CN201066116Y - Communicating vessels type drum water level sampling and measuring device - Google Patents
Communicating vessels type drum water level sampling and measuring device Download PDFInfo
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- CN201066116Y CN201066116Y CNU2007200384577U CN200720038457U CN201066116Y CN 201066116 Y CN201066116 Y CN 201066116Y CN U2007200384577 U CNU2007200384577 U CN U2007200384577U CN 200720038457 U CN200720038457 U CN 200720038457U CN 201066116 Y CN201066116 Y CN 201066116Y
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 238000005070 sampling Methods 0.000 title claims abstract description 72
- 210000000038 chest Anatomy 0.000 claims description 51
- 238000005259 measurement Methods 0.000 claims description 48
- 238000001816 cooling Methods 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000010865 sewage Substances 0.000 abstract 2
- 238000005406 washing Methods 0.000 abstract 2
- 239000010445 mica Substances 0.000 description 8
- 229910052618 mica group Inorganic materials 0.000 description 8
- 238000007664 blowing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000014171 carbonated beverage Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000000556 factor analysis Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- -1 magnetic float Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000630 rising Effects 0.000 description 1
- 230000003068 static Effects 0.000 description 1
- 238000004326 stimulated echo acquisition mode for imaging Methods 0.000 description 1
- 230000001131 transforming Effects 0.000 description 1
Abstract
The utility model discloses a communicating vessels steam manifold water level sampling measuring device which includes a steam communicating tube, a water communicating tube, a measuring barrel and a sewage discharge washing tube. The sealed measuring barrel includes a measuring section provided with a water detecting sensing device. The upper and the lower parts of the measuring section in the measuring barrel are respectively communicated with a connecting tube for a steam detecting hole and a connecting tube for a water detecting hole through the steam communicating tube and the water communicating tube. A sewage discharge washing section is arranged at the lower part of the measuring barrel. The upward side of the measuring barrel is provided with an additional steam chamber conveying condensed water to the measuring section. The utility model with simple structure and sampling pipeline system solves the problem of seriously poor sampling of a communicating measuring device and leads the sampling accuracy to be able to meet the permitted requirements on the water monitoring with high voltage, supervoltage and subcritical boiler steam manifold and the boiler-stop protection, and the utility model accords with the relevant national technical standards.
Description
Technical field:
The utility model relates to the thermal measurement technical field, and particularly high pressure, super-pressure, subcritical boiler drum level measurement technology specifically are a kind of connected vessels type steam pocket water level sampling and measuring devices.
Background technology:
The steam water-level meter is the important safety attachment of boiler.At present, the drum level measurement system configuration has only connected vessels type, differential pressure type two class measurement mechanisms.
Linker class measurement mechanism in usefulness roughly has 4 kinds: mica water level meter, electric contact point fluviograph, magnetic turnover panel water level meter, electric capacity water level meter.As shown in Figure 1, the agent structure of these several water level meters is a straight barrel (or straight housings), its water sampling pipe, vapour probe tube are with after vapour, water gaging hole on the drum is connected respectively, cylindrical shell and drum have just been formed linker, vapour, water in the drum enter measurement mechanism, behind the static balance of linker both sides, water column is exactly a sampling water column of measuring steam water-level in the cylindrical shell, and its height is corresponding with water level in the drum.Water level meter level sensor parts separately directly detect the interface of sampling water column and vapour post, thereby measure water level in the drum indirectly.
Above-mentioned 4 kinds of water level meters difference is the principle difference that detects the inner barrel water level: mica water level meter is by mica form scale direct-reading water level; Electric contact point fluviograph is by means of a plurality of electric contacts are installed in cylindrical shell, by the carbonated drink side electric contact different sensed water level of resistance to earth value difference and to distant place sensing level measuring signal; Electric capacity water level meter is to form capacitance type sensor by means of the insulating bar of installing in cylindrical shell and barrel wall, and according to the dielectric constant difference of carbonated drink, water level and capacitance be principle one to one, sensed water level and to distant place sensing level measuring signal; Magnetic turnover panel water level meter, by means of in cylindrical shell, can swim in water level in the magnetic float sign tube at water column top, and the magnetic force of dependence float is to external sense and show water level.The error that preceding 3 kinds of devices directly detect water level in the cylindrical shell is all very little, and the error of then measuring steam water-level indirectly depends on the difference in height of water level in water column and the drum, i.e. sampling error.Magnetic turnover panel water level meter detects the changing value that an error of interior water level equals the float draft, but because the height of float is compared very little with the sampling water column, the draft changing value is more much smaller than the shrinkage value that sampling water major gene temperature reduces, and also determines in sampling water column error so its indirect MEASUREMENT OF STEAM bag water level error is got.
The reason that the sampling water column is lower than water level formation sampling error in the drum is that temperature, the density of sampling water column is lower than saturation water temperature, density in the drum.Not only partly the heat dissipation capacity of environment is relevant towards periphery with the device water column for the sampling water column temperature, also to bring the heat of sampling water column into relevant with the condensate water that the surface radiating of device vapour post part produces, and the latter does not cause that as yet people pay close attention to and the sampling error problem that solves traditional linker class measurement mechanism of no use.
The defective of tradition linker class measurement mechanism design is, when water column is elevated to certain altitude, it is more much smaller than the heat dissipation capacity of water column part that the condensate water that the vapour post produces is brought the heat of water column into, and sampling water column mean temperature is more much lower than water temperature in the drum, forms very big sampling error.Sampling error increases along with the rising of drum pressure, and water level is healed high level error more greatly.When other brought up to super-pressure (15Mpa), subcritical pressure boiler (20Mpa) rank when the boiler pressure level: the sampling error of 0 water level (the normal operating water level of boiler) reached 100mm, 150mm respectively, does not allow for the operation monitoring regulation; The sampling of high water level blowing out value is 200mm on the low side, 250mm (annotate: high water level blowing out value is near the water level metering journey upper limit) respectively, more can cause protecting the safety of moving serious the hysteresis and jeopardizing boiler and steam turbine, obviously can not be used for the full water protection of boiler during shutdown period.
According to the actual needs of steam water-level operation characteristic and safety guarantee, boiler and thermal technology's industry senior think, should embody " reliable the first, accurate second " principle to water level meter performance demands.The boiler factory is qualified in order to guarantee the saturated vapor quality; the regulation normal operating water level of drum (0 water level) excursion is-50mm is to+50mm; this means; measuring and allowing maximum error is 50mm; consider from operation angle; as long as measured value is stable, the reliability of water level meter can guarantee can not cause protection malfunction blowing out, and the 50mm error of 0 water level also can be born." heat power plant boiler drum level measurement systems technology regulation DRZ/T 01-2004 " requirement of issue in 2004, water level instrumentation amount deviation is not more than 30mm, can further guarantee 0 water level operation control level.Consider from the actual needs of safety guarantee; when water level arrives high water level blowing out value; even if measured deviation arrives 50mm greatly; as long as the water level meter can send high water level blowing out signal enabling protection of boiler during shutdown period reliably; just can guarantee device security, this means that it is 50mm that the protection of boiler during shutdown period level measuring allows maximum error.
Above-mentioned situation shows that the connected vessels type measurement mechanism is used for super-pressure, there is serious sampling error in subcritical pressure boiler, is that operation and safety guarantee institute is unallowed, its sampling error should be reduced in the allowed band.
In the technological transformation of traditional connected vessels type measurement mechanism, some technology is exceedingly pursued high-accuracy sampling, for example steam heater is set in the hope of eliminating sampling error in device inside, cause the accuracy remaining excessive, its cost is: the structure complicated that makes measurement mechanism, steam-heated discharge pipe line need be installed by the sampling line system, need perforate fix a drainpipe on the very thick down-comer of tube wall, has increased measurement mechanism cost and installation workload far and away; Increasing of the complexity of structure and pipeline strengthened operation maintenance and fault diagnosis difficulty.These factors influence applying of new product to a certain extent.
The senior of boiler and thermal technology's industry thinks, be necessary to research and develop a kind of novel connected vessels type measurement mechanism, its sampler structure and sampling line system are still very simple, I﹠M is most convenient still, but sampling precision still can reach steam water-level security monitoring and equipment security personnel requirement, meets national correlation technique standard.
The utility model content
In view of the above problems; the utility model provides a kind of simple in structure, connected vessels type steam pocket water level sampling and measuring device cheaply; be intended to solve traditional connected vessels type measurement mechanism serious overproof problem of taking a sample, make its sampling error, dynamic responding speed all can satisfy the requirement of high pressure, super-pressure, the monitoring of subcritical boiler steam water-level and protection of boiler during shutdown period.
A kind of connected vessels type steam pocket water level sampling and measuring device described in the utility model, it comprises vapour communicating pipe, water communicating pipe, measures tube and blowdown cleaning hose, comprise a metering section that the water level detecting sensing device is installed in the airtight measurement tube, the top and the bottom of measuring metering section in the tube are respectively by vapour communicating pipe with water communicating pipe takes over the vapour gaging hole on the drum and the adapter of water gaging hole is connected, the blowdown cleaning hose is located at the bottom of measuring tube, it is characterized in that: be provided with additional steam chest from condensate water to metering section that carry above measuring tube.
The cooling surface area of above-mentioned additional steam chest cylindrical shell should be greater than the cooling surface area of measuring tube metering section part.
Above-mentioned additional steam chest cylindrical shell can be a cylindrical shell that directly links to each other with the metering section cylindrical shell, also can be a plurality of relatively independent closed containers and is connected with the metering section cylindrical shell by pipeline.In order to improve radiating effect, on additional steam chest, radiated rib can also be set.
Above-mentioned metering section partly is meant, the container part between water communicating pipe and the vapour communicating pipe mouth of pipe center line, and its length is the maximum range that device can be selected.Measure the metering section water level and can adopt different principle, multi-form detection sensing device to measure, for example electric contact, capacitor, magnetic float, mica sheet form and scale.Metering section partly is generally cylindrical shell or housing.
Making the cooling surface area of measurement mechanism metering section water column part and the ratio of measurement mechanism steam chest part (comprising metering section vapour post and additional steam chest part) radiating segment surface area is β.The utility model calculates needed β value by the given sampling error goal-setting value of operation monitoring protection.If require the sampling error of measurement mechanism to be not more than the goal-setting value, then the β value can not be greater than 1, and promptly the cooling surface area of metering section part is not more than the cooling surface area of additional steam chest cylindrical shell.So, the little β value design that the utility model is taked, compare with traditional connected vessels type measurement mechanism structure, its technical measures are: 1., can normally detect and be convenient to install and meet under the prerequisite of requirement of strength satisfying the sensing detection parts, reduce the metering section part cross sectional dimensions of measurement mechanism as far as possible, to reduce the cooling surface area of metering section part; 2., measuring above the tube, additional steam chest cylindrical shell is set above the metering section part promptly, carries out the steam chest partial volume of water level sampling and the cooling surface area of steam chest part cylindrical shell to strengthen measurement mechanism, the formation of additional steam chest is seen before and is stated; 3., take measures simultaneously 1. with 2., or when 1. measure is difficult to carry out and can only singlely take measures 2..These measures can make the radiating segment surface area ratio of metering section part and additional steam chest part be not more than the β calculated value.
At geometric parameters such as cylindrical shell metering section length is some known parameters, or by the confirmable parameter of experience, so just can calculate the surface area of additional steam chest part by the β calculated value, determines the specific design parameter of additional steam chest part cylindrical shell then.
The theoretical foundation of this technical scheme is as follows:
Reduce sampling error, the density contrast of water body in need reduce to take a sample water column and the drum then need improve some temperature t at the bottom of the water column
d
Put temperature t at the bottom of influencing water column
dFactor analysis.With the sampling water column is research object, and the equilibrium condition of research heat input and heat output is set up the water column equation of heat balance, at drum pressure, steam water-level, when environment temperature is given value, can obtain some temperature value t at the bottom of the water column
dAnalytic expression t
d=t
c+ (t
h-t
c)/e
m, in the formula, t
hBe saturation water temperature, t
cBe environment temperature.e
mThe exponent m value be C
p, r, β value function, C
pBe the average specific heat at constant pressure of water under drum pressure, r is the latent heat of vaporization of saturation water under the drum pressure.The m value is again the once linear function of β value, is proportional to the long-pending F of water column drum surface
s, be inversely proportional to vapour column casing body surface area F
q, i.e. β=F
s/ F
qThe β value is little, and then m is little; The β value is big, and then m is big.Obviously, improve some temperature value t at the bottom of the water column
d, need to reduce β (F
s/ F
q) value, this just needs: the area of dissipation F that reduces sampling water column casing body
s, reduce the heat dissipation capacity of water column; Increase the surface area F of entire container device vapour post part
q, to increase the heat of saturated vapor condensate water input water column, this is the theoretical foundation that additional steam chest is set.
The reasonable design method of little β value connected vessels type measurement mechanism is analyzed as follows.
Point temperature t at the bottom of given target water level H, sampling error dH and the metering section water column
dBe one to one.So, just can calculate metering section water column averag density, water column mean temperature, some temperature t at the bottom of the water column by linker sampling gravitational equilibrium equation
d
Point temperature t at the bottom of the water column
dWith the cooling surface area of measurement mechanism metering section water column part and the ratio beta of measurement mechanism steam chest part cooling surface area also be one to one.So, behind the equation of heat balance of setting up the sampling water column, by some temperature t at the bottom of the water column
d, just can calculate β value, β=C
p(t
h-t
d) r
-1Ln[(t
h-t
c)/(t
d-t
c)], in the formula: t
hBe saturation water temperature, t
cBe environment temperature, t
dBe some temperature at the bottom of the water column, C
pBe from t under drum pressure
hTo t
dThe average specific heat at constant pressure of water in the temperature range, r is the latent heat of vaporization of saturation water under the drum pressure, ln natural logrithm symbol.
So β value calculated value is that the utility model can satisfy the technical parameter that sampling error requires.
The physical dimension of drum level measurement device of the present utility model step is as follows determined:
(1) the metering section physical dimension of selected measurement mechanism.
Determine the internal diameter of metering section cylindrical shell according to the size of sensing detection parts, and, calculate external diameter and circumference by the definite metering section cylindrical shell wall thickness of pressure parts intensity calculating.Measure tube and measurement by capacitance tube, its outside diameter d for electric contact
cBe advisable for 0.45 ~ 0.6 times that is traditional measurement tube diameter.Can calculate by experience and intensity equally and determine the square casing cross section outer contour minimum perimeter polygon and the length of side.
Metering section length is the maximum range of water level meter, is that the supporting water level meter of boiler design is made fixed data.
Metering section data, metering section barrel diameter or cross section outer contour minimum perimeter polygon have been arranged, then can calculate the surface area of metering section cylindrical shell.
(2) selected allowable error value.
Owing to measure the sampling error maximum of the upper limit, again because high water level blowing out value is measured the upper limit near metering section, its sampling error is also near upper limit sampling error, so selected upper limit sampling error dH
SxIt is 1 main design object value.DH
SxImplication be the sampling error when water-column h equals the metering section length L.
Because 0 water level is the level monitoring of water level long-time running, allowable error is often less, so selected 0 water level sampling error dH
oIt is 1 auxiliary design object value.DH
oImplication be to be h in water-column
oSampling error.
(3) press dH
Sx, dH
oValue is calculated its water column cylindrical shell and the needed surface area ratio of steam chest cylindrical shell β respectively.
Length L, dH according to linker vapour, water gravitational equilibrium equation and metering section
SxAnd 0 water level sampling water-column h
o, dH
oBe worth, calculate the sampling water column averag density ρ of its correspondence respectively
Cp, can get ρ
CpCorresponding water column mean temperature t
Cp, some temperature t at the bottom of the water column
dBy empirical equation t
d=3t
Cp-2t
hCalculate (the t in the formula
hBe the saturation water temperature).
By β=C
p(t
h-t
d) r
-1Ln[(t
h-t
c)/(t
d-t
c)], calculate dH respectively
Sx, dH
oBe worth pairing β value (the physical quantity implication is seen before and stated in the β calculating formula).
(4) determine additional steam chest cylindrical shell physical dimension.
By dH
SxThe β value of calculating is exactly the surface area ratio of whole metering section part and additional steam chest part.Because the surface area of metering section shell portion is determined, promptly can calculate the surface area F of additional steam chest part
Qb
For by dH
oThe β value of calculating, the water column section drum surface amasss F
sBe by water-column h
oCalculate the vapour column casing body surface area F in the metering section
QJBy vapour post height is L-h
oCalculate.Make the long-pending F of the above additional steam chest part surface of metering section
Qb, so, for entire measuring device, the steam chest drum surface amasss F
qBe the vapour column casing body in the metering section and additional steam chest part surface long-pending sum, i.e. F
q=F
QJ+ F
Qb, dH
oPairing β=F
s/ (F
QJ+ F
Qb), then calculate dH
oThe long-pending value of pairing additional steam chest part surface F
Qb
At dH
o, dH
GtBe worth the long-pending F of needed additional steam chest part surface
QbIn the value, get F
QbBe worth big person and determine additional steam chest cylindrical shell profile, diameter, length, and the parameters such as pipeline that belong to additional steam chest part.
Because area is F
QdAdditional steam chest cylindrical shell different geometries and size can be arranged, and the connected mode of compensated chamber's cylindrical shell and metering section cylindrical shell also has various.If with respect to the metering section cylindrical shell, the volume of additional steam chest cylindrical shell is also much bigger, and in making and installing, additional steam chest cylindrical shell also can be the assembly of two, three little steam chest cylindrical shells, is connected with the metering section cylindrical shell by pipeline for convenience.If additional steam chest cylindrical shell is cylindrical, is metering section barrel diameter d to justify mean outside diameter
c1.7 ~ 2.5 times for the most suitable.The water level detecting sensing device of installing owing to metering section has diversity again, so the utility model has a plurality of embodiment.
The utility model beneficial effect:
(1) the utility model is set in known metering section cylindrical shell length with by empirical data under the long-pending condition of its drum surface, by the sampling error of key point water level as the design object value, determine the surface area ratio β of sampling water column casing body and steam chest cylindrical shell, calculate additional steam chest barrel radiation surface area on the metering section by the β value again, finish the measurement mechanism design then.So, the measurement mechanism of institute's utility model in use, when steam water-level was the design object water level, then actual sampling error can reach the design object value, can be less than the sampling error of traditional connected vessels type measurement mechanism target water level.
(2) little β value connected vessels type measurement mechanism has been accelerated metering section water column temperature changing speed, and the response speed that pressure is changed is greater than traditional connected vessels type measurement mechanism.
(3) little β value connected vessels type measurement mechanism structure has been accelerated the replacing speed of saturated vapor condensate water to the metering section water column, so water column water quality is good, is beneficial to and detects component stable detection sensing, and prolong the blowdown flushing cycle.
(4) the utility model simple in structure, be easy to make, it needs supporting sampling line system the simplest, can reduce installation workload, helps enforcement of the present utility model and popularization.
Description of drawings:
Accompanying drawing 1 is to measure tube with electric contact to be typical traditional connected vessels type measurement mechanism and sampler schematic diagram;
Accompanying drawing 2 is measured tube (first embodiment) structure and sampler schematic diagram for the utility model electric contact;
Accompanying drawing 3 is that the utility model magnetic turnover panel is measured tube (second embodiment) structural representation;
Accompanying drawing 4 is the utility model measurement by capacitance tube (the 3rd routine embodiment) structural representation;
Accompanying drawing 5 is the utility model mica water level meter (the 4th embodiment) structural representation.
The specific embodiment:
Now narrate it in conjunction with the accompanying drawings.
The similarities and differences of the electric contact measurement tube of one of tube and the utility model embodiment are measured in accompanying drawing 1 and accompanying drawing 2 clear displayings, traditional electrical contact.Its something in common: it is identical that the vapour on the drum, water gaging hole are taken over 1,2 centre-to-centre spacing, and it is also identical with 4 centre-to-centre spacing to measure vapour on the tube, water communicating pipe 3, and the length of metering section 8 all is L; The specification of vapour communicating pipe 3 is identical, water communicating pipes 4 specification identical.These identical points can make the utility model change the workload minimum that the traditional electrical contact is measured tube.Identical point also has, and all is the closed container 5 that has blow-off pipe 6 and electric contact detection components 7.Difference: the utility model metering section is with the additional steam chest 9 that upper shell is special setting, surface area is very big, and the traditional electrical contact is measured the then additional steam chest of tube; Metering section 8 cylindrical shell external diameters of the present utility model are measured the metering section 8 cylindrical shell external diameters of tube less than the traditional electrical contact; When water level H was identical in drum, sampling water column h of the present utility model measured sampling water column height than traditional electrical contact, and sampling error dH promptly of the present utility model is significantly less than the sampling error of traditional measurement device.
First embodiment:
Present embodiment is seen accompanying drawing 2, and concrete measurement mechanism is that electric contact is measured tube.Have the additional steam chest cylindrical shell 9 of loudspeaker reducing and the extension on the metering section cylindrical shell 8 and be weldingly connected, the extension has vapour communicating pipe 3.Electric contact electrode assemblie 7 is installed on the metering section cylindrical shell 8, and the bottom of metering section cylindrical shell 8 has water communicating pipe 4, and blow-off pipe 6 is arranged at closed container 5 bottoms.
Second embodiment:
Present embodiment is seen accompanying drawing 3, and concrete measurement mechanism is a magnetic float measurement tube.Additional steam chest cylindrical shell 9 in the present embodiment is weldingly connected with the extension on the metering section cylindrical shell 8, and metering section cylindrical shell 8 has vapour sampling adapter 3, water communicating pipe 4 up and down.There is hollow cylindrical magnetic float 10 metering section cylindrical shell 8 inside, and floatability is at the water column top, and the center of gravity of magnetic float is in the bottom.Metering section cylindrical shell 8 is outside installs a plurality of magnetic board turnings 11, the magnetic board turning the magnetic float near the time can overturn automatically 180 °, with sign with show water level.Metering section cylindrical shell 8 extensions are connected with the blue assembly 12 of method, take assembly apart, can take out the magnetic float, and blow-off pipe 6 is arranged at the assembly bottom.
The 3rd embodiment:
Present embodiment is seen accompanying drawing 4, and concrete measurement mechanism is the measurement by capacitance tube.The feature of the additional steam chest cylindrical shell 9 in the present embodiment is combined barrels of two steam chests, this combination is by pipeline two steam chest cylindrical shells to be parallel to extension on the metering section cylindrical shell 8, so, adding the steam chest drum surface long-pending is the surface area sum of metering section cylindrical shell 8 above each several parts.Metering section cylindrical shell 8 has vapour sampling adapter 3, water communicating pipe 4 up and down.Extension welded top on the metering section cylindrical shell 8 has ring flange 14, is connected with flange capacitance component 15.The capacitance pole rod 13 of the tape insulation in the flange capacitance component 15 is inserted in the metering section cylindrical shell, and capacitance pole rod 13 is formed the condenser type level sensor with barrel.Closed container 5 bottoms have blow-off pipe 6 to connect.
The 4th embodiment:
Present embodiment is seen accompanying drawing 5, and concrete measurement mechanism is a mica water level meter.Additional steam chest feature in the present embodiment is the additional steam chest cylindrical shell 9 that has radiated rib 17.Extension on the metering section cylindrical shell 8 has vapour communicating pipe 3, and is weldingly connected with additional steam chest cylindrical shell 9.Metering section cylindrical shell 8 bottoms have water communicating pipe 4, and blow-off pipe 6 is connected.Metering section cylindrical shell 8 has mica form and scale assembly 16, and this part cylindrical shell cross section outline is square, sees through the interface that mica sheet can be seen interior water column of cylindrical shell and vapour post, measures water-column, direct-reading water level by means of rule.
In sum, the utility model is compared with prior art keeping the simplest structure and the simplest survey Measure the sample system simultaneously, can make the sampling and measuring precision reach steam water-level security monitoring and equipment security personnel requirement, symbol Close relevant regulations such as " heat power plant boiler Drum Level Measurement System technical stipulation DRZ/T 01-2004 " Latest requirement.
Claims (6)
1. connected vessels type steam pocket water level sampling and measuring device, it comprises vapour communicating pipe (3), water communicating pipe (4), measure tube (5) and blowdown cleaning hose (6), comprise a metering section (8) that the water level detecting sensing device is installed in the airtight measurement tube (5), the top and the bottom of metering section (8) take over (1) by vapour communicating pipe (3) and water communicating pipe (4) with the vapour gaging hole on the drum respectively and water gaging hole adapter (2) is connected, blowdown cleaning hose (6) is located at the bottom of measuring tube (5), it is characterized in that: be provided with additional steam chest (9) from condensate water to metering section that carry above measuring tube (5).
2. connected vessels type steam pocket water level sampling and measuring device according to claim 1 is characterized in that: the cooling surface area of additional steam chest (9) cylindrical shell is greater than the cooling surface area of measuring metering section (8) part in the tube.
3. connected vessels type steam pocket water level sampling and measuring device according to claim 1 and 2 is characterized in that: described additional steam chest (9) is a cylindrical shell that directly links to each other with metering section (8) cylindrical shell.
4. connected vessels type steam pocket water level sampling and measuring device according to claim 1 and 2 is characterized in that: described additional steam chest (9) is a closed container independently, its by pipeline with measure tube (5) and link to each other.
5. connected vessels type steam pocket water level sampling and measuring device according to claim 1 and 2 is characterized in that: be provided with radiated rib (17) on additional steam chest (9).
6. connected vessels type steam pocket water level sampling and measuring device according to claim 1 and 2 is characterized in that: the cylindrical shell of described additional steam chest (9) is a cylinder, and its circle mean outside diameter is 1.7 ~ 2.5 times of metering section barrel diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200384577U CN201066116Y (en) | 2007-07-10 | 2007-07-10 | Communicating vessels type drum water level sampling and measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200384577U CN201066116Y (en) | 2007-07-10 | 2007-07-10 | Communicating vessels type drum water level sampling and measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201066116Y true CN201066116Y (en) | 2008-05-28 |
Family
ID=39483295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200384577U Expired - Fee Related CN201066116Y (en) | 2007-07-10 | 2007-07-10 | Communicating vessels type drum water level sampling and measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201066116Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100580315C (en) * | 2007-07-10 | 2010-01-13 | 高维信 | Connected vessels type steam pocket water level sampling and measuring device and method for deciding its geometric size |
| CN102680279A (en) * | 2012-06-14 | 2012-09-19 | 上海泽泉科技有限公司 | Device and method for sampling water body buoy section |
| CN106950615A (en) * | 2017-04-27 | 2017-07-14 | 南通惠能信息科技发展有限公司 | A kind of cylinder type high precision electro contact rainfall gauge |
-
2007
- 2007-07-10 CN CNU2007200384577U patent/CN201066116Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100580315C (en) * | 2007-07-10 | 2010-01-13 | 高维信 | Connected vessels type steam pocket water level sampling and measuring device and method for deciding its geometric size |
| CN102680279A (en) * | 2012-06-14 | 2012-09-19 | 上海泽泉科技有限公司 | Device and method for sampling water body buoy section |
| CN102680279B (en) * | 2012-06-14 | 2014-02-12 | 上海泽泉科技有限公司 | Device and method for sampling water body buoy section |
| CN106950615A (en) * | 2017-04-27 | 2017-07-14 | 南通惠能信息科技发展有限公司 | A kind of cylinder type high precision electro contact rainfall gauge |
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Granted publication date: 20080528 Termination date: 20100710 |