CN114414382B - System and method for simulating deep sea withstand voltage test - Google Patents
System and method for simulating deep sea withstand voltage test Download PDFInfo
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- CN114414382B CN114414382B CN202111522712.6A CN202111522712A CN114414382B CN 114414382 B CN114414382 B CN 114414382B CN 202111522712 A CN202111522712 A CN 202111522712A CN 114414382 B CN114414382 B CN 114414382B
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- 238000012360 testing method Methods 0.000 title claims abstract description 151
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- 238000004088 simulation Methods 0.000 abstract description 5
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- 239000013535 sea water Substances 0.000 description 19
- 239000003921 oil Substances 0.000 description 18
- 230000008569 process Effects 0.000 description 10
- 239000010720 hydraulic oil Substances 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The application relates to the technical field of deep sea, in particular to a system and a method for simulating deep sea pressure resistance; the simulation deep sea withstand voltage test system specifically comprises: the pressure tank is internally filled with test water, and is electrically connected with a pressure loading unit outside, and is used for providing pressure of simulated deep water for the pressure tank; the pressure test device is arranged in the pressure tank, and a pressure test unit is arranged in the pressure test device; the hydraulic power unit is arranged in the pressure tank and is electrically connected with the pressure test unit; in conclusion, the application can simulate the deep sea environment of about 2000m through the cooperation of the structure, so that the simulation pressure-resistant test can be carried out on the oil and gas pipeline pressure test equipment on land, thereby effectively avoiding a plurality of adverse factors of the marine test and improving the test safety and the test accuracy.
Description
Technical Field
The application relates to the technical field of deep sea, in particular to a system and a method for simulating deep sea pressure resistance.
Background
Deep sea is the "main battlefield" for future offshore oil development; with the great development of oil and gas field resources in deep sea areas at home and abroad, the pressure test workload of submarine pipelines and submarine underwater devices is increased year by year, and the pressure test of the pipelines related to the pressure test workload is more and more difficult; for the pressure test operation of the deepwater pipeline, equipment suitable for the pressure test operation of the deepwater oil-gas pipeline is needed, and the pressure test operation efficiency of the deepwater pipeline is improved; the pressure test equipment for the deep-sea oil and gas pipeline needs to be capable of meeting the pressure test work of the deep-sea pipeline with shallow water depth of 2000 m.
In order to ensure the safety and reliability of the oil and gas pipeline pressure test equipment in deep sea operation, the water tightness, the pressure bearing strength and the like of the equipment in a deep sea high-pressure environment need to be fully tested; at present, the test method for the deep sea operation part mostly adopts the method that pressure test equipment is sent to preset ocean depth for test; however, due to a plurality of uncertain factors on the sea bottom, the safety of the test is reduced, and the accuracy of the actual performance evaluation of the deep sea equipment is affected.
Disclosure of Invention
The application aims to provide a system and a method for simulating deep sea pressure resistance test, which are used for simulating the deep sea pressure resistance test of oil and gas pipeline pressure test equipment and improving test safety and test accuracy.
Technical scheme (one)
To achieve the above object, a first aspect of the present application provides a simulated deep sea withstand voltage test system, comprising:
the pressure tank is internally filled with test water, and is electrically connected with a pressure loading unit outside, and is used for providing pressure of simulated deep water for the pressure tank;
the pressure test device is arranged in the pressure tank, and a pressure test unit is arranged in the pressure test device;
and the hydraulic power unit is arranged in the pressure tank and is electrically connected with the pressure test unit.
As one of the alternatives of the present technical solution, the pressure tank is electrically connected with a plurality of detection units, which are used for detecting the internal state of the pressure tank.
As one of the alternatives of the present technical solution, the pressure test unit includes:
a high pressure plunger pump;
the hydraulic motor is in transmission connection with the high-pressure plunger pump;
the inlet end of the inlet control valve is connected with the filtering component, and the outlet end of the inlet control valve is communicated with the inlet end of the high-pressure plunger pump through the flow detection component;
and a discharge control valve having an inlet end in communication with a discharge end of the high pressure plunger pump, the discharge end in communication with the pressure sensing assembly.
As one of the alternatives of the present technical solution, the pressure test unit further includes: and the first pressure compensation component is in sealing connection with the hydraulic motor and is used for performing pressure compensation on the hydraulic motor.
As one of the alternatives of the present technical solution, the hydraulic power unit includes: the hydraulic pump is characterized by comprising a hydraulic pump, a driving motor and a hydraulic oil tank, wherein the output end of the hydraulic pump is in transmission connection with the hydraulic motor, the input end of the hydraulic pump is in transmission connection with the driving motor, and the oil inlet of the hydraulic pump is in sealing connection with the oil outlet of the hydraulic oil tank.
As one of the alternatives of the present technical solution, the hydraulic power unit further includes: and the second pressure compensation component is in sealing connection with the driving motor and is used for performing pressure compensation on the driving motor.
In order to achieve the above object, a second aspect of the present application provides a method for simulating deep sea withstand voltage test of a pressure test apparatus, using the test system as set forth in any one of the preceding claims, the method comprising:
slowly pouring test water into the pressure tank according to the test instruction;
stopping the filling operation when the current liquid level height value of the pressure tank reaches a preset liquid level threshold value, and pressurizing the inside of the pressure tank through a pressure loading unit according to a preset pressurizing strategy;
when the current pressure value in the pressure tank reaches a preset pressure threshold value, closing the pressure loading unit, and driving the pressure testing unit to execute pressure testing operation through the hydraulic power unit;
if the current flow value of the pressure test equipment is detected to reach a preset flow threshold value and the current exclusion pressure value is detected to reach a preset exclusion pressure threshold value, closing the hydraulic power unit, and reducing the pressure tank according to a preset reducing speed until the current pressure value in the pressure tank is detected to be zero.
As one of the alternatives of the present technical solution, the pressurization strategy is a staged pressurization strategy, specifically:
performing boosting operation on the pressure tank according to a preset boosting rate;
if the current pressure value in the pressure tank is detected to reach a first preset pressure value, stopping the pressurizing operation, and performing pressure stabilizing operation on the pressure tank according to preset time length;
if the current pressure value in the pressure tank is detected to be in the first preset pressure range, continuing to perform the boosting operation according to the preset boosting rate;
if the current pressure value in the pressure tank is detected to reach a second preset pressure value, stopping the pressurizing operation, and performing pressure stabilizing operation on the pressure tank according to the preset time length;
and if the current pressure value in the pressure tank is detected to be in the second preset pressure range, continuing to perform the boosting operation according to the preset boosting rate until the current pressure value in the pressure tank is increased to the preset pressure threshold value.
As one of the alternatives of the present technical solution, the specific steps of the pressure test operation performed by the pressure test unit driven by the hydraulic power unit are as follows:
detecting the current inflow value of the inflow control valve, and transmitting the detected flow information to a remote control center;
the opening of the inlet control valve is adjusted according to the received adjustment strategy sent by the remote control center, so that the current inlet flow value of the inlet control valve is adjusted to a preset flow threshold value;
detecting the current discharge pressure value of the discharge control valve, and transmitting the detected discharge pressure information to a remote control center;
and adjusting the opening of the discharge control valve according to the adjustment strategy sent by the remote control center so as to adjust the current discharge pressure value of the high-pressure plunger pump to a preset pressure threshold value.
As one of the alternatives of the present technical solution, the step-down rate is equal to the step-up rate.
(II) advantageous effects
Compared with the prior art, the application has the following beneficial effects:
the application provides a system and a method for simulating deep sea withstand voltage test, comprising the following steps: the pressure tank is internally filled with test water, and is electrically connected with a pressure loading unit outside, and is used for providing pressure of simulated deep water for the pressure tank; the pressure test device is arranged in the pressure tank, and a pressure test unit is arranged in the pressure test device; the hydraulic power unit is arranged in the pressure tank and is electrically connected with the pressure test unit; in conclusion, the application can simulate the deep sea environment of about 2000m through the cooperation of the structure, so that the simulation pressure-resistant test can be carried out on the oil and gas pipeline pressure test equipment on land, thereby effectively avoiding a plurality of adverse factors of the marine test and improving the test safety and the test accuracy.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
For a clearer description of an embodiment of the application or of the solutions of the prior art, the drawings that are necessary for the description of the embodiment or of the prior art are briefly described below, from which, without inventive faculty, other drawings can be obtained, as will be apparent to a person skilled in the art, in which:
FIG. 1 is a schematic diagram of a simulated deep sea withstand voltage test system according to the present application;
FIG. 2 is a schematic diagram of a pressure test device in accordance with the present application;
FIG. 3 is a schematic diagram of the hydraulic power unit of the present application;
FIG. 4 is a flow chart of a method for simulating a deep sea withstand voltage test according to the present application.
In the figure: 1. a pressure tank; 2. a pressure loading unit; 3. pressure test equipment; 4. a hydraulic power unit; 5. a high pressure plunger pump; 6. a hydraulic motor; 7. entering a control valve; 8. a filter assembly; 9. a flow detection assembly; 10. a discharge control valve; 11. a pressure detection assembly; 12. a first pressure compensating assembly; 13. a hydraulic pump; 14. a driving motor; 15. a hydraulic oil tank; 16. a second pressure compensation assembly; 17. an image pickup unit; 18. a temperature and pressure detection unit; 19. a high pressure discharge port; 20. a safety valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application is described in further detail below with reference to the attached drawings and detailed description:
as shown in fig. 1, 2 and 3, in order to implement a simulated deep sea pressure test on an oil and gas pipeline pressure test device 3, and improve test safety and test accuracy, a first aspect of the present application provides a simulated deep sea pressure test system of the pressure test device 3, including:
the pressure tank 1 is internally filled with test water, and because the operating environment of the oil and gas pipeline is usually seawater, the test water is preferably seawater; the external electric connection has pressure loading unit 2, is used for providing the pressure of the simulated deep water for pressure tank 1, the concrete one, pressure loading unit 2 provides you to be connected with pressure tank 1 too high the pressure pipeline, and, preferably, add the manometer on the output pipeline of the pressure loading unit 2, in order to carry on the real-time detection to the output pressure of the pressure loading unit 2; in a specific embodiment, in order to simulate the function and performance of the oil and gas pipeline pressure test equipment 3 in the deep sea 2000m sea water environment, the pressure loading unit 2 provides the pressure value in the pressure tank 1 to be the same as the pressure of the deep sea 2000m sea water environment; of course, the embodiment is not limited to simulating a seawater environment of 2000m in deep sea, and can be designed in advance according to the requirement, so that the simulation range is enlarged, and the application range is enlarged.
The pressure test equipment 3 is specifically an oil gas pipeline pressure test equipment 3, and is specifically arranged in the pressure tank 1, and a pressure test unit is arranged in the pressure test equipment 3;
in a specific embodiment, the pressure test device 3 is open, that is, the pressure test unit in the pressure test device 3 is always located in the sea water, so that the sea water is not required to be introduced into the pressure test unit through a pipeline, and then the high-pressure sea water generated by the pressure test unit can be directly discharged into the sea water.
And a hydraulic power unit 4 installed in the pressure tank 1 and electrically connected with the pressure test unit, for providing a power source for the pressure test unit, and the hydraulic power unit 4 may be electrically connected with the pressure test unit through a hydraulic line, for example; preferably, the hydraulic power unit 4 and the pressure test unit are designed according to the water depth application of not more than 2000m and meet the requirements of underwater anti-corrosion materials.
In addition, the test system also comprises a control center arranged on the ship, the whole set of test system can collect data such as flow, pressure, depth and the like in the operation process in real time and transmit the data to the control center in a connecting cable or wireless mode, and the control center adjusts the pressure test unit in real time according to the fed-back data so as to meet test requirements; in conclusion, the application can simulate the deep sea environment of about 2000m through the cooperation of the structure, so that the simulation pressure-resistant test can be carried out on the oil and gas pipeline pressure test equipment 3 on land, thereby effectively avoiding a plurality of adverse factors of the marine test and improving the test safety and the test accuracy.
In a preferred embodiment, the pressure tank 1 is of a detachable design so as to facilitate maintenance or cleaning of the pressure test device 3 and the hydraulic power unit 4 disposed therein, and specifically, the pressure tank 1 includes: the cover body and the body are detachably connected, the top end of the body is provided with an opening, and the cover body is hermetically arranged at the opening; the cover body is provided with a sealing ring, and when the cover body is spirally arranged at the opening, the sealing ring seals a gap between the cover body and the opening; before the test, the inside clean up of overhead tank 1 hangs into parts such as oil gas pipeline pressure test equipment 3 and hydraulic power unit 4 in proper order via the opening to be connected with pressure test equipment 3 with hydraulic power unit 4 through the hydraulic pressure pipeline, later connect power cable and communication cable, after the sealed lock of lid in the opening part of overhead tank 1 at last, can begin to carry out the pressure test operation.
According to an embodiment of the present application, as shown in fig. 1, in order to facilitate real-time understanding of the state in the pressure tank 1, a plurality of detection units are electrically connected to the inside of the pressure tank 1, for detecting the internal state of the pressure tank 1; preferably, the plurality of detection units at least comprise a camera unit 17 and a temperature and pressure detection unit 18, specifically, as shown in fig. 1, the camera unit 17 adopts 360-degree rotation cameras, the preferred number is three, the three cameras are arranged at different positions in the pressure tank 1, so that the shooting ranges of the three cameras cover all internal areas of the pressure tank 1, the internal state of the pressure tank 1 is shot in real time through the cameras, and the shot images are transmitted to a control center, so that a tester can intuitively know the state in the pressure tank 1; in addition, in the present embodiment, the temperature and pressure detecting unit 18 is configured as a temperature and pressure sensor, and is configured to detect the pressure and the temperature output by the pressure testing device 3 in real time, and transmit the detected data to the control center, so that the tester can know the test data in real time.
According to an embodiment of the present application, as shown in fig. 2, the pressure test unit includes:
a high-pressure plunger pump 5;
the hydraulic motor 6 is in transmission connection with the high-pressure plunger pump 5 and is used for driving the high-pressure plunger pump 5 to do reciprocating motion so as to pressurize the low-pressure seawater to the high-pressure seawater and provide the pressure required by the test for the pressure test equipment 3.
The inlet end is connected with the filter component 8, the outlet end is connected with the inlet end of the high-pressure plunger pump 5 through the flow detection component 9, specifically, the flow monitoring component is set as a flow sensor, which is wirelessly connected with the control center, the flow sensor is used for detecting the seawater flow entering the high-pressure plunger pump 5 and transmitting the detected data to the control center, the control center determines whether the current inlet flow is a required value according to a preset corresponding table of the inlet flow and the discharge pressure of the high-pressure plunger pump 5, if the current inlet flow does not reach the required value, that is, if the current inlet flow can not reach the required discharge pressure, the required opening of the current inlet control valve 7 is calculated according to a preset flow difference and a calculation formula of the opening of the inlet control valve 7, so that the opening of the inlet control valve 7 is adjusted according to the opening to increase the current discharge pressure value to the required discharge pressure value, the calculation process is not specifically described in the embodiment, and the control process of the current inlet flow exceeds the required discharge pressure is similar to the previous step; illustratively, the inlet control valve 7 is set as a water inlet stop valve, and filters the seawater to be introduced into the high-pressure plunger pump 5 through the filtering component 8 to remove impurities in the seawater, thereby ensuring the normal operation of the high-pressure plunger pump 5 and prolonging the service life of the high-pressure plunger pump 5; the maximum value of the entering flow of the test system is 37L/min, and specific parameter requirements can be set according to the requirement value of each operation.
And a discharge control valve 10, the inlet end of which communicates with the discharge end of the high-pressure plunger pump 5, the discharge end communicating with the pressure detection assembly 11; the discharge control valve 10 is exemplarily provided as a discharge shutoff valve; the pressure detecting component 11 is configured as a pressure sensor, and is configured to detect the discharge pressure of the high-pressure plunger pump 5, and transmit the detected data to the control center, where the control center calculates the current opening required by the discharge control valve 10 according to a preset calculation formula of the discharge pressure value and the opening of the discharge control valve 10, so as to adjust the opening of the discharge control valve 10 according to the opening, and in summary, the adaptive adjustment of the discharge control valve 10 can be implemented by adopting the above-mentioned matching manner, where the above-mentioned calculation process is in the prior art, so that detailed details are not described in this embodiment; for example, the maximum discharge pressure may be set to 75MPa, and specific parameter requirements may be set according to the required value for each operation.
According to an embodiment of the present application, the pressure test unit further includes: a first pressure compensation component 12, preferably, the first pressure compensation component 12 is configured as a pressure compensator; the first pressure compensation component 12 is in sealing connection with the hydraulic motor 6 and is used for performing pressure compensation on the hydraulic motor 6, so that the hydraulic motor 6 is compensated through the first pressure compensation component 12, seawater is prevented from invading the hydraulic motor 6 under the action of deep water pressure, and normal operation of the hydraulic motor 6 under the pressure of 2000m is guaranteed, wherein the first pressure compensation component 12 can be of an existing design, and the specific structure and the pressure compensation principle are all of the prior art, so that redundant description is not made here.
According to one embodiment of the present application, as shown in fig. 3, the hydraulic power unit 4 includes: the output end of the hydraulic pump 13 is in transmission connection with the hydraulic motor 6 through a quick connector to provide high-pressure hydraulic fluid for the pressure test equipment 3; the driving motor 14 is connected with the input end of the hydraulic pump 13 through a coupler in a transmission way, and specifically, the driving motor 14 drives the hydraulic pump 13 to rotate at a high speed, so that a power source is provided for the hydraulic motor 6; in addition, an oil inlet of the hydraulic pump 13 is connected with an oil outlet of the hydraulic oil tank in a sealing manner.
Further, in order to ensure that the driving motor 14 and the hydraulic oil tank 15 can resist the external force generated by the deep water pressure to the components under the water depth of 2000m and prevent the sea water from immersing into the components, the hydraulic power unit 4 preferably further comprises: the second pressure compensation component 16, preferably, the second pressure compensation component 16 adopts a pressure compensator; the second pressure compensation component 16 is in sealing connection with the driving motor 14 and is used for performing pressure compensation on the driving motor 14; also, the hydraulic tank 15 is provided as a hydraulic tank 15 having a pressure compensation function for pressure-compensating the hydraulic tank 15 so that the pressure in the hydraulic tank 15 is always kept in agreement with the external pressure.
In order to facilitate the connection of the pressure test device 3 with the external pipeline to provide pressure and flow to the external pipeline according to an embodiment of the present application, as shown in fig. 3, the pressure test unit further includes: the inlet end of the high-pressure discharge port 19 communicates with one of the discharge ends of the water discharge control valve, and the discharge end of the high-pressure discharge port 19 extends to the outside of the pressure test device 3.
According to an embodiment of the present application, in order to ensure that the pressure test device 3 outputs stable pressure and flow rate, the pressure test unit further includes: and a safety valve 20, wherein the safety valve 20 is connected with one output end of the plunger pump, when the discharge pressure and the flow rate exceed the maximum threshold value, the safety valve 20 is remotely controlled to be opened, so that the redundant high-pressure seawater is discharged, and the maximum flow rate is 37L/min and the maximum discharge pressure is 75MPa.
As shown in fig. 4, a second aspect of the present application provides a method for testing an analog deep sea withstand voltage of a pressure test apparatus 3, using a test system as set forth in any one of the preceding claims, the method comprising:
s101, slowly pouring test water into the pressure tank 1 according to a test instruction;
s102, stopping filling operation when the current liquid level height value of the pressure tank 1 is detected to reach a preset liquid level threshold value, and pressurizing the inside of the pressure tank 1 through a pressure loading unit 2 according to a preset pressurizing strategy;
because the pressure test has certain danger and destructiveness, the risk of directly measuring the maximum value is great, in order to reduce the risk, the embodiment adopts the staged pressurization strategy to make some abnormalities can discover and solve when the low pressure, and then can prevent the major accident from appearing when the high pressure test, specifically:
performing boosting operation on the pressure tank 1 according to a preset boosting rate;
stopping the pressurizing operation if the current pressure value in the pressure tank 1 is detected to reach a first preset pressure value, and performing the pressure stabilizing operation on the pressure tank 1 according to the preset time length;
if the current pressure value in the pressure tank 1 is detected to be in the preset pressure range, continuing to perform the boosting operation according to the preset boosting rate;
stopping the pressurizing operation if the current pressure value in the pressure tank 1 is detected to reach a second preset pressure value, and performing the pressure stabilizing operation on the pressure tank 1 according to the preset time length;
if the current pressure value in the pressure tank 1 is detected to be in the preset pressure range, continuing to perform the boosting operation according to the preset boosting rate until the current pressure value in the pressure tank 1 is raised to the preset pressure threshold.
The pressure increasing rate is 0.3MPa/min, the first preset pressure value is 5MPa, the preset pressure stabilizing time is 10min, the second preset pressure value is 10MPa, the preset pressure threshold is 20MPa, the preset pressure range is not more than +/-5% of the preset pressure threshold, when the first preset pressure value is 5MPa, the preset pressure range is 5.25MPa-4.75MPa, and the parameters are only used for conveniently understanding the whole control method, and specific parameters can be preset according to the working state.
S103, when the current pressure value in the pressure tank 1 is detected to reach a preset pressure threshold value, closing the pressure loading unit 2, and driving the pressure testing unit to execute pressure testing operation through the hydraulic power unit 4;
specifically, the specific steps of driving the pressure test unit to perform the pressure test operation through the hydraulic power unit 4 are as follows:
detecting the current inflow value of the inflow control valve 7, and transmitting the detected flow information to a remote control center;
the opening degree of the inlet control valve 7 is adjusted according to the adjustment strategy sent by the remote control center, so that the current inlet flow value of the inlet control valve 7 is adjusted to a preset flow threshold value;
detecting a current discharge pressure value of the discharge control valve 10 and transmitting the detected discharge pressure information to a remote control center;
and adjusting the opening of the discharge control valve 10 according to the adjustment strategy sent from the remote control center so as to adjust the current discharge pressure value of the high-pressure plunger pump 5 to a preset pressure threshold value.
S104, if the current flow value of the pressure test equipment 3 is detected to reach a preset flow threshold value and the current exclusion pressure value is detected to reach a preset exclusion pressure threshold value, closing the hydraulic power unit 4, and reducing the pressure tank 1 according to a preset pressure reduction rate until the current pressure value in the pressure tank 1 is detected to be zero; in the present embodiment, preferably, the step-down rate is equal to the step-up rate; illustratively, the depressurization rate is 0.3MPa/min; and detecting the current state inside the pressure tank 1 through a plurality of detection units, and if the current state is detected to be in a normal state range, continuing to perform the boosting operation according to the preset boosting rate.
Before the test, the inside clean up of overhead tank 1 hangs into parts such as oil gas pipeline pressure test equipment 3 and hydraulic power unit 4 in proper order via the opening to be connected with pressure test equipment 3 with hydraulic power unit 4 through the hydraulic pressure pipeline, later connect power cable and communication cable, after the sealed lock of lid in the opening part of overhead tank 1 at last, can begin to carry out the pressure test operation.
In the test, water is slowly filled into the pressure tank 1, the pressure loading unit 2 is started to boost the pressure of the pressure tank 1 (103) at the speed of 0.3MPa/min, the pressure is stabilized for 10 minutes after the internal pressure of the pressure tank 1 reaches 5MPa, whether the pressure tank 1 is abnormal or not is observed through the monitoring camera, the temperature pressure sensor and other detection units, and when the current pressure value in the pressure tank 1 is detected to be between 5.25MPa and 4.75MPa, the condition that the pressure tank 1 is abnormal at the moment is shown; then, the boosting operation is continuously carried out at the speed of 0.3MPa/min until the current pressure tank 1 is boosted to 10MPa, then the pressure is stabilized for 10 minutes, if no abnormality is observed in the current pressure tank 1, the boosting operation is continuously carried out at the speed of 0.3MPa/min until the current pressure tank 1 is boosted to 20MPa, if no abnormality is observed in the current pressure tank 1, the driving motor 14 is started to drive the hydraulic motor 6 to carry out high-speed movement through the hydraulic pump 13, so that the hydraulic motor 6 drives the high-pressure plunger pump 5 to carry out reciprocating movement, and the low-pressure seawater is pressurized to the high-pressure seawater, so that the pressure required by the test is provided for the pressure test equipment 3; in the process, the opening of the inlet control valve 7 is adjusted in real time according to the detected inlet flow, so that the current inlet flow value of the inlet control valve 7 is adjusted to a preset flow threshold value, and the preset flow threshold value is 37L/min in an exemplary manner; similarly, the opening of the discharge control valve 10 is adjusted in real time according to the detected discharge pressure, so as to adjust the current discharge pressure value of the discharge control valve 10 to a preset pressure threshold, and the preset flow threshold is 75MPa; in summary, according to the above adjustment, the inlet flow rate and the outlet pressure can be achieved correspondingly, and when the tested oil and gas pipeline is placed in the deep sea of 200m for working, the corresponding inlet flow rate can be adaptively matched according to the required outlet pressure, so that different outlet pressure requirements can be met; and after the pressure tank is stabilized, the operation is continued for 30 minutes, if the whole system is observed to be abnormal, the hydraulic power unit 4 is driven to stop completely, at the moment, the pressure tank 1 is subjected to pressure reduction operation at the speed of 0.3MPa/min until the pressure in the pressure tank 1 is reduced to zero, so that a pressure-proof test is completed, and then, a cover body is only required to be opened, and the components such as the pressure test equipment 3, the hydraulic power unit 4 and the like are sequentially lifted out, and whether the components are abnormal or not is observed.
In this specification, each embodiment is described in a progressive manner, and a plurality of embodiments are mainly described and are different from other embodiments, so that identical and similar parts between the embodiments are all mutually referred.
It should be noted that in the description and claims of the present application and in the above figures, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order of such entities or actions. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be capable of being practiced otherwise than as specifically illustrated and described.
Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Many modifications and variations to these embodiments will be apparent to those skilled in the art that the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The method for simulating the deep sea withstand voltage test is applied to a system for simulating the deep sea withstand voltage test, and is characterized in that the system comprises:
the pressure tank (1), the pressure tank (1) comprises a cover body and a body which are detachably connected, the top end of the body is provided with an opening, the cover body is installed at the opening in a sealing way, test water is poured into the pressure tank (1), and a pressure loading unit (2) is electrically connected to the outside and used for providing simulated deep water pressure for the pressure tank (1);
the pressure test device (3) is arranged in the pressure tank (1), a pressure test unit is arranged in the pressure test device (3), the pressure test unit comprises a high-pressure plunger pump (5), a hydraulic motor (6), an inlet control valve (7), an outlet control valve (10) and a first pressure compensation component (12), and the hydraulic motor (6) is in transmission connection with the high-pressure plunger pump (5); the inlet end of the inlet control valve (7) is connected with the filtering component (8), and the outlet end of the inlet control valve is communicated with the inlet end of the high-pressure plunger pump (5) through the flow detection component (9); an inlet end of the discharge control valve (10) is communicated with a discharge end of the high-pressure plunger pump (5), the discharge end is communicated with a pressure detection assembly (11), and the first pressure compensation assembly (12) is in sealing connection with the hydraulic motor (6) and is used for performing pressure compensation on the hydraulic motor (6);
the hydraulic power unit (4) is arranged in the pressure tank (1) and is electrically connected with the pressure test unit;
the test method comprises the following steps:
slowly pouring test water into the pressure tank (1) according to the test instruction;
when the current liquid level height value of the pressure tank (1) is detected to reach a preset liquid level threshold value, stopping the filling operation, and pressurizing the inside of the pressure tank (1) through a pressure loading unit (2) according to a preset pressurizing strategy;
when the current pressure value in the pressure tank (1) is detected to reach a preset pressure threshold value, the pressure loading unit (2) is closed, and the pressure testing unit is driven by the hydraulic power unit (4) to execute pressure testing operation;
the opening of the inlet control valve (7) is adjusted in real time according to the detected inlet flow, so that the current inlet flow value of the inlet control valve (7) is adjusted to a preset flow threshold value; the opening degree of the discharge control valve (10) is adjusted in real time according to the detected discharge pressure, so that the current discharge pressure value of the discharge control valve (10) is adjusted to a preset pressure threshold value;
when the current flow value of the pressure test equipment (3) is detected to reach a preset flow threshold value and the current exclusion pressure value is detected to reach a preset discharge pressure threshold value, the hydraulic power unit (4) is closed, and the pressure tank (1) is reduced according to a preset pressure reduction rate until the current pressure value in the pressure tank (1) is detected to be zero.
2. The method for testing the withstand voltage of the simulated deep sea according to claim 1, wherein a plurality of detection units are electrically connected to the inside of the pressure tank (1) for detecting the internal state of the pressure tank (1).
3. A simulated deep sea withstand voltage test method as claimed in claim 1, wherein said hydraulic power unit (4) comprises: the hydraulic pump (13), driving motor (14) and hydraulic tank (15) that cooperate, the output of hydraulic pump (13) with hydraulic motor (6) transmission is connected, the input of hydraulic pump (13) with driving motor (14) transmission is connected, the oil inlet of hydraulic pump (13) with the oil-out sealing connection of hydraulic tank (15).
4. A simulated deep sea pressure resistance test method as claimed in claim 3, wherein said hydraulic power unit (4) further comprises: and the second pressure compensation assembly (16) is in sealing connection with the driving motor (14) and is used for performing pressure compensation on the driving motor (14).
5. The simulated deep sea pressure resistance test method of claim 1, wherein the pressurization strategy is a staged pressurization strategy, specifically:
performing a boosting operation on the pressure tank (1) according to a preset boosting rate;
stopping the pressurizing operation when the current pressure value in the pressure tank (1) is detected to reach a first preset pressure value, and performing the pressure stabilizing operation on the pressure tank (1) according to the preset time length;
if the current pressure value in the pressure tank (1) is detected to be in a first preset pressure range, continuing to perform boosting operation according to the preset boosting rate;
stopping the pressurizing operation when the current pressure value in the pressure tank (1) is detected to reach a second preset pressure value, and performing the pressure stabilizing operation on the pressure tank (1) according to the preset time length;
if the current pressure value in the pressure tank (1) is detected to be in the second preset pressure range, continuing to perform the boosting operation according to the preset boosting rate until the current pressure value in the pressure tank (1) is raised to the preset pressure threshold value.
6. The method for simulating deep sea pressure resistance test according to claim 5, wherein the specific steps of driving the pressure test unit to perform the pressure test operation by the hydraulic power unit (4) are as follows:
detecting the current inflow value of the inflow control valve (7), and transmitting the detected flow information to a remote control center;
the opening degree of the inlet control valve (7) is adjusted according to the adjustment strategy sent by the remote control center, so that the current inlet flow value of the inlet control valve (7) is adjusted to a preset flow threshold value;
detecting a current discharge pressure value of the discharge control valve (10), and transmitting the detected discharge pressure information to a remote control center;
and adjusting the opening degree of the discharge control valve (10) according to the adjustment strategy sent from the remote control center so as to adjust the current discharge pressure value of the high-pressure plunger pump (5) to a preset pressure threshold value.
7. The method for testing the withstand voltage in the deep sea according to claim 5, wherein the depressurization rate is equal to the pressurization rate.
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| CN114812656B (en) * | 2022-06-28 | 2022-09-16 | 江苏晟尔检测仪器有限公司 | Pressure-resistant test device for detecting instrument in submarine pipeline |
| CN117309363B (en) * | 2023-11-30 | 2024-03-19 | 广东智能无人系统研究院(南沙) | Full sea depth hydraulic simulation test system and method based on water-based working medium |
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