Low-friction high-reliability expansion joint for pulverized coal pipeline

A low-friction, pulverized-coal pipeline technology, which is applied to expansion compensation devices, pipe components, and adjustable connections for pipelines, can solve problems affecting the safe operation of units, pipeline cracking, hanging deformation, etc., and achieve friction The effect of small force, avoiding powder leakage in the pipeline, and strong sealing

Pending Publication Date: 2021-04-13
HARBIN BOILER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the pulverized coal pipeline compensator of the existing large-capacity pulverized coal boiler is stuck or does not return to its position during operation, resulting in hanging deformation and cracking of the pipeline, which seriously affects the safe operation of the unit. Provide a low-friction and high-reliability telescopic joint for pulverized coal pipelines

Method used

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  • Low-friction high-reliability expansion joint for pulverized coal pipeline
  • Low-friction high-reliability expansion joint for pulverized coal pipeline
  • Low-friction high-reliability expansion joint for pulverized coal pipeline

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specific Embodiment approach 1

[0021] Specific implementation mode one: combine Figure 1 to Figure 3 Describe this embodiment, a low-friction high-reliability telescopic joint for pulverized coal pipelines in this embodiment, which includes an inner cylinder 1, an outer cylinder 2, a packing 3, an upper ring plate 4, a lower ring plate 5, Compression sleeve 10, stop ring 11, N first connectors 6, N guide wheels 7, N guide rails 8, N support components 9, N≥2, N is a positive integer, and the outer cylinder 2 is vertically arranged , the lower end of the inner cylinder 1 is inserted into the outer cylinder 2 from top to bottom along the axis M-M direction of the outer cylinder 2, the inner cylinder 1 and the outer cylinder 2 can slide and fit, the lower ring plate 5 is set on the outer cylinder 2, and the lower ring plate 5 and the upper end surface of the outer cylinder 2 are located at the same horizontal plane, the inner wall of the lower ring plate 5 is fixedly connected to the outer wall of the outer c...

specific Embodiment approach 2

[0022] Specific implementation mode two: combination figure 1 and figure 2 Describe this embodiment, the first connector 6 of this embodiment includes a first bolt and a first nut, the upper end surface of the upper ring plate 4 is provided with N first through holes in the form of an annular array, and the upper end surface of the lower ring plate 5 is formed in a ring. N second through holes are opened in an array, the first through holes correspond to the second through holes one by one, the upper ring plate 4 is connected with the lower ring plate 5 through the first bolts and the first nuts, and the outer circle of the upper ring plate 4 is N accommodating grooves matching the supporting components 9 are provided in a circular array. In this way, the upper ring plate 4 is detachably connected to the lower ring plate 5 through the first connecting piece 6, which is convenient for disassembly and installation; at the same time, the upper ring plate 4 is spaced apart from ...

specific Embodiment approach 3

[0023] Specific implementation mode three: combination Figure 1 to Figure 3 Describe this embodiment, each support assembly 9 of this embodiment includes a bottom plate 91, two lug plates 92 and a plurality of second connectors 93, the bottom plate 91 is horizontally arranged on the upper end surface of the lower ring plate 5, the bottom plate 91 is connected through the second The part 93 is detachably connected with the lower ring plate 5, and the two ear plates 92 are relatively arranged on the bottom plate 91 along the vertical direction. It is directly arranged between the two lugs 92, and the shaft ends on both sides of the guide wheel 7 are inserted into the shaft holes of the two lugs 92. In this way, the support assembly 9 supports the guide wheel 7, and the guide wheel 7 can effectively offset the horizontal expansion moment and reduce the sliding friction. Other compositions and connections are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a low-friction high-reliability expansion joint for a pulverized coal pipeline, and relates to the technical field of pulverized coal pipelines of high-capacity pulverized coal boilers. The problems that hanging deformation and pipeline tension fracture occur, and safe operation of a unit is seriously affected due to the fact that an existing large-capacity pulverized coal boiler pulverized coal pipeline compensator is jammed or does not return in the operation process are solved. The lower end of an inner cylinder is inserted into an outer cylinder from top to bottom in the axis direction of the outer cylinder, the inner cylinder is in sliding fit with the outer cylinder, a lower annular plate sleeves the outer cylinder, the inner wall of the lower annular plate is fixedly connected with the outer wall of the outer cylinder, N supporting assemblies are arranged on the upper end face of the lower annular plate in an annular array mode, a guide wheel is arranged on the side, close to the inner cylinder, of each supporting assembly, the outer circles of the guide wheels abut against the outer wall of the inner barrel, the upper annular plate is fixedly connected with a pressing sleeve and sleeves the inner barrel, and a packing and a baffle ring sequentially sleeve the inner barrel from top to bottom. The problem that the large-capacity pulverized coal boiler pulverized coal pipeline compensator is jammed or does not return during operation is solved.

Description

technical field [0001] The invention relates to the technical field of pulverized coal pipelines for large-capacity pulverized coal boilers (300MW to 1000MW), in particular to a low-friction and high-reliability pulverized coal pipeline used to absorb the position difference between the boiler's cold and hot state burners Expansion joint. Background technique [0002] The pulverized coal pipe of the large-capacity pulverized coal boiler is connected to the burner, and the burner expands with the boiler water wall thermally, and the vertical expansion usually reaches more than 300 mm, accompanied by a certain horizontal expansion. To absorb this three-dimensional expansion, coal A special combined three-dimensional compensator is required for the powder pipeline close to the burner section. However, due to space constraints, this compensator needs to be installed vertically in most cases, and the horizontal expansion is absorbed by two metal corrugated joints. A telescoping ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L27/12F16L51/00
CPCF16L27/12F16L51/00
Inventor 杨秀军王显山路大欣夏良伟李家鲁顾玮伦杨佰清苏殿斌姜海东王勇
Owner HARBIN BOILER
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