8 results about "Pipe bursting" patented technology

The application discloses a method for evaluating the residual strength of a pipeline with corrosion defects under blasting vibration, and belongs to the technical field of oil and gas pipeline safety evaluation. In view of the problem that the traditional method only considers the corrosion geometric thinning and ignores the material dynamic performance degradation and spatial non-uniform distribution, leading to distorted evaluation, the application reconstructs the corrosion morphology based on detection data, constructs a corrosion damage variable, calibrates the damage-strain rate-material parameter mapping relationship through a mechanical test, establishes an explicit dynamic model of a pipeline-defect-soil-blast source, realizes non-uniform assignment of material performance in the corrosion area by using the UMAT subprogram of LS-DYNA, obtains stress, strain and damage state through nonlinear dynamic analysis, and completes the residual strength evaluation. The application couples the geometric defects and material degradation effect for the first time, greatly improves the evaluation accuracy and engineering applicability, and provides support for the safety control of pipeline blasting construction.

The invention relates to a pipeline pressure testing technology, and aims to provide a pipe-diameter-variable pipeline bursting test sealing device. The device comprises sealing structures installed at the two ends of a to-be-detected pipeline respectively, and each sealing structure comprises a nested fixing assembly and a composite sealing structure. The nested mounting assembly comprises an end cover, a reducing ring and a plug, the composite sealing structure comprises an elastic sealing ring and a deformable conical surface annular ring which are arranged on the plug in a sleeving mode. The conical surface annular ring is adaptively embedded in the wedge-shaped space, and the annular conical surface of the conical surface annular ring is attached to the conical surface transition between the two steps; the elastic sealing ring is located on the outer side of the conical surface annular ring and connected with the inner cavity space of the to-be-detected pipeline. According to the invention, frequent replacement of a loading piece of a testing machine according to the change of the size of the to-be-tested pipeline in a traditional testing scheme can be avoided; by means of the mechanical sealing joint instead of a welding structure, the sealing performance can be greatly improved, and more reliable self-tightening sealing under high pressure is achieved.

The utility model discloses a composite steel reinforced coiled plastic continuous pipe which comprises a medium transmission layer, a polyester composite layer is arranged on the outer layer of the medium transmission layer, a steel wire reinforced layer is arranged on the outer layer of the polyester composite layer, and a protective layer is arranged on the outer layer of the steel wire reinforced layer. According to the continuous pipe, the terylene isolation layer is added between the medium transmission layer and the steel reinforcement layer for composite reinforcement, a prepreg tape surface heating and circumferential compression roller device is added, the temperature resistance and strength of the medium transmission layer are improved, the interlayer welding and compact strength are improved, and the problems that the inner pipe is softened, deformed, expanded and embedded into the reinforcement layer, so that the winding angle is changed, the structure is damaged and the service life is prolonged are solved. The coiled tubing has the advantages of being high in ring stiffness, good in rigidity, capable of being coiled, resistant to corrosion, resistant to external pressure, resistant to bending, resistant to torsion, resistant to stretching, resistant to compression and the like.

The present disclosure relates to a method and system for city lifeline pipeline burst prevention based on an IoT large model. The method includes: obtaining fluid pressure data; determining a pipe burst probability of a pipeline network node based on the fluid pressure data; and determining a target valve and a valve opening degree of the target valve based on the pipe burst probability, and controlling the target valve to the valve opening degree.

A compact, open path cable pulling apparatus, having a low center of gravity, composed of two detachable, single person hand-portable components, and useful in either a vertical or horizontal configuration. The apparatus is competent to pull cable horizontally through space underground with a pulling force in the range of at least about 20 to 100 tons using low pressure flow hydraulics and has utility in the cable pulling industries, including in the drilling and horizontal directional drilling industries, and as part of a method for pulling cable through space, including pulling cable through space in the pipe bursting and trenchless pipe replacement industries.

This utility model discloses a pipe clamp with overload protection function, belonging to the field of pipe clamp technology. It includes a top block, a middle block, and a bottom block. The middle block is provided with a first locking seat on both sides and a second locking seat on the other two sides. The top block is provided with an upper locking seat on both sides and the bottom block is provided with a lower locking seat on both sides. An upper positioning hole is provided between the top block and the middle block, and a lower positioning hole is provided between the bottom block and the middle block. This utility model, through a modular three-block structure (top block, middle block, and bottom block) and a multi-directional locking seat design, achieves synchronous fixing of pipelines at multiple angles, greatly improving space utilization. Furthermore, through the overload protection structure, a three-stage spring system (butterfly spring and wave spring working together) can absorb high pipeline expansion. When the pressure exceeds the threshold, a buffer mechanism is automatically triggered, effectively reducing the risk of pipe bursting.

This application discloses a building electromechanical installation structure and installation method based on BIM technology, relating to the field of building installation. It includes a building electromechanical installation structure based on BIM technology, comprising a pipe body with a liquid flow channel penetrating the pipe body. The pipe body has a sliding hole penetrating the pipe body to the liquid flow channel, and a sliding block sliding on the sliding hole, the sliding direction of the sliding block being the through direction of the sliding hole. The pipe body is provided with a protective cylinder, which is sleeved on the outer wall of the pipe body, and a clearance groove is provided on the inner wall of the protective cylinder. With the sliding block and clearance groove, in actual use, when the internal pressure of the liquid flow channel increases, the air pressure in the clearance groove does not change. Subsequently, the internal pressure of the liquid flow channel causes the sliding block to move towards the bottom of the clearance groove. Due to the increased volume, the internal pressure of the liquid flow channel decreases, reducing the possibility of pipe bursting due to excessive internal pressure, thus making the water supply from the water supply pipe more stable.

The application discloses a stress calculation system and method for a composite material reinforced defective pipeline. Relevant parameters are measured; the hoop stress of a pipeline matrix defect area, the hoop stress of a filling material, the hoop stress of a composite material, the axial stress of the pipeline matrix defect area and the axial stress of the composite material in an elastic stage of the composite material reinforced defective pipeline are calculated; the pressure when the pipeline matrix yields is calculated; the hoop stress of the pipeline matrix defect area, the hoop stress of the filling material, the hoop stress of the composite material, the axial stress of the pipeline matrix defect area and the axial stress of the composite material after yielding are calculated; and the burst pressure is calculated. The method considers the elastic-plastic constitutive relationship before and after the pipeline matrix yields, and can accurately calculate the hoop stress and the axial stress of the pipeline matrix, the filling material and the composite material in the whole process from no load to pipeline burst. The method is simple, and has high operability, and the accuracy of the calculation of the ultimate internal pressure bearing capacity is improved.