CN204495154U - A kind of heat exchanger tube explosive expansion joint structure - Google Patents
A kind of heat exchanger tube explosive expansion joint structure Download PDFInfo
- Publication number
- CN204495154U CN204495154U CN201520144479.6U CN201520144479U CN204495154U CN 204495154 U CN204495154 U CN 204495154U CN 201520144479 U CN201520144479 U CN 201520144479U CN 204495154 U CN204495154 U CN 204495154U
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- China
- Prior art keywords
- heat exchanger
- exchanger tube
- tube
- primacord
- expansion joint
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- Expired - Fee Related
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- 239000002360 explosive Substances 0.000 title claims abstract description 20
- 230000008719 thickening Effects 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 238000012797 qualification Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 206010000060 Abdominal distension Diseases 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 208000024330 bloating Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Abstract
The utility model discloses a kind of heat exchanger tube explosive expansion joint structure, comprise tube sheet and heat exchanger tube, formed porose in the middle part of tube sheet, heat exchanger tube inserts in the hole of tube sheet, the external diameter of heat exchanger tube is less than the aperture of tube sheet, makes to be formed with gap between the hole wall of exchanger tubes and tubesheets, wherein: be inserted with primacord in the tube chamber of heat exchanger tube, one end that primacord stretches out heat exchanger tube is connected with detonator, and the primacord part stretching into heat exchanger tube has evenly wrapped tightly thickening layer.The utility model has simple to operation, that good sealing effect, cost are low advantage.
Description
Technical field
The utility model relates to the technical field of heat exchanger tube, is specifically related to a kind of heat exchanger tube explosive expansion joint structure.
Background technology
Hot device is that modern pressure vessel uses, and the equipment be together made up of tube sheet and heat exchanger tube, heat exchanger tube interts in tube sheet, by tube sheet, heat exchanger tube and cooling medium is kept apart the effect playing cooling.In order to ensure the expanded joint of the sealing that tube sheet is connected with heat exchanger tube and tensile strength.The expanding joint method used in current industry mainly contains the expanding joint methods such as mechanical expanding, rubber tube expanding, hydraulic pressure (liquid bag) expand tube.
Paste swollen: for eliminating the slight expanded joint in gap between heat exchanger tube and pore, the pulling-out force q of expansion joint should reach 1MPa.
Rubber expanded joint, Hydraulic expansion-jointing: utilize hydraulic pressure or other external force, make the rubber media in heat exchanger tube or hydraulic medium produce pressure to tube wall, cause pipe generation plastic deformation, tube sheet creates elastic deformation, utilize the contraction of tube sheet after unloading, thus make the expanded joint of tube-to-tube sheet connection swelling.
Mechanical expanding: utilize tube expander, the expander roll of band tapering is rotated and axial feed, its peripheral uniform roller is made to do planetary motion, and radial compression inside pipe wall, while pipe is out of shape, give the stress that pipe is greater than yield point, thus cause pipe plastic deformation, pipe sheet elastic is out of shape, and makes tube-to-tube sheet connection swelling.
General use bloating plant exchange heat pipe carries out expanded joint, and effect is better, this kind of equipment be mainly applicable to tube sheet wall thinner when, and the equipment that pore internal diameter is larger.Above-mentioned expanding method is higher to equipment requirement, but not high to site requirements, does not need specific place and personnel's qualification to have certain technical ability, experience just can complete.But above-mentioned method is done for the heat exchanger tube that the thicker pore of some tube walls is very thin is just more difficult, is difficult to meet expanded joint condition.
Utility model content
Technical problem to be solved in the utility model is for the above-mentioned state of the art, and for a kind of simple to operation, heat exchanger tube explosive expansion joint structure that good sealing effect, cost are low.
The utility model solves the problems of the technologies described above adopted technical scheme:
A kind of heat exchanger tube explosive expansion joint structure, comprise tube sheet and heat exchanger tube, formed porose in the middle part of tube sheet, heat exchanger tube inserts in the hole of tube sheet, the external diameter of heat exchanger tube is less than the aperture of tube sheet, makes to be formed with gap between the hole wall of exchanger tubes and tubesheets, wherein: be inserted with primacord in the tube chamber of heat exchanger tube, one end that primacord stretches out heat exchanger tube is connected with detonator, and the primacord part stretching into heat exchanger tube has evenly wrapped tightly thickening layer.
For optimizing technique scheme, the concrete measure taked also comprises:
The material of above-mentioned thickening layer is toilet paper.
Above-mentioned primacord diameter is 6mm, and length is 400mm.
Above-mentioned primacord stretches into 270mm in heat exchanger tube.
Above-mentioned heat exchanger tube is U-shaped pipe.
Above-mentioned heat exchanger tube external diameter is about 11mm, and internal diameter is about 9mm, and the thickness of slab of tube sheet is 300mm, and aperture is about 12mm.
Above-mentioned thickening layer is positioned at the hole of tube sheet, and thickening layer is about 30mm near the distance aperture, one end in aperture.
Compared with prior art, heat exchanger tube explosive expansion joint structure of the present utility model, with explosive or primacord for the energy, allow tubing when being heated with high temperature by the method for blast, produce a certain amount of dilatancy, allow the outer wall of heat exchanger tube and tube sheet inwall combining tightly, play the effect of sealing, thus the erosion of heat transferring medium in opposing tube sheet and the leakage of HTHP.
The utility model compared with prior art has the following advantages:
1, structure is simple, reasonable in design: the utility model selects the primacord of suitable dimension, is being equipped with thickening layer, is making the heat exchanger tube sealing property after expanded joint splendid, and meanwhile, the structure of use is very simple, easy to operate.
2, connection reliability is high: the utility model adopts the mode of explosive expansion joint, and exchanger tubes and tubesheets basic unit expanded joint connects, and ensure that working strength and the sealing property of heat exchanger tube sheet and heat exchanger tube.
3, cost is low, is convenient to promote the use of.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Figure 1 shows that structural representation of the present utility model.
Reference numeral is wherein: tube sheet 1, thickening layer 2, gap 3, heat exchanger tube 4, primacord 5, detonator 6.
A kind of heat exchanger tube explosive expansion joint structure of the present utility model, comprise tube sheet 1 and heat exchanger tube 4, formed porose in the middle part of tube sheet 1, heat exchanger tube 4 inserts in the hole of tube sheet 1, the external diameter of heat exchanger tube 4 is less than the aperture of tube sheet 1, makes to be formed with gap 3 between the hole wall of heat exchanger tube 4 and tube sheet 1, wherein: be inserted with primacord 5 in the tube chamber of heat exchanger tube 4, one end that primacord 5 stretches out heat exchanger tube 4 is connected with detonator 6, and primacord 5 part stretching into heat exchanger tube 4 has evenly wrapped tightly thickening layer 2.
In embodiment, the material of thickening layer 2 is toilet paper.
In embodiment, primacord 5 diameter is 6mm, and length is 400mm.
In embodiment, primacord 5 stretches into 270mm in heat exchanger tube 4.
In embodiment, heat exchanger tube 4 is U-shaped pipe.
In embodiment, heat exchanger tube 4 external diameter is about 11mm, and internal diameter is about 9mm, and the thickness of slab of tube sheet 1 is 300mm, and aperture is about 12mm.
In embodiment, thickening layer 2 is positioned at the hole of tube sheet 1, and thickening layer 2 is about 30mm near the distance aperture, one end in aperture.
Below by way of specific experiment, structure and parameters origin of the present utility model is set forth:
Experimentation:
Structure of the present utility model is different with existing expanded-connecting apparatus.The utility model heat exchanger tube external diameter is at about 11mm, and internal diameter is at about 9mm, and the thickness of slab 300mm of heat exchange tube sheet, aperture is at 12mm, and a U-shaped heat exchanger tube equipment pore is symmetrical with the straight line crossing central point on tube sheet.During beginning we have selected 10 with the long heat exchanger tube of 300mm respectively primacord that is thick with 4mm, 5mm, 6mm, 7mm, length 400mm pierce into the length of about 270mm in pipe, carry out ignition at end detonator to make it to blast, thus it is thicker to allow pipe carry out certain expansion, the size of the external diameter and internal diameter of then measuring pipe finds that the size of the external diameter-extension of pipe is also not quite similar, the det-cord of final 6mm meets the expansion requirements required for us most by the size that the external diameter of pipe extends, and can ensure expanded joint effect.But we find the irregular deformation in various degree that all pipes all occur, still need so follow-up to continue test, allow pipe avoid this problem.Follow-up we by having wrapped up in the outside of det-cord the thickness that one deck toilet paper increases primacord, thus can facilitate in Inserting Tube, according to tightness, we have determined 4 kinds of different thickness specifications and have carried out continuation test, find outside toilet paper wrap up in tightly and thicker time, after pipe blast be there will not be diastrophic, only can along axis and vertical axis distortion.
From test data and the scheme of above-mentioned summary, we determine to carry out the procedure qualification of expanded joint, select a thicker tube sheet and 5 single u-shaped heat exchanger tubes, totally 10 mouths of pipe need expanded joint, select 2 explosive expansion joints according to test plan, one time 5, symmetrical is distinguished into one group.Expanded joint is complete, after the assay was approved, carry out pulling-out force test, then sample is dissected, observe the quality condition in expanded joint region, comprise expanded joint region and non-expanded joint region transfers place and whether there is the defect such as crackle, cut, tube outer wall and tubesheet holes whether good in conjunction with situation, whether the size of expanded joint meets the demands, with or without excessivelys swollen, deficient swollen phenomenon, heat exchanger tube wall thickness reduction whether within claimed range, the experiments of sealing performance etc. of expanded joint.
After explosive expansion joint procedure qualification is qualified, in the tube sheet of Mini-type heat exchanger, put on method that heat exchanger tube welds in outside the local welded seal of heat exchanger tube and pipe bridge.Equipment is transported to place of exploding accordingly, then preprepared primacord is reinforced level and smooth comprehensively the wrapping up of paper, the length of end paper is approximately the distance that 30mm is reserved at tube plate thickness two ends.Generally cap sensitive is reinstated at 7 ~ 12 pipes one after primacord inserts, can to symmetrical region explosive expansion joint at twice in theory, because same U pipe cannot ignite two ends simultaneously, mainly in order to the shredded paper be vented and burn, prevent cramming, be difficult to remove.Then expanded joint inspection is carried out, qualified.
Below be only preferred embodiment of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, not departing from the some improvements and modifications under the utility model principle prerequisite, protection domain of the present utility model should be considered as.
Claims (7)
1. a heat exchanger tube explosive expansion joint structure, comprise tube sheet (1) and heat exchanger tube (4), described tube sheet (1) middle part is formed porose, described heat exchanger tube (4) inserts in the hole of tube sheet (1), the external diameter of heat exchanger tube (4) is less than the aperture of tube sheet (1), make to be formed with gap (3) between the hole wall of heat exchanger tube (4) and tube sheet (1), it is characterized in that: in the tube chamber of described heat exchanger tube (4), be inserted with primacord (5), one end that described primacord (5) stretches out heat exchanger tube (4) is connected with detonator (6), primacord (5) part stretching into heat exchanger tube (4) has evenly wrapped tightly thickening layer (2).
2. a kind of heat exchanger tube explosive expansion joint structure according to claim 1, is characterized in that: the material of described thickening layer (2) is toilet paper.
3. a kind of heat exchanger tube explosive expansion joint structure according to claim 2, is characterized in that: described primacord (5) diameter is 6mm, and length is 400mm.
4. a kind of heat exchanger tube explosive expansion joint structure according to claim 3, is characterized in that: described primacord (5) stretches into heat exchanger tube (4) interior 270mm.
5. a kind of heat exchanger tube explosive expansion joint structure according to claim 4, is characterized in that: described heat exchanger tube (4) is U-shaped pipe.
6. a kind of heat exchanger tube explosive expansion joint structure according to claim 5, it is characterized in that: described heat exchanger tube (4) external diameter is about 11mm, and internal diameter is about 9mm, the thickness of slab of tube sheet (1) is 300mm, and aperture is about 12mm.
7. a kind of heat exchanger tube explosive expansion joint structure according to claim 6, is characterized in that: described thickening layer (2) is positioned at the hole of tube sheet (1), and thickening layer (2) is about 30mm near the distance aperture, one end in aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144479.6U CN204495154U (en) | 2015-03-13 | 2015-03-13 | A kind of heat exchanger tube explosive expansion joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144479.6U CN204495154U (en) | 2015-03-13 | 2015-03-13 | A kind of heat exchanger tube explosive expansion joint structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204495154U true CN204495154U (en) | 2015-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520144479.6U Expired - Fee Related CN204495154U (en) | 2015-03-13 | 2015-03-13 | A kind of heat exchanger tube explosive expansion joint structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN204495154U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170731A (en) * | 2019-04-30 | 2019-08-27 | 中国人民解放军陆军工程大学 | Synchronous more titanium tube of thin wall of explosive welding and steel pipe plate hole clad tubesheet and method |
-
2015
- 2015-03-13 CN CN201520144479.6U patent/CN204495154U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170731A (en) * | 2019-04-30 | 2019-08-27 | 中国人民解放军陆军工程大学 | Synchronous more titanium tube of thin wall of explosive welding and steel pipe plate hole clad tubesheet and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |