CN104458135A - Pipeline pressure testing device and using method - Google Patents

Abstract

The present invention relates to a pipeline pressure testing device and its use method. The device is provided with a pair of plugging cores (1), the plugging cores (1), and one of the plugging cores (1) is provided with a water-filled pressure nozzle (6 ), the two plugging cores (1) are respectively fixed on the support plate (7) by connecting bolts (8), the support plate (7) is provided with a base plate (10), and the support plate (7) passes through the base plate (10) Fix on the chassis (4) by fixing bolts (9), respectively set flexible cables (2) opposite to the two plugging cores (1), and the two ends of the flexible cables (2) are respectively installed on the tensioner (3) , the tensioner (3) is fixed on the chassis (4), and the method of use is: insert the plugging core (1) into the two ends of the tested pipeline (5), and respectively Wrap multiple turns of the flexible cable (2), use the water filling and pressurizing nozzle (6) to fill and pressurize the pipeline to be tested with water through a press, and carry out a pressure test on the pipeline to be tested.

Description

Pipeline pressure test device and method of use

technical field

The invention belongs to the field of measurement technology, and in particular relates to a pipeline pressure test device and a method of use, which can conveniently perform pressure tests on different pipelines.

Background technique

Pipeline pressure test is an experimental work often performed by pipeline production, processing enterprises and construction enterprises. The purpose is to check the quality of pipelines, mainly to check the ability of pipelines to resist internal water (gas) pressure. The currently used monitoring equipment uses clamps of different sizes to seal off both ends of the pipeline according to different pipe diameters. The operation is complicated and time-consuming, especially the manufacturing cost of the fixture for detecting large-diameter pipes is very high, and a set of supporting fixtures for pipes with a diameter of 50 cm is about 80,000 yuan. There are also pressure testing equipment with a high degree of automation, but they are expensive, bulky, and use harsh conditions.

Contents of the invention

According to the current status of pressure testing equipment, especially the detection of large-diameter pipelines is a big problem, the purpose of the present invention is to provide a pipeline pressure testing device and its use method that are easy to operate, fast and do not require clamps, and reduce the cost of testing equipment. The cost is to facilitate the pressure detection of the pipeline. The technical scheme of the present invention is as follows: a pipeline pressure test device is provided with a pair of plugging cores, the plugging cores have a certain length, one of the plugging cores is provided with a water-filled pressure nozzle, and the two plugging cores are respectively connected by connecting bolts It is fixed on the support plate, and the support plate is provided with a foot plate, which is fixed on the chassis by fixing bolts through the foot plate, and the two plugging cores are respectively provided with flexible cables, and the two ends of the flexible cables are respectively arranged on the tensioner , the tensioner is fixed on the chassis. A method of using the pipeline pressure test device described above, the pipeline to be tested is placed on the chassis, the plugging core is inserted into both ends of the pipeline to be tested, the plugging core is fixed on the support plate through the connecting bolt, and the connecting bolt The inner side of the plugging core is sealed with gaskets, and the bracket plate is fixed on the chassis through the fixing bolts and the footing plate. The positions of the plugging cores at both ends of the pipeline to be tested are respectively wrapped with multiple turns of flexible cables. Tightened by the tensioner, under the tension of the cable, the pipeline to be detected is compressed and clings to the plugging core. Under the action of the plugging core at both ends and the flexible cable, the volume in the pipeline to be detected becomes one In a confined space, on one side of the plugging core, use a water-filling pressurization nozzle to connect a water-filling pressurized pipe, and use a press to fill the pipe with water and pressurize it to carry out a pressure test on the pipe. Under the action of the flexible cable, the pipeline is evenly compressed radially onto the plugging core, thereby achieving the purpose of sealing. It is worth pointing out that this device and method are only effective for pipelines with a small elastic modulus of the pipeline material, and are not suitable for pipelines of steel pipes, concrete pipes and other similar materials.

The invention is convenient and quick to operate, does not need fixtures, reduces the cost of test equipment, and facilitates the pressure detection of pipelines.

Description of drawings:

Fig. 1 is a structural schematic diagram of the present invention.

In the figure, 1. Plugging core; 2. Flexible cable; 3. Tensioner; 4. Chassis; , fixing bolt, 10, base plate.

Detailed ways:

Referring to the accompanying drawings, the technical scheme of the present invention is as follows: a pipeline pressure test device is provided with a pair of plugging cores 1, the plugging cores 1 have a certain length, and one of the plugging cores 1 is provided with a water-filled pressurizing nozzle 6, The two plugging cores 1 are respectively fixed on the bracket plate 7 by connecting bolts 8, and the bracket plate 7 is provided with a base plate 10, which is fixed on the chassis 4 through the base plate 10 by fixing bolts 9, and opposite to the two plugging cores 1, respectively The flexible cable 2 and the two ends of the flexible cable 2 are respectively arranged on the tensioner 3 , and the tensioner 3 is fixed on the chassis 4 . The flexible cable 2 is a steel wire or a steel wire rope, and the tensioner 3 can be a lead screw.

A method of using the pipeline pressure test device described above, the pipeline to be tested is placed on the chassis 4, the plugging core 1 is inserted into both ends of the pipeline to be tested 5, and the plugging core 1 is fixed on the support plate 7 by connecting bolts 8 Above, the connecting bolt 8 is added with a gasket to seal liquid inside the plugging core 1, the bracket plate 7 is fixed on the chassis 4 through the foot plate 10 and the fixing bolt 9, and the plugging core is provided in the two ends of the pipeline 5 to be tested. Wrap multiple coils of flexible cable 2 on each position, and tighten them with tensioner 3 on both sides. Under the tension of flexible cable 2, the pipeline 5 to be detected is compressed and clings to the plugging core 1. Under the action of the plugging core 1, the flexible cable 2 and the support plate 7, the volume in the detected pipeline 5 becomes a closed space. The pressure pipe is connected with the press, and the pipe is filled with water and pressurized by the press, and the pressure test is carried out on the pipe. Under the action of the flexible cable, the pipe is uniformly compressed in the radial direction to the plugging core 1, thereby realizing the sealing the goal of. It is worth pointing out that this device and method are only effective for pipelines with a small elastic modulus of the pipeline material, and are not suitable for pipelines of steel pipes, concrete pipes and other similar materials.

According to the inner diameter of the pipeline to be tested, a certain length of plugging core 1 is processed, and the outer diameter of the plugging core 1 is equal to or slightly larger than the inner diameter of the pipeline to be tested. The pipe with larger diameter can be made of steel pipe with thicker wall, and the pipe with smaller diameter can be made of round steel (it can also be made of other materials, as long as the compressive strength meets the requirements). The diameter of the plugging core is required to be processed accurately. The flexible cable can adopt steel wire.

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Claims (2)

1. A pipeline pressure test device, characterized in that: the device is provided with a pair of plugging cores (1), one of which is equipped with a water-filled pressure nozzle (6), and two plugging cores ( 1) Use the connecting bolts (8) to fix on the support plate (7), the support plate (7) is provided with the foot plate (10), and the support plate (7) is fixed by the fixing bolts (9) through the foot plate (10) On the chassis (4), flexible cables (2) are arranged opposite to the two plugging cores (1). ) is fixed on the chassis (4). 2. A method of using the pipeline pressure test device according to claim 1, characterized in that: the pipeline to be tested is placed on the chassis (4), and the plugging core (1) is inserted into the pipeline to be tested (5) At both ends of the plugging core (1), the plugging core (1) is fixed on the support plate (7) through the connecting bolts (8). The footing plate (10) is fixed on the chassis (4) by fixing bolts (9), and the positions where the plugging cores are provided in the pipes at both ends of the pipe to be tested (5) are respectively wrapped with multiple turns of flexible cables (2), Both sides are tightened by tensioner (3), under the tension of the flexible cable (2), the pipeline to be detected (5) is compressed and clings to the plugging core (1), and the plugging core is plugged at both ends Under the action of (1) and the flexible cable (2), the volume in the pipeline to be detected (5) becomes a closed space, and on one side of the plugging core (1), the water-filled pressurizing nozzle (6) is used to connect The water-filled and pressurized pipe is connected with the press, and the pressure test is carried out on the tested pipeline by filling water and pressurizing the tested pipeline through the press.