RU2584093C1 - Stand for testing cable couplings of submersible electric motors - Google Patents

Abstract

FIELD: cable technology.

SUBSTANCE: invention relates to tests of metal structures and can be used in cable engineering for estimation of serviceability of submersible electric motors cable couplings. Test bench for tests of cable couplings comprises heat chamber with cover accommodating tested coupling. Heat chamber is divided by piston into upper and lower cavities, to upper cavity pipeline is connected for pumping salt solution, and to lower cavity and to inner cavity of tested coupling oil supply pipelines are connected. Pipeline for salt solution pumping and oil feed pipeline connected to inner cavity of tested coupling are connected via distributor and are equipped with individual pressure gauges and common differential pressure gauge. Cable coupling is mounted into plug fixed in cover.

EFFECT: technical result is possibility of testing cable couplings on pressure drop at high temperatures and in presence of aggressive medium.

3 cl, 2 dwg

Description

The invention relates to tests of metal structures and can be used in cable technology to assess the health of cable submersible motor couplings.

From the existing level of technology there is known a test method for the preservation of a set of mounting parts (KMD) for the installation of couplings of communication cables, including optical, including cyclic exposure to KMD temperature of 67-73 ° C and relative humidity of 60-80% with a duration of one cycle t _AND defined for a part from the CMD with the lowest activation energy of the material according to a certain formula, and an estimate of the retention time by the number of cycles during which the coupling did not fail, and one cycle is equal to one year of storage emosti KMD [Patent №2188405 RU, G01M 19/00, 11/00, 2002].

There is also a method of testing the clutch of optical cables for service life, which includes the temperature effect on the clutch, followed by a check for leaks and determining the attenuation in the optical fiber. For testing, the clutch is placed in a heat chamber equipped with a sealed cover [patent No. 2187791 RU, G01M 11/02, 2002].

The disadvantages of the known methods is the inability to test the designs of cable couplings for differential pressure at high temperatures and in aggressive environments.

The present invention is to develop a method and test bench cable couplings for differential pressure at high temperatures and in the presence of an aggressive environment.

The specified technical result is achieved by the fact that in the test bench of cable couplings of submersible electric motors containing a heat chamber with a cover in which the tested coupling is located, according to the invention, the heat chamber is divided by a piston into the upper and lower cavities, a pipeline for injecting saline is brought to the upper cavity, and to the lower cavities and pipelines for supplying oil are connected to the internal cavity of the tested coupling, while the pipeline for injecting saline solution and the pipeline for supplying oil, connected to the internal cavity of the tested coupling, are connected through a distributor and equipped with individual pressure gauges and a common differential pressure gauge, and the cable sleeve is mounted in a plug fixed in the cover.

To facilitate assembly, the cork is fixed in the lid with a petal hook formed between their mating side surfaces. In this case, the cover can be equipped with rotary handles.

In FIG. 1 shows a General view of the proposed stand, side view; in FIG. 2 is a top view of the cork and the lid of the heat chamber.

The test bench for cable couplings of submersible electric motors contains a heat chamber 1 with a cover 2, in which a plug 3, a distributor 4 and a pump 5 for pumping oil are fixed. A piston 6 is located inside the body of the heat chamber 1, dividing the chamber into an upper test cavity 7 and a lower cavity 8. A pipe 9 for injecting saline solution is connected to the upper cavity 7. The test cable sleeve 10 is mounted at the bottom of the plug 3. The internal cavity 11 of the sleeve 10, located inside the plug 3, is connected through a channel 12 to a pipe 13 for supplying oil, which is connected to the pump 5.

The heat chamber 1 is connected to the distributor 4 through a pipe 13 for supplying oil and a pipe 9 for injecting saline. The distributor 4 has a salt solution channel 14, an oil channel 15, an oil pressure gauge 16, a salt solution pressure gauge 17, a differential pressure gauge 18.

The pump 5 is connected to a tee 19, on which a valve 20 is connected, connected through the tube 21 to the oil channel 15, and a valve 22, which regulates the flow of oil into the lower cavity 8 through the tube 23 into the hole 24 in the housing of the heat chamber 1.

The cork of the chamber 3 and the lid of the chamber 2 has petals 25 for fixing by the type of petal engagement. On the lid 2 mounted rotary arms 26 and latches 27. The latter exclude the rotation of the plug 3.

The design of the stand allows you to simulate operating conditions during the testing of cable couplings. The presence of the petals 25 on the plug 3 and on the cover 2, the latches 27 and the handles 26 provides a quick installation of the plug 3 with a cable sleeve 10 without disassembling the rest of the design.

The test bench works as follows.

To create conditions similar to operational, in the upper test cavity 7, before starting the tests, a saline solution of a given temperature is pumped through pipeline 9. Then turn on the pump 5, which delivers oil through the tee 19, where one stream goes through an open valve 20, a pipe 21, an oil channel 15, a pipe 13, a channel 12 and enters the internal cavity 11 of the coupling 10, and the second stream - through an open to the crane 22 through the tube 23 and the hole 24 moves into the lower cavity 8. Under the action of the incoming oil, an increase in pressure is created on the cable sleeve 10 from the side of its internal cavity 11, and under the influence of increasing pressure in the lower cavity 8, pressure increases when the piston 6 moves the outer side of the cable box 10, located in the cavity 7 of the test.

First, the valve 20 is closed, and the pressure increase in the inner cavity 11 of the clutch 10 stops increasing, while in the lower cavity 8 under the piston 6 the pressure continues to increase, resulting in a pressure drop that is recorded by differential pressure gauge 18. When the valve 22 is closed, and the valve 20 is left open, the pressure increase in the lower cavity 8 ceases to increase and a new pressure drop is recorded, recorded by a differential pressure gauge. After exposure to differential pressure, the clutch housing 10 is checked for leaks and integrity. In the case of depressurization at a pressure differential, the saline and oil pressure gauges will begin to tend to show the same value (the same pressure), and the differential pressure gauge will begin to show a drop in its value to zero.

When the stand is running, the pump uniformly creates pressure in the inner cavity 11 of the coupling and in the upper cavity 7 of the heat chamber due to the formation of pressure in the lower cavity 8 under the piston 6.

After one of the valves is shut off, a different pressure drop can be achieved acting on the cable box housing. When one valve is closed and the second is left open, pressure increases only in one of the coupling cavities; the overlap of the second valve when the first valve is open causes an increase in pressure in another cavity at a constant pressure in the first cavity.

The presence of a separate test cavity 7 in the heat chamber allows the use of saline solutions similar in composition to the well solutions as a medium. For the manufacture of heat chambers, a material is used that allows the use of salt and oil mixtures heated to the operating temperature of the cable box. Due to this, it is possible to carry out tests for tightness and integrity of the cable box housing by differential pressure at high temperatures.

Thus, the proposed design is technologically advanced due to its compactness and the presence of simple assemblies, which guarantees reliable operation of the bench at high inlet pressures, and is easy to use due to the petal mechanism of the cork and lid.

Claims (3)

1. A test bench for cable couplings of submersible electric motors, comprising a heat chamber with a cover in which the test coupling is located, characterized in that the heat chamber is divided by a piston into the upper and lower cavities, a pipeline for injecting saline is brought to the upper cavity, and to the lower cavity to the inner cavity the cavities of the tested coupling are connected pipelines for supplying oil, while the pipeline for injecting saline solution and the pipeline for supplying oil connected to the internal cavity of the tested coupling are connected through es valve and equipped with individual gauges and common differential manometer, and cable box is mounted to a stopper fixed in the cover. 2. The stand according to claim 1, characterized in that the cork is fixed in the lid with the help of a petal hook formed between the mating side surfaces. 3. The stand according to claim 1, characterized in that the lid is equipped with rotary handles.

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