hdd ditch witch collars manufacturer skills are mainly applied to the construction of municipal engineering, pipeline facilities, sewer pipes, and pressure pipes. The explosion (crack) pipe method, also known as the expansion pipe method, is mainly used in the replacement of pressure pipes and sewers. The construction length is 100-900 meters, the diameter of the pipe is 70-1060 meters, and the construction process of the explosive pipe method is divided into "fixed cracked pipe process" and "pneumatic construction method". This process is generally selected at the distance of 1 meter to 2 meters on the ground, and the pipe diameter is 200-350 mm, which saves 10%-50% compared with the excavation. Below 6 meters on the ground, the pipe diameter is 800 mm, and the project cost should be saved by 20%-25%. This process is generally used in Western countries,

Now, the world's leading cities no longer use the traditional excavation and pipe replacement construction skills, instead of non-excavation skills, especially the United States, the United Kingdom and other developed countries are not allowed to excavate urban pavement, completely adopt the trenchless pipeline replacement. hdd ditch witch collars manufacturer is a high-tech occupation. Several trenchless new skills are generally selected. Horizontal directional drilling method, explosive (type) pipe method, micro tunnel, pipe jacking method, screw drilling method. In foreign countries, if the above trenchless skills are used to lay or replace pipelines in cities, the user should pay a certain skill usage fee to the construction process organizer. At the same time, there are strict regulations for users in the process of use, such as mud recovery.

hdd ditch witch collars When manufacturer of HDD ditch witch collars When manufacturer of HDD ditch witch collars, do not use large and small drill pipes together. Because the strength of small drill pipes is not the same as that of large drill pipes, mixed drill pipes may simply crack or become deformed. The button oil can not be replaced by butter, and the grinding condition of various parts should be often checked, and the drill pipe with too large a difference in wear degree is also simply a risk. When using the front drill pipe, the pre-tightening force on the buckle should not be too large, which simply leads to the difficulty of the shackle, and the male and female buckle should be arranged, and the buckle oil should be often rubbed to extend the service life.

hdd ditch witch collars manufacturer Key skills in construction: During construction, skilled personnel first understand the corrosion in the pipe through the visual system, carefully polish the inner wall with a metal wire, and then temporarily shrink a diameter slightly larger than the old pipe, so that it can easily pass through the old pipe. Then loosen the "bundle" of the PE pipe, so that it naturally expands and quickly fits tightly in the pipe. The diameter of the pipe hardly changes significantly.

Trenchless skills refer to laying, replacing and correcting various underground pipelines under the condition of excavation of a small part of the surface (generally referring to excavation of a small area at the entrance and exit) through guided and directional drilling techniques, and thus have high social and economic effects. It mainly includes horizontal directional drilling, pipe jacking, micro tunnel, pipe explosion, impact and other skills and methods. This skill originated in the 1970s, and is now applied to the construction of new pipelines and the correction of old pipelines in the fields of water supply, drainage, power, communication, gas, etc., and can also be applied to the maintenance of cultural relics and ancient buildings.

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