The utility model relates to a guiding limit buried outside the grand finale to the expansion joint, including end pipe, pipe, casing, long pipe and corrugated pipe, tube and shell connection, corrugated pipe are respectively connected with the shell and the long pipe, diversion pipe end and end pipe connection, other end of the guiding pipe is extended into the long pipe. Near the end of the diversion pipe corrugated pipe is provided with a guide plate, corrugated pipe is provided with a middle spacing plate shell is provided with a limited block, between the spacing block and the spacing plate distance is greater than or equal to the maximum amount of expansion bellows. The outer circumference of the shell is uniformly distributed with a plurality of limiting blocks, and the limiting plate is arranged on the middle connecting pipe. The utility model solves the problems that the two groups of corrugated pipes of the traditional expansion joints are not consistent in displacement, the deformation is not synchronous, and the tension is easy to fail. The utility model adopts a limit block and a limiting plate, which can make the displacement of the two groups of corrugated pipes uniform, the deformation of the force is completely synchronous, and the corrugated pipe can not be damaged due to excessive stretching, thus the reliability of the whole expansion joint is higher.
【技术实现步骤摘要】
本专利技术涉及供热管道
,尤其是一种带有导向限位装置的直埋外压轴向型管道膨胀节。
技术介绍
在城市供热系统中,供热管道主要有架空敷设、地沟敷设、直埋敷设等形式。随着国内管道直埋敷设技术的发展,城市的集中供热管道大多采用直埋敷设方式。由于各地用户对于产品质量的要求不同,各膨胀节制造商的产品结构各不一样,制造水平也良莠不齐,这样就导致了用于直埋管道的金属膨胀节的失效事故频发,不仅给国家财产造成了一定的经济损失,而且给人们的生产、生活带来了很大影响,甚至造成人员伤亡。目前,国内普遍使用的传统膨胀节一般包括端管、导流管、外壳、长接管和相互连接的两组波纹管,端管通过端板与外壳连接,外壳与波纹管的一端连接,波纹管另一端与长接管连接,导流管的一端与端管连接,导流管另一端伸入到长接管内,其结构如图1所示。管道受热伸长时,两组波纹管受到拉伸,吸收管道的轴向位移较多。波纹管在拉伸过程中,虽然两组波纹管的规格相同,但受制造偏差的影响,导致刚度不一致,变形不完全同步,在同等管道推力下,波纹管位移不一致,造成波纹管失效。
技术实现思路
本专利技术的目的是提供一种能够使两组波纹管位移一致,受力变形完全同步,可靠性较高的导向限位直埋外压轴向型膨胀节。本专利技术的目的是通过采用以下技术方案来实现的:导向限位直埋外压轴向型膨胀节,包括端管、导流管、外壳、长接管和波 纹管,所述端管通过端板与外壳连接,所述波纹管通过其两端的波接管分别连接外壳和长接管,所述导流管的一端与端管连接,导流管另一端伸入到长接管内,所述波纹管靠近导流管的端部设有导向板,波纹管中部设有限位板,所述外壳上设有限位块,限 ...
【技术保护点】
一种导向限位直埋外压轴向型膨胀节,包括端管、导流管、外壳、长接管和波纹管,所述端管通过端板与外壳连接,所述波纹管通过其两端的波接管分别连接外壳和长接管,所述导流管的一端与端管连接,导流管另一端伸入到长接管内,其特征是:所述波纹管靠近导流管的端部设有导向板,波纹管中部设有限位板,所述外壳上设有限位块,限位块与限位板之间的距离大于等于所述波纹管的最大伸缩量。
【技术特征摘要】
1.一种导向限位直埋外压轴向型膨胀节,包括端管、导流管、外壳、长接管和波纹管,所述端管通过端板与外壳连接,所述波纹管通过其两端的波接管分别连接外壳和长接管,所述导流管的一端与端管连接,导流管另一端伸入到长接管内,其特征是:所述波纹管靠近导流管的端部设有导向板,波纹管中部设有限位板,所述外壳上设有限位块,限位块与限位板之间的距离大于等于所述波纹管的最大伸缩量。2.根据权利要求1所述的导向限位直埋外压轴向型膨胀节,其特征是:所述外壳的外圆周上均布有多个限位块,所述限位板设在中间接管上,中间接管的两端分别与波纹管连接,所...
【专利技术属性】
技术研发人员:洪亮,曹广金,尹明华,吴秀华,
申请(专利权)人:江苏贝特管件有限公司,
类型:新型
国别省市:江苏;32
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