CN111322123B - Offline verification device and method for hydrogen side control oil tank - Google Patents

Offline verification device and method for hydrogen side control oil tank Download PDF

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Publication number
CN111322123B
CN111322123B CN202010117387.4A CN202010117387A CN111322123B CN 111322123 B CN111322123 B CN 111322123B CN 202010117387 A CN202010117387 A CN 202010117387A CN 111322123 B CN111322123 B CN 111322123B
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oil
floating ball
valve
liquid level
valve body
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CN202010117387.4A
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CN111322123A (en
Inventor
刘正君
罗磊
李晓辉
李春光
庹钦财
朱英杰
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China General Nuclear Power Corp
CGN Power Co Ltd
China Nuclear Power Operation Co Ltd
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China General Nuclear Power Corp
CGN Power Co Ltd
China Nuclear Power Operation Co Ltd
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Priority to CN202010117387.4A priority Critical patent/CN111322123B/en
Publication of CN111322123A publication Critical patent/CN111322123A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
    • F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
    • F01D11/06—Control thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/02—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Control Of Non-Electrical Variables (AREA)

Abstract

The invention relates to an offline verification device and a verification method for a hydrogen side control oil tank, wherein the verification device comprises a tank body with a cylindrical structure, and the lower side of the tank body is provided with an oil supplementing valve component for controlling oil to enter an inner cavity of the tank body and an oil discharging valve component for controlling oil to be discharged out of the tank body; the oil supplementing valve assembly comprises an oil supplementing valve body, an oil inlet blocking plate is arranged on the oil supplementing valve body, and the oil inlet blocking plate is connected with the first control valve; the oil discharge valve assembly comprises an oil discharge valve body, an oil discharge blocking plate is arranged on the oil discharge valve body, and the oil discharge blocking plate is connected with the second control valve; a main pipe, an oil supplementing branch pipe and an air charging branch pipe which are respectively connected with the main pipe are arranged on the upper side of the box body; the overhaul quality, the economy and the safety are greatly improved; the control accuracy of the liquid level of the switch of the floating ball component can reach millimeter level, various fault points of equipment can be accurately locked and eliminated, and the safe and stable operation of the unit is guaranteed; effectively eliminate because of the unusual generator rotor oil feed and the liquid level of resulting in during airtight time of oil tank and hang down the great risk of the sealed oil pump of low hydrogen side and jump the pump.

Description

Offline verification device and method for hydrogen side control oil tank
Technical Field
The invention relates to the technical field of operation and maintenance of a nuclear power generator sealing oil system, in particular to a hydrogen side control oil tank offline verification device and a verification method thereof.
Background
The hydrogen side oil return control tank is an oil storage tank of the hydrogen side oil passage, and a certain oil level must be maintained during operation. It is composed of box body, oil-supplementing/discharging valve, liquid level indicator and low liquid level alarm switch.
Because the oil pressure in the hollow part and the hydrogen side of the sealing bush cannot be absolutely balanced, a small amount of oil still flows by each other on the hollow and hydrogen sides, and the oil quantity in the oil way on the hydrogen side can be increased or decreased due to long-term accumulation. Once this happens, the hydrogen side return oil control tank can automatically function as a control oil level.
As shown in fig. 1, when the oil level in the tank is high, the float (drain) opens the drain valve as the liquid level rises, and excess oil is drained to the inlet of the empty side seal oil pump. When the oil level of the oil tank is low, the floating ball (oil supplement) drives the oil supplement valve to open along with the reduction of the liquid level, so that the oil is supplemented after the empty side filter.
If the floating ball loses the automatic adjusting function, the oil supplementing and discharging valve can be forcibly opened and closed through the upper thimble and the lower thimble of the floating ball. The liquid level of the oil tank is kept stable within a qualified range through the opening degrees of the oil supplementing valve and the oil discharging valve.
In the existing function verification method after the hydrogen side control oil tank is overhauled in the field of electric power production/nuclear power generator sealing oil systems, the function of the oil tank needs to be verified until the airtight test period of a generator, and hidden defects in equipment and the adjusted liquid level of a floating ball valve switch are only shown at this stage.
The existing mode has the defects of poor economy and safety, and has larger risks to influence the overhaul period and the safety of equipment. The analysis was as follows:
1. the construction period is delayed, and the power generation of the unit is influenced: if the liquid level of the oil tank on the hydrogen side is too low or leakage occurs due to poor sealing caused by abnormal functions of the oil tank during the airtight period, the result of the airtight test is unqualified, and the time (about 2-4 days) for abnormal search, elimination and secondary airtight of the oil tank needs to be increased on the basis of the airtight test time of the generator;
2. threatening the safe operation of the steam turbine generator unit: if the liquid level of the hydrogen side oil tank continuously rises due to the abnormal function of the hydrogen side control oil tank, the serious risk of oil inlet of the generator caused by untimely intervention exists;
if the liquid level is too low, if the intervention is not timely, the pump jump of the hydrogen side sealing oil pump occurs, the hydrogen side loop is lost, and the unit is forced to stop running.
3. The existing mode can not ensure that the liquid level of a float valve switch is adjusted to a better opening point due to the limitation of a window.
Disclosure of Invention
The invention aims to provide an offline verification device and a verification method for a hydrogen side control oil tank.
The technical scheme adopted by the invention for solving the technical problems is as follows: the off-line verification device for the hydrogen side control oil tank comprises a tank body with a cylindrical structure, wherein an oil supplementing valve assembly for controlling oil to enter an inner cavity of the tank body and an oil discharging valve assembly for controlling oil to be discharged out of the tank body are arranged on the lower side of the tank body;
the oil supplementing valve assembly comprises an oil supplementing valve body, an oil inlet blocking plate is arranged on the oil supplementing valve body, and the oil inlet blocking plate is connected with the first control valve;
the oil discharge valve assembly comprises an oil discharge valve body, an oil discharge blocking plate is arranged on the oil discharge valve body, and the oil discharge blocking plate is connected with a second control valve;
the upper side of the box body is provided with a main pipe, and an oil supplementing branch pipe and an air charging branch pipe which are respectively connected with the main pipe.
Preferably, the tail end of the main pipe is provided with an exhaust port, and a fifth control valve is arranged at the exhaust port; the oil supplementing branch pipe is provided with a third control valve;
and a fourth control valve is arranged on the inflation branch pipe.
Preferably, the main pipe is further provided with a pressure detection meter for detecting the internal pressure of the box body.
Preferably, a first floating ball assembly is arranged in the box body, and the first floating ball assembly comprises a first floating ball connecting rod and a first floating ball connected with the first floating ball connecting rod;
a second floating ball assembly is arranged in the box body and comprises a second floating ball connecting rod and a second floating ball connected with the second floating ball connecting rod; the first floating ball and the second floating ball extend along opposite directions;
a first support rod connected with one end, far away from the first floating ball, of the first floating ball connecting rod and a first valve rod which is arranged close to the first support rod and connected with the first floating ball connecting rod are arranged inside the box body;
and a second supporting rod connected with one end of the second floating ball connecting rod, which is far away from the second floating ball, and a second valve rod which is arranged close to the second supporting rod and connected with the second floating ball connecting rod are arranged in the box body.
Preferably, the oil supplementing valve further comprises a first needle ejection valve which is arranged on the oil supplementing valve body and connected with the first valve rod;
and the second needle jacking valve is arranged on the oil discharge valve body and connected with the second valve rod.
Preferably, the fuel tank further comprises a fuel level indicator arranged on the tank body and used for measuring and displaying the fuel level inside the tank body.
A verification method for the hydrogen side control oil tank offline verification device comprises the following steps:
s1: closing the oil supplementing valve body, and keeping the oil discharging valve body in a free state;
s2: slowly filling lubricating oil from the oil supply branch pipe, observing the liquid level rising condition from the oil level indicator, closing the second control valve when observing that the oil leakage starts to occur in the oil discharge valve body, and recording the first liquid level H at the moment; continuing to charge the tank with oil to a second liquid level (H +20 mm) or above, closing the third control valve, opening the fourth control valve, and continuing to charge the tank to a preset pressure through the charging branch pipe;
s3: the second control valve is opened slightly and,observing the oil leakage condition of the outlet of the oil drain valve body, and when the outlet of the oil drain valve body stops leaking, indicating that the oil drain valve body is closed, namely the opening and closing liquid level H of the oil drain valve body Row board ；
S4: opening the oil supplementing valve body and confirming that the outlet of the oil supplementing valve body is not leaked;
s5: operating the third control valve to slightly open the oil discharge valve body for oil discharge, observing the oil leakage condition of the tank body liquid level and the oil inlet blocking plate, and recording the liquid level of the tank body when the oil leakage starts from the outlet of the oil supplementing valve body, namely the opening and closing liquid level H of the oil supplementing valve body Supplement device ；
S6: judging the H Row board And H Supplement device If not, readjusting the first floating ball assembly and the second floating ball assembly according to an adjustment calculation formula, and repeating the steps S1-S5 until the time H Row board And said H Supplement device And the preset standard is met.
Preferably, the adjustment calculation formula includes:
the first float assembly adjustment formula:
the formula for calculating the angle of the adjusted first floating ball connecting rod is as follows: cos (β 1) = cos (β 0) - γ 1 /L1；
The first valve stem being substantially adjustable by an amount δ 1 ＝-L2/L1×γ 1 ；
Wherein, γ 1 The amount of adjustment required for the liquid level, the liquid level up-regulation,. Gamma 1 Is a positive value; otherwise, the liquid level is lowered, γ 1 Is a negative value; delta. For the preparation of a coating 1 Negative, down-regulation, δ 1 If the value is positive, the value is adjusted upwards; beta 0 is a preset angle between a first floating ball connecting rod and a first support rod, beta 1 is an adjusting angle between the first floating ball connecting rod and the first support rod, L1 is the length from a connecting point of the first floating ball connecting rod and the first floating ball to a connecting point of the first support rod, and L2 is the length from the connecting point of the first floating ball connecting rod and the first support rod to a connecting point of the first support rod;
the second float assembly adjustment formula:
adjusted second float ball link angle calculationThe formula is as follows: cos (α 1) = cos (α 0) - γ 2 /；
The second valve stem being substantially adjusted by an amount delta 2 ＝L3/(L3+L4)×γ 2 ；
Wherein, γ 2 The amount of adjustment required for the liquid level, the liquid level up-regulation,. Gamma 2 Is a positive value; otherwise, the liquid level is lowered, γ 2 Is a negative value; delta 2 Negative, down-regulation, delta 2 If the value is positive, the value is adjusted upwards; alpha 0 is the preset angle between the second floating ball connecting rod and the first supporting rod, alpha 1 The adjusting angle between the second floating ball connecting rod and the second supporting rod is L3, the length from the connecting point of the second floating ball connecting rod and the second supporting rod to the connecting point of the second floating ball connecting rod and the second supporting rod is L4, and the length from the connecting point of the second floating ball connecting rod and the second floating ball connecting rod to the connecting point of the second floating ball connecting rod and the second supporting rod is L4.
The implementation of the invention has the following beneficial effects: the key path window of major repair is effectively avoided, the oil level of the hydrogen side of the sealing oil system is ensured to be in a qualified level in the ascending stage or during operation of the unit, and the overhauling quality and the economical efficiency and the safety during major repair are greatly improved; the switch liquid level of the floating ball assembly in the oil tank can be accurately positioned through an adjustment test, the liquid level control accuracy can reach a millimeter level, various fault points of equipment are accurately locked and eliminated, and the safe and stable operation of the unit is guaranteed; the major risk that the generator rotor oil inlet and the liquid level are low in hydrogen side sealing oil pump jump during airtight caused by the abnormal oil tank in the prior art is effectively eliminated.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of the overall structure of a hydrogen-side oil return control tank in the related art;
FIG. 2 is a schematic structural diagram of the hydrogen-side controlled fuel tank offline verification device of the invention;
FIG. 3 is a schematic diagram of the measurement of the size of the float ball assembly of the hydrogen side control fuel tank off-line verification device 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 should also be noted that, unless expressly specified or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and encompass, for example, fixed connections as well as removable connections or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. 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 only for convenience in describing the present technical solution, and are not to be construed as indicating or implying 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.
As shown in fig. 2, the hydrogen-side controlled fuel tank offline verification device of the present invention includes a cylindrical tank 1, and in the present embodiment, the tank 1 has a substantially cylindrical structure, but may have a square structure, and the structural shape thereof is not particularly limited. Further, the box body 1 comprises a box body with a hollow cylindrical structure, and a first end cover 11 and a second end cover 12 which are detachably mounted on two sides of the box body, and it can be understood that the floating ball assembly and the like in the box body 1 can be adjusted by detaching the end covers.
Furthermore, an oil supplementing valve component 2 for controlling oil to enter the inner cavity of the box body 1 and an oil discharging valve component 3 for controlling oil to be discharged out of the box body 1 are arranged at the lower side of the box body 1;
the oil supplementing valve component 2 comprises an oil supplementing valve body 21, an oil inlet blocking plate 22 is arranged on the oil supplementing valve body 21, and the oil inlet blocking plate 22 is connected with a first control valve 23;
the oil discharge valve assembly 3 comprises an oil discharge valve body 31, an oil discharge blocking plate 32 is arranged on the oil discharge valve body 31, and the oil discharge blocking plate 32 is connected with a second control valve 33;
the upper side of the box body 1 is provided with a main pipe 4, and an oil supplementing branch pipe 5 and an air charging branch pipe 6 which are respectively connected with the main pipe 4. Furthermore, an exhaust port is arranged at the tail end of the main pipe 4, a fifth control valve 41 is arranged at the exhaust port, a third control valve 51 is arranged on the oil supply branch pipe 5, and a fourth control valve 61 is arranged on the inflation branch pipe 6. The oil supply branch pipe 5 can be connected to an external oil transportation device to input oil into the tank 1, so as to simulate a real oil transportation situation, and the third control valve 51 can control the opening and closing and the speed of the oil transportation. The gas-filled branch pipe 6 can be connected with an external gas transmission device to input gas into the box body 1, so as to control the internal pressure of the box body 1 and further simulate the actual pressure environment, and the fourth control valve 61 can control the opening and closing and the speed of gas transmission.
Furthermore, the main pipe 4 is also provided with a pressure detection meter 7 for detecting the internal pressure of the box body 1. Alternatively, the pressure detecting gauge 7 may be provided to the gas-filled branch pipe 6, and of course, the pressure detecting gauge 7, a temperature detector, and the like may be provided to the tank 1 to ensure that the pressure meets a predetermined pressure as much as possible.
Further, a first float ball assembly 24 is arranged inside the tank 1, and the first float ball assembly 24 includes a first float ball connecting rod 241 and a first float ball 242 connected to the first float ball connecting rod 241.
The second float assembly 34 is disposed inside the box body 1, the second float assembly 34 includes a second float link 341 and a second float 342 connected to the second float link 341, and the first float 242 and the second float 342 extend in opposite directions.
A first support rod 25 connected with one end of the first float ball connecting rod 241 far away from the first float ball 242 and a first valve rod 26 arranged close to the first support rod 25 and connected with the first float ball connecting rod 241 are arranged in the box body 1.
The box body 1 is provided therein with a second support 35 connected to an end of the second float link 341 remote from the second float 342, and a second valve lever 36 disposed close to the second support 35 and connected to the second float link 341.
Further, the oil supply valve further comprises a first needle lift valve 27 which is arranged on the oil supply valve body 21 and connected with the first valve rod 26, and a second needle lift valve 37 which is arranged on the oil discharge valve body 31 and connected with the second valve rod 36. The first needle lift valve 27 and the second needle lift valve 37 may adjust the valve stem and thus the float ball assembly.
Further, the oil level indicator 8 is arranged on the tank body 1 and used for measuring and displaying the oil level inside the tank body 1.
Furthermore, the upper side of the box body 1 is also provided with a pipeline communicated with a generator (to the generator side), a related interface and an isolation valve, the pipeline is marked as an A port in the attached drawing 2, the lower side of the box body 1 is provided with a pipeline communicated with a hydrogen side pump, a related interface and an isolation valve, and the pipeline is marked as a B port in the attached drawing 2.
In this embodiment, a verification method for the above hydrogen-side controlled fuel tank offline verification apparatus is also disclosed, which includes the following steps:
s1: the oil replenishing valve body 21 is closed, and the oil discharging valve body 31 is kept in a free state; in step S1, the case 1 is configured to be independent by closing the ports a and B.
S2: slowly filling lubricating oil from the oil supply branch pipe 5, observing the liquid level rising condition from the oil level indicator 8, closing the second control valve 33 when observing that the oil discharge valve body 31 begins to leak oil, and recording the first liquid level H at the moment; continuing to charge the tank body 1 with oil to a level above a second liquid level (H +20 mm), closing the third control valve 51, opening the fourth control valve 61, and continuing to charge the tank body 1 with air to a preset pressure through the air charging branch pipe 6;
in this step, since the amount of the lubricating oil needs to be controlled, the lubricating oil needs to be slowly poured in, and the oil delivery rate and the flow rate of the external oil delivery equipment can be controlled, or fine control can be performed through the third control valve 51, and the third control valve 51 can be connected to an upper computer and controlled by the upper computer. It can be understood that the first liquid level H and the second liquid level can be set and adjusted according to actual requirements.
The gas charging branch pipe 6 is connected to an external gas transmission device, such as a gas storage tank, and when the oil level inside the tank 1 reaches a second liquid level, that is, the first liquid level H is higher than 20mm, the third control valve 51 is closed, that is, no lubricating oil is injected into the tank 1, the fourth control valve 61 is opened, the gas charging operation is performed, the gas is charged to a predetermined pressure gradually, further, the predetermined pressure is 5.2bar, of course, the predetermined pressure or a plurality of pressure ranges can be set according to actual conditions, and the pressure detection is performed through the pressure detection meter 7.
S3: slightly opening the second control valve 33, observing the oil leakage condition at the outlet of the oil drain valve body 31, and when the outlet of the oil drain valve body 31 stops leaking, indicating that the oil drain valve body 31 is closed, i.e. the opening and closing liquid level H of the oil drain valve body 31 Row board (ii) a Because the oil leakage condition at the outlet of the oil drain valve body 31 needs to be accurately observed, the second control valve 33 needs to be slightly opened by a small action, in some embodiments, a flow sensor can be further arranged at the outlet of the oil drain valve body 31, when lubricating oil leaks, the flow sensor can detect the leakage in time, the flow sensor can be connected to an upper computer, such as a computer, or equipment with computing capability, and the upper computer can acquire relevant data in time. Or a camera device is arranged at the outlet of the oil drain valve body 31 to capture the image when oil leaks, and the image can be traced back to ensure the time when oil leaksThe camera device can be connected with an upper computer, the upper computer can acquire relevant data in time and analyze the data, and the detection of the oil leakage condition can be realized by various technical schemes, can be monitored by human eyes and can also be monitored by equipment in an auxiliary way, so that the detection is not limited in detail.
S4: opening the oil supplementing valve body 21 and confirming that no lubricating oil leaks from the outlet of the oil supplementing valve body 21;
s5: operating the third control valve 51 to slightly open the oil discharge valve 31 for oil discharge, observing the oil leakage condition of the liquid level of the tank 1 and the oil inlet blocking plate 22, and recording the liquid level of the tank 1, which is the opening and closing liquid level H of the oil compensation valve 21, when the oil leakage starts from the outlet of the oil compensation valve 21 Supplement device Specifically, it is the opening (closing) liquid level H of the oil replenishment valve body 21 Supplement device 。
S6: judgment of H Row board And H Supplement device If not, readjusting the first and second floating ball assemblies 24 and 34 according to the adjustment calculation formula, and repeating the steps S1-S5 until H Row board And H Supplement device And the preset standard is met. In this step S6, H is compared Row board 、H Supplement device If the deviation standard of the motion reference deviation is not met, the box body 1 is opened, if the deviation standard of the motion reference deviation is not met, the first end cover 11 and/or the second end cover 12 can be opened, the first floating ball assembly 24 and the second floating ball assembly 34 are readjusted according to the adjustment calculation formula, and the steps are repeated until H Row board And H Supplement device And the preset standard is met.
Further, as shown in fig. 3, the adjustment calculation formula includes:
the first float assembly 24 adjusts the formula:
the angle calculation formula of the adjusted first float ball connecting rod 241 is as follows: cos (β 1) = cos (β 0) - γ 1 /L1；
First valve stem 26 is substantially adjusted by an amount δ 1 ＝-L2/L1×γ 1 ；
Wherein, γ 1 The amount of adjustment required for the liquid level, the liquid level up-regulation, gamma 1 Is a positive value; otherwise, the liquid level is lowered, γ 1 Is a negative value; delta 1 Negative, down-regulation, δ 1 If the value is positive, the value is adjusted upwards; beta 0 is the first floatA preset angle between the ball connecting rod 241 and the first support rod 25, β 1 is an adjustment angle between the first float connecting rod 241 and the first support rod 25, L1 is a length from a connection point of the first float connecting rod 241 and the first float 242 to a connection point with the first support rod 25, and L2 is a length from a connection point of the first float connecting rod 241 and the first support rod 25 to a connection point with the first valve rod 26;
the second float ball assembly 34 adjusts the formula:
the angle calculation formula of the adjusted second float link 341: cos (α 1) = cos (α 0) - γ 2 /L3+L4；
Second valve stem 36 substantially adjusts amount δ 2 ＝L3/(L3+L4)×γ 2 ；
Wherein, γ 2 The amount of adjustment required for the liquid level, the liquid level up-regulation,. Gamma 2 Is a positive value; otherwise, the liquid level is lowered, γ 2 Is a negative value; delta 2 Negative, down-regulation, δ 2 If the value is positive, the value is adjusted upwards; α 0 is a preset angle between the second float link 341 and the first strut 25, α 1 In order to adjust the angle between the second float link 341 and the second rod 35, L3 is the length from the connection point of the second float link 341 and the second rod 35 to the connection point of the second valve rod 36, and L4 is the length from the connection point of the second float link 341 and the second float 342 to the connection point of the second valve rod 36.
The adjustment calculation formula can be solidified into an Excel table so as to be convenient for field use, or can be written into a related program to be executed and calculated by an upper computer. The upper computer can be a computer and the like, and comprises an input module, such as a display touch screen or a keyboard and a mouse, for technicians to input the measurement parameters, and a storage module for storing relevant measurement parameters and calculation results. After the function of the hydrogen side control oil tank is verified to be correct, the hydrogen side control oil tank can be installed in a unit system again after being checked to be correct.
Compared with the related technical scheme, the off-line verification device and the verification method for the hydrogen side control oil tank can effectively avoid a key path window for overhaul, ensure that the oil level of the hydrogen side of the sealing oil system is in a qualified level in the ascending stage or the running period of the unit, and greatly improve the overhaul quality and the economy and safety in the overhaul period; the switch liquid level of the floating ball assembly in the oil tank can be accurately positioned through an adjustment test, the liquid level control accuracy can reach a millimeter level, various fault points of equipment are accurately locked and eliminated, and the safe and stable operation of the unit is guaranteed; the major risk that the generator rotor oil inlet and the liquid level are low in hydrogen side sealing oil pump jump during airtight caused by the abnormal oil tank in the prior art is effectively eliminated.
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 (1)

1. The verification method is characterized by being applied to the hydrogen side control oil tank offline verification device, the hydrogen side control oil tank offline verification device comprises a cylindrical box body (1), a first floating ball assembly (24) is arranged in the box body (1), and the first floating ball assembly (24) comprises a first floating ball connecting rod (241) and a first floating ball (242) connected with the first floating ball connecting rod (241);
a second floating ball assembly (34) is arranged in the box body (1), and the second floating ball assembly (34) comprises a second floating ball connecting rod (341) and a second floating ball (342) connected with the second floating ball connecting rod (341); the first floating ball (242) and the second floating ball (342) extend along opposite directions;
a first supporting rod (25) connected with one end, far away from the first floating ball (242), of the first floating ball connecting rod (241) and a first valve rod (26) which is arranged close to the first supporting rod (25) and connected with the first floating ball connecting rod (241) are arranged inside the box body (1);
a second support rod (35) connected with one end, far away from the second floating ball (342), of the second floating ball connecting rod (341) and a second valve rod (36) which is arranged close to the second support rod (35) and connected with the second floating ball connecting rod (341) are arranged in the box body (1);
an oil supplementing valve component (2) used for controlling oil to enter an inner cavity of the box body (1) and an oil discharging valve component (3) used for controlling oil to be discharged out of the box body (1) are arranged on the lower side of the box body (1);
the oil supplementing valve assembly (2) comprises an oil supplementing valve body (21), an oil inlet blocking plate (22) is arranged on the oil supplementing valve body (21), and the oil inlet blocking plate (22) is connected with a first control valve (23);
the oil discharge valve assembly (3) comprises an oil discharge valve body (31), an oil discharge blocking plate (32) is arranged on the oil discharge valve body (31), and the oil discharge blocking plate (32) is connected with a second control valve (33);
a main pipe (4), an oil supplementing branch pipe (5) and an air charging branch pipe (6) which are respectively connected with the main pipe (4) are arranged on the upper side of the box body (1); an exhaust port is formed in the tail end of the main pipe (4), and a fifth control valve (41) is arranged at the exhaust port; the oil supplementing branch pipe (5) is provided with a third control valve (51); a fourth control valve (61) is arranged on the inflation branch pipe (6); the main pipe (4) is also provided with a pressure detection meter (7) for detecting the internal pressure of the box body (1);
the hydrogen side control oil tank off-line verification device further comprises a first needle ejecting valve (27) which is arranged on the oil supplementing valve body (21) and connected with the first valve rod (26), a second needle ejecting valve (37) which is arranged on the oil discharging valve body (31) and connected with the second valve rod (36), and an oil level indicator (8) which is arranged on the box body (1) and used for measuring and displaying the oil level in the box body (1);
the verification method comprises the following steps:
s1: the oil supplementing valve body (21) is closed, and the oil discharging valve body (31) keeps a free state;
s2: lubricating oil is slowly poured into the oil supplementing branch pipe (5), the liquid level rising condition is observed from the oil level indicator (8), when the oil leakage of the oil discharging valve body (31) is observed, the second control valve (33) is closed, and the first liquid level H at the moment is recorded; continuing to fill the tank with oil to a second liquid level or above, closing the third control valve (51), opening the fourth control valve (61), and continuing to inflate the tank (1) to a preset pressure through the inflation branch pipe (6);
s3: slightly opening the second control valve (33), observing the oil leakage condition of the outlet of the oil drain valve body (31), and when the outlet of the oil drain valve body (31) stops leaking, indicating that the oil drain valve body (31) is closed, namely the opening and closing liquid level H of the oil drain valve body (31) Row board ；
S4: opening the oil replenishing valve body (21) and confirming that the outlet of the oil replenishing valve body is not leaked;
s5: operating the third control valve (51), slightly opening the oil discharge valve body (31) for oil discharge, observing the liquid level of the box body (1) and the oil leakage condition of the oil inlet blocking plate (22), recording the liquid level of the box body (1) when the oil leakage of the outlet of the oil supplementing valve body (21) begins, namely the opening and closing liquid level H of the oil supplementing valve body (21) Supplement device ；
S6: judging the H Row board And H Supplement device Whether the first floating ball assembly (24) and the second floating ball assembly (34) meet the preset standard or not, if not, readjusting the first floating ball assembly (24) and the second floating ball assembly (34) according to an adjustment calculation formula, and repeating the steps S1-S5 until the step H is finished Row board And said H Supplement device The method meets the preset standard;
the adjustment calculation formula includes:
the first float assembly (24) adjusts the formula:
the formula for calculating the angle of the adjusted first floating ball connecting rod (241): cos (β 1) = cos (β 0) - γ 1 /L1；
The first valve rod (26) adjusts the quantity delta 1 ＝-L2/L1×γ 1 ；
Wherein, γ 1 The amount of adjustment required for the liquid level, the liquid level up-regulation, gamma 1 Is a positive value; otherwise, the liquid level is lowered, γ 1 Is a negative value; delta 1 Negative, down-regulation, δ 1 If the value is positive, the value is adjusted upwards; beta 0 is a preset angle between the first float connecting rod (241) and the first support rod (25), beta 1 is an adjusting angle between the first float connecting rod (241) and the first support rod (25), and L1 is a connecting point between the first float connecting rod (241) and the first float ball (242) and a connecting point with the first support rod (25)L2 is the length from the connection point of the first float link (241) and the first branch (25) to the connection point of the first stem (26);
the second float ball assembly (34) adjusts the formula:
the angle calculation formula of the adjusted second floating ball connecting rod (341): cos (α 1) = cos (α 0) - γ 2 /(L3+L4)；
The second valve rod (36) adjusts the quantity delta 2 ＝L3/(L3+L4)×γ 2 ；
Wherein, γ 2 The amount of adjustment required for the liquid level, the liquid level up-regulation, gamma 2 Is a positive value; otherwise, the liquid level is lowered, γ 2 Is a negative value; delta 2 Negative, down-regulation, δ 2 If the value is positive, the voltage is adjusted upwards; alpha 0 is a preset angle between the second floating ball connecting rod (341) and the first supporting rod (25), alpha 1 The adjustment angle between the second float link (341) and the second support rod (35), L3 the length from the connection point of the second float link (341) and the second support rod (35) to the connection point of the second float link (36), and L4 the length from the connection point of the second float link (341) and the second float (342) to the connection point of the second float link (36).
CN202010117387.4A 2020-02-25 2020-02-25 Offline verification device and method for hydrogen side control oil tank Active CN111322123B (en)

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