CN210347310U - Combined loading test system for complex loads of deep sea pipeline - Google Patents
Combined loading test system for complex loads of deep sea pipeline Download PDFInfo
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- CN210347310U CN210347310U CN201920305551.7U CN201920305551U CN210347310U CN 210347310 U CN210347310 U CN 210347310U CN 201920305551 U CN201920305551 U CN 201920305551U CN 210347310 U CN210347310 U CN 210347310U
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Abstract
The utility model relates to a load test system is united to complicated load of deep sea pipeline for carry out the load to experimental pipe fitting, including cabin body main part, the cabin body supports the saddle, experimental connecting axle, the fixing device and the lateral vibration loading device of experimental pipe fitting, the lateral vibration loading device is including vibrating staple bolt or one of vibration contact, vibration servo hydraulic cylinder, vibration loading connecting rod and vibration loading connecting axle, wherein, vibration loading connecting rod and vibration staple bolt or vibration contact detachably fixed connection, apply vibration servo hydraulic cylinder's power in vibration loading connecting rod and then transmit vibration staple bolt or vibration contact through vibration loading connecting axle, the vibration staple bolt is used for being connected vibration loading connecting rod with experimental connecting axle. The utility model discloses can realize full-scale deep sea oil gas conveying system's dynamic characteristics simulation.
Description
Technical Field
The utility model relates to a loading test system is united to complicated load of deep sea pipeline.
Background
Deep sea oil and gas transmission pipelines are national lifeline projects, which play an important role in the exploitation of marine oil and gas resources and the development of national economy. The continuous supply and the safety guarantee of energy are important foundations of the economic sustainable development of China. The oil gas reserves in the deep sea of south China sea are abundant, but the environment is complex and changeable, and oil gas exploitation faces huge challenges. Ocean engineering equipment and high-tech ships are definitely proposed in the planning of 'Chinese manufacturing 2025' as one of ten major development fields, and the propulsion needs to be accelerated. And the strategy of strengthening the country of the ocean is implemented, high and new technical equipment related to ocean oil and gas resources is developed in a key way, and the energy safety is guaranteed.
The deep sea pipeline is used as a main transportation mode of oil and gas resources, and a key core technology related to design and construction needs to be solved urgently. The deep sea pipeline is in a complex environment, uncertain factors are many in the manufacturing, transporting, installing and service processes, and the generated defects become important factors causing damage and failure of the pipeline. Once the submarine pipeline is damaged, serious economic and environmental losses are brought, full-scale tests of pipeline material performance and local stability are required to be carried out, the ultimate bearing capacity of the submarine pipeline under complex sea conditions is researched by a model test method, a set of complete evaluation standard for calculating the ultimate bearing capacity of the submarine pipeline is established, the main failure mode and the failure mechanism of the pipeline are explored, the design and manufacture of the pipeline are optimized, and the development of marine engineering in China is accelerated. The utility model discloses an experiment of full-size deep water pipeline can be accomplished to test method to can effectively exert the combined action that the axial was drawn and is pressed, torsion, moment of flexure, lateral vibration and external pressure load, have leading level in the world, filled internal blank, realize the simulation of the most genuine submarine pipeline limit operation environment, check for the installation and the safety of china's ocean engineering field structure and provide experimental support and technological accumulation. The existing domestic and foreign deep sea pressure chamber composite loading test method has the following defects:
1. the existing deep water pressure cabin has single function, only tension, compression and torsion under the action of external hydraulic load are considered, combined loading of various loads in actual complex working conditions cannot be met, and the engineering application value is insufficient;
2. the vibration load is an important factor which must be considered in pipe laying operation and oil pipeline, a vibration test aiming at full-size pipe fittings is fresh at home and abroad, and the test method can provide more comprehensive test reference for comprehensively analyzing the mechanical property of the submarine pipeline;
3. the existing deep water pressure cabin (scale ratio) has single vibration load loading, and the lateral vibration load loading device loads lateral vibration force on a test pipe fitting, so that only simple point vibration loading is realized, and the loading of surface vibration and integral vibration load cannot be carried out, and complex sea conditions such as earthquake, tsunami and the like cannot be simulated.
The test device (such as patent application number: CN201110008538.3) in China creatively realizes the test of the full-size pipeline, but the test device is only applied singly by external load and cannot realize the combined action of multiple loads. The existing testing device in China (such as the patent application number: CN2016100646291) is a complex combined loading testing device for a scale-reduction deep-water submarine pipeline, realizes the combined action of axial tension and compression, vibration, torsion and external pressure loads of a scale-reduction pipeline test piece, but the device is a scale-reduction testing device, provides an approximate simulation result, has a certain difference with the actual sea condition of a deep-sea pipeline, and secondly, the vibration load on the testing device can only carry out point vibration loading, can not realize surface vibration loading and simulate the coupling effect of a buried pipeline.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a deep sea pipeline loading test system that multiple vibration loading mode can be realized to one set.
The technical scheme is as follows:
a combined loading test system for complex loads of deep sea pipelines is used for loading test pipes, the front ends of the test pipes are fixedly connected with a front end sealing flange, the rear ends of the test pipes are fixedly connected with a tail end sealing flange, the test system comprises a cabin body main body, a cabin body supporting saddle, a test connecting shaft, a test pipe fixing device and a lateral vibration loading device, and is characterized in that,
connecting the front end sealing flange and the tail end sealing flange with the test connecting shaft by using nuts respectively;
the lateral vibration loading device comprises a vibration hoop or a vibration contact, a vibration servo hydraulic oil cylinder, a vibration loading connecting rod and a vibration loading connecting shaft, wherein the vibration loading connecting rod is fixedly connected with the vibration hoop or the vibration contact in a detachable mode, the force of the vibration servo hydraulic oil cylinder is applied to the vibration loading connecting rod through the vibration loading connecting shaft and then transmitted to the vibration hoop or the vibration contact, and the vibration hoop is used for connecting the vibration loading connecting rod with the test connecting shaft.
The lateral vibration loading device can also comprise another set, namely a second set of vibration loading devices: this set of vibration loading device includes spherical spread groove, vibration loading connecting rod, vibration application of force pole and vibration loading ring, and experimental pipe fitting is fixed inside the pipe soil actuator cylinder during the use, and the vibration loading ring is used for tightly locking pipe soil actuator cylinder, spherical spread groove one end and vibration loading ring fixed connection, and vibration loading connecting rod, vibration application of force pole and vibration loading connecting rod detachably fixed connection are connected to the other end.
The test system also comprises other load loading devices: the device comprises a torsion loading device, an axial tension and compression loading device, a front-end static pressure bending moment loading device and a tail-end static pressure bending moment loading device.
Compared with the prior art at home and abroad, the utility model has the advantages that:
(1) the loading of the lateral vibration load of the deep sea pipeline is realized, the technical barrier is broken through, the simultaneous loading of the radial surface vibration or point vibration load is realized through the shock excitation device, the impact effect of falling objects on the pipeline can be quantitatively simulated, and the coupling vibration loading of the buried pipeline can be realized by combining the vibration hoop.
(2) The utility model discloses a complicated load loading test system of deep sea pipeline can really restore the operation environment of deep sea pipeline in installation and service period, and the various operating modes that the simulation probably appears provide technical support for design of deep water oil gas conveying system and installation.
Drawings
FIG. 1 overall layout of the test system
The reference numbers in the figures illustrate: 1-a hatch; 1-2-a torsion loading device; 1-3-rack connecting rod; 1-4-fastening bolts; 1-5-sealing ring; 1-6-exhaust valve; 1-7-accelerator sensor; 1-8-test tubes; 1-9-cabin body; 1-10-water injection valve; 1-11-tail end sealing flange; 1-12-a pressurization valve; 1-13-cabin tail; 1-14-temperature and humidity sensor; 1-15-tail end sealing device; 1-16-high temperature high pressure water outlet; 1-17-data acquisition wells; 1-18-tail end support saddle; 1-19-a drain valve; 1-20-static pressure bending moment loading oil cylinder; 1-21-heaters; 1-22-water tank; 1-23-water pump; 1-24-vibration loading device; 1-25-static pressure bending moment loading device; 1-26-front end support saddle; 1-27-front end sealing flange; 1-28-test connecting shaft; 1-29-high temperature and high pressure water inlet; 1-30-axial tension and compression loading device.
FIG. 2 shows a torsion loading device and an axial loading device at a hatch cover, (a) is a front view, and (b) is a left view
The reference numbers in the figures illustrate: 1-2-torsion loading swing bidirectional oil cylinder; 1-3-rack connecting rod; 1-30-axial tension and compression loading oil cylinder; 2-1-water pressure equalizing pipe; 2-axial force loading hydraulic outward extending piston rods; 2-3-axial force loading hydraulic connector; and 2-4, axially pulling and pressing the loading hydraulic oil cylinder.
FIG. 3 shows a first state of use of the first set of vibration applying means
The reference numbers in the figures illustrate: 3-1-vibrating hoop; 3-2-vibrating connecting rod; 3-vibration connecting shaft; 3-4-vibration servo hydraulic oil cylinder; 3-5-acceleration sensor; 3-6, installing a hoop on the acceleration sensor; 1-8-test pipe fitting
FIG. 4 illustrates a second state of use of the first set of vibration applying means
The reference numbers in the figures illustrate: 4-1-vibrating contact; 3-2-vibrating connecting rod; 3-vibration connecting shaft; 3-4-vibration servo hydraulic oil cylinder; 3-5-acceleration sensor; 1-8-test pipe fitting
FIG. 5 is a side view of a buried pipeline for simulating seismic loads by using a second set of vibration loading device
The reference numbers in the figures illustrate: 5-1-spherical connecting groove; 5-2-vibration loading rod; 5-3-vibration force application rod; 5-4-soil body in the pipe; 5-pipe soil actuating cylinder; 5-6-conveying oil (water) at high temperature in the pipe body; 5-7-vibration loading ring; 1-8-test tubes.
Detailed Description
The submarine pipeline can meet various complex working conditions during installation and service, and is subjected to the combined action of complex loads, so that the limit bearing capacity of the submarine pipeline under a real working condition environment is simulated for realizing the test of a full-size pipe under the combined action of the complex loads, and meanwhile, reliable technical data and effective experience accumulation are provided for engineering practice. The method considers the vibration load caused by complex sea conditions such as earthquake, tsunami and the like, and provides a complex load combined loading test method for the submarine pipeline. This patent not only can be close to real simulation deep sea complex load operating mode, can also be selective carry out the joint action of single or more loads, the local stability and the atress condition of comprehensive analysis submarine pipeline. The embodiments of the present invention will be further described with reference to the accompanying drawings:
the utility model discloses a loading test system is united to complicated load of deep sea pipeline, be used for experimental pipe fitting 1-8 external pressure water pressure loading including cabin body main part 1-9, cabin body support saddle (1-26 and 1-18) guarantee that test system is stable, is provided with data acquisition hole 1-17, discharge valve 1-6, water injection valve 1-10, forcing valve 1-12, drain valve 1-19 on cabin body main part 1-9, is provided with the fixing device of experimental pipe fitting 1-8 in cabin body main part 1-9: the rear end welding tail end sealing flange 1-11 of the test pipe fitting 1-8 is connected with the tail part 1-13 of the cabin body through a nut, the front end welding front end sealing flange 1-27 is connected with the test connecting shaft 1-28 through a nut, and the end face is tightly attached to the annular radial sealing device. The test system also comprises four load loading devices: the torsion loading device 1-2 and the axial tension and compression loading device 1-30 are positioned on the hatch cover 1-1; a front static pressure bending moment loading device 1-20 and a tail static pressure bending moment loading device 1-25; a lateral vibration loading device;
the lateral vibration loading device comprises two sets of vibration loading devices, wherein the first set of vibration loading devices 1-24 is shown in figures 3 and 4, and the second set of vibration loading devices is shown in figure 5.
The first set of vibration loading device 1-24 comprises a vibration hoop 3-1, a vibration servo hydraulic oil cylinder 3-4, a vibration loading connecting rod 3-2, a vibration loading connecting shaft 3-3, an acceleration sensor 3-5, an acceleration sensor mounting hoop 3-6 and a vibration contact 4-1. The vibration loading connecting rod 3-2 and the vibration hoop 3-1 are fixedly connected (detachable) through screws, and the force of the vibration servo hydraulic oil cylinder 3-4 is applied to the vibration loading connecting rod 3-2 through the vibration loading connecting shaft 3-3 during testing so as to be transmitted to the vibration hoop 3-1. The vibration loading connecting shaft 3-3 has the function of adjusting the force application.
The first set of vibration loading device has two loading forms:
1) and (5) simulating a vibration fatigue test. The test pipe fittings 1-8 are tightly locked by using the vibration hoop 3-1, the deep water environment is simulated by injecting water and pressurizing in the cabin body, the vibration servo hydraulic oil cylinder 3-4 is started to apply random loads or regular loads such as sine and cosine loads, the load loading of the test pipe fittings 1-8 with different vibration frequencies is carried out by adjusting the vibration loading connecting shaft 3-3, and the fatigue vibration test is completed.
2) And (5) simulating a falling object impact test. The vibration contact 4-1 is used for replacing a vibration hoop 3-1, so that the vibration contact 4-1 and the test pipe fitting 1-8 are directly applied with point and surface vibration loads to simulate falling object impact, and the falling object conditions with different heights can be simulated by adjusting the magnitude of the applied force through the vibration loading connecting shaft 3-3.
The second set of vibration loading device comprises a spherical connecting groove 5-1, a vibration loading connecting rod 3-2, a vibration force application rod 5-2 and a vibration loading ring 5-6. When extreme sea conditions such as earthquakes and tsunamis are simulated, particularly earthquake loads of buried pipelines, operations as shown in figure 5 are needed. The test subjects were: the test pipe fittings 1-8 are arranged in the pipe-soil actuating cylinders 5-4 with soil bodies 5-3 made of different materials. The pipe soil actuating cylinder 5-4 is locked by the vibration loading ring 5-6, so that the soil 5-3 is prevented from scattering in the test process. One end of the spherical connecting groove 5-1 is welded on the vibration loading ring 5-6, and the other end is connected with the vibration loading connecting rod 3-2. The vibration force application rod 5-2 and the vibration loading connecting rod 3-2 are fixedly connected (detachable) by screws. When the test is started, other holes are closed, water is injected into the cabin body only through the water injection holes, standing is carried out for a period of time after the water injection is finished, after the soil body 5-3 in the test pipe fitting is in a saturated water state, the vibration servo hydraulic oil cylinder 3-4 is started, different types of earthquake loads are applied, and the whole test object (the test pipe fitting 1-8, the soil body 5-3 in the pipe and the pipe soil actuating cylinder 5-4) is driven to move through the vibration force application rod 5-2 to complete the test. In order to truly simulate the submarine pipeline in actual service, high-temperature oil or water 5-5 is conveyed inside the test pipe fittings 1-8.
Care was taken during the test:
1) test pipe fitting installation
Cutting a test pipe fitting 1-8 to a specified length, respectively welding a tail end sealing flange 1-11 and a front end sealing flange 1-27 at the front end and the rear end of the test pipe fitting 1-8 so as to be connected with a test system through a test connecting shaft 1-28, tightly locking the test pipe fitting 1-8 by a vibration hoop 3-1, mounting a plurality of accelerator sensors 1-7 on the test pipe fitting, then feeding the test pipe fitting 1-8 into a cabin 1-9, respectively connecting the front end sealing flange 1-26 and the tail end sealing flange 1-11 with the test connecting shaft 1-28 by nuts, and enabling the end face to be tightly attached to an annular radial sealing device. And starting the device to fix the test pipe fittings 1-8 in the cabin body, opening the automatic end cover opening and closing device through the hydraulic loading pump station, closing the cabin cover 1-1, and carrying out sealing treatment.
2) Water and air tightness test
Before the experiment, the water tightness and the air tightness of the cabin body need to be detected, and the safe operation of the experiment is ensured. And (2) performing low-pressure water injection operation in the main cabin body, closing drain valves 1-18 and pressure valves 1-12 on the main cabin body, opening exhaust valves 1-6, injecting water into the cabin through water injection valves 1-10, and closing the exhaust valves 1-6 and the water injection valves 1-10 in sequence after uniform water flow is discharged from the exhaust valves 1-6 to ensure that the cabin is filled with water.
3) Cabin body watertight pressurization
In order to simulate the actual working environment of the deep sea pipeline, the cabin body is subjected to watertight pressurization according to the water depth to be tested before the experiment. The interior of the cabin body 1-9 is pressurized by auxiliary equipment such as a pressure pump from the pressure valve 1-12, and the pressurization can be stopped when the pressure reaches the set pressure value. The full-scale test tubes 1-8 can then be subjected to static and dynamic tests under different combined loads.
4) High-temperature and high-pressure internal flow-external high water pressure-complex load combined loading test method
According to the purpose of the test, five different loads can be applied independently, such as water pressure, axial force, bending moment, vibration and torsional load, and can also be applied jointly. The time and the size of the applied load can be freely controlled, and the flexibility and the convenience of the load application are increased.
The approximate simulation test method for the deep-sea buried pipeline under the earthquake load is provided for truly reducing the operating environment of the deep-sea pipeline during installation and service, simulating various possible working conditions, introducing high-temperature and high-pressure internal flow, external high water pressure and complex load, realizing combined loading of the high-temperature and high-pressure internal flow, the external high water pressure and the complex load. By utilizing external high-temperature high-pressure water pump equipment (mainly comprising heaters 1-21, water tanks 1-22 and water pumps 1-23), high-temperature high-pressure water 5-6 is injected into the test pipe fittings 1-8 through the high-temperature high-pressure water inlet holes 1-29 and is output to the high-temperature high-pressure water pump equipment again through the high-temperature high-pressure output holes 1-16 to complete circulation, the actual operation state of a pipeline is simulated, and the temperature and humidity sensors 1-14 are used for monitoring the temperature and humidity of the high-temperature high-pressure water during output and ensuring the normal work of the test equipment. The hydraulic system is used for providing external pressure, the hydraulic loading pump station is matched to control the axial force-torsion-static bending moment-lateral vibration loading device to provide different complex loads, static and dynamic performance tests on the test piece are completed, the deep sea pressure chamber test operation flow is simplified, the operation is simple, the fault-tolerant rate is high, and no additional equipment is required to be added.
Claims (4)
1. A combined loading test system for complex loads of deep sea pipelines is used for loading test pipes, the front ends of the test pipes are fixedly connected with a front end sealing flange, the rear ends of the test pipes are fixedly connected with a tail end sealing flange, the test system comprises a cabin body main body, a cabin body supporting saddle, a test connecting shaft, a test pipe fixing device and a lateral vibration loading device, and is characterized in that,
connecting the front end sealing flange and the tail end sealing flange with the test connecting shaft by using nuts respectively;
the lateral vibration loading device comprises a vibration hoop or a vibration contact, a vibration servo hydraulic oil cylinder, a vibration loading connecting rod and a vibration loading connecting shaft, wherein the vibration loading connecting rod is fixedly connected with the vibration hoop or the vibration contact in a detachable mode, the force of the vibration servo hydraulic oil cylinder is applied to the vibration loading connecting rod through the vibration loading connecting shaft and then transmitted to the vibration hoop or the vibration contact, and the vibration hoop is used for connecting the vibration loading connecting rod with the test connecting shaft.
2. The testing system of claim 1, wherein said lateral vibration loading means further comprises another, second set of vibration loading means: this set of vibration loading device includes spherical spread groove, vibration loading connecting rod, vibration application of force pole and vibration loading ring, and experimental pipe fitting is fixed inside the pipe soil actuator cylinder during the use, and the vibration loading ring is used for tightly locking pipe soil actuator cylinder, spherical spread groove one end and vibration loading ring fixed connection, and vibration loading connecting rod, vibration application of force pole and vibration loading connecting rod detachably fixed connection are connected to the other end.
3. The testing system of claim 1, further comprising other load loading means: the device comprises a torsion loading device, an axial tension and compression loading device, a front-end static pressure bending moment loading device and a tail-end static pressure bending moment loading device.
4. The testing system of claim 1, wherein the main body of the capsule body is provided with a data acquisition hole, an exhaust valve, a water injection valve, a pressurization valve and a drain valve.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018047A (en) * | 2019-03-12 | 2019-07-16 | 天津大学 | A kind of deep-sea pipeline Complicated Loads combination loading pilot system |
| CN114636523A (en) * | 2022-05-17 | 2022-06-17 | 浙江大学 | Carrier gas bin testing device for hydrogen conveying pipeline |
| CN116818396A (en) * | 2023-08-31 | 2023-09-29 | 四川职业技术学院 | Control system and method for measuring influence of ratchet effect on anchoring point of submarine oil delivery pipe |
-
2019
- 2019-03-12 CN CN201920305551.7U patent/CN210347310U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018047A (en) * | 2019-03-12 | 2019-07-16 | 天津大学 | A kind of deep-sea pipeline Complicated Loads combination loading pilot system |
| CN114636523A (en) * | 2022-05-17 | 2022-06-17 | 浙江大学 | Carrier gas bin testing device for hydrogen conveying pipeline |
| CN116818396A (en) * | 2023-08-31 | 2023-09-29 | 四川职业技术学院 | Control system and method for measuring influence of ratchet effect on anchoring point of submarine oil delivery pipe |
| CN116818396B (en) * | 2023-08-31 | 2023-11-17 | 四川职业技术学院 | Control system and method for measuring influence of ratchet effect on anchoring point of submarine oil delivery pipe |
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