Pressure testing tool for opening connecting tubes without flange seal

Abstract

A pressure testing tool for opening connecting tubes without flange seal comprises a pressure testing ring, a sealing sheet, a blind flange, an exhaust pipe, a water inlet pipe and a plurality of fixing rib plates. The pressure testing ring is sleeved on the outer wall of a pipe, the sealing sheet is welded at a pipe orifice, the blind flange is in close compression joint with the sealing sheet and is connected with the pressure testing ring by locking parts, one end of the exhaust pipe is penetratingly arranged on the blind flange and the sealing sheet and is communicated with an inner cavity of the pipe, the other end of the exhaust pipe is bent upwards, one end of the water inlet pipe is penetratingly disposed on the blind flange and the sealing sheet and is communicated with the inner cavity of the pipe, the other end of the water inlet pipe is bent upwards, and the fixing rib plates are peripherally arranged along the outer wall of the pipe and used for supporting the pressure testing ring. Compared with the prior art, the pressure testing tool is low in welding load, cutting and grinding workload for the pipe orifice is low after pressure testing, a groove is not damaged, the length of the pipe is ensured to be unchanged, and the pressure testing tool is particularly applicable to pressure tests for equipment and pipelines with machined grooves and opening connecting pipes made of pure materials.

Description

technical field [0001] The invention relates to a pressure test tool in the field of petrochemical equipment, in particular to a pressure test tool for an open joint without flange seal. Background technique [0002] Pressure test is the most effective means to retest raw materials and test equipment manufacturing quality of petrochemical equipment, and it is also the most important method to test the pressure bearing capacity of equipment. Steel pipe is one of the most important components connecting high-pressure petrochemical equipment with other equipment. The pressure test of the steel pipe in high-pressure petrochemical equipment is to use tooling to seal the end of the steel pipe, inject water into the steel pipe, pressurize and maintain the pressure, and check whether the equipment has obvious deformation and leakage. [0003] So far, there are mainly three types of pressure test equipment for domestic high-pressure steel pipes, the first is the pipe end clamping ty...

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Problems solved by technology

[0005] However, the pressure test method of the above-mentioned welded blind plate will produce a heat-affected zone when the blind plate is welded at the end of the pipe. Therefore, it is necessary to reserve a certain length when purchasing the pipe. Cutting off the excess length of the pipe is not only a waste of material, but also time-consuming and laborious; at the same time, there is a large workload for welding the blind plate, and it is difficult and easy to damage the groove after the pressure test. Defects such as shortened length

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