Pressure pipeline connecting and sealing device for conveying fluid

Abstract

The invention discloses a pressure pipeline connecting and sealing device for conveying fluid. Parts such as a pipe sleeve, a butt joint clamping key, a pressure response type seal, a guide lining, aclamping key, a clamping sleeve and a clamping sleeve limiting device are adopted for carrying out radial connection on two butt joint seamless pipes with grooves machined in heads, and meanwhile pipelines are sealed so as to prevent fluid from leaking outwards. The structure is high-pressure-resistant, can be used for connecting pipelines with various pipe diameters, is convenient to install, connect, replace and seal, and particularly has the advantages of being safe and reliable in sealing, not prone to damage, convenient to produce and machine, capable of machining connecting grooves without damaging the compressive strength of the pipelines, free of reducing the drift diameter in the pipelines and the like for some liquid supply pipelines which are rigidly connected for a long distance.

Description

Technical field [0001] The invention relates to the field of fluid transportation, in particular to fluid transportation pipelines. Background technique [0002] The existing fluid transportation pipeline connection methods are: 1. Threaded connection: mainly used for low pressure pipelines. 2. Flange connection: large volume, need to weld flange on the pipe head, complicated assembly operation, low pressure resistance. 3. Socket connection: the pipe is required to be connected in a sealed connection. If it is a rigid pipe, it is not suitable to replace the seal. At the same time, the pipe head is required to process the female and female sockets. 4. Clamp-style groove connection: clamp parts are required. The clamp is a split clamp, which requires high precision in the processing of the clamp; the pipe head needs to be processed with grooves. If the groove is processed by pressing, it will affect the internal communication of the pipeline. Diameter; if the car-made groove is u...

AI Technical Summary

Problems solved by technology

2. Flange connection: large volume, flanges need to be welded on the pipe head, complex assembly operation, low pressure resistance

4. Clamp-type groove connection: clamps are required, and the clamps are split-type clamps, which require high processing accuracy for the clamps; the pipe head needs to be processed with grooves. If the grooves are processed by pressing, it will affect the internal flow of the pipeline. diameter; if the groove is made by car, it will affect the wall thickness of the pipe and weaken the pressure resistance of the pipe, and the installation requirements are high, the seal is easily damaged or the sealing position leaks

5. Ferrule type connector: firm connection, high pressure resistance, good sealing performance, but it can only be used for small diameter pipes, not for large diameter pipes

[0003] None of the existing connection methods of these fluid pipelines can realize the convenience of installation, replacement and maintenance, and can adapt to the connection of various pressure levels and various pipe diameters.

Images