Spliced sea bed excess pore pressure measuring probe with range protection devices
A technology for protection devices and measuring probes, which is applied in the direction of fluid pressure measurement using optical methods, can solve the problems of difficulty in carrying, consuming material resources, financial resources and time, and occupying a large space, so as to save preparation time and financial resources , to achieve the effect of range protection and low production cost
Active Publication Date: 2016-01-06
OCEAN UNIV OF CHINA
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Problems solved by technology
Due to the complex internal structure of the sensor range protection device, it is more difficult to make it built into the probe rod
In actual observation, it is often necessary to design excess pore pressure measurement probe rods with different lengths and different observation intervals according to specific observation conditions, which consumes a lot of material, financial and time resources
Not only that, the traditional excess pore pressure measurement probe rod is too long, takes up a lot of space, and is difficult to carry, which is inconvenient in actual field measurement
At present, there is no deep seabed ultra-pore water pressure measurement probe that can simultaneously realize the two technologies of sensor range protection and probe can be spliced
Method used
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[0028] Such as Figure 1-6 As shown, the spliceable seabed excess pore pressure measuring probe rod with a range protection device is characterized in that the top of the probe rod is a sealed cabin connection device 1, and the bottom is a cone head 5, and the sealed cabin connection device 1 and the bottom cone head 5 is the main body of the probe rod, the main body of the probe rod is composed of a plurality of cylindrical hollow sleeves 3 connected in series, and each adjacent two hollow sleeves 3 are connected by a connecting device 4,
[0029]Both ends of the hollow sleeve 3 are engraved with internal threads 9; the connecting device 4 is cylindrical as a whole, and the diameter of the middle part is equal to that of the hollow sleeve 3, and both ends are engraved with internal threads 9 to match the internal threads 9. The external thread 8 of the connecting device 4 has a middle inner cavity 13 on the side of the middle part, and the connecting device 4 has an upper cha...
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A spliced sea bed excess pore pressure measuring probe with range protection devices comprises multiple cylindrical hollow casings which are connected end to end. Every two adjacent hollow casings are connected by a connecting device. Each connecting device is provided with a middle cavity in the side of the middle and is provided with upper and lower chambers communicated with the middle cavity at the upper and lower ends, and the lower chamber is closer to the axis than the upper chamber. Each connecting device is provided with a water pipe which is through up and down. An optical fiber grating differential pressure sensor is installed in each upper chamber. A porous stone is installed at the outer port of each middle cavity. A range protection device is installed in each middle cavity, and the range protection device contains a piston. When the external pressure is too large, the pistons seal the upper chambers to block the association of the sensors with the external environment pressure. The spliced seabed excess pore pressure measuring probe has the advantages of simple structure, low production cost, and reliable operation. With the device, the excess pore pressure of sea beds of different depth can be measured, and range protection can be realized automatically without affecting normal use of the excess pore pressure measuring probe.
Description
technical field [0001] The invention relates to a spliceable seabed excess pore pressure measuring probe rod with a range protection device, which is used to realize the self-protection of the sensor and the length adjustment of the probe rod, and belongs to the technical field of marine observation. Background technique [0002] The in-situ observation of seabed engineering geology is an important means for marine science to enter the deep sea. It plays an important role in revealing the dynamic response process of modern sediments under deep-sea dynamics and in-depth understanding of marine dynamic geological processes. Pore water (gas) pressure (hereinafter referred to as pore pressure) is a sensitive indicator reflecting the characteristics of seabed sediments, and its changes can lead to a decrease in the strength of sediments, or even liquefaction, which in turn can cause geological disasters such as submarine landslides. It is the excess pore pressure rather than th...
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IPC IPC(8): G01L11/02
Inventor 刘涛张美鑫崔逢贾永刚魏广庆柴万里周蕾
Owner OCEAN UNIV OF CHINA