CN215953470U

CN215953470U - Pipeline internal defect detection mechanism

Info

Publication number: CN215953470U
Application number: CN202020320214.8U
Authority: CN
Inventors: 杨玉
Original assignee: Dtaic Inspection Equipment Suzhou Co ltd
Current assignee: Dtaic Inspection Equipment Suzhou Co ltd
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2022-03-04
Anticipated expiration: 2030-03-16

Abstract

The utility model discloses a pipeline internal defect detection mechanism which comprises a first cylinder, a second cylinder, a plurality of numerical control boxes arranged on the outer surface of the first cylinder, a plurality of first probes arranged on the outer surface of the second cylinder and a plurality of first magnetic steels, wherein the first cylinder and the second cylinder are connected through a chain, the plurality of numerical control boxes are arranged at equal intervals along the circumferential direction of the first cylinder, the plurality of first probes are arranged at equal intervals along the circumferential direction of the second cylinder, the first probes are electrically connected with the numerical control boxes, a first fillet groove is formed in an acute angle formed between a lower bottom and a first side in four corners of a parallelogram elastic support, and a third fillet groove is formed in the outer surface of a second side of the parallelogram elastic support. The device has a larger bending space, can ensure enough turning radius when the device turns, and can avoid the influence on the motion stability of the device caused by lateral rebound acting force or internal stress generated when the device turns.

Description

Pipeline internal defect detection mechanism

Technical Field

The utility model relates to a mechanism for detecting defects in a pipeline, and belongs to the technical field of pipeline detection.

Background

The pipeline is an important facility for transporting liquid and gas, and is widely applied to water supply, water drainage, heat supply, gas supply, long-distance petroleum and natural gas transportation, agricultural irrigation, hydraulic engineering and various industrial devices, the pipeline is easy to generate different degrees of damage deformation after being used for a long time, the efficiency of oil and gas transportation is reduced, the loss is increased due to leakage generated in the transportation process, and meanwhile, serious potential safety hazards are caused, so that the pipeline is necessary to be regularly detected, the integrity and the peripheral safety of the pipeline are guaranteed, the operation management risk of the pipeline is reduced, and the occurrence of operation production accidents is reduced.

In the prior art, a magnetic leakage detection method is usually adopted to detect the characteristics, the length and the like of the inner wall and the outer wall of the pipeline and the pipeline, when the ferromagnetic steel pipe is fully magnetized, the magnetic force lines in the pipe wall are blocked by the defects on the surface or the position close to the surface of the ferromagnetic steel pipe, the magnetic force lines at the defects are distorted, and part of the magnetic force lines leak out of the inner surface and the outer surface of the ferromagnetic steel pipe to form a magnetic leakage field for detection.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pipeline internal defect detection mechanism which has a larger bending space in a magnetic flux leakage detection device, can ensure a sufficient turning radius when the device turns, and can avoid the influence of lateral rebound acting force or internal stress on the motion stability of the device when the device turns.

In order to achieve the purpose, the utility model adopts the technical scheme that: a pipeline internal defect detection mechanism comprises a first barrel, a second barrel, a plurality of numerical control boxes arranged on the outer surface of the first barrel, a plurality of first probes arranged on the outer surface of the second barrel and a plurality of first magnetic steels, wherein the first barrel and the second barrel are connected through a chain;

a first front flange and a first rear flange are respectively connected to the front end face and the rear end face of the first cylinder, a first front leather cup is sleeved on the first front flange, a first rear leather cup is sleeved on the first rear flange, and the first front leather cup and the first rear leather cup are in interference fit with the inner wall of the pipeline in the circumferential direction;

a second front flange and a second rear flange are respectively connected to the front end face and the rear end face of the second cylinder, a second front leather cup is sleeved on the second front flange, and a second rear leather cup is sleeved on the second rear flange;

the first rear flange is connected with the second front flange through the chain, a plurality of mileage wheels are mounted on the second rear flange, and the mileage wheels are in contact connection with the inner wall of the pipeline;

the first probe further comprises a parallelogram elastic support and a sensor arranged on the support, the lower surface of the elastic support is arranged on the second barrel, an installation gap is formed in the upper surface of the elastic support, an insulating sleeve is coated on the outer side of the sensor and embedded into the installation gap and fixedly connected with the upper surface of the elastic support, a wear-resistant layer is connected to the upper surface of the insulating sleeve, and the upper surface of the wear-resistant layer is slightly higher than the upper surface of the elastic support, so that the upper surface of the wear-resistant layer is tightly attached to the inner wall of the pipeline;

in four corners of the parallelogram elastic support, a first fillet groove is formed at an acute angle formed between the lower bottom and the first side edge, a third fillet groove is formed on the outer surface of the second side edge of the parallelogram elastic support, and the third fillet groove is close to an obtuse angle formed between the upper bottom and the second side edge of the parallelogram elastic support;

the chain is formed by connecting at least two metal rings, a first mounting head is arranged on a first rear flange connected with the first barrel, a second mounting head is arranged on a second front flange connected with the second barrel, the first mounting head and the second mounting head respectively penetrate through a first rear pressing plate on the first barrel and a second front pressing plate on the second barrel and are connected with two ends of the chain, the metal ring at one end of the chain is embedded into the first mounting head and is connected with the first mounting head through a first pin, and the metal ring at the other end of the chain is embedded into the second mounting head and is connected with the second mounting head through a second pin.

The further improved scheme in the technical scheme is as follows:

1. in the scheme, the chain is coated with a flexible sleeve.

2. In the above scheme, the flexible sleeve is a cylindrical polyurethane sleeve.

3. In the scheme, the number of the metal rings is 3-6.

4. In the above scheme, two ends of the flexible sleeve are respectively embedded into the first mounting head and the second mounting head.

5. In the above scheme, the inner surface of the first side edge is further provided with a second fillet groove, and the second fillet groove is close to an obtuse angle formed between the upper bottom and the first side edge.

6. In the above scheme, the sensor includes a hall sensor and an eddy current sensor.

7. In the scheme, the wear-resistant layer is a chromium oxide ceramic sheet.

8. In the above scheme, batteries are installed in the first cylinder and the second cylinder.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

1. the in-pipeline defect detection mechanism can move in a pipeline with 15% of deformation, accurately detect the defects in the passing pipeline in the axial direction, effectively identify the defect positions, defect properties and the like of the pipeline, and provide accurate data guidance for the maintenance of the pipeline.

2. According to the in-pipeline defect detection mechanism, the probe structure is arranged, so that the upper surface of the probe can be always in interference with the inner wall of the pipeline to be tested, namely the probe and the inner wall of the pipeline are always in a tight fit state, and the detection precision of the in-sleeve sensor is ensured; furthermore, a first round angle groove is formed in an acute angle formed between the lower bottom and the first side edge in four corners of the parallelogram elastic support, and the arrangement of the round angle groove enables the elastic support to have a buffer area when being extruded in a pipeline, so that the situations that the support cannot rebound due to local fracture or over yield strength caused by overlarge and over-concentrated stress generated when the elastic support is rapidly extruded are avoided, the close fit of the probe and the inner wall of the pipeline can be further ensured after the equipment is used for a long time, and the detection precision is ensured; furthermore, a third fillet groove is formed in the outer surface of the second side edge of the parallelogram elastic support, the third fillet groove is close to an obtuse angle formed between the upper bottom of the parallelogram elastic support and the second side edge, and the third fillet groove is arranged, so that the elastic support has a self-adaptive adjusting space in the extruding process, the probe is guaranteed to be in surface contact with the inner wall of the pipeline all the time, the position of the sensor is kept parallel to the inner surface of the pipeline all the time, and the detection precision of the pipeline is further improved.

3. The defect detection mechanism in the pipeline is connected with the two cylinders through the chains, so that the connection of the cylinders is realized, the transmission of driving force between the cylinders is facilitated, and the mechanism has a larger bending space, so that the device can smoothly pass through a bend and still keep the mutual pulling force when passing through the bend.

Drawings

FIG. 1 is a schematic structural view of a defect detection mechanism in a pipeline according to the present invention;

FIG. 2 is a cross-sectional view of the in-pipe defect detection mechanism of the present invention;

FIG. 3 is a partial cross-sectional view of the internal pipe defect inspection mechanism of the present invention;

FIG. 4 is a schematic view of a chain structure of the inner defect detecting mechanism of a pipe according to the present invention;

FIG. 5 is a sectional view of a chain structure of the mechanism for detecting defects in pipes according to the present invention;

FIG. 6 is a schematic structural view of a probe of the mechanism for detecting defects in a pipeline.

In the above drawings: 1. a first cylinder; 2. a second cylinder; 3. a numerical control box; 4. a first probe; 5. a first magnetic steel; 6. a chain; 7. a first front flange; 8. a first rear flange; 9. a first front leather cup; 901. a first front platen; 902. a first front bolt; 1001. a first rear platen; 1002. a first rear bolt; 10. a first rear leather cup; 11. a second front flange; 12. a second rear flange; 13. a second front leather cup; 14. a second rear leather cup; 15. a mileage wheel; 16. a magnetic ring; 1a, an elastic bracket; 3a, an insulating sleeve; 4a, a wear-resistant layer; 5a, a first fillet groove; 6a, a second fillet groove; 7a, a third fillet groove; 351. a metal ring; 36. a first mounting head; 37. a second mounting head; 39. a second pin.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

Example 1: a pipeline internal defect detection mechanism comprises a first barrel body 1, a second barrel body 2, a plurality of numerical control boxes 3 arranged on the outer surface of the first barrel body 1, a plurality of first probes 4 arranged on the outer surface of the second barrel body 2 and a plurality of first magnetic steels 5, wherein the first barrel body 1 is connected with the second barrel body 2 through a chain 6, the plurality of numerical control boxes 3 are arranged at equal intervals along the circumferential direction of the first barrel body 1, the plurality of first probes 4 are arranged at equal intervals along the circumferential direction of the second barrel body 2, the first probes 4 are electrically connected with the numerical control boxes 3, the plurality of first magnetic steels 5 are evenly divided into two groups, each group of first magnetic steels 5 are respectively and continuously arranged along the circumferential direction of the second barrel body 2, steel brushes are evenly and densely distributed on each first magnetic steel 5 so as to form two magnetic rings 16, the two magnetic rings 16 are respectively positioned at two sides of a probe ring formed by the first probes 4 arranged along the circumferential direction of the second barrel body 2, a magnetic field is generated by the magnetic block, and magnetic conduction is realized by the steel brush;

a first front flange 7 and a first rear flange 8 are respectively connected to the front end face and the rear end face of the first cylinder 1, a first front leather cup 9 is sleeved on the first front flange 7, a first rear leather cup 10 is sleeved on the first rear flange 8, and the first front leather cup 9 and the first rear leather cup 10 are in interference fit with the inner wall of the pipeline in the circumferential direction;

the first front leather cup 9 is fixedly connected with the first front flange 7 through a first front pressing plate 901, the first rear leather cup 10 is fixedly connected with the first rear flange 8 through a first rear pressing plate 1001, a plurality of first front bolts 902 sequentially penetrate through the first front pressing plate 901, the first front leather cup 9 and the first front flange 7 and are fixedly connected with the front end face of the first cylinder 1, and a plurality of first rear bolts 1002 sequentially penetrate through the first rear pressing plate, the first rear leather cup 1001 10 and the first rear flange 8 and are fixedly connected with the rear end face of the first cylinder 1;

a second front flange 11 and a second rear flange 12 are respectively connected to the front end face and the rear end face of the second cylinder 2, a second front leather cup 13 is sleeved on the second front flange 11, and a second rear leather cup 14 is sleeved on the second rear flange 12;

the first rear flange 8 is connected with the second front flange 11 through the chain 6, the second rear flange 12 is provided with a plurality of mileage wheels 15, and the mileage wheels 15 are in contact connection with the inner wall of the pipeline;

the first probe 4 further comprises a parallelogram-shaped elastic support 1a and a sensor arranged on the support 1a, the lower surface of the elastic support 1a is arranged on the second cylinder 2, an installation gap is formed in the upper surface of the elastic support 1a, an insulating sleeve 3a covers the outer side of the sensor, the insulating sleeve 3a is embedded into the installation gap and fixedly connected with the upper surface of the elastic support 1a, a wear-resistant layer 4a is connected to the upper surface of the insulating sleeve 3a, and the upper surface of the wear-resistant layer 4a is slightly higher than the upper surface of the elastic support 1a, so that the upper surface of the wear-resistant layer 4a is tightly attached to the inner wall of the pipeline;

in four corners of the parallelogram elastic support 1a, a first fillet groove 5a is formed at an acute angle formed between the lower bottom and the first side edge, a third fillet groove 7a is formed on the outer surface of the second side edge of the parallelogram elastic support 1a, and the third fillet groove 7a is close to an obtuse angle formed between the upper bottom and the second side edge of the parallelogram elastic support 1 a;

the chain 6 is formed by connecting at least two metal rings 351, a first mounting head 36 is arranged on a first rear flange 8 connected with the first barrel 1, a second mounting head 37 is arranged on a second front flange 11 connected with the second barrel 2, the first mounting head 36 and the second mounting head 37 respectively penetrate through a first rear pressing plate 1001 on the first barrel 1 and a second front pressing plate 18 on the second barrel 2 and are connected with two ends of the chain 6, the metal ring 351 at one end of the chain 6 is embedded into the first mounting head 36 and is connected with the first mounting head 36 through a first pin, and the metal ring 351 at the other end of the chain 6 is embedded into the second mounting head 37 and is connected with the second mounting head 37 through a second pin 39.

The chain 6 is covered with a flexible sleeve; the flexible sleeve is a cylindrical polyurethane sleeve; the number of the metal rings 351 is 3; the two ends of the flexible sleeve are respectively embedded into the first mounting head 36 and the second mounting head 37; the inner surface of the first side is also provided with a second fillet groove 6a, and the second fillet groove 6a is close to an obtuse angle formed between the upper bottom and the first side.

Example 2: a pipeline internal defect detection mechanism comprises a first barrel body 1, a second barrel body 2, a plurality of numerical control boxes 3 arranged on the outer surface of the first barrel body 1, a plurality of first probes 4 arranged on the outer surface of the second barrel body 2 and a plurality of first magnetic steels 5, wherein the first barrel body 1 is connected with the second barrel body 2 through a chain 6, the plurality of numerical control boxes 3 are arranged at equal intervals along the circumferential direction of the first barrel body 1, the plurality of first probes 4 are arranged at equal intervals along the circumferential direction of the second barrel body 2, the first probes 4 are electrically connected with the numerical control boxes 3, the plurality of first magnetic steels 5 are evenly divided into two groups, each group of first magnetic steels 5 are respectively and continuously arranged along the circumferential direction of the second barrel body 2, steel brushes are evenly and densely distributed on each first magnetic steel 5 so as to form two magnetic rings 16, the two magnetic rings 16 are respectively positioned at two sides of a probe ring formed by the first probes 4 arranged along the circumferential direction of the second barrel body 2, a magnetic field is generated by the magnetic block, and magnetic conduction is realized by the steel brush;

The number of the metal rings 351 is 6; the sensor comprises a Hall sensor and an eddy current sensor, wherein the Hall sensor is used for sensing magnetic fields in three directions, and the eddy current sensor is used for monitoring whether the defects of the pipeline are positioned inside or outside the pipeline; the wear-resistant layer 4a is a chromium oxide ceramic wafer; batteries are arranged in the first cylinder 1 and the second cylinder 2.

By adopting the in-pipeline defect detection mechanism, the in-pipeline defect detection mechanism can move in a pipeline with 15% of deformation, accurately detect the axial defects in the passing pipeline, effectively identify the defect positions, defect properties and the like of the pipeline, and provide accurate data guidance for the maintenance of the pipeline;

in addition, the arrangement of the probe structure can ensure that the upper surface of the probe always keeps interference with the inner wall of the pipeline to be tested, namely the probe always keeps a close fit state with the inner wall of the pipeline, thereby ensuring the detection precision of the sensor in the sleeve head;

furthermore, due to the arrangement of the fillet groove, the elastic support is provided with a buffer area when being extruded in the pipeline, the situations that the elastic support cannot rebound due to local fracture or over yield strength caused by overlarge and over-concentrated stress generated when being rapidly extruded are avoided, the close fit of the probe and the inner wall of the pipeline can be further ensured after the equipment is used for a long time, and the detection precision is ensured;

furthermore, the third fillet groove enables the elastic support to have a self-adaptive adjusting space in the extrusion process, so that the probe is ensured to be always in surface contact with the inner wall of the pipeline, namely the position of the sensor is always kept parallel to the inner surface of the pipeline, and the detection precision of the pipeline is further improved;

in addition, the two cylinders are connected through the chains, so that the connection of the cylinders is realized, the conduction of driving force between the cylinders is facilitated, and a larger bending space is provided, so that the device can smoothly pass through a bend and still keep the pulling force between the cylinders when passing through the bend.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a defect detection mechanism in pipeline which characterized in that: the magnetic control device comprises a first barrel body (1), a second barrel body (2), a plurality of numerical control boxes (3) arranged on the outer surface of the first barrel body (1), a plurality of first probes (4) and a plurality of first magnetic steels (5) arranged on the outer surface of the second barrel body (2), wherein the first barrel body (1) is connected with the second barrel body (2) through a chain (6), the plurality of numerical control boxes (3) are arranged at equal intervals along the circumferential direction of the first barrel body (1), the plurality of first probes (4) are arranged at equal intervals along the circumferential direction of the second barrel body (2), the first probes (4) are electrically connected with the numerical control boxes (3), the plurality of first magnetic steels (5) are averagely divided into two groups, each group of first magnetic steels (5) are respectively arranged continuously along the circumferential direction of the second barrel body (2), and steel brushes are uniformly and densely distributed on each first magnetic steel (5) to form two magnetic rings (16), the two magnetic rings (16) are respectively positioned at two sides of a probe ring formed by the first probe (4) arranged along the circumferential direction of the second cylinder (2);

a first front flange (7) and a first rear flange (8) are respectively connected to the front end face and the rear end face of the first barrel (1), a first front leather cup (9) is sleeved on the first front flange (7), a first rear leather cup (10) is sleeved on the first rear flange (8), and the first front leather cup (9) and the first rear leather cup (10) are in interference fit with the inner wall of the pipeline in the circumferential direction;

a second front flange (11) and a second rear flange (12) are respectively connected to the front end face and the rear end face of the second barrel (2), a second front leather cup (13) is sleeved on the second front flange (11), and a second rear leather cup (14) is sleeved on the second rear flange (12);

the first rear flange (8) is connected with the second front flange (11) through the chain (6), the second rear flange (12) is provided with a plurality of mileage wheels (15), and the mileage wheels (15) are in contact connection with the inner wall of the pipeline;

the first probe (4) further comprises a parallelogram-shaped elastic support (1 a) and a sensor arranged on the support (1 a), the lower surface of the elastic support (1 a) is arranged on the second cylinder body (2), an installation gap is formed in the upper surface of the elastic support (1 a), an insulating sleeve (3 a) is coated outside the sensor, the insulating sleeve (3 a) is embedded into the installation gap and fixedly connected with the upper surface of the elastic support (1 a), a wear-resistant layer (4 a) is connected to the upper surface of the insulating sleeve (3 a), and the upper surface of the wear-resistant layer (4 a) is slightly higher than the upper surface of the elastic support (1 a), so that the upper surface of the wear-resistant layer (4 a) is tightly attached to the inner wall of the pipeline;

in four corners of the parallelogram elastic support (1 a), a first fillet groove (5 a) is formed at an acute angle formed between the lower bottom and the first side edge, a third fillet groove (7 a) is formed on the outer surface of the second side edge of the parallelogram elastic support (1 a), and the third fillet groove (7 a) is close to an obtuse angle formed between the upper bottom and the second side edge of the parallelogram elastic support (1 a);

the chain (6) is formed by connecting at least two metal rings (351), a first mounting head (36) is arranged on a first rear flange (8) connected with the first cylinder body (1), a second mounting head (37) is arranged on a second front flange (11) connected with the second cylinder body (2), the first mounting head (36) and the second mounting head (37) respectively penetrate through a first rear pressing plate (1001) on the first cylinder body (1) and a second front pressing plate (18) on the second cylinder body (2), and connected with both ends of the chain (6), a metal ring (351) at one end of the chain (6) is embedded into the first mounting head (36), and is connected to the first mounting head (36) by means of a first pin, the metal ring (351) at the other end of the chain (6) being embedded in the second mounting head (37) and connected to the second mounting head (37) by means of a second pin (39).

2. The mechanism of claim 1, wherein: the chain (6) is covered with a flexible sleeve.

3. The mechanism of claim 2, wherein: the flexible sleeve is a cylindrical polyurethane sleeve.

4. The mechanism of any one of claims 1 to 3, wherein: the number of the metal rings (351) is 3-6.

5. The mechanism of claim 2 or 3, wherein: the two ends of the flexible sleeve are respectively embedded into the first mounting head (36) and the second mounting head (37).

6. The mechanism of claim 1, wherein: the inner surface of the first side edge is also provided with a second fillet groove (6 a), and the second fillet groove (6 a) is close to an obtuse angle formed between the upper bottom and the first side edge.

7. The mechanism of claim 1, wherein: the sensor comprises a Hall sensor and an eddy current sensor.

8. The mechanism of claim 1, wherein: the wear-resistant layer (4 a) is a chromium oxide ceramic sheet.

9. The mechanism of claim 1, wherein: batteries are arranged in the first cylinder (1) and the second cylinder (2).