High-temperature-resistant rectangular expansion joint
A technology of high temperature resistance and expansion joints, which is applied in the field of pipeline safety devices, can solve the problems of poor high temperature resistance, short service life and loss of packing of bellows, and achieve the effects of improving sealing performance, improving structural strength and prolonging service life
Inactive Publication Date: 2016-10-12
JIANGSU XINFANGYUAN ELECTRIC EQUIP MFG
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Problems solved by technology
The main defect of the rectangular expansion joint in the prior art is that the filler is easily lost into the pipeline from the gap between the first rectangular inner sleeve and the second rectangular inner sleeve, the bellows has poor high temperature resistance, is easy to fail, and has a short service life
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[0015] The present invention will be further described below according to the accompanying drawings and in conjunction with the embodiments.
[0016] The high-temperature-resistant rectangular expansion joint shown in the accompanying drawings includes an end pipe 1, an intermediate connecting pipe 5, a bellows 3, and a packing 4. In this embodiment, the bellows 3 is formed by pressing more than two layers of thin-walled metal plates; the end pipe 1 It includes the first rectangular inner sleeve 1.1, the first circular outer sleeve 1.2 formed by extending the outer wall part of the first rectangular inner sleeve 1.1 radially outward and bending; the intermediate connecting pipe 5 includes the second rectangular inner sleeve 5.1, the second The two parts of the outer wall of the rectangular inner sleeve 5.1 extend radially outwards and are bent to form two second circular outer sleeves 5.2 arranged at an axial interval and facing away; 3. The straight-edge sections at both ends...
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The invention discloses a high-temperature-resistant rectangular expansion joint. The high-temperature-resistant rectangular expansion joint comprises end pipes, a middle connection pipe, a corrugated pipe and filler; each end pipe comprises a first round outer casing pipe and a first rectangular inner casing pipe which are connected together in a sleeved manner; the middle connection pipe comprises a second round outer casing pipe and a second rectangular inner casing pipe which are connected together in a sleeved manner; the end pipes are arranged at the two ends of the middle connection pipe in a spaced manner; and the straight edge segments of the two ends of the corrugated pipe are sleeved with and fixedly connected to the outer wall of the first round outer casing pipe and the outer wall of the second round outer casing pipe correspondingly, and two compensating structures connected in series are formed; and the outer wall of the first rectangular inner casing pipe stretches into an inner hole of the second rectangular inner casing pipe and is in clearance fit with the inner hole of the second rectangular inner casing pipe. The improvement of the high-temperature-resistant rectangular expansion joint further lies in that the corrugated pipe is formed by two or more layers of thin-walled metal plates in a pressed manner; the outer walls of the straight edge segments of the corrugated pipe are provided with lantern rings; and the lantern rings, the straight edge segments of the corrugated pipe and the first round outer casing pipe or the second round outer casing pipe are connected into a whole in a welded manner, and a reinforced connector is formed. The high-temperature-resistant rectangular expansion joint is high in structural strength, resistant to high temperature and long in service life.
Description
technical field [0001] The invention relates to a pipeline safety device, in particular, the invention relates to a rectangular expansion joint. Background technique [0002] In large thermal power plants, cement and iron and steel smelting and other industries, solid particle material conveying pipelines often use rectangular expansion joints to play the role of absorption or compensation. The main defect of the rectangular expansion joint in the prior art is that the filler is easily lost into the pipeline from the gap between the first rectangular inner casing and the second rectangular inner casing, the bellows has poor high temperature resistance, is prone to failure, and has a short service life. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the invention proposes a high-temperature-resistant rectangular expansion joint that can significantly improve the high-temperature resistance performance of the bellows and significantly prolong...
Claims
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IPC IPC(8): F16L51/03
CPCF16L51/03
Inventor 杨朋松
Owner JIANGSU XINFANGYUAN ELECTRIC EQUIP MFG