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Casting mold for vortex-induced vibration suppression device

A suppression device and vortex-induced vibration technology, applied in the field of casting molds, can solve the problems of difficult mechanization and batch production, difficult mechanization production, complex manufacturing process, etc., to achieve uniform temperature, improve surface quality, and smooth circulation Effect

Active Publication Date: 2010-12-08
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But generally, the vortex-induced vibration suppression device requires a specific cross-sectional shape, so its manufacturing process is very complicated, and it is difficult to realize mechanization and mass production. For example, a vortex-induced vibration suppression device made of polyurethane elastomer, due to its complex structure, It is difficult to realize mechanized production in production

Method used

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  • Casting mold for vortex-induced vibration suppression device
  • Casting mold for vortex-induced vibration suppression device
  • Casting mold for vortex-induced vibration suppression device

Examples

Experimental program
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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the drawings and embodiments.

[0030] Such as figure 1 , figure 2 As shown, the marine riser vortex-induced vibration suppression device 100 is a tubular protection device that surrounds the outer surface of the marine riser that is vulnerable to the impact of ocean currents. It is generally made of corrosion-resistant and erosion-resistant polyurethane elastic material. Its appearance generally has spiral fins 101, and its head and tail ends have socket protrusions 102 and socket grooves 103. In the actual engineering application process, it is difficult to put a complete vortex-induced vibration suppression device directly onto the pipe from one end of the ocean riser, but it is necessary to pre-make the vortex-induced vibration suppression device into the upper part 104 and the lower part 105 The two halves are then fastened to the marine riser 107 with a steel band 106.

[0031] Therefore, in ...

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PUM

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Abstract

The invention discloses a casting mold for a vortex-induced vibration suppression device. The casting mold comprises an underframe, a rotating tilt stand, a female die, a female die support, a male die, a male die support, a rotating mechanism, a pressing mechanism, a hydraulic station, a heating device and the like; the female die consists of a semicircular female mold with a spiral groove, and a built-in heating coil; the male die consists of a semicircular male mold; the rotating mechanism and the pressing mechanism are hydraulic power mechanisms to control the rotating tilt stand and the male mold to oscillate; the mold comprises two sets to realize the casting of two parts of the vortex-induced vibration suppression device; and finally the two half parts are assembled into a molded product of the vortex-induced vibration suppression device.

Description

Technical field [0001] The invention relates to a casting mold, in particular to a casting mold of a vortex-induced vibration suppression device for protecting ocean risers. Background technique [0002] The offshore riser is the key equipment connecting the offshore operating platform and the subsea drilling and production facilities in the deep-sea oil and gas development system, such as drilling riser casings, fluid transfer risers, etc., and its cost often exceeds 50% of the entire system. When the ocean current passes through the riser structure, alternating vortices will be generated on both sides of the riser, thereby forming periodic pulsating force on the surface of the structure, especially in the transverse direction perpendicular to the current, the vortex induced periodic lift The vibration amplitude is large, and it is easy to form vortex-induced vibration. If the vortex-induced vibration frequency is close to the natural frequency of the riser, synchronization or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C39/26B29C39/38
Inventor 李新仲张晓灵贾旭杜宝银徐阳杨加栋许亮斌蒋晓斌矫滨田相政乐
Owner CHINA NAT OFFSHORE OIL CORP
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