CN115862910A - Isolation valve leakage measuring device and method, computer equipment and storage medium - Google Patents
Isolation valve leakage measuring device and method, computer equipment and storage medium Download PDFInfo
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Abstract
The invention discloses an isolation valve leakage measuring device and method, computer equipment and a storage medium, wherein the isolation valve leakage measuring method is applied to the isolation valve leakage measuring device and comprises the following steps: s1: acquiring normal gas flow parameters collected by a gas flowmeter under test pressure; s2: acquiring a gas space pressure value acquired by a pressure gauge; s3: and obtaining the leakage rate of the isolation valve according to the normal gas flow parameter and the gas space pressure value. The invention can complete the leakage measurement work of the mechanical penetration piece isolation valve only by the gas flowmeter, and reduces the configuration of 2 sets of water meters by a water method. Contamination and damage to the components is not easily encountered. The flowmeter is not in direct contact with radioactive water, is not easy to pollute and can be transported to the outside of a control area for verification. The device has the advantages of strong universality and wide application range, reduces safety risk, saves manpower and reduces the requirement of test manpower.
Description
Technical Field
The invention relates to the technical field of nuclear power, in particular to a device and a method for measuring leakage of an isolation valve, computer equipment and a storage medium.
Background
The isolation valve of the mechanical penetration piece of the nuclear island is an isolation valve penetrating through a pipeline system of a containment vessel and needs to be kept in a closed state under accident conditions such as a primary circuit large break, a secondary circuit steam pipeline large break and the like. The purpose of the mechanical penetrating piece isolation valve tightness test is to verify the tightness of the containment mechanical penetrating piece isolation valve under the containment design pressure and ensure the integrity of the containment serving as a third barrier function. And the mechanical penetration piece isolation valve sealing test verifies the sealing performance of the isolation valve with the isolation function inside and outside the containment. Mechanical penetration isolation valve seal testing determines the use of certain methods based on the media flowing within the penetration. When the nuclear power station is overhauled, the medium in some pipelines is water and the water is difficult to drain, and at the moment, the flow meter and the pipelines need to be filled with water and then the water is used for testing. The test is performed in a radioactive environment and the device may be exposed to the radioactive medium water.
For the sealing test of the mechanical penetrating piece isolation valve of the aqueous medium, the original test method is the direct measurement method of the aqueous method, namely a liquid flowmeter is connected to a measured valve to directly measure the leakage rate of the valve, and the test method necessarily requires that the used flowmeter needs to be filled with fluid with the same medium as that in a pipeline. However, when the nuclear power station is overhauled, some medium in the pipeline is water, and water is difficult to drain, so that only the water medium can be used for testing. The flow meter and line are then filled with water and the measurement is taken.
The measurement method has the following defects:
1) Because the medium of isolation valve is different, partial experiment uses the gas flowmeter when leading to the power station overhaul, and partial experiment needs to use the fluidflowmeter, and the suitability is not high, therefore the power station need dispose gas flowmeter and fluidflowmeter simultaneously, and equipment cost is higher.
2) When adopting liquid flowmeter to measure, be full of water in the liquid flowmeter, and measured valve department aqueous medium probably is radioactive aqueous medium, has the medium risk of flowing backwards, and consequently liquid flowmeter operational environment is comparatively abominable, easily appears polluting the condition, when appearing in the liquid flowmeter and polluting the condition, because liquid flowmeter internal pipeline is thinner, and there are many bends, in case stain back decontamination difficulty, lead to the on-the-spot most unable laboratory of transporting outside the control area of liquid flowmeter who uses to examine and determine, the sampling difficulty.
3) The original test method needs a water tank with larger volume to store the water medium for pressurizing, the empty weight of the test container 1 is about 50 kilograms, the volume is 40L, the total weight is about 100 kilograms after the test container is filled with water, and the test container is difficult to carry. During the test, the water-taking water source is required to be carried back and forth at a test site, and at least 5 testers are required to be matched for implementation.
Disclosure of Invention
The invention provides a leakage measuring device and method for an isolation valve, computer equipment and a storage medium, and aims to solve the technical problems that the existing leakage rate calculating device is high in cost and a contaminated liquid flowmeter is easy to exist.
The technical scheme adopted by the invention for solving the technical problems is as follows: the isolating valve leakage measuring device comprises a test device, an acquisition module and a processing module, wherein the test device is connected with the isolating valve, the acquisition module is in communication connection with the test device, and the processing module is in communication connection with the acquisition module;
the testing device comprises a testing container, an air inlet pipeline, a water conveying pipeline, a gas flowmeter and a pressure gauge, wherein the air inlet pipeline is connected with the testing container and is used for being connected with an air source, the water conveying pipeline is respectively connected with the testing container and the isolating valve, the gas flowmeter and the pressure gauge are arranged on the air inlet pipeline, part of water is arranged in the testing container so as to divide the interior of the testing container into a gas space and a water body space, the gas space is communicated with the air inlet pipeline, and the water body space is communicated with the water conveying pipeline;
the acquisition module is used for acquiring normal flow parameters of the gas flowmeter and a gas space pressure value displayed by the pressure gauge;
and the processing module obtains a gas space flow parameter according to the normal gas flow parameter and the gas space pressure value, and obtains the isolation valve leakage rate of the isolation valve.
In some embodiments, the processing module obtains the leak rate of the isolation valve by the calculation formula:
wherein Q is leak To isolate valve leakage rate, Q v Qi Is a normal gas flow parameter; pc is the pressure value of the gas space displayed by the pressure gauge, and 5.2bar.a is taken; c is a gas-liquid conversion coefficient.
In some embodiments, the gas-liquid conversion factor is 171 or 171.6.
In some embodiments, the test device further comprises a pressure relief valve disposed proximate the gas source for regulating and maintaining a constant pressure of the test device.
In some embodiments, the testing apparatus further comprises a liquid level meter for displaying a value of a descending volume of the water body space.
The invention also provides an isolation valve leakage measuring method which is applied to the isolation valve leakage measuring device in any embodiment and comprises the following steps:
s1: acquiring normal gas flow parameters collected by a gas flowmeter under test pressure;
s2: acquiring a gas space pressure value acquired by a pressure gauge;
s3: and obtaining the leakage rate of the isolation valve according to the normal gas flow parameter and the gas space pressure value.
In some embodiments, in S3, the calculation formula of the leakage rate of the isolation valve is:
wherein Q is leak To isolate valve leakage rate, Q v Qi Is a normal gas flow parameter; pc is a gas space pressure value acquired by a pressure gauge, and 5.2bar.a is taken; c is a gas-liquid conversion coefficient.
In some embodiments, the gas-liquid conversion factor C is 171 or 171.6.
The present invention further provides a computer device, including a memory and a processor, where the memory stores a computer program operable on the processor, and the processor is configured to implement the steps of the method for measuring leakage of an isolation valve according to any of the above embodiments when executing the computer program.
The present invention also provides a storage medium storing a computer program which, when executed, implements the steps of the method of measuring leakage of an isolation valve according to any of the embodiments described above.
The implementation of the invention has the following beneficial effects: the application of the invention can save the cost: whether the medium in the pipeline is air or water, only a gas flow meter is needed on site, and the use of a water flow meter is eliminated. Each power station can complete the leakage measurement work of the mechanical penetration piece isolation valve only by a gas flowmeter, and 2 sets of water meter configurations by a water method are reduced. The reliability of the equipment is improved: because the gas flowmeter no longer directly contacts with radioactive aqueous medium, the contamination and damage of parts are not easy to occur. The problems of flowmeter verification are solved: the flowmeter is not in direct contact with radioactive water, is not easy to pollute and can be transported to the outside of a control area for verification. The universality is strong, the application range is wide: it can be applied to all mechanical penetration isolation valve leakage measurements tested by water method. And (3) reducing the safety risk: the flowmeter is not directly contacted with radioactive aqueous medium, so that the radiation protection risk is reduced. Manpower is saved: can use the water pitcher that the volume is less, cancel experimental container even, reduce equipment transportation work load, reduce experimental manpower demand.
Drawings
In order to explain the technical solutions of the present invention more clearly, the present invention will be further described with reference to the accompanying drawings and examples, it being understood that the following drawings only show some examples of the present invention and therefore should not be considered as limiting the scope, and that for a person skilled in the art, other relevant drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of the construction of a test device in some embodiments of the invention;
FIG. 2 is a schematic diagram of the construction of a test device in some embodiments of the invention;
FIG. 3 is a schematic diagram of a virtual control volume in some embodiments of the invention;
FIG. 4 is a flow chart of an isolation valve leakage measurement method in some embodiments of the invention.
Detailed Description
For a more clear understanding of the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it is to be understood that the orientations and positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "lateral", "vertical", "horizontal", "top", "bottom", "inner", "outer", "leading", "trailing", and the like are configured and operated in specific orientations based on the orientations and positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate that the device or element referred to must have a specific orientation, and thus, are not to be construed as limiting the present invention.
It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are merely for convenience in describing the present technical solution and are not to be construed as indicating or implying any relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Referring to fig. 1 to fig. 3, the present invention discloses an isolation valve leakage measurement apparatus for performing leakage measurement on an isolation valve, and is particularly suitable for leakage measurement of an isolation valve of a mechanical penetration assembly.
The isolation valve leakage measurement device may include a testing device, an acquisition module, and a processing module. The test device is connected with the isolation valve, the acquisition module is in communication connection with the test device, and the processing module is in communication connection with the acquisition module;
the testing device comprises a testing container 1, an air inlet pipeline 2 connected with the testing container 1 and used for being connected with an air source, a water conveying pipeline 3 respectively connected with the testing container 1 and an isolation valve 10, and a gas flowmeter 6 and a pressure gauge 7 which are arranged on the air inlet pipeline 2, wherein part of water is arranged in the testing container 1 so as to divide the interior of the testing container 1 into a gas space and a water body space, the gas space is communicated with the air inlet pipeline 2, and the water body space is communicated with the water conveying pipeline 3;
the acquisition module is used for acquiring the normal flow parameter of the gas flowmeter 6 and the gas space pressure value displayed by the pressure gauge 7, and the processing module acquires the gas space flow parameter according to the normal gas flow parameter and the gas space pressure value and acquires the isolation valve leakage rate of the isolation valve 10.
Preferably, the processing module obtains the leak rate of the isolation valve by the calculation formula:
wherein Q is leak To isolate valve leakage rate, Q v Qi Normal gas flow parameters; pc is the pressure value of the gas space displayed by the pressure gauge, and 5.2bar.a is taken; c is a gas-liquid conversion coefficient.
Preferably, the gas-liquid conversion factor is 171 or 171.6.
In some embodiments, the test unit further comprises a pressure relief valve 5, the pressure relief valve 5 being disposed proximate to the gas source for regulating and maintaining the pressure of the test unit constant. Preferably, the pressure reducing valve 5 may be provided on the side of the inlet line 2 close to the gas source.
In some embodiments, the testing apparatus further comprises a liquid level meter 4, the liquid level meter 4 being configured to display a value of a descending volume of the water body space. Preferably, the level gauge 4 may be provided on the test vessel 1. The test vessel 1 may be a vertical vessel, which may be made of stainless steel.
In some embodiments, the test unit further comprises a gas meter control valve 8 provided on the gas inlet line 2.
The isolation valve leakage measuring device is applied as follows: the gas flow meter 6 is connected upstream to a gas source and pressurized, the gas flow meter 6 is connected to the gas space in the upper part of the test vessel 1, the test vessel 1 holds a certain amount of water, but is not completely filled, and the lower part holds water. The water side of the test vessel 1 is connected to the isolation valve 10. The amount of water leaked can be calculated according to the fact that the flow rate of the gas flowing through the gas flow meter 6 is equal to the volume of the water leaked from the isolation valve 10 when the pressure is stable.
Further, the gas source is connected to a pressure reducing valve 5, the pressure reducing valve 5 is connected to a gas flow meter 6, the gas flow meter 6 is connected to the test vessel 1, and the test vessel 1 is connected to an isolation valve 10. The water transmission pipeline 3 between the lower half part of the test container 1 and the isolation valve 10 and the test container 1 are filled with water.
The pressure reducing valve 5 is connected with a gas source and is adjusted to a containment design Pressure (PC) (5.2bar. A), the containment design pressure is a test pressure, the lower part of the test container 1 holds water, the water side of the test container 1 is connected to the upstream of an isolation valve 10, a control valve 9 of the test container 1 is opened, the isolation valve 10 is closed, and compressed air can completely pressurize a pipeline between the gas flowmeter 6 and the measured valve 10 to the Pc.
And (3) closing the gas source after pressurizing for a period of time, observing the pressure condition through the pressure gauge 7, and if the pressure reaches Pc and does not have a rapid descending trend, opening the gas source to continuously maintain the pressure of Pc, and observing the reading of the gas flowmeter 6.
After a period of time, the pressure is stable, then the reading of the gas flowmeter 6 is stable, the acquisition module acquires the normal flow parameter of the gas flowmeter 6, and the processing module can calculate the leakage rate of the isolation valve 10 according to the reading of the gas flowmeter 6.
The invention also discloses an isolation valve leakage measuring method, which is applied to the isolation valve leakage measuring device and comprises the following steps:
s1: acquiring normal gas flow parameters collected by a gas flowmeter under test pressure;
s2: acquiring a gas space pressure value acquired by a pressure gauge;
s3: and obtaining the leakage rate of the isolation valve according to the normal gas flow parameter and the gas space pressure value.
Preferably, in S3, the calculation formula of the leakage rate of the isolation valve is as follows:
wherein Q is leak To isolate valve leakage rate, Q v Qi Is a normal gas flow parameter; pc is a gas space pressure value acquired by a pressure gauge, and 5.2bar.a is taken; c is a gas-liquid conversion coefficient.
Preferably, the gas-liquid conversion coefficient C is 171 or 171.6.
In this embodiment, since the leakage amount of the isolation valve 10 is relatively small and much smaller than the capability of the gas source to supplement the gas, the pressure difference from the gas flowmeter 6 to the isolation valve 10 is extremely small when the pressure is stable, and it is considered that the pressures of the gas space and the gas space are both maintained at Pc for simplification. At this time, since the balance between the leakage of water and the replenishment of gas is maintained, the fluid state at other positions except for the lowering of the liquid level at the boundary between water and gas can be regarded as a steady state.
As shown in fig. 2, the space between the gas flowmeter 6 and the isolation valve 10, which is circled by the dashed line, is a virtual control body, and includes an outlet of the gas flowmeter 6, an air inlet pipeline 2, a test container 1, an air inlet pipeline 3, and the like. After the gas flowmeter 6 pressurizes Pc, the pressure of the whole virtual control body is stabilized at Pc, and the isolating valve 10 has water leakage Q Pc water v While at the same time there is a flow Q of gas at the gas meter 6 flowing into the virtual control body Pc gas v 。
At time t, the volume of the air space is V Gas t Volume of water space V Water t . Over time Δ t, the volume of the gas space becomes V Gas t' Volume of water space becomes V T 'of water' During this time the liquid level drops by Δ h, and the volume change due to the drop in liquid level Δ h is dV.
V Gas t' ＝V Gas t +dV
V T 'of water' ＝V Water t -dV
When the leakage rate is measured, the whole pressure in the virtual control body is kept to be Pc, the gas is not expanded or compressed, and the gas volume is changed from V Gas t Change to V Gas t' Due to gas inflow at allThe resulting, therefore, gas volume flow q flowing in at times can be determined v Qi 。
Integrating the above formula to obtain a gas volume flow formula:
for water, there is no expansion and compression, and the water volume is from V Gas t Change to V Gas t' Is entirely due to the water outflow, so that the volume flow q of water flowing out within the time Δ t can be determined Pc water v ：
Integrating the above formula to obtain a water volume flow formula, wherein Q v water Negative values indicate water flowing out of the virtual control volume.
The relationship between the water leakage from the isolation valve 10 and the supplementary gas flow in the case of pressure stabilization is thus established:
for water, there is no expansion and compression, and the water volume is from V Gas t Change to V Gas t' Entirely due to water outflow, it is therefore possible to derive the time atVolume flow rate q of the water flowing out Pc water v ：
Integrating the above formula to obtain a water volume flow formula, wherein Q v water Negative values indicate water flowing out of the virtual control volume.
The relationship between the water leakage from the isolation valve 10 and the supplementary gas flow in the case of pressure stabilization is thus established:
the volume of the virtual control body is unchanged, the flow is in a steady state when the pressure is stable, and the inflow volume flow is equal to the outflow volume flow. Thus, the volumetric flow of gas through the gas meter 6 is equal to the volumetric flow of water leaking through the isolation valve 10.
Further, since the acceptance criterion for the mechanical penetration isolation valve test is the air leakage rate, when water is used as the test medium, the measured water leakage rate is converted to the air leakage rate under the same valve condition.
The leakage measured by the mechanical penetration piece isolation valve test is the leakage caused by a tiny gap of a sealing surface under the condition that the valve is closed. The narrow slit width e is 0.01mm order of magnitude, the width L of the sealing surface is 10 mm-700 mm,
leakage can therefore be assumed to be an infinite flat slot model. In such a narrow gap, the viscous force acts much more than the inertial force, and the flow state is laminar.
According to the 'Couette-Poiseuille flow between two flat plates', the volume flow of the narrow slit under the infinite flat narrow slit laminar flow model is as follows:
the volume flow in the above formula is the volume flow under the local pressure, and needs to be converted into the volume flow under the atmospheric pressure. It is considered incompressible for water and the volume does not change with pressure. Air needs to be brought to local pressure
Converted to a flow at atmospheric pressure Patm. The expression for volumetric flow per length of valve seat surface is thus derived as follows:
for water:
for air:
wherein: p1: upstream pressure, P1=5.2bar.a; p2 downstream pressure, 1bar.a; e: the gap between the sealing surfaces is in meters; l: the width of the sealing surface in meters; q vwtaer : the volume flow rate of water is 20 ℃ and the atmospheric pressure is reduced; q vair : air volume flow, 20 ℃, at atmospheric pressure; u: kinetic viscosity coefficient of water, u =1.01 x 10 at 20 ℃ -3 Pa · s; u': kinetic viscosity coefficient of air, u' =1.808 x 10 at 20 ℃ -5 Pa · s; patm: atmospheric pressure, 1bar.
The above formula (1) and formula (2) are divided to obtain:
substituting the correlation values, we can obtain:
in the above formula, i.e. the conversion formula for converting the water-based medium leakage rate of the valve into the gas-based medium leakage rate under the same valve state is that for the convenience of calculation, 171 is generally taken as a conversion coefficient, i.e. the conversion coefficient C is 171, and of course, 171.6 may be used as the conversion coefficient C.
Further, in S3, the volume flow rate Q of air at the test pressure Pc is calculated Pc gas v . Flow rate Q read by gas flowmeter 6 v Qi The unit is volume flow at 20 deg.C under atmospheric pressure, and is converted into flow Q at 20 deg.C under Pc pressure Pc gas v . According to the ideal gas equation of state, the volume of a mass of gas is inversely proportional to the pressure:
further, the volume flow rate Q of water is calculated Pc water v The volumetric flow rate of the gas flowing through the flow meter is equal to the volumetric flow rate of the water leaking from the isolation valve 10.
Q Pc water v ＝Q Pc gas v
Further, the flow rate Q of water at 20 ℃ under atmospheric pressure was calculated v water . Since water is essentially incompressible, the density ρ of water at 20 ℃ under Pc (5.2 bar.g) pressure Water Pc =998.5022kg/m3, density ρ of water under atmospheric pressure Water (W) =998.302kg/m3, and ρ is assumed to be Water (I) ＝ρ Water Pc 。
The leak rate of the same isolation valve 10 when gas is the medium was calculated. Because the test medium is water, the medium filled in the pipeline may be air in an actual accident, and at this time, the leakage rate of water needs to be converted into the leakage rate of air in the same state of the isolation valve 10, wherein the conversion coefficient C is 171 or 171.6, and a calculation formula of the leakage rate of the isolation valve can be obtained:
the leak rate of an isolation valve 10, such as a mechanical feedthrough isolation valve, can be derived from the measured parameters of the gas flow meter 6 at steady pressure according to this calculation.
The present invention also provides a computer device, including a memory and a processor, where the memory stores a computer program executable on the processor, and the processor implements the steps of the isolation valve leakage measurement method according to any of the above embodiments when executing the computer program.
The present invention also provides a storage medium storing a computer program which, when executed, implements the steps of the isolation valve leakage measurement method of any of the embodiments described above.
The application of the invention can save the cost: whether the medium in the pipeline is air or water, only a gas flow meter is needed on site, and the use of a water flow meter is eliminated. Each power station can complete the leakage measurement work of the mechanical penetration piece isolation valve only by a gas flowmeter, and 2 sets of water meter configurations by a water method are reduced. The reliability of the equipment is improved: because the gas flowmeter is not in direct contact with radioactive aqueous medium any more, the contamination and damage of parts are not easy to occur. The problems of flowmeter verification are solved: the flowmeter is not in direct contact with radioactive water, is not easy to pollute and can be transported to the outside of a control area for verification. The universality is strong, the application range is wide: it can be applied to all mechanical penetration isolation valve leakage measurements tested by water method. And (3) reducing the safety risk: the gas flowmeter is not directly contacted with radioactive aqueous medium, so that the radiation protection risk is reduced. Manpower is saved: can use the water pitcher that the volume is less, cancel experimental container even, reduce equipment transportation work load, reduce experimental manpower demand.
It should be noted that the various aspects described in this disclosure may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or in combinations of them. May also be embodied by a computer program product. These computer programs are embodied in an information carrier, such as a machine-readable storage device or a propagated signal, which is executable by or for controlling the operation of data processing apparatus, such as a programmable processor, a computer, or multiple computers. A computer program, such as the one described above, can be written in any form of programming language, including compiled or interpreted languages, and can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network.
Method steps may be performed by one or more programmable processors executing a computer program to perform functions by operating on input data and generating output data. Method steps also may be performed by, and apparatus may be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit).
Processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor can receive instructions and data from a read-only memory or a random access memory or both. The computer components include at least one processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto-optical disks, or optical disks. Information carriers suitable for embodying computer program instructions and data include all forms of non-volatile memory, including semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory, magnetic disks such as internal hard disks or removable disks, magneto-optical disks, and CD-ROM and DVD-ROM optical disks. The processor and the memory can be implemented by, or incorporated in, special purpose logic circuitry.
The invention can also be implemented in a computer system that includes a back-end component, e.g., as a data server, or that includes a middleware component, e.g., an application server, or that includes a front-end component, e.g., a client computer having a graphical user interface or a Web browser through which a user can interact to implement the invention, or any combination of such back-end, middleware, or front-end components. The components may be interconnected by any form or medium of digital data communication, e.g., a communication network. Examples of communication networks include a Local Area Network (LAN) and a Wide Area Network (WAN), such as the Internet.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. An isolation valve leakage measuring device is used for leakage measurement of an isolation valve and is characterized by comprising a testing device, an acquisition module and a processing module, wherein the testing device is connected with the isolation valve, the acquisition module is in communication connection with the testing device, and the processing module is in communication connection with the acquisition module;
the testing device comprises a testing container, an air inlet pipeline, a water conveying pipeline, a gas flowmeter and a pressure gauge, wherein the air inlet pipeline is connected with the testing container and is used for being connected with an air source, the water conveying pipeline is respectively connected with the testing container and the isolating valve, the gas flowmeter and the pressure gauge are arranged on the air inlet pipeline, part of water is arranged in the testing container so as to divide the interior of the testing container into a gas space and a water body space, the gas space is communicated with the air inlet pipeline, and the water body space is communicated with the water conveying pipeline;
the acquisition module is used for acquiring normal flow parameters of the gas flowmeter and a gas space pressure value displayed by the pressure gauge;
and the processing module obtains a gas space flow parameter according to the normal gas flow parameter and the gas space pressure value, and obtains the isolation valve leakage rate of the isolation valve.
2. The isolation valve leak measurement device of claim 1, wherein the processing module obtains the isolation valve leak rate by the calculation formula:
wherein Q leak To isolate valve leakage rate, Q v Qi Is a normal gas flow parameter; pc is the pressure value of the gas space displayed by the pressure gauge, and 5.2bar.a is taken; c is a gas-liquid conversion coefficient.
3. The isolation valve leakage measurement device of claim 2, wherein the gas-liquid conversion factor is 171 or 171.6.
4. The isolation valve leakage measurement device of any of claims 1 to 3, wherein the test unit further comprises a pressure relief valve disposed proximate the gas source for regulating and maintaining the pressure of the test unit constant.
5. The isolation valve leak measurement apparatus of claim 1, wherein the test apparatus further comprises a liquid level meter for displaying a value of a descending volume of the water space.
6. An isolation valve leakage measuring method applied to the isolation valve leakage measuring apparatus according to any one of claims 1 to 5, comprising the steps of:
s1: acquiring normal gas flow parameters collected by a gas flowmeter under test pressure;
s2: acquiring a gas space pressure value acquired by a pressure gauge;
s3: and obtaining the leakage rate of the isolation valve according to the normal gas flow parameter and the gas space pressure value.
7. The isolation valve leakage measurement method of claim 6, wherein in S3, the isolation valve leakage rate is calculated by the formula:
wherein Q is leak To isolate valve leakage rate, Q v Qi Is a normal gas flow parameter; pc is a gas space pressure value acquired by a pressure gauge, and 5.2bar.a is taken; c is a gas-liquid conversion coefficient.
8. The isolation valve leakage measurement method of claim 7, wherein the gas-liquid conversion factor C is 171 or 171.6.
9. A computer device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor, when executing the computer program, performs the steps of the isolation valve leakage measurement method of any of claims 6 to 8.
10. A storage medium, characterized in that it stores a computer program which, when executed, implements the steps of the isolation valve leakage measurement method of any one of claims 6 to 8.
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2022
- 2022-11-08 CN CN202211392124.XA patent/CN115862910A/en active Pending
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