RU2805006C1 - Device for reducing residual stress - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to ultrasonic treatment of welded pipeline joints. The housing is made in the form of a divided hollow cylinder, at the ends of which connecting elements are made as a single unit in the form of a divided hollow cylinder of a smaller diameter than the housing; holes are made in the side surface of the connecting elements for installing a bolted connection; oscillatory systems are rigidly installed on the surface of the housing in a checkerboard pattern, a gasket for a sealed connection is fixed around the perimeter of each of the halves of the housing, inside of which a battery pack is installed, the output of which is connected to the input of the inverter, the output of which is connected to the input of the control unit, the output of which is connected to the input of the odometer, the output of which is connected to the input of the ultrasonic generator, the output which is connected to the input of the oscillatory systems.

EFFECT: reduction of residual welding stresses in the heat-affected zone of a main pipeline.

1 cl, 6 dwg

Description

The invention relates to the oil and gas industry in the field of ultrasonic processing of welded joints of pipeline pipe joints and can be used as a device for reducing residual welding stresses in the heat-affected zone of a main pipeline.

A device for ultrasonic processing of a joint during welding is known (patent RU No. 2469108, published on December 10, 2012) , containing a torch with an electrode, an ultrasonic magnetostrictive emitter, an ultrasonic generator connected to a computer, capable of processing data on the amplitude of the welded joint entering the metal ultrasound and transmitted to an ultrasonic magnetostrictive emitter.

The disadvantage of this device is the presence of a torch with an electrode and an ultrasonic magnetostrictive emitter, which processes only the outer surface of the pipe, which makes it impossible to use this device after insulation and laying work on the main pipeline.

An ultrasonic device for processing welded joints of austenitic metals in the process of automatic welding is known (patent RU No. 2469109, published on December 10, 2012) , containing an ultrasonic transducer configured to carry out the influence of ultrasound on metal in the heat-affected zone during automatic welding.

The disadvantage of this device is the presence of a transducer designed to carry out the influence of ultrasound on metal in the heat-affected zone during automatic welding, which makes it impossible to use this device after insulation and laying work on the main pipeline.

An ultrasonic instrument for relieving residual stresses and strengthening metal surfaces is known (patent RU No. 2252859, published on May 27, 2005), containing an acoustic system in the form of a magnetostrictive transducer installed in a housing, which is connected to a concentrator and an ultrasound emitter.

The disadvantage of this device is the presence of an acoustic system in the form of a magnetostrictive transducer installed in the housing, which is connected to a concentrator and an ultrasound emitter, which makes it impossible to use this device after insulation and laying work on the main pipeline.

An ultrasonic tool for deformation treatment of surfaces and welded joints is known (patent RU No. 2540230, published on February 10, 2015), containing a housing with a handle and sliding guides, in which a glass with a nozzle is installed with the possibility of axial reciprocating movement, in which, through vibration-isolating seals the nodal plane is fixed to an ultrasonic transducer connected to an oscillatory velocity transformer, temperature sensors and position sensors of the cup relative to the body and a forced air cooling system of the converter due to the supply of compressed air to the end of the cup and outlet in the area of the output end of the speed transformer, with which the ends of the strikers, installed with the possibility of reciprocating movement in the holder, fixed with a cylindrical end to the nozzle with the possibility of rotation and quick removal, while the movement of the glass is limited by a pin fixed on the glass, placed in the longitudinal groove of the body and pressed to the leading edge of the groove by a spring placed between the formed on glass with a flange and the end surface of the body with the possibility of displacing the glass when pressing on the strikers.

The disadvantage of this device is the presence of a body with a handle and sliding guides, in which a glass with a nozzle with the possibility of axial reciprocating is installed, which makes it impossible to use this device after insulating and laying work on the main pipeline.

An ultrasonic device for relieving residual stresses in welded joints is known (patent RU No. 87380, published on October 10, 2009) , containing a source of ultrasonic vibrations, a welding process control unit, having a sensor-connected circuit for monitoring and protecting permissible deviations of welding parameters, and also connected to control unit and automatic welding machine; electric arc power source.

The disadvantage of this device is the presence of a source of ultrasonic vibrations, a control unit for the welding process, which has a sensor-connected circuit for monitoring and protecting permissible deviations of welding parameters, as well as an electric arc power source connected to the control unit and the automatic welding machine, which makes it impossible to use this device after insulating -laying works on the main pipeline.

An ultrasonic flaw detector for non-destructive testing is known (patent RU No. 2224247, published on February 20, 2004) adopted as a prototype, containing a series-connected voltage source, an exciting pulse generator, a transceiver-receiver ultrasonic transducer, as well as a control circuit and a series-connected receiver-amplifier path and a measured data processing unit .

The disadvantage of this device is the presence of a control unit for measured data and an exciting pulse generator, which makes it impossible to use this device after insulation and laying work on the main pipeline.

The technical result is the reduction of residual welding stresses in the heat-affected zone of the main pipeline.

The technical result is achieved in that the housing is made in the form of a divided hollow cylinder, at the ends of which connecting elements are made as a single unit in the form of a divided hollow cylinder of smaller diameter than the housing, holes are made in the side surface of the connecting elements for installing a bolted connection, on the surface of the housing in The oscillatory systems are rigidly installed in a checkerboard pattern, a gasket for a sealed connection is fixed around the perimeter of each of the halves of the housing, inside of which a battery unit is installed, the output of which is connected to the input of the inverter, the output of which is connected to the input of the control unit, the output of which is connected to the input of the odometer, the output of which is connected with the input of an ultrasonic generator, the output of which is connected to the input of the oscillatory systems.

The device is illustrated by the following figures:

fig. 1 - general view of the device;

fig. 2 - 3D model of the device;

fig. 3 - side view of the device;

fig. 4 - half of the device body;

fig. 5 - device inside the main pipeline;

fig. 6 - block diagram of the device, where:

1 - pipeline;

2 - body;

3 - connecting element;

4 - oscillatory systems;

5 - battery pack;

6 - inverter;

7 - control unit;

8 - odometer;

9 - ultrasonic generator;

10 - holes;

11 - gasket for a sealed connection;

12 - bolted connection.

The device for ultrasonic processing of welded joints consists of a housing 2 (Fig. 1-4), which consists of two parts, which are made in the form of a divided hollow cylinder. On the surface of the housing 2, oscillatory systems 4 are rigidly installed in a checkerboard pattern. At the ends of the housing 2, the connecting elements 3 are made as a single unit in the form of a divided hollow cylinder of smaller diameter than the housing 2. In the side surface of the connecting elements 3 there are holes 10 (Fig. 4) for installing a bolted connection 12 (Fig. 4) of the housing 2. The gasket for a sealed connection 11 is made, for example, of rubber and is fixed around the perimeter of each of the halves of the housing 2.

Inside the housing 2 (Fig. 5, 6) a battery unit 5 is installed, the output of which is connected to the input of the inverter 6. The output of the inverter 6 is connected to the input of the control unit 7. The output of the control unit 7 is connected to the inputs of the odometer 8. The output of the odometer 8 is connected to the input of the ultrasonic generator 9. The output of the ultrasonic generator 9 is connected to the input of the oscillatory systems 4.

The device works as follows. Before installation, the battery pack is charged and then installed in housing 2. After this, the device is installed in the launch chamber. The launch chamber is filled with natural gas, and the pressure is equalized with the pressure in the main pipeline, and then, by opening the valve, it is launched into the inner part of pipeline 1.

The control unit 7 is given a command to start work remotely from the remote control. The control unit gives a signal to the odometer input 8 about the start of reporting the distance that the device travels in the pipeline 1 to the heat-affected zone. When the device has entered the heat-affected zone, the control unit 7 gives the command to turn on the input of the ultrasonic generator 9, after which the processing of the internal heat-affected zone of the welded joint begins using oscillatory systems 4. After passing the entire length of the main pipeline 1, the device enters the receiving chamber. A command to stop operation is sent to the control unit 7 from the remote control. Then it is removed from the receiving chamber.

Claims (1)

A device for reducing residual welding stresses, including a voltage source, an ultrasonic transducer, characterized in that the housing is made in the form of a divided hollow cylinder, at the ends of which connecting elements are made as a single unit in the form of a divided hollow cylinder of smaller diameter than the housing, in the side surface of the connecting elements holes are made for installing a bolted connection, oscillating systems are rigidly installed on the surface of the housing in a checkerboard pattern, a gasket for a sealed connection is fixed around the perimeter of each of the halves of the housing, inside of which a battery unit is installed, the output of which is connected to the input of the inverter, the output of which is connected to the input of the control unit , the output of which is connected to the input of the odometer, the output of which is connected to the input of the ultrasonic generator, the output of which is connected to the input of the oscillatory systems.