Detection device for detecting tightness of freezing pipe

Abstract

The invention discloses a detection device for detecting tightness of a freezing pipe. The detection device for detecting the tightness of the freezing pipe comprises a pressing pipeline, wherein one end of the pressing pipeline is connected with a pressing device, the other end of the pressing pipeline is connected with a first connector, a pressure detection device used to detect medium pressure in the pressing pipeline is installed on the pressing pipeline, the freezing pipe is provided with a medium containing cavity, the medium containing cavity is communicated with the external world through an opening formed in the freezing pipe, the first connector is movably connected with the opening in seal mode, the first connector is of a hollow structure, and the pressing pipeline and the first connector are communicated with the medium containing cavity. The detection device for detecting the tightness of the freezing pipe has the advantages of movably connecting the first connector with the opening in the seal mode, improving operation efficiency, reducing operation difficulty, and preventing the phenomenon that slurry enters the freezing pipe and jams the freezing pipe.

Description

technical field [0001] The invention relates to a detection device, in particular to a detection device for detecting the tightness of a freezing tube. Background technique [0002] Sinking by freezing method is a special drilling method, which uses the freezing curtain formed around the wellbore to isolate groundwater and resist ground pressure, so as to achieve the purpose of safe construction of the wellbore. The key to forming the freezing curtain is the normal operation of the freezer. The freezer is installed in the freezing borehole, including freezing pipes, liquid supply pipes, etc. After the freezing drilling construction is completed, the seamless steel pipe is lowered and installed in the hole, which is the frozen pipe. Therefore, the installation quality of the freezing pipe directly determines the normal operation of the freezer, and also determines the success or failure of the freezing method for drilling wells. Therefore, after the freezing pipe is lowere...

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Problems solved by technology

Its disadvantages are: troublesome welding and low construction efficiency; after the first inspection, the pressure pipeline welded on the cover plate needs to be removed. Due to the rough welding surface, the sealing of the welding place cannot be guaranteed during the second inspection, and leakage is prone to occur. The installation time of the detection device is prolonged, which is not conducive to the tightness detection; after the detection is completed, the mud easily enters the freezing pipe through the holes on the cover plate and the freezing pipe, which affects the work of the pressing equipment and shortens the life of the pressing equipment. At the same time, the mud When it enters the freezing pipe, it will solidify and freeze in the freezing pipe during the freezing operation, causing the liquid supply pipe transporting the low-temperature freezing medium to freeze in the frozen mud and cannot be removed, causing inconvenience in construction

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