Aprons used in outsourced pipeline pressure test devices
A pipeline pressure test and outsourcing technology, which is applied in the direction of using liquid/vacuum to measure liquid tightness and measuring the rate of increase and deceleration of fluid, etc., which can solve the problems of inconvenient installation, disassembly, transportation, loud beating noise, and labor high strength issues
Active Publication Date: 2015-09-16
BEIJING MUNICIPAL ENG RES INST
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Problems solved by technology
Disadvantages: When the impact hammer is used to hit the reducing wedge manually, with the insertion of the reducing wedge, the arc radius of the reducing wedge will become larger, and the rebound force of the reducing wedge will be greater when it is hit by the expansion ring. The more laborious the radial wedge, the louder the hitting noise and the higher the labor intensity; since the pipeline pressure test device is placed in the pipeline, it is inconvenient to install, disassemble and transport
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[0015] See figure 2 , Figure 4 , Figure 5a , an apron used in an outsourced pipeline pressure test device, the inner side of the apron 2 is provided with a through-ring groove 21, and it is characterized in that: the apron 2 is an open apron, and elastic tension is provided on both sides of the opening Tie 26, on both sides of the through ring groove 21, there is a through ladder-type leak-proof groove 22 and a pair of inner inlaid slits 23A, 23B and a pair of outer inlaid slits 23C, 23D are arranged at the two ends of the opening. The mouth 23C is provided with a positioning bolt 232, the outer inlaid sub-mouth 23D is correspondingly provided with a positioning hole 234, and the side of the apron 2 is equipped with a water inlet valve 17 and an exhaust valve 16; The sealing rubber strip 24 and the trapezoidal short sealing rubber strip 25 with the butt joint; the trapezoidal long sealing rubber strip 24 is embedded in the trapezoidal leak-proof groove 22, and the rubber ...
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The invention relates to rubber rings used by a coated pipeline pressure testing device. Annular through grooves 21 are formed in the inner sides of the rubber rings 2. The rubber rings are characterized in that the rubber rings 2 are open rubber rings, trapezoid anti-leakage through grooves 22 are formed in the two sides of each annular through groove 21, a pair of inner insetting spigots 23 A, 23 B and a pair of outer inserting spigots 23C, 23 D are arranged at the two ends of the opening of each annular through groove 21, and water inlet valves and exhaust valves are arranged on the side faces of the rubber rings 2. Long trapezoid sealing rubber strips 24 with butt joint spigots and short trapezoid sealing rubber strips 25 with butt joint spigots are further arranged. The long trapezoid sealing rubber strips 24 are inserted in the trapezoid anti-leakage through grooves 22, the rubber rings 2 surround the welding line of a pipeline connector, and are placed from the outside in a surrounding mode, the short trapezoid sealing rubber strips 25 are inserted into the trapezoid anti-leakage through grooves 22 in two sides of the openings to be in butt joint with the butt joint spigots of the long trapezoid sealing rubber strips 24, at the moment, the inner insetting spigots 23 A, 23 B and the outer inserting spigots 23C, 23 D at the two ends of the opening of each rubber ring are made to be in butt joint, and the rubber rings form a whole.
Description
Technical field: [0001] The invention relates to the technical field of pipeline pressure testing, and refers to a sealing rubber ring used in an outsourcing pipeline pressure testing device. Background technique: [0002] At present, the domestic water supply and drainage pipeline pressure test method is to use the sealed pressure test on the welded joint of the pipeline to determine whether the pipeline joint is leaking. Such as Chinese patent CN101561338B pipeline pressure test method and device (see figure 1 ), the specific method is to place a sealing rubber ring 11 in the pipe joint weld seam 12, the outer circle of the sealing rubber ring is provided with a ring-shaped groove 21, and the sealing rubber ring is surrounded by a plurality of bulges with inlaid slits. The expansion ring 13 that is spliced and fixed by screws is supported inside, and then, a reducing wedge 15 is inserted into the socket 14 of the reducing wedge spliced by split expansion rings, and th...
Claims
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IPC IPC(8): G01M3/28
Inventor 郭志援梁丽媛董建王灏
Owner BEIJING MUNICIPAL ENG RES INST