Probe cabin sealing structure of trenchless guide drill

Abstract

The invention discloses a probe cabin sealing structure of a trenchless guide drill. The probe cabin sealing structure comprises the guide drill and a guide plate; a probe cabin is formed on the guide drill along the axial direction; a probe is placed in probe cabin; one end of the probe cabin is closed and the other end of the probe cabin is provided with a choke plug; a first sealing ring and a second sealing ring which are used for performing the sealing effect are arranged between the choke plug and the probe cabin; a plurality of signal grooves which are communicated with the probe cabin are formed in the guide drill along the radial direction; the plurality of signal grooves are uniformly distributed along the circumferential direction of the probe cabin; rubber is arranged in the signal grooves in an injection mode. According to the probe cabin sealing structure of the trenchless guide drill, the rubber is arranged in the signal grooves, the rubber and the signal grooves are completely adhesive into a whole after vulcanization, the long-term sealing can be effectively achieved under the environments such as the large vibration, large abrasion and acid and alkali corrosion of the construction mud water, and accordingly the sealing performance of the probe cabin signal grooves is improved and meanwhile the first sealing ring and the second sealing ring are arranged between the choke plug and the probe cabin and matched with the choke plug to achieve the triple seal and accordingly the sealing performance of a probe cabin end is effectively improved.

Description

technical field [0001] The invention relates to a non-excavation pilot drill, in particular to a sealing structure for a rod chamber of the non-excavation pilot drill. Background technique [0002] At present, the sealing of the signal groove of the non-excavation directional drilling rod bin on the market is usually made by inserting a suitable plastic plate into it, and the surface layer is bonded and sealed with AB glue. The sealing structure of the signal groove of the probe bin, the plastic plate and the signal groove are not integrated, often due to excessive vibration during use, or a slightly longer use time, or hard geological conditions, etc., resulting in AB glue wear or cracking, causing water to enter the probe chamber and damage the expensive probe rod, and the end of the existing non-excavation directional drilling rod chamber is sealed with a bulky head, because of its poor sealing performance, it is also easy to damage the probe rod due to water ingress. Th...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the above problems, to provide a probe chamber sealing structure of a non-excavation pilot drill, to solve the poor sealing performance of the probe chamber seal structure of the traditional trenchless pilot drill, and the seal is easy to fail, causing the probe The problem of water entering the tank and damaging expensive probes

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