CN202032557U - Overtemperature protection device for vertical boiler - Google Patents
Overtemperature protection device for vertical boiler Download PDFInfo
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- CN202032557U CN202032557U CN2011200563728U CN201120056372U CN202032557U CN 202032557 U CN202032557 U CN 202032557U CN 2011200563728 U CN2011200563728 U CN 2011200563728U CN 201120056372 U CN201120056372 U CN 201120056372U CN 202032557 U CN202032557 U CN 202032557U
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- temperature
- temperature sensor
- boiler
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- protection device
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims description 13
- 239000010865 sewage Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 abstract description 6
- 238000009529 body temperature measurement Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000003020 moisturizing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The utility model relates to an overtemperature protection device for a vertical boiler. The output of temperature sensors of the overtemperature protection device is connected with a temperature signal processing circuit, the output of the temperature signal processing circuit is connected with an alarm and a water pump, the temperature sensors comprise a first temperature sensor, a second temperature sensor and a third temperature sensor, wherein the first temperature is welded on the wall surface of a cupola aligned with the lowest safe water level, the second temperature sensor is welded on the wall surface of the cupola in a position above the highest fire line, and the third temperature sensor is inserted into saturated water at the lower part of a boiler body. The overtemperature protection device overcomes the defects that the accurate judgment of the work condition in the boiler body of the boiler is lacked in single wall temperature measurement, false alarm and missed alarm can still be caused, and similar accidents can not be eliminated. The overtemperature protection device controls the water level of the boiler according to the detected real-time temperature, the temperature difference and the temperature gradient signals of the boiler, the influence caused by the pressure, the water quality and the scale in the boiler does not exist, the safety and the reliability are high, the structure is simple, the cost is low, and the rushed water supply by boiler operators is prevented.
Description
Technical field
The utility model relates to a kind of boiler safety device, particularly a kind of vertical boiler overtemperature protection device.
Background technology
The explosion accident of vertical boiler generation body, major part is because behind the boiler serious water shortage, metal is in the overtemperature state of overheated even burning, the intensity of boiler body is seriously undermined, at this moment, the fireman starts feed pump in fear, carries out the moisturizing operation, the instantaneous water vapor of intaking causes pot inner pressure to rise sharply, and leads to pernicious explosion accident.Therefore, the boiler overheat protection generally realizes by the control boiler water level.
Before the present utility model, existing water level controller mainly contains four kinds of float-ball type, electric pole type, condenser type and temperature induction types etc.Wherein, the temperature induction type water level controller generally is by saturation water temperature in the temperature sensor measurement pot, this temperature and design temperature is compared judge water level again.Under the more situation of this type systematic incrustation scale in the relatively poor stove of water quality, operating mode can the off-design operating mode in the boiler, and predefined temperature will no longer be suitable for and cause reporting by mistake.Temperature induction type protection system reliably, the wall temperature of directly measuring flue with a measuring point be as guard signal, this temperature and design temperature compared judge whether to have taken place the no-water dry combustion situation again.But this system in use, because reference temperature is to set according to the condition under the nominal steam pressure, the normal wall temperature of flue is relevant with steam pressure in the body of heater, and boiler when using steam pressure change, so single wall temperature measurement, shortage still can cause wrong report to fail to report to the accurate judgement of operating mode in the boiler furnace, can not stop similar accident.
Summary of the invention
The purpose of this utility model just is to overcome above-mentioned defective, and a kind of effective vertical boiler overtemperature protection device is provided.
The technical solution of the utility model is:
Temperature sensor signal output connects the processes temperature signal circuit, the output of processes temperature signal circuit connects alarm, water pump, its major technique is characterised in that described temperature sensor has three, first temperature sensor is welded on the impact tube wall concordant with lowest safe waterline, second temperature sensor is welded on the flue wall of the highest pyrosphere position, and the 3rd temperature sensor is inserted in the saturation water of bottom of furnace body.
Advantage of the present utility model and effect are that real time temperature, temperature difference and the rate of temperature change signal of the boiler that obtains according to detection judge the water level of boiler, are not subjected to the influence of furnace pressure, water quality, incrustation scale, security and reliability height; Simple in structure, no movement parts, cost is low, and the line service amount is little; Automatically monitor lowest safe waterline, warning automatically, slowly water inlet; Initiatively cut off feed pump when urgent, prevent that the boiler attendance personnel from feeding water rashly.
Expression other advantages of the utility model and effect will go on to say below.
Description of drawings
Fig. 1---the utility model structural principle block diagram.
Fig. 2---the utility model mounting structure schematic diagram.
Each label is represented among the figure:
The specific embodiment
Following case study on implementation can make those skilled in the art more fully understand the design, but limits the utility model never in any form.
As accompanying drawing 1, shown in Figure 2:
The signal of temperature sensor 1A in the temperature sensor 1, temperature sensor 1B and temperature sensor 1C is at first gathered and is calculated through processes temperature signal circuit 2, obtains respectively: the lowest safe waterline 9 wall surface temperature Ta of place, the wall surface temperature T of the highest pyrosphere position 10
b, the saturation water temperature T
c, temperature difference Δ T
Ac(Δ T
Ac=T
a-T
c), temperature difference Δ T
Bc(Δ T
Bc=T
b-T
c), and said temperature and temperature difference rate over time; Then, processes temperature signal circuit 2 is judged present water level situation according to above-mentioned parameter; At last, start alarm 3 and give water inlet in the boiler furnace 5 according to the judgement situation, locking feed pump 4 when perhaps alarm 3 starts.
Detailed process is as follows:
When vertical boiler normally moves, its water level is fluctuation up and down near ordinary water level (line) 7, this moment impact tube 7 the bottom and be welded to connect all-in-one-piece flue 6 below the water surface with it, reliably being cooled off not can overtemperature, and the wall surface temperature of the bottom of impact tube 7 and flue 6 is higher about 70 ℃ than the saturated-steam temperature under the corresponding pressure.For example, a LSG0.5-0.2 type boiler, rated operating pressure is 0.2MPa, the temperature of saturation water and steam is 134 ℃ under this pressure, thereby the wall surface temperature of the bottom of impact tube 7 and flue 6 is approximately 204 ℃; Because boiler temperature sensor 1 all is positioned at below the water surface wall surface temperature T at lowest safe waterline 9 places
aThe wall surface temperature T at 10 places, the highest pyrosphere position
bSubstantially remain unchanged, maintain near 204 ℃; Saturated water temperature T
cMaintain about 134 ℃ temperature difference Δ T
AcWith Δ T
BcMaintain about 70 ℃.
When the water level in the boiler furnace 5 is lower than lowest safe waterline 9 but is higher than the highest pyrosphere position 10; temperature sensor 1A is arranged in actual water surface top and is exposed to steam; because the heat radiation of furnace flame and the high temperature of high-temperature flue gas wash away; the wall of this position impact tube 7 lacks the cooling protection effect of stove water, wall surface temperature T
aCan sharply rise, with saturated water temperature T
cBetween difference DELTA T
AcWill sharply increase; The temperature sensor 1B that this moment, installed at 10 places, the highest pyrosphere position still is in actual water surface below, its temperature T
bChange not obviously, the trend of slow rising is arranged, with saturated water temperature T
cBetween difference remain unchanged substantially or trace occurs and rise; Saturated water temperature measuring point is put its temperature T below still being in the water surface than deep-seated
cRemain unchanged, this moment, processes temperature signal circuit 2 connection alarms 3 gave the alarm, and the prompting water level is on the low side, intakes automatically by feed pump 4, and alarm automatically terminates after moisturizing is finished.
When water level was lower than the highest pyrosphere position 10, temperature sensor 1A and temperature sensor 1B all were positioned at more than the actual water surface, temperature T
aAnd T
bSharply rise in the capital, with saturated water temperature T
cBetween difference DELTA T
AcWith Δ T
BcWill sharply increase; Temperature sensor 1C still is positioned at below the water surface, its temperature T
cRemain unchanged, this moment, processes temperature signal circuit 2 connection alarms 3 gave the alarm, and the prompting accident conditions locks feed pump 4 simultaneously and forbids moisturizing, and alarm must manually be removed.
When operating pressure departed from rated operating pressure in the boiler furnace 5, said system was because with the saturation water temperature T
cLive signal still can normally play a protective role as reference, has effectively avoided wrong report and has failed to report the body explosion accident of having avoided vertical boiler to cause because of overtemperature.
Claims (2)
1. vertical boiler overtemperature protection device; temperature sensor signal output connects the processes temperature signal circuit; the output of processes temperature signal circuit connects alarm, water pump; it is characterized in that described temperature sensor has three; first temperature sensor is welded on the impact tube wall concordant with lowest safe waterline; second temperature sensor is welded on the flue wall of the highest pyrosphere position, and the 3rd temperature sensor is inserted in the saturation water of bottom of furnace body.
2. vertical boiler overtemperature protection device according to claim 1 is characterized in that the 3rd temperature sensor location is in the saturation water away from water inlet, sewage draining exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200563728U CN202032557U (en) | 2011-03-04 | 2011-03-04 | Overtemperature protection device for vertical boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200563728U CN202032557U (en) | 2011-03-04 | 2011-03-04 | Overtemperature protection device for vertical boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202032557U true CN202032557U (en) | 2011-11-09 |
Family
ID=44894853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200563728U Expired - Lifetime CN202032557U (en) | 2011-03-04 | 2011-03-04 | Overtemperature protection device for vertical boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202032557U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287633A (en) * | 2016-10-24 | 2017-01-04 | 佛山吉宝信息科技有限公司 | A kind of very fast go out steam steam generator |
| CN108613160A (en) * | 2018-04-28 | 2018-10-02 | 广东美的厨房电器制造有限公司 | Steam generating system and its scale detection method |
| CN109431252A (en) * | 2018-10-23 | 2019-03-08 | 杭州老板电器股份有限公司 | Water shortage detection method, device and the intelligent appliance of intelligent appliance |
| CN109838778A (en) * | 2017-11-29 | 2019-06-04 | 宁波方太厨具有限公司 | A kind of adaptive water feeding method of steam generator |
-
2011
- 2011-03-04 CN CN2011200563728U patent/CN202032557U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287633A (en) * | 2016-10-24 | 2017-01-04 | 佛山吉宝信息科技有限公司 | A kind of very fast go out steam steam generator |
| CN109838778A (en) * | 2017-11-29 | 2019-06-04 | 宁波方太厨具有限公司 | A kind of adaptive water feeding method of steam generator |
| CN109838778B (en) * | 2017-11-29 | 2021-04-16 | 宁波方太厨具有限公司 | Self-adaptive water adding method of steam generator |
| CN108613160A (en) * | 2018-04-28 | 2018-10-02 | 广东美的厨房电器制造有限公司 | Steam generating system and its scale detection method |
| CN109431252A (en) * | 2018-10-23 | 2019-03-08 | 杭州老板电器股份有限公司 | Water shortage detection method, device and the intelligent appliance of intelligent appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170630 Address after: 210000, Longjiang building, 107 grass street, Nanjing, Jiangsu Patentee after: Jiangsu Special Equipment Vessel Supervisory Institute Address before: 210000 No. 54, Longjiang District, Jiangsu, Nanjing Patentee before: Liang Guoan |
|
| CX01 | Expiry of patent term |
Granted publication date: 20111109 |
|
| CX01 | Expiry of patent term |