CN103994707A - Method for measuring relative thermal expansion elongation amount of air preheater heat exchange tube - Google Patents
Method for measuring relative thermal expansion elongation amount of air preheater heat exchange tube Download PDFInfo
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- CN103994707A CN103994707A CN201410202208.1A CN201410202208A CN103994707A CN 103994707 A CN103994707 A CN 103994707A CN 201410202208 A CN201410202208 A CN 201410202208A CN 103994707 A CN103994707 A CN 103994707A
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- heat exchanger
- exchanger tube
- vernier
- ruler
- air preheater
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Abstract
The result, calculated through a current theoretical calculation method, of the thermal expansion elongation of an air preheater heat exchange tube is inaccurate relative to the thermal expansion elongation amount of an upper tube plate, and according to the main reasons, data of metal wire expansion coefficients for calculating the thermal expansion elongation amount are very few, in the calculation process, only one or two approximate metal wire expansion coefficients can be used for performing statistic and calculation, and the calculated result is inaccurate. The invention provides a measuring method. The measuring method comprises the steps of manufacturing a set of measuring tools and auxiliary pieces, wherein the measuring tools are composed of a straight ruler, a vernier and an arc-shaped plate spring, and the auxiliary pieces are top rings of the head of the heat exchange tube; mounting the measuring tools and the auxiliary pieces on the designated position of the air preheater before the products are delivered out of the factory; opening an upper smoke box in the shutdown maintenance period of the production line to read the data. According to the method, the real relative heat expansion of the real heat exchange tube can be measured, the real and reliable data can be utilized for designing a corrugated expansion joint, design waste can be avoided, and design faults can be avoided.
Description
Technical field
The present invention relates to carbon black production equipment, especially air preheater.
Background technology
Under air preheater heat exchanging segment working temperature, heat exchanger tube heat expansion is upwards extended, be fixed on the upper perforated plate of housing upper end, follow housing heat expansion also to top offset, if can accurately grasp the relative heat expansion elongation of heat exchanger tube at upper perforated plate, very important to correct design heat exchanger tube floating seal-expansion bellow, because there be more than 100 expansion bellow on an air preheater, the material technology of expansion bellow is special, price is very expensive, its price is substantially proportional with the amount of displacement of expansion bellow, displacement selects large, can cause waste, displacement is little, and serviceable life is influenced, the result that current theoretical calculation method calculates is very inaccurate, main cause is, heat exchanger tube and the housing of air preheater are made up of multiple material, the data of the expansion coefficients of metal wire that is used for calculating heat expansion elongation is few, can only be with one when calculating, the calculation of uniting of two kind of approaching expansion coefficients of metal wire, the real situation of result distance of calculating does not know to have much gaps, can not apply as true and reliable data, in the time of " design " expansion bellow displacement, for safety, would rather stay some displacements more.
Summary of the invention
In order to overcome the above-mentioned difficulties of air preheater, the present invention proposes a kind of measuring method, and one is in air preheater inside under working environment, and the method for actual measurement heat exchanger tube heat expansion elongation, to obtain the relative heat expansion elongation of real heat exchanger tube data.
The present invention solves the measuring method that its technical matters adopts: the measuring method of the relative heat expansion elongation of air preheater heat exchanger tube, and measuring method is divided three steps:
The first step: make a set of survey instrument and auxiliary member.Fig. 1～Fig. 6 is installation relation and the part shape schematic diagram of survey instrument and auxiliary member, and survey instrument is by ruler (1), and vernier (2) and arc-shaped leaf spring (3) form; Auxiliary member is heat exchanger tube crown ring (4); It is characterized in that: on ruler, have scale, the gathering sill that has vernier to move on ruler; On vernier, there is the arrow that points to ruler scale, in vernier, have arc-shaped leaf spring; The elastic force of arc-shaped leaf spring makes vernier on ruler, no matter move to that position, can stably stop at that position; Its feature also has: heat exchanger tube crown ring is installed the top that is welded on heat exchanger tube, heat exchanger tube heat expansion during to top offset heat exchanger tube crown ring promote vernier and move up, heat exchanger tube shrinkage during to bottom offset heat exchanger tube crown ring and then heat exchanger tube to bottom offset, leave vernier.
Second step: survey instrument and auxiliary member are installed to air preheater assigned address: before air preheater assembling is dispatched from the factory, 1. an optional heat exchanger tube (5), heat exchanger tube crown ring is installed and is welded on to the top of heat exchanger tube, 2. ruler is stood on upper perforated plate (6), allow a side of ruler tape guide groove come on upper perforated plate pore sleeve (7) face of cylinder, adjust ruler direction, make the manhole direction of the graduated plane of ruler towards upper smoke box, ruler is vertically welded on upper perforated plate; 3. arc-shaped leaf spring is installed in vernier, installing on ruler with the vernier of arc-shaped leaf spring, vernier is moved down, allow vernier lower plane be attached to the upper plane of heat exchanger tube crown ring; 4. record the scale value on the ruler of vernier upward arrow indication, this scale value is the original scale value of not working before heating up of the relative upper perforated plate of heat exchanger tube.
The 3rd step: after the work of production line normal boot-strap; during meeting shutdown maintenance; open the manhole cover (R) of upper smoke box; the new scale value of observed and recorded vernier upward arrow indication; this scale value is deducted to the last length value of original scale value; be exactly under the air preheater heat exchanger tube working temperature of this model, real heat expansion elongation relatively.
The invention has the beneficial effects as follows, can record the relative heat expansion elongation of real heat exchanger tube by this method, utilize true and reliable data to carry out expansion bellow design, can avoid design waste, also can avoid design error.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the embodiment of the present invention and structural representation.
Fig. 2 is Fig. 1 " I " partial enlarged drawing.
Fig. 3 is Fig. 2 " II " partial enlarged drawing.
Fig. 4 is that Fig. 2 " A " is to view.
Fig. 5 is Fig. 4 " B-B " broken section enlarged drawing.
Fig. 6 is Fig. 5 " C-C " cut-open view.
In Fig. 1 to Fig. 6,1 ruler, 2 verniers, 3 arc-shaped leaf springs, 4 heat exchanger tube crown rings, 5 heat exchanger tubes, 6 upper perforated plates, 7 upper perforated plate pore sleeves, 8 expansion bellows, 9 air preheater heat exchanging segments, 10 upper smoke box, K is the welding position on heat exchanger tube crown ring and heat exchanger tube top, R is the manhole cover of upper smoke box.
Embodiment
In Fig. 1～Fig. 6, ruler 1, vernier 2, arc-shaped leaf spring 3 and heat exchanger tube crown ring 4 all should adopt the heat-resistance stainless steel material adapting with working temperature to make; Arrow on scale on ruler and numeral and vernier all should adopt impression method to make, and avoids with not seeing Chu after japanning method high temperature ablation; The rigidity of arc-shaped leaf spring 3 should reach below and require: no matter at high temperature or under normal temperature, vernier moves to that position, just should be stable be parked in that position.
Claims (1)
1. the measuring method of the relative heat expansion elongation of air preheater heat exchanger tube, measuring method is divided three steps:
The first step: make a set of survey instrument and auxiliary member.Fig. 1～Fig. 6 is installation relation and the part shape schematic diagram of survey instrument and auxiliary member, and survey instrument is by ruler (1), and vernier (2) and arc-shaped leaf spring (3) form; Auxiliary member is heat exchanger tube crown ring (4); It is characterized in that: on ruler, have scale, the gathering sill that has vernier to move on ruler, has the arrow that points to ruler scale on vernier; In vernier, have arc-shaped leaf spring, the elastic force of arc-shaped leaf spring makes vernier on ruler, no matter move to that position, can stably stop at that position; Its feature also has: heat exchanger tube crown ring is installed the top that is welded on heat exchanger tube, heat exchanger tube heat expansion during to top offset heat exchanger tube crown ring promote vernier and move up, heat exchanger tube shrinkage during to bottom offset heat exchanger tube crown ring and then heat exchanger tube to bottom offset, leave vernier.
Second step: survey instrument and auxiliary member are installed to air preheater assigned address: before air preheater assembling is dispatched from the factory, 1. an optional heat exchanger tube (5), heat exchanger tube crown ring is installed and is welded on to the top of heat exchanger tube, 2. ruler is stood on upper perforated plate (6), there is a side of gathering sill to come on upper perforated plate pore sleeve (7) face of cylinder on ruler, adjust ruler direction, make the manhole direction of the graduated plane of ruler towards upper smoke box, ruler is vertically welded on upper perforated plate; 3. arc-shaped leaf spring is installed in vernier, installing on ruler with the vernier of arc-shaped leaf spring, vernier is moved down, allow vernier lower plane be attached to the upper plane of heat exchanger tube crown ring; 4. record the scale value on vernier arrow indication ruler, this scale value is the original scale value of not working before heating up of the relative upper perforated plate of heat exchanger tube.
The 3rd step: after the work of production line normal boot-strap; during meeting shutdown maintenance; open the manhole cover (chi) of upper smoke box; the new scale value of observed and recorded vernier upward arrow indication; this scale value is deducted to the last length value of original scale value; be exactly under the air preheater heat exchanger tube working temperature of this model, real heat expansion elongation relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202208.1A CN103994707A (en) | 2014-05-09 | 2014-05-09 | Method for measuring relative thermal expansion elongation amount of air preheater heat exchange tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202208.1A CN103994707A (en) | 2014-05-09 | 2014-05-09 | Method for measuring relative thermal expansion elongation amount of air preheater heat exchange tube |
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| CN103994707A true CN103994707A (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410202208.1A Pending CN103994707A (en) | 2014-05-09 | 2014-05-09 | Method for measuring relative thermal expansion elongation amount of air preheater heat exchange tube |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092120A (en) * | 2015-07-30 | 2015-11-25 | 青岛德固特节能装备股份有限公司 | Heat exchange tube thermal expansion mobile resistance simulation measuring apparatus and method |
| CN109489563A (en) * | 2018-12-27 | 2019-03-19 | 常州工学院 | A kind of bellows orientation adjustment displacement detector and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201697584U (en) * | 2010-04-02 | 2011-01-05 | 浙江长兴裕丰精密机械有限公司 | Caliper improving structure |
| CN202032994U (en) * | 2011-04-25 | 2011-11-09 | 江苏兴邦建工集团有限公司 | Device for measuring working deformation of shock isolating supporting seat |
| CN102288086A (en) * | 2011-08-10 | 2011-12-21 | 中国北车集团大连机车车辆有限公司 | Indirect elongation method for making fastening screw accurate |
| CN202393721U (en) * | 2011-12-06 | 2012-08-22 | 中南大学 | Thermal deformation tester for cement-emulsified asphalt mortar material |
| CN202974227U (en) * | 2012-10-29 | 2013-06-05 | 郭健 | Multichannel full-automatic concrete contraction dilatometer |
-
2014
- 2014-05-09 CN CN201410202208.1A patent/CN103994707A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201697584U (en) * | 2010-04-02 | 2011-01-05 | 浙江长兴裕丰精密机械有限公司 | Caliper improving structure |
| CN202032994U (en) * | 2011-04-25 | 2011-11-09 | 江苏兴邦建工集团有限公司 | Device for measuring working deformation of shock isolating supporting seat |
| CN102288086A (en) * | 2011-08-10 | 2011-12-21 | 中国北车集团大连机车车辆有限公司 | Indirect elongation method for making fastening screw accurate |
| CN202393721U (en) * | 2011-12-06 | 2012-08-22 | 中南大学 | Thermal deformation tester for cement-emulsified asphalt mortar material |
| CN202974227U (en) * | 2012-10-29 | 2013-06-05 | 郭健 | Multichannel full-automatic concrete contraction dilatometer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092120A (en) * | 2015-07-30 | 2015-11-25 | 青岛德固特节能装备股份有限公司 | Heat exchange tube thermal expansion mobile resistance simulation measuring apparatus and method |
| CN109489563A (en) * | 2018-12-27 | 2019-03-19 | 常州工学院 | A kind of bellows orientation adjustment displacement detector and method |
| CN109489563B (en) * | 2018-12-27 | 2020-12-01 | 常州工学院 | Corrugated pipe orientation adjustment displacement detection device and method |
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Application publication date: 20140820 |
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