Environment-friendly corrugated expansion joint
A corrugated expansion joint, an environmentally friendly technology, applied in expansion compensation devices for pipelines, flange connections, pipes/pipe joints/fittings, etc., can solve the problem of weakening elastic compensation capabilities, reduced sealing performance at joints, and bellows overload, etc. problem, achieve the effect of reducing vibration deformation, saving replacement cost and increasing service life
Active Publication Date: 2019-11-05
江苏晨鑫波纹管有限公司
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Problems solved by technology
[0004] In order to make up for the shortcomings of the existing technology, some pipe networks in the project are limited by the position or space at the nodes where the corrugated expansion joints are arranged, so that the length of the corrugated expansion joints Limited, the preferred goal of the deformation design for this purpose is to reduce the length of the bellows. The bellows expansion joint with this structure does not reach the standard length because the length of the built-in bellows does not reach the standard length, resulting in a reduction in the compensation margin, and the bellows are prone to overload during actual operation. On the other hand, the length of the bellows in the corrugated expansion joint is shortened, which weakens the elastic compensation ability, directly weakens the clamping force at the joint between the corrugated expansion joint and the connecting pipe, and easily causes the problem of a decrease in the sealing performance of the joint. The present invention An environmentally friendly corrugated expansion joint proposed
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[0021] As an embodiment of the present invention, the end of the middle cylinder 2 close to the No. 3 flange 5 is provided with a cylinder 8, and a piston 9 is slidably connected to the cylinder 8, and the side of the piston 9 away from the bottom of the cylinder 8 is fixedly connected. There is a piston rod 10; the piston 9 has a limited flow hole 11; the cylinder 8 is filled with hydraulic oil; the end of the piston rod 10 outside the cylinder 8 runs through the third flange 5, the third flange 5 The piston rod 10 on the side away from the outer bellows 1 is covered with a spring 12, and the piston rod 10 on the side away from the third flange 5 is threaded with a nut 13; when the expansion joint is located at the source or end of the pipeline 7, due to mechanical Vibration or pressure shock will cause the expansion joint to vibrate continuously, making the outer bellows 1 and the inner bellows 4 deform continuously, affecting the service life. At this time, the piston rod 10...
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The invention belongs to the technical field of pipeline connection, and particularly relates to an environment-friendly corrugated expansion joint which comprises an outer corrugated pipe. A middle cylinder is sleeved with the outer corrugated pipe, and the outer diameter of the middle cylinder is smaller than the inner diameter of the outer corrugated pipe; one end of the outer corrugated pipe is fixedly connected with a first flange, and the other end of the outer corrugated pipe is fixedly connected with one end of the middle cylinder; an inner corrugated pipe is sleeved with the middle cylinder, and the outer diameter of the inner corrugated pipe is smaller than the inner diameter of the middle cylinder; the other end of the middle cylinder is fixedly connected with the inner corrugated pipe, and the other end of the inner corrugated pipe is fixedly connected with a third flange; a second flange is fixedly connected to one side, far away from the inner corrugated pipe, of the third flange through a bolt; a second flange is fixedly connected to one side, far away from the outer corrugated pipe, of the first flange through a bolt; and pipelines are welded on the second flanges.The cross sections of the outer corrugated pipe, the middle cylinder and the inner corrugated pipe are arranged in a zigzag manner, so that larger deformation can be realized in a limited expansion joint installation space, it is guaranteed that the corrugated pipes have enough compensation allowance, and the failure of the corrugated pipes in the expansion joint due to overload is reduced.
Description
technical field [0001] The invention belongs to the technical field of pipeline connection, in particular to an environment-friendly corrugated expansion joint. Background technique [0002] Expansion joints are also customarily called compensators, or expansion joints. It consists of a bellows (an elastic element) that constitutes its main body and accessories such as end pipes, brackets, flanges, and conduits. The expansion joint is a flexible structure arranged on the container shell or pipeline in order to compensate the additional stress caused by temperature difference and mechanical vibration. Utilize the effective expansion and contraction deformation of the bellows of its working body to absorb the dimensional changes of pipelines, conduits, containers, etc. caused by thermal expansion and contraction, or compensate the axial, lateral and angular displacement of pipelines, conduits, containers, etc. It can also be used for noise reduction, vibration reduction, and...
Claims
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IPC IPC(8): F16L51/03F16L23/16F16L23/18F16L55/027
CPCF16L51/035F16L51/025F16L51/026F16L23/165F16L23/18F16L55/02709
Inventor陈浩然刘法亭张庆云
Owner江苏晨鑫波纹管有限公司