CN201925658U - Pressure balanced expansion joint with rectangular bent pipe - Google Patents
Pressure balanced expansion joint with rectangular bent pipe Download PDFInfo
- Publication number
- CN201925658U CN201925658U CN2011200502283U CN201120050228U CN201925658U CN 201925658 U CN201925658 U CN 201925658U CN 2011200502283 U CN2011200502283 U CN 2011200502283U CN 201120050228 U CN201120050228 U CN 201120050228U CN 201925658 U CN201925658 U CN 201925658U
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- expansion joint
- side plate
- curved tube
- elbow side
- involute
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Abstract
A pressure balanced expansion joint with a rectangular bent pipe is used for solving the problems of vibration during operation and over-standard noise of expansion joints at outlets of turbines. The technical scheme includes that the pressure balanced expansion joint comprises a corrugated pipe and the bent pipe connected with the same, reinforcing components realizing point-mode support are arranged on bent side plates on two sides of the bent pipe and distributed on multi-rows of curves after the expansion joint is improved. Since the reinforcing components which are in point-mode support and distributed according to the involute are added on the bent side plates which are capable of vibrating during operation of the expansion joint, the bent side plates which are integral larger planes originally are reduced or divided into a plurality of plane units, the natural vibration frequency of the bent side plates is changed, the difference between the natural frequency of a TRT (top-pressure recovery turbine) and that of the bent pipe is increased, vibration and noise of a system of the TRT during running are reduced, and safety in operation of the pressure balanced expansion joint with the rectangular bent pipe is improved greatly.
Description
Technical field
The utility model relates to the effective rectangle curved tube pressure-balancing type expansion joint of a kind of expansion joint, particularly anti-vibration, belongs to the pipe fitting technical field.
Background technique
In smelting iron and steel technology, storing in the modern blast furnace furnace roof has a large amount of coal gas, and its pressure can produce a large amount of potential energy up to 0.15-0.25Mpa.Utilize blast furnace furnace roof waste heat, blast furnace gas imported the turbine engine work done, drive generator and finish energy recovery, be called for short TRT(Blast Furnace Top Gas Recovery Turbine Unit, blast-furnace top gas recovery turbine generator) device.TRT uses the differential pressure generating, so topmost factor is to import and export differential pressure, the high more generating of pressure difference is good more.The turbine engine outlet adopts expansion joint as pressure, temperature compensation means.The turbine engine outlet is a rectangular configuration, and the expansion joint that outlet is adopted is a rectangle curved tube pressure-balancing type expansion joint.An elbow side plate is respectively arranged about the curved tube curved tube, and for deadweight and the installing space that reduces expansion joint, described elbow side plate adopts thin-walled part.Because elbow side plate area is big, wall thickness, the pressure surge of TRT outlet in addition brings problems such as vibrations in service are serious, noise exceeds standard can for the rectangle curved tube of expansion joint, and these problems can cause potential safety hazard to the operation of TRT turbine engine.
The model utility content
The utility model is used to solve the defective of above-mentioned prior art and provides a kind of under the condition that does not increase elbow side plate wall thickness, effectively reduces the rectangle curved tube pressure-balancing type expansion joint of vibrations and noise.
The alleged problem of the utility model is solved by following technological scheme:
A kind of rectangle curved tube pressure-balancing type expansion joint, it comprises bellows and the curved tube that is connected with bellows, its specialization is: the elbow side plate of described curved tube both sides is provided with the strong assembly that point type supports, and strong assembly is distributed on a few row's curves.
Above-mentioned rectangle curved tube pressure-balancing type expansion joint, described strong assembly distribution curve is an involute, and the base circle diameter (BCD) of each bar involute increases with the radius of elbow side plate, and the starting point of each involute is positioned at the elbow side plate place of curved tube entry end.
Above-mentioned rectangle curved tube pressure-balancing type expansion joint, the involute base circle diameter (BCD) of described contiguous elbow side plate inboard is elbow side plate inner arc diameter+300-400 millimeter, the base circle diameter (BCD) difference of adjacent two involutes is the 300-400 millimeter.
Above-mentioned rectangle curved tube pressure-balancing type expansion joint, described each strong assembly is by strong post and strengthen pad and form, wherein strong post pass the elbow side plate and with its seam, the outer plate surface seam of described reinforcement pad and elbow side plate.
Above-mentioned rectangle curved tube pressure-balancing type expansion joint, described each strong component characteristic spacing that is positioned on same the involute is the 400-600 millimeter.
The utility model is serious at TRT device turbine engine outlet rectangle curved tube pressure-balancing type expansion joint operation vibrations, the noise problem of exceeding standard is improved, the key link of the generation vibrations when described expansion joint is worked---the elbow side plate is set up the point type support, press the strong assembly that involute distributes, make the elbow side plate by a plane that integral body is bigger, contract and become or be divided into several planes, unit, thereby changed the intrinsic vibration frequency of elbow side plate, it is poor to have strengthened with TRT device turbine engine natural frequency, realized effect, improved the safe mass of rectangle curved tube pressure-balancing type expansion joint operation greatly the operation damping noise reduction of TRT device turbine engine system.The utility model has obviously reduced the left and right elbow side plate distortion of curved tube and has reduced vibrations and noise on the basis that does not increase elbow side plate wall thickness dimension, and it is unobstructed that the involute distribution form of strong assembly helps gas flow, promotes TRT device generating efficiency.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is strong modular construction schematic representation.
Each label is expressed as follows in the accompanying drawing: 1. bellows; 2. guide shell; 3. curved tube; 4. elbow side plate; 5. strong post; 6. reinforcement pad; 7. strong assembly distribution curve; 7-1. the involute of contiguous elbow side plate inboard; 8. curved tube entry end, 9. curved tube outlet end.
Embodiment
Referring to Fig. 1, Fig. 2, the utility model is used for the rectangle outlet port of TRT device, and its formation comprises bellows 1 and curved tube 3, is provided with guide shell 2 in the bellows, and bellows is connected with curved tube, and the bi-side of curved tube are two blocks of elbow side plates 4.The elbow side plate is fan-shaped, and its area is very big, and wall thickness is very thin.The utility model is provided with strong assembly on two elbow side plates 4, strong assembly is distributed on several the curves 7.Because the frequent about 10 times/h of TRT device turbine engine export pressure surge, and the amplitude of fluctuation bring problems such as vibrations in service are serious, noise exceeds standard can for thus the rectangle curved tube, particularly elbow side plate of expansion joint greatly between 0.1-0.3Mpa.Set up strong assembly on the elbow side plate, make the elbow side plate by a plane that integral body is bigger, contracting becomes or is divided into several planes, unit.Thereby changed the intrinsic vibration frequency of elbow side plate, it is poor to have strengthened with TRT device turbine engine natural frequency, has realized the effect to the operation damping noise reduction of TRT device turbine engine system, has improved the safe mass of rectangle curved tube pressure-balancing type expansion joint operation greatly.Described strong assembly distribution curve 7 is an involute, and the base circle diameter (BCD) of each bar involute increases with the radius of elbow side plate 4, and the starting point of each bar involute is positioned at the elbow side plate place of curved tube entry end 8, and each involute ends at the outlet end 9 of curved tube.Wherein the base circle diameter (BCD) of the involute 7-1 of contiguous elbow side plate inboard is elbow side plate inner arc diameter+300-400 millimeter, the base circle diameter (BCD) difference of adjacent two involutes is the 300-400 millimeter, and each the strong component characteristic spacing that is positioned on same the involute is the 400-600 millimeter.Strong assembly is distributed on the involute, according to the characteristic that the involute radius of curvature increases gradually, can guarantee the smooth smoothness of medium in the expansion joint, reduces the media flow resistance and reduces the resistance that brings because of media flow, pressure surge thereby reach.
Referring to Fig. 3, each strong assembly is by strong post 5 and strengthen pad 6 and forms, wherein strong post pass elbow side plate 4 and with its seam, strengthen pad and be positioned at outside the elbow side plate, strong post is strengthened the outer plate surface seam of pad and strong post and elbow side plate by passing in the hole of strengthening pad.
Provide a specific embodiment: the inside diameter of curved tube 3 is 800mm, and outside diameter is that the width of its elbow side plate 4 of 2400mm is 1600mm.According to the intrinsic vibration frequency situation of rectangle curved tube pressure-balancing type expansion joint, determine three involutes that on the elbow side plate, distribute, the base circle diameter (BCD) that generates these three involutes is respectively 1200 mm, 1600 mm, 2000 mm, and the curve spacing of strong assembly is 500 mm on each bar involute.
Claims (5)
1. rectangle curved tube pressure-balancing type expansion joint, it comprises bellows (1) and the curved tube that is connected with bellows (3), it is characterized in that: the elbow side plate (4) of described curved tube (3) both sides is provided with the strong assembly that point type supports, and strong assembly is distributed on a few row's curves (7).
2. rectangle curved tube pressure-balancing type expansion joint according to claim 1, it is characterized in that: described curve (7) is an involute, the base circle diameter (BCD) of each bar involute increases with the radius of elbow side plate (4), and the starting point of each involute is positioned at the elbow side plate place of curved tube entry end (8).
3. rectangle curved tube pressure-balancing type expansion joint according to claim 2, it is characterized in that: involute (7-1) base circle diameter (BCD) of described contiguous elbow side plate inboard is elbow side plate inner arc diameter+300-400 millimeter, and the base circle diameter (BCD) difference of adjacent two involutes is the 300-400 millimeter.
4. according to claim 1 or 2 or 3 described rectangle curved tube pressure-balancing type expansion joints, it is characterized in that: described each strong assembly is made up of strong post (5) and reinforcement pad (6), wherein strong post pass the elbow side plate and with its seam, the outer plate surface seam of described reinforcement pad and elbow side plate.
5. rectangle curved tube pressure-balancing type expansion joint according to claim 4 is characterized in that: described each strong component characteristic spacing that is positioned on same the involute is the 400-600 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200502283U CN201925658U (en) | 2011-02-28 | 2011-02-28 | Pressure balanced expansion joint with rectangular bent pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200502283U CN201925658U (en) | 2011-02-28 | 2011-02-28 | Pressure balanced expansion joint with rectangular bent pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201925658U true CN201925658U (en) | 2011-08-10 |
Family
ID=44429505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200502283U Expired - Lifetime CN201925658U (en) | 2011-02-28 | 2011-02-28 | Pressure balanced expansion joint with rectangular bent pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201925658U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095043A (en) * | 2011-02-28 | 2011-06-15 | 秦皇岛北方管业有限公司 | Rectangular knee pipe pressure balance type expansion joint |
-
2011
- 2011-02-28 CN CN2011200502283U patent/CN201925658U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095043A (en) * | 2011-02-28 | 2011-06-15 | 秦皇岛北方管业有限公司 | Rectangular knee pipe pressure balance type expansion joint |
| CN102095043B (en) * | 2011-02-28 | 2012-08-22 | 秦皇岛北方管业有限公司 | Rectangular knee pipe pressure balance type expansion joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110810 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |