CN112781860A - Gas-liquid two-phase simulation test device and method for valve internal leakage - Google Patents
Gas-liquid two-phase simulation test device and method for valve internal leakage Download PDFInfo
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- CN112781860A CN112781860A CN201911078516.7A CN201911078516A CN112781860A CN 112781860 A CN112781860 A CN 112781860A CN 201911078516 A CN201911078516 A CN 201911078516A CN 112781860 A CN112781860 A CN 112781860A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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Abstract
The invention discloses a gas-liquid two-phase simulation test device for valve internal leakage, which comprises: the storage tank group comprises a first storage tank and a second storage tank, the first storage tank is connected with the second storage tank through an adjusting valve, the second storage tank is provided with a liquid inlet, and an air compressor is connected with the first storage tank through an inflation valve; the test pipeline is sequentially connected with the flowmeter group, the valve group to be tested and the emptying pipe group in series, wherein in a liquid phase mode, the regulating valve is closed, the inflation valve is opened, the first storage tank is inflated to a first pressure value, the liquid inlet is opened, and the second storage tank stores water to a first liquid level; in the first gas phase mode, the regulating valve is closed, the inflation valve is opened, the inflation valve is closed after the first storage tank is inflated to the second pressure value, the regulating valve is opened, and the second storage tank is inflated to the third pressure value. The invention also discloses a gas-liquid two-phase simulation test method for the internal leakage of the valve. The invention can switch gas-liquid two-phase simulation tests, improve the utilization rate of the device and reduce the cost.
Description
Technical Field
The invention relates to the field of valve leakage detection in the petrochemical industry, in particular to a gas-liquid two-phase simulation test device and method for valve internal leakage.
Background
In process plants in the petrochemical industry, valves are an essential part. At present, with the continuous development of equipment manufacturing technology, valves used in petrochemical devices are generally improved in both volume and structural complexity and technical level. Along with the continuous diversification of production processes and material types, the operating conditions of the valve are increasingly complex and severe, the opening and closing operation of the valve is frequent, and the phenomena of running, overflowing, dripping and leaking of the valve of the petrochemical device are caused by factors such as improper use and maintenance. Once a valve of a petrochemical plant process pipeline is leaked, the safety of equipment is seriously threatened; meanwhile, the leakage of the valve can also generate energy loss, and the conveying efficiency of the process pipeline medium of the device is reduced. Statistical data show that about 22% of industrial valves have leakage problems, more than one hundred of fire explosion accidents occur in the petrochemical industry in the near 30 years, wherein the accidents caused by the leakage of the valves and the pipelines account for 35.1%; in petrochemical plants, the non-controlled release of organic compounds caused by valve leakage accounts for 60%. Therefore, in the petrochemical production process, the valve leakage can be timely, efficiently and accurately found, and the method has important significance.
Valve leakage can be generally classified into outer leakage and inner leakage. When the valve leaks, the valve is visual, and the valve can be checked by methods such as audible flow sound, leakage detection liquid leakage detection, combustible gas detector leakage detection and the like. However, when the valve leaks, the valve is not easy to be found, has strong concealment and is easy to cause potential safety hazard. The method can provide guidance for detecting the valve internal leakage in the actual production process by simulating the valve internal leakage of various types and specifications and carrying out acoustic emission test detection. At present, the conventional valve leakage test bed is single in simulation mode generally and is difficult to simulate various different working conditions of petrochemical production. In order to obtain a more comprehensive simulation result, a plurality of sets of valve leakage test beds are often needed to perform a simulation test, so that the research cost is increased, and the utilization rate of equipment is reduced. In addition, pressure fluctuations that occur during the test can influence the simulation results.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
One of the objectives of the present invention is to provide a simulation test apparatus and method for gas-liquid two-phase leakage in a valve, so as to reduce the cost of the test apparatus in the prior art and improve the utilization rate of the apparatus.
The invention also aims to provide a device and a method for simulating gas-liquid two-phase leakage in a valve, so as to solve the problem that a plurality of sets of test devices are needed to simulate different working conditions in the prior art.
To achieve one or more of the above objects, according to a first aspect of the present invention, there is provided a valve internal leakage gas-liquid two-phase simulation test apparatus, comprising: the storage tank group comprises a first storage tank and a second storage tank, the first storage tank is connected with the second storage tank through an adjusting valve, the second storage tank is provided with a liquid inlet, and an air compressor is connected with the first storage tank through an inflation valve; the test pipeline is connected to the downstream of the second storage tank and is sequentially connected with the flowmeter group, the valve group to be tested and the emptying pipe group in series, wherein in the liquid phase mode, the regulating valve is closed, the inflation valve is opened, the first storage tank is inflated to a first pressure value, the liquid inlet is opened, and the second storage tank stores water to a first liquid level; in the first gas phase mode, the regulating valve is closed, the inflation valve is opened, the inflation valve is closed after the first storage tank is inflated to the second pressure value, the regulating valve is opened, and the second storage tank is inflated to the third pressure value.
Further, among the above-mentioned technical scheme, leak in the valve gas-liquid two-phase analogue test device still includes: and the instrument air tank is connected with the air compressor and provides instrument air for the storage tank group.
Further, in the above technical solution, the flow meter group includes at least two gas flow meters with different measuring ranges and at least two liquid flow meters with different measuring ranges; the valve group to be tested comprises a plurality of valves to be tested.
Further, in the above technical solution, the evacuation pipe group includes an exhaust pipe and a drain pipe.
Further, among the above-mentioned technical scheme, the storage tank group is equipped with the relief valve.
Further, among the above-mentioned technical scheme, the second storage tank is equipped with level sensor.
Further, among the above-mentioned technical scheme, in the second gaseous phase mode, the governing valve is in normally open state, and the inflation valve is opened, and first storage tank and second storage tank are aerifyd to the fourth pressure value simultaneously.
According to a second aspect of the present invention, the present invention provides a simulation test method for gas-liquid two-phase leakage in a valve, the method employs the simulation test device for gas-liquid two-phase leakage in a valve according to any one of the above technical solutions, and the simulation test method for gas-liquid two-phase leakage in a valve at least includes the following steps: selecting a valve to be tested, a flowmeter and a mode; inflating the storage tank group; in the liquid phase mode, storing water in a second storage tank; and opening the test pipeline to detect the inner leakage.
Further, in the above technical scheme, before the step of inflating the tank group, the step of inflating the instrument wind tank is further included.
Further, in the above technical scheme, the method for the gas-liquid two-phase simulation test of the valve internal leakage further comprises the following steps: and after the test is finished, emptying the gas-liquid two-phase simulation test device leaked in the valve.
Further, in the above technical scheme, the internal leakage detection adopts acoustic emission detection.
Further, in the above technical scheme, the gas-liquid two-phase simulation test device for the leakage in the valve is controlled by a PLC controller.
Further, in the above technical scheme, the method for the gas-liquid two-phase simulation test of the valve internal leakage further comprises the following steps: in the liquid phase mode, an alarm signal is sent when the liquid level of the second tank is lower than the second liquid level.
Compared with the prior art, the invention has the following beneficial effects:
1. through switching the gas-liquid two-phase simulation test, the utilization rate of the device is improved, the cost is reduced, and a plurality of sets of simulation test devices are not required.
2. The valve can be selected according to test requirements, internal leakage of the valve under different working conditions can be simulated, and the test range is wider.
3. The first gas phase mode is adopted, so that tests with different pressure requirements can be met; the second gas phase mode is adopted, the test of keeping the same pressure for a long time can be met, the pressure is stable, frequent switching of the state of the regulating valve is avoided, and the service life is prolonged.
4. The invention can be automatically controlled by a PLC controller, and has simple and convenient operation and higher efficiency.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means implementable in accordance with the contents of the description, and to make the above and other objects, technical features, and advantages of the present invention more comprehensible, one or more preferred embodiments are described below in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of a gas-liquid two-phase simulation test device for gas leakage in a valve according to an embodiment of the invention.
Description of the main reference numerals:
10-an air compressor, 20-a storage tank group, 21-a first storage tank, 211-an inflation valve, 22-a second storage tank, 221-a regulating valve, 222-a liquid inlet, 30-an instrument air tank, 40-a flow meter group, 411-a first gas flow meter, 412-a second gas flow meter, 421-a first liquid flow meter, 422-a second liquid flow meter, 50-a valve group to be tested, 51-a valve to be tested, 52-a hose, 60-an evacuation pipe, 61-an exhaust pipe and 62-a liquid discharge pipe.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.
As shown in fig. 1, a two-phase simulation test device for gas-liquid leakage in a valve according to an embodiment of the present invention includes an air compressor 10 and a tank set 20. The storage tank group 20 comprises a first storage tank 21 and a second storage tank 22, the two storage tanks are connected through a regulating valve 221, the air compressor 10 is connected with the first storage tank 21 through an inflation valve 211, and the second storage tank 22 is provided with a liquid inlet. The storage tank group 20 is provided with a gas-liquid two-phase mode, so that a simulation test can be performed on gas or liquid leakage without two sets of simulation test devices. Illustratively, in the liquid phase mode, the regulating valve 221 is closed, the gas filling valve 211 is opened, the air compressor 10 fills the first storage tank 21 with gas to a first pressure value, and then the liquid inlet 222 is opened, and the second storage tank 22 stores water to a first liquid level. During the test, the regulating valve 221 is opened, the first storage tank 21 is pressurized to the second storage tank 22, and the liquid in the second storage tank 22 enters the test pipeline under the pressure. In the first gas phase mode, the regulating valve 221 is closed, the inflation valve 211 is opened, the air compressor 10 inflates the first storage tank 21 to the second pressure value, then the inflation valve 211 is closed, the regulating valve 221 is opened, the first storage tank 21 releases pressure to the second storage tank 22 and inflates the pressure to the third pressure value, the regulating valve 221 is automatically closed, and when the pressure value of the second storage tank 22 is lower than the third pressure value, the regulating valve 221 is automatically opened. The first gas phase mode can meet the pressure switching in different tests, the pressure is kept stable by opening and closing the regulating valve 221 in the tests, and the gas phase mode is suitable for gas phase simulation tests with small leakage amount.
Further, in one or more exemplary embodiments of the present invention, in order to meet the pressure stability requirements of different simulation tests, so that the simulation test results are more accurate, the gas phase simulation further includes a second gas phase mode for simultaneously filling the first storage tank 21 and the second storage tank 22. In the second gas phase mode, the regulating valve 221 is in a normally open state, the inflation valve 211 is opened, and the air compressor 10 inflates the first storage tank 21 and the second storage tank 22 to a fourth pressure value simultaneously. The first storage tank 21 and the second storage tank 22 are communicated and have the same pressure, and the second gas phase mode can meet the requirement of pressure stability in a pipeline for a long time, is suitable for a simulation test with a large leakage amount, and avoids the loss of the frequently-opened and-closed regulating valve 221 and pressure fluctuation caused by the loss.
Further, in one or more exemplary embodiments of the present invention, the gas-liquid two-phase simulation test device for gas leakage in a valve further includes an instrument air tank 30 connected to the air compressor 10, wherein the instrument air tank 30 supplies instrument air to the control valve in the device for supplying air to the storage tank set 20.
Further, in one or more exemplary embodiments of the present invention, a test line is connected downstream of the tank bank 20, and the test line is connected in series with the flow meter bank 40, the valve bank 50 to be tested, and the purge line bank 60 in this order. Illustratively, the flow meter set 40 includes a first gas flow meter 411 and a second gas flow meter 412, and a first liquid flow meter 421 and a second liquid flow meter 422. It should be understood that the present invention is not limited thereto, the number of flow meters in the flow meter group can be selected according to actual needs, and one skilled in the art can reserve a pipe in the flow meter group. In order to meet the requirement of accurate flow measurement of different magnitudes, the ranges of the gas flow meters are preferably different, for example, the range of the first gas flow meter 411 is 0 to 2,000SLM, and the range of the second gas flow meter 412 is 0 to 120,000 SLM. When the amount of leakage is great in the simulation, the gas flowmeter with the large measuring range is preferably selected, when the amount of leakage is small in the simulation, the gas flowmeter with the small measuring range is preferably selected, and the detection precision is improved on the premise of meeting the measuring range requirement. In order to meet the requirement of accurate flow measurement of different magnitudes, the ranges of the liquid flow meters are preferably different, for example, the range of the first liquid flow meter 421 is 0 to 100SLM, and the range of the second liquid flow meter 422 is 100 to 1,200 SLM. When the amount of leakage is great in the simulation, the liquid flowmeter with the large measuring range is preferably selected, when the amount of leakage is small in the simulation, the liquid flowmeter with the small measuring range is preferably selected, and the detection precision is improved on the premise of meeting the measuring range requirement. Illustratively, the valve set under test 50 includes a plurality of valves under test 51 of different kinds and/or different diameters. For example, the valve set 50 to be tested may include six valves 51 to be tested, the drift diameters of which are DN50, DN80, DN100, DN150, DN200, and DN250, and the valves to be tested may be gate valves, stop valves, ball valves, etc., which is not limited in the present invention. The two sides of the valve 51 to be tested are provided with blind plates, when a gas-liquid two-phase simulation test for leakage in the valve is carried out, the blind plates on the two sides of the valve to be tested are opened, and other blind plates are in a closed state. Preferably, but not by way of limitation, a flexible connection, such as hose 52, may be used at the blind to facilitate replacement of the valve under test and pipe modifications. The valve group 50 to be tested may also comprise a reserve pipe.
Further, in one or more exemplary embodiments of the present invention, the second tank 22 is provided with a liquid level sensor (not shown) having at least two thresholds, and when the stored water reaches the first liquid level, the liquid inlet 222 is automatically closed to stop the stored water; when the liquid level of the second storage tank 22 is lower than the second liquid level in the test process, an alarm signal is sent out, the alarm signal is turned off, the liquid inlet 222 is turned on again to store water in the second storage tank 22 to the first liquid level, and then the test is repeated.
Further, in one or more exemplary embodiments of the present invention, the evacuation tube group 60 includes an exhaust tube 61 and a drain tube 62.
Further, in one or more exemplary embodiments of the present invention, the bank of tanks 20 is provided with a pressure relief valve to facilitate adjustment of pressure changes between the two sets of tests. For example, when the pressure requirement for a post-test is low, the pressure of the bank of tanks 20 may be adjusted to meet the requirement by the pressure relief valve without the need for emptying refill gas.
Further, in one or more exemplary embodiments of the present invention, a simulation test method for gas-liquid two-phase leakage in a valve, the method uses a simulation test apparatus for gas-liquid two-phase leakage in a valve according to any one of the above technical solutions, and the simulation test method for gas-liquid two-phase leakage in a valve at least includes the following steps: selecting a valve to be tested, a flowmeter and a mode; inflating the tank battery 20; in the liquid phase mode, the second storage tank 22 is filled with water; and opening the test pipeline to detect the inner leakage.
Further, in one or more exemplary embodiments of the present invention, the step of inflating the bank of tanks further comprises inflating the instrument wind tank 30.
Further, in one or more exemplary embodiments of the present invention, after the test is finished, the gas-liquid two-phase simulation test device leaks into the valve.
Further, in one or more exemplary embodiments of the present invention, the inner leak detection employs a non-destructive detection. Preferably, the non-destructive inspection is an acoustic emission inspection.
Further, in one or more exemplary embodiments of the present invention, the simulation test device for gas-liquid two-phase leakage in the valve may be controlled by a PLC controller, which is simple and efficient.
The present invention will be described in more detail by way of specific examples, which should be construed as being illustrative only and not limiting.
Example 1
Referring to fig. 1, in the two-phase simulation test device for gas-liquid leakage in a valve of the present embodiment, a flow meter group 40 includes a first gas flow meter 411 (with a range of 0 to 2,000SLM), a second gas flow meter 412 (with a range of 0 to 120,000SLM), a first liquid flow meter 421 (with a range of 0 to 100SLM) and a second liquid flow meter 422 (with a range of 100 to 1,200 SLM); the valve group 50 to be tested comprises a DN50 gate valve, a DN80 ball valve, a DN100 stop valve, a DN150 gate valve, a DN200 ball valve and a DN250 gate valve.
In this embodiment, the inner leakage of the gate valve in the simulation test DN50 is selected, the first gas flowmeter 411 is selected, the first gas phase mode is adopted, the preset second pressure value is 1MPa, and the third pressure value is 0.5 MPa.
The experimental procedure for this example is as follows: inflating the instrument wind tank 30 to reach a set pressure, wherein the instrument wind tank 30 provides instrument wind in the test process; the first storage tank 21 is inflated to 1MPa (second pressure value), the inflation valve 211 is closed, the regulating valve 221 is opened, and after the first storage tank 21 releases pressure to the second storage tank 22 and inflates to 0.5MPa (third pressure value), the regulating valve 221 is automatically closed. And opening the test pipeline and starting the simulation test. In the test process, when the pressure in the second storage tank 22 is lower than 0.5MPa (third pressure value), the regulating valve 221 is automatically opened to keep the pressure in the test pipeline stable.
Example 2
In this embodiment, after the test of embodiment 1, the internal leakage of the shut-off valve in the simulation test DN100 is selected, the first gas flowmeter 411 is selected, the first gas phase mode is adopted, the preset second pressure value is 2MPa, and the third pressure value is 0.7 MPa.
The experimental procedure for this example is as follows: inflating the instrument wind tank 30 to reach a set pressure, wherein the instrument wind tank 30 provides instrument wind in the test process; the first storage tank 21 is inflated to 2MPa (second pressure value), the inflation valve 211 is closed, the regulating valve 221 is opened, and after the first storage tank 21 releases pressure to the second storage tank 22 and inflates to 0.7MPa (third pressure value), the regulating valve 221 is automatically closed. And opening the test pipeline and starting the simulation test. In the test process, when the pressure in the second storage tank 22 is lower than 0.7MPa (third pressure value), the regulating valve 221 is automatically opened to keep the pressure in the test pipeline stable. In the embodiment, each storage tank is inflated on the basis of the embodiment 1, so that only a small amount of gas needs to be supplemented, the inflation time is shortened, the test efficiency is improved, and the test resources are saved.
Example 3
In this embodiment, the device in embodiment 1 is obtained by selecting the inner leakage of the gate valve DN150 in the simulation test, selecting the second gas flow meter 412, and adopting the second gas phase mode, wherein the preset fourth pressure value is 1.5 MPa.
The experimental procedure for this example is as follows: inflating the instrument wind tank 30 to reach a set pressure, wherein the instrument wind tank 30 provides instrument wind in the test process; the control valve 221 is normally opened, and the first tank 21 and the second tank 22 are simultaneously charged to 1.5MPa (fourth pressure value), and then the charge valve 211 is closed. And opening the test pipeline and starting the simulation test. In the test process, when the opening of the DN150 gate valve is set to be 10%, the pressure in the test pipeline can be kept stable for more than 15 minutes. In this embodiment, the simulated leakage is larger, so the second gas phase mode is selected, and the first storage tank 21 and the second storage tank 22 are simultaneously inflated, so that the test pressure can be kept stable for a longer time, the frequent opening and closing of the regulating valve 221 can not be caused, and the loss and pressure fluctuation of the regulating valve can be reduced.
Example 4
The embodiment is the device in embodiment 1, carries out the liquid phase test, selects the interior hourglass of simulation test DN100 stop valve, chooses first fluidflowmeter 421 for use, adopts the liquid phase mode, predetermines first pressure value and is 1MPa, and first liquid level is 100%, and the second liquid level is 10%, and the liquid level uses the percentage measurement of the height of second storage tank 22.
The experimental procedure for this example is as follows: inflating the instrument wind tank 30 to reach a set pressure, wherein the instrument wind tank 30 provides instrument wind in the test process; the first tank 21 is charged to 1MPa (first pressure value), the charge valve 211 is closed, the liquid inlet 222 is opened, and the second tank 22 is charged to the first liquid level. The liquid inlet 222 is closed, the regulating valve 221 is opened, the test pipeline is opened, the first storage tank 21 is pressed towards the second storage tank 22, the liquid in the second storage tank 22 enters the test pipeline through pressure, and the simulation test is started. During the test, when the liquid level in the second storage tank 22 is lower than the second liquid level, the liquid inlet 222 is opened again to store water in the second storage tank 22 to the first liquid level, and then the test is repeated.
Example 5
The present embodiment is the apparatus in embodiment 1, and is used for performing a liquid phase test, selecting an inner leak of a gate valve DN250 of a simulation test, selecting a second liquid flow meter 422, and adopting a liquid phase mode, wherein a preset first pressure value is 0.5MPa, a preset first liquid level is 100%, and a preset second liquid level is 10%.
The experimental procedure for this example is as follows: inflating the instrument wind tank 30 to reach a set pressure, wherein the instrument wind tank 30 provides instrument wind in the test process; the first tank 21 is charged to 0.5MPa (first pressure value), the charging valve 211 is closed, the liquid inlet 222 is opened, and the second tank 22 is charged to the first liquid level. The liquid inlet 222 is closed, the regulating valve 221 is opened, the test pipeline is opened, the first storage tank 21 is pressed towards the second storage tank 22, the liquid in the second storage tank 22 enters the test pipeline through pressure, and the simulation test is started. During the test, when the liquid level in the second storage tank 22 is lower than the second liquid level, the liquid inlet 222 is opened again to store water in the second storage tank 22 to the first liquid level, and then the test is repeated.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.
Claims (13)
1. The utility model provides a leak two-phase analogue test device of gas-liquid in valve which characterized in that includes:
the storage tank group comprises a first storage tank and a second storage tank, the first storage tank is connected with the second storage tank through a regulating valve, the second storage tank is provided with a liquid inlet,
the air compressor is connected with the first storage tank through an inflation valve; and
a test pipeline connected with the downstream of the second storage tank, the test pipeline is connected with a flowmeter group, a valve group to be tested and an emptying pipe group in series in sequence,
in the liquid phase mode, the regulating valve is closed, the inflation valve is opened, the first storage tank is inflated to a first pressure value, the liquid inlet is opened, and the second storage tank stores water to a first liquid level; in a first gas phase mode, the regulating valve is closed, the inflation valve is opened, the first storage tank is inflated to a second pressure value first, the inflation valve is closed, the regulating valve is opened, and the second storage tank is inflated to a third pressure value.
2. The device for simulating gas-liquid two-phase test of leakage in a valve according to claim 1, further comprising:
and the instrument air tank is connected with the air compressor and provides instrument air for the storage tank group.
3. The gas-liquid two-phase simulation test device for gas leakage in the valve according to claim 1, wherein the flow meter group comprises at least two gas flow meters with different measuring ranges and at least two liquid flow meters with different measuring ranges; the valve group to be tested comprises a plurality of valves to be tested.
4. The gas-liquid two-phase simulation test device for gas leakage in the valve according to claim 1, wherein the evacuation pipe group comprises an exhaust pipe and a drain pipe.
5. The gas-liquid two-phase simulation test device for gas leakage in the valve according to claim 1, wherein the storage tank set is provided with a pressure relief valve.
6. The gas-liquid two-phase simulation test device for gas leakage in the valve according to claim 1, wherein the second storage tank is provided with a liquid level sensor.
7. The gas-liquid two-phase simulation test device for gas leakage in the valve according to claim 1, wherein in the second gas phase mode, the regulating valve is in a normally open state, the inflation valve is opened, and the first storage tank and the second storage tank are inflated to a fourth pressure value simultaneously.
8. A simulation test method for gas-liquid two-phase leakage in a valve is characterized in that the simulation test method for gas-liquid two-phase leakage in the valve is the simulation test device for gas-liquid two-phase leakage in the valve as set forth in any one of claims 1 to 7, and the simulation test method for gas-liquid two-phase leakage in the valve at least comprises the following steps:
selecting a valve to be tested, a flowmeter and a mode;
inflating the tank set;
in the liquid phase mode, storing water in the second storage tank;
and opening the test pipeline to perform inner leakage detection.
9. The method for simulating gas-liquid two-phase testing of leakage in a valve according to claim 8, wherein the step of inflating the tank set further comprises inflating an instrument wind tank.
10. The method for simulating gas-liquid two-phase test of leakage in a valve according to claim 8, further comprising the steps of: and after the test is finished, emptying the gas-liquid two-phase simulation test device leaked in the valve.
11. The method for the gas-liquid two-phase simulation test of the internal leakage of the valve according to claim 8, wherein the internal leakage detection is performed by acoustic emission.
12. The method for the gas-liquid two-phase simulation test of the leakage in the valve according to claim 8, wherein the gas-liquid two-phase simulation test device of the leakage in the valve is controlled by a PLC (programmable logic controller).
13. The method for simulating gas-liquid two-phase test of leakage in a valve according to claim 8, further comprising the steps of: in the liquid phase mode, an alarm signal is sent when the liquid level of the second tank is lower than a second liquid level.
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| CN114486114A (en) * | 2021-12-17 | 2022-05-13 | 中煤科工集团武汉设计研究院有限公司 | Slurry pressure pipeline leakage test device and use method |
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