KR102000848B1 - Pig for inspecting pipeline - Google Patents

Abstract

The pipe inspection pig according to an embodiment of the present invention is a gas body coupled to the gas flow direction of the fuselage, the sensing unit for driving the inside of the pipe in the gas flow direction and the sensing unit for sensing the inner circumferential surface of the pipe radially coupled to the gas flow direction A front drive cup for transmitting the flow direction pressure to the fuselage, coupled to the front drive cup in the longitudinal central axis direction of the pipe, the guide to form a moving axis of the fuselage coaxially with the longitudinal central axis of the pipe The rear cup is coupled to the center cup and the center cup to be spaced apart in the axial direction, and the gas flow hole for transmitting a gas flow direction pressure in the pipe portion to the body portion and flows some gas to the front drive cup It includes; one end of the center cup to the inner peripheral surface of the pipe to drive along with the fuselage along the inner peripheral surface of the pipe The combination cup once the center along the edge a plurality of ball transfer module corresponding, there is an effect that it is possible to guide with minimal friction body portion move the axis coaxial with the central axis direction of the pipe.

Description

Pig for inspecting pipeline

One embodiment of the present invention relates to a pipe inspection pig.

In general, the pig (pig) is inserted into the pipe and proceeds into the pipe under the pressure of the conveying fluid flowing along the pipe, it is designed to perform the defect, cleaning, and other abnormal analysis of the pipe.

 For example, in order to prevent gas accidents caused by corrosion of pipes, the corrosion condition of pipes should be periodically checked and replaced.In order to check the corrosion condition of pipes most reliably, intelligent pig To inspect the pipe.

Intelligent Pig is a term used to describe the equipment developed to detect the pipe state while using the flow of fluid (gas, oil, water, etc.) in the pipe as described above, nondestructive inspection equipment and computers, etc. You can find out all the conditions of the pipe by linking. Intelligent pigs are divided into geometric pigs and magnetic flux leakage pigs, which measure the pipe distortion, pipe thickness, and radius of curvature. Measures metal losses caused by pipe corrosion and external damage.

Most of these intelligent pigs are driven through the pipeline through the flow pressure by the flow of gas in the pipeline, and in order to sense the inner circumferential surface of the pipeline, the intelligent pigtail can drive even more stable driving center guide and low pressure flow gas. There is a need for friction reduction techniques.

JP 1994-66776 A

The pipe inspection pig according to an embodiment of the present invention is a pipe inspection that can more effectively and reliably sense the inner circumferential surface of the pipe by guiding through the center cup coaxially the moving shaft and the pipe central axis of the pig to inspect the inside of the pipe It is for providing a pig.

In addition, the center cup is divided into a plurality of center cups to minimize the deformation of the center cup due to the deformation of the inner peripheral surface of the pipe, and each of the divided cup wings to maintain the supporting force, so that the entire center cup to guide the moving shaft in the running direction of the pig stable You can do it.

In addition, through the bolt cupper module of one end of the center cup effectively cope with deformation in various directions in the moving direction of the pig, effectively guides the moving direction of the pig shaft moving direction, and the elastic support structure in the vertical direction of each of the moving direction of the bolt transfer module Through the guide of the moving axis of the center cup can be more effective.

In addition, the bolt transfer module is coupled to one end of the center cup to minimize the friction between the center cup and the inner peripheral surface of the pipe when the pig moves inside the pipe.

Piping inspection pig according to an embodiment of the present invention, the body is coupled to the gas flow direction of the fuselage, the sensing unit for driving the inside of the pipe in the gas flow direction and the sensing unit for sensing the inner peripheral surface of the pipe in a radial direction A front drive cup for transmitting a gas flow direction pressure to the fuselage portion, coupled to the front drive cup in the longitudinal central axis direction of the pipe, so as to form a moving shaft of the fuselage coaxially with the longitudinal central axis of the pipe The rear side is coupled to the center cup and the center cup to be guided apart in the direction of the moving shaft, and the gas flow hole for transmitting a gas flow direction pressure inside the pipe to the fuselage, but flows some gas to the front drive cup And a driving cup, wherein one end of the center cup is in the pipe to drive together with the fuselage along the inner circumferential surface of the center cup. A plurality of bolt transfer module is coupled along one end of the center cup corresponding to the main surface.

Here, the center cup is formed adjacent to the front driving cup and is formed adjacent to the first center cup and the rear driving cup to guide the moving shaft direction of the front of the body portion to guide the moving shaft direction of the rear of the body portion. Further comprising a second center cup, wherein the first center cup is formed with a plurality of divided first cup wings in the radial direction perpendicular to the axis of movement, the second center cup is radiated perpendicular to the axis of movement A plurality of divided second cup wings are formed in a direction, and the first bolt transfer module and the second bolt lance module are coupled to respective ends corresponding to the inner circumferential surface of the pipe portion of the first cup wing and the second cup wing. Can be.

In addition, the first center cup and the second center cup may be formed of a urethane material, and may have a hardness greater than that of the front driving cup and the rear driving cup.

In addition, the first bolt transfer module and the second bolt transfer module coupled to one end of the first cup blade and the second cup blade portion so as to contract and relax a predetermined interval in a direction perpendicular to the direction of the moving shaft of the fuselage portion. It can be elastically supported.

In addition, the first bolt transfer module is coupled to the first cup blade portion is inserted into the inner end of the first sliding, the first sliding formed in a predetermined length in a direction perpendicular to the direction of the moving shaft of the fuselage on the inner side surfaces of the first cup blade portion First protrusions are formed at both sides thereof so that both ends thereof are coupled to the groove, and the first elastic support is elastic at the inner lower end portion of the first cup blade to contract and relax the first bolt transfer module in a direction perpendicular to the moving shaft direction. The second bolt transfer module is inserted into and coupled to one end of the second cup blade part, and the second cup wing part has a predetermined length in a direction perpendicular to the moving shaft direction on both inner sides of the second cup wing part. Second protrusions are formed on both sides of the sliding groove so that both ends thereof are coupled to each other, and a second elastic support is formed on the inner lower end of the second cup wing to form the second bolt transfer module. It can elastically support to contract and relax in a direction perpendicular to the direction of the movement axis.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, the terms or words used in this specification and claims are not to be interpreted in a conventional and dictionary sense, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Pipe inspection pig according to an embodiment of the present invention to increase the hardness of the center cup that can guide the moving central axis of the pig coaxially with the central axis of the pipe for uniform sensing of the inner peripheral surface of the pipe while traveling inside the pipe In addition to effectively increasing the reliability of the guide, the contact portion of the inner circumferential surface of the pipe by combining the bolt transfer module has the effect that can be realized at the same time low friction.

In addition, the center cup is not only effective in transmitting gas flow pressure to the front driving cup through the gas flow hole of the rear driving cup by forming a plurality of radially divided cup wings, but also in each of the plurality of divided cup wings. In addition, by receiving a support force on the inner circumferential surface of the pipe separately, it is not possible to reduce the bearing capacity of the entire center cup due to an irregular protrusion or obstacle of any part of the inner circumferential surface of the pipe, thereby effectively increasing the reliability of the moving shaft guide of the pig apparatus.

In addition, the elastic support is coupled to the lower end of the bolt transfer module to allow the predetermined length of contraction and relaxation to the inner surface of the pipe (direction perpendicular to the moving axis of the pig) to each of the plurality of cup wings divided in the radial direction of the center cup. By doing so, there is an effect of maintaining the axial support force of the entire center cup even in the deformation of a specific portion of the inner peripheral surface of the pipe.

In addition, by transferring the gas flow pressure partly to the front drive cup through the gas flow hole of the rear drive cup, the pig is moved by the propulsion force of the entire drive cup, thereby minimizing the vibration of the whole pig or the vibration of the rear drive cup. There is an effect that can increase the reliability.

1 is a perspective view of a pipe inspection pig in accordance with an embodiment of the present invention;
2 is a side view of FIG. 1;
Figure 3 is an exploded perspective view of a portion of the piglet for pipe inspection according to an embodiment of the present invention;
4 is a perspective view of a center cup according to an embodiment of the present invention;
5 is a side view of the center cup of FIG. 4;
Figure 6 is a side view of the center cup according to another embodiment of the present invention
7 is a front cross-sectional view of a portion A of FIG. 6.

The objects, specific advantages and novel features of one embodiment of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings. In the present specification, in adding reference numerals to the components of each drawing, it should be noted that the same components as possible, even if displayed on different drawings have the same number as possible. In addition, terms such as “one side”, “other side”, “first”, “second”, etc. are used to distinguish one component from another component, and a component is limited by the terms. no. Hereinafter, in describing one embodiment of the present invention, detailed descriptions of related well-known techniques that may unnecessarily obscure the subject matter of one embodiment of the present invention will be omitted.

Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention will be described in detail, the same reference numerals refer to the same members.

1 is a perspective view of a pipe inspection pig according to an embodiment of the present invention, Figure 2 is a side view of Figure 1, Figure 3 is a partially exploded perspective view of a pipe inspection pig according to an embodiment of the present invention, Figure 4 is A perspective view of a center cup according to an embodiment of the present invention, Figure 5 is a side view of the center cup of FIG.

Piping inspection pig 1 according to an embodiment of the present invention is a fuselage part 10, the fuselage part 10 is coupled to the sensing unit for driving the inside of the pipe in the gas flow direction and the sensing unit for sensing the inner peripheral surface of the pipe in a radial direction Coupled to the front of the gas flow direction of the front drive cup 20 for transmitting a gas flow direction pressure to the body portion 10, the front drive cup 20 is coupled in the longitudinal central axis direction of the pipe, It is coupled to the center cup 40 and the center cup 40 to be guided so that the moving shaft of the body portion 10 is formed coaxially with the longitudinal central axis of the pipe spaced apart in the moving axis direction, the inside of the pipe And a rear driving cup 30 configured to transmit a gas flow direction pressure of the gas flow direction to the body part 10, and a gas flow hole 31 for flowing a portion of the gas into the front driving cup 20. One end of the 40 along the inner circumferential surface of the pipe A plurality of bolt transfer module 50 is coupled along one end of the center cup 40 corresponding to the inner circumferential surface of the pipe to drive together with the body portion 10.

1 and 2, the pipe inspection pig 1 according to an embodiment of the present invention senses the state of the inner circumferential surface of the pipe through the sensing unit 11 while traveling inside the pipe. It is to check the reliability inside the pipe by measuring the pipe dent, change in pipe thickness and radius of curvature.

First, in the present specification, the axis centered in the direction in which the pipe inspection pig 1 travels is defined as a 'moving axis' (see 'X' in FIG. 1), and a gas is formed in the center of the pipe, that is, inside the pipe. The central axis in the flowing longitudinal direction will be defined as the 'center axis'.

1 and 2, the sensing unit 11 for inspecting the inside of the pipe is coupled to the body 10 to travel in the gas flow direction. The premise pipe inspection pig 1 is formed in a substantially cylindrical shape so as to correspond to the shape of the inside of the pipe, and a sensing unit 11 for sensing the inner circumferential surface of the pipe in a radial direction perpendicular to the moving axis direction in which the fuselage part 10 moves is provided. A plurality of individual sensing are combined. The fuselage part 10 is a member constituting the skeleton of the pipe inspection pig 1, and includes a cleaning device on the inner surface of the pipe, a traveling distance measuring device, a leakage magnet detecting device, a collection and transmission device for measuring data, an abnormality diagnosis device for piping, and the like. By being installed together with the sensing unit 11, it is possible to change various designs according to the use of the pipe inspection.

In addition, the fuselage part 10 has a moving shaft of the fuselage part 10 in order for the driving cups 20 and 30 to transmit gas flow pressure and the sensing part 11 of the fuselage part 10 to smoothly sense the inner circumferential surface of the pipe. And a center cup 40 capable of guiding the longitudinal central axis of the pipe while moving coaxially.

As shown in FIG. 3, the front driving cup 20 is coupled to the body portion 10 in the front portion in the gas flow direction of the body portion 10. The front drive cup 20 may be manufactured in a rough cup shape in which a groove is formed in which a gas is received in the rear direction to properly receive the gas introduced in the gas flow direction and transmit the pressure to the driving force of the fuselage unit 10. It is coupled to be in close contact with the inner peripheral surface of the pipe. In addition, the material is formed of a urethane material in order to effectively transmit the flow pressure of the gas may be a material of low hardness in order to reduce the frictional force with the inner peripheral surface of the pipe during the movement. By doing so, the front drive cup 20 is capable of effectively transferring the flow pressure of the gas flowing into the pipe to the body 10 by sealing between the pipe inner surface of the pipe.

In addition, the rear driving cup 30 may be coupled to the rear portion of the fuselage part 10 to transmit the gas flow pressure inside the pipe to the fuselage part 10 like the front drive cup 20. In this case, a plurality of gas flow holes 31 may be formed in the rear driving cup 30. The rear driving cup 30 is also sealed to be in close contact with the inner circumferential surface of the pipe to transmit the flow pressure of the gas flowing in the pipe to the body portion 10. If the flow pressure of all the gas only the rear driving cup 30 to the body portion ( When the rear wheel drive to be transmitted to 10) there is a fear that the vibration of the moving body portion 10 itself is generated, it is difficult to transmit a stable propulsion and sensing inside the pipe. Therefore, in order to receive the entire gas flow pressure evenly and to use the propulsion force in the fuselage part 10, some flow gas flows through the gas flow hole 31 to the front drive cup 20 to partially drive the gas flow pressure to the front drive. The cup 20 is to be delivered. By doing so, the gas flow pressure is converted into propulsion force in the entire portion of the body portion 10 in a balanced manner so that stable running of the pig 1 in the pipe can be performed.

Other coupling relationship or material is the same as the front drive cup 20, so the duplicate description will be omitted.

The center cup 40 coupled to the moving shaft direction of the front driving cup 20 serves to guide the moving shaft to be movable on the coaxial line with the central axis inside the pipe between the movements of the body portion 10. As shown in FIG. 3, the center cup 40 is adjacent to the rear surface of the front driving cup 20 and the second center cup 42 adjacent to the front surface of the first center cup 41 and the rear driving cup 30. These may be combined, but in addition to the illustrated position or number of the center cup 40 is not particularly limited.

One end of the center cup 40 is formed to contact the inner circumferential surface of the pipe, the bolt transfer module 50 is coupled to the contact point can move with the fuselage 10 while minimizing the friction force. In order to effectively guide the moving shaft of the fuselage part 10, a urethane material such as the drive cups 20 and 30 is applied, but by applying a urethane material of greater hardness than the hardness of the drive cups 20 and 30, the fuselage part 10 ) Can be effectively guided on the central axis inside the pipe. By coupling the bolt transfer module 50 to a plurality of positions corresponding to one end of the center cup 40 along the inner circumferential surface of the center cup 40, it is easy to cope not only with the moving direction of the body portion 10 but also in various directions due to the deformation of the inner circumferential surface of the pipe. And, accordingly, the guide of the moving shaft of the body portion 10 can be stably maintained.

As shown in FIG. 3 and FIG. 4, the first center cup 41 and the second center cup 42 are divided into a plurality of first cups in a radial direction perpendicular to the moving axis direction of the fuselage part 10 to which the first center cup 41 and the second center cup 42 are coupled. It may be formed of a wing portion 41a and a second cup wing portion 42a.

4 and 5, the first center cup 41 is formed of a plurality of divided first cup wings 41a, one end of each of the first cup wings 41a, that is, the pipe ( P) Each of the first bolt transfer module 51 may be disposed at a position to contact and drive the inner circumferential surface In. Therefore, each of the divided first cup blade portions 41a supports the internal pressure according to the deformed form of the inner circumferential surface In of the pipe P, and transfers the force to the adjacent first cup blade portions 41a. By effectively blocking the moving shaft according to the movement of the body portion 10 can be stably guided in the direction of the central axis inside the pipe. Since the second center cup 42 also has the same shape and structure as the first center cup 41, the overlapping descriptions of the second cup blade 42a and the second bolt transfer module 52 will be omitted.

In addition, since the first center cup 41 and the second center cup 42 are formed of a plurality of first cup blades 41a and second cup blades 42a, respectively, the rear driving cup 30 is formed. The gas flowing through the gas flow hole 31 of the gas flows smoothly between the divided first cup blades 41a or between the second cup blades 42a to provide a gas flow pressure to the front driving cup 20. There is an advantage that can be delivered effectively.

The first center cup 41 and the second center cup 42 are divided in the radial direction, respectively, so as to support the contact points by bolt transferers on the inner circumferential surface of the pipe, respectively, so that the inner circumferential surface of the pipe that can be generated when all the surfaces are contacted. There is an advantage that can effectively cope with deformation and bending.

6 is a side view of a center cup according to another embodiment of the present invention, and FIG. 7 is a front sectional view of part A of FIG. 6.

Center cup 40 according to another embodiment of the present invention is that the bolt transfer module 50 coupled to one end of each of the divided cup blades is elastically supported coupled to shrink and relax a predetermined distance in the direction of the central axis of the pipe.

As shown in FIG. 6, the first bolt cupper module 51 of the first cup blade 41a of the first center cup 41 contacts the inner circumferential surface of the pipe. When moving, when there is deformation or partial bending of the inner circumferential surface of the pipe, the first bolt transfer module 51 of the first cup wing part 41a of the corresponding portion is connected so that the center support of the entire first center cup 41 does not shake. It is coupled to allow the contraction and relaxation at a predetermined interval in the direction of the central axis of the.

Specifically, as shown in FIG. 7, the first bolt transfer module 51 is inserted into and coupled to one end of the first cup blade part 41a, and the body part (eg, on both sides of the inner side of the first cup blade part 41a). First protrusions 51a are formed at both sides of the first sliding groove 61 formed at a predetermined length in a direction perpendicular to the direction of the moving shaft of 10), and inner lower ends of the first cup wings 41a are formed. The first elastic support 71 is to elastically support the first bolt transfer module 51 to contract and relax in a direction perpendicular to the direction of the movement axis.

The sliding length of the first sliding groove 61 on both sides of the inner side of the first cup blade 41a is possible within a range in which the bolt transfer module 50 maintains a height that is movable at least in contact with the inner circumferential surface of the pipe. The first elastic support 71 is coupled to the lower end of the transfer module 51 to cushion the first bolt transfer module 51 in the direction in which the first bolt transfer module 51 contracts and relaxes on the inner circumferential surface of the pipe in accordance with the curved surface (see arrow direction in FIG. 7). It can work.

The first elastic support 71 may be applied to a configuration having a variety of elastic support, by adjusting the elastic modulus of the first elastic support 71 to minimize the repulsive force of the first bolt transfer module 51 and the inner peripheral surface of the pipe Even when the gas flow pressure flowing inside the pipe is low, the resistance of the driving force of the body portion 10 can be minimized.

Similarly, the second bolt transfer module 52 is inserted into and coupled to one end of the second cup blade 42a, and is perpendicular to the moving shaft direction of the body 10 on both inner surfaces of the second cup blade 42a. Second protrusions 52a are formed on both sides of the second sliding grooves 62 formed at predetermined lengths so that both ends thereof are coupled to each other, and a second elastic support 72 is formed at an inner lower end of the second cup blade 42a. The second bolt transfer module 52 may be elastically supported to contract and relax in a direction perpendicular to the moving axis direction. Description of the corresponding corresponding configuration overlaps with the description of the configuration of the first center cup 41 described above, and thus a detailed description thereof will be omitted.

Although the present invention has been described in detail through specific examples, it is intended to describe the present invention in detail, and the present invention is not limited thereto, and should be understood by those skilled in the art within the technical spirit of the present invention. It is obvious that the modifications and improvements are possible.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be apparent from the appended claims.

1: Piping inspection pig 10: Body part
11: sensing unit
20: Front Drive Cup
30: rear drive cup 31: gas flow hole
40: center cup 41: first center cup
41a: first cup wing 42: second center cup
42a: second cup wing 50: bolt transfer module
51: first bolt transfer module 52: second bolt transfer module
51a: first protrusion 52a: second protrusion
61: first sliding groove 62: second sliding groove
71: first elastic support 72: second elastic support
P: Piping In: Piping Inner Periphery

Claims (5)

A fuselage unit in which a sensing unit for driving the inside of the pipe in a gas flow direction and sensing the inner peripheral surface of the pipe is radially coupled;
A front drive cup coupled to the gas flow direction front of the body part to transmit a gas flow direction pressure to the body part;
It is formed adjacent to the front drive cup is coupled in the longitudinal central axis direction of the pipe, guides to form a moving shaft of the front of the body portion coaxial with the longitudinal central axis of the pipe, perpendicular to the moving shaft A first center cup including a plurality of divided first cup wings in a radial direction, through which gas may pass between the first cup wings;
A rear drive cup coupled to the first center cup spaced apart in the moving axis direction and configured to transmit a gas flow direction pressure inside the pipe to the fuselage, and a gas flow hole for flowing some gas to the front drive cup; And
It is formed adjacent to the rear drive cup is coupled in the longitudinal central axis direction of the pipe, guides to form a moving shaft of the rear of the body portion coaxial with the longitudinal central axis of the pipe, perpendicular to the moving shaft And a second center cup including a plurality of divided second cup wings in a radial direction, and allowing gas to pass between the second cup wings.
The first bolt transfer module is coupled to one end of each of the first cup wings corresponding to the inner circumferential surface of the first center cup to drive together with the fuselage while sliding in multiple directions along the inner circumferential surface of the first center cup. Reduces friction between the inner circumferential surface of the pipe and the first center cup;
One end of the second center cup is slid in multiple directions along the inner circumferential surface of the second cup, and the second bolt transfer module is coupled to each one end of the second cup wing portion corresponding to the inner circumferential surface of the pipe so as to drive together with the fuselage. Reduce friction between the inner circumferential surface of the pipe and the second center cup,
Delivers a gas flow pressure to the front driving cup such that the gas moved through the gas flow hole moves between the divided first cup wings and between the second cup wings;
The first center cup and the second center cup are formed of a urethane material, and have a hardness greater than that of the front driving cup and the rear driving cup, so that the front driving cup and the rear driving cup are in the tube inner surface of the pipe. The first bolt transfer module and the second bolt transfer module is in contact with the inner circumferential surface of the pipe while sealing the, the pipe inspection pig. delete delete The method according to claim 1,
The first bolt transfer module and the second bolt transfer module coupled to one end of the first cup wing and the second cup wing are elastically supported to contract and relax at a predetermined interval in a direction perpendicular to the moving shaft direction of the body part. Piping inspection pig The method according to claim 4,
The first bolt transfer module is inserted into and coupled to one end of the first cup blade part, and is formed on a first sliding groove formed at a predetermined length in a direction perpendicular to a moving shaft direction on both inner surfaces of the first cup blade part. First protrusions are formed at both sides to couple both ends thereof, and a first elastic support is elastically supported to contract and relax the first bolt transfer module in a direction perpendicular to the direction of the moving shaft at an inner lower end of the first cup blade. ,
The second bolt transfer module is inserted into and coupled to one end of the second cup blade part, and is formed on a second sliding groove formed at a predetermined length in a direction perpendicular to a moving axis direction of the body part on both inner surfaces of the second cup wing part. The second protrusions are formed at both sides such that both ends thereof are coupled to each other, and the second elastic support is elastically supporting the second bolt transfer module to contract and relax in a direction perpendicular to the direction of the moving shaft at the inner lower end of the second cup blade. Piping inspection pigtail.

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