Device for measuring parameters of threaded piping articles

FIELD: measuring engineering.

SUBSTANCE: device comprises light source and light receiver provided with means for processing information. The light source and receiver are made in block that is made of a tube. The scanning unit is provided with two channels optically connected with the tube and system of mirrors, which allow the light to pass from the tube to the outer or inner surface of the article through the channels. The scanning unit is optically connected with the tube so that the optical axis of one of the channels is in coincidence with the optical axis of the tube.

EFFECT: expanded functional capabilities.

8 cl, 1 dwg

 

The invention relates to the field of measuring and control technology and can be used when performing contactless control of quality of manufacturing, and also in the process of preventive inspection of threaded products, for example to control the threaded connections of the pipes used in the installations of the oil and gas industry.

The known device for contactless control of the parameters of the threaded sections of pipe with male thread, using various optical methods of analysis of black and white or diffraction patterns obtained at the position of the light source and photodetector devices on opposite sides of the object. At the same time using various optoelectronic devices, such as coherent light sources (lasers) and photodetector (SU 1288501, 1985; SU 1368629, 1986).

The main disadvantage of known devices is the inability to control the geometric parameters of the internal surface of the threaded pipe part or internal thread.

Closest to the claimed technical solution is the device control parameters threaded pipe section with an external thread that contains the source of the light flux, the receiver of the light flux with the means of information processing and the scanner unit, connected with a coordinate table and the implementation of the tion with the possibility of reciprocating and rotational motion (RU # 19916, 2001).

The specified technical solution provides for the use of triangulation shadow of the method of measuring the geometrical parameters of the profile of the external thread and method of the light spot during the inspection of the inner surface of the threaded pipe part, which is for fixing the shadow and light images used in triangulation methods for calculation of the geometrical parameters, the use of coherent radiation source (laser) and photodetector matrix.

The specified technical solution allows to solve the problem of estimation of geometrical parameters of the outer thread, but it has some significant drawbacks, such as the need for strict orientation of the light beam along the threads to control external thread. This is due to the fact that using the shadow method leads to increased demands for stabilization of controlled items in the measurement process. In addition, the control of the internal diameter of the tubular part with an external thread is essentially impossible, because it is possible only in a limited area adjacent to the pipe end. Moreover, triangulation methods of estimating geometrical parameters of the thread as in the analysis of shadow and light spots, or have limitations on the accuracy of the performed measurements and to control the surface condition of the material p is sirovoi details that is one of the important elements of health threaded connections.

The task, which directed the claimed technical solution is to extend the functionality of the device by providing a control as outer and inner surfaces, to increase the accuracy of the measuring process by reducing the dependence of the accuracy of measurement of parameters of threaded products from the accuracy of its positioning relative to the measuring instrument, as well as in raising awareness of control due to the possibility of determining parameters such as the surface roughness of the thread, the wall thickness of under or over the thread, the alignment thread both ends of the coupling, as well as providing the possibility of automating the process and reducing the time control.

The problem is solved by a device for monitoring the parameters of the threaded tubular products containing the source of the light flux, the receiver of the light flux with the means of information processing and the scanner unit associated with a coordinate table and made with the possibility of reciprocating and rotational motion, which is characterized by the fact that the source of the light flux and the receiver of the light flux with the means of information processing functionally together what s in a single unit, made in the form of conoscope, and the scanner unit made from at least two optically associated with conoscope channels, and a system of mirrors, ensuring the passage of the light flux from conoscope through the channels to the outer or inner surface products. When the scanner unit is optically connected with conoscope so that the optical axis of one of the channels coincides with the optical axis of conoscope. In addition, the scanner unit may be made so that its axis of rotation coincides with the optical axis of one of the channels.

The problem is solved also by the fact that the scanner unit is made in the form connected with a coordinate table via the node rotation of the plug that is installed with the possibility of setting controlled inner and outer surfaces of the product, the teeth of which is maintained open channels, for passing the light flux from conoscope to the outer and inner surfaces of the product, a system of mirrors placed in these channels with the possibility of overlapping channels.

The problem is solved also by the fact that the fork channels optically connected with conoscope so that the axis of the channel of one of its teeth coincides with the optical axis of conoscope, as well as the fact that the axis of rotation of the plug coincides with the optical axis of conoscope. When this mirror is made with the possibility of changing his position.

The task is asaeda the the device for monitoring the parameters of the threaded tubular products supplied blocks alignment and calibration, and the XY table is equipped with a control system that includes modules for linear and circular motion, to provide reciprocating and circular motion of the scanner unit.

In the invention used monoskop known as a device for measuring the linear parameters of different objects, based on the analysis of traces obtained during the passage of the reflected coherent light in duplicateable the crystal (see U.S. patent 6953137, NCI 359/30, U.S. patent 4976504 and EP 0376837 by MCI G 03 H 1/06).

The invention is illustrated by the drawing, which shows the inventive device in the section.

Device for monitoring the parameters of threaded tubulars consists of a scanner unit and tools for information retrieval. Node 1 scan connected through node 2 rotation and a housing 3 with a coordinate table 4, providing reciprocating motion. Tool for information retrieval is executed in the form of conoscope 5, functionally uniting in a single source block and the receiver of the light flux with the means of information processing. Monoskop allows contactless method of measuring parameters of the test object by the focused laser beam, due to which there is no n the need to separate the application of the radiation source and the receiver. Case 3 is rigidly connected with a coordinate table 4, providing reciprocating movement conoscope 5 and node 1 scan relative to the test object 6, is installed on the node-based products, which is not shown. Node 2 rotation provides rotational movement of node 1 scan relative to the test object 6. Node 2 rotation associated with the drive and the necessary control systems of rotation and displacement of node 1 scan (not shown)that provides the latest controlled reciprocating and rotational movement relative to the product.

As one option, the node 1 scan is made in the form of a fork with at least two prongs 7 and 8, which are made open light channels 9 and 10. The system of mirrors 11 and 12 allows passage of the light flux from conoscope 5 through the openings 13 and 14 in the teeth 7 and 8 of the fork to the controlled product 6, or more precisely to its outer or inner surface. Light channel in one of the teeth, for example, channel 10, is made so that its optical axis coincides with the axis of rotation of node 1 and scanning with the optical axis 15 conoscope 5. The longitudinal axis 16 of the product 6 may coincide with the axis of rotation of node 1 scanning and optical axis 15 conoscope 5. Luminous flux from conoscope 5 through the mirror 12 can be napravleno light channel 9 to the outer surface of the test object 6, as shown in the drawing. By changing the position of mirror 12 luminous flux is directed through the channel 10 to the inner surface 6. Thus, the mirror 12 is made movable relative to the optical axis 15 conoscope 5 and has two operating positions, namely the position of the mirror 12 is output from the light flux of conoscope 5, in this case, the luminous flux is directed along the light channel 10 to the inner surface 6. In position (b) mirror 12 overlaps the channel 10 and is installed at an angle to the optical axis 15 conoscope 5 and luminous flux is directed to the outer side of the device 6 through the light channel 9. The mechanism of rotation of the mirror 12 is not shown. Mirrors 11 and 12 is arranged to change its position. The x-y table 4 is also the management system contains modules for linear and circular motion to ensure reciprocating and circular motion of the scanner unit, and blocks alignment and calibration (not shown).

The workflow control parameters threaded tubular products using the inventive device consists of the following steps. Controlled threaded pipe product 6 is fixed in the node-based (not shown).

The node-based and the control device are installed in the immediate vicinity of the Rog from each other. The device is through the use of conoscope allows to obtain a high accuracy of measurement even when the longitudinal axis of the product 6, the axis of rotation of node 1 scan and the direction of the reciprocating motion of node 1 scan offset relative to each other, while in the known devices, when the receiver and the source of the light flux on opposite sides of the product to the accuracy of their positioning are applied stringent requirements.

At the beginning of the measurement device for control is in one extreme position remote from the controlled product that is outside the dimensions of the device and, in fact, node 1 scan. Scanning threaded tubular goods performed in the following sequence.

In the process of measurement of thread parameters of the test object 6 is moved along the longitudinal axis 16 node 1 scan in the direction of the test object 6. During the movement of the coordinate table 4 scans the inner surface 6, if the mirror 12 is in position (a), or its outer surface, if the mirror 12 is in position (b). The drawing shows an example of the time scanning the outer surface of the product 6, when it is at the working position relative to the hardware device in the process control threaded section L product 6.

Then perform a return movement of node 1 scan starting position. During return movement scan the other surface of the product during the translation of the mirror 12 in position (a), because the original was the position (b).

The advantage of the inventive device before all is known is that the measurement accuracy does not depend on the accuracy of the orientation position of the longitudinal axis 16 of the product 6, the axis of rotation of node 1 scan and the direction of reciprocating movement of node 1 and their Pets deviation. The device involves the alignment, but valid and the deviation from it.

Subsequent cycles of scanning the inner and outer surfaces of the test object 6 is carried out by sequential rotation of node 1 scan at a certain angle around the longitudinal axis 16 of the product. Scanning the two surfaces of the test object according to one clipping plane for one cycle of the reciprocating motion and sequential step-by-step rotation of the optical instrument on the 360° provide the ability to create mathematical models of the controlled area of the threaded tubular goods. Thus the mathematical model of the controlled products may be generated when a deviation from the axial location of the test object against the sustained fashion to the optical axis of the claimed device, that allows to reduce the requirements to the positioning of the test object and to automate the verification process.

And software of computer software, which is equipped with the inventive device provides a comparison of the mathematical model of the controlled threaded tubular goods with virtual caliber, made in accordance with GOST specific threaded connection. Qualitative and quantitative comparison of virtual models of caliber and controlled product and is the main end result of the control parameters of threaded tubulars with the use of the claimed device.

This invention can be used to control the complete set of parameters characterizing the quality of threaded connections in accordance with the applicable state Standards. The proposed device allows you to automate the process control to improve the control accuracy, which in turn will increase the reliability of installations using threaded products.

The inventive device can be widely used in industrial production of pipes of various sizes, in particular in the manufacture of casing, drilling and tubing used in oil and hazardrelated. In addition, the invention allows to perform preventive evaluation of the ability of these tubes at the tube bases of drilling and oil and gas industries practically in the field.

1. Device for controlling a threaded tubular products containing the source of the light flux, the receiver of the light flux with the means of information processing and the scanner unit, connected with a coordinate table and made with the possibility of reciprocating and rotational motion, wherein the source of the light flux and the receiver of the light flux with the means of information processing are combined in a single unit, made in the form of conoscope, and the scanner unit made from at least two optically associated with conoscope channels and a system of mirrors, ensuring the passage of the light flux from conoscope through the channels to the outer or inner surface products.

2. The device according to claim 1, characterized in that the scanner unit is optically connected with conoscope so that the optical axis of one of the channels coincides with the optical axis of conoscope.

3. The device according to claim 1 or 2, characterized in that the scanner unit is made so that its axis of rotation coincides with the optical axis of one of the channels.

4. The device according to claim 1, characterized in that the scanner unit is made in the form connected with a coordinate table via the node rotation of the plug that is installed with the possibility of setting controlled inner and outer surfaces of the product, the teeth of which are made open to the Nala ensuring the passage of the light flux from conoscope to the outer and inner surfaces of the product, a system of mirrors placed in these channels with the possibility of overlapping channels.

5. The device according to claim 4, characterized in that the fork channels optically connected with conoscope so that the axis of the channel of one of its teeth coincides with the optical axis of conoscope.

6. The device according to claim 4 or 5, characterized in that the axis of rotation of the plug coincides with the optical axis of conoscope.

7. The device according to claim 1, wherein the mirror is arranged to change its position.

8. The device according to claim 1, characterized in that it is provided with blocks alignment and calibration.

9. The device according to claim 1, characterized in that the coordinate table is equipped with a control system that includes modules for linear and circular motion, to provide reciprocating and circular motion of the scanner unit.



 

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