CN212338542U - Expansion joint - Google Patents
Expansion joint Download PDFInfo
- Publication number
- CN212338542U CN212338542U CN202020453133.5U CN202020453133U CN212338542U CN 212338542 U CN212338542 U CN 212338542U CN 202020453133 U CN202020453133 U CN 202020453133U CN 212338542 U CN212338542 U CN 212338542U
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- China
- Prior art keywords
- end flange
- corrugated pipe
- expansion joint
- inlet end
- flange
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Abstract
The utility model discloses an expansion joint, include: the inlet end of the corrugated pipe is fixedly connected with the inlet end flange, the outlet end of the corrugated pipe is fixedly connected with the outlet end flange, the inlet end of the guide cylinder is fixedly connected with the inlet end flange, the inlet end of the corrugated pipe is fixedly attached to the outer surface of the inlet end flange, the outlet end of the corrugated pipe is fixedly attached to the outer surface of the outlet end flange, and the inlet end of the guide cylinder is fixedly attached to the inner surface of the inlet end flange. Because the two ends of the corrugated pipe are fixedly connected with the outer surfaces of the inlet end flange and the outlet end flange respectively, the guide cylinder is fixedly connected with the inner surface of the inlet end flange, and the corrugated pipe and the guide cylinder are connected with the flanges respectively, the reserved gap between the corrugated pipe and the guide cylinder is enlarged, the friction problem between the corrugated pipe and the guide cylinder is effectively avoided, the corrugated pipe cannot crack due to abrasion, and the expansion joint is long in service life.
Description
Technical Field
The utility model relates to an engine technical field, specific theory relates to an expansion joint.
Background
As shown in fig. 1, which is a schematic cross-sectional structural view of a common expansion joint in the prior art, an inlet end of a corrugated pipe 2 and an inlet end of a guide cylinder 3 are welded together on an inlet end flange 1, an outlet end of the corrugated pipe 2 is welded on an outlet end flange 4, the outlet end of the guide cylinder 3 is a free end, and the inner diameters of the inlet end flange 1 and the outlet end flange 4 are the same. The draft tube 3 is provided with a closing structure, the closing structure is a conical surface, the conical surface gradually becomes smaller along the direction from the inlet to the outlet, and the closing structure has a throttling effect but can influence the flow guiding effect of the draft tube 3.
The expansion joint shown in fig. 1 has problems in that: the clearance between the corrugated pipe 2 and the guide shell 3 is small, and the free end of the guide shell 3 may have eccentricity, which may be an assembly problem or may be caused by abnormal radial force during operation, and when the eccentricity is too large, the guide shell 3 may contact the corrugated pipe 2 to generate abrasion, thereby causing the corrugated pipe 2 to crack.
Disclosure of Invention
To the above-mentioned not enough, the utility model discloses the technical problem that will solve is: an expansion joint with a large distance between a corrugated pipe and a guide shell is provided to prevent the corrugated pipe from cracking due to contact abrasion with the guide shell.
In order to solve the technical problem, the technical scheme of the utility model is that:
an expansion joint, comprising: bellows with locate draft tube in the bellows, the entry end and the entry end flange fixed connection of bellows, the exit end and the exit end flange fixed connection of bellows, the entry end and the entry end flange fixed connection of draft tube, the entry end of bellows fixed attached in the surface of entry end flange, the exit end of bellows fixed attached in the surface of exit end flange, the entry end of draft tube fixed attached in the internal surface of entry end flange.
Preferably, the inner surface of the outlet end flange is a tapered surface, and the tapered surface is gradually reduced along the direction from the inlet to the outlet.
Preferably, the inner surface of the outlet end flange is a straight surface.
Preferably, the guide shell is a straight shell.
Preferably, the corrugated pipe is connected with the inlet end flange and the outlet end flange in a welding mode, and the guide cylinder is connected with the inlet end flange in a welding mode.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
because the two ends of the corrugated pipe are fixedly connected with the outer surfaces of the inlet end flange and the outlet end flange respectively, the guide cylinder is fixedly connected with the inner surface of the inlet end flange, and the corrugated pipe and the guide cylinder are connected with the flanges respectively, the reserved gap between the corrugated pipe and the guide cylinder is enlarged, the friction problem between the corrugated pipe and the guide cylinder is effectively avoided, the corrugated pipe cannot crack due to abrasion, and the expansion joint is long in service life.
The inner surface of the outlet end flange is a conical surface, the conical surface gradually becomes smaller along the direction from the inlet to the outlet, the design can increase the gap between the edge of the outlet end of the guide cylinder and the outlet end flange, the guide cylinder is prevented from colliding with the outlet end flange when the expansion joint operates, and the structure of the expansion joint is optimized.
The guide shell is in a straight cylinder shape without a closing structure, fluid flows smoothly in the guide shell, and the guide effect is good.
Drawings
FIG. 1 is a schematic cross-sectional view of an expansion joint of the type commonly found in the prior art;
FIG. 2 is a schematic sectional view of a first embodiment of the expansion joint of the present invention;
FIG. 3 is an enlarged schematic view of portion A of FIG. 2;
FIG. 4 is an enlarged schematic view of the portion B of FIG. 2;
FIG. 5 is a schematic sectional view of a second embodiment of the expansion joint of the present invention;
in the figure: 1-an inlet end flange; 2-a bellows; 3-a guide shell; 4-outlet end flange.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
As shown collectively in fig. 2, 3 and 4, an expansion joint comprising: bellows 2 and draft tube 3 that is located bellows 2, bellows 2's entry end is fixed attached in the surface of entry end flange 1 through welding mode, bellows 2's exit end is fixed attached in the surface of exit end flange 4 through welding mode, draft tube 3's entry end is fixed attached in the internal surface of entry end flange 1 through welded mode, draft tube 3's exit end stretches into in exit end flange 4 for free end and exit end, the internal surface of exit end flange 4 is the conical surface, this conical surface diminishes gradually along entry to export direction.
Because bellows 2 both ends respectively with the outer fixed surface of entry end flange 1 and exit end flange 4 be connected, draft tube 3 and the internal surface fixed connection of entry end flange 1, with bellows 2 and draft tube 3 separately with flange joint to enlarged the reserve clearance between bellows 2 and the draft tube 3, effectively avoided the friction problem between bellows 2 and the draft tube 3, bellows 2 can not be because of wearing and tearing fracture, expansion joint long service life.
The inner surface of the outlet end flange 4 is a conical surface, the conical surface gradually becomes smaller along the direction from the inlet to the outlet, the design can increase the gap between the edge of the outlet end of the guide cylinder 3 and the outlet end flange 4, the free end of the guide cylinder 3 is prevented from colliding with the outlet end flange 4 when the expansion joint operates, and the structure of the expansion joint is optimized.
The guide shell 3 is in a straight tube shape without a closing structure, fluid flows smoothly in the guide shell 3, and the guide effect is good.
Example two
As shown in fig. 5, the second embodiment has a structure substantially the same as that of the first embodiment, and is different in that the inner surface of the outlet end flange 4 is a straight surface, and a large gap is reserved between the outlet end flange 4 and the free end of the guide shell 3, so that the free end of the guide shell 3 is prevented from colliding with the outlet end flange 4.
The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.
Claims (5)
1. An expansion joint, comprising: the corrugated pipe and locate draft tube in the corrugated pipe, the entry end and the entry end flange fixed connection of corrugated pipe, the exit end and the exit end flange fixed connection of corrugated pipe, the entry end and the entry end flange fixed connection of draft tube, its characterized in that, the entry end of corrugated pipe fixed attached in the surface of entry end flange, the exit end of corrugated pipe fixed attached in the surface of exit end flange, the entry end of draft tube fixed attached in the internal surface of entry end flange.
2. The expansion joint of claim 1, wherein the inner surface of the outlet end flange is tapered, the taper tapering in the direction from the inlet to the outlet.
3. The expansion joint of claim 1, wherein the inner surface of the outlet end flange is straight.
4. The expansion joint of claim 1, wherein the flow sleeve is a straight sleeve.
5. The expansion joint of claim 1, wherein said bellows is welded to said inlet end flange and said outlet end flange, and said draft tube is welded to said inlet end flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020453133.5U CN212338542U (en) | 2020-03-31 | 2020-03-31 | Expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020453133.5U CN212338542U (en) | 2020-03-31 | 2020-03-31 | Expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212338542U true CN212338542U (en) | 2021-01-12 |
Family
ID=74069113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020453133.5U Active CN212338542U (en) | 2020-03-31 | 2020-03-31 | Expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212338542U (en) |
-
2020
- 2020-03-31 CN CN202020453133.5U patent/CN212338542U/en active Active
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