一种PPH管材的轴向热补偿伸缩节结构

Abstract

本实用新型公开了一种PPH管材的轴向热补偿伸缩节结构，包括第一管体，所述第一管体的内壁固定连接有固定环，所述第一管体的两端内壁均开设有黄油腔，所述第一管体内设有伸缩结构，所述第一管体的外壁对称固定连接有连接框。本实用新型，通过设置波纹管、第二管材、限位环、法兰盘、密封垫等，当管道系统温度降低收缩时，会对伸缩节产生轴向拉力，此时，被压缩的波纹管依靠其自身的弹性恢复力向外伸展，推动第二管材从第一管体中向外滑动，补偿了管道因冷缩而产生的长度减少，保持了管道系统的紧密连接，防止因收缩导致连接处松动或损坏，同时限位环除了导向作用外，其滑动行程也间接起到了机械限位的作用，防止波纹管被过度拉伸而损坏。

Claims

1. A structure of axial thermal compensation expansion joint of PPH pipe, comprising a first pipe body (1), characterized in that: The inner wall of the first tube (1) is fixedly connected with a fixing ring (2), and the inner walls of both ends of the first tube (1) are provided with grease cavities (3). The first tube (1) is provided with a telescopic structure (4). The outer wall of the first tube (1) is symmetrically fixedly connected with connecting frames (7). Each connecting frame (7) is provided with a snap-fit ​​hole on one side. Each connecting frame (7) is slidably fitted with a protective cover (8) on its outer wall. Each protective cover (8) is provided with a quick-release structure (9). The telescopic structure (4) includes a first pipe (401) fixedly connected to the inner wall of the fixed ring (2), a corrugated pipe (402) fixedly connected to one end of the first pipe (401) away from each other, a second pipe (403) fixedly connected to one end of each corrugated pipe (402), a limiting ring (404) fixedly connected to the outer wall of each second pipe (403), and each limiting ring (404) slidably connected to the inner wall of the first pipe body (1).

2. The axial thermal compensation expansion joint structure for PPH pipes according to claim 1, characterized in that: Each of the second pipes (403) is slidably connected to one end of the first pipe body (1), and a flange (405) is fixedly connected to one end of each of the second pipes (403), and a sealing gasket (406) is fixedly connected to one side of each flange (405).

3. The axial thermal compensating expansion joint for PPH pipe according to claim 1, characterized in that: The quick-release structure (9) includes a fixed frame (901) fixedly connected to one side of the protective cover (8), a sliding rod (902) is slidably connected through one side of the fixed frame (901), and a pull button (904) is fixedly connected to one end of the sliding rod (902).

4. The axial thermal compensating expansion joint for PPH pipe according to claim 3, characterized in that: The other end of the sliding rod (902) is fixedly connected to a snap-fit ​​post (903), which is slidably connected to one side of the protective cover (8) and is adapted to the corresponding snap-fit ​​hole.

5. The axial thermal compensating expansion joint for PPH pipe according to claim 4, characterized in that: A return spring (905) is fitted on the sliding rod (902). One end of the return spring (905) is fixedly connected to one side of the inside of the fixed frame (901), and the other end is fixedly connected to one side of the snap-fit ​​post (903).

6. The axial thermal compensating expansion joint for PPH pipe according to claim 1, characterized in that: Two mounting seats (5) are fixedly connected to one side of the first tube body (1). The bottom of each mounting seat (5) extends into the corresponding grease cavity (3). Each mounting seat (5) is inside the corresponding connecting frame (7).

7. The axial thermal compensating expansion joint for PPH pipe according to claim 6, characterized in that: Each of the mounting bases (5) has a threaded hole on its upper surface, and each of the threaded holes is threaded with a grease nipple seat check valve (6).

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