Double-tray extension tube joint

The utility model relates to the field of pipeline engineering, in particular to a coupling pipe joint with telescopic function for socketing and inserting pipeline plugs.

In today's rapid industrial development, water, coal, oil, etc. are inseparable from pipeline transportation projects, and the meters or valves in these pipelines are subject to certain temperature, pressure, and corrosion by the medium, making them often If it is damaged or needs to be replaced, two methods are generally used now. One is to remove the packing ring of the socket near the meter or valve to make the pipeline produce axial clearance. The other is to cut off the pipeline at both ends of the meter or valve so that the meter or valve can be Withdrawing or putting in, these two methods not only require the use of multiple tools, but also take a long time, greater labor intensity, and high cost. In addition, if the filler is used as a lead filler, the operation has certain effects on the human body. Therefore, it is difficult to guarantee the construction quality in practice.

The purpose of the utility model is to provide a method for reducing mechanical equipment and electric energy, with short time, stable quality, low cost, and low labor intensity, and by adjusting the length of the pipe joint, a certain gap is created in the pipeline to make the adjustment of the instrument or valve a process. Fast and convenient socket expansion pipe joints.

The technical scheme of the utility model is: adopt double-split inserts and double-split seats through packing gland, filler and tight female parts. The structure of double-split inserts is that a flange is set on the left end surface and the outer side on the right side is a A cylinder with a certain length, the outer side of the cylindrical surface is sleeved with a packing gland with 15 flange faces, and the right side of the cylindrical surface of the packing gland (2) is sleeved with a packing circle, and the right end is double-inserted and the right end sleeve is connected to one or two end faces. Both flanges are equipped with double seat, the packing gland is connected with the adjacent flange of the double box with fasteners, and it is ensured that the right end surface of the double box insert and the left inner end surface of the double seat have a certain gap. The spliced flange is connected with the pipeline. By adjusting the fasteners, the double-split seat and the packing gland can be moved. The double-split seat and the instrument or valve are connected with fasteners. When the instrument or valve is to be repaired, just loosen a flange on the pipe joint Bolts, remove the fasteners connecting the valve or the instrument, the length of the telescopic tube can be shortened, the length can be the gap A, and then the valve and the instrument can be taken out or put into the valve and the instrument, and connected with the fastener, and then connect the packing gland and Shuangpin The fasteners of the seat can put the pipeline into operation.

The utility model has the advantages of simple structure, low cost, reliable performance, convenient use and the like.

Figure 1 is a schematic diagram of the structure of the utility model.

The best embodiment of the present invention will be described below in conjunction with the drawings.

A double-disc telescopic pipe joint is composed of double-split (1) fasteners (4) and packing (3), and is characterized in that the structure of the double-split (1) on the left is: a flange surface (6) is set on the left end surface. ), the outer side on the right side is a cylindrical surface (7) with a certain length, a packing gland (2) with a flange surface is sleeved on the outside of the cylindrical surface (7), and the right side cylinder of the packing gland (2) A packing ring (3) is sleeved on the surface (7), and the right end of the cylindrical surface (7) is sleeved with a double seat (5) with flanges on one and both sides, a packing gland (2) and a double seat (5) Adjacent flanges are connected with fasteners (4), and a certain gap should be maintained between the right end surface of the double-piece plug (1) and the left inner end surface of the double-piece seat (5).