CN202730145U - Rectangular gas elbow pipe with vibration-reducing guide plates - Google Patents
Rectangular gas elbow pipe with vibration-reducing guide plates Download PDFInfo
- Publication number
- CN202730145U CN202730145U CN 201220268857 CN201220268857U CN202730145U CN 202730145 U CN202730145 U CN 202730145U CN 201220268857 CN201220268857 CN 201220268857 CN 201220268857 U CN201220268857 U CN 201220268857U CN 202730145 U CN202730145 U CN 202730145U
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- gas
- guide plates
- rectangular
- elbow pipe
- vibration
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Abstract
The utility model relates to the field of blast furnace top gas pressure recovery devices, in particular to a rectangular gas elbow pipe. The utility model discloses the rectangular gas elbow pipe with vibration-reducing guide plates. Two guide plates are arranged in the rectangular gas elbow pipe; the two guide plates are arranged in parallel along the flow direction of gas; and the two guide plates are respectively provided with balance holes. According to the rectangular gas elbow pipe with the vibration-reducing guide plates, the two guide plates are respectively provided with the gas guide balance holes, thus, the structural intrinsic frequency of the rectangular elbow pipe is changed, i.e. the difference between an eddy ripple frequency in the rectangular elbow pipe and the structural intrinsic frequency of the rectangular elbow pipe is enlarged, so that resonance cannot be easily caused. The gas balance of three chambers which form the guide plates in the rectangular elbow pipe is improved, the impact forces of eddy ripples to the pipelines and the guide plates are reduced, and the safe operation of the unit is effectively ensured.
Description
Technical field
The utility model relates to top gas pressure recovery device field, relates in particular to a kind of rectangle gas bend pipe.
Background technology
Top gas pressure recovery device TRT (Top Gas Pressure Recovery Turbine) is comprised of equipment such as turbine, generator, initiators.The general design load of the pressure of top gas is at 150 ~ 250kPa, and the TRT retrieving arrangement is the gas pressure importing turbine expansion acting with blast furnace roof, and motor-torgue generator, is converted to the device of electric energy by generator.In order to realize the turbine maximizing efficiency, under equal working condition, generally always effectively improve in design the pressure reduction of turbine import and export gas pressure.Flow deflector is the component that turbine is connected with gas main, has to reduce the drag effect that air-flow passes through, and accelerates the expansion of gas, to realize the turbine maximizing efficiency.Mainly there is following problem in this structure:
The first, rectangular bend connects turbine and gas main, and pipeline is undergone mutation, and easily forms air whirl in rectangular bend;
The second, the eddy current ripple frequency in the rectangular bend is close with the rectangular bend structural natural frequencies, easily causes resonance, causes pipeline high vibration and flow deflector to be torn.
In order to address the above problem, common treatment process is to pipe strengthening in the prior art, such as thickening pipe conveying fluid wall thickness, increases pipeline support point etc.Aforesaid method more relatively easily, still can't use aforesaid method to solve for the heavy caliber gas line and with the turbine junction for more small-bore pipeline.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of rectangle gas bend pipe with reducing the vibration flow deflector, by offer the structural natural frequencies that equalizing port has changed rectangular bend at flow deflector, be difficult for causing resonance, reduced the surging force of eddy current pulsation to pipeline and flow deflector.
The utility model is achieved in that a kind of rectangle gas bend pipe with reducing the vibration flow deflector, is provided with two flow deflectors in this rectangle gas bend pipe, and two flow deflectors be arranged in parallel along gas flow, offer equalizing port on the described flow deflector.
Offer respectively 1 ~ 5 equalizing port on the described every flow deflector.
Offer respectively three equalizing ports on the described every flow deflector, three equalizing ports become equilateral triangle to arrange.
Offer respectively five equalizing ports on the described every flow deflector, five equalizing port across are arranged.
The utility model is with the characteristics of the rectangle gas bend pipe that reduces the vibration flow deflector according to easy formation air whirl pulsation in the rectangular bend, offer the gas flow guiding equalizing port at flow deflector, changed the structural natural frequencies of rectangular bend, that is to say the eddy current ripple frequency and the difference of rectangular bend structural natural frequencies that have widened in the rectangular bend, be difficult for causing and resonate; Improve the gaseous equilibrium of 3 chambers that formed by flow deflector in the rectangular bend, reduced the surging force of eddy current pulsation to pipeline and flow deflector; Through the practical application in the lower cylinder of TRT turbine power generation unit and rectangular bend of improved flow deflector, flow deflector and rectangular bend vibration values obviously reduce, cylinder and rectangular bend flange connections under the unit, vibration amplitude are in 16 μ m to 24 μ m for a long time, have effectively guaranteed the safe operation of unit.
Description of drawings
Fig. 1 is that the utility model is with the rectangle gas bend pipe structure schematic diagram that reduces the vibration flow deflector;
Fig. 2 is the schematic diagram of flow deflector among the embodiment 1;
Fig. 3 is the schematic diagram of flow deflector among the embodiment 2.
Among the figure: cylinder under 1 flow deflector, 2 equalizing ports, 3 gas lines, 4 turbines.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only are used for explanation the utility model and are not used in the scope of the present utility model that limits.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model statement, these equivalent form of values fall within the application's appended claims limited range equally.
As shown in Figure 1, a kind of rectangle gas bend pipe with reducing the vibration flow deflector is provided with 1, two flow deflector of two flow deflectors 1 and be arranged in parallel along gas flow in this rectangle gas bend pipe, two flow deflectors 1 are separated into three chambers with rectangle gas bend pipe, offer equalizing port 2 on the described flow deflector 1.In the utility model, offer respectively 1 ~ 5 equalizing port 2 on the described every flow deflector 1.At first determine the position that needs perforate during perforate, then use the method perforate of gas cutting.
During installation, rectangle gas bend pipe one end connects gas line 3, the other end connects cylinder 4 under the turbine, this moment is when 3 chambers that the coal gas air-flow passes through to be comprised of two flow deflectors 1 in the rectangular bend again, under the effect that is distributed in the equalizing port 2 on the flow deflector 1, gaseous tension in the pipeline reaches balance, reduced at a high speed, the high pressure gas motion is to the surging force of flow deflector 1 and pipeline, the resonance that produces when making coal gas by flow deflector 1 reduces, thereby reduced the high vibration of flow deflector 1 and rectangular bend, make vibration control in normal range, effectively guaranteed the safe operation of unit.
As shown in Figure 2, in the present embodiment, in order under the prerequisite that does not affect pressure cycling efficient, to obtain the effect of best reduction vibration, offer respectively 2 one-tenth equilateral triangles of 2, three equalizing ports of three equalizing ports on the described every flow deflector 1 and arrange.
As shown in Figure 3, a kind of rectangle gas bend pipe with reducing the vibration flow deflector, the difference of embodiment 2 and embodiment 1 is, offers respectively 2, five equalizing port 2 across of five equalizing ports on the described every flow deflector 1 and arranges.
Claims (4)
1. one kind with the rectangle gas bend pipe that reduces the vibration flow deflector, be provided with two flow deflectors (1) in this rectangle gas bend pipe, two flow deflectors (1) be arranged in parallel along gas flow, it is characterized in that: offer equalizing port (2) on the described flow deflector (1).
2. the rectangle gas bend pipe with reducing the vibration flow deflector as claimed in claim 1 is characterized in that: offer respectively 1 ~ 5 equalizing port (2) on the described every flow deflector (1).
3. the rectangle gas bend pipe with reducing the vibration flow deflector as claimed in claim 2 is characterized in that: offer respectively three equalizing ports (2) on the described every flow deflector (1), the arrangement of three equalizing ports (2) one-tenth equilateral triangle.
4. the rectangle gas bend pipe with reducing the vibration flow deflector as claimed in claim 2 is characterized in that: offer respectively five equalizing ports (2) on the described every flow deflector (1), the arrangement of five equalizing ports (2) across.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268857 CN202730145U (en) | 2012-06-08 | 2012-06-08 | Rectangular gas elbow pipe with vibration-reducing guide plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268857 CN202730145U (en) | 2012-06-08 | 2012-06-08 | Rectangular gas elbow pipe with vibration-reducing guide plates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202730145U true CN202730145U (en) | 2013-02-13 |
Family
ID=47655862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220268857 Expired - Fee Related CN202730145U (en) | 2012-06-08 | 2012-06-08 | Rectangular gas elbow pipe with vibration-reducing guide plates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202730145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019292A (en) * | 2016-11-04 | 2018-05-11 | 北京航空航天大学 | A kind of oscillation damping method for nozzles with injector guide rib |
-
2012
- 2012-06-08 CN CN 201220268857 patent/CN202730145U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019292A (en) * | 2016-11-04 | 2018-05-11 | 北京航空航天大学 | A kind of oscillation damping method for nozzles with injector guide rib |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20160608 |