CN219198504U - Equal-inner-diameter wear-resistant expansion joint - Google Patents
Equal-inner-diameter wear-resistant expansion joint Download PDFInfo
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- CN219198504U CN219198504U CN202223539432.9U CN202223539432U CN219198504U CN 219198504 U CN219198504 U CN 219198504U CN 202223539432 U CN202223539432 U CN 202223539432U CN 219198504 U CN219198504 U CN 219198504U
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- connecting pipe
- expansion joint
- equal
- diameter wear
- resistant expansion
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Abstract
The utility model relates to an equal-inner-diameter wear-resistant expansion joint, which comprises a left connecting pipe, a corrugated pipe and a right connecting pipe, wherein two ends of the corrugated pipe are respectively welded and fixed with the left connecting pipe and the right connecting pipe; a gap is left between the first annular face and the second annular face of the overlap region. According to the utility model, the expansion joint is not provided with the honeycomb duct, the inner diameters of the expansion joint are completely equal, the inner diameters of the pipelines are equal to the inner diameters of the expansion joint when the expansion joint is installed and used, the expansion joint can not block the running medium in the pipelines, and the transportation efficiency of the pipelines is improved; meanwhile, the ceramic fibers are filled in the corrugated pipe, so that hard media such as coal dust can be effectively prevented from entering the expansion joint, the expansion joint is more wear-resistant, and the service life of the expansion joint is greatly prolonged.
Description
Technical Field
The utility model relates to the technical field of expansion joints, in particular to an equal-inner-diameter wear-resistant expansion joint.
Background
Existing coal-fired boilers generally need to install and use pulverized coal expansion joints in pipelines. The pulverized coal expansion joint is generally provided with a spherical expansion joint and a corrugated sleeve expansion joint, the expansion joint can perform radial angular displacement and axial linear displacement, the deflection angle and the axial displacement are large, the larger displacement generated during operation of equipment such as a boiler can be effectively compensated and absorbed, the use effect is good, and the application is wide.
At present, the structure of the corrugated sleeve expansion joint generally comprises a corrugated pipe, a flow guide pipe and left and right connecting pipes, wherein two ends of the corrugated pipe are welded and fixed with the left connecting pipe and the right connecting pipe respectively, the inner wall of the left connecting pipe is welded and fixed with the left end of the flow guide pipe, and the right end of the flow guide pipe extends into an inner cavity of the right connecting pipe. In the use process of the pipeline, the inner diameter of the guide pipe is smaller than the inner diameters of the left connecting pipe and the right connecting pipe, so that a medium running in the pipeline generates resistance when encountering the guide pipe, and the transportation efficiency of the pipeline is affected. For hard media such as coal powder particles, coal powder enters the expansion joint in the use process, the coal powder can grind moving parts of the expansion joint, and the expansion joint is easy to leak after three to five years of use, so that the expansion joint needs to be maintained or replaced, the service life of the expansion joint is short, the maintenance and replacement workload is large, and the use cost is high.
Disclosure of Invention
The utility model aims to provide an equal-inner-diameter expansion joint, which is not provided with a flow guide pipe, the inner diameter of a pipeline is completely equal to that of the expansion joint, the expansion joint can not produce a blocking effect on a medium running in the pipeline, the transportation efficiency of the pipeline is improved, and meanwhile, the expansion joint is more wear-resistant, so that the service life of the expansion joint is prolonged.
The aim of the utility model is realized by adopting the following technical scheme:
the utility model provides an equal internal diameter wear-resisting expansion joint, includes left takeover, bellows and right takeover, the both ends of bellows respectively with left takeover and right takeover welded fastening, the right-hand member of left takeover is equipped with the first annular face of thickness attenuation, and the left end of right takeover is equipped with the second annular face of thickness attenuation, first annular face and second annular face coincide each other and form takeover overlap area, the thickness of overlap area is less than or equal to the wall thickness of left takeover or right takeover.
As a preferred embodiment of the present utility model, the wall thicknesses of the left connecting tube and the right connecting tube are equal, and the thickness of the overlapping area is equal to the wall thickness of the left connecting tube or the right connecting tube.
As a preferred embodiment of the present utility model, a gap is left between the first annular surface and the second annular surface of the overlapping region.
As a preferable embodiment of the present utility model, the width of the gap is 0.1 mm or less.
As a preferable technical scheme of the utility model, two ends of the corrugated pipe are welded and fixed with the outer surfaces of the left connecting pipe and the right connecting pipe respectively through backing rings.
As a preferable technical scheme of the utility model, the packing is filled between the inner surface of the corrugated pipe and the outer surfaces of the left connecting pipe and the right connecting pipe.
As a preferred embodiment of the present utility model, the filler is ceramic fiber.
As the preferable technical scheme of the utility model, the outer circumferences of the left connecting pipe and the right connecting pipe are respectively sleeved with movable flanges; the left end of the left connecting pipe is welded and fixed with the left welding ring; the right end of the right connecting pipe is welded and fixed with the right welding ring.
As the preferable technical scheme of the utility model, the outer circumferences of the left connecting pipe and the right connecting pipe movable flange are respectively provided with an ear plate, and the two ear plates are connected through a screw rod and a nut component.
As a preferable technical scheme of the utility model, the outer side surface of the movable flange is provided with a welding ring concave surface.
The utility model has the beneficial effects that: compared with the prior art, the expansion joint is not provided with the guide pipe, the inner diameters of the expansion joint are completely equal, the inner diameter of the pipeline is equal to the inner diameter of the expansion joint when the expansion joint is installed and used, the expansion joint can not block the running medium in the pipeline, and the transportation efficiency of the pipeline is improved; meanwhile, the ceramic fibers are filled in the corrugated pipe, so that hard media such as coal dust can be effectively prevented from entering the expansion joint, the expansion joint is more wear-resistant, and the service life of the expansion joint is greatly prolonged.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is an enlarged partial schematic view at a in fig. 1.
In the figure: 1. left welding ring, 2, movable flange, 3, left take over, 4, bellows, 5, packing, 6, backing ring, 7, otic placode, 8, screw rod and nut subassembly, 9, right take over, 10, right welding ring, 31, first annular face, 91, second annular face.
Detailed Description
The utility model is further described with reference to the drawings and the specific embodiments below:
as shown in fig. 1 and fig. 2, an equal-inner-diameter wear-resistant expansion joint comprises a left connecting pipe 3, a corrugated pipe 4 and a right connecting pipe 9, wherein two ends of the corrugated pipe 4 are welded and fixed with the left connecting pipe 3 and the right connecting pipe 9 respectively, the right end of the left connecting pipe 3 is provided with a first annular surface 31 with a thinned thickness, the left end of the right connecting pipe 9 is provided with a second annular surface 91 with a thinned thickness, the first annular surface 31 and the second annular surface 91 are mutually overlapped to form a connecting pipe overlapping area, and the thickness of the overlapping area is smaller than or equal to the wall thickness of the left connecting pipe 3 or the right connecting pipe 9.
In this embodiment, the wall thicknesses of the left connecting pipe 3 and the right connecting pipe 9 are equal, and the thickness of the overlapping area of the connecting pipes is equal to the wall thickness of the left connecting pipe 3 or the right connecting pipe 9. And a gap of 0.1 mm or less is left between the first annular surface 31 and the second annular surface 91 of the overlap region.
Two ends of the corrugated pipe 4 are welded and fixed with the outer surfaces of the left connecting pipe 3 and the right connecting pipe 9 through backing rings 6 respectively, and a filler 5 is filled between the inner surface of the corrugated pipe 4 and the outer surfaces of the left connecting pipe 3 and the right connecting pipe 9, and the filler 5 is ceramic fiber in the embodiment.
The outer circumferences of the left connecting pipe 3 and the right connecting pipe 9 are respectively sleeved with a movable flange 2; the outer side surface of the movable flange 2 is provided with a welding ring concave surface. The left end of the left connecting pipe 3 is welded and fixed with the left welding ring 1; the right end of the right connecting pipe 9 is welded and fixed with the right welding ring 10. The outer circumferences of the movable flanges 2 of the left connecting pipe 3 and the right connecting pipe 9 are respectively provided with an ear plate 7, and the two ear plates 7 are connected through a screw rod and a nut component 8.
The above examples are only for illustrating the concept and technical features of the present utility model, and are intended to enable those skilled in the art to understand the technical scheme and embodiments of the present utility model, and thus, the scope of the present utility model is not limited thereto. All equivalent substitutions or equivalent changes according to the technical proposal of the utility model are covered in the protection scope of the utility model.
Claims (10)
1. The utility model provides an equal internal diameter wear-resisting expansion joint, includes left takeover, bellows and right takeover, the both ends of bellows respectively with left takeover and right takeover welded fastening, characterized by: the left end of the left connecting pipe is provided with a first annular surface with reduced thickness, the left end of the right connecting pipe is provided with a second annular surface with reduced thickness, the first annular surface and the second annular surface are mutually overlapped to form a connecting pipe overlapping area, and the thickness of the overlapping area is smaller than or equal to the wall thickness of the left connecting pipe or the right connecting pipe.
2. The equal-inner-diameter wear-resistant expansion joint according to claim 1, wherein: the wall thickness of the left connecting pipe is equal to that of the right connecting pipe, and the thickness of the overlapped area is equal to that of the left connecting pipe or the right connecting pipe.
3. The equal-inner-diameter wear-resistant expansion joint according to claim 2, wherein: a gap is reserved between the first annular surface and the second annular surface of the overlapping region.
4. A constant diameter wear resistant expansion joint as claimed in claim 3, wherein: the width of the gap is less than or equal to 0.1 millimeter.
5. The equal-inner-diameter wear-resistant expansion joint according to any one of claims 1 to 4, characterized in that: and two ends of the corrugated pipe are welded and fixed with the outer surfaces of the left connecting pipe and the right connecting pipe respectively through backing rings.
6. The equal-diameter wear-resistant expansion joint according to claim 5, wherein: and a filler is filled between the inner surface of the corrugated pipe and the outer surfaces of the left connecting pipe and the right connecting pipe.
7. The equal-inner-diameter wear-resistant expansion joint according to claim 6, wherein: the filler is ceramic fiber.
8. The equal-diameter wear-resistant expansion joint according to claim 5, wherein: the outer circumferences of the left connecting pipe and the right connecting pipe are respectively sleeved with movable flanges; the left end of the left connecting pipe is welded and fixed with the left welding ring; the right end of the right connecting pipe is welded and fixed with the right welding ring.
9. The equal-inner-diameter wear-resistant expansion joint according to claim 8, wherein: the outer circumferences of the left connecting pipe and the right connecting pipe movable flange are respectively provided with an ear plate, and the two ear plates are connected through a screw rod and a nut component.
10. The equal-inner-diameter wear-resistant expansion joint according to claim 8, wherein: and a welding ring concave surface is arranged on the outer side surface of the movable flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223539432.9U CN219198504U (en) | 2022-12-29 | 2022-12-29 | Equal-inner-diameter wear-resistant expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223539432.9U CN219198504U (en) | 2022-12-29 | 2022-12-29 | Equal-inner-diameter wear-resistant expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219198504U true CN219198504U (en) | 2023-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223539432.9U Active CN219198504U (en) | 2022-12-29 | 2022-12-29 | Equal-inner-diameter wear-resistant expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219198504U (en) |
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2022
- 2022-12-29 CN CN202223539432.9U patent/CN219198504U/en active Active
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