CN1664498A - Liquid-in metrological verification method for vertical metallic tank with an outer floating roof - Google Patents
Liquid-in metrological verification method for vertical metallic tank with an outer floating roof Download PDFInfo
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- CN1664498A CN1664498A CN 200510046109 CN200510046109A CN1664498A CN 1664498 A CN1664498 A CN 1664498A CN 200510046109 CN200510046109 CN 200510046109 CN 200510046109 A CN200510046109 A CN 200510046109A CN 1664498 A CN1664498 A CN 1664498A
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Abstract
The invention discloses a method for certifying the out floating upright canister with liquid, which divides the volume of the canister into several parts and certifies individually, get the corrected value's algebraic sum. The measuring comprises outer measuring, inner measuring when the out floating roof fall on the bottom completely, inner measuring when the out floating roof floats completely, reference height measuring, the total height of the tank, the accessories in the tank. The diameter of the girth sheets can be measured through circumference by perisphere ruler or through the radial missing of the girth sheets relative to the base circle based on the measured diameter of the base circle. The measuring of tank bottom is through pulling supporting leg out and setting target on the floating roof. The measuring of reference height can use annular tube ruler with clean function.
Description
One, technical field
The present invention relates to large tank capacity calibration method, the calibration method of particularly externally floating top vertical metal tankage size.
Two, background technology
The outer floating roof metal can is a kind of in the vertical metal tank, and it is widely used in the oil storage and transportation of petroleum refining, chemical enterprise and port and pier.The outer floating roof metal can belongs to large-scale test tank.Usually according to the requirement of national metrological verification regulations JJG168-87, the calibration interval of vertical metal tank are no more than 4 years.Behind newly-built jar or overhaul jar initial survey, arrive reinspection during the cycle, just must recheck jar.For the calibrating at the bottom of the outer floating roof metal can tank, all be with under the prerequisite that pot liquid empties fully, the tank body manhole is opened at present, personnel enter and utilize measuring instrument equipment to examine and determine in the tank.Because the outer floating roof metal can belongs to large-scale measuring tank, clear up a tank enterprise and need to spend hundreds of thousands first fund and the time of first quarter moon even one or two months to units up to a million, to such an extent as to affect the production of enterprise.Therefore, enterprise is to very high, very urgent with the cry of liquid calibrating outer floating roof metal can.
Three, summary of the invention
The purpose of this invention is to provide a kind of outer floating roof metal can band liquid-in metrological verification method, reduce the calibrating cost, for enterprise saves fund and time, guarantee ordinary production.
Outer floating roof metal can band liquid-in metrological verification method comprises that technical conditions are prepared, environmental baseline is monitored, equipment is checked oneself self-correcting, examines and determine measuring method and data handling procedure.Its calibrating measuring principle is: the tank body of vertical metal tank is a cylinder under perfect condition, usually tank body forms with steel plate welding (riveted joint), with the weld seam is that the boundary can be divided into several layers, be called first girth sheets from bottom to up successively, second girth sheets ... the n girth sheets, if consider the modified value of the tank skin elastic deformation that a jar end unevenness, jar interior annex volume, hydrostatic pressure cause, and the tilt correction of tank body etc., then each girth sheets capacity Vi is:
In the formula: d
i---the interior diameter (mm) of i girth sheets;
h
i---the interior height (mm) of i girth sheets;
I=1,2,3 ... n---be the sequence number of girth sheets;
Δ V
Quiet---the hydrostatic pressure modified value;
Δ V
Attached---the volume of annex in jar, when its volume increases the useful capacity of jar, Δ V
AttachedFor on the occasion of; Otherwise, be negative value;
Δ V
The end---the modified value of jar end unevenness;
Δ V
Tiltedly---jar modified value that tilts.
The total capacity V of tank is:
By measuring principle as can be known, we need measure every girth sheets diameter, plate hight, thickness of slab, the absolute altitude at jar end and measuring position thereof, stoichiometric point absolute altitude down, and the physical dimension and the start-stop position of annex in jar, and tank body degree of tilt and ovality measured.
In the measurement of girth sheets diameter, have plenty of by peripheral (or interior shop) chi and measure the rear acquisition of circumference calculating, the base circle diameter (BCD) after having plenty of to measure is benchmark, calculates acquisition by measuring each girth sheets with respect to the radial missing of basic circle again.
The measurement of outer floating roof metal can band liquid-in metrological verification method be divided into externally measured, the outer floating roof of tank body land fully measure in the tank at the bottom of the tank time, measure in the tank after the complete floating of outer floating roof during low level, with reference to annex measurement in highly measurement, the total high measurement of tank body, the tank.
(1) tank body is externally measured:
When tank body was not incubated, the circumference of basic circle, the plate hight of each girth sheets, thickness of slab, radial difference all can be externally measured at tank body according to vertification regulation.
When tank body is incubated, land after at the bottom of the jar fully in floating outward top, can measure the circumference of basic circle girth sheets above the floating top and the radial difference of other girth sheets in jar.And in tank, can't measure the parameter such as diameter, plate hight, thickness of slab of each girth sheets below the floating roof; Plate hight and thickness of slab can be continued to use cycle data or consult drawing and obtain.For the girth sheets diameter, adopt that tank body is externally measured to be finished this moment.Measurement can be in two kinds of situation, one, the top of one girth sheets and jar junction, the end has one section girth sheets not to be incubated and exposes, and measures the tank body circumference if exposed parts can enclose chi, then encloses the basic circle of circumference of chi measurement as outer survey one girth sheets and other girth sheets radial differences with this.According to counting that vertification regulation requires, 1/4 and 3/4 plate hight place of 1/4 plate hight place of first girth sheets, other girth sheets is to the heat-insulation layer hand drill outside tank in advance, and the vertical that requires respectively to hole is corresponding so that measure with plumb aligner.Take basic circle as benchmark, the probe scale is inserted respectively in advance drill hole, measure the radial missing value of each girth sheets with plumb aligner.After measurement is finished, with riveting apparatus with the hole riveted.
Its two, the outside all insulations of tank body.At this moment basic circle in the jar as jar external pelivimetry basic circle.Measuring method is to utilize target that basic circle position in the tank is returned to measure the outer correspondence position of tank and get out measured hole at heat-insulation layer by hand, and with the benchmark of the girth sheets outside corresponding to this hole as other girth sheets radial differences on this place, hole plumb line of measurement.The radial difference that utilization records is considered the thickness of slab of each girth sheets, the internal diameter that the basic circle girth just can calculate each girth sheets again.According to counting that vertification regulation requires, on heat-insulation layer, get out the measured hole of datum hole and the corresponding datum hole of other girth sheets 1/4,3/4 plate hight place plummet along circumference, a girth sheets is only holed at 3/4 plate hight place.The probe scale is inserted respectively in advance drill hole, measure the radial missing value of each girth sheets with plumb aligner.After measurement is finished, with riveting apparatus with the hole riveted.
Tank bottom side portion level measurement: arrange some measuring points around a girth sheets even circumferential in the tank body outside, utilize spirit level and elevation ruler, set up a plurality of related survey stations all measuring points are carried out level measurement, at last the absolute altitude of all measuring points is converted to the absolute altitude on the corresponding level of first survey station, on the measurement horizontal plane the when measurement of correlation that utilizes upper and lower target is converted to level measurement at the bottom of the tank inner canister with limit standard laid down by the ministries or commissions of the Central Government height.
(2) outer floating roof is landed measure in the tank at the bottom of the tank time fully:
Base circle measurement: floating roof is landed after at the bottom of the tank, is at least half girth sheets of plate hight as basic circle place girth sheets to expose the rainproof sealing backplate of floating roof, take 1/4 or 3/4 plate hight place of girth sheets as the basic circle position, measures circumference with interior shop chi method.
Each girth sheets radial difference is measured: on the tank inner floating roof, utilize the optical optical plummet and portable radial missing instrument to measure the radial missing of each girth sheets.
The level measurement of floating roof starting point:
The floating top of single-deck formula: spirit-leveling instrument is installed in floating top goes up metastable position, with about 8 five equilibriums of single-deck radius, and fixed numbers, be connected the edge of angle bar on single-deck with cabin with the single-deck that aligns the zero point of ullage rule, to radial direction is basis 8 marks that draw with the fixed numbers, 8 above methods of direction in symmetry on the single-deck make marks on single-deck, scale are vertically stood on mark one by one, with the spirit-leveling instrument reading of data and carry out record.Supersonic thickness meter is installed, measure single-deck thickness, repeatedly measure and get its mean value and carry out record.
The two-layer equation floating roof: spirit level is installed in metastable position on the floating roof, the hatch of each cabin on the floating plate is all opened, scale vertically stands on by hatch on the iron plate of cabin bottom, with the spirit level reading out data and make a record.Install sonigauge, enter in the cabin, measure the thickness of bottom steel plate, measure the thickness of minimum 4 cabins bottom steel plate, average and make a record.
Subscript target high measurement: on the tank skin above the floating roof corresponding with tank deck metering dipping platform, will be adsorbed on the support of strong magnetic seat on the tank skin, lower target is rack-mount; Target is set and requires upper and lower target mutually corresponding on vertical at metering dipping platform simultaneously.Usually we are used as lower target with the plane of plumb aligner base, it is installed on this goes up and utilize and himself be with horizontal bubble with its leveling.With the level of the level meter in the level measurement of floating roof starting point, measure the absolute altitude of lower target.
Last target, upward dipping point level measurement: with a surveyor's staff is handle, a surface plate is fixed in one of surveyor's staff brings in as last target.Surface plate also is in level when requiring horizon rule to be in level.On tank deck metering dipping platform, with adjustable high tripod will go up that target places and following target on the position of mutual correspondence on the vertical and with its leveling, its place level will be higher than dipping point place level.Level meter is erected between above-mentioned two levels and leveling, utilizes elevation ruler to measure respectively the absolute altitude of the absolute altitude of target (lower surface fall chi) and upper dipping point.
Upper and lower target vertical survey: the measuring basis of laser range finder is set to the bonnet trailing edge.Laser range finder is placed on the plane of modulated flat lower target, find range zero point this moment just in time on the plane of lower target.Press the stadia surveying key and adjust laser facula and beat on upper target, again press and measure key and measure distance between upper and lower target.Repeat above-mentioned measurement, with the mean value of twice measured value as the upper and lower target discrepancy in elevation.
Plate hight, thickness of slab are measured: near the tank skin place the floating roof helper, oil dipstick is put down along tank skin from tank deck, and with magnet oil dipstick chi band is fixed on the tank skin of the highest girth sheets, keep chi band freedom sagging.The tank skin place is fixed the chi band with magnet above floating top equally.Read the middle oil dipstick reading of the bottom one girth sheets side seam in floating roof top.Along the floating roof helper, utilize from lower to upper right oil dipstick reading in the middle of the monitoring neighbouring girth sheets side seam successively of spirit level, read at last the reading on edge on the highest girth sheets, and make a record.Two girth sheets plate hights can subtract other girth sheets plate hights with height overall and obtain.
After the sonigauge installation and debugging are complete, coat couplant in the measured place, will pop one's head in and tested girth sheets coupling, screen namely shows measured material one-tenth-value thickness 1/10 and coupling sign.After taking away probe, one-tenth-value thickness 1/10 keeps, the coupling marks obliterated, and institute's Thickness Measurement by Microwave value is girth sheets thickness.As the sign flicker or do not have the coupling sign of being coupled, and the data variation of surveying, illustrate that coupling is bad, need smear couplant again, remeasure.Such as material real velocity of sound and 5900m/s not simultaneously, should not record real velocity of sound and be calculated as follows the actual (real) thickness value:
H0＝H×V0/5900
In the formula: H---measured value under the 5900m/s velocity of sound (mm);
V0---material real velocity of sound value (m/s);
H0---material actual (real) thickness value (mm);
The measuring position is at 1/4 or 3/4 place of each girth sheets.
Ellipticity measurement: according to the circumference of basic circle girth sheets measurement, eight symmetric orientation to jar are marked on tank skin, in level measurement at the bottom of the jar, center with horizontal horizontal position welding seam between one, two girth sheets of aiming at underlined place the zero point of 3m box chi, the chi band is freely dangled, with spirit-leveling instrument reading of data one by one, and carry out record.At last the absolute altitude of all measuring points is converted to the absolute altitude on the corresponding level of first survey station.
(3) measure in the tank during low level after the complete floating of outer floating roof:
Level measurement at the bottom of the tank (pulling out the floating roof supporting leg): measuring principle: after the complete floating of floating roof, the spirit level frame is stablized place and leveling in floating roof.Extract every floating top supporting leg respectively out and measure the absolute altitude of floating top supporting leg backing plate by the absolute altitude chi.Absolute altitude at the bottom of the thickness that this absolute altitude adds the supporting leg backing plate is jar.Each supporting leg distributes on floating roof ringwise, measures the radius or the diameter that respectively enclose the supporting leg place.
When the complete floating of floating roof surpasses floating stop 200～300mm, stop to receive and dispatch operation and leave standstill more than 1 hour, guarantee that floating roof is in stable state.Be installed on the metastable position, floating roof middle part spirit level and leveling.Will be with the tripod support of gin wheel above the floating roof supporting leg that will be pulled out, hoisting line is hung on the hoisting ring of supporting leg, the other end of rope unloads floating roof supporting leg pin with the copper instrument simultaneously by artificial pulling, manually drags then rope and slowly supporting leg is extracted.Be trapped among simultaneously the upper edge of supporting leg sleeve with rag, prevent that supporting leg from taking the collisions that a lot of oil also reduces supporting leg and sleeve simultaneously out of.The bushing type elevation ruler is linked to be 5 meters long, vertically inserts through support leg liner plate at the bottom of the tank by the supporting leg sleeve pipe, the revoling tube elevation ruler is removed the backing plate deposit, confirm cleaning finish after vertical straight elevation ruler read absolute altitude with spirit level.Pull out outside in the process of absolute altitude chi and be trapped among on the absolute altitude chi, promptly the absolute altitude chi is finished wiping and prevent to take out of oil again and come with rag.At last supporting leg is sent back to former bit recovery original appearance, and the accessory that damages in the dismounting is upgraded.
Measure radius or the diameter that respectively encircles the supporting leg place and make a record with steel tape or laser range finder.
Dead amount datum mark is measured: continue to utilize spirit level when measuring at the bottom of the tank (keep former measurement level constant) to measure this.Near the breather valve place of an appointment of tank skin, breather valve is extracted on floating roof, the barrel that is used for supporting breather valve at pontoon is made at present footage number note of dipping, at the vertical straight elevation ruler of this mark and at the bottom of guaranteeing that the chi head arrives at tank, reads absolute altitude with spirit level.Dead amount datum mark at the bottom of this absolute altitude is jar.
The level measurement of lower gauge point (target, upper gauge point absolute altitude etc.): the absolute altitude of lower gauge point can by finally derive with reference to height, upper gauge point absolute altitude, upper and lower target absolute altitude lower gauge point with respect to tank at the bottom of absolute altitude under the level measurement level.
The measurement of pontoon fluctuation height and quality: the requirement by rules is measured.
(4) with reference to highly measuring:
With reference to highly measuring: with reference to the vertical range that highly is meant between gauge point and the following gauge point.At first steel wire rope in the sleeve pipe chi pipe and sleeve pipe chi head are connected firmly, the sleeve pipe chi are connected closely by joint also put down along dipping tube gradually then.Behind the lower metering plate of sleeve pipe chi head contact, guarantee that the sleeve pipe chi exceeds about upper stoichiometric point 1m.Be clamped on the middle part of sleeve pipe chi exposed parts with spanner, and make it to rotate in the direction of the clock so that sleeve pipe chi head can be cleared up the deposit at lower metering plate place.After the metering plate deposit is cleared up under confirming (elevation ruler no longer includes and moves down), vertical straight connector chi reads elevation ruler scale corresponding to gauge point, is survey with reference to height.Repeat above-mentioned measurement more than twice, average as jar with reference to height and carry out record.Elevation ruler is unloaded by saving to extract, check that elevation ruler has or not distortion; If any distortion, then should change elevation ruler and remeasure.
(5) the total high measurement of tank body:
The total high measurement of tank body: utilize tank bottom side portion absolute altitude under the same level and lower gauge point absolute altitude, with reference to indirectly measuring the tank body total height along absolute altitude and upper gauge point absolute altitude on the tank body under height, the same level.With the also leveling on last dipping platform of spirit-leveling instrument support.Stand in the upper edge and the dipping hole upper edge of the last layer girth sheets of tank body respectively with the absolute altitude chi, read absolute altitude respectively and carry out record.
(6) annex is measured in the tank:
Annex is measured or is consulted in the tank: for rechecking tank, the initial data the when data of annex can be examined and determine with reference to upper one-period in the tank.Supreme periodic calibration data also can be by inquiry tank delivery receiving acceptance drawing and related data, shape, geometric parameter and the terminal data of each annex (manhole, poke hole, heater, turnover oil pipe, floating roof support leg liner plate thickness etc.) in the record tank.
Band liquid is examined and determine this method and was not only saved a large amount of clear tank funds but also saved the clear tank time for enterprise, examines and determine cost, brings very big benefit for enterprise thereby greatly reduce enterprise.
Four, embodiment
Outer floating roof metal can band liquid-in metrological verification method comprises that technical conditions are prepared, environmental baseline is monitored, equipment is checked oneself steps such as self-correcting, calibration method, data handling procedure and uncertainty evaluation.The concrete measurement of calibrating according to the method for operating of requirement among tank body type and the JJG168-87 " vertical metal tankage size " and actual measurement tank body measurements can be divided into externally measured, outward floating top land fully measure in the jar at the bottom of the jar time, annex is measured six parts in the measurement in the jar after the complete floating in outer floating top during low level, highly measurement of reference, the total high measurement of tank body, jar.
1, externally measured:
1.1 when tank body was not incubated, the circumference of basic circle, the plate hight of each girth sheets, thickness of slab, radial difference all can be externally measured at tank body according to JJG168-87 " vertical metal tankage size " vertification regulation.
1.2 when tank body is incubated, land after at the bottom of the jar fully in floating outward top, can measure the circumference of basic circle girth sheets above the floating top and the radial difference of other girth sheets in jar.And in tank, can't measure the parameter such as diameter, plate hight, thickness of slab of each girth sheets below the floating roof; Plate hight and thickness of slab can be continued to use cycle data or consult drawing and obtain.For the girth sheets diameter, adopt that tank body is externally measured to be finished this moment.Measurement can be in two kinds of situation, one, and the top of junction has one section girth sheets not to be incubated and exposes at the bottom of a girth sheets and the tank, measures the tank body circumference if exposed parts can enclose chi, and this moment is with the basic circle of this circumference as outer survey one girth sheets and other girth sheets radial differences.The base circle measurement position can be selected in the not middle part of insulating sections of a girth sheets.Aiming at a jar end at zero point of straight steel ruler, enclosing the chi circumferential location, draw a horizontal horizontal line along circumference every 1 ~ 3m, around one week of tank skin with the chalk long horizontal horizontal line of 5cm that draws with level altitude.Be fixed on the tank skin with the end of magnet with steel tape, by counterclockwise putting chi, chi roughly be centered around measure near the circumference, and will be close to tank skin, fix about 5 minutes with magnet, make ruler and tank skin will fully reach the Dynamic Thermal balance.On the horizontal horizontal line of measuring circumference, apart from the position outside cross joint and other barrier 300mm, draw a thin vertical line, become right-angled intersection with horizontal horizontal line.The zero graduation line of steel tape is overlapped with vertical line, and the top edge of chi band aligns with the lower edge of horizontal horizontal line.At the left side of zero graduation line fixed ruler band, about the about 3m of distance magnet, the chi chuck on the chi band, is connected tensiometer at its collar with magnet, the upper limb of chi band is overlapped with the lower edge of horizontal horizontal line.Tangential direction tension ruler at tank skin, and the reading that makes tensiometer reaches 98N or 10kg, observe chi band zero point and starting point vertical line whether relative displacement takes place, there is displacement explanation magnetic force inadequate, needing to increase magnet quantity remeasures, non-displacement explanation starting point is accurate, and the place, point of contact at chi band and tank skin is fixed on the chi band on the tank skin with magnet.By counterclockwise, use method fixed ruler band successively along measuring circular path.Note, except enclose the chi starting point all the time fixing, when giving any point afterburning, its first two point of contact all must be fixing, it is simultaneously fixing namely will to ensure two point of contacts in measuring process, in case the landing of chi band.When the method for using is fixed to starting point with the chi band, check whether chi band zero graduation line and starting point vertical line have displacement, such as non-displacement, illustrate that Measurement situation is intact, starting point magnet is moved to right, stop chi band is afterburning to be examined pulling force identical with the chi band.The fixing not-go-end chi band on the right side of vertical line, the reading that reads the corresponding steel tape of starting point vertical line is to mm value, record data.The duplicate measurements circumference, two differences of taking second place should write down measurement data twice greater than franchise shown in the following table;
Circumference (C) is measured franchise
| C≤100m | 3mm |
| 100m＜C≤200m | 4mm |
| C＞200m | 6mm |
During actual measurement, tape measure will be crossed the projection of weld seam, rivet and stiffening plate, brings certain systematic error for the circumferential measurements of measuring circumference, and this is needed to carry out the measurement of modified value with the leap device.With the fixed any chord length of aerial spanning device, measure this string with steel tape and be close to accessible arc length corresponding to tank skin.Measure twice at diverse location, get its mean value.Measure corresponding arc length when crossing over device and crossing protrusion with steel tape again.Measure twice at diverse location, get its mean value.The sum that multiply by this protrusion with the difference of two averages namely gets the correction value of the girth that this protrusion causes.
Measure for each girth sheets radial difference, according to counting that vertification regulation requires, 1/4 and 3/4 plate hight place of 1/4 plate hight place of first girth sheets, other girth sheets is to the heat-insulation layer hand drill outside tank in advance, and the vertical that requires respectively to hole is corresponding so that measure with plumb aligner.Measure circumference as benchmark take a girth sheets, the probe scale is inserted respectively in advance drill hole, measure the radial missing value of each girth sheets with plumb aligner.After measurement is finished, with riveting apparatus with empty riveted.
Its two, the outside all insulations of tank body.At this moment basic circle in the jar as jar external pelivimetry basic circle.Measuring method is to utilize target that basic circle position in the tank is returned to measure the outer correspondence position of tank and get out measured hole at heat-insulation layer by hand, and with the benchmark of the girth sheets outside corresponding to this hole as other girth sheets radial differences on this place, hole plumb line of measurement.The radial difference that utilization records is considered the thickness of slab of each girth sheets, the internal diameter that the basic circle girth just can calculate each girth sheets again.According to counting that vertification regulation requires, on heat-insulation layer, get out the measured hole of datum hole and the corresponding datum hole of other girth sheets 1/4,3/4 plate hight place plummet along circumference, a girth sheets is only holed at 3/4 plate hight place.The probe scale is inserted respectively in advance drill hole, measure the radial missing value of each girth sheets with plumb aligner.After measurement is finished, with riveting apparatus with empty riveted.
After in tank, having surveyed each girth sheets radial difference, set up respectively lower target to set up with it corresponding upper target at tank deck simultaneously in each survey station position, with it corresponding upper and lower target also is set outside tank.The equal furnishing horizontality of the upper and lower target that jar is inside and outside.In tank, spirit level is erected at stable place and leveling, utilizes elevation ruler to measure the absolute altitude of lower target and basic circle position; Measure the discrepancy in elevation between upper and lower target with laser range finder; At tank deck spirit level is erected at stable place and leveling, utilizes elevation ruler to measure the absolute altitude of two upper targets.Outside jar, spirit-leveling instrument is erected at stable place and leveling, utilizes the absolute altitude chi to measure down the absolute altitude of target; Measure the discrepancy in elevation between upper and lower target with laser range finder; Above measurement data is carried out record.Utilize the plate hight of above-mentioned measurement data and girth sheets to be measured just can calculate the discrepancy in elevation that the outside lower target of tank and datum hole and each girth sheets are treated gaging hole, according to calculate the discrepancy in elevation with oil dipstick in position that the tank skin heat-insulation layer marks each hole also by hand mode get out measured hole.The probe scale is inserted the datum hole place, require the pin mark chi to be in level and sensing tank body axis.Optical plumbing instrument support is installed under scale, with plane carriage Anping as far as possible, then the optical plumbing instrument is placed on the carriage of plane fixing tight with screw, three footing knobs adjusting the optical plumbing instrument make horizontal bubble placed in the middle, loosen the center bolt of retainer instrument, move horizontally instrument, make the scale should be, the dead center screw at center, the visual field, rotation fine motion button, make slowly sense of rotation of instrument, and make the cross curve horizontal line should with the scale label line parallel, screw the fine motion fixing button it fixed, the rotation focusing knob, the scale label line clearly is presented in the eyepiece, reads cross curve horizontal line and scale value corresponding, and keep a record.The fine motion scale sets back it and puts, reading once more, and two take second place difference should be greater than 1mm, otherwise should resurvey.The measured hole of each girth sheets in order on method measure one by one, record the radial missing numerical value of each measuring point.
1.3 jar bottom side portion level measurement: jar bottom side portion level measurement: we evenly arrange some (even numbers) measuring point to tank bottom according to the relevant requirements among the JJG168-87 " vertical metal tankage size " around a girth sheets circumference in the tank body outside.At first set up the 1st measuring point at the jar corresponding with tank deck metering dipping platform at the end, other measuring points by counterclockwise successively mark the 2nd, 3 ... the N point.First survey station is located near first measuring point.Utilize spirit level and elevation ruler that each measuring point absolute altitude of tank bottom is measured, the association that next survey station will be set up adjacent survey station to last measuring point measurement of a upper survey station.Record the measurement result of each measuring point, at last the absolute altitude of all measuring points is converted to the absolute altitude on the corresponding level of first survey station.
Near 1.4 subscript target high measurement: at the bottom of the tank corresponding with tank deck metering dipping platform, lower target is set; Target is set and requires upper and lower target mutually corresponding on vertical at metering dipping platform simultaneously.Usually we are used as lower target with the plane of plumb aligner base, are installed on it on tripod and utilize and himself be with horizontal bubble with its leveling.With the level of the first survey station level meter in the level measurement of jar bottom side portion, measure down the absolute altitude of target.
1.5 last target, upward dipping point level measurement: with a surveyor's staff is handle, a surface plate is fixed in one of surveyor's staff brings in as last target.Surface plate also is in level when requiring horizon rule to be in level.On tank deck metering dipping platform, with adjustable high tripod will go up that target places and following target on the position of mutual correspondence on the vertical and with its leveling, its place level will be higher than dipping point place level.Level meter is erected between above-mentioned two levels and leveling, utilizes elevation ruler to measure respectively the absolute altitude of the absolute altitude of target (lower surface fall chi) and upper dipping point.
1.6 upper and lower target vertical survey: the measuring basis of laser range finder is set to the bonnet trailing edge.Laser range finder is placed on the plane of modulated flat lower target, find range zero point this moment just in time on the plane of lower target.Press the stadia surveying key and adjust laser facula and beat on upper target, again press and measure key and measure distance between upper and lower target.Repeat above-mentioned measurement, with the mean value of twice measured value as the upper and lower target discrepancy in elevation.
1.7 the Tank tilting degree is measured: according to the circumference that a girth sheets is measured, eight symmetric orientation of tank are marked at tank skin, in level measurement at the bottom of the tank, with spirit level reading out data one by one, and make a record.At last the absolute altitude of all measuring points is converted to the absolute altitude on the corresponding level of first survey station.
2, the floating outward top measurement in the jar at the bottom of the jar time of landing fully
2.1 the measurement of basic circle circumference: when floating roof is landed after at the bottom of the tank, be at least half girth sheets of plate hight as basic circle place girth sheets to expose the rainproof sealing backplate of floating roof, take 1/4 or 3/4 plate hight place of girth sheets as the basic circle position, measure circumference with interior shop chi method.
Choosing of basic circle circumferential position: choosing of basic circle circumferential position should be according to two principle, and the one, be convenient to operation; The 2nd, can represent the average circumference of place girth sheets.
The horizontal technique of painting: calculate the numerical value of basic circle plate hight 3/4, check that there is clear at basic circle circumference place, determines the position of basic circle circumference in the upper and lower 50mm scope in basic circle plate hight 3/4 place, write down the distance of this position to basic circle girth sheets starting point.With the starting point of aiming at the basic circle girth sheets zero point of 3m box chi, the chi band is pulled to more than definite basic circle circumferential position, at accurately the draw horizontal horizontal line of long 5cm of basic circle circumferential location, every about 2m according to above method drawing water intaking flat horizontal line on the tank skin with chalk.Perhaps after determining the horizontal level of basic circle circumference, with the 600mm Steel Ruler measure the basic circle circumference really allocation record numerical value to the distance between the upper weld seam, and make the horizontal mark of 5cm of chalk.According to above method, horizontal horizontal line draws;
Interior shop chi method is measured the basic circle circumference: the chi band of steel tape decontroled clockwise, and around one week of tank skin, should be roughly near temperature in the tank with the temperature that reaches the chi band.Choose the shop chi and play the vertical vertical line of strokes and dots, should intersect with horizontal horizontal line, with steel measuring tape band aligned perpendicular at zero point vertical line, the upper edge of chi band overlaps with the lower edge of horizontal horizontal line.With the magnet fixed ruler band left side at zero point, clockwise the chi band is completed along the horizontal line direction, compress the chi band with Steel Ruler, whether overlap with vertical vertical line the zero point of observing the chi band, overlaps as determining, compressing successively the chi band with Steel Ruler tightly fits itself and tank skin, spread around the basic circle circumference of determining and to press a week, last chi that closes on vertical vertical line spread press complete after, read the numerical value that the chi band overlaps with vertical vertical line, be taken to 0.5mm, and keep a record.Measure twice, two difference of taking second place in order to last method and must not get its mean value greater than 2mm;
The correction of basic circle circumference: select four accessible arcs at the horizontal horizontal line of basic circle circumference place, with crossing over the length records numerical value that rule block accessible arc, the mean value of getting four arc length is as reference.At the position that steel tape clears the jumps,, keep to cross over rule constant the card with it of chord length and to have the obstacle arc as the arc length center with barrier, the steel tape length that record is corresponding is the leap correction value of relative this barrier of steel tape with the difference of this length of reference;
2.2 radial difference is measured: the choosing of each girth sheets radial missing measuring position: because the influence of pot liquid static pressure and horizontal welding fishplate bar, except that the first girth sheets shape was slightly different, its vertical cross section of the shape of other each girth sheets all slightly was the curved surface of cydariform.Therefore can choose measuring point to the diameter measurement of these girth sheets carries out representative measure, gets the diameter of its mean value as this girth sheets then, generally is chosen at outer high 1/4 and 3/4 position of every girth sheets and equidistant radial missing measurement point.Choosing of its horizontal direction measurement point should be determined by following principle: should be even number, girth is during smaller or equal to 100m, and the arc length of adjacent level survey station is no more than 3m, and minimum measure dot number is no less than 16 points; Girth is during greater than 100m, and the arc length of adjacent level survey station is no more than 4m, and minimum measure dot number is no less than 36 points (for the big jar of distortion, measurement point according to circumstances increases).
Halyard is passed the pulley of pulley assembly, pulley assembly is hooked on the guardrail of tank deck, scale is inserted magnetic climb in the scale slot of car, tighten the screw on both sides, so that scale is fixed.One end of halyard is connected on the annulus of climbing the car front portion, annulus is swung freely, the tension halyard other end, make and climb the car side and freely dangle to tank skin, determine that the position sets upright dolly, make on the dolly three rollers all need be close to tank skin, will climb car and be pulled to the horizontal horizontal line of basic circle place, climb that back two rollers should overlap with the lower edge of horizontal horizontal line with the tangent line of tank skin on the car.Optical plumbing instrument support is installed under scale, with plane carriage Anping as far as possible, then the optical plumbing instrument is placed on the carriage of plane fixing tight with screw, three lower margin knobs adjusting the optical plumbing instrument make horizontal bubble placed in the middle, loosen the center bolt of retainer instrument, move horizontally instrument, make the scale should be, the dead center screw at center, the visual field, rotation fine motion button, make slowly sense of rotation of instrument, and make the cross curve horizontal line should with the scale label line parallel, screw the fine motion fixing button it fixed, the rotation focusing knob, the scale label line clearly is presented in the eyepiece, reads cross curve horizontal line and scale value corresponding, and keep a record.Car is climbed in fine motion, and it is set back put again, reading once more, two take second place difference should be greater than 1mm, otherwise should resurvey.The pulling halyard makes and climbs car and move upward by the vertical line direction, reads the radial missing value of each girth sheets one by one; Each measuring point in order on the method radial missing numerical value of each measuring point of survey record one by one.
2.3 floating roof starting point level measurement:
The floating top of single-deck formula: spirit-leveling instrument is installed in floating top goes up metastable position, with about 8 five equilibriums of single-deck radius, and fixed numbers, be connected the edge of angle bar on single-deck with cabin with the single-deck that aligns the zero point of ullage rule, to radial direction is basis 8 marks that draw with the fixed numbers, 8 above methods of direction in symmetry on the single-deck make marks on single-deck, scale are vertically stood on mark one by one, with the spirit-leveling instrument reading of data and carry out record.Supersonic thickness meter is installed, measure single-deck thickness, repeatedly measure and get its mean value and carry out record.
The two-layer equation floating roof: spirit level is installed in metastable position on the floating roof, the hatch of each cabin on the floating plate is all opened, scale vertically stands on by hatch on the iron plate of cabin bottom, with the spirit level reading out data and make a record.Install sonigauge, enter in the cabin, measure the thickness of bottom steel plate, measure the thickness of minimum 4 cabins bottom steel plate, average and make a record.
2.4 subscript target high measurement: on the tank skin above the floating roof corresponding with tank deck metering dipping platform, will be adsorbed on the support of strong magnetic seat on the tank skin, lower target is rack-mount; Target is set and requires upper and lower target mutually corresponding on vertical at metering dipping platform simultaneously.Usually we are used as lower target with the plane of plumb aligner base, it is installed on this goes up and utilize and himself be with horizontal bubble with its leveling.With the level of the level meter in the level measurement of floating roof starting point, measure the absolute altitude of lower target.
2.5 upper target, upper dipping point level measurement: with 1.6.
2.6 upper and lower target vertical survey: with 1.7.
2.7 the plate hight thickness of slab is measured: near the tank skin place the floating roof helper, oil dipstick is put down along tank skin from tank deck, with magnet oil dipstick chi band is fixed on the tank skin of the highest girth sheets, keep chi band freedom sagging.The tank skin place is fixed the chi band with magnet above floating top equally.Read the middle oil dipstick reading of the bottom one girth sheets side seam in floating roof top.Along the floating roof helper, utilize from lower to upper right oil dipstick reading in the middle of the monitoring neighbouring girth sheets side seam successively of spirit level, read at last the reading on edge on the highest girth sheets, and make a record.Two girth sheets plate hights can subtract other girth sheets plate hights with height overall and obtain.
After the sonigauge installation and debugging are complete, coat couplant in the measured place, will pop one's head in and tested girth sheets coupling, screen namely shows measured material one-tenth-value thickness 1/10 and coupling sign.After taking away probe, one-tenth-value thickness 1/10 keeps, the coupling marks obliterated, and institute's Thickness Measurement by Microwave value is girth sheets thickness.As the sign flicker or do not have the coupling sign of being coupled, and the data variation of surveying, illustrate that coupling is bad, need smear couplant again, remeasure.Such as material real velocity of sound and 5900m/s not simultaneously, should not record real velocity of sound and be calculated as follows the actual (real) thickness value:
H0＝H×V0/5900
In the formula: H---measured value under the 5900m/s velocity of sound (mm);
V0---material real velocity of sound value (m/s);
H0---material actual (real) thickness value (mm);
The measuring position is at 1/4 or 3/4 place of each girth sheets.
2.8 tank body ellipticity measurement: the interior girth according to primitive girth sheets height 3/4 place, its girth is divided into 8 five equilibriums, and marks at tank skin, measure distance between two symmetric points with steel tape.Zero point of steel tape is aimed at a bit, and stretching steel tape on its symmetric points, left and right horizontal Mobile steel tape measure are found out greatest measure and are distance between two symmetric points, measure in accordance with the law, obtain each oval length radius, and make a record.
3, measure in the tank during low level after the complete floating of outer floating roof
3.1 level measurement at the bottom of the tank: measuring principle: after the complete floating of floating roof, the spirit level frame is stablized place and leveling in floating roof.Extract respectively every floating roof supporting leg out and measure the absolute altitude of floating roof support leg liner plate by elevation ruler.Absolute altitude at the bottom of the thickness that this absolute altitude adds the supporting leg backing plate is jar.Each supporting leg distributes on floating roof ringwise, measures the radius or the diameter that respectively enclose the supporting leg place.
When the complete floating of floating roof surpasses floating stop 200～300mm, stop to receive and dispatch operation and leave standstill more than 1 hour, guarantee that floating roof is in stable state.Be installed on the metastable position, floating roof middle part spirit level and leveling.To hoisting line be hung on the hoisting ring of supporting leg with the tripod support of gin wheel above the floating roof supporting leg that will be pulled out, the other end of rope unloads floating roof supporting leg pin with the copper instrument simultaneously by artificial pulling.Manually dragging then rope slowly extracts supporting leg.Be trapped among simultaneously the upper edge of supporting leg sleeve with rag, prevent that supporting leg from taking the collisions that a lot of oil also reduces supporting leg and sleeve simultaneously out of.The bushing type elevation ruler is linked to be 5 meters long, vertically inserts through support leg liner plate at the bottom of the tank by the supporting leg sleeve pipe, the revoling tube elevation ruler is removed the backing plate deposit, confirm cleaning finish after vertical straight elevation ruler read absolute altitude with spirit level.Pull out outside in the process of absolute altitude chi and be trapped among on the absolute altitude chi, promptly the absolute altitude chi is finished wiping and prevent to take out of oil again and come with rag.At last supporting leg is sent back to former bit recovery original appearance.The accessory that damages in the dismounting is upgraded.Measure radius or the diameter that respectively encircles the supporting leg place and make a record with steel tape or laser range finder.
3.2 extremely measuring datum mark measures: continue to utilize spirit-leveling instrument when measuring jar end (keep former measurement level constant) to measure this.Near the breather valve place of an appointment of tank skin, breather valve is extracted on floating roof, the barrel that is used for supporting breather valve at pontoon is made at present footage number note of dipping, at the vertical straight elevation ruler of this mark and at the bottom of guaranteeing that the chi head arrives at tank, reads absolute altitude with spirit level.Dead amount datum mark at the bottom of this absolute altitude is jar.
3.3 subscript target high measurement: with 2.4.
3.4 upper target, upper dipping point level measurement: with 2.5.
3.5 upper and lower target vertical survey: with 2.6.
3.6 the measurement of pontoon floating height and quality: the floating top of single-deck formula: the pot liquid height reach make the complete floating in floating top after the time, spirit-leveling instrument is installed in floating top goes up metastable position, with about 8 five equilibriums of single-deck radius, and fixed numbers, be connected the edge of angle bar on single-deck with cabin with the single-deck that aligns the zero point of ullage rule, to radial direction is basis 8 marks that draw with the fixed numbers, 8 above methods of direction in symmetry on the single-deck make marks on single-deck, scale is vertically stood on mark one by one, with the spirit-leveling instrument reading of data and carry out record.Manhole on the single-deck or vacuum pressure valve, sample tap are opened, are advisable, zero point of scale is close to liquid level, use the spirit-leveling instrument reading numerical values can see liquid level, repeat twice, two take second place difference must not be greater than 1mm.Exchange the position that another place can survey liquid level then for, with said method duplicate measurements twice, its mean value and last time data difference must not get the mean value of many places liquid level greater than 2mm, and carry out record.
Two-layer equation floating roof: after the height of pot liquid is enough to make floating plate to float fully, settling position on floating plate, install spirit level, the hatch of each cabin on the floating plate is all opened, scale vertically stands on the iron plate of cabin bottom by hatch, use the spirit level reading out data, will be with minimum 8 annulus such as branch such as grade that are divided into of floating plate, preferably to get more than 8 on each ring, scale stands on the each point one by one, reading out data, with oil dipstick measure adjacent two the ring between distance.Open sample tap or manhole, zero point of scale is close to liquid surface, make scale vertical, use the spirit-leveling instrument reading of data, difference is taken second place in duplicate measurements twice, two must not be greater than 1mm, hyperphoric position of rule, measure liquid level, the difference of average value measured must not be greater than 2mm with last time, and averaging is innage.
4, with reference to highly measuring
With reference to the vertical range that highly refers between gauge point and the lower gauge point.At first steel wire rope in the sleeve pipe chi pipe and sleeve pipe chi head are connected firmly, the sleeve pipe chi are connected closely by joint also progressively put down along dipping tube then.Behind the lower metering plate of sleeve pipe chi head contact, guarantee that the sleeve pipe chi exceeds about upper stoichiometric point 1m.Be clamped on the middle part of sleeve pipe chi exposed parts with spanner, and make it to rotate in the direction of the clock so that sleeve pipe chi head can be cleared up the deposit at lower metering plate place.After the metering plate deposit is cleared up under confirming (elevation ruler no longer includes and moves down), vertical straight connector chi reads elevation ruler scale corresponding to gauge point, is survey with reference to height.Repeat above-mentioned measurement more than twice, average as jar with reference to height and carry out record.Elevation ruler is unloaded by saving to extract, check that elevation ruler has or not distortion; If any distortion, then should change elevation ruler and remeasure.
5, the total high measurement of tank body
Utilize tank bottom side portion absolute altitude under the same level and lower gauge point absolute altitude, with reference to indirectly measuring the tank body total height along absolute altitude and upper gauge point absolute altitude on the tank body under height, the same level.With the also leveling on last dipping platform of spirit-leveling instrument support.Stand in the upper edge and the dipping hole upper edge of the last layer girth sheets of tank body respectively with the absolute altitude chi, read absolute altitude respectively and carry out record.
6, annex in the tank
For rechecking tank, the initial data the when data of annex can be examined and determine with reference to upper one-period in the tank.Supreme periodic calibration data also can be by inquiry tank delivery receiving acceptance drawing and related data, shape, geometric parameter and the terminal data of each annex (manhole, poke hole, heater, turnover oil pipe, floating roof support leg liner plate thickness etc.) in the record tank.
Providing of data processing and calibrating, calibration certificate
Calibrating, calibration certificate are the consolidated returns to the metering performance of tested measurement instrument, are the net results of measurement verification, calibration operation, also are the foundations that the unit of being examined uses tested measurement instrument to measure.Correctly to provide calibrating, calibration certificate in order reaching fast, to need use modern computer data processing system, to reduce manually-operated, increase work efficiency.
Claims (6)
1, a kind of outer floating roof metal can band liquid-in metrological verification method, it comprises the technical conditions preparation, the environmental condition monitoring, equipment is checked oneself self-correcting, calibrating measuring method and data handling procedure, the calibrating measuring method is the tank body volume to be divided into some parts detect, ask for again the algebraical sum of each several part certified value and correction value, specifically be divided into each girth sheets plate hight, thickness of slab and circumference thereof are measured, with reference to highly measuring, the total high measurement of tank body, annex is measured in the tank, floating roof is measured, the Tank tilting degree is measured, ellipticity measurement, measure at the bottom of the tank, it is characterized in that: measurement comprises at the bottom of the tank: a, tank bottom side portion level measurement: arrange some measuring points around a girth sheets even circumferential in the tank body outside, utilize spirit level and elevation ruler, set up a plurality of related survey stations all measuring points are carried out level measurement, at last the absolute altitude of all measuring points is converted to the absolute altitude on the corresponding level of first survey station, in the utilization, on the measurement horizontal plane when measurement of correlation of lower target is converted to level measurement at the bottom of the tank inner canister with limit standard laid down by the ministries or commissions of the Central Government height; Level measurement at the bottom of b, the tank: after the complete floating of floating roof, the spirit level frame in the stable place of floating roof and leveling, is extracted respectively out every floating roof supporting leg and measured the absolute altitude of floating roof support leg liner plate by elevation ruler, the thickness that this absolute altitude adds support leg liner plate is absolute altitude at the bottom of the tank; C, floating roof supporting leg distribution measuring: each supporting leg distributes on floating roof ringwise, measures the radius or the diameter that respectively enclose the supporting leg place.
2, outer floating roof metal can band liquid-in metrological verification method according to claim 1, it is characterized in that: the measurement with reference to height is at first steel wire rope in the sleeve pipe chi pipe and sleeve pipe chi head to be connected firmly, then the sleeve pipe chi is connected closely by joint and also progressively put down along dipping tube, behind the lower metering plate of sleeve pipe chi head contact, guarantee that the sleeve pipe chi exceeds about upper stoichiometric point 1m, be clamped on the middle part of sleeve pipe chi exposed parts with spanner, and make it to rotate in the direction of the clock so that sleeve pipe chi head can be cleared up the deposit at lower metering plate place, after the metering plate deposit is cleared up under confirming, vertical straight connector chi reads sleeve pipe chi scale corresponding to gauge point, is survey with reference to height; Repeat above-mentioned measurement more than twice, average as the reference height of tank; The sleeve pipe chi is unloaded by saving to extract, check that the sleeve pipe chi has or not distortion, if any distortion, then more the casing replacing chi remeasures.
3, outer floating roof metal can band liquid-in metrological verification method according to claim 1, it is characterized in that: further comprising dead amount datum mark measures, the measurement of dead amount datum mark is the vacuum pressure valve place of an appointment of close tank skin on floating top, vacuum pressure valve is extracted the dead amount datum mark at the bottom of absolute altitude that specified point is measured the corresponding jar end of this point is as jar.
4, outer floating roof metal can band liquid-in metrological verification method according to claim 1, it is characterized in that: during each girth sheets circumference is measured, the top of one girth sheets and jar junction, the end has one section girth sheets not to be incubated and exposes, if can enclosing chi, exposed parts measures the tank body circumference, then enclose the basic circle of circumference of chi measurement as outer survey one girth sheets and other girth sheets radial differences with this, according to counting that vertification regulation requires, 1/4 plate hight place of first girth sheets outside jar in advance, 1/4 and 3/4 plate hight place of other girth sheets is to the heat-insulation layer hand drill, requiring respectively to bore justifier hangs down corresponding so that measure with plumb aligner, with the basic circle is benchmark, the probe scale is inserted drill hole in advance respectively, measure the radial missing value of each girth sheets with plumb aligner.
5, outer floating roof metal can band liquid-in metrological verification method according to claim 1, it is characterized in that: during the outside all insulations of tank body, basic circle in the tank as tank external pelivimetry basic circle, measuring method is to utilize target that basic circle position in the tank is returned to measure the outer correspondence position of tank and get out measured hole at heat-insulation layer by hand, and with girth sheets corresponding to this hole outside as the benchmark of measuring other girth sheets radial differences on this place, hole plumb line, the radial difference that utilization records is considered the thickness of slab of each girth sheets, the internal diameter that the basic circle girth just can calculate each girth sheets again; According to counting that vertification regulation requires, get out the measured hole of datum hole and other girth sheets 1/4, the corresponding datum hole of 3/4 plate hight place plummet at heat-insulation layer along circumference, one girth sheets is only holed at 3/4 plate hight place, the probe scale is inserted respectively in advance drill hole, measure the radial missing value of each girth sheets with plumb aligner.
6, outer floating roof metal can band liquid-in metrological verification method according to claim 1 is characterized in that: floating top is measured and is comprised:
The floating top of single-deck formula: spirit-leveling instrument is installed in floating top goes up metastable position, with about 8 five equilibriums of single-deck radius, and fixed numbers, be connected the edge of angle bar on single-deck with cabin with the single-deck that aligns the zero point of ullage rule, to radial direction is basis 8 marks that draw with the fixed numbers, 8 above methods of direction in symmetry on the single-deck make marks on single-deck, scale is vertically stood on mark one by one, with the spirit-leveling instrument reading of data and carry out record, supersonic thickness meter is installed, measure single-deck thickness, repeatedly measure and get its mean value and carry out record;
Two-layer equation floating roof: spirit level is installed in metastable position on the floating roof, the hatch of each cabin on the floating plate is all opened, scale vertically stands on the iron plate of cabin bottom by hatch, with the spirit level reading out data and make a record, install sonigauge, enter in the cabin, measure the thickness of bottom steel plate, measure the thickness of minimum 4 cabins bottom steel plate, average and make a record.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102252578A (en) * | 2010-05-20 | 2011-11-23 | 中国石油化工股份有限公司 | Measuring instrument and measuring method for radial deviation and detecting method for capacity of metal can with liquid |
| CN102128578B (en) * | 2010-01-12 | 2012-07-25 | 中国石油化工股份有限公司 | Method for measuring elevation of bottom of tank with liquid and method for measuring volume of bottom of tank with liquid |
| CN104422412A (en) * | 2013-08-26 | 2015-03-18 | 北京金旗华瑞科技发展有限公司 | Cave tank volume detecting method, device and system |
| CN106949804A (en) * | 2017-05-10 | 2017-07-14 | 舟山市质量技术监督检测研究院 | A kind of device for vertical metal tank solid measure |
| CN111982047A (en) * | 2020-09-18 | 2020-11-24 | 舟山市质量技术监督检测研究院 | Device, method and system for measuring height of storage tank ring plate |
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2005
- 2005-03-24 CN CN 200510046109 patent/CN1277100C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102128578B (en) * | 2010-01-12 | 2012-07-25 | 中国石油化工股份有限公司 | Method for measuring elevation of bottom of tank with liquid and method for measuring volume of bottom of tank with liquid |
| CN102252578A (en) * | 2010-05-20 | 2011-11-23 | 中国石油化工股份有限公司 | Measuring instrument and measuring method for radial deviation and detecting method for capacity of metal can with liquid |
| CN102252578B (en) * | 2010-05-20 | 2014-03-26 | 中国石油化工股份有限公司 | Measuring instrument and measuring method for radial deviation and detecting method for capacity of metal can with liquid |
| CN104422412A (en) * | 2013-08-26 | 2015-03-18 | 北京金旗华瑞科技发展有限公司 | Cave tank volume detecting method, device and system |
| CN106949804A (en) * | 2017-05-10 | 2017-07-14 | 舟山市质量技术监督检测研究院 | A kind of device for vertical metal tank solid measure |
| CN106949804B (en) * | 2017-05-10 | 2022-11-18 | 舟山市质量技术监督检测研究院 | Device for measuring capacity of vertical metal can |
| CN111982047A (en) * | 2020-09-18 | 2020-11-24 | 舟山市质量技术监督检测研究院 | Device, method and system for measuring height of storage tank ring plate |
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| CN1277100C (en) | 2006-09-27 |
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