Combined-type powdered coal pipeline compensation device

Abstract

The invention discloses a combined-type powdered coal pipeline compensation device, which consists of a centered sleeve type expansion joint and two corrugated expansion joints, wherein the two corrugated expansion joints are respectively and coaxially connected at both ends and are equal in caliber. Axial through holes are respectively and evenly distributed in radial annular plates respectively at both ends of each corrugated pipe; a sphere seat is arranged in each axial through hole; one double-thread screw is connected in series and axially and tightly spliced with the two sphere seats respectively at both ends of each corresponding corrugated pipe to form a hinge joint structure; the axial movement of each corrugated pipe is limited by the corresponding hinge joint structure, and the lateral displacement of a powdered coal pipeline is only assorted with flexible absorption of the corrugated expansion joints. Right ends of outer pipes of the two corrugated expansion joints are coaxially connected with a ring stand; rollers which are adjustable in radial position are evenly distributed on the right end face of the ring stand; and the rollers axially roll along outer walls of inner pipes to form an external guide structure. In order to further improve the quality of the axial displacement of the inner pipes, screw bolt assemblies connected in the radial direction are evenly distributed on ring pipe walls of the left ends of the inner pipes to form an internal guide structure. The combined-type powdered coal pipeline compensation device disclosed by the invention is clear in division of axial compensation and lateral compensation, flexible in compensation, high in compensation dosage and good in sealing effect.

Description

technical field [0001] The invention relates to a pipeline compensation device. Specifically, the invention relates to a combined pulverized coal pipeline compensation device. The device is composed of two different types of compensators and belongs to the technical field of pipeline safety devices. Background technique [0002] Large-scale coal-fired thermal power plants have large boiler capacity, high furnace body, and large thermal expansion in three directions, so the thermal displacement of the supporting pipes is also relatively large, and a matching pulverized coal pipeline compensator is required to effectively absorb the boiler burner interface. and the thermal displacement of the pulverized coal pipeline without excessive stress, and it is also convenient for installation, construction and operation and maintenance. At present, in order to solve the above problems, the industry has developed a three-dimensional compensator with a combined structure, that is, two s...

AI Technical Summary

Problems solved by technology

In addition, the distance between the two guide rollers is relatively short. For a pipe with a slightly larger diameter, its long diameter is relatively small, and it cannot play the role of axial guidance.

[0005] Third, the sealing packing of the sleeve compensator matched with the compensator is sealed by bolts and nuts tightening the pressure head. When the sealing packing wears out, the pressure head becomes loose, and the roller structure welded on the pressure head also loses its effectiveness.

[0006] Fourth, when this type of compensator itself compensates for movement, the radial stiffness is only 1 / 5 to 1 / 20 of the axial stiffness. When radial compensation is applied, it will be skewed once it is stressed, resulting in the inner cylinder of the telescopic sleeve compensator Partial wear with the outer sleeve

Images