SU1438863A1 - Method of sorting pipes by deviations from alignment of connections - Google Patents

Description

 CCS f, (of-fi) + nj

about

one

(,

where j, tT,: ff are the beating halves, respectively, of the pipe and the joint at the connecting end and at the free end; distances of planes in which IZ G.

measure the beating of the pipe and the connected and free ends from the support

. , is the distance of the joint end from the support

.e (ej

A 1 1 -

where d is u ma bi nor bo

/ i - ubi bi plo to

.e (ej)

A 1 1 - IW

1 g li

where d - the angle of rotation of the pipe between. maximum values of welded joint beats, neither at the connecting and free ends J

(i) is the angle of tube rotation with the maximum values of pipe beats in the plane, at a distance from the support, and in the plane of the connecting end.

The invention relates to the field of production of exploration pipes with welded joints, mainly drilling, namely, to the control and sorting of pipes by the quality of welding of connecting elements in terms of coaxiality of connections.

The purpose of the invention is improving the accuracy of sorting pipes.

Fig. 1 shows an installation diagram for the implementation of the proposed method, the sorting of pipes according to the misalignment of gfiwarsh. threaded connections with a measurement operation to computed 51 pairs of 1-hand misalignment metrosis; FIG 2 is a design diagram for determining the bone misalignment parameters of the proposed method, 3 view A in FIG 2 on the automatic pipe sorting device according to the parameters of misalignment in FIG. 5, the calculation diagram of the curvilinear groove profile of the drive mechanism properties of the flow control pipe in the zone of action of the misalignment sensors.

The method of sorting pipes by OPEN

from the alignment of the joints ™, it is desirable that the pipe with welded joints is installed on two hinged supports (or parallel ones) of the clamp, so that the distance from the supports (guides) to the welds is g- 1i: W1th possible (usually not more than mm) - and welded joints cantilever

ten

"

0

five

0

five

blunt from the outside of the supports (gazih direction).

Next, on a rigid base, transducers, indicators, or sensors are installed, which, when the pipe rotates on the supports or is rolled along the yuchl-gm directions, are measured in planes perpendicular to the axis connecting the supports, the beating of the tube f in the plane removed to a distance of 1 150 -250 mm from the support, the beating f of the weld joint at the weld. In a plane removed at a distance of 1–10-15 mm from the support, and the beating f of the connector at the free end in the plane remote from the support of I j, commensurate with a length of connection. At the same time, with the help of indicators, the angle c / rotation of the pipe between the maximum i indications of indicators measuring the weld beats of the weld joint f and the free end f, as well as the angle of rotation of the pipe between the maximum indications of the indicators of measurement beats f pipe mf welded joint at the weld. Then, linear linear angle angular b deviations from the coaxiality of the joint welding to the pipe body are calculated using the formulas, the calculated values of the parameters L and 9 are compared with the allowable ones and, based on this comparison, the pipes are sorted according to the welding accuracy for suitable and defective. The linear deviation from alignment D is defined as the value of the segment (Fig. 2) by the formula

 -

(, -) (at

 A (cos c /. -) cosfi + (Ac / l sinc / - cf sinfi) „Angular deviation from coaxiality for cos Q by two lines, field

determined by the known formula 45, the distance to stori given in space;

,, o- Moi

Cos b

, - / VV / Hv4 o-h o

) - (2 -2 1

   Omo

(cose /) with / cosfi J Sino (- c / sinfi 4ge

,, c /, ccs..e i

Using the relation sin-b-f- smallness of the angle 9, finally half- + c. 1 and taking into account 55 teas

sin b - 0 - V 1 ft - / ocP cosCo - fi) + llo j

-one

(cf, - ci + r) (J o + 1 o)

/ w

w

P1

J

) - (2 -2 1

   Omo

 j

-one

The method is automatically performed as follows.

The device for automatic pipe sorting by coaxiality of welding of threaded connections (Fig. 4) contains two prismatic oblique guides 1 (second guide not shown), mounted on base 2, coaxiality sensors (three sensors on each other end of the pipe), made in the form spring-loaded f rods 3, at one end of which the strips 4 are located parallel to

guide 1 for contact with the tube, 15 this block 13 comparators developed on the other is a sensitive element made in the form of a core 5, which has the ability to move inside the coil b with the winding 7. The analyzer 8 coaxiality consists of an analog-digital converter 9, the output of which is connected to the register block 10, the microprocessor block 11 11 having connections with the register blocks 10, the counters 12: and the comparators 13. One of the outputs of the comparators 13 block 13 goes to the input of the counter block 12, one of the outputs of the comparators block 13 analysis 8 alignment torus connected to the input control unit 14. The output of the control unit 14 is connected to a sorting mechanism, implemented in the form of a rotary table 15, kinematically connected with a drive of an electric motor 16 of a mechanism for ensuring the constant speed of pipe rolling along guide rails and strips 4 consisting of a disk 17 with a curved groove 18 and an actuator 19, position 20 denotes rods, position 21 denotes guides for rods. The curvilinear profile of the groove 18 of the disk 17, ensuring the constant rolling speed of the pipe, is determined by the design scheme shown in FIG. 5, where the position 22 denotes a section of the alignment sensors 4 in the area of action of the strip of coaxiality sensors, and the position 23 denotes a pipe with a radius of r.

The device works as follows.

The inspected pipe 23 with the help of discs 17 gets from the receiving bungker (not shown) to the inclined guides and rolls along them at a constant speed in the zone of action of the slats 4. When rolling on the slats

4, the tube 23 presses them down, while the strips 4 compress the springs 20, shortening their length depending on the magnitude of the pipe curvature and misalignment of the welded joints, the rods 3 also lower and move the cores 5 in the coils 6. When the cores move in the windings 7, sinusoidal electrical signals that are simultaneously supplied to the analog-to-digital converter 9 and the comparator block 13 of the misalignment analyzer 8. With

The pulse arrives at analog-to-digital converter 9 when the analog signals at the output of the sensors reach their maximum value of 0. Analog-to-digital Converter 9 on these pulses transmits information about the magnitude of the beats in the block 10 registers, where it goes to the block 11 of the microprocessor. Simultaneously, signals from block 13 of comparators go to block 12 of counters, which determines time intervals proportional to the values of the angles. Information about the magnitudes of the angles ai 0 and ft comes from the block 12 of the counters to the microprocessor block 11. Thus, the block 11 of the microprocessor has sufficient information to determine the angles o and / 3. From the measured beats m-fp, f, and, as well as the angles "and / i, microprocessor unit 11 calculates linear and angular misalignment. Moreover, since the number of sensors is six (three at each end of the pipe), the analog-digital converter 9 has six channels and a block of 12 meters, respectively, six meters, respectively, and the information in the microprocessor block 11 is processed sequentially. First, the linear and angular misalignments dL of one end of the pipe are calculated, then for the other. The results of the calculations are compared with the allowable ones, and when they do not exceed the allowable ones, the comparators block 13, to which the signal comes from the microprocessor block 11, does not generate a signal to the control block 14. Otherwise, the control unit 14 commands the drive of the electric motor 16, as a result of which the table 15 rotates and the pipe 23 rolls into the bunker to non-standard products m.

0

five

0

five

Phie. one

M

FIG. 3

- 23

 disco

IS

Claims (1)

* METHOD FOR SORTING PIPES BY DEVIATIONS FROM THE CONJUNCTION OF CONNECTIONS, including measuring the beats of the joint at the connected and free ends of the joint and the angle of rotation of the pipe between the maximum values of the beats during rotation or rolling of the pipe on two supports, calculating linear and angular deviations from the alignment and determining the suitability of the joints for subsequent sorting by comparing the measured calculated values of linear and angular deviations from alignment with acceptable values, characterized in that, in order to increase t accuracy of sorting, additionally measure the runout of the pipe relative to the line of supports at the base distance from the support and the angle of rotation of the pipe between the maximum values of runout of the pipe and soy. end, and the misalignment parameters are calculated by the formulas Δ = 1 -A (<^ cosef) ⁺ сР _ш sin β) ² , to (Л l-ο »1 · -f, 1 2 | COS О ' ₊ (Г * half beats, respectively, of the pipe and connection at the connected end and at the free end *, the distances of the planes in which the runout of the pipe and the connected and free ends are measured from the support ^ the distance of the connected end from the support * 4 - the angle of rotation of the pipe between · the maximum values of the runout of the welded joint. junction at the connected and free ends j - the angle of rotation of the pipe between the maximum values of the runout of the pipe in the plane, at a distance from the support and in the plane of the connected end.