RU2039904C1 - Method of assembly of receiving and starting chambers of flow devices into pipe lines - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: first, end gate is assembled and prepared; then gate provided with technological branch pipe is welded to housing of chamber. After assembly, gate is welded to hydraulic test stand. Upon completion of tests, gate is cut off stand and ends of branch pipe are prepared for welding at the Manufacturing plant. Welding the branch pipe to housing is effected under field conditions. Diameter of branch pipe shall correspond to diameter of chamber and its length shall be no less than 400 mm. EFFECT: enhanced reliability. 2 cl, 3 dwg

Description

 The invention relates to pipeline transport and can be used in the assembly of reception and launch chambers for periodic passage through the main pipelines of cleaning pistons, profilers, flaw detectors and other flow devices.

 A well-known typical assembly process of apparatuses [1] includes assembling with bolts of a flange cover with a shell flange, welding a flange shell to an all-welded cylindrical body, followed by hydrotesting in the factory according to sections 4-7 of the Gosgortekhnadzor rules for the entire apparatus. The disadvantage of this method is the inability to reconstruct the cameras in the field and the need to deliver the entire camera to repair the flange shutter to the plant.

 Closest to the technical nature of the present invention is a process [2] of assembling devices for receiving and starting cameras in a block-complete design of type BK, including assembling an end shutter by connecting the cap to the flange and the pipe to the flange through the sealing ring with two clamps with coupling bolts, welding the end shutter in the factory to the camera body, welding the two chambers together and hydrotesting them according to the instructions and sections 4-7 of the rules of the Gosgortekhnadzor.

 The disadvantages are the same: the inability to reconstruct and repair the cameras in the field, the difficulty of transporting the cameras for repairs to the factory.

 The invention solves the problem of simplifying assembly and transportation by providing the ability to assemble cameras in the field, reusing the camera body during reconstruction by replacing the end shutter.

 The essence of the method lies in the fact that the assembly of the reception chambers and the start-up of flow devices in pipelines, including the assembly and preparation for welding of an end valve equipped with a process pipe, is carried out in the factory in the sequence: assembly of an end valve is welded to a test bench for hydraulic testing of the shutter of a segment the shutter from the stand processing for welding the technological shell of the flange, and the welding of the end shutter pipe to the camera body is carried out in the field, and use a nozzle with a diameter corresponding to the diameter of the chamber and a length of at least 400 mm in order to exclude the thermal effect of welding in the field on the flange mirror.

 In FIG. 1 shows an end closure with a nozzle; in FIG. 2 test bench, in FIG. 3 camera without end shutter, general view.

 The method is as follows. The pipe 1 (Fig. 1) of the assembled end shutter 2 is welded by the end 3 to the end 4 of the stand for hydraulic testing (Fig. 2). After hydrotesting, the end of the pipe 1 is cut from the stand along the circumferential seam or in close proximity to it, and then the end face 3 of the pipe 1 for welding is machined (Fig. 1) in the factory on a rotary machine. Next, the end shutter is prepared for storage and transportation for welding the end face 3 to the end face 5 of the body (Fig. 3) of the receiving and starting cameras in the field. In this case, only an annular seam and a test bench designed for repeated use appear, which, after testing, is shortened by the length necessary for cutting the shutter (Fig. 1) and preparing the edge 4 of the stand (Fig. 2) for welding the next shutter (at the same time test two shutters).

 The housing of the receiving and starting chamber of the flow means (Fig. 3) is a heavy thick-walled steel shell 6 with a conical transition 7 with a pipe 8 for connection to the main pipeline, which can be reused after the end shutter fails. Replacing the shutter allows you to reuse the housing of the reception and launch cameras without replacing the entire apparatus. The consumption of high-quality steel is reduced when equipping main pipelines with flow chambers for receiving and launching, during reconstruction of receiving and launching chambers by replacing the end shutter with a more advanced design or repairs.

 Thus, the application of the proposed method of assembly reduces the coefficient of material consumption, reduced transportation costs and labor. In addition, it becomes possible to manufacture reception and launch chambers in assembly sites by supplying factory-made end valves.

 The assembly method is notable for its cost-effectiveness, simplicity of technological solutions and industrial applicability, provided that the Gosgortekhnadzor complies with the rules not only when assembling reception and launch chambers, but also other devices with quick-disconnect hermetically sealed covers.

Claims (2)

 1. METHOD OF ASSEMBLY RECEIVING CHAMBERS AND STARTING FLOW DEVICES IN PIPELINES, including assembly and preparation of the end valve, welding of the end valve equipped with a process pipe to the camera body, characterized in that after assembly the end valve is welded to the test bench after hydraulic tests, after hydraulic testing the shutter is cut from the stand and subjected to processing the ends of the pipe for welding in the factory, and the welding of the end valve to the camera body is carried out in the field.  2. The method according to claim 1, characterized in that they use a pipe with a diameter corresponding to the diameter of the chamber with a length of at least 400 mm

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