Internal and external pull type pressure container connection pipe pressure test device

Abstract

The invention discloses an internal and external pull type pressure container connection pipe pressure test device which comprises a flange cover hermitically connected to a connection pipe flange anda connection pipe sealing device located inside a pressure container, wherein the connection pipe sealing device comprises a sealing pipe coaxial with a connection pipe; a sealing plate parallel to the flange cover is arranged in the sealing pipe; a pull cover plate is arranged at one end, which is far away from the pressure container, of the sealing pipe; the pull cover plate is connected with the flange cover through a pull screw rod; the sealing plate is arranged on the pull screw rod in a sleeving manner, and a sealing structure is arranged between the sealing plate and the pull screw rod; a curved-surface ring plate matched with the inner surface of the pressure container in shape is fixedly connected to one end, which is close to the pressure container, of the sealing pipe; the curved-surface ring plate presses the inner surface of the pressure container; a sealing gasket II is arranged between the curved-surface ring plate and the inner surface of the pressure container; a pressure test connection pipe is arranged on the flange cover. The internal and external pull type pressure container connection pipe pressure test device can realize a local pressure test on a compositelayer pressure container, shorten the transformation working period of the composite layer pressure container, and reduce the transformation cost of the composite layer pressure container.

Description

technical field [0001] The invention relates to a partial pressure test device, in particular to a pressure test device for connecting pipes of internally and externally pulled pressure vessels. Background technique [0002] When some processes of petrochemical production plants are optimized or changed, some pressure vessels need to be partially modified, such as adding new nozzles or other accessories to the equipment, or changing the diameter of the original nozzles of the equipment. Article 5.2.5 of the TSG21-2016 "Safety Technical Supervision Regulations for Stationary Pressure Vessels" stipulates in Article 5.2.5 of the pressure test for modification and major maintenance: if the main pressure components are replaced or newly added by welding (bonding), in the modification and major maintenance The pressure test shall be carried out during the repair construction. [0003] The equipments to be repaired and rebuilt in the plant are already put into use, and the constru...

AI Technical Summary

Problems solved by technology

However, the pressure test box cannot be used in composite layer pressure vessels, because the pressure test box is welded on the composite layer of the pressure vessel, and the composite layer will be torn due to insufficient strength during local pressure testing.

[0005] At present, there is no relatively complete local pressure test solution for pressure vessels with composite layers

Images