The world's first spiral ramp small-turn continuous belt conveyor rolled off the production line in China Railway Construction Heavy Industry Co., Ltd.

Recently，The spiral ramp continuous belt conveyor of Beishan underground laboratory construction project is offline in the third industrial park of China Railway Construction Heavy Industry.，It marks the success of the world's first spiral ramp small-turn continuous belt conveyor test.。

Panoramic view of the test line of the world's first spiral ramp small-turn continuous belt conveyor

In the field of global underground construction，Space turn tunnels are a high risk.、Difficult difficulty，The construction of the spiral turn tunnel is even more difficult.。This is the case with the Beishan Underground Laboratory Construction Project.，Total length of spiral tunneling7.Five kilometers，The whole journey is 10%Dip downhill with horizontal 250m radius turn and vertical 430m radius turn，Horizontal turn angle up to 720 degrees，Total lifting height 560m，The working condition is very complicated，There are no similar cases at home and abroad.。

Among，The transportation of muck is a key link in tunnel construction.，It plays a decisive role in construction efficiency.，In addition, the continuous belt conveyor has a large capacity.、Long distance、Safety and environmental protection and many other advantages，Undoubtedly, it has become the preferred equipment for slag tapping in spiral ramp tunnel.。The existing continuous belt conveyor is generally arranged in a straight line.，Unable to meet the working condition requirements of the project，This poses a great challenge to the research and development of continuous belt conveyor.。

Slag carrying test of spiral ramp continuous belt conveyor

Tiejian Heavy Industry has been developing and manufacturing belt conveyor products since 2008.，Up to now, more than 100 sets of long-distance tunnel belt conveyor have been completed.，The total mileage of the belt conveyor is more than 400 kilometers.，Accumulated a lot of belt conveyor product design experience。Since receiving the project，Technical R & D personnel are keen on innovation，For storage belt、Deflection、Drive and other key technical points to develop a small turning scheme for spiral ramp，Realize non-stop continuous tunneling，Prevent deviation of adhesive tape，Improve the service life of equipment。The design scheme passed the expert review meeting in July this year.。

Group photo of R & D team of China Railway Construction Heavy Industry

Since product development，Railway Construction Heavy Industry R & D and production personnel strive to overcome the difficulty of design.、Test sites are limited、Assembly time is tight、The debugging task is heavy、The epidemic affects the supply cycle and other difficulties.，From the beginning of assembly to the completion of the test，It took only one month.，The test belt conveyor runs well under no-load and slag-carrying conditions.。

The successful development of the product，It is an important achievement to promote the high-quality development of enterprises.，It fills in the blank of continuous slag tapping of spiral ramp small turning tunnel at home and abroad.，Improve the core competitiveness of belt conveyor products of Railway Construction Heavy Industry，It has created a typical demonstration for the construction project of space turning tunnel.，It highlights the responsibility of the central enterprises.。

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