CN101685064B - Pipeline reducing diameter detecting device - Google Patents

Abstract

A pipeline reducing diameter detecting device comprises a cavity (1), a data processing device (3), a plurality of reducing diameter detectors (4) electrically connected with the data processing device (3) and a plurality of cups (5) fixed on the outer circumference of the cavity (1) along the axial direction of the cavity (1). The data processing device is used for storing the information detected by the reducing diameter detectors (4). The reducing diameter detectors (4) are arranged on the outer circumference of the cavity (1) and positioned between any two cups (5). The reducing diameter detectors (4) are positioned between any two cups (5), namely between two axial ends of the cavity (1); therefore, the reducing diameter detectors (4) only bear less pressure even though the bend part of the pipeline is detected, as a result, the detection result is more accurate.

Description

Pipeline reducing diameter detecting device

Technical field

The present invention relates to a kind of pipeline reducing diameter detecting device, more particularly, the long distance pipeline that relates to a kind of convection cell carries out the device that reducing detects.

Background technology

Fluids such as oil, rock gas are carried the main mode that becomes domestic and international energy conveying by pipeline.In a single day pipeline has an accident, and not only can cause enormous economic loss, also can produce serious consequence to surrounding enviroment etc.Therefore, accurate and effective pipe detection device has vital role to the normal operation of guaranteeing pipeline.Pick-up unit in the pipeline comprises magnetic leakage pick-up unit and reducing diameter detecting device etc.The magnetic leakage pick-up unit is mainly used in the defective that produces because of corrosion etc. on the detection inner-walls of duct, and reducing diameter detecting device then is mainly used in and detects because radially variations such as duct wall is concavo-convex because of fatigue, collision etc. produce, mechanically deforms.Pipeline reducing diameter detecting device generally includes cavity, data processing equipment, be electrically connected and be arranged on usually a plurality of reducing detecting devices of rear end of described cavity and a plurality of leather cups on the excircle that is axially fixed in this cavity of this cavity with this data processing equipment.Described leather cup is used for pipeline reducing diameter detecting device is supported in the pipeline, and makes under the promotion of the fluid that flows in pipeline that pipeline reducing diameter detecting device flows in pipeline.In this flow process, a plurality of reducing detecting devices are measured the diameter of inner-walls of duct each point, and this measurement result is stored in the data processing equipment.Each this reducing detecting device generally includes the test arm that radially extends along cavity, and this test arm one end pivoting is connected on this cavity, and the other end contacts with inner-walls of duct, thereby when the diameter of pipeline a part changes, pivoted with the test arm that this position contacts.Just the corresponding pipe diameter in each position can be obtained by detecting test arm in the angle of the pivot at each position, thereby the reducing defective of pipeline can be detected.The present inventor finds that in practice the testing result of existing this pipeline reducing diameter detecting device is not accurate enough, and especially the bend measurement result partly to pipeline is inaccurate.When pipeline reducing diameter detecting device passes through the bend part, the two ends of the described cavity of pipeline reducing diameter detecting device can be subjected to bigger pressure, thereby the reducing detecting device of rear end that is arranged on this cavity usually can produce bigger distortion under the influence of this pressure, makes the pivot situation of test arm of reducing detecting device can't correctly reflect the reducing defective of pipeline.For example, even do not exist at pipeline under the situation of reducing defective, the test arm of reducing detecting device also might be pivoted, thereby report the reducing defective mistakenly, and vice versa.

Summary of the invention

The present invention is directed to pipeline reducing diameter detecting device of the prior art in the inaccurate shortcoming of measurement result, a kind of pipeline reducing diameter detecting device that can be more exactly the reducing defective of the bend part of pipeline be detected is provided the bend of pipeline part.

Pipeline reducing diameter detecting device provided by the invention comprises cavity, data processing equipment, a plurality of reducing detecting devices that are electrically connected with this data processing equipment and a plurality of leather cups on the excircle that is axially fixed in this cavity of this cavity, described data processing equipment is used to store the information that described reducing detecting device is detected, wherein, described a plurality of reducing detecting device is arranged on the described cavity excircle and between any two leather cups.

According to pipeline reducing diameter detecting device provided by the invention, because the reducing detecting device is between any two leather cups, i.e. position between the axial two ends of this cavity, even therefore when detecting the bend part of pipeline, this reducing detecting device also only is subjected to less pressure, thereby testing result is more accurate.

Description of drawings

Fig. 1 is the structural representation according to pipeline reducing diameter detecting device of the present invention;

Fig. 2 is the perspective view of the reducing detecting device of pipeline reducing diameter detecting device shown in Figure 1;

Fig. 3 is the front elevation of reducing detecting device shown in Figure 2;

Fig. 4 is the left side view of reducing detecting device shown in Figure 3;

Fig. 5 is the partial sectional view of the part of reducing detecting device shown in Figure 3.

Embodiment

Describe the specific embodiment of the present invention below with reference to the accompanying drawings in detail.

As shown in Figure 1, pipeline reducing diameter detecting device provided by the invention comprises cavity 1, data processing equipment 3, a plurality of reducing detectingdevices 4 that are electrically connected with this data processing equipment 3 and a plurality ofleather cups 5 on the excircle that is axially fixed in this cavity 1 of this cavity 1, described data processing equipment 3 is used to store the information that described reducing detectingdevice 4 is detected, wherein, described a plurality of reducing detectingdevice 4 is arranged on described cavity 1 excircle and between any twoleather cups 5.

Describedleather cup 5 is used for pipeline reducing diameter detecting device is supported in the pipeline, and makes under the promotion of the fluid that flows in pipeline that pipeline reducing diameter detecting device flows in pipeline.In this flow process, the diameter of 4 pairs of inner-walls of duct each points of a plurality of reducing detecting devices is measured, and this measurement result is stored in the data processing equipment 3.Because described reducing detectingdevice 4 is between any twoleather cups 5, so position between the axial two ends of described cavity 1, even therefore when detecting the bend part of pipeline, this reducing detectingdevice 4 also only is subjected to less pressure, thereby testing result is more accurate.

Position between the axial two ends of described cavity 1 includes but not limited to the axial middle of described cavity 1 and near position thereof.

The number and the position of describedleather cup 5 can be set as required.For example, describedleather cup 5 is 2-4, and wherein two describedleather cups 5 are separately positioned on the axial two ends of described cavity 1, and described reducing detectingdevice 4 is arranged between these two leather cups 5.As shown in Figure 1, describedleather cup 5 is 4, and the both sides of reducing detectingdevice 4 are provided with twoleather cups 5 respectively.

Preferably, described reducing detectingdevice 4 and the ratio that is arranged on the distance between twoleather cups 5 at the axial two ends of described cavity 1 are 0.8-1.2.That is, described reducing detectingdevice 4 is positioned near the position, middle of twoleather cups 5 at these two ends.For example, when this described reducing detectingdevice 4 and the ratio that is arranged on the distance between twoleather cups 5 at the axial two ends of described cavity 1 were 1, described reducing detectingdevice 4 was positioned at the middle of twoleather cups 5 at these two ends.

Described reducing detectingdevice 4 can be various reducing detecting devices well known in the art.For example parallelogram reducing detecting device, umbrella support reducing detecting device etc.Preferably, extremely shown in Figure 5 as Fig. 2, described reducing detectingdevice 4 comprises:base 41,test arm 42 andangular transducer 43, describedtest arm 42 comprisesarm 421, fixedpart 422 and installation portion (not shown), described installation position is between describedarm 421 and describedfixed part 422, described installation portion and describedbase 41 are pivotally connected, and describedangular transducer 43 is used to detect describedarm 421 with respect to describedbase 41 pivotally supported angles.

During use, owing to thefixed part 422 of describedtest arm 42 is fixedlyed connected with described cavity 1, so the end ofarm 421 contacts with inner-walls of duct all the time.When pipe diameter changed, thistest arm 42 just rotated with respect to describedbase 41 pivots, and describedangular transducer 43 detects this pivotally supported angle, thereby can calculate the variation of this position pipe diameter by this angle gauge.This reducing detectingdevice 4 is directly measuredtest arm 42 with respect tobase 41 pivotally supported angles byangular transducer 43, so its testing result is more accurate.And this reducing detectingdevice 4 need not structures such as integrating dish, and is therefore relatively simple for structure.In addition, a plurality of reducing detectingdevices 4 are along circumferentially being arranged on the excircle of described cavity 1, and need not to take the centre position at cavity 1 place, thus be specially adapted to above-mentioned pipeline reducing diameter detecting device, promptly this reducing detectingdevice 4 is specially adapted to be arranged on the centre position at the axial two ends of cavity 1.

Describedangular transducer 43 can adopt the various sensor that takes measurement of an angle and change well known in the art.And can select its installation site according to the type of described angular transducer, for example, described angular transducer can be installed on describedbase 41, installation portion,arm 421 or the fixed part 422.Under the preferable case, describedangular transducer 43 is the rotation differential transformer, and the measuring accuracy of such angular transducer is than higher.At this moment, theangular transducer 43 of this rotation differential transformer type is fixedlyed connected with describedtest arm 42, for example, can fixedly connected with described installation portion,arm 421 orfixed part 422 by described angular transducer 43.Thereby describedangular transducer 43 is along with describedtest arm 42 rotates with respect to describedbase 41, and the angle of this rotation is thattest arm 42 is with respect tobase 41 pivotally supported angles.

Can adopt various pivotally connected mode well known in the art to maketest arm 42 andbase 41 pivotally connected, for example adopt bearing, axle sleeve etc.As a kind of concrete embodiment, this reducing detectingdevice 4 also comprisesaxle 45 andaxle sleeve 46, in wherein saidaxle 45 and described installation portion and thebase 41 one fixedlyed connected, in describedaxle sleeve 46 and installation portion and thebase 41 other one fixedlyed connected, and described installation portion is pivotally connected with describedbase 41 by describedaxle 45 and axle sleeve 46.At this moment, describedangular transducer 43 can be fixed on described installation portion, theaxle 45 of fixedlying connected with installation portion or theaxle sleeve 46 of fixedlying connected with installation portion.For example as shown in Figure 5, describedaxle 45 is fixed on the describedtest arm 42, and describedaxle sleeve 46 is fixed on the describedbase 41, and is arranged between describedaxle 45 and the described base 41.At this moment, as shown in Figure 5, describedangular transducer 43 can be fixed on the described axle 45.For example as shown in Figure 5, describedangular transducer 43 is plugged in the describedaxle 45, and is undertaken fastening by screw.As Fig. 2, Fig. 3 and shown in Figure 5, described reducing detectingdevice 4 can also comprisefixed cover 44, and this fixedcover 44 is enclosed within the periphery of describedangular transducer 43 andaxle 45 coupling parts roughly in the form of a ring, and an end is formed with flange, and this flange is fixed on the described base 41.That thereby thisfixed cover 44 can play is fixing, the effect of protection.

Thearm 421 and thefixed part 422 of describedtest arm 42 can be in alignment, as shown in Figure 4, angulation a between describedarm 421 and the describedfixed part 422, thus can make the structure of this reducing detectingdevice 4 compact more.Be understandable that, for example, when describedarm 421 and fixedpart 422 when being shaft-like, described angle a is the formed angle of axis of describedarm 421 axis and fixedpart 422, when describedarm 421 and fixedpart 422 when being tabular, described angle a is the formed angle in plane at the plane and fixedpart 422 places at describedarm 421 places.This angle a can be provided with according to actual conditions, and for example, this angle a can be 20 °-150 °, for example 120 °.

Describedarm 421 can be provided with as the case may be with the length of describedfixed part 422, and common describedarm 421 for example can be 2-20:1 with the length ratio of describedfixed part 422.

Described a plurality of reducing detectingdevices 4 can be arranged on the excircle of described cavity 1 in any form, if with described a plurality of reducing detectingdevices 4 be distributed in appropriate density cavity 1 excircle radially.Under the preferable case, as shown in Figure 1, described a plurality of reducing detectingdevices 4 are identical with respect to the axial location of described cavity 1, promptly described a plurality of reducing detectingdevices 4 on the excircle of described cavity 1 around forming a week.

The number of described reducingdetecting device 4 can be set as required, and for example described reducingdetecting device 4 is 2-100, is preferably 10-50, more preferably 15-30.

Can adopt mode well known in the art that describedfixed part 422 is connected with described cavity 1 elasticity, as a kind of concrete embodiment, describedfixed part 422 is connected with described cavity 1 by the spring (not shown).

Described data processing equipment 3 is used to store the information that described reducing detectingdevice 4 is detected, described information can comprise describedangular transducer 43 records angular dimension, measure the information such as the moment of this angle.Described data processing equipment 3 can also be used for the information that described reducing detectingdevice 4 is detected is compressed processing, thereby reduces the capacity requirement of this data processing equipment 3.Described data processing equipment 3 can also be used to write down the speed of pipeline reducing diameter detecting device walking, thereby can draw the particular location that reducing takes place.Described data processing equipment 3 can be well known in the artly variously can store data and have the device that data is compressed and/or analyzed according to user's needs, for example computer unit, single-chip microcomputer etc.

Described data processing equipment 3 can be contained in the described cavity 1.Described pipeline reducing diameter detecting device can also comprise power supply, and this power supply also can be contained in the described cavity 1.

Described pipeline reducing diameter detecting device can also comprise the transmitter 6 that is connected on the described cavity 1, and as shown in Figure 1, this transmitter can be connected the front end of cavity 1.This transmitter 6 is used to launch low frequency signal, and this low frequency signal is received by ground receiving trap, thereby this pipeline reducing diameter detecting device is positioned.

Described pipeline reducing diameter detecting device can also comprise the mileage wheel 7 that is connected on the described cavity 1, and as shown in Figure 1, described mileage wheel 7 is connected the rear end of cavity 1.The mileage of the described pipeline reducing diameter detecting device walking of this mileage wheel 7 records, and this mileage information is stored in this data processing equipment 3 is so that more accurately occur the particular location of reducing defective on the targeted duct.The concrete structure of described transmitter 6 and mileage wheel 7 is a technology well known in the art, does not repeat them here.

Claims (16)

1. pipeline reducing diameter detecting device, this device comprises cavity (1), data processing equipment (3), a plurality of reducing detecting devices (4) that are electrically connected with this data processing equipment (3) and a plurality of leather cups (5) on the excircle that is axially fixed in this cavity (1) of this cavity (1), described data processing equipment (3) is used to store the information that described reducing detecting device (4) is detected, it is characterized in that, described a plurality of reducing detecting devices (4) are arranged on the excircle of described cavity (1) and are positioned between any two leather cups (5), described reducing detecting device (4) comprising: base (41), test arm (42) and angular transducer (43), described test arm (42) comprises arm (421), fixed part (422) and installation portion, described installation position is between described arm (421) and described fixed part (422), described installation portion and described base (41) are pivotally connected, described angular transducer (43) is used to detect described test arm (42) with respect to the pivotally supported angle of described base (41), wherein said base (41) is fixed on the described cavity (1), and described fixed part (422) is connected with described cavity (1) elasticity.

2. pipeline reducing diameter detecting device according to claim 1, it is characterized in that, described leather cup (5) is 2-4, and two leather cups (5) wherein are separately positioned on the axial two ends of described cavity (1), and described reducing detecting device (4) is arranged between these two leather cups (5).

3. pipeline reducing diameter detecting device according to claim 2 is characterized in that, described reducing detecting device (4) is 0.8-1.2 with the ratio of the distance of two leather cups (5) that are arranged on the axial two ends of described cavity (1).

4. reducing detecting device according to claim 1 is characterized in that, described angular transducer is installed on described base (41), installation portion, arm (421) or the fixed part (422).

5. pipeline reducing diameter detecting device according to claim 1 is characterized in that, described angular transducer (43) is the rotation differential transformer.

6. reducing detecting device according to claim 1 is characterized in that, described angular transducer (43) is fixedlyed connected with described installation portion, arm (421) or fixed part (422).

7. according to claim 1 or 6 described reducing detecting devices, it is characterized in that, this reducing detecting device (4) also comprises axle (45) and axle sleeve (46), in wherein said axle (45) and described installation portion and the base (41) one fixedlyed connected, in described axle sleeve (46) and installation portion and the base (41) other one fixedlyed connected, and described installation portion is pivotally connected by described axle (45) and axle sleeve (46) and described base (41).

8. reducing detecting device according to claim 7 is characterized in that, described angular transducer (43) is fixed on described installation portion, the axle (45) of fixedlying connected with installation portion or the axle sleeve (46) of fixedlying connected with installation portion.

9. pipeline reducing diameter detecting device according to claim 1 is characterized in that, angulation (a) between described arm (421) and the described fixed part (422).

10. pipeline reducing diameter detecting device according to claim 9 is characterized in that, the angle (a) that forms between described arm (421) and the described fixed part (422) is 20 °-150 °.

11. pipeline reducing diameter detecting device according to claim 1 is characterized in that, described a plurality of reducing detecting devices (4) are identical with respect to the axial location of described cavity (1).

12., it is characterized in that described reducing detecting device (4) is 2-100 according to claim 1 or 11 described pipeline reducing diameter detecting devices.

13. pipeline reducing diameter detecting device according to claim 1 is characterized in that, described fixed part (422) is connected with described cavity (1) by spring.

14. pipeline reducing diameter detecting device according to claim 1 is characterized in that, described data processing equipment (3) also is used for the information that described reducing detecting device (4) is detected is compressed processing.

15. pipeline reducing diameter detecting device according to claim 1 is characterized in that, described pipeline reducing diameter detecting device also comprises the transmitter (6) that is connected on the described cavity (1).

16. pipeline reducing diameter detecting device according to claim 1 is characterized in that, described pipeline reducing diameter detecting device also comprises the mileage wheel (7) that is connected on the described cavity (1).

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