CN208138689U - A kind of heat exchangers for district heating and its effective plug that exchanges heat - Google Patents
A kind of heat exchangers for district heating and its effective plug that exchanges heat Download PDFInfo
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- CN208138689U CN208138689U CN201820506534.5U CN201820506534U CN208138689U CN 208138689 U CN208138689 U CN 208138689U CN 201820506534 U CN201820506534 U CN 201820506534U CN 208138689 U CN208138689 U CN 208138689U
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- heat exchange
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 24
- 230000004323 axial length Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 11
- 230000009172 bursting Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
The utility model discloses a kind of effective plug of heat exchange, and the plug is set to tube end, and welds with pipe wall of heat exchange pipe, to block heat exchanger tube；The plug is internally provided at least one plug hole.When expanded by heating occurs in the plug and pipe wall of heat exchange pipe welding process in the utility model, since it is internally provided with plug hole, the direction in plug towards its internal plug hole is expanded, to reduce the risk for bursting heat exchanger tube when it is expanded outward.Meanwhile by the way that the plug hole is arranged, the welding stress in plug and heat exchanger tube welding process can be discharged.Therefore, when plug in the utility model makes the heat exchangers for district heating of heat supply period in running order, the risk that tube end, especially welding angle position are cracked can be substantially reduced, to reduce the risk of heat exchanger tube leakage, improves the working performance of heat exchangers for district heating.In addition, a kind of heat exchangers for district heating is also disclosed in the utility model.
Description
Technical field
The utility model relates to Designing Parts of Heat-exchanger technical field, in particular to heat exchangers for district heating and its heat exchange is effective stifled
Head.
Background technique
Thermal Power Station's thermal power plant unit by heat exchangers for district heating to factory and resident's heat supply, changing inside the heat exchangers for district heating
Heat pipe is mainly used for the high temperature and high pressure steam in power plant being converted to high-temperature-hot-water.The heat exchangers for district heating is only in work in heat supply period
Make state, and stop working in non-heating period, in standby state is stopped, in this state, heat exchanger tube is easy to happen corrosion and incrustation
The phenomenon that, so as to cause it is in running order when heat exchangers for district heating internal leakage.
About 15 meters of the heat exchanger tube length of heat exchangers for district heating or more, and be U-shaped curved structural traps in tube sheet, when individual heat exchange
When device pipe leaks, to avoid integral replacing heat exchangers for district heating, needs to block the both ends of the U-tube using the method for welding, keep away
Exempt from high-temperature water and directly contacted with steam, to avoid leaking.
Under normal conditions, it is generally bonded and welds with pipe wall of heat exchange pipe using solid cylinder plug, to realize heat exchanger tube
Closure.But due to the relatively thin (≤2mm of pipe wall of heat exchange pipe), in plug welding process, plug is easy to happen thermal expansion,
And since the plug rigidity is larger, leads to expansion outward of being heated in its welding process, there is the risk for bursting pipe wall of heat exchange pipe,
Meanwhile welding stress when the two welding is larger, and the heat supply network heat exchanger is caused to weld in the process of running in heat exchanger tube and plug
Place cracks, to leak.
In view of this, how to provide a kind of effective plug of heat exchange, the rigidity of the plug is smaller, so as to reduce it and change
Welding stress when heat pipe welds, and the risk of pipe wall of heat exchange pipe rupture is reduced, it is those skilled in the art's skill urgently to be resolved
Art problem.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of effective plug of heat exchange, the plug is set
It is welded in tube end, and with pipe wall of heat exchange pipe, to block heat exchanger tube；
The plug is internally provided at least one plug hole.
When expanded by heating occurs in the plug and pipe wall of heat exchange pipe welding process in the utility model, due to its internal setting
There is plug hole, the direction in plug towards its internal plug hole is expanded, is changed to reduce and be burst when it is expanded outward
The risk of heat pipe.Meanwhile by the way that the plug hole is arranged, the welding stress in plug and heat exchanger tube welding process can be discharged.Cause
This can substantially reduce heat exchanger tube when plug in the utility model makes the heat exchangers for district heating of heat supply period in running order
The risk that end, especially welding angle position are cracked improves the work of heat exchangers for district heating to reduce the risk of heat exchanger tube leakage
Make performance.
Optionally, the plug hole is along the axially extending of the plug.
Optionally, the number in the plug hole is one, and is set on the axis of the plug.
Optionally, the section in the plug hole is taper.
Optionally, the plug along it is axial include first segment and second segment, the first segment protrudes into heat exchanger tube, and with change
Thermotube wall fitting, the second segment are located at outside heat exchanger tube, and the periphery wall of pipe wall of heat exchange pipe and the second segment welds.
Optionally, the axial length of the first segment is greater than the axial length of the second segment.
Optionally, the plug hole is the blind hole for being opened in the second segment, and the first segment is solid construction.
Optionally, along the direction of heat exchanger tube ecto-entad, the diameter of the plug is gradually reduced, so that the plug is cut
Face is taper.
In addition, the utility model also provides a kind of heat exchangers for district heating, including several heat exchanger tubes, several heat exchanger tubes pass through
Plug blocks, and the plug is the above-described effective plug of heat exchange.
Detailed description of the invention
Fig. 1 provides the structural schematic diagram of effective plug in a specific embodiment that exchanges heat to be described in the utility model.
In Fig. 1：
1 first segment, 2 second segments, 3 plug holes.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution of the utility model, with reference to the accompanying drawing and have
The utility model is described in further detail for body embodiment.
Attached drawing 1 is please referred to, Fig. 1 provides the knot of effective plug in a specific embodiment that exchanges heat to be described in the utility model
Structure schematic diagram.
In a specific embodiment, the utility model provides a kind of effective plug of heat exchange, as shown in Figure 1, the plug is set
In tube end, welded for blocking heat exchanger tube, and with pipe wall of heat exchange pipe, meanwhile, which is internally provided at least one
Plug hole 3.
When expanded by heating occurs in the plug and pipe wall of heat exchange pipe welding process in the utility model, due to being set inside plug
It is equipped with plug hole 3, the direction in plug towards its internal plug hole 3 is expanded, to reduce support when it is expanded outward
The risk of broken heat exchanger tube.Meanwhile by the way that the plug hole 3 is arranged, plug can be discharged and answered with the welding in heat exchanger tube welding process
Power.Therefore, when the plug in the utility model makes the heat exchangers for district heating of heat supply period in running order, it can substantially reduce and change
The risk that heat pipe end, especially welding angle position are cracked improves heat exchangers for district heating to reduce the risk of heat exchanger tube leakage
Working performance.
Specifically, as shown in Figure 1, the plug hole 3 is along the axially extending of plug, so that having on the outside of the plug complete
Circumferential wall, to improve the reliability connected between plug and heat exchanger tube, it is often more important that, guarantee that plug can be blocked and be changed
Heat pipe, so that heat exchanger tube be avoided to leak.
More specifically, the plug is provided with a plug hole 3, and the plug hole 3 is set in embodiment as shown in Figure 1
On the axis of plug, i.e., the periphery wall of the plug is equal with the distance between plug hole 3 everywhere.
It is appreciated that, in order to reduce the rigidity of plug, 3, the plug hole number in the plug can be one in the utility model
A or multiple, for example, plug can be set, there are two the plug holes axially extending along plug, and the axis of the two is parallel.But this reality
It applies in example, a plug hole 3, which is arranged, can be realized the purpose that plug rigidity is reduced in the utility model, and the plug hole 3 is arranged
When on the axis of plug, after plug is heated, periphery is roughly the same to the degree of 3 internal expansion of plug hole everywhere, so that changing
Opposing force between heat pipe and plug is also roughly the same, to reduce the excessive risk of heat exchanger tube local stress.In addition, should
When a plug hole 3 is arranged in plug, compared with multiple plug holes are set, additionally it is possible to guarantee that plug has enough intensity, thus
Improve its service life.
Further, as shown in Figure 1, the section in the plug hole 3 is taper.
Certainly, the cross sectional shape in the plug hole 3 is not limited only to as taper, can also be other shapes commonly used in the art,
Such as cylinder, rectangle etc..In the present embodiment, the plug hole 3 of taper has the advantages that easy to process.
In the above various embodiments, as shown in Figure 1, the plug is along axial including first segment 1 and second segment 2, wherein first segment
1 protrudes into heat exchanger tube, and is bonded with pipe wall of heat exchange pipe, and second segment 2 is located at outside heat exchanger tube, and the tube wall of tube end and second
The periphery wall welding of section 2.
In the present embodiment, the first segment 1 protruded into inside heat exchanger tube with pipe wall of heat exchange pipe for being bonded, to block heat exchange
Pipe, the second segment 2 outside heat exchanger tube can be used as welding platform, realize the welding between plug and pipe wall of heat exchange pipe, from
And the welding quality between the heat exchanger tube and plug is improved, it is leaked when heat exchanger tube being further prevented to work.
Further, as shown in Figure 1, above-mentioned plug hole 3 is the blind hole for being opened in second segment 2, and first segment 1 is solid knot
Structure.
So set, above-mentioned plug hole 3 is only arranged at the second segment 2 outside heat exchanger tube, inside heat exchanger tube
First segment 1 is solid construction, to guarantee that it is bonded always with pipe wall of heat exchange pipe, to guarantee that the plug can block heat exchanger tube.
Simultaneously as the tube wall of tube end and 2 periphery wall of second segment of plug weld, and therefore, welding stress energy between the two
It is enough to be discharged by being set to the plug hole 3 inside second segment 2, and the plug hole 3 is capable of providing after plug is heated to interior expansion
Space, to reduce the risk ruptured when heat exchanger tube work.
Further, as shown in Figure 1, in the plug, the axial length of the first segment 1 inside heat exchanger tube, which is greater than, to be located at
Both the axial length of second segment 2 outside heat exchanger tube, in this way, the plug and the length that heat exchanger tube cooperates are larger, thus improve
Between connection reliability, to guarantee that plug can block heat exchanger tube completely.
In the above various embodiments, as shown in Figure 1, the diameter of plug is gradually reduced along the direction of heat exchanger tube ecto-entad, with
Make the section taper of the plug.
As shown in Figure 1, the diameter of first segment 1 is less than the diameter of second segment 2, and first segment 1 is taper, therefore, when this
When protruding into heat exchanger tube for one section 1, the first segment 1 of tapered cross-section can play the role of guiding, stretch to help to realize plug
Enter in heat exchanger tube and is bonded with pipe wall of heat exchange pipe, meanwhile, when which is tapered cross-section, additionally it is possible to which process is protruded into reduction
The risk that middle plug bursts pipe wall of heat exchange pipe.
In addition, in embodiment as shown in Figure 1, the diameter in above-mentioned plug hole 3 be should not be too large or too small.For example, in Fig. 1,
The diameter of 2 end face of plug second segment (plug right end in Fig. 1) be 16mm, 1 end face of first segment (plug left end in Fig. 1) it is straight
Diameter is 15mm, and between both ends of the surface plug section gradual change so that the plug section is tapered, and 1 end of plug first segment
The diameter in face is slightly less than or is equal to heat exchanger tube diameter, and the diameter of 2 end face of second segment is greater than heat exchanger tube diameter.
Meanwhile the diameter for being opened in the plug hole 3 of second segment 2 is 1-5mm, much smaller than the diameter of 2 end face of plug second segment,
And the plug hole 3 is taper.In addition, protruding into heat exchanger tube to guarantee the connection reliability between plug and heat exchanger tube
One section 1 of length is greater than the length for the second segment 2 being located at outside heat exchanger tube, and specifically, the length of first segment 1 is 40mm, and second
The length of section 2 is 20mm.
Certainly, the size of above-mentioned plug each section is only an example, and when concrete application, the size of plug can be as needed
Setting, therefore, in the utility model, is not construed as limiting the size of plug each section.
In addition, the utility model also provides a kind of heat exchangers for district heating, including several heat exchanger tubes, wherein several heat exchanger tubes are logical
Plug closure is crossed, and the plug is any of the above plug as described in the examples.
Since the plug has above-mentioned technique effect, the heat exchangers for district heating including the plug should also have corresponding technology to imitate
Fruit, details are not described herein again.
Detailed Jie has been carried out to a kind of heat supply network heat exchanger provided by the utility model and its effective plug of heat exchange above
It continues.Specific case used herein is expounded the principles of the present invention and embodiment, and above embodiments are said
The bright method and its core concept for being merely used to help understand the utility model.It should be pointed out that for the common of the art
For technical staff, without departing from the principle of this utility model, can also to the utility model carry out it is several improvement and
Modification, modifications and modifications also fall within the protection scope of the claims of the utility model.
Claims (9)
1. a kind of effective plug of heat exchange, which is characterized in that the plug is set to tube end, and welds with pipe wall of heat exchange pipe,
To block heat exchanger tube；
The plug is internally provided at least one plug hole (3).
2. the effective plug of heat exchange according to claim 1, which is characterized in that axis of the plug hole (3) along the plug
To extension.
3. the effective plug of heat exchange according to claim 2, which is characterized in that the number of the plug hole (3) is one, and
On the axis of the plug.
4. the effective plug of heat exchange according to claim 3, which is characterized in that the section of the plug hole (3) is taper.
5. the effective plug of heat exchange described in any one of -4 according to claim 1, which is characterized in that the plug includes along axial direction
First segment (1) and second segment (2), the first segment (1) is protruded into heat exchanger tube, and is bonded with pipe wall of heat exchange pipe, the second segment
(2) it is located at outside heat exchanger tube, and the periphery wall of pipe wall of heat exchange pipe and the second segment (2) welds.
6. the effective plug of heat exchange according to claim 5, which is characterized in that the axial length of the first segment (1) is greater than
The axial length of the second segment (2).
7. the effective plug of heat exchange according to claim 5, which is characterized in that the plug hole (3) is to be opened in described the
The blind hole of two sections (2), the first segment (1) are solid construction.
8. plug according to claim 5, which is characterized in that along the direction of heat exchanger tube ecto-entad, the plug it is straight
Diameter is gradually reduced, so that the section of the plug is taper.
9. a kind of heat exchangers for district heating, including several heat exchanger tubes, which is characterized in that several heat exchanger tubes are blocked by plug, institute
Stating plug is the effective plug of heat exchange of any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820506534.5U CN208138689U (en) | 2018-04-10 | 2018-04-10 | A kind of heat exchangers for district heating and its effective plug that exchanges heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820506534.5U CN208138689U (en) | 2018-04-10 | 2018-04-10 | A kind of heat exchangers for district heating and its effective plug that exchanges heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208138689U true CN208138689U (en) | 2018-11-23 |
Family
ID=64292754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820506534.5U Active CN208138689U (en) | 2018-04-10 | 2018-04-10 | A kind of heat exchangers for district heating and its effective plug that exchanges heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208138689U (en) |
-
2018
- 2018-04-10 CN CN201820506534.5U patent/CN208138689U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 2096, Beijing New Energy Technology Research Institute Patentee after: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION Co.,Ltd. Address before: No. 2096, Beijing New Energy Technology Research Institute Patentee before: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION CENTER Address after: No. 2096, Beijing New Energy Technology Research Institute Patentee after: Guoneng boiler and Pressure Vessel Inspection Co.,Ltd. Address before: No. 2096, Beijing New Energy Technology Research Institute Patentee before: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION Co.,Ltd. |