Pipe orifice butt joint method and device of concrete pipeline

Abstract

A pipe orifice butt joint device of a concrete pipeline is used for butt joint of a first pipeline and a second pipeline, the first pipeline is located at the downstream position where fluid flows, and the second pipeline is lifted by a crane in the mode that a spigot faces a bell mouth of the first pipeline and gradually moves to the state that the spigot and the bell mouth are communicated with each other. The device comprises a detection part, the two ends of the detection part are connected to a first axis point and a second axis point respectively, and the first axis point and the second axis point penetrate through the axis of the first pipeline and the axis of the second pipeline respectively. The detection part is configured to generate an elastic potential energy against offset in response to offset of theaxis of the second pipeline in a longitudinal plane relative to the axis of the first pipeline to generate a bending strain force on itself to guide a first axis point and a second axis point in a collinear and coaxial state and / or obtain a pipe orifice longitudinal gap based on a relative position relation of the first axis point and the second axis point on the longitudinal plane.

Description

technical field [0001] The invention relates to the field of pipeline construction, in particular to a nozzle butt joint method and device for concrete pipelines. Background technique [0002] The construction of water conservancy facilities is a kind of urban pipe network construction project. It usually uses multiple prefabricated pipes, such as concrete prefabricated pipes, and uses the socket method to connect the upstream and downstream pipes. According to the pre-designed construction plan and construction process, Lay the pipes according to the pre-specified route. [0003] CN113309912A relates to an interface sealing structure and sealing method of concrete pipelines, which are used to solve the shortcomings of poor pressure bearing capacity of concrete pipelines and easy leakage of liquid in the pipes existing in the prior art. The interface sealing structure of the concrete pipeline includes a bearing tube, an intubation tube coaxially connected with the bearing t...

AI Technical Summary

Problems solved by technology

[0003] CN113309912A relates to a concrete pipeline interface sealing structure and sealing method, which is used to solve the disadvantages of poor pressure bearing capacity of concrete pipelines and easy leakage of liquid in the pipes existing in the prior art

[0004] However, the prior art does not involve the problem of how to control the longitudinal gap when connecting pipes. According to the acceptance criteria stipulated in the document "Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering", the longitudinal gap between the nozzles of reinforced concrete pipes is 7mm~ 15mm is qualified, but due to installation, raw materials, construction, natural factors, human factors, equipment factors and other reasons, the actual longitudinal gap between nozzles may not be within the above standard range, too large or too small Longitudinal gaps may cause problems such as pipeline leakage and sealing ring failure, which may seriously cause water leakage and cause the surrounding soil matrix to be washed away, resulting in road subsidence and the danger of landslides

In routine acceptance, the post-inspection scheme is usually adopted, that is, after a group of pipeline connections are completed, the quality personnel will conduct a full inspection or random inspection of the longitudinal gaps at the pipeline connections. Dismantling the connected pipes and re-docking will waste a lot of time, and after the inspection, only whether the longitudinal gap of the interface part meets the requirements can be given, and it will not contribute to the problem of how to improve the docking so that it meets the requirements. The workers only It can be re-docked based on experience, and the pass rate of the docking result is still unpredictable

Images