Multifunctional high-pressure pipeline full-scale model internal pressure test loading system

Abstract

The invention discloses a multifunctional high-pressure pipeline full-scale model internal pressure test loading system which comprises a counter-force pier column, N synchronous jacks and N loading modules. The cross section of the counter-force pier column is a regular N-polygon ring; one end of each synchronous jack in the force application direction is connected to one outer side surface of the counter-force pier column, and the other end of each synchronous jack is connected with one end of one loading module; the other end of the loading module faces the inner wall of the high-pressure pipeline; and the loading system applies a radial load to the loading module and transmits the radial load to the high-pressure pipeline to carry out a loading test. Different working conditions of the high-pressure pipeline are simulated by adopting the equivalent load, the stress mechanism research of the full-scale model in the whole test loading process can be realized, and the quality and efficiency of the prototype test of the high-pressure pipeline are improved. The loading module can further comprise a plurality of double-web type steel base plates, the adjacent base plates are connected through high-strength bolts so as to meet the use requirements of pressure pipelines of different sizes, and the loading module has the advantages of being flexible in design, wide in applicability and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of pumped-storage pressure pipelines, and in particular relates to a multifunctional high-pressure pipeline full-scale model internal pressure test loading system. Background Art

[0002] Pumped hydropower storage, which connects upstream and downstream reservoirs and powerhouses via penstocks, provides a continuous source of power and is a key approach to promoting renewable energy consumption. The inner diameter of the pipe and the water pressure it withstands are key characteristics of the scale and technical difficulty of penstocks, and their safety and economic performance warrant particular attention. Research on the stress and failure mechanisms of high-pressure pipes is of great theoretical significance.

[0003] At present, domestic and foreign scholars mostly use air bags or water bags, high-pressure water injection systems and as loading devices. Air bags or water bags have simple structures and are easy to control, but they are mostly used for scaled model tests below 2MPa and are difficult to apply to large full-scale model tests. High-pressure water injection systems can simulate real water pressure conditions and are suitable for engineering field tests, but they are expensive and difficult to implement in indoor tests. Some scholars have also proposed using jacks to simulate the internal water pressure of pressure pipes, but existing devices have poor adaptability to the size of full-scale models and cannot meet the load-bearing requirements of high internal water pressure. Therefore, it is necessary to develop a loading device that is simple to load, flexible in design, and widely applicable. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a multifunctional loading system for internal pressure testing of full-scale models of high-pressure pipelines. This loading system applies radial loads to loading modules, which in turn transfer radial loads to the high-pressure pipelines. This system utilizes equivalent loads to simulate different operating conditions of high-pressure pipelines. This allows for the study of the stress mechanisms of full-scale models throughout the entire loading process, thereby improving the quality and efficiency of high-pressure pipeline prototype testing.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A multifunctional high-pressure pipeline full-scale model internal pressure test loading system includes a reaction column, N synchronous jacks and N loading modules; the cross section of the reaction column is a regular N-gon ring;

[0007] One end of each synchronous jack in the force application direction is connected to an outer side surface of the reaction pier, and the other end is connected to one end of the loading module; the other end of the loading module faces the inner wall of the high-pressure pipeline; the loading system performs a loading test by applying a radial load to the loading module and transferring it to the high-pressure pipeline.

[0008] In one embodiment, the reaction pier includes N outer steel plates and N inner steel plates, the N outer steel plates are connected in sequence on the sides to form an outer ring of a regular N-gon ring, and the N inner steel plates are connected in sequence on the sides to form an inner ring of a regular N-gon ring, and the outer ring and the inner ring are connected with honeycomb steel and poured with concrete.

[0009] In one embodiment, a steel mesh consisting of circumferential steel bars and radial stirrups is provided on the inner side of the inner ring.

[0010] In one embodiment, N connecting steel plates are provided on the outside of the reaction pier, one end of one connecting steel plate is welded to the outer wall surface of the outer steel plate, and the other end is welded with a flange plate, and each flange plate is connected to one end of the force application direction of the synchronous jack through a high-strength bolt.

[0011] In one embodiment, an inner flange is provided at one end of the synchronous jack in the force application direction, and each flange plate is connected to an inner flange via a high-strength bolt.

[0012] In one embodiment, the loading module includes a double-web steel loading plate, which includes an inner flange, an outer curved flange and two webs; stiffening ribs are provided between the two webs, and a boot plate is provided on the inner wall of the outer curved flange. The inner flange is connected to the other end of the force application direction of one of the synchronous jacks, and the outer wall of the outer curved flange is in contact with the inner wall of the high-pressure pipe.

[0013] In one embodiment, the loading module also includes a plurality of double-web steel pads, and the inner flange is connected to the other end of the force application direction of a synchronous jack through the plurality of double-web steel pads connected in series along the radial direction, wherein the double-web steel pad and the synchronous jack, the adjacent double-web steel pads, and the double-web steel pad and the double-web steel loading plate are all connected by high-strength bolts.

[0014] In one embodiment, the outer arc-shaped flange is fitted to the high-pressure pipe via a rubber plate, and the load is transferred to the high-pressure pipe via the rubber plate.

[0015] In one embodiment, an outer flange is provided at the other end of the synchronous jack in the force application direction, and the loading module is connected to the outer flange by a second high-strength bolt.

[0016] In one embodiment, a plurality of synchronous jacks in the same radial direction are arranged axially.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Using equivalent loads to simulate different operating conditions of high-pressure pipelines allows for the study of the stress mechanisms of full-scale models throughout the entire loading process, improving the quality and efficiency of high-pressure pipeline prototype testing. The loading module can also include multiple double-web steel pads, connected by high-strength bolts, to accommodate pressure pipelines of varying sizes, offering advantages such as flexible design and wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the multifunctional high-pressure pipeline full-scale model internal pressure test loading system of the present invention.

[0020] Figure 2 It is a cross-sectional schematic diagram of the multifunctional high-pressure pipeline full-scale model internal pressure test loading system of the present invention.

[0021] Figure 3 It is an overall schematic diagram of the reaction pier column in the present invention.

[0022] Figure 4 It is an overall schematic diagram of the synchronous jack in the present invention.

[0023] Figure 5 It is a schematic diagram of the connection between the reaction pier column and the synchronous jack in the present invention.

[0024] Figure 6 It is an overall schematic diagram of the loading module in the present invention.

[0025] Figure 7 It is a schematic diagram of the connection between the loading module and the synchronous jack in the present invention.

[0026] Figure 8 It is an overall schematic diagram of the loading module of the second embodiment of the present invention.

[0027] Icons: 1-reaction pier; 2-synchronous jack; 3-loading module; 4-high-pressure pipeline; 5-rubber plate; 6-connecting steel plate; 7-flange plate; 8-high-strength bolt 1; 9-bolt hole; 10-high-strength bolt 2; 11-outer steel plate; 12-inner steel plate; 13-concrete; 14-honeycomb steel; 15-circumferential steel bar; 16-radial stirrups; 21-inner flange; 22-outer flange; 31-double-web steel loading plate; 32-inner flange; 33-web; 34-outer curved flange; 35-stiffening rib; 36-boot plate; 37-double-web steel pad; 38-flange plate. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of this application, it should be noted that the terms "upper" and "lower" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product is usually placed when in use. These are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0032] like Figure 1 and Figure 2 As shown, the present invention provides a multifunctional high-pressure pipeline full-scale model internal pressure test loading system, which includes a reaction column 1, N synchronous jacks 2, and N loading modules 3. The cross-section of the reaction column 1 is a regular N-gonal ring, located at the center of the high-pressure pipeline 4 to be tested. Obviously, the two must be arranged coaxially to achieve a standardized test effect. The regular N-gonal ring cross-sectional structure of the reaction column 1 has N outer side surfaces, forming N radial paths between it and the inner wall of the high-pressure pipeline 4, and a synchronous jack 2 and a loading module 3 are arranged on each radial path.

[0033] Among them, one end of the force-applying direction of each synchronous jack 2 is connected to an outer side surface of the reaction pier 1, and the other end is connected to one end of a loading module 3; the other end of the loading module 3 faces the inner wall of the high-pressure pipeline 4; the loading system performs a loading test by applying a radial load to the loading module 3 and transferring it to the high-pressure pipeline 4.

[0034] In the present invention, the high-pressure pipe 4 refers to a pressure pipe that is subjected to high internal water pressure.

[0035] In the present invention, a full-scale model refers to an experimental model made according to the actual size, material and process of an actual component, which is used to simulate performance testing and analysis under real working conditions.

[0036] According to the above structure, the test process method of the present invention is as follows:

[0037] 1) Complete the processing of the reaction column 1 and the loading module 3;

[0038] 2) Connect the inner flange 21 and outer flange 22 of the synchronous jack 2 to the reaction column 1 and the loading module 3 respectively;

[0039] 3) Place the high-pressure pipe 4 and rubber sheet 5;

[0040] 4) Convert the internal water pressure and control the synchronous jack 2 to simulate uniform loading.

[0041] In the present invention, the synchronous jack 2 can be controlled by a synchronous system to achieve adjustment of different force modes and also to achieve the effect of asymmetric loads, thus having wider applicability.

[0042] In a further embodiment of the present invention, reference Figure 3 As shown, the reaction pier 1 includes N outer steel plates 11 and N inner steel plates 12. The N outer steel plates 11 are sequentially connected on the sides to form an outer ring of a regular N-polygonal ring, and the N inner steel plates 12 are sequentially connected on the sides to form an inner ring of a regular N-polygonal ring. Obviously, the outer ring and the inner ring are concentric. The outer ring and the inner ring of the present invention are connected by a honeycomb steel 14 and poured with concrete 13. Specifically, the outer wall surface of an inner steel plate 12 and the inner wall surface of an outer steel plate 11 are connected by a honeycomb steel 14. Through this connection structure, the reaction pier 1 has sufficient rigidity and toughness to bear the test pressure. Honeycomb steel avoids the casting voids that may be caused by traditional steel skeletons, improves density, and at the same time can reduce the amount of steel used and reduce material costs.

[0043] Furthermore, a steel mesh consisting of circumferential steel bars 15 and radial stirrups 16 is provided on the inner side of the inner ring. Obviously, the number of radial stirrups 16 is preferably N, one for each inner steel plate 12. This steel mesh structure further enhances the ability of the reaction pier 1 to withstand the test pressure, effectively suppressing the occurrence of cracks.

[0044] Furthermore, the present invention also provides a specific connection form between the reaction column 1 and the synchronous jack 2, that is, N connecting steel plates 6 are set on the outside of the reaction column 1, and connected to a synchronous jack 2 through each connecting steel plate 6. Specifically, one end of a connecting steel plate 6 is welded to the outer wall surface of an outer steel plate 11, and a flange plate 7 is welded to the other end. Each flange plate 7 is connected to one end of the synchronous jack 2 in the force application direction by a high-strength bolt 8. At this time, an inner flange 21 can be set at one end of the synchronous jack 2 in the force application direction, such as Figure 4 As shown, each flange plate 7 is connected to an inner flange plate 21 by a high-strength bolt 8, as shown in FIG. Figure 5 Through this structure, the reaction column 1 and the synchronous jack 2 can be reliably connected and assembled, ensuring the force effect of the synchronous jack 2.

[0045] In a further embodiment of the present invention, reference Figure 6 As shown, the loading module 3 includes a double-web steel loading plate 31, which includes an inner flange 32, an outer curved flange 34, and two webs 33. Several stiffening ribs 35 are provided between the two webs 33, and several shoe plates 36 are provided on the inner wall of the outer curved flange 34. The stiffening ribs 35 enhance the rigidity of the double-web steel loading plate 31, while the shoe plates 36 enhance the compressive strength of the outer curved flange 34 and further ensure uniform pressure. The shoe plates 36 can be distributed on the outer sides of the two webs 33 and can contact or be welded to adjacent webs 33. The inner flange 32 is connected to the other end of a synchronous jack 2 in the direction of force application, and the outer wall of the outer curved flange 34 is directly or indirectly bonded to the inner wall of the high-pressure pipeline 4. Specifically, the other end of the synchronous jack 2 of the present invention is provided with an outer flange 22 in the direction of force application, and the inner flange 32 is provided with bolt holes 9 corresponding to the outer flange 22. The inner flange 32 of the loading module 3 is connected to the outer flange 22 through high-strength bolts 10 and the bolt holes 9. Figure 7 The indirect bonding refers to setting a rubber sheet 5 between the outer arc-shaped flange 34 and the inner wall of the high-pressure pipe 4. The rubber sheet 5 is bonded together. The rubber sheet 5 has elasticity and is used to transfer load to the high-pressure pipe 4, which can play a buffering role.

[0046] Through this structure, the loading module 3 and the synchronous jack 2 can be reliably connected and assembled, thereby ensuring the force application effect of the synchronous jack 2.

[0047] Furthermore, in order to meet the test requirements of high-pressure pipes 4 with different inner diameters, the loading module 3 of the present invention can be radially expanded. Figure 7As shown, the loading module 3 now also includes several double-web steel pads 37. The inner flange 32 of the loading module 3 is not directly connected to the other end of the synchronous jack 2 in the force-applying direction, but is instead connected via the double-web steel pads 37. Within a loading module 3, the double-web steel pads 37 are radially connected in series. Selecting a different number of double-web steel pads 37 allows for adjustment of radial dimensions to accommodate high-pressure pipes 4 with varying inner diameters. The structure of the double-web steel pads 37 is similar to that of the double-web steel loading plate 31, differing in that the radial flanges at both ends do not need to be curved. Bolt holes 9 are provided on the innermost flange 38 for connection to the outer flange 22. Bolt holes 9 are also provided on the outermost flange for connection to the inner flange 32 of the double-web steel loading plate 31. It also has two webs 33, with several stiffening ribs 35 arranged between the two webs 33. In this structure, the double-web steel pad 37 and the synchronous jack 2, the adjacent double-web steel pads 37, and the double-web steel pad 37 and the double-web steel loading plate 31 are all connected by high-strength bolts 10.

[0048] In a further embodiment of the present invention, multiple synchronous jacks 2 in the same radial direction can be provided along the axial direction and evenly distributed to improve the force loading effect.

[0049] This invention uses equivalent loads to simulate different operating conditions of high-pressure pipelines, enabling research on the stress mechanisms of full-scale models throughout the entire loading process, improving the quality and efficiency of high-pressure pipeline prototype testing. The loading module can also include multiple double-web steel pads, connected by high-strength bolts, to accommodate pressure pipelines of varying sizes. This design offers advantages such as flexible design and wide applicability.

[0050] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A multifunctional high-pressure pipeline full-scale model internal pressure test loading system, characterized by: It comprises a reaction column (1), N synchronous jacks (2) and N loading modules (3); the cross section of the reaction column (1) is a regular N-sided ring; One end of each synchronous jack (2) in the force application direction is connected to an outer side surface of the reaction column (1), and the other end is connected to one end of a loading module (3); the other end of the loading module (3) faces the inner wall of the high-pressure pipeline (4); the loading system performs a loading test by applying a radial load to the loading module (3) and transmitting the load to the high-pressure pipeline (4).

2. The multifunctional high-pressure pipeline full-scale model internal pressure test loading system according to claim 1 is characterized in that: The reaction pier (1) comprises N outer steel plates (11) and N inner steel plates (12), wherein the N outer steel plates (11) are sequentially connected on the sides to form an outer ring of a regular N-polygonal ring, and the N inner steel plates (12) are sequentially connected on the sides to form an inner ring of the regular N-polygonal ring, and the outer ring and the inner ring are connected by honeycomb steel (14) and poured with concrete (13).

3. The multifunctional high-pressure pipeline full-scale model internal pressure test loading system according to claim 2 is characterized in that: A steel mesh consisting of annular steel bars (15) and radial stirrups (16) is arranged on the inner side of the inner ring.

4. The multifunctional high-pressure pipeline full-scale model internal pressure test loading system according to claim 2 or 3 is characterized in that: N connecting steel plates (6) are arranged on the outside of the reaction pier (1), one end of each connecting steel plate (6) is welded to the outer wall surface of the outer steel plate (11), and the other end is welded to a flange plate (7), and each flange plate (7) is connected to one end of the synchronous jack (2) in the force application direction through a high-strength bolt (8).

5. The multifunctional high-pressure pipeline full-scale model internal pressure test loading system according to claim 4 is characterized in that: An inner flange (21) is provided at one end of the synchronous jack (2) in the force application direction, and each flange plate (7) is connected to an inner flange (21) via a high-strength bolt (8).

6. The multifunctional high-pressure pipeline full-scale model internal pressure test loading system according to claim 1 is characterized in that: The loading module (3) includes a double-web steel loading plate (31), and the double-web steel loading plate (31) includes an inner flange (32), an outer arc-shaped flange (34) and two webs (33); a stiffening rib (35) is provided between the two webs (33), and a boot plate (36) is provided on the inner wall of the outer arc-shaped flange (34); the inner flange (32) is connected to the other end of the force application direction of one of the synchronous jacks (2), and the outer wall of the outer arc-shaped flange (34) is in contact with the inner wall of the high-pressure pipe (4).

7. The multifunctional high-pressure pipeline full-scale model internal pressure test loading system according to claim 6 is characterized in that: The loading module (3) further comprises a plurality of double-web steel pads (37), and the inner flange (32) is connected to the other end of the force application direction of a synchronous jack (2) through the plurality of double-web steel pads (37) connected in series along the radial direction, wherein the double-web steel pads (37) and the synchronous jack (2), the adjacent double-web steel pads (37), and the double-web steel pads (37) and the double-web steel loading plate (31) are all connected by high-strength bolts (10).

8. The multifunctional high-pressure pipeline full-scale model internal pressure test loading system according to claim 6 or 7, characterized in that: The outer arc-shaped flange (34) is fitted to the high-pressure pipe (4) via a rubber plate (5), and the load is transferred to the high-pressure pipe (4) via the rubber plate (5).

9. The multifunctional high-pressure pipeline full-scale model internal pressure test loading system according to claim 6 is characterized in that: An outer flange (22) is provided at the other end of the synchronous jack (2) in the force application direction, and the loading module (3) is connected to the outer flange (22) via a second high-strength bolt (10).

10. The multifunctional high-pressure pipeline full-scale model internal pressure test loading system according to claim 1 is characterized in that: A plurality of synchronous jacks (2) in the same radial direction are arranged along the axial direction.

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