Testing device for testing performance of underground pipeline joint

Abstract

The utility model provides a testing device for testing the performance of an underground pipeline joint, and relates to the technical field of underground pipeline performance testing. The test device can simulate the complex stratum condition below the underground pipeline and the joint through the spring set device, simulate the special conditions such as geological defects which are not beneficial to the stress of the underground pipeline and the joint, and test the mechanical properties of the joint under the conditions; the device has a flexibly configured test environment, and comprises a load transfer frame which can be adjusted into different types according to different requirements of load types and distribution, a geotechnical material which can be adjusted according to stratum attributes of test requirements, and the attributes of the stratum below the pipeline can be adjusted by adjusting the elastic coefficient and the arrangement position of springs in the spring group device.

Description

Technical Field

[0001] This utility model relates to the field of underground pipeline performance testing technology, specifically to a testing device for testing the performance of underground pipeline joints. Background Technology

[0002] With the rapid development of industrialization and urbanization, the demand for urban underground infrastructure construction has increased dramatically. As an important component of the city's lifeline, the safe operation of underground pipelines is particularly important. Underground pipelines mainly consist of pipe sections and pipe joints, and the sealing and pressure resistance performance of the pipe joints directly affects the safety and reliability of the entire pipeline system.

[0003] Currently, during the installation and maintenance of underground pipelines, the quality of pipe joints often fluctuates due to differences in construction techniques and materials, which can lead to serious problems such as leaks or pipe ruptures. Patent application CN114705566A provides a testing device and method for the mechanical properties of underground pipe joints. This device can comprehensively test the torsional, tensile, compressive, and bending mechanical properties of pipelines. However, this testing device can only perform tests under specific conditions, does not consider the interaction between the pipe and the soil, lacks versatility and flexibility for simulating complex underground environments, and cannot simulate the deformation of underground pipelines under real stress conditions. Therefore, developing a testing device capable of evaluating the performance of underground pipe joints under complex geological conditions is particularly urgent. To this end, there is an urgent need for a testing device for underground pipe joint performance that can simulate complex geological conditions beneath the pipeline, simulate special situations such as geological defects that are unfavorable to the stress on underground pipelines and joints, simulate the real load transfer process when the pipeline is covered by soil and rock with different properties, and test the mechanical properties of the pipe joints under these conditions. The testing device should have a flexibly configurable testing environment, including variable loads and geological properties, to provide more scientific data support and theoretical basis for the design and construction of underground pipelines. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a testing device for testing the performance of underground pipe joints, solving the problem that the performance test of underground pipe joints cannot simulate the deformation of underground pipes under real stress conditions.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A test apparatus for testing the performance of underground pipe joints, the test apparatus comprising: a test chamber, a spring assembly, a load transfer frame, and a measuring component;

[0007] The spring assembly includes: a top plate, a spring, a slider, and a slide rail;

[0008] The top plate is fixed to the top of the spring, the slider is fixed to the bottom of the spring, and the slider is slidably connected to the slide rail;

[0009] The bottom of the test chamber is equipped with several sliding rails, the top plate is covered with dense non-woven fabric, the soil and rock material is placed on the non-woven fabric, and the underground pipe with joints is buried in the soil and rock material.

[0010] A crossbeam is mounted on top of the test chamber, and a load transfer frame is connected to the bottom of the crossbeam via jacks.

[0011] The measurement components include: a soil pressure cell sensor and a fiber optic sensor;

[0012] The earth pressure cell sensor is embedded in the soil and rock material;

[0013] The inner wall of the underground pipeline has several receiving slots, and the fiber optic sensor is installed in the receiving slot.

[0014] Preferably, the test chamber includes: steel beams, steel columns, steel frame, tempered glass, and steel plates;

[0015] The steel beams and columns are welded to form the frame of the test chamber. The sides and bottom of the frame are reinforced with welded steel frames. Steel plates are installed on the left and right sides of the frame, and tempered glass is installed on the front and back sides.

[0016] Preferably, the crossbeam is mounted above the test chamber via a bracket.

[0017] Preferably, the load transfer frame includes: a first I-beam.

[0018] Preferably, the load transfer frame includes: a first I-beam and a plurality of second I-beams;

[0019] The first I-beam is installed at the bottom of the crossbeam using jacks. The second I-beam is perpendicular to the extension direction of the first I-beam and is placed on top of the soil and rock material.

[0020] Preferably, the load transfer frame includes: a first I-beam, a load plate, and a plurality of second I-beams;

[0021] The first I-beam is installed at the bottom of the crossbeam by jacks. The second I-beam is perpendicular to the extension direction of the first I-beam. The load plate is placed on top of the soil material, and the second I-beam is installed on top of the load plate.

[0022] This invention provides a testing device for testing the performance of underground pipe joints. Compared with the prior art, it has the following advantages:

[0023] In this invention, the test device can simulate complex geological conditions beneath underground pipelines and joints through a spring assembly, and simulate special conditions such as geological defects that are unfavorable to the stress on underground pipelines and joints, and test the mechanical properties of the joints under these conditions; it has a flexibly configurable test environment, including a load transfer frame that can be adjusted to different types according to different needs of load type and distribution, soil and rock materials that can be adjusted according to the geological properties of the test requirements, and the properties of the geological strata beneath the pipeline can be adjusted by adjusting the elastic coefficient and arrangement position of the springs in the spring assembly. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an isometric view of the test apparatus in Embodiment 1 of this utility model;

[0026] Figure 2 This is a front view of the test apparatus in Embodiment 1 of this utility model;

[0027] Figure 3 This is a side view of the test apparatus in Embodiment 1 of this utility model;

[0028] Figure 4 This is a top view of the test apparatus in Embodiment 1 of this utility model;

[0029] Figure 5 This is a partial exploded view of the spring assembly device in Embodiment 1 of this utility model;

[0030] Figure 6 This is a schematic diagram of the spring assembly device in Embodiment 1 of this utility model;

[0031] Figure 7 This is a schematic diagram of the underground pipe and joint in Embodiment 1 of this utility model;

[0032] Figure 8 This is a schematic diagram of the load transfer frame in Embodiment 1 of this utility model;

[0033] Figure 9 This is a schematic diagram of the load transfer frame in Embodiment 2 of this utility model;

[0034] Figure 10 This is a schematic diagram of the load transfer frame in Embodiment 3 of this utility model;

[0035] The reference numerals in the figure are as follows: 1. Earth pressure cell sensor; 2. Connector; 3. Underground pipe; 4. Tempered glass; 5. Spring assembly; 5. Top plate; 51. Spring; 52. Slider; 53. Slide rail; 54. Crossbeam; 6. Jack; 7. Load transfer frame; 8. Support; 9. Steel beam; 10. Steel column; 11. Steel frame; 12. Steel plate; 13. Non-woven fabric; 14. Receiving groove; 15. Fiber optic sensor; 16. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] This application provides a test device for testing the performance of underground pipe joints, which solves the problem that the performance test of underground pipe joints cannot simulate the deformation of underground pipes under real stress conditions.

[0038] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0039] Example 1:

[0040] like Figures 1 to 8 As shown, this utility model provides a test device for testing the performance of underground pipe joints. The test device includes: a test chamber, a spring assembly 5, a load transfer frame 8, and a measuring component.

[0041] The spring assembly 5 includes: a top plate 51, a spring 52, a slider 53, and a slide rail 54;

[0042] The top plate 51 is fixed to the top of the spring 52, the slider 53 is fixed to the bottom of the spring 52, and the slider 53 is slidably connected to the slide rail 54;

[0043] The bottom of the test chamber is equipped with several slide rails 54, and a dense non-woven fabric 14 is laid on the top plate 51. The soil and rock material is placed on top of the non-woven fabric 14, and the underground pipe 3 with the joint 2 is buried in the soil and rock material.

[0044] A crossbeam 6 is mounted on top of the test chamber, and the bottom of the crossbeam 6 is connected to a load transfer frame 8 via a jack 7.

[0045] The measurement components include: earth pressure cell sensor 1 and fiber optic sensor 16;

[0046] The earth pressure cell sensor 1 is embedded in the soil material and is used to detect the pressure transmission when the jack 7 is loaded.

[0047] The inner wall of the underground pipeline 3 is provided with several receiving grooves 15. The fiber optic sensor 16 is installed in the receiving grooves 15 to measure the deformation of the joint 2 under load.

[0048] like Figures 1-4 As shown, the test chamber includes: steel beam 10, steel column 11, steel frame 12, tempered glass 4, and steel plate 13;

[0049] The steel beams 10 and steel columns 11 are welded to form the frame of the test chamber. The sides and bottom of the frame are reinforced with steel frames 12. Steel plates 13 are installed on the left and right sides of the frame, and tempered glass 4 is installed on the front and back sides to facilitate observation of the interior of the test chamber.

[0050] like Figures 1-4 As shown, the crossbeam 6 is mounted above the test chamber via the bracket 9.

[0051] like Figure 1 , Figure 2 , Figure 3 , Figure 8 As shown, the load transfer frame 8 includes: a first I-beam;

[0052] The first I-beam is installed at the bottom of the crossbeam 6 by jack 7.

[0053] Example 2:

[0054] like Figure 9 As shown, the load transfer frame 8 includes: a first I-beam and multiple second I-beams;

[0055] The first I-beam is installed at the bottom of the crossbeam 6 by jack 7. The extension direction of the second I-beam is perpendicular to that of the first I-beam, and the second I-beam is placed on top of the soil material.

[0056] Example 3:

[0057] like Figure 10 As shown, the load transfer frame 8 includes: a first I-beam, a load plate, and multiple second I-beams;

[0058] The first I-beam is installed at the bottom of the crossbeam 6 by jack 7. The extension direction of the second I-beam is perpendicular to that of the first I-beam. The load plate is placed on top of the soil material, and the second I-beam is installed on top of the load plate.

[0059] Example 4:

[0060] The test method of the test apparatus includes the following steps:

[0061] S1. Select springs 52 with various elastic coefficients. According to the experimental design requirements, install the springs 52 with the specified elastic coefficients at the specified positions on the slide rail 54 via the slider 53. Install the slide rail 54 with the springs 52 assembled at the specified positions at the bottom of the test chamber.

[0062] S2. Lay a dense non-woven fabric 14 on top of the top sheet 51, place the underground pipe 3 with the joint 2 on the non-woven fabric 14, and adjust the underground pipe 3 to the experimental design position to match the position of the spring assembly device 5.

[0063] S3. The prepared soil and rock materials are injected in layers into the test chamber which is pre-coated with lubricating grease, and the soil pressure cell sensor 1 is set at the predetermined position.

[0064] S4. After the backfilling is completed, load transfer frame 8 is arranged on top of the soil and rock material according to the required load distribution pattern.

[0065] S5. Start jack 7 to preload and compact the soil and rock material in the test chamber, and check that all monitoring instruments are operating normally. After the check is completed, unload the load.

[0066] S6. Start the test by jacking 7. Continue to push and read the monitoring data of earth pressure cell sensor 1 and fiber optic sensor 16 throughout the process until joint 2 is damaged. This round of test ends.

[0067] S7. Adjust the combination type and arrangement position of the spring group device 5 with different elastic coefficients, and repeat S1 to S6 to obtain the performance data of the underground pipe joint 2 under various complex geological conditions.

[0068] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0069] 1. In this embodiment of the utility model, the test device can simulate the complex geological conditions below the underground pipeline 3 and the joint 2 through the spring assembly device 5, simulate special conditions such as geological defects that are not conducive to the stress on the underground pipeline 3 and the joint 2, and test the mechanical properties of the joint 2 under these conditions.

[0070] 2. In this embodiment of the utility model, the test device has a flexibly configurable test environment, including a load transfer frame 8 that can be adjusted to different types according to different requirements of load type and distribution, a soil and rock material that can be adjusted according to the geological properties of the test requirements, and the properties of the geological stratum below the pipeline can be adjusted by adjusting the elastic coefficient and arrangement position of the springs 52 in the spring assembly device 5.

[0071] 3. In this embodiment of the present invention, the test device can simulate the real load transfer process when the pipeline is covered with soil and rock of different properties, taking into account the interaction between the pipe and the soil.

[0072] 4. In this embodiment of the utility model, the test device has the characteristics of being realistic and comprehensive in simulating and studying the performance of underground pipeline joints, and can provide strong support for the design of various parameters of underground pipelines and joints.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0074] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A test apparatus for testing the performance of underground pipe joints, characterized in that, The test apparatus includes: a test chamber, a spring assembly (5), a load transfer frame (8), and a measuring component; The spring assembly (5) includes: a top plate (51), a spring (52), a slider (53), and a slide rail (54); The top plate (51) is fixed to the top of the spring (52), the slider (53) is fixed to the bottom of the spring (52), and the slider (53) is slidably connected to the slide rail (54); The test chamber is equipped with several slide rails (54) at the bottom, and a dense non-woven fabric (14) is laid on the top plate (51). The soil and rock material is placed on the non-woven fabric (14), and the underground pipe (3) with the joint (2) is buried in the soil and rock material. A crossbeam (6) is mounted on top of the test chamber, and the bottom of the crossbeam (6) is connected to the load transfer frame (8) via a jack (7); The measurement components include: a soil pressure cell sensor (1) and a fiber optic sensor (16); The earth pressure cell sensor (1) is embedded in the soil material; The inner wall of the underground pipeline (3) is provided with several receiving slots (15), and the fiber optic sensor (16) is installed in the receiving slots (15).

2. The test apparatus for testing the performance of underground pipeline joints as described in claim 1, characterized in that, The test chamber includes: steel beams (10), steel columns (11), steel frame (12), tempered glass (4), and steel plate (13); The steel beams (10) and steel columns (11) are welded to form the frame of the test chamber. The sides and bottom of the frame are reinforced with steel frames (12). Steel plates (13) are installed on the left and right sides of the frame, and tempered glass (4) is installed on the front and back sides.

3. The test apparatus for testing the performance of underground pipeline joints as described in claim 1, characterized in that, The crossbeam (6) is mounted above the test chamber via a bracket (9).

4. The test apparatus for testing the performance of underground pipeline joints as described in claim 1, characterized in that, The load transfer frame (8) includes: a first I-beam; The first I-beam is installed at the bottom of the crossbeam (6) by a jack (7).

5. The test apparatus for testing the performance of underground pipeline joints as described in claim 1, characterized in that, The load transfer frame (8) includes: a first I-beam and multiple second I-beams; The first I-beam is installed at the bottom of the crossbeam (6) by a jack (7), and the second I-beam is perpendicular to the extension direction of the first I-beam. The second I-beam is placed on top of the soil and rock material.

6. The test apparatus for testing the performance of underground pipeline joints as described in claim 1, characterized in that, The load transfer frame (8) includes: a first I-beam, a load plate, and multiple second I-beams; The first I-beam is installed at the bottom of the crossbeam (6) by a jack (7), the second I-beam is perpendicular to the extension direction of the first I-beam, the load plate is placed on top of the soil material, and the second I-beam is installed on top of the load plate.

Images