KR20170000972A - Hollow type centering apparatus - Google Patents

Hollow type centering apparatus Download PDF

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Publication number
KR20170000972A
KR20170000972A KR1020150090252A KR20150090252A KR20170000972A KR 20170000972 A KR20170000972 A KR 20170000972A KR 1020150090252 A KR1020150090252 A KR 1020150090252A KR 20150090252 A KR20150090252 A KR 20150090252A KR 20170000972 A KR20170000972 A KR 20170000972A
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KR
South Korea
Prior art keywords
center
tube
support shaft
central
support
Prior art date
Application number
KR1020150090252A
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Korean (ko)
Inventor
김기성
Original Assignee
전남대학교산학협력단
주식회사 큐피드
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Application filed by 전남대학교산학협력단, 주식회사 큐피드 filed Critical 전남대학교산학협력단
Priority to KR1020150090252A priority Critical patent/KR20170000972A/en
Publication of KR20170000972A publication Critical patent/KR20170000972A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
    • F16L55/28—Constructional aspects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/04—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring the deformation in a solid, e.g. by vibrating string
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2101/00—Uses or applications of pigs or moles
    • F16L2101/30—Inspecting, measuring or testing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The present invention relates to a centering apparatus, and more specifically, to a hollow centering apparatus which enables to position a tube diagnostic device diagnosing a defect in a tube at the inner center of the tube always, is small in size to facilitate movement in a bent portion of a tube, enables to deliver external driving force to the tube diagnostic device through the center of the apparatus, and has a hollow formed therein.

Description

[0001] Hollow type centering apparatus [0002]

More particularly, the present invention relates to a centering device, and more particularly, to a tube diagnostic device for diagnosing a defect in a tube, which can always be positioned in the center of the tube, is small in size and easy to move the bending part, To a hollow centering device having a hollow capable of transmitting an external driving force to the device.

In the case of pipes (pipes) that transport oil and gas in chemical plants and steelworks, various non-destructive testing devices are used to detect defects.

These non-destructive testing devices are IRIS (Internal Rotary Inspection System) devices and intelligent pigs, and these devices are generally called tube diagnosis devices.

1 is a view showing a conventional tube diagnostic apparatus.

Referring to FIG. 1, a conventional tube diagnostic apparatus (Korean Patent Registration No. 1424070) includes a head 11 for ultrasonic inspection and an elastic disk 12 for positioning the head 11 at the center of the tube P .

That is, in the conventional tube diagnosis apparatus, the elastic disk 12 is designed in such a manner that the outer diameter of the elastic disk 12 is designed to be larger than the outer diameter of the tube P, To place the head 11 in the longitudinal center P 'of the tube P. [0060]

However, the centering method using the elastic disk 12 has a problem that the resistance increases when the device moves in the tube P. When the tube P is bent, There is a problem such that the antenna 11 is located in an unintended direction.

In order to solve such a problem, a centering device has been developed which can reduce the resistance in the course of positioning the tube diagnosing device at the center of the tube (P).

Fig. 2 shows a conventional centering device, which is an Olympus IRIS Probe centering unit.

2, the conventional centering device 20 requires a fixing shaft 22 for fixing the centering unit 21 at the center, and is provided with elasticity by a supporting portion 21a which rubs against the inner surface of the tube. The elastic body 23 exists in the axial direction.

Therefore, there is a problem in that the length of the tube is long in the traveling direction, and it is difficult to pass through the curved tube portion, and the plurality of support portions 21a rotate.

Further, since the fixed shaft 22 exists at the center of the shaft, there is a problem that power can not be transmitted to the tube diagnostic device through the shaft center.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a centering device having a short axial length,

It is also an object of the present invention to provide a centering device capable of always positioning the connected tube diagnostic device at the center of the tube.

It is also an object of the present invention to provide a centering device that enables power transmission to a tube diagnostic device through an axial center.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a centering device for positioning a tube diagnosing device for detecting defects in a tube in the longitudinal center of the tube, comprising: a center support shaft; And a plurality of supports rotatably connected to the outside of the central support shaft and radially connected to the center of the central support shaft, wherein the support supports have one end facing the inside of the tube when inserted into the tube And the center of the central support shaft is located at the center of the tube in the longitudinal direction by being pivotally connected to the central support shaft with the same angle with respect to the center of the central support shaft. A centering device is provided.

In a preferred embodiment, the center support shaft is formed with a hollow through the center thereof, and the tube diagnostic apparatus can receive power from the outside through the hollow.

In a preferred embodiment of the present invention, a plurality of pivot shafts are provided on the outer side of the central support shaft so as to be rotatable with respect to the support shafts so as to be pivotable about the central support shaft, As shown in Fig.

In a preferred embodiment, bevel gears are provided at both ends of each of the pivot shafts, and when the bevel gears are gear-engaged with the bevel gears of the adjacent pivot shafts to generate a rotational force in one of the bevel gears, Thereby causing the supports to rotate at the same angle with respect to the center of the central support shaft.

According to a preferred embodiment of the present invention, the center support shaft is provided with a plurality of elastic bodies for coupling the center support shaft and the support rods in correspondence with the support rods, and one end of the support rods to which the elastic bodies are connected is connected to the center So as to have elasticity in the outer circumferential direction.

In a preferred embodiment, the other ends of the support rods are bent in the outward direction of the central support shaft about the pivotally connected rods, the elastic bodies connect the other end of the support rods and the central support shaft, By having elasticity in the direction of the center of the central support shaft, one end of the support member is made elastic in the outer peripheral direction from the center of the central support shaft.

In a preferred embodiment, one end of each of the support rods is provided with a rotating member that rotates while rubbing against the inner surface of the tube when the tube is inserted into the tube.

The present invention has the following excellent effects.

First, the centering device of the present invention does not require a separate fixing shaft at the center, and since the elastic body is provided toward the outer circumferential direction of the device, the centering device of the present invention is advantageous in moving the bending portion of the tube.

Further, according to the centering device of the present invention, since the hollow is formed at the center of the device, the external driving force can be transmitted to the tube diagnostic device through the center.

In addition, according to the centering device of the present invention, since the radial supports are synchronized with each other at the same rotation angle, the tube diagnostic device can always be positioned at the center of the tube.

1 shows a conventional tube diagnostic device,
2 is a view showing a conventional centering device,
3 is a view showing a centering device according to an embodiment of the present invention,
FIG. 4 is a front view of a centering device according to an embodiment of the present invention, FIG.
5 is a side view of a centering device according to an embodiment of the present invention.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

3 to 5, a centering device 100 according to an embodiment of the present invention includes a center support shaft 110 and a plurality of supports 120, And an elastic body 150 for providing an elastic force.

The central support shaft 110 is located in the longitudinal center of the tube p when it is inserted into the tube (p) by an axis for supporting other components.

In addition, the center support shaft 110 is preferably cylindrical in shape corresponding to the shape of the tube p, but there is no particular limitation on the shape.

In addition, the central support shaft 110 may be formed with a fastener 112 for coupling the tube diagnostic device with the tube diagnostic device for inspecting the tube.

In addition, a hollow 111 passing through the center support shaft 110 is formed at the axial center c of the center support shaft 110.

In general, the tube diagnostic device should be provided with an external driving force to the tube diagnostic device, since the head part of the ultrasonic sensor is rotated and the tube (p) is inspected.

That is, the hollow 111 is a passage through which the drive shaft for passing the external driving force to the tube diagnostic device passes when the tube diagnostic device is coupled.

Therefore, as compared with the conventional centering device 20 shown in FIG. 2, since the hollow shaft 111 is formed without the fixing shaft 22 at the center, the external driving force can be easily transmitted to the tube diagnostic device through the hollow There are advantages to be able to.

The support rods 120 are rotatably connected to the outside of the central support shaft 110, respectively.

In addition, the support rods 120 are radially connected to the center support shaft 110.

One end 121 of the support 120 facing the inner surface of the tube p is in contact with the inner surface of the tube p and the center support shaft 110 is positioned in the longitudinal center of the tube p do.

The support rods 120 are respectively connected to the central support shaft 110 so as to be resilient toward the outer circumferential direction (r, radial direction) from the center c of the center support shaft 110.

In other words, the supports 120 have a force that flares from the center of the tube p toward the inner surface of the tube p.

The support rods 120 are rotated with the same angle with respect to the center c of the center support shaft 110 so that the center support shaft 110 is always positioned in the longitudinal center of the tube p do.

In other words, the supports 120 are simultaneously rotated at the same angle toward the center c of the center support shaft 110 or toward the outer periphery of the center support shaft 110.

Compared with the conventional centering unit 20, the support rods 120 are not pivoted, but are rotated at the same angle, so that the connected tube diagnostic apparatus can always be positioned in the longitudinal center of the tube p .

The center support shaft 110 is provided with a plurality of pivot shafts 130, 130a, and 130b that pivotally support the support rods 120 in a number corresponding to the support rods 120, .

In addition, the pivot shafts 130, 130a, and 130b are coupled to the corresponding support rods and rotate together with the rotation of the support rods.

In addition, the pivot shafts 130, 130a, and 130b are provided in a direction orthogonal to the center c of the center support shaft 110, and their axial directions are different from each other.

In other words, the pivot shafts 130, 130a, and 130b are oriented in different directions on a plane orthogonal to the center c of the center support shaft 110, respectively.

The pivot shafts 130, 130a, and 130b have bevel gears 140 and 141 at both ends, respectively. However, the bevel gears 140 and 141 may be replaced by other types of gears, or may be replaced with a plurality of gears.

Further, the bevel gears 140 and 141 are gear-engaged with bevel gears of the adjacent pivot shafts.

3, one bevel gear 140 of the first pivot shaft 130 among the pivot shafts 130, 130a and 130b is connected to one bevel gear 140a of the second pivot shaft 130a, And the other bevel gear 141 is gear-engaged with one bevel gear 141a of the second rotating shaft 130b.

In this type of coupling, all of the pivot shafts are gear-engaged with each other, and only one pivot shaft can not rotate independently, and all the pivot shafts are rotated synchronously together.

That is, the support rods 120 coupled to the respective pivot shafts simultaneously rotate at the same angle.

Therefore, the center c of the center support shaft 110 is always located at the center of the tube p in the longitudinal direction, even though the size (diameter) of the tube p varies or is bent.

One end 121 of each support base 120 is supported on the center support shaft 110 in a direction corresponding to the support base 120 in the circumferential direction of the center support shaft 110 r to provide elasticity.

Also, the elastic members 150 are disposed radially with respect to the center support shaft 110 in correspondence with the arrangement of the supports 120.

That is, since the direction in which the elastic members 150 are provided is not in the axial direction but in the outer peripheral direction (r) as compared with the conventional centering device 20, the width in the moving direction can be reduced, .

Also, although the elastic members 150 are shown as being formed of springs in the drawings, various elastic supporting means such as an elastic belt and an actuator may be used.

The support rods 120 are formed such that one end 121 and the other end 122 of the support rods 120 are bent in the inner surface direction of the tube p, that is, in the outward direction of the central support shaft 110, As shown in FIG.

The elastic member 150 is configured to support the other end 122 of the support base 120 at a center c of the center support shaft 110 So that one end 121 of the supporter 120 is resilient in the inner surface direction of the tube p, that is, in the outer peripheral direction r from the center c of the central supporter shaft 110 do.

In other words, the other end 122 of the supporter 120 becomes a force point, the one end 121 becomes a point of action, and the center c1 of the pivot 130 becomes a fulcrum.

Therefore, there is an advantage that large elasticity can be generated even with a small force.

In addition, a rotary member 160 may be provided at one end 121 of each support base 120 so as to reduce friction with the inner surface of the tube p.

Although the rotary member 160 is shown as a roller in the drawings, the rotary member 160 can be replaced with a rotary member having various shapes that can rotate as a ball.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the present invention. Various changes and modifications will be possible.

100: centering device 110: center support shaft
111: hollow 120: support
130, 130a, 130b: Pivot shaft 140, 140a, 141, 141a:
150: elastomer

Claims (7)

A centering device for positioning a tube diagnostic device in the longitudinal center of the tube for detecting defects in the tube,
A central support shaft; And
And a plurality of supports rotatably connected to the outside of the center support shaft and radially connected to the center of the center support shaft,
One end of the supporter facing the inner side of the tube is connected to the tube so as to be resilient from the center of the central supporter toward the outer periphery when the supporter is inserted into the tube,
So that the center of the center support shaft is positioned at the center of the tube in the longitudinal direction by rotating the center support shaft with the same angle with respect to the center of the center support shaft.
The method according to claim 1,
Wherein the center support shaft is formed with a hollow through the center thereof, and the tube diagnostic device is capable of receiving power from the outside through the hollow.
3. The method according to claim 1 or 2,
And a plurality of pivot shafts provided on the outer side of the central support shaft so as to be rotatable about the central support shaft in correspondence with the support rods,
Wherein the pivot shafts are provided in a direction in which the pivot shafts are orthogonal to the center of the central support shaft.
The method of claim 3,
The bevel gears are provided at both ends of each of the pivot shafts. When the bevel gears are gear-engaged with the bevel gears of the adjacent pivot shafts so that rotational force is generated in one of the bevel gears, To rotate with the same angle with respect to the center of the central support shaft.
5. The method of claim 4,
Wherein the central supporting shaft is provided with a plurality of elastic bodies corresponding to the supporting rods and coupling the central supporting shaft and the supporting rods,
Wherein each of the elastic members has elasticity such that one end of the support member to which the elastic member is connected is elastically circumferentially oriented from the center of the center support shaft.
6. The method of claim 5,
And the other ends of the support rods are bent outwardly of the central support shaft about a pivotal axis to which the support rods are connected,
Each of the elastic members connects the other end of the support and the central support shaft and the other end of the support is elastic in the direction of the center of the center support shaft so that one end of the support is elastic in the outer direction from the center of the center support shaft Features centering device.
The method according to claim 6,
Wherein one end of each of the support rods is provided with a rotating member which rotates while rubbing against the inner surface of the tube when the tube is inserted into the tube.
KR1020150090252A 2015-06-25 2015-06-25 Hollow type centering apparatus KR20170000972A (en)

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KR1020150090252A KR20170000972A (en) 2015-06-25 2015-06-25 Hollow type centering apparatus

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200020282A (en) * 2018-08-17 2020-02-26 삼성중공업 주식회사 Pipeline driving robot enhanced supporting force of pipe wall surface
CN110864655A (en) * 2019-11-07 2020-03-06 中国石油天然气集团公司管材研究所 Casing drift diameter thickness measuring device and sorting and repairing method for old stored casings
CN111571080A (en) * 2020-06-01 2020-08-25 刘俊 Circular pipeline inner wall girth welding robot

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200020282A (en) * 2018-08-17 2020-02-26 삼성중공업 주식회사 Pipeline driving robot enhanced supporting force of pipe wall surface
CN110864655A (en) * 2019-11-07 2020-03-06 中国石油天然气集团公司管材研究所 Casing drift diameter thickness measuring device and sorting and repairing method for old stored casings
CN111571080A (en) * 2020-06-01 2020-08-25 刘俊 Circular pipeline inner wall girth welding robot
CN111571080B (en) * 2020-06-01 2022-03-22 安徽盈创石化检修安装有限责任公司 Circular pipeline inner wall girth welding robot

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