RU2216685C1 - Method of directional control and diagnosis of inoperative main pipe lines and system for realization of this method - Google Patents

Abstract

FIELD: pipe line transport. SUBSTANCE: proposed method includes tele-inspection of object under test by inserting waterproof video camera, type VB21C-R36 or KPC- 290SW withstanding pressure of up to 25 atm; video camera is placed in hermetic titanium at view angle of 92 dg. and is protected by polished glass, type K8, 15 mm thick at bending strength about 17.0 Mpa; it is provided with halogen lights and is mounted on horizontal platform made from conifer wood bars impregnated in boiling industrial oil at distance of 5-15 cm from front edge over center line; said platform is 80 mm thick; ratio of length to width is equal to 3:1 and ratio of volume to diameter of pipe line is equal to 1:4; platform is moved on four wheels: two front wheel are bladed and are operated by electric motor and two rear wheels are supporting; three-core supply cable which is connected with video camera follows platforms; this cable is provided with double insulation and is used for communication with ground recording digital video camera, type DCR-TRV 17E Sony with 3.5-inch monitor; information received by ground video camera is accompanied by comments through microphone. Besides that, proposed system includes video camera, type VB21C-R36 or KPC-190SW in titanium hermetic case at view angle of 92 deg. , halogen light sources at power of 5-10 W, digital recording video camera, type DCR-TRV17E Sony with 3.5-inch monitor, horizontal platform made from conifer wood bars impregnated in boiling industrial oil and provided with propulsor, drum with three-core supply cable provided with double insulation and distance marks, guide roller for cable and self-contained DC 12-V current source (storage battery). EFFECT: enhanced efficiency of inspection of pipe lines. 3 cl, 3 dwg

Description

 The invention relates to pipeline transport and can be used for routine inspection and diagnosis of horizontal idle pipelines that are not filled with liquid products or partially (slightly) filled with them.

 A known method of inspection of pipelines not filled with liquid products or partially filled with them, as well as a device for its implementation (WO 94/05989, class F 17 D 5/00, 1994).

 The method is characterized by the complexity of the implementation, does not ensure the efficiency of the survey and is associated with the use of bulky equipment.

The proposed method and system for its implementation are aimed at eliminating these disadvantages. It allows you to relatively quickly conduct a survey of trunk pipelines, does not require large expenditures of time and labor. The invention is as follows:
A horizontal platform (Fig. 1-3 pos. 1), on which a waterproof video camera (Fig. 1-3 pos. 2) is located, located on the center line of the platform at 5, is inserted into the main pipeline, which is not filled with liquid products or partially filled with them. -15 cm from its front edge.

 The platform is made of softwood bars soaked in boiling industrial oil, such as transformer oil. The thickness of the platform is 80 mm, the length refers to the width as 3: 1, and the ratio of the platform volume to the diameter of the examined pipeline is 1: 4. Such ratios ensure the stability of the platform and prevent its hooks during movement along the pipeline. The platform has four wheels, two of which are impeller (Figs. 1-3, pos. 3) driven by an electric motor, and two are supporting (Figs. 1-3, pos. 4). In the absence of liquid products, the platform moves on wheels, and when the pipeline is partially filled with liquid products, the platform floats with paddle wheels.

 As a video camera (Fig. 1-3 pos. 2), a camera of type VB21C-R36 or KRS-190SW in a sealed titanium case (Fig. 1-3 pos. 5) is used. The camera is protected by a special high-strength polished glass of type K8 (GOST 3514-94) with a thickness of 15 mm, the tensile strength of the glass in bending is about 17.0 MPa. To prevent fogging of the camera glass, a moisture-absorbing substance is introduced under it - silica gel or zeolite adsorbent in an amount of 10-20 g.

 Near the camcorder are fixed halogen light sources - three pieces with a power of 5-10 W (Figs. 1-3, pos. 6).

 A three-core power cable with double insulation (Fig. 1-3 pos. 7) is attached to the video camera, which moves after the platform, unwinds from the drum and goes into the pipeline through the guide roller (Fig. 3 pos. 8). The cable has signs of length, which record the location in the pipeline of foreign objects and identified defects. Through the cable, direct current is supplied from an independent current source (battery) with a voltage of 12 V (Fig. 2-3, item 9).

 Information from the video camera moving through the pipeline enters the Sony DCR-TRV-17E Sony digital terrestrial recording video camera with a 3.5-inch monitor or the like (Figs. 2-3, 10) and is accompanied by comments through the microphone.

The weight of all equipment used is 48 kg:
- a drum with a cable (> 120 m) + a waterproof video camera in a hermetic casing with lamps 29 kg;
- power supply (battery) 18 kg (Fig. 2-3 pos. 6);
- recording video camera - 0.7 kg (Figs. 2-3, pos. 10).

The system for implementing the proposed method of route survey and diagnostics of trunk pipelines includes the following elements:
- waterproof video camera type VB21C-R36 or KPC-190SW (Fig.1-3 pos. 2) with halogen light sources with a power of 5-10 W (Fig. 1-3 pos. 6);
- Sony DCR-TRV17E digital recording video camera with a 3.5-inch monitor (Figs. 2-3, item 10);
- a horizontal platform made of bars of coniferous wood soaked in boiling industrial oil (Fig. 1-3 pos. 1);
- a drum (Fig. 2-3 pos. 11) with a three-core power cable with double insulation and having signs of the distance traveled (Fig. 1-3 pos. 7);
- a guide roller for the cable (Fig. 3, item 8);
- an independent DC source (battery) voltage of 12 V (Fig. 2-3 pos. 9).

For a better understanding of the method and system for its implementation, FIG. 1-3, characterizing the proposed method and system for its implementation:
FIG. 1 - platform with mover;
FIG. 2 - a support system for inspection of pipelines in a static state (platform + video camera + cable + drum + battery + ground video camera);
Fig 3 - equipment system in working condition. In working condition, the system is presented earlier.

 The proposed method and system for its implementation are easy to operate and are serviced by one or two employees.

 The following example is provided for a better understanding of the method and system.

 On the territory of the Yaroslavl refinery, a video inspection of an inactive collector was carried out. The purpose of the examination is to identify collector defects. For this, the data method and system were used.

 The order of work was carried out in the following way.

A three-core cable with double insulation, with a VB21C-R36 type video camera attached to it, with a viewing angle of 92 ^{o, is} unwound from a drum with a length slightly exceeding the distance from one collector well to another. The distance between the wells of the collector ranged from 50 m to 384 m. The connector on the drum, connected to a three-core power cable with double insulation, is connected to an independent 12 V current source (battery) by a connecting cable. The video output on the drum, connected to a double-insulated three-wire power cable, is connected to the video input of a Sony DCR-TRV 17E digital terrestrial recording video camera with a 3.5-inch monitor connecting cable. An in-depth video camera in a protective sealed titanium case, protected by a special durable polished glass of type K8 (GOST 3514-94) with a thickness of 15 mm, the flexural strength of the glass is about 17.0 MPa, set on a platform with a mover on four wheels, two of which are vane, and two - supporting, and secured with a metal clamp. The work is performed by two operators. The first operator lowers the platform with the mover through the roller into the collector well by the cable, lowering the cable into the collector at a speed equal to the movement of the platform. In the presence of fluid in the reservoir without movement, the platform floats with paddle wheels. The second operator looks at the monitor of the recording digital camera, recording the video information transmitted from the in-depth video camera, commenting through the microphone (marking the length of the distance traveled, marking the length of the defect found and the description of the defect).

 During the video inspection, lost wells, holes in the walls of the manifold pipes, blockages were discovered. Based on the video material, all defects were eliminated, which normalized the work of the collector.

 The method and system are tested in operation during the period 1998-2002 Over this period, trunk pipelines with a length of about 10,000 m were examined. All identified defects were eliminated, and the elimination of defects and cleaning of pipelines was monitored using the proposed method and system.

Claims (2)

1. A method for routine inspection and diagnostics of inactive horizontal pipelines that are not filled with liquid products or only partially (slightly) filled with them, without flow, which consists in tele-inspection of the object being examined, characterized in that a VB21C type camera is introduced into the pipeline, which is moisture-proof and can withstand pressure up to 25 atm. -R36 or KPC-190SW in a sealed titanium case with a viewing angle of 92 ^o , protected by polished K8 glass with a thickness of 15 mm and with a bending strength of about 17.0 MPa, equipped with halogen mounted on a horizontal platform made of coniferous wood bars soaked in boiling industrial oil at a distance of 5-15 cm from the front edge along its center line, the platform having a thickness of 80 mm and a ratio of length to width of 3: 1, and its volume refers to the diameter of the pipeline as 1: 4, the platform moves on four wheels, two front of which are paddle, powered by an electric motor, and two rear wheels are supporting, and after the platform a three-wire power cable moves ny with a video camera having a double-insulated and allows communication with the terrestrial digital recording type video camera DCR-TRV 17E Sony 3.5 inch monitor or the like, wherein the information delivered to the ground camcorder accompanied commentary via the microphone. 2. A system for examining and diagnosing inactive trunk pipelines using video equipment, characterized in that it includes a VB21C-R36 or KPC-190SW video camera in a titanium sealed enclosure with a viewing angle of 92 ^o , halogen light sources with a power of 5-10 W, digital recording Sony DCR-TRV17E camcorder with a 3.5-inch monitor or similar, horizontal, made of coniferous wood soaked in boiling industrial oil, a platform equipped with a mover, a drum with a three-core power cable, with double insulation and signs of the distance traveled, a guide roller for the cable, an independent 12 V DC source (battery).

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