Test device and method for simulating forces on underground pipelines

Abstract

The application discloses a test device and a method for simulating stress of an underground pipeline. The test device comprises a loading mechanism and a foundation simulation mechanism. The foundation simulation mechanism comprises a plurality of supporting assemblies arranged at intervals, which are used for supporting a test pipeline and horizontally placing the test pipeline. The loading mechanism comprises a force applying part used for abutting against an upper surface of the test pipeline. The loading mechanism is used for applying a preset pressure to the test pipeline so that the supporting assemblies are compressed in the height direction. The application simulates the stress of the test pipeline at the loading mechanism by arranging the loading mechanism above the test pipeline. The compression of each supporting assembly can simulate the deformation of the underground pipeline caused by uneven stress underground, so that technicians can prevent the deformation of the underground pipeline during installation of the underground pipeline, and leakage caused by uneven stress of the underground pipeline is avoided.

Description

Technical Field

[0001] The present invention relates in particular to a test apparatus and a method for simulating stress on underground pipelines. Background Technology

[0002] Underground pipelines are prone to deformation due to uneven stress, leading to ruptures and leaks. This not only prevents the pipelines from functioning properly but also significantly disrupts the daily lives of urban residents. When one part of an underground pipeline is subjected to stress, other parts will also deform. Because the deformation of underground pipelines under uneven stress cannot be directly observed, it is impossible to implement corresponding solutions based on the actual deformation of the pipeline underground. Therefore, a testing device that can simulate the deformation of underground pipelines under stress is needed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defect in the prior art that it is impossible to directly observe the deformation of underground pipelines caused by uneven local stress underground, and to provide a test device and a method for simulating the stress of underground pipelines.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] This invention provides a testing device for simulating the stress on underground pipelines. The testing device includes a loading mechanism and a foundation simulation mechanism.

[0006] The foundation simulation mechanism includes multiple spaced-apart support components, which are used to support the test pipe and place the test pipe horizontally.

[0007] The loading mechanism includes a force-applying part, which is used to abut against the upper surface of the test pipe. The loading mechanism is used to apply a preset pressure to the test pipe so that the support assembly is compressed in the height direction.

[0008] In this scheme, the above-described structure is used. By setting a loading mechanism above the test pipe, the stress situation of the test pipe at the loading mechanism can be simulated. When the loading mechanism is activated, the upper end of the support component moves downward synchronously with the test pipe. The total amount of compression of the support component can reflect the degree of deformation of the test pipe when the loading mechanism applies force. Therefore, the cause of the pipe deformation can be easily found based on the pipe deformation.

[0009] Preferably, the support assembly includes a support member and an elastic component, the support member being connected above the elastic component, and the support member being able to displace in the height direction under the action of an external force.

[0010] In this design, the support can be displaced in the height direction, thereby simulating the downward movement of soil under stress.

[0011] Preferably, the elastic component includes a guide rod and a spring fitted on the guide rod; a guide hole extending upward is provided on the lower surface of the support member, the upper end of the guide rod extends into the guide hole and can slide up and down, the outer diameter of the spring is larger than the diameter of the through hole, the upper end of the spring is connected to the lower surface of the support member, and the lower end of the spring is connected to the guide rod.

[0012] In this scheme, the spring can fully simulate the deformation state of the foundation soil, thus making it easy to reflect the deformation of the test pipeline at that location, and can intuitively reflect the impact of the underground pipeline on the foundation soil when it is under stress.

[0013] Preferably, the test apparatus further includes a truss mechanism, and the foundation simulation mechanism is mounted on the truss mechanism.

[0014] Preferably, the truss mechanism includes a plurality of long rods arranged parallel to each other along a first direction, and each of the long rods is fixedly connected by a plurality of first connecting rods and a plurality of second connecting rods;

[0015] And / or, the truss mechanism is provided with a plurality of limiting members, and the plurality of limiting members are arranged one-to-one on opposite sides of the truss mechanism along the length direction of the truss mechanism, and the support assembly is slidably connected to the limiting members on the corresponding sides at both ends of the truss mechanism in the width direction.

[0016] In this solution, by setting limiting members on both sides of the support assembly, it is possible to prevent the support assembly from tilting off the side of the test pipe, thereby preventing the test pipe from falling off the support assembly.

[0017] Preferably, the underground pipeline loading stress simulation test device further includes a measuring component, which is used to measure the compression of the support component in the height direction.

[0018] In this scheme, by setting up a measuring component, the actual data can reflect the amount of compression of the support component, which can more intuitively reflect the deformation of the test pipeline, and at the same time facilitate the statistical analysis of the causes of deformation of underground pipelines.

[0019] Preferably, the measuring component includes:

[0020] A scale bar, which is mounted on the support assembly;

[0021] A pointer component, the pointer component including a pointer, the pointer being set to maintain a fixed height relative to the ground, the pointer pointing to the scale bar.

[0022] In this scheme, when the loading mechanism is activated, the scale bar and the support move down synchronously, so that the pointer can indicate the corresponding value on the scale bar, thereby intuitively reflecting the deformation of the test pipeline, and further reflecting the impact of the underground pipeline deformation on the soil, etc.

[0023] Preferably, the force-applying part is equipped with a pressure sensor for monitoring the pressure applied by the loading mechanism;

[0024] And / or, the test apparatus further includes a pressure pump for pumping liquid into the test pipeline;

[0025] And / or, the underground pipeline loading stress simulation test device further includes a limiting mechanism, which is disposed at both ends of the test pipeline to fix the test pipeline.

[0026] The present invention also provides a method for simulating the stress on underground pipelines, the method employing the testing apparatus described above, and the method comprising the following steps:

[0027] S1. Install the test pipeline on each of the support components of the foundation simulation mechanism and keep it horizontal;

[0028] S2. Install the loading mechanism above the test pipe;

[0029] S3. Activate the loading mechanism to apply a preset vertical downward pressure to the upper surface of the test pipe;

[0030] S4. Record the amount of compression of each of the support components.

[0031] In this scheme, when the loading mechanism is activated, the upper end of the support component moves downward synchronously with the test pipeline. The amount of compression of the support component can reflect the degree of deformation of the test pipeline when the loading mechanism applies force, thereby enabling intuitive monitoring of the impact of the force on the pipeline on the pipeline itself and the soil.

[0032] Preferably, a preset pressure is applied between any two adjacent support components;

[0033] Alternatively, a preset pressure may be applied directly above any of the support components;

[0034] Alternatively, the test conduit includes a first conduit and a second conduit connected by a conduit joint, the force-applying portion abutting against the upper surface of the conduit joint; the conduit joint is disposed between adjacent support assemblies.

[0035] The positive and progressive effects of this invention are as follows: By setting a loading mechanism above the test pipe, this invention can simulate the stress situation that occurs on the test pipe at the loading mechanism. The compression of each support component can simulate the deformation of underground pipes caused by uneven stress underground, thereby facilitating technicians to prevent deformation of underground pipes during installation and avoiding leaks caused by uneven stress. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the front view structure of the test device of the present invention.

[0037] Figure 2 This is a side view of the experimental apparatus of the present invention.

[0038] Figure 3 for Figure 1 Enlarged structural diagram at point A in the middle.

[0039] Figure 4 This is a schematic diagram of the support assembly of the present invention.

[0040] Figure 5 This is a schematic diagram of the measuring mechanism of the present invention.

[0041] Figure 6 This is a front view schematic diagram of the truss mechanism of the present invention.

[0042] Figure 7 This is a side view of the truss mechanism of the present invention.

[0043] Figure 8 This is a bottom view schematic diagram of the truss mechanism of the present invention.

[0044] Figure 9 This is a schematic diagram of the loading mechanism of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] Loading mechanism 1

[0047] Jack 110

[0048] Reaction frame 111

[0049] Foundation Simulation Mechanism 2

[0050] Support assembly 210

[0051] Support component 211

[0052] Elastic component 212

[0053] Guide rod 2121

[0054] Spring 2122

[0055] Guide hole 2123

[0056] Test pipe 3

[0057] Truss Mechanism 4

[0058] Long rod 410

[0059] First link 420

[0060] Second link 430

[0061] Third link 440

[0062] Limiting component 450

[0063] Measurement Component 5

[0064] Scale bar 510

[0065] Fixed rod 520

[0066] Pointer 521

[0067] 6 booster pumps

[0068] Limiting mechanism 7

[0069] Pipe joint 8

[0070] Water tank 9 Detailed Implementation

[0071] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0072] This embodiment provides a testing device for simulating the stress on underground pipelines, such as... Figures 1 to 9 As shown, the test apparatus includes a loading mechanism 1 and a foundation simulation mechanism 2. The foundation simulation mechanism 2 includes multiple spaced-apart support components 210, all with the same initial height. The support components 210 support the test pipe 3 and place it horizontally. The loading mechanism 1 includes a force-applying part that abuts against the upper surface of the test pipe 3. The loading mechanism 1 applies a downward preset pressure to the test pipe 3 to compress the support components 210 accordingly.

[0073] In this embodiment, the above-described structure is adopted. The foundation simulation mechanism 2 is used to simulate the foundation soil layer, and multiple support components 210 arranged at intervals are used to simulate part of the foundation soil below the test pipe 3. By setting a loading mechanism 1 above the test pipe 3, the stress situation of the test pipe 3 at the loading mechanism 1 is simulated. When the loading mechanism 1 is activated, the upper end of the support component 210 and the test pipe 3 are synchronously displaced downward under the action of external force, and the entire support component 210 will be compressed accordingly. The displacement of the test pipe 3 is used to indirectly simulate the deformation of the underground pipe caused by uneven stress underground. This makes it easier for technicians to prevent the deformation of the underground pipe during the installation of the underground pipe and avoid leakage caused by the deformation of the underground pipe due to uneven stress.

[0074] In other embodiments, the loading mechanism 1 may be configured in multiple ways to simulate the stress on multiple points of the test pipe 3.

[0075] The support assembly 210 includes a support member 211 and an elastic component 212. The support member 211 is positioned above the elastic component 212, and the elastic component 212 can displace in the height direction under the action of an external force. Figure 2 As shown, each support assembly 210 has two sets of elastic components 212, and both sets of elastic components 212 are installed below the support member 211. For example, Figure 4 As shown, the elastic component 212 includes a guide rod 2121 and a spring 2122 fitted onto the guide rod 2121. The upper end of the guide rod 2121 is configured to slide up and down within a guide hole 2123 opened in the support member 211. The outer diameter of the spring 2122 is larger than the diameter of the guide hole 2123. The upper end of the spring 2122 is connected to the support member 211, and the lower end of the spring 2122 is connected to the guide rod 2121. Triangular blocks may also be provided on the top of the support member 211, with the triangular blocks on both sides of the test pipe 3, to prevent the test pipe 3 from swaying or falling off the support member 211. In other embodiments, the top of the support member 211 may also be configured as an arc-shaped groove structure matching the shape of the test pipe 3.

[0076] After the loading mechanism 1 is activated, when the test pipe 3 moves downward under the force of the loading mechanism 1, the top of the spring 2122 moves downward along with the test pipe 3 and the support 211. The spring 2122 is compressed along the outer wall of the guide rod 2121, while the upper end of the guide rod 2121 moves upward along the guide hole 2123 opened in the support 211. The greater the force applied by the loading mechanism 1, the greater the displacement of the support 211, thus reflecting the deformation of the test pipe 3 at that location. The spring 2122 can fully simulate the deformation state of the foundation soil, thus facilitating the reflection of the deformation of the test pipe 3 at that location, and can intuitively simulate the impact of the underground pipe 3 on the underlying foundation soil when under stress.

[0077] In this embodiment, the test apparatus further includes a truss mechanism 4, with the foundation simulation mechanism 2 positioned above the truss mechanism 4. When the foundation simulation mechanism 2 deforms, the truss mechanism 4 remains rigid and does not deform. If the foundation simulation mechanism 2 is directly installed on the ground, under the same preset pressure, the support component 210 may experience different displacements due to variations in ground hardness at different locations, leading to measurement errors. In this embodiment, the truss mechanism 4 provides the same reaction force to the foundation simulation mechanism 2, maintaining the bottom of the foundation simulation mechanism 2 under the same stress environment. Therefore, when the same preset pressure is applied to any foundation simulation mechanism 2, the displacement at the support component 211 is the same, thus ensuring the testing accuracy of the test apparatus.

[0078] In this embodiment, the truss mechanism 4 specifically includes four long rods 410 arranged side by side in the horizontal direction. The four long rods 410 are fixedly connected by multiple vertically arranged first connecting rods 420 and multiple horizontally arranged second connecting rods 430. The long rods 410 are connected by the first connecting rods 420 and the second connecting rods 430 to form a stable cuboid structure. The foundation simulation mechanism 2 is installed on two long rods 410 at the upper end of the truss mechanism 4.

[0079] The truss mechanism 4 also includes multiple third links 440. One end of each third link 440 is connected to the first link 420, and the other end of the third link 440 is connected to the long rod 410. The third link 440, the first link 420 and the long rod 410 form a stable triangular structure, thereby improving the support stability of the truss mechanism 4.

[0080] The truss mechanism 4 is equipped with multiple limiting members 450, which are arranged one-to-one along the length of the truss mechanism 4 on opposite sides. The support assembly 210 is slidably connected to the corresponding limiting members 450 on both sides of the truss mechanism 4 in the width direction. The limiting members 450 can provide support force on both sides of the support assembly 210, preventing the support assembly 210 and the test pipe 3 from tilting along the axial direction of the test pipe 3, thereby improving the stability of the entire test device and ensuring the test accuracy of the test device.

[0081] The testing apparatus also includes a measuring component 5, which measures the displacement of the support 211 in the height direction synchronously with the test pipe 3. The measuring component includes a scale bar 510 and a pointer assembly; the scale bar 510 is mounted on the support component 210. By setting up the measuring component 5, the specific displacement of the support 211 can be reflected with actual data, providing a more intuitive indication of the deformation of the test pipe 3.

[0082] like Figure 5As shown, in this embodiment, the pointer assembly includes a pointer 521, which is set at a fixed height relative to the ground and points to the scale bar 510. The pointer assembly also includes a fixing rod 520, on which the pointer 521 is mounted. The scale bar 510 is mounted on the support assembly 210, and the pointer 521 points to the scale bar 510 to indicate the amount of compression of the support assembly 210. The fixing rod 520 can be mounted on the truss mechanism 4 to keep the fixing rod 520 and the pointer 521 fixed. The scale bar 510 is mounted on the support member 211 of the support assembly. When the loading mechanism 1 is activated, the scale bar 510 and the support member 211 move downwards synchronously, allowing the pointer 521 to indicate the corresponding value on the scale bar 510.

[0083] In other embodiments, the measuring component 5 may also employ an electronic measuring instrument capable of calculating the amount of compression of the support component 210 in real time.

[0084] like Figure 9 As shown, the loading mechanism 1 specifically includes a reaction frame 111 and a jack 110. The telescopic end of the jack 110 abuts against the surface of the test pipe 3, and the fixed end of the jack 110 is mounted on the reaction frame 111. The reaction frame 111 is mounted on the truss mechanism 4. The reaction frame 111 is used to mount the jack 110 on the truss mechanism 4. After the jack 110 is activated, its telescopic end abuts against the surface of the test pipe 3 to provide a preset pressure.

[0085] The force-applying part is equipped with a pressure sensor to monitor the pressure applied by the loading mechanism 1. By measuring the pressure value, it is easy to observe the correlation between the pressure value and the amount of compression of the support component 210, thereby facilitating the analysis of the influencing factors of underground pipeline deformation and providing a basis for further improvement in preventing underground pipeline damage.

[0086] The test apparatus also includes a pressure pump 6, which is used to pump liquid into the test pipe 3. One end of the pressure pump 6 is connected to the outlet of a water tank to guide the water stored in the tank into the test pipe 3. This structure effectively simulates the conditions of a normal underground pipeline, ensuring the realism of the simulation. Furthermore, the pressure pump 6 can adjust the liquid content in the test pipe 3, thereby enabling monitoring of the deformation of the test pipe 3 under different operating conditions.

[0087] The testing apparatus also includes a limiting mechanism 7, which is installed at both ends of the test pipe 3 to fix the test pipe 3 and prevent it from shaking. In this embodiment, the limiting mechanism 7 is a steel frame structure, which is fixedly connected to the truss mechanism 4 to maintain the stability of the test pipe 3.

[0088] The present invention also provides a method for simulating the stress on underground pipelines. This method uses the test apparatus described above and specifically includes the following steps:

[0089] S1. Install a test pipe 3 on each support component 210 of the foundation simulation mechanism 2 and keep it horizontal;

[0090] S2. Install the loading mechanism 1 above the test pipe 3 and introduce liquid into the test pipe 3 to simulate the normal working state of the test pipe 3. When the liquid content reaches the preset condition, stop the operation of the pressurized water pump 6 and maintain a constant internal pressure in the test pipe 3. At this time, adjust the measuring component 5 so that all pointers 521 point to the 0 mark on the scale bar 510.

[0091] S3. Start loading mechanism 1 to apply a preset vertical downward pressure to the upper surface of test pipe 3;

[0092] S4. Calculate and record the amount of compression of each support component 210, that is, calculate the difference in the change of pointer 521 on the scale bar 510.

[0093] Liquid is introduced into test pipe 3 to simulate the normal operation of an underground pipeline. By applying a preset pressure, the external stress on the underground pipeline can be simulated. The support component 210 can fully simulate the deformation state of the foundation soil, thus easily reflecting the deformation of test pipe 3 at that location and directly reflecting the impact of the underground pipeline 3 on the underlying foundation soil under stress. Simultaneously, the displacement of test pipe 3 indirectly simulates the deformation of the underground pipeline caused by uneven stress underground. This facilitates technicians in preventing deformation of the underground pipeline during installation, avoiding leaks caused by uneven stress.

[0094] The pointer 521 of the measuring component 5 initially indicates 0 on the scale bar 510. After pressure is applied, the pointer 521 will point to the corresponding value. The difference between the two values ​​is the compression amount of the support component 210. The data can intuitively reflect the deformation of the test pipe 3. Therefore, it is convenient to statistically analyze the causes of deformation of the underground pipe based on the data, and the impact of the deformation of the underground pipe can be analyzed based on the compression amount of the support component 210.

[0095] Specifically, in this embodiment, a preset pressure is applied between any two adjacent support components 210 to simulate the impact on the deformation of the underground pipeline and the soil when the stress point is set between adjacent supporting soil at the bottom of the underground pipeline.

[0096] In other embodiments, a preset pressure can be applied directly above any of the support components 210 to simulate the pipe deformation when the stress point of the pipe is located directly above the supporting soil.

[0097] In other embodiments, the test pipe 3 includes a first pipe and a second pipe connected by a pipe joint, with the force-applying part abutting against the upper surface of the pipe joint, which is disposed between adjacent support components 210.

[0098] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A testing apparatus for simulating the stress on underground pipelines, characterized in that, The test apparatus includes a loading mechanism and a foundation simulation mechanism; The foundation simulation mechanism includes multiple spaced-apart support components, which are used to support the test pipe and place the test pipe horizontally. The loading mechanism includes a force-applying part, which is used to abut against the upper surface of the test pipe. The loading mechanism is used to apply a preset pressure to the test pipe so that the support assembly is compressed in the height direction.

2. The test apparatus as described in claim 1, characterized in that: The support assembly includes a support member and an elastic component. The support member is connected above the elastic component and can be displaced in the height direction under the action of external force.

3. The test apparatus as described in claim 2, characterized in that: The elastic component includes a guide rod and a spring fitted on the guide rod; The lower surface of the support member has a guide hole extending towards the upper surface. The upper end of the guide rod extends into the guide hole and can slide up and down. The upper end of the spring is connected to the lower surface of the support member, and the lower end of the spring is connected to the guide rod.

4. The test apparatus as described in claim 1, characterized in that: The test apparatus also includes a truss mechanism, and the foundation simulation mechanism is mounted on the truss mechanism.

5. The test apparatus as described in claim 4, characterized in that: The truss mechanism includes a plurality of long bars arranged parallel to each other along a first direction, and each of the long bars is fixedly connected by a plurality of first links and a plurality of second links; And / or, the truss mechanism is provided with a plurality of limiting members, and the plurality of limiting members are arranged one-to-one on opposite sides of the truss mechanism along the length direction of the truss mechanism, and the support assembly is slidably connected to the limiting members on the corresponding sides at both ends of the truss mechanism in the width direction.

6. The test apparatus as described in claim 1, characterized in that: The testing apparatus also includes a measuring component for measuring the compression of the support assembly in the height direction.

7. The test apparatus as described in claim 6, characterized in that: The measurement component includes: A scale bar, which is mounted on the support assembly; A pointer component, the pointer component including a pointer, the pointer being set to maintain a fixed height relative to the ground, the pointer pointing to the scale bar.

8. The test apparatus as described in claim 1, characterized in that: The force-applying part is equipped with a pressure sensor for monitoring the pressure applied by the loading mechanism; And / or, the test apparatus further includes a pressure pump for pumping liquid into the test pipeline; And / or, the test apparatus further includes a limiting mechanism disposed at both axial ends of the test pipe for fixing the test pipe.

9. A method for simulating the stress on underground pipelines, characterized in that: The method employs the testing apparatus as described in any one of claims 1-8, and the method includes the following steps: S1. Install the test pipeline on each of the support components of the foundation simulation mechanism and keep it horizontal; S2. Install the loading mechanism above the test pipe; S3. Activate the loading mechanism to apply a preset vertical downward pressure to the upper surface of the test pipe; S4. Record the amount of compression of each of the support components.

10. The method as described in claim 9, characterized in that: Apply a preset pressure between any two adjacent support components; Alternatively, a preset pressure may be applied directly above any of the support components; Alternatively, the test conduit includes a first conduit and a second conduit connected by a conduit joint, the force-applying portion abutting against the upper surface of the conduit joint; the conduit joint is disposed between adjacent support assemblies.

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