CN108507890B - Pressure vessel and pipeline corrosion fatigue test method - Google Patents
Pressure vessel and pipeline corrosion fatigue test method Download PDFInfo
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- CN108507890B CN108507890B CN201810234170.4A CN201810234170A CN108507890B CN 108507890 B CN108507890 B CN 108507890B CN 201810234170 A CN201810234170 A CN 201810234170A CN 108507890 B CN108507890 B CN 108507890B
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
- G01N2203/0242—With circulation of a fluid
Abstract
A corrosion fatigue test method for a pressure vessel and a pipeline comprises the following steps: s1, calculating the volume deformation value V of the container or the pipeline to be tested after the corrosion fatigue test according to the structure of the container or the pipeline to be tested, the fatigue test pressure and the parameters of the corrosive liquid medium; s2, determining the volume V' of the accumulator; s3, connecting the whole system, injecting corrosive liquid into the corrosive liquid pipeline until the driven cavity is filled with the corrosive liquid, and then sealing the driven cavity; s4, setting pressure, frequency and cycle number of fatigue test, pressure cycle number of fatigue test and alarm temperature parameter on the control module; s5, the control module controls the pressure fatigue module, and the volume of the driven cavity is periodically changed according to the set parameters until the cycle number set by the control module is reached; and S6, opening the driven cavity and discharging the corrosive liquid in the driven cavity. The invention can use corrosive solution as test medium, and test the fatigue performance of the structural member of the pressure vessel or pipeline through the diaphragm, thereby filling the industry blank.
Description
Technical Field
The invention relates to the field of corrosion fatigue tests, in particular to a method for testing corrosion fatigue of a pressure vessel and a pipeline.
Background
With the development of industry, pressure-bearing equipment such as pressure vessels/pipelines and the like are more widely applied, the types of internal media are more various, and for some pressure vessels/pipelines with corrosive internal media and under the working condition of fatigue alternating load, once leakage or fracture occurs, serious consequences are caused, so the design, manufacture and use requirements of the pressure vessels/pipelines are more severe than those of common vessels. At present, the requirements for corrosion tests in domestic and foreign standards are based on corrosion tests of pressure vessels/pipelines, and the requirements for corrosion tests (especially corrosion fatigue tests) of structural members such as pressure vessels/pipelines are not existed yet, and the fatigue tests for the structural members related in some standards also definitely require that non-corrosive liquid is used as a pressure medium for testing. The material corrosion test cannot completely reflect the state of the pressure vessel/pipeline structural member under the working condition, and particularly under the working condition of bearing fatigue alternating load, the influence of two interaction factors of corrosion and fatigue on the structural member is difficult to obtain only through material test analysis. Therefore, it is necessary to design and develop a system and a method for testing corrosion fatigue of pressure vessels and pipelines to test the corrosion fatigue performance of the pressure vessels/pipelines under the interaction of the corrosion medium and the fatigue alternating load.
Disclosure of Invention
In order to overcome the prior art, the invention provides a corrosion fatigue test method for a pressure vessel and a pipeline.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a pressure vessel and pipeline corrosion fatigue test system, includes pressure fatigue module, pressure conduction module, control module, pressure conduction module includes the energy storage ware, the energy storage ware includes the slave chamber, slave chamber side is the diaphragm, the slave chamber passes through last pipeline and the container or the pipe connection that awaits measuring, the system still includes the corrosive liquids pipeline that the corrosive liquids advances out of slave chamber, thereby the pressure fatigue module makes the diaphragm warp through pressure and makes the corrosive liquids make round trip movement between slave chamber and the pressure vessel or the pipeline that awaits measuring, control module is connected with the controlled end of pressure fatigue module.
Preferably, the energy accumulator further comprises a driving cavity, the driving cavity and the driven cavity are isolated by the diaphragm, the driving cavity is connected with the pressure fatigue module through a lower pipeline, and the pressure fatigue module inputs and outputs flowing media into and from the driving cavity.
Preferably, the pressure fatigue module comprises a first branch for inputting the flowing medium into the active cavity and a second branch for outputting the flowing medium from the active cavity, one end of the first branch and one end of the second branch are connected with the lower pipeline through the electromagnetic valve, and the controlled end of the electromagnetic valve is connected with the control module.
Preferably, the pressure fatigue module is a hydraulic fatigue module, and the hydraulic fatigue module comprises a hydraulic oil tank, a hydraulic pump arranged on the first branch and a one-way valve arranged between the electromagnetic valve and the hydraulic pump; the other end of the second branch is arranged on a hydraulic oil tank, and a filter is further arranged on the first branch between the hydraulic oil tank and the hydraulic pump.
Optimally, a hydraulic pressure sensor connected with the control module is arranged on the lower pipeline; and a diaphragm type pressure sensor is arranged on the upper pipeline.
Preferably, the lower pipeline is further provided with a thermometer connected with the controller module, and the hydraulic oil tank is internally provided with a heat exchanger connected with the controller.
Optimized, the pressure conduction module includes stop valve, lower stop valve, the gaseous replacement pipeline in the replacement initiative intracavity, the diaphragm is rubber materials, the corrosive liquid pipeline sets up on the energy storage ware of slave unit department, go up the stop valve setting on corrosive liquid pipeline, the replacement pipeline is on the energy storage ware of initiative chamber department, the stop valve setting is on the replacement pipeline down.
Preferably, the pressure fatigue module comprises a push rod for pushing the diaphragm to deform and a motor, wherein the controlled end of the motor is connected with the control module and drives the push rod to move.
Preferably, the front end of the push rod is of a spherical structure.
A test method adopting the pressure vessel and pipeline corrosion fatigue test system comprises the following steps:
s1, calculating the volume deformation value V of the container or the pipeline to be tested after the corrosion fatigue test according to the structure of the container or the pipeline to be tested, the fatigue test pressure and the parameters of the corrosive liquid medium;
s2, determining the volume V' of the accumulator;
s3, connecting the whole system, injecting corrosive liquid into the corrosive liquid pipeline until the driven cavity is filled with the corrosive liquid, and then sealing the driven cavity;
s4, setting pressure, frequency and cycle number of fatigue test, pressure cycle number of fatigue test and alarm temperature parameter on the control module;
s5, the control module controls the pressure fatigue module, and the volume of the driven cavity is periodically changed according to the set parameters until the cycle number set by the control module is reached;
and S6, opening the driven cavity and discharging the corrosive liquid in the driven cavity.
The invention has the advantages that:
(1) the invention applies force to the diaphragm on the driven cavity to deform the diaphragm so as to enable the corrosive liquid to move back and forth between the driven cavity and the pressure container or pipeline to be tested, the corrosion test and the fatigue test are simultaneously carried out, and the test system adopts the closed cavity filled with the corrosive liquid among the driven cavity, the upper pipeline and the container or pipeline to be tested, so that the pressure fatigue module is not limited by corrosive medium factors, a large amount of cost can be saved, the corrosion damage caused by the direct contact of equipment and corrosive solution medium can be avoided during use, and the equipment loss is obviously reduced. The fatigue performance of the structural member of the pressure container or the pipeline can be tested by using the corrosive solution as a test medium and the diaphragm, thereby filling up the industrial blank.
(2) The diaphragm divides the energy accumulator into a driving cavity and a driven cavity which are independent relatively, and the pressure fatigue module enables the diaphragm to be stressed uniformly through pressure conduction of flowing media.
(3) The first branch for the incoming flow medium and the second branch for the outgoing flow medium are arranged separately, so that the entry and exit are not disturbed.
(4) The hydraulic fatigue module realizes circulation, prevents that the pollutant from entering into the hydraulic tank, and the setting of filter can improve the purity of the hydraulic oil that enters into hydraulic pump and initiative intracavity for the pressure that detects in the initiative intracavity is also more stable.
(5) The pressure sensor used on the lower pipeline can measure the pressure in the active cavity, and the diaphragm type pressure sensor can prolong the service life of the pressure sensor due to the fact that corrosive solution is in the upper pipeline.
(6) According to the invention, the thermometer is arranged on the lower pipeline, and the heat exchanger is arranged in the hydraulic oil tank, so that the influence of heat generated by hydraulic oil in a hydraulic process on a test can be prevented.
(7) The setting of going up the stop valve guarantees that from the die cavity, go up the pipeline, pressure vessel or the pipeline that is surveyed is inclosed cavity in the test process, and the setting of lower stop valve and replacement pipeline can be directly once only replaced into hydraulic oil with the air in the initiative intracavity, so the debugging time before the reducible test improves the stability of fatigue test process.
(8) The diaphragm is deformed in a manner using a push rod, which is simple and the motor is easily controlled.
(9) The front end of the push rod is spherical, so that the push rod can flexibly contact with the diaphragm to protect the diaphragm.
(10) The method of the invention utilizes the control module to set the cycle number to carry out the fatigue test, and injects the corrosive liquid into the container or the pipeline to be tested in the driven cavity to carry out the corrosion test, and the method is simple and practical.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment 1 of a system for testing corrosion fatigue of a pressure vessel and a pipeline according to the present invention.
Fig. 2 is a schematic structural view of a pressure conduction module in embodiment 1.
Fig. 3 is a schematic structural diagram of an embodiment 5 of a system for testing corrosion fatigue of a pressure vessel and a pipeline according to the present invention.
The notations in the figures have the following meanings:
1-hydraulic oil tank 2-filter 3-hydraulic pump 4-one-way valve
5-three-position four-way solenoid valve 61-first branch 62-second branch
7-control line 8-thermometer
9-hydraulic pressure sensor 10-controller 11-diaphragm type pressure sensor
12-container or pipe to be tested 13-accumulator
14-corrosive liquid pipeline 15-replacement pipeline 16-upper pipeline 17-lower pipeline
18-upper stop valve 19-lower stop valve 20-motor 21-push rod
131-lower tubing interface 132-active cavity 133-diaphragm
134-driven cavity 135-upper pipeline interface
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention.
Example 1
As shown in fig. 1-2, a system for testing corrosion fatigue of a pressure vessel and a pipeline comprises a pressure fatigue module, a pressure conduction module and a control module. As shown in fig. 2, the pressure conduction module includes an accumulator 13, an upper stop valve 18, a lower stop valve 19, a replacement pipe 15 for replacing gas in the driving chamber 132, and a corrosive liquid pipe 14 for passing corrosive liquid into and out of the driven chamber 134. The accumulator 13 is a corrosion-resistant metal cavity, a diaphragm 133 is disposed in the middle of the cavity, and the diaphragm 133 divides the metal cavity into a driving chamber 132 and a driven chamber 134 with equal volumes. Wherein the diaphragm 133 is a rubber material that is resistant to corrosion and media corrosion. The driven cavity 134 is connected with a container or a pipeline to be tested through an upper pipeline 16, the driving cavity 132 is connected with a pressure fatigue module through a lower pipeline 17, and the pressure fatigue module inputs and outputs flowing media into and out of the driving cavity 132. The corrosive liquid line 14 is arranged on the energy accumulator 13 at the output chamber 134. An upper shut-off valve 18 is arranged on the etching liquid line 14, a displacement line 15 on the energy accumulator 13 at the drive chamber 132, and a lower shut-off valve 19 on the displacement line 15.
The pressure fatigue module comprises a first branch 61 for inputting flowing medium into the active cavity 132 and a second branch 62 for outputting the flowing medium from the active cavity 132, one end of the first branch 61 and one end of the second branch 62 are connected with the lower pipeline 17 through a solenoid valve, and the controlled end of the solenoid valve is connected with the control module. Wherein the electromagnetic valve is an electromagnetic valve with a reversing adjusting function. In this embodiment a three-position four-way solenoid valve 5 with a reversing function.
In detail, as shown in fig. 1, the pressure fatigue module is a hydraulic fatigue module, and the hydraulic fatigue module includes a hydraulic oil tank 1, a hydraulic pump 3 disposed on the first branch 61, and a check valve 4 disposed between the electromagnetic valve and the hydraulic pump 3; the other end of the second branch 62 is disposed on the hydraulic oil tank 1, and the filter 2 is disposed on the first branch 61 between the hydraulic oil tank 1 and the hydraulic pump 3. The lower pipeline 17 is provided with a hydraulic pressure sensor 9 and a thermometer 8 which are connected with the control module; the upper line 16 is provided with a diaphragm type pressure sensor 11, and the hydraulic oil tank 1 is provided with a heat exchanger (not shown) connected to the controller 10. The first branch 61, the second branch 62 and the upper pipeline 16 are all hydraulic pipelines. The flowing medium is common 68# air compressor oil.
Wherein the control module comprises a controller 10 and a control line 7, the hydraulic pump 3 being replaced by a set of hydraulic pumps 3.
The joint of the energy accumulator 13 and the lower pipeline 17 is provided with a lower pipeline interface 131, and the joint of the energy accumulator 13 and the upper pipeline 16 is provided with a pipeline interface, so that the pressure transmission module, the pressure fatigue module and a pressure container or a pipeline to be tested can be conveniently detached.
Example 2
A test method adopting the pressure vessel and pipeline corrosion fatigue test system in the embodiment 1 comprises the following steps:
s1, calculating the volume deformation value V of the container or pipeline 12 to be tested after the corrosion fatigue test according to the structure of the container or pipeline 12 to be tested, the fatigue test pressure and the parameters of the corrosive liquid medium;
s2, determining the volume V ' of the energy accumulator 13, wherein the volume V ' of the energy accumulator 13 is 4V-6V, the volume V ' of the energy accumulator 13 is 4V in the embodiment, and the energy accumulator 13 divides the inner space thereof into two cavities with equal size through a rubber diaphragm 133, namely a driving cavity 132 and a driven cavity 134;
and S3, connecting the pressure conduction module with the hydraulic fatigue module through the lower pipeline interface 131, connecting the container or pipeline 12 to be tested with the upper pipeline interface 135 through the upper pipeline 16, and respectively connecting the controller 10 in the control module with the hydraulic pump 3, the three-dimensional four-way electromagnetic valve, the thermometer 8, the hydraulic pressure sensor 9 and the diaphragm type pressure sensor 11 through the control circuit 7. And (3) opening the upper stop valve 18, injecting the corrosive liquid into the corrosive liquid pipeline 14 until the driven cavity 134 is filled with the corrosive liquid, closing the upper stop valve 18, opening the lower stop valve 19, and injecting the hydraulic oil into the displacement pipeline 15 until the driving cavity 132 is filled with the hydraulic oil, and closing the lower stop valve 19.
And S4, setting the pressure, frequency and cycle number of the fatigue test, the pressure cycle number of the fatigue test and the alarm temperature parameter on the controller 10.
S5, the control module controls the pressure fatigue module, the volume of the driven cavity 134 is changed periodically according to set parameters until the cycle number set by the control module is reached, in detail, 3 groups of hydraulic pumps are started, a hydraulic fatigue test is carried out on the driving cavity 132 of the energy accumulator 13, the driving cavity 132 takes hydraulic oil as a test medium to undergo the fatigue test, the pressure of the driving cavity 132 is transmitted to the driven cavity 134 through the diaphragm 133, and then is transmitted to a container/pipeline to be tested through the upper pipeline 16.
S6, after the test is finished, the upper stop valve 18 is opened, and the corrosive liquid in the driven cavity 134 is discharged completely.
If other corrosion solutions are needed to be used as media for fatigue test, the next test can be carried out just by replacing the pressure conduction module before the test, and meanwhile, the corrosion solution is injected into the driven cavity 134, and the corrosion fatigue test is carried out according to the steps of the method.
Example 3
The difference from embodiment 2 is that, in step S2, the volume V' of the accumulator 13 is 5V in this embodiment.
Example 4
The difference from embodiment 2 is that, in step S2, the volume V' of the accumulator 13 is 6V in this embodiment.
Example 5
As shown in fig. 3, a pressure vessel and pipeline corrosion fatigue test system, including pressure fatigue module, pressure conduction module, control module, pressure conduction module includes energy storage ware 13, energy storage ware 13 is driven chamber 134, driven chamber 134 one side is diaphragm 133, driven chamber 134 is connected with the container or the pipeline that awaits measuring through last pipeline 16, the system still includes corrosive liquid pipeline 14 of corrosive liquid business turn over driven chamber 134, the pressure fatigue module makes diaphragm 133 warp through pressure thereby makes corrosive liquid round trip movement between driven chamber 134 and the pressure vessel or the pipeline that is surveyed, control module is connected with the controlled end of pressure fatigue module.
The pressure fatigue module comprises a push rod 21 for pushing the diaphragm 133 to deform and a motor 20 which is connected with the control module at a controlled end and drives the push rod 21 to move. The front end of the push rod 21 is of a spherical structure. The diameter of the ball-like structure is smaller than the smallest inner diameter of the diaphragm 133 of the driven chamber 134, in this embodiment slightly smaller than the smallest inner diameter of the diaphragm 133, thus increasing the contact area of the pushrod 21 with the diaphragm 133. It is also possible to make the push rod 21 have a similar shape in cross section in the longitudinal direction to the diaphragm 133.
The diaphragm type pressure sensor 11 is provided on the upper line 16. The pressure conduction module comprises an upper stop valve 18, a lower stop valve 19 and a replacement pipeline 15 for replacing gas in the driving cavity 132, the diaphragm 133 is made of rubber materials, the corrosive liquid pipeline 14 is arranged on the energy accumulator 13 at the position of the driven cavity 134, the upper stop valve 18 is arranged on the corrosive liquid pipeline 14, the replacement pipeline 15 is arranged on the energy accumulator 13 at the position of the driving cavity 132, and the lower stop valve 19 is arranged on the replacement pipeline 15.
Example 6
A test method using the pressure vessel and pipeline corrosion fatigue test system of example 5, comprising the steps of:
s1, calculating the volume deformation value V of the container or pipeline 12 to be tested after the corrosion fatigue test according to the structure of the container or pipeline 12 to be tested, the fatigue test pressure and the parameters of the corrosive liquid medium;
s2, determining the volume V ' of the energy accumulator 13, wherein the volume V ' of the energy accumulator 13 is 2V-3V, and the volume V ' of the energy accumulator 13 is 3V in the embodiment;
and S3, installing a hydraulic fatigue module to enable the push rod 21 to move back and forth in a direction perpendicular to the diaphragm 133, connecting the container or the pipeline 12 to be tested with the upper pipeline interface 135 through the upper pipeline 16, and connecting the controller 10 in the control module with the motor 20 through the control circuit 7. The upper stop valve 18 is opened, the corrosive liquid is injected into the corrosive liquid pipeline 14 until the driven cavity 134 is filled with the corrosive liquid, and then the upper stop valve 18 is closed.
And S4, setting the pressure, frequency and cycle number of the fatigue test, the pressure cycle number of the fatigue test and the alarm temperature parameter on the controller 10.
S5, the control module controls the motor 20 to periodically change the volume of the driven cavity 134 according to the set parameters until the cycle number set by the control module is reached, and the pressure of the push rod 21 is transmitted to the driven cavity 134 through the diaphragm 133 and then transmitted to the container/pipeline to be tested through the upper pipeline 16.
S6, after the test is finished, the upper stop valve 18 is opened, and the corrosive liquid in the driven cavity 134 is discharged completely.
If other corrosion solutions are needed to be used as media for fatigue test, the next test can be carried out just by replacing the pressure conduction module before the test, and meanwhile, the corrosion solution is injected into the driven cavity 134, and the corrosion fatigue test is carried out according to the steps of the method.
Example 7
The difference from embodiment 6 is that, in step S2, the volume V' of the accumulator 13 is 2V in this embodiment.
Example 8
The difference from embodiment 6 is that, in step S2, the volume V' of the accumulator 13 is 2.5V in this embodiment.
The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A pressure vessel and pipeline corrosion fatigue test method uses a system comprising a pressure fatigue module, a pressure conduction module and a control module, wherein the pressure conduction module comprises an energy accumulator (13), the energy accumulator (13) comprises a driven cavity (134), a diaphragm (133) is arranged on one side of the driven cavity (134), the driven cavity (134) is connected with a vessel or pipeline to be tested through an upper pipeline (16), the system further comprises a corrosion liquid pipeline (14) for corrosion liquid to enter and exit from the driven cavity (134), the pressure fatigue module deforms the diaphragm (133) through pressure so that the corrosion liquid moves back and forth between the driven cavity (134) and the pressure vessel or pipeline to be tested, and the control module is connected with a controlled end of the pressure fatigue module, and is characterized by comprising the following steps:
s1, calculating the volume deformation value V of the container or pipeline (12) to be tested after the corrosion fatigue test according to the structure of the container or pipeline (12) to be tested, the fatigue test pressure and the parameters of the corrosive liquid medium;
s2, determining the volume V' of the accumulator (13);
s3, connecting the whole system, injecting corrosive liquid into the corrosive liquid pipeline (14) until the driven cavity (134) is filled with the corrosive liquid, and then sealing the driven cavity (134);
s4, setting pressure, frequency and cycle number of fatigue test, pressure cycle number of fatigue test and alarm temperature parameter on the control module;
s5, the control module controls the pressure fatigue module to periodically change the volume of the driven cavity (134) according to the set parameters until the cycle number set by the control module is reached;
s6, opening the driven cavity (134) and discharging the corrosive liquid in the driven cavity (134) completely.
2. The method for testing corrosion fatigue of the pressure vessel and the pipeline according to claim 1, wherein the accumulator (13) further comprises a driving cavity (132), the driving cavity (132) and a driven cavity (134) are isolated by the diaphragm (133), the driving cavity (132) is connected with a pressure fatigue module through a lower pipeline (17), and the pressure fatigue module inputs and outputs flowing media into the driving cavity (132).
3. The method for testing the corrosion fatigue of the pressure vessel and the pipeline as recited in claim 2, wherein the pressure fatigue module comprises a first branch (61) for inputting the flowing medium into the active cavity (132) and a second branch (62) for outputting the flowing medium from the active cavity (132), one end of the first branch (61) and one end of the second branch (62) are connected with the lower pipeline (17) through a solenoid valve, and the controlled end of the solenoid valve is connected with the control module.
4. A pressure vessel and pipeline corrosion fatigue test method according to claim 3, wherein the pressure fatigue module is a hydraulic fatigue module, and the hydraulic fatigue module comprises a hydraulic oil tank (1), a hydraulic pump (3) arranged on the first branch (61), and a check valve (4) arranged between the electromagnetic valve and the hydraulic pump (3); the other end of the second branch (62) is arranged on the hydraulic oil tank (1), and a filter (2) is further arranged on the first branch (61) between the hydraulic oil tank (1) and the hydraulic pump (3).
5. The method for testing the corrosion fatigue of the pressure vessel and the pipeline according to claim 2, wherein a hydraulic pressure sensor (9) connected with a control module is arranged on the lower pipeline (17); the upper pipeline (16) is provided with a diaphragm type pressure sensor (11).
6. The method for testing the corrosion fatigue of the pressure vessel and the pipeline according to claim 4, wherein the lower pipeline (17) is further provided with a thermometer (8) connected with a control module, and the hydraulic oil tank (1) is internally provided with a heat exchanger connected with a controller (10).
7. The pressure vessel and pipeline corrosion fatigue test method of claim 2, wherein the pressure conduction module comprises an upper stop valve (18), a lower stop valve (19), and a displacement pipeline (15) for displacing gas in the driving cavity (132), the diaphragm (133) is made of rubber material, the corrosive liquid pipeline (14) is arranged on the accumulator (13) at the driven cavity (134), the upper stop valve (18) is arranged on the corrosive liquid pipeline (14), the displacement pipeline (15) is arranged on the accumulator (13) at the driving cavity (132), and the lower stop valve (19) is arranged on the displacement pipeline (15).
8. The pressure vessel and pipeline corrosion fatigue test method of claim 1, wherein the pressure fatigue module comprises a push rod (21) for pushing the diaphragm (133) to deform and a motor (20) with a controlled end connected with the control module for driving the push rod (21) to move.
9. The method for testing corrosion fatigue of pressure vessel and pipeline according to claim 8, wherein the front end of the push rod (21) is a spherical structure.
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| CN110411843B (en) * | 2019-08-02 | 2022-07-15 | 合肥通用机械研究院有限公司 | Pressure container or pipeline air pressure test system and test method |
| CN111425659B (en) * | 2020-03-25 | 2021-11-23 | 艾迪机器(杭州)有限公司 | All-through vacuum interface diaphragm valve fatigue test system |
| CN111881546B (en) * | 2020-06-12 | 2023-11-10 | 合肥通用机械研究院有限公司 | Pressure-bearing equipment test pressure calculation method based on differential pressure type fatigue test system |
| CN112403104A (en) * | 2020-11-25 | 2021-02-26 | 宁波市特种设备检验研究院 | Return oil filtering system for energy accumulator pulse fatigue testing equipment |
| CN112556925B (en) * | 2020-12-03 | 2022-06-10 | 西安近代化学研究所 | Performance testing device and method for pressure sensor for gunpowder vacuum stability test |
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| CN201561902U (en) * | 2009-10-15 | 2010-08-25 | 徐州天地重型机械制造有限公司 | Hydraulic hose performance test experiment table |
| CN201852773U (en) * | 2010-07-30 | 2011-06-01 | 中国科学院金属研究所 | Corrosion fatigue tester with high-temperature and high-pressure circulating water |
| CN102192859A (en) * | 2011-04-02 | 2011-09-21 | 常州大学 | Pressure container corrosion fatigue testing device with closed-loop control |
| CN104897351A (en) * | 2015-05-22 | 2015-09-09 | 合肥通用机械研究院 | Method and system for testing air tightness of welding diaphragm type energy storage pressure container |
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