open end OEA1, which is one end of the test facility 1A, an operator transmits any measurement signal, such as a sweep signal, using a measuring device such as a speaker. The contained pipeline 20A1 can contain water without the need to block both ends using stop valves or the like, so the signal can pass through the test facility 1A. The measurement signal includes sound waves. The measurement signal may also include ultrasound, electromagnetic waves, and the like. The measurement device may be partially or entirely inserted into the test facility 1A through the open end OEA1. An operator receives and analyzes the transmitted signal at the other open end OE2 of the test facility 1A. For example, the operator may use a measurement condenser microphone to collect sound and perform analysis in the time domain or frequency domain. This allows the operator to investigate, for example, the relationship between the amount of water inside the test facility 1A and the degree of signal communication. The operator may verify the feasibility of the measurement device based on whether the degree of signal attenuation is less than a predetermined value.

[0014] The test facility 1A according to this embodiment can reduce costs for excavation and the like compared to, for example, constructing a verification facility underground. Since the entire test facility 1A is exposed above ground, accessibility to the test facility 1A for workers is improved. Therefore, it becomes possible to easily and simply verify the continuity inspection of buried pipelines where water is present. Therefore, this embodiment can provide a technology that enables verification of a system for inspecting the continuity of pipelines.

[0015] The configuration of the test facility 1A will be described in detail with reference to FIGS.

[0016] The contained pipeline 20A1 or the hollow pipelines 30A1 to 30A4 may be made of, for example, steel pipes, vinyl pipes, etc. The contained pipeline 20A1 or the hollow pipelines 30A1 to 30A4 may be connected to each other using joints made of the same material as the buried pipelines. The contained pipeline 20A1 and the hollow pipelines 30A1 and 30A4 in FIG. 1 are straight pipes, while the hollow pipelines 30A2 and 30A3 are curved pipes that bend obliquely downward in the vertical direction. Specifically, the hollow pipelines 30A2 and 30A3 are curved pipes that bend obliquely downward in the opposite direction to the contained pipeline 20A1. The length of the straight pipe is, for example, 5.5 m. The curved pipes have, for example, a bending radius of 10 m and a length of 1 m. One end of the accommodating pipe 20A1 is connected to the hollow pipe 30A2, which is one of the two curved hollow pipes 30A2 and 30A3, and the other end of the accommodating pipe 20A1 is connected to the other hollow pipe 30A3. The total length of the test facility 1A according to this embodiment is about 10 m.

[0017] The ends of hollow conduits 30A1 and 30A4 that are not connected to hollow conduits 30A2 and 30A3 correspond to open ends OEA1 and OEA2 of test equipment 1A, respectively. A predetermined amount of water is poured into one of open ends OEA1 and OEA2 by an operator, and the water flows into containment conduit 20A1. Alternatively, containment conduit 20A1 may have an openable water inlet in the pipe wall, and water may be poured through the inlet. The dashed lines in FIG. 1 indicate an example of the water surface position of the contained water. Water may be contained in a portion of the inside of hollow conduits 30A2 and 30A3, as indicated by the two arrows in FIG. 1.

[0018] In this embodiment, the straight encased pipe 20A1 is positioned vertically downward, and the hollow pipes 30A1 and 30A2, and the hollow pipes 30A3 and 30A4 extend diagonally upward in the vertical direction opposite the encased pipe 20A1, resulting in a U-shaped overall test facility 1A. The vertical height difference between the outer underside of the encased pipe 20A1, shown by the dotted line in FIG. 1, and the open ends OEA1 and OEA2 may be, for example, 0.25 m. For example, the open ends OEA1 and OEA2 may be larger by using the curved hollow pipes 30A2 and 30A3, which have a steeper bend, or the straight hollow pipes 30A1 and 30A4, which are longer. The vertical heights of the open ends OEA1 and OEA2 may also be different from each other. In the test equipment 1A having the U-shaped structure of this embodiment, the operator can easily prepare a desired pattern, such as a pattern in which only a portion of the cross section of the containing pipeline 20A1 is filled with water, or a pattern in which the entire cross section is filled with water, by adjusting the amount of water injected.

[0019] The drainage unit 40A is provided radially relative to the storage pipeline 20A1. The drainage unit 40A may include a drainage outlet provided on the outer underside of the storage pipeline 20A1, a pipe extending vertically downward from the drainage outlet, and a lever-equipped valve provided midway along the pipe. When an operator twists the valve, water inside the storage pipeline 20A1 flows out of the storage pipeline 20A1 through the drainage outlet and the pipe. This allows the water inside the storage pipeline 20A1 to be smoothly drained out, making it possible to empty the inside of the storage pipeline 20A1 in a short period of time. In other words, the drainage unit 40A makes it easy to change the water level inside the storage pipeline 20A1.

[0020] The frame 50 is provided to support the test facility 1A. The frame 50 may be made of wood, metal, plastic, or the like. The frame 50 includes a first frame 51 supporting the encased pipeline 20 and a second frame 52 supporting the hollow pipeline 30. The first frame 51 or the second frame 52 may include a support member that contacts the outer underside of the encased pipeline 20 or the hollow pipeline 30. The first frame 51 or the second frame 52 may further include a plate portion on which the encased pipeline 20 or the hollow pipeline 30 is placed and fixed. The first frame 51 has a smaller vertical height than the second frame 52. As shown by the second frames 52A1 to 52A3 and 52A4 to 52A6 in FIG. 1 , the height of the second frame 52 in the test facility 1A gradually increases toward the open ends OEA1 and OEA2. The vertical height of the first pedestals 51A1 and 51A2 in FIG. 1 is, for example, 0.75 m, and the vertical height of the second pedestals 52A3 and 52A4 is, for example, 0.85 m. The vertical height of the second pedestals 52A2 and 52A5 in FIG. 1 is, for example, 0.9 m. The vertical height of the second pedestals 52A1 and 52A6 in FIG. 1 is, for example, 1 m. The number and positions of the pedestals 50 may be freely determined by the operator. The first pedestal 51 or the second pedestal 52 may be provided, for example, to support a portion of the straight hollow pipe 30 or the straight storage pipe 20 at a quarter distance from each end. Specifically, for example, two second frames 52 may be provided to support positions 1.375 m from both ends of hollow pipeline 30, which is a 5.5 m straight pipe, and two first frames 51 may be provided to support positions 1.375 m from both ends of accommodation pipeline 20, which is a 5.5 m straight pipe. Second frames 52 may be provided to support the bent portion of hollow pipeline 30, which is a curved pipe.

[0021] A verification method for inspecting communication using the test equipment 1A according to this embodiment will be described below with reference to FIG.

[0022] In step S1, a test operator injects water into the containing pipeline 20 of the test equipment 1A.

[0023] In step S2, the operator transmits a measurement signal from one end of the test equipment 1A.

[0024] In step S3, an operator receives and analyzes the signal transmitted in step S2 at the other end of the test equipment 1A, after which the flow of verifying the continuity check is completed.

[0025] For example, in step S3, the signal may be analyzed for a plurality of patterns in which the amount of water injected into the containing pipe 20 is different. For example, analysis may be performed for three types of patterns: a pattern in which there is no water inside the containing pipe 20, a pattern in which only a portion of the cross section of the containing pipe 20 is filled with water, and a pattern in which the entire cross section of the containing pipe 20 is filled with water.

[0026] The worker may further install a shield inside the contained pipeline 20 to verify the continuity inspection. The shield simulates soil or sand that has gotten into the buried pipeline. The shield may be inserted from the open end OEA1 or OEA2 of the test equipment 1A. The shield may have a plurality of different sizes. For example, in the above-mentioned step S3, the signal may be analyzed for a total of four patterns, including a pattern in which three different sizes of shields, "small," "medium," and "large," are installed, and a pattern in which no shield is installed.

[0027] As a modified example of this embodiment, the number of pipelines provided in the test facility 1A may be changed. FIG. 3 shows an example configuration of the pipelines and drainage section 40A provided in the test facility 1A according to this modified example. Compared to the test facility 1A shown in FIG. 1 , the test facility 1A according to this modified example differs in that it includes five encased pipelines 20A1 to 20A5 instead of the single encased pipeline 20A1, that it additionally includes curved pipelines 30A6 and 30A7 and straight pipelines 30A5 and 30A8 in addition to the four hollow pipelines 30A1 to 30A4, and that the drainage section 40A is provided in the encased pipeline 20A3. In this modified example, any number of racks 50 may be provided at any position. The hollow pipelines 30A6 and 30A7 are curved pipes that bend obliquely upward in the vertical direction. Specifically, each of hollow pipelines 30A6 and 30A7 is a curved pipe that bends obliquely upward toward the accommodated pipelines 20A1 to 20A5. In this modification, the length of the straight pipe is, for example, 5.5 m. The curved hollow pipelines 30A2, 30A3, 30A6, and 30A7 each have a bending radius of, for example, 10 m and a length of 1 m. The overall length of the test facility 1A according to this modification is in the 50 m range. According to this modification, the overall length of the test facility 1A can be freely set depending on the configuration of the buried pipeline to be reproduced or the dimensions of the space in which the test facility 1A is installed.

[0028] As a modified example of this embodiment, multiple test facilities 1A may be axially connected to form a continuous test facility R. FIG. 4 shows an example configuration of multiple pipelines and drainage sections 40A1 to 40A3 included in the continuous test facility R, in which three U-shaped test facilities 1A1 to 1A3 according to the first embodiment are connected. In this modified example, the length of the straight pipe is, for example, 5.5 m. The curved pipe has, for example, a bending radius of 10 m and a length of 1 m. The total length of the continuous test facility R is in the 100 m range. Any number of racks 50 provided in the continuous test facility R may be installed at any position. A measurement signal is transmitted by an operator from the open end OER1 of the continuous test facility R, and the signal is received and analyzed at the other open end OER2. According to this modified example, the amount of water contained in the containment pipeline 20 can be changed for each test facility 1. This makes it possible to reproduce buried pipelines with complex shapes.

[0029] Second Embodiment A second embodiment of the present disclosure will now be described with reference to Fig. 5. Fig. 5 shows a plurality of pipelines and a drainage section 40B included in a testing facility 1B according to the second embodiment.

[0030] The test equipment 1B according to the second embodiment includes a housing conduit 20B1, which is a curved pipe that bends convexly downward in the vertical direction, instead of the housing conduit 20A1 of the test equipment 1A according to the first embodiment. Furthermore, the test equipment 1B includes straight hollow conduits 30B1 and 30B2 instead of the hollow conduits 30A1 to 30A4 of the test equipment 1A according to the first embodiment. Instead of the drainage section 40A of the test equipment 1A according to the first embodiment, the test equipment 1B includes a drainage section 40B provided in the housing conduit 20B1. In this embodiment, any number of pedestals 50 may be provided at any position.

[0031] One end of the encased pipe 20B1 is connected to hollow pipe 30B1, which is one of two straight hollow pipes 30B1 and 30B2, and the other end of the encased pipe 20B1 is connected to hollow pipe 30B2. An operator transmits a measurement signal from one of the open ends OEB1 and OEB2 of the test equipment 1B, and the signal is received and analyzed at the other end. In this embodiment, the length of the straight pipe is, for example, 5.5 m. The curved pipe has, for example, a bending radius of 10 m and a length of 1 m. The overall length of the test equipment 1B in FIG. 5 is in the 10 m range.

[0032] In this embodiment, the encased pipe 20B1, which is a curved pipe, is bent downward in a convex shape, and the hollow pipes B1 and 30B2 extend diagonally upward in the vertical direction opposite the encased pipe 20B1, resulting in a V-shaped structure for the entire test facility 1B. The vertical height difference between the position of the curved outer lower surface of the encased pipe 20B1 and the positions of the open ends OEB1 and OEB2, as shown by the dotted line in FIG. 5, is, for example, 0.25 m. For example, the difference in vertical height may be set larger by using a curved encased pipe 20B1 with a steeper bend or longer straight hollow pipes 30B1 and 30B2. The vertical heights of the open ends OEB1 and OEB2 may also be different from each other.

[0033] According to this embodiment, the storage pipe 20B1, which is at a low vertical height, is a curved pipe, so that a test facility 1B relating to a pattern in which the entire cross section of the storage pipe 20B1 is filled with water can be easily prepared using a smaller amount of water compared to the first embodiment.

[0034] As a modification of this embodiment, the test facility 1B may be configured to include a greater number of pipelines. For example, the test facility 1B may include one or more hollow pipelines 30 in addition to the hollow pipelines 30B1 and 30B2. In this modification, any number of drainage units 40 and stands 50 may be provided at any positions.

[0035] As a modified example of this embodiment, a plurality of test facilities 1B may be connected in the axial direction to form a continuous test facility R. The pedestals 50 included in the continuous test facility R may be provided at any position and in any number.

[0036] Third Embodiment A third embodiment of the present disclosure will now be described with reference to Fig. 6. Fig. 6 shows a plurality of pipelines and a drainage section 40C included in a testing facility 1C according to the third embodiment.

[0037] All of the multiple pipelines included in the test equipment 1C according to the third embodiment are straight pipes. Referring to FIG. 6 , the test equipment 1C includes straight hollow pipelines 30C1 to 30C4 and straight encased pipelines 20C1 to 20C13, instead of the encased pipeline 20A1 and the hollow pipelines 30A1 to 30A4 of the test equipment 1A according to the first embodiment. Instead of the drainage section 40A of the test equipment 1A according to the first embodiment, the test equipment 1C includes a drainage section 40C provided in the encased pipeline 20C7, which is the lowest in the vertical direction, among the encased pipelines 20C1 to 20C13. The first frame 51 supporting the encased pipelines 20C1 to 20C13 and the second frame 52 supporting the hollow pipelines 30C1 to 30C4 may be provided in any number and at any position. An operator transmits a measurement signal from one of the open ends OEC1 and OEC2 of the test equipment 1C, and the signal is received and analyzed at the other end. The length of the straight pipe in this embodiment is, for example, 5.5 m. The total length of the test equipment 1C in Figure 6 is about 90 m.

[0038] The multiple conduits included in the test facility 1C bend vertically downward due to their own weight or the weight of the cables and other components housed therein. The degree of bending can be adjusted by changing the vertical height of the first frame 51 and the second frame 52. Specifically, the height of the first frame 51 supporting the lowest housed conduit 20 in the vertical direction may be set to be the smallest, and the heights of the first frames 51 supporting the other housed conduits 20 may be set to gradually increase toward the open ends OEC1 and OEC2. The difference in vertical height between the position of the outer lower surface of the housed conduit 20C7, shown by the dotted line in FIG. 6, and the positions of the open ends OEC1 and OEC2 is, for example, 0.5 m.

[0039] According to this embodiment, the test facility 1C can be constructed using only straight pipes, which are most commonly used for buried pipelines, and therefore it is possible to carry out verification that more closely resembles an actual buried pipeline.

[0040] As a modification of this embodiment, the test facility 1C may be configured to include a greater number of pipelines. For example, the test facility 1C may include one or more hollow pipelines 30 or enclosing pipelines 20 in addition to the hollow pipelines 30C1 to 30C4 and the straight enclosing pipelines 20C1 to 20C13. In this modification, any number of drainage units 40 and pedestals 50 may be provided at any positions.

[0041] As a modified example of this embodiment, a plurality of test facilities 1C may be connected in the axial direction to form a continuous test facility R. The pedestals 50 included in the continuous test facility R may be provided at any position and in any number.

[0042] The present disclosure is not limited to the above-described embodiments. For example, two or more blocks shown in the block diagram may be integrated, or one block may be divided. Two or more steps shown in the flowchart may be executed in parallel or in a different order, instead of being executed in chronological order as described, depending on the processing capabilities of the device executing each step, or as needed. Other modifications are possible within the scope of the present disclosure.

[0043] As a modified example of the present disclosure, a test facility 1D may further include, in addition to the multiple conduits included in the test facilities 1A to 1C described above, a curved pipe that is bent convexly in a predetermined direction on a horizontal plane as a hollow conduit 30 or a storage conduit 20. The test facility 1D according to this modified example has a configuration in which the curved hollow conduits 30D1 and 30D2 are used to bend twice on a horizontal plane. FIG. 7A is an elevation view of the test facility 1D according to this modified example. FIG. 7B is a plan view of the test facility 1D. In FIGS. 7A and 7B, multiple straight storage conduits 20 are collectively referred to as storage conduits 20D, and multiple straight or curved hollow conduits 30 are collectively referred to as hollow conduits 30D. The hollow conduit 30D includes curved hollow conduits 30D1 and 30D2. In this modified example, the length of the straight pipe is, for example, 5.5 m. The curved pipe has, for example, a bending radius of 10 m and a length of 5 m. In this modification, any number of drainage sections 40 and pedestals 50 may be provided at any positions. Referring to FIG. 7B , the encased conduit 30D, which connects to the encased conduit 20D, is bent twice in a horizontal plane by the curved hollow conduits 30D1 and 30D2. This causes the encased conduit 20D and a portion of the hollow conduit 30D to be aligned with the remaining portion of the hollow conduit 30D, with a horizontal difference of 10 meters. This modification makes it possible to reproduce a buried conduit with a complex shape that is bent in a predetermined direction using the test facility 1D.

[0044] As a modified example of the present disclosure, the continuous testing facility R may be one in which testing facilities 1 according to different embodiments are connected. For example, the continuous testing facility R according to this modified example may be one in which at least two types of testing facilities, namely, testing facility 1A according to the first embodiment, testing facility 1B according to the second embodiment, and testing facility 1C according to the third embodiment, are connected in the axial direction.

[0045] As a modification of the present disclosure, a portion of the pipe wall of the storage pipeline 20 may be made of a transparent material such as acrylic, thereby providing a transparent window in the storage pipeline 20. This makes it easier for an operator to check the water level from outside the storage pipeline 20.

[0046] 1A to 1D, 1A1 to 1A3 Test facilities 20A1 to 20A5, 20B1, 20C1 to 20C13, 20D, 20R1 to 20R3 Containment pipelines 30A1 to 30A8, 30B1, 30B2, 30C1 to 30C4, 30D, 30D1, 30D2, 30R1, 30R2 Hollow pipelines 40A1 to 40A3, 40B, 40C Drainage sections 51A1, 51A2 First frames 52A1 to 52A6 Second frames

Claims

1. A testing facility comprising a plurality of axially connected pipelines, at least one drainage section, and at least one frame, wherein the plurality of pipelines include a storage pipeline for storing water and a hollow pipeline that is a pipeline other than the storage pipeline, the storage pipeline is located vertically below the hollow pipeline, the at least one drainage section is connected to the storage pipeline in a radial direction, and the at least one frame supports the plurality of pipelines on the ground.

2. The test facility according to claim 1, wherein the containing pipeline is a straight pipe, the hollow pipeline includes two curved pipes that are bent convexly downward in the vertical direction, and one end of the containing pipeline is connected to one of the two curved pipes, and the other end of the containing pipeline is connected to the other one of the two curved pipes.

3. The test facility described in claim 1, wherein the containing pipeline is a curved pipe that is bent convexly downward in the vertical direction, the hollow pipeline includes two pipes, and one end of the containing pipeline is connected to one of the two pipes, and the other end of the containing pipeline is connected to the other of the two pipes.

4. A testing facility as described in any one of claims 1 to 3, wherein the at least one frame includes a first frame supporting the containing pipeline and a second frame supporting the hollow pipeline, and the first frame has a smaller vertical height dimension than the second frame.

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