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Technological method for enhancing bearing capacity of pressure-resistant structure

A technology of bearing capacity and process method, which is applied in the field of enhancing the bearing capacity of pressure-resistant structures, can solve the problems of inability to offset each other, reduce the ultimate bearing capacity of the structure, increase, etc., achieve accurate quantitative control, eliminate initial stress defects, and reduce process effect of difficulty

Active Publication Date: 2013-11-27
QINGDAO SCAN EQUIP TECH CO LTD
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AI Technical Summary

Problems solved by technology

After the stress distribution produced by this technology and the stress distribution caused by the working pressure of the pressure-resistant spherical shell are superimposed, not only cannot cancel each other, but increase in the same direction, reducing the ultimate bearing capacity of the structure

Method used

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  • Technological method for enhancing bearing capacity of pressure-resistant structure
  • Technological method for enhancing bearing capacity of pressure-resistant structure

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Embodiment Construction

[0044] combined with figure 2 , to further describe the present invention:

[0045] Step 1: Prepare the plate, and then manufacture the pressure-resistant spherical shell 1 through conventional processes such as welding or machining. The above is the same as the prior art, and will not be repeated here;

[0046] Step 2: Open two threaded holes with a diameter of about 2 mm on the symmetrical position of the spherical shell 1, and install the upper high-pressure threaded double-way joint 2 and the lower high-pressure threaded double-way joint 3;

[0047] Step 3: With the center of the ball as the center, draw a line on the outer surface of the spherical shell, and the formed circle is perpendicular to the central axis of the threaded hole. Paste 4 to 8 groups of strain gauges 4 on the scribe line and make them evenly distributed on the circumference. Each group of strain gauges is composed of two strain gauges in the tangential direction and perpendicular to the tangential...

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Abstract

The invention relates to the technical field of maritime work and oil production equipment, in particular to a technological method for enhancing bearing capacity of a pressure-resistant structure. The technical scheme comprises the steps as follows: a spherical shell is prepared; drill holes are connected, and a strain gauge is glued, so that the spherical shell is connected with a booster pump and a data collection system; pressurization is performed step by step, pressure maintaining is performed; the strain change rate of each observing point is smaller than 0.01s<-1> after each observing point is in a full-plastic state, and the spherical shell automatically performs sphere hastening; pressurization is continuously performed step by step until strain of each point reaches above 0.02, then the pressurization is stopped, and the pressure maintaining is performed; and orientational and uniformly-distributed residual stress is formed after the unloading treatment is performed step by step. According to the technological method for enhancing the bearing capacity of the pressure-resistant structure, the bearing capacity is further improved, the influence of various initial defects is reduced, and then the technological difficulty is reduced; and the bearing limit is improved through stress treatment, so that the bearing capacity can be improved on the premise that the structure weight is not increased, the buoyancy reservation of a marine structure can be greatly increased, and the method has the outstanding significance to a deep submersible vehicle.

Description

technical field [0001] The invention relates to the technical field of marine engineering and oil production equipment, in particular to a process method for enhancing the bearing capacity of a pressure-resistant structure. Background technique [0002] At present, the spherical shell structure is the most ideal pressure-resistant structure. For the huge pressure underwater or underground, the spherical shell structure is the structural form with the least failure mode, which can effectively balance the strength and stability failure problems, and then obtain the maximum ultimate bearing capacity. Therefore, the spherical shell is an important structural form of offshore and oil production equipment. [0003] In the current manufacturing process of the pressure-resistant spherical shell, it is generally shaped by casting, welding or machining. The residual stress introduced in the processing process is released by means of vibration, ultrasonic or heat treatment. Alth...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 初冠南鲁国春燕炳波
Owner QINGDAO SCAN EQUIP TECH CO LTD
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