Vacuum-resistant inner liner PTFE container and manufacturing process thereof

Abstract

The invention discloses a vacuum-resistant inner liner PTFE container and a manufacturing process thereof and belongs to the technical field of the inner liner PTFE container. The vacuum-resistant inner liner PTFE container comprises a container steel part, a PTFE layer is arranged in the container steel part, a porous plate is arranged between the container steel part and PTFE, a plurality of vacuum balance openings are arranged on the container steel part, a temporary steel tube group is connected to the container steel part via the vacuum balance openings, and a vacuum pump is connected tothe temporary vacuum tube group; after vacuum extraction of the container steel part is completed and an electric spark test is passed successfully, the temporary vacuum tube group is removed, the container steel part is connected with a balance tube assembly through the vacuum balance openings, and the balance tube assembly includes a fluorine-lined check valve and a fluorine-lined pipe. The vacuum-resistant inner liner PTFE container is simple in structure and convenient in construction, operation of drilling a plurality of holes in advance on an outer part of the container is not needed, workloads can be reduced, effects exerted on intensity of the container steel part by pressure can be reduced, local bulging can be prevented, and the vacuum-resistant inner liner PTFE container can besafely used in high vacuum working conditions.

Description

technical field [0001] The invention relates to a PTFE-lined container and a manufacturing process thereof, in particular to a vacuum-resistant PTFE-lined container and a manufacturing process thereof, belonging to the technical field of PTFE-lined containers. Background technique [0002] There are currently two ways of lining PTFE containers that are more common in the market. One of them is to use one-sided sodium activated or back-coated glass fiber PTFE sheet to be directly attached to the pretreated container to be lined with an adhesive, and then cut off the excess part and then use PFA welding rod for alignment. One is to make the PTFE liner by lap welding first, then the surface is sodiumized and coated with adhesive, and then put into the steel part of the container to shape the temperature and increase the pressure to combine PTFE and Container steel pieces are glued together. The above two methods are widely used in the chemical industry. [0003] Defects and ...

AI Technical Summary

Problems solved by technology

If there are too many holes drilled, the workload will be large, and on the other hand, it will affect the strength of the steel parts of the container, especially the pressure vessel; if the number of holes drilled is too small, the air in the interlayer cannot be effectively eliminated, and large or small bulges will easily occur locally.

[0005] Not suitable for use in a vacuum state, especially not suitable for use in a high vacuum state

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