Expansion device special for petroleum and natural gas heat shrinkable pipes

Abstract

The invention discloses an expansion device special for petroleum and natural gas heat shrinkable pipes. The expansion device comprises a communicating pipeline, a connecting port, an expansion control device, a protective housing, a force-driven extrusion set, an electroactive polymer starter, a pressure trigger device, a gear set, a rotating translation device, a buffer control device, and a connecting and circulating device located in the middle of the inside of the protective housing. The connecting pipeline is embedded inside the expansion control device and located on the same axis. Oneend of the force-driven extrusion set is movably connected to the buffer control device. The electroactive polymer starter is located on the outer surface of the connecting and circulating device. Thepressure trigger device is connected to the point of the electroactive polymer starter point through a wire. The gear set is mounted on the side of the rotating translation device. According to the prior art, the invention adopts the size capable of passing through the connecting port for connection, so the flexibility is better. When the flow rate is too large, the flow can touch the internal equipment through excessive pressure to buffer and reduce the flow channel.

Description

technical field [0001] The invention relates to the field of pipe expansion devices, in particular to a special pipe expansion device for oil and gas heat shrinkable pipes. Background technique [0002] Heat-shrinkable sleeve, also known as heat-shrinkable protective sleeve, provides insulation protection for wires, cables and wire terminals. It has high-temperature shrinkage, softness, flame retardancy, insulation and corrosion resistance, etc. It is widely used for insulation protection of various wiring harnesses, solder joints, and inductors. And metal tube, rod anti-rust, anti-corrosion, etc., heat-shrinkable sleeve is a special polyolefin material heat-shrinkable sleeve, can also be called EVA material, the material used for heat-shrinkable tube is glass at room temperature, heating After that, it becomes a high elastic state. During production, the heat shrinkable tube is heated to a high elastic state, a load is applied to make it expand, and it is cooled rapidly whi...

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Problems solved by technology

[0002] Heat-shrinkable sleeve, also known as heat-shrinkable protective sleeve, provides insulation protection for wires, cables and wire terminals. It has high-temperature shrinkage, softness, flame retardancy, insulation and corrosion resistance, etc. It is widely used for insulation protection of various wiring harnesses, solder joints, and inductors. And metal tube, rod anti-rust, anti-corrosion, etc., heat-shrinkable sleeve is a special polyolefin material heat-shrinkable sleeve, can also be called EVA material, the material used for heat-shrinkable tube is glass at room temperature, heating After that, it becomes a high elastic state. During production, the heat shrinkable tube is heated to a high elastic state, a load is applied to make it expand, and it is cooled rapidly while maintaining the expansion, so that it enters a glass state, and this state is fixed. In use Once heated, it will return to a high elastic state, but when the load is gone, it will retract. The conversion of the interface size is poor, and it is difficult to control the flow after it is connected.

[0003] For the current special expansion device for natural gas heat shrinkable tubes, the size of the equipment interface is relatively fixed, and the flexibility of exchange is poor. It is more troublesome for interfaces of different sizes. When it is connected, the flow rate is difficult to control.

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