CN212274853U

CN212274853U - High-precision pipeline deformation measuring device

Info

Publication number: CN212274853U
Application number: CN201922355858.0U
Authority: CN
Inventors: 杨玉
Original assignee: Dazhou Detec Testing Equipment Co ltd
Current assignee: Dazhou Detec Testing Equipment Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2021-01-01
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses a high accuracy pipeline deformation measuring device, install measuring arm, a plurality of numerical control box and a plurality of mileage wheel on second barrel surface including first barrel, second barrel, a plurality of, the second barrel is connected with first barrel and is located first barrel rear, preceding leather cup is installed in first barrel, the respective front end of second barrel through a preceding flange mounting, and the bolt passes preceding clamp plate, preceding leather cup, preceding flange and first barrel, the respective preceding terminal surface of second barrel in proper order before a plurality of, with preceding clamp plate, preceding leather cup, preceding flange and first barrel, second barrel fixed connection, the mileage wheel further includes mounting panel, wheel seat and the wheel body with rear flange connection, the one end and the mounting panel rotatable coupling of wheel seat, the other end of wheel seat is installed the wheel body. The utility model discloses both can guarantee sufficient turning radius when the device turns, produce the rebound effort or the internal stress of side direction and influence the stability of device motion when can avoiding turning again.

Description

High-precision pipeline deformation measuring device

Technical Field

The utility model relates to a high accuracy pipeline deformation measuring device belongs to pipeline detection technical field.

Background

The pipeline is the important facility of transportation liquid and gas, by the wide application in feedwater, drainage, heat supply, supply gas, long distance transport oil and natural gas, agricultural irrigation, among hydraulic engineering and various industrial installation, the pipeline produces damage deformation of different degree after long-time the use easily, lead to the efficiency of oil gas transportation to reduce, produce in the transportation and reveal and lead to the loss increase, also caused serious potential safety hazard simultaneously, consequently necessary to carry out periodic detection to the pipeline, guarantee the intact and peripheral safety of pipeline, reduce pipeline operation management risk, reduce the emergence of operation production accident.

In the prior art, a magnetic leakage detection method is often adopted to detect the characteristics, the length and the like of the inner wall and the outer wall of a pipeline and the pipeline, when the magnetic leakage detection method utilizes a ferromagnetic steel pipe to be fully magnetized, magnetic lines of force in the pipe wall are blocked by defects on the surface or the position close to the surface of the ferromagnetic steel pipe, the magnetic lines of force at the defects are distorted, and a part of the magnetic lines of force leaks 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 at providing a high accuracy pipeline deformation measuring device, this high accuracy pipeline deformation measuring device both can guarantee sufficient turning radius when the device turns at magnetic leakage detection device, produces the rebound effort or the internal stress of side direction and influence the stability of device motion when can avoiding turning again.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a high-precision pipeline deformation measuring device comprises a first cylinder, a second cylinder, a plurality of measuring arms arranged on the outer surface of the second cylinder, a plurality of numerical control boxes and a plurality of mileage wheels, wherein the second cylinder is connected with the first cylinder and is positioned behind the first cylinder, the first cylinder and the second cylinder are respectively provided with a front leather cup and a rear leather cup, the front leather cups are arranged at the front ends of the first cylinder and the second cylinder through front flanges, the rear leather cups are arranged at the rear ends of the first cylinder and the second cylinder through rear flanges, the mileage wheels are arranged on the rear flanges of the second cylinder, each front leather cup and each rear leather cup are in interference fit with the inner wall of a pipeline in the circumferential direction, and the measuring arms and the mileage wheels are in contact connection with the inner wall of the pipeline;

a plurality of battery sections are arranged in the first barrel and used for supplying power to the numerical control box on the second barrel;

the front leather cup is fixedly connected with the front flange of the first barrel and the front flange of the second barrel through a front pressing plate, the rear leather cup is fixedly connected with the rear flange of the first barrel and the rear barrel through a rear pressing plate, a plurality of front bolts sequentially penetrate through the front pressing plate, the front leather cup and the front flange and the front end face of the first barrel and the front end face of the second barrel, the front pressing plate, the front leather cup and the front flange are fixedly connected with the first barrel and the second barrel, a plurality of rear bolts sequentially penetrate through the rear pressing plate, the rear leather cup and the rear end face of the first barrel and the rear end face of the second barrel, and the rear pressing plate, the rear leather cup and the rear flange are fixedly connected with the first barrel and the second barrel;

the plurality of mileage wheels are installed on the surface of the back leather cup back on to the back pressure plate of the second barrel body at equal intervals along the circumferential direction, the measuring arms are arranged at equal intervals along the circumferential direction of the second barrel body, the numerical control box is installed on the outer surface of the second barrel body at equal intervals along the circumferential direction, and the numerical control box and the measuring arms are 1 in number ratio: 2-8, electrically connecting each numerical control box with 2-8 measuring arms;

the first barrel and the second barrel are connected through a chain, the chain is formed by connecting at least two metal rings, a first mounting head is arranged on a rear flange connected with the first barrel, a second mounting head is arranged on a front flange connected with the second barrel, the first mounting head and the second mounting head respectively penetrate through a rear pressing plate on the first barrel and a 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 measuring arm further comprises a mounting seat, a rotating arm, a magnet and an angle sensor, one end of the mounting seat is fixedly connected with the second cylinder, the rotating arm is rotatably mounted at the other end of the mounting seat, one end of the rotating arm is in contact connection with the inner wall of the pipeline, the other end of the rotating arm is rotatably embedded into the mounting seat, one end of the rotating arm in the mounting seat is connected with the magnet, the magnet rotates along with the rotating arm, the angle sensor is fixedly mounted on the mounting seat, arranged in parallel with the magnet in a face-to-face mode and used for sensing the rotating angle of the magnet, and a spring is connected between one end of the mounting seat, connected with the second cylinder, and the rotating arm;

the mileage wheel further includes mounting panel, wheel seat and the wheel body with back flange joint, the one end and the mounting panel rotatable coupling of wheel seat, install the other end of wheel seat the wheel body, be located on the mounting panel and take turns wheel seat both sides and be provided with a cylinder respectively, these two cylinders respectively with take turns between the seat through an extension spring be connected.

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

1. in the scheme, the front leather cup and the rear leather cup are both polyurethane leather cups.

2. In the scheme, the chain is coated with a flexible sleeve.

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

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 scheme, one end of the rotating arm positioned in the mounting seat is provided with a bin body, and the magnet is connected in the bin body in an adhering mode.

6. In the above scheme, the angle sensor is a hall element.

7. In the above scheme, the wheel seat comprises two side plates arranged in parallel, and the middle parts of the two side plates are connected through a pin.

8. In the scheme, the mounting plate is fixedly provided with the concave seat, and the concave seat is embedded between the two side plates and is rotationally connected with the two side plates through a pin.

9. In the scheme, the surfaces of the two side plates, which are back to back, are provided with the first tension spring hole connected with one end of the tension spring.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

1. the utility model discloses high accuracy pipeline deformation measuring device, it can move in the pipeline that has 15% deflection, and through the detection to the pipeline internal diameter that passes through, effectively discern the deformation position of pipeline, especially sunken position and deflection, provide earlier stage data for the further detection of follow-up equipment to the pipeline, provide the guidance for the detection of follow-up equipment to the pipeline; in addition, a first cylinder and a second cylinder are connected through a chain, the chain is formed by connecting at least two metal rings, a rear flange connected with the first cylinder is provided with a first mounting head, a front flange connected with the second cylinder is provided with a second mounting head, the first mounting head and the second mounting head respectively penetrate through a rear pressing plate on the first cylinder and a front pressing plate on the second cylinder 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, 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, and the two cylinders are connected through the chain, so that the connection of the cylinders is realized, the conduction of driving force between the cylinders is convenient, and the device has larger bending space, so that the device can smoothly pass through a bend and still keep the mutual pulling force when the bend passes through the bend, furthermore, the chain formed by connecting a plurality of metal rings 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.

2. The utility model discloses high accuracy pipeline deformation measuring device, its measuring arm further includes mount pad, rotor arm, magnet and angle inductor, mount pad one end and second barrel fixed connection, rotatable the installing rotor arm on the other end of this mount pad, the one end of rotor arm is connected with the inner wall contact of pipeline, and the rotatable embedding mount pad of the other end, and the rotor arm one end that lies in the mount pad is connected with the magnet, and this magnet rotates along with the rotor arm, angle inductor fixed mounting is on the mount pad, and with the parallel arrangement face to face of magnet, is used for responding to the turned angle of magnet, be connected with a spring between the one end that the mount pad is connected with the second barrel and the rotor arm, through the rotation of magnet on the angle inductor cooperation rotor arm, realized the detection to pipeline sunken, simple structure, precision are high, and the setting of spring between rotor arm and the mount pad, the device has been guaranteed in the pipeline motion process, and the one end of swinging boom keeps inseparable contact with the pipeline inner wall all the time to guaranteed the precision to pipeline internal diameter measurement, prolonged the life of measuring arm simultaneously.

3. The utility model discloses high accuracy pipeline deformation measuring device, its mileage wheel further includes mounting panel, wheel seat and the wheel body with flange joint behind, one end and the mounting panel rotatable coupling of wheel seat, the wheel body is installed to the other end of wheel seat, the mounting panel and lie in wheel seat both sides and be provided with a cylinder respectively, these two cylinders are connected through an extension spring between respectively and the wheel seat, the setting of mileage wheel not only can play good supporting role to the device, simultaneously can record the device in the pipeline mileage of marcing, can cooperate other positioner, provide the motion trail of accurate device in the pipeline, cooperate the measured data of measuring arm, both can obtain the pipeline position that every pipeline internal diameter value corresponds, and the setting of extension spring, then can guarantee the pressure of contact between wheel body and the pipeline inner wall, make the wheel body keep moderate dynamics and pipeline inner wall laminating all the time, not only ensures the accurate measurement of the mileage of the device in the pipe, but also reduces the friction damage caused by the contact of the wheel body and the pipe wall and prolongs the service life of the mileage wheel.

Drawings

FIG. 1 is a sectional view of the high-precision pipeline deformation measuring device of the present invention;

FIG. 2 is a sectional view of the partial structure of the measuring arm of the high-precision pipe deformation measuring device of the present invention;

FIG. 3 is a schematic view of the measuring arm structure of the high-precision pipe deformation measuring device of the present invention;

FIG. 4 is a schematic view of a mileage wheel structure of the high-precision pipeline deformation measuring device of the present invention;

FIG. 5 is a sectional view of the mileage wheel of the high-precision pipeline deformation measuring device of the present invention;

FIG. 6 is a schematic view of a mileage wheel structure of the high-precision pipeline deformation measuring device of the present invention;

FIG. 7 is a schematic structural view of the high-precision pipeline deformation measuring device of the present invention;

FIG. 8 is a partial structural cross-sectional view of the high-precision pipe deformation measuring device of the present invention;

fig. 9 is the utility model discloses high accuracy pipeline deformation measuring device's local structure schematic diagram.

In the above drawings: 1a, a first cylinder; 1b, a second cylinder; 2. a front leather cup; 3. a back leather cup; 4. measuring an arm; 5. a numerical control box; 6. a mileage wheel; 7. a front flange; 8. a rear flange; 9. a front platen; 10. a rear pressing plate; 11. a front bolt; 12. a rear bolt; 14. a mounting seat; 15. a rotating arm; 16. a magnet; 17. an angle sensor; 18. a bin body; 21. a spring; 22. mounting a plate; 23. a wheel seat; 24. a wheel body; 25. a cylinder; 26. a tension spring; 29. a side plate; 30. a concave seat; 311. a first tension spring hole; 35. a chain; 351. a metal ring; 36. a first mounting head; 37. a second mounting head; 38. a first pin; 39. a second pin; 40. A flexible sleeve.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, 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 referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore 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 high-precision pipeline deformation measuring device comprises a first cylinder body 1a, a second cylinder body 1b, a plurality of measuring arms 4 arranged on the outer surface of the second cylinder body 1b, a plurality of numerical control boxes 5 and a plurality of mileage wheels 6, the second cylinder body 1b is connected with the first cylinder body 1a and is positioned behind the first cylinder body 1a, the first cylinder body 1a and the second cylinder body 1b are respectively provided with a front leather cup 2 and a rear leather cup 3, the front leather cup 2 is arranged at the front ends of the first cylinder body 1a and the second cylinder body 1b through a front flange 7, the rear leather cup 3 is arranged at the rear end of each of the first barrel body 1a and the second barrel body 1b through a rear flange 8, the plurality of mileage wheels 6 are arranged on the rear flange 8 of the second barrel body 1b, each of the front leather cup 2 and the rear leather cup 3 is in interference fit with the inner wall of the pipeline in the circumferential direction, and the measuring arm 4 and the mileage wheels 6 are in contact connection with the inner wall of the pipeline;

a plurality of battery sections are arranged in the first barrel 1a and used for supplying power to the numerical control box 5 on the second barrel 1 b;

the front leather cup 2 is fixedly connected with respective front flanges 7 of the first barrel 1a and the second barrel 1b through a front pressing plate 9, the rear leather cup 3 is fixedly connected with respective rear flanges 8 of the first barrel 1a and the second barrel 1b through a rear pressing plate 10, a plurality of front bolts 11 sequentially penetrate through the front pressing plate 9, the front leather cup 2, the front flange 7 and respective front end faces of the first barrel 1a and the second barrel 1b, the front pressing plate 9, the front leather cup 2, the front flange 7 are fixedly connected with the first barrel 1a and the second barrel 1b, a plurality of rear bolts 12 sequentially penetrate through the rear pressing plate 10, the rear leather cup 3, the rear flange 8 and respective rear end faces of the first barrel 1a and the second barrel 1b, and the rear pressing plate 10, the rear leather cup 3, the rear flange 8 are fixedly connected with the first barrel 1a and the second barrel 1 b;

the plurality of mileage wheels 6 are arranged on the surface of the rear leather cup 3 back on to the rear pressing plate 10 of the second cylinder body 1b at equal intervals along the circumferential direction, the measuring arms 4 are arranged at equal intervals along the circumferential direction of the second cylinder body 1b, the numerical control box 5 is arranged on the outer surface of the second cylinder body 1b at equal intervals along the circumferential direction, and the number ratio of the numerical control box 5 to the measuring arms 4 is 1: 2-8, electrically connecting each numerical control box 5 with 2-8 measuring arms 4;

the first cylinder 1a and the second cylinder 1b are connected by a chain 35, the chain 35 is formed by connecting at least two metal rings 351, a rear flange 8 connected with the first cylinder 1a is provided with a first mounting head 36, a front flange 7 connected with the second cylinder 1b is provided with a second mounting head 37, the first mounting head 36 and the second mounting head 37 respectively pass through a rear pressing plate 10 on the first cylinder 1a and a front pressing plate 9 on the second cylinder 1b and are connected with two ends of the chain 35, the metal ring 351 at one end of the chain 35 is embedded in the first mounting head 36 and is connected with the first mounting head 36 by a first pin 38, and the metal ring 351 at the other end of the chain 35 is embedded in the second mounting head 37 and is connected with the second mounting head 37 by a second pin 39;

the measuring arm 4 further comprises a mounting seat 14, a rotating arm 15, a magnet 16 and an angle sensor 17, one end of the mounting seat 14 is fixedly connected with the second cylinder 1b, the rotating arm 15 is rotatably mounted at the other end of the mounting seat 14, one end of the rotating arm 15 is in contact connection with the inner wall of the pipeline, the other end of the rotating arm 15 is rotatably embedded into the mounting seat 14, one end of the rotating arm 15 positioned in the mounting seat 14 is connected with the magnet 16, the magnet 16 rotates along with the rotating arm 15, the angle sensor 17 is fixedly mounted on the mounting seat 14 and is arranged in parallel with the magnet 16 in a face-to-face mode and used for sensing the rotating angle of the magnet 16, and a spring 21 is connected between one end of the mounting seat 14 connected with the second cylinder 1b and the rotating arm 15;

the mileage wheel 6 further includes mounting panel 22, wheel seat 23 and wheel body 24 be connected with back flange 8, the one end and the mounting panel 22 rotatable coupling of wheel seat 23, install the other end of wheel seat 23 wheel body 24, on the mounting panel 22 and lie in wheel seat 23 both sides and be provided with a cylinder 25 respectively, these two cylinders 25 respectively with wheel seat 23 between be connected through an extension spring 26.

The front leather cup 2 and the rear leather cup 3 are both polyurethane leather cups; the chain 35 is covered with a flexible sleeve 40; the flexible sleeve 40 is a cylindrical polyurethane sleeve; the two ends of the flexible sleeve 40 are respectively embedded into the first mounting head 36 and the second mounting head 37; one end of the rotating arm 15 in the mounting seat 14 is provided with a bin body 18, and the magnet 16 is bonded and connected in the bin body 18.

Example 2: a high-precision pipeline deformation measuring device comprises a first cylinder body 1a, a second cylinder body 1b, a plurality of measuring arms 4 arranged on the outer surface of the second cylinder body 1b, a plurality of numerical control boxes 5 and a plurality of mileage wheels 6, the second cylinder body 1b is connected with the first cylinder body 1a and is positioned behind the first cylinder body 1a, the first cylinder body 1a and the second cylinder body 1b are respectively provided with a front leather cup 2 and a rear leather cup 3, the front leather cup 2 is arranged at the front ends of the first cylinder body 1a and the second cylinder body 1b through a front flange 7, the rear leather cup 3 is arranged at the rear end of each of the first barrel body 1a and the second barrel body 1b through a rear flange 8, the plurality of mileage wheels 6 are arranged on the rear flange 8 of the second barrel body 1b, each of the front leather cup 2 and the rear leather cup 3 is in interference fit with the inner wall of the pipeline in the circumferential direction, and the measuring arm 4 and the mileage wheels 6 are in contact connection with the inner wall of the pipeline;

The angle sensor 17 is a hall element; the wheel seat 23 comprises two side plates 29 arranged in parallel, and the middle parts of the two side plates 29 are connected through a pin; a concave seat 30 is fixed on the mounting plate 22, and the concave seat 30 is embedded between the two side plates 29 and is rotatably connected with the two side plates 29 through a pin; the two side plates 29 are respectively provided with a first tension spring hole 311 on opposite surfaces thereof, which is connected to one end of the tension spring 26.

By adopting the high-precision pipeline deformation measuring device, the device can move in a pipeline with 15% of deformation, effectively identifies the deformation part, particularly the sunken part and the deformation of the pipeline through the detection of the inner diameter of the passing pipeline, provides early-stage data for the further detection of the pipeline by subsequent equipment, and provides guidance for the detection of the pipeline by the subsequent equipment;

in addition, the arrangement of the mileage wheel can not only play a good supporting role for the device, but also record the traveling mileage of the device in the pipeline, and can provide an accurate motion track of the device in the pipeline by matching with other positioning devices and measuring data of the measuring arm, so that the pipeline position corresponding to the inner diameter value of each pipeline can be obtained;

in addition, the two cylinders are connected through the chains, so that the connection of the cylinders is realized, the transmission 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;

in addition, the angle sensor is matched with the rotation of the magnet on the rotating arm, the pipeline depression detection is realized, the structure is simple, the precision is high, and the arrangement of the spring between the rotating arm and the mounting seat ensures that one end of the rotating arm is always in close contact with the inner wall of the pipeline in the motion process of the device in the pipeline, so that the precision of the measurement of the inner diameter of the pipeline is ensured, and the service life of the measuring arm is prolonged.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot 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 by the protection scope of the present invention.

Claims

1. The utility model provides a high accuracy pipeline deformation measuring device which characterized in that: comprises a first cylinder body (1 a), a second cylinder body (1 b), a plurality of measuring arms (4) arranged on the outer surface of the second cylinder body (1 b), a plurality of numerical control boxes (5) and a plurality of mileage wheels (6), wherein the second cylinder body (1 b) is connected with the first cylinder body (1 a) and is positioned behind the first cylinder body (1 a), the first cylinder body (1 a) and the second cylinder body (1 b) are respectively provided with a front leather cup (2) and a rear leather cup (3), the front leather cup (2) is arranged at the front ends of the first cylinder body (1 a) and the second cylinder body (1 b) through a front flange (7), the rear leather cup (3) is arranged at the rear ends of the first cylinder body (1 a) and the second cylinder body (1 b) through a rear flange (8), and the mileage wheels (6) are arranged on the rear flange (8) of the second cylinder body (1 b), each front leather cup (2) and each rear leather cup (3) are in interference fit with the inner wall of the pipeline in the circumferential direction, and the measuring arm (4) and the mileage wheel (6) are in contact connection with the inner wall of the pipeline;

a plurality of battery sections are arranged in the first barrel (1 a) and used for supplying power to the numerical control box (5) on the second barrel (1 b);

the front leather cup (2) is fixedly connected with respective front flanges (7) of the first barrel body (1 a) and the second barrel body (1 b) through a front pressing plate (9), the rear leather cup (3) is fixedly connected with respective rear flanges (8) of the first barrel body (1 a) and the second barrel body (1 b) through a rear pressing plate (10), a plurality of front bolts (11) sequentially penetrate through the front pressing plate (9), the front leather cup (2), the front flange (7), the respective front end faces of the first barrel body (1 a) and the second barrel body (1 b), the front pressing plate (9), the front leather cup (2) and the front flange (7) are fixedly connected with the first barrel body (1 a) and the second barrel body (1 b), a plurality of rear bolts (12) sequentially penetrate through the respective rear end faces of the rear pressing plate (10), the rear leather cup (3), the rear flange (8), the first barrel body (1 a) and the second barrel body (1 b), fixedly connecting a rear pressing plate (10), a rear leather cup (3) and a rear flange (8) with the first cylinder body (1 a) and the second cylinder body (1 b);

the plurality of mileage wheels (6) are arranged on the surface of a rear pressure plate (10) of the second cylinder body (1 b) at equal intervals along the circumferential direction, back to the leather cup (3) of the second cylinder body, the measuring arms (4) are arranged at equal intervals along the circumferential direction of the second cylinder body (1 b), the numerical control box (5) is arranged on the outer surface of the second cylinder body (1 b) at equal intervals along the circumferential direction, and the number ratio of the numerical control box (5) to the measuring arms (4) is 1: 2-8, electrically connecting each numerical control box (5) with 2-8 measuring arms (4);

the first cylinder body (1 a) and the second cylinder body (1 b) are connected through a chain (35), the chain (35) is formed by connecting at least two metal rings (351), a first mounting head (36) is arranged on a rear flange (8) connected with the first cylinder body (1 a), a second mounting head (37) is arranged on a front flange (7) connected with the second cylinder body (1 b), the first mounting head (36) and the second mounting head (37) respectively penetrate through a rear pressing plate (10) on the first cylinder body (1 a) and a front pressing plate (9) on the second cylinder body (1 b) and are connected with two ends of the chain (35), the metal ring (351) at one end of the chain (35) is embedded into the first mounting head (36) and is connected with the first mounting head (36) through a first pin (38), the metal ring (351) at the other end of the chain (35) is embedded into the second mounting head (37), and is connected with the second mounting head (37) through a second pin (39);

the measuring arm (4) further comprises a mounting seat (14), a rotating arm (15), a magnet (16) and an angle sensor (17), one end of the mounting seat (14) is fixedly connected with the second cylinder body (1 b), the other end of the mounting seat (14) is rotatably provided with a rotating arm (15), one end of the rotating arm (15) is in contact connection with the inner wall of the pipeline, the other end of the rotating arm is rotatably embedded into the mounting seat (14), one end of the rotating arm (15) positioned in the mounting seat (14) is connected with the magnet (16), the magnet (16) rotates along with the rotating arm (15), the angle sensor (17) is fixedly arranged on the mounting seat (14) and is arranged in parallel with the magnet (16) in a face-to-face manner, the rotating angle of the magnet (16) is sensed, and a spring (21) is connected between one end of the mounting seat (14) connected with the second cylinder (1 b) and the rotating arm (15);

mileage wheel (6) further include mounting panel (22), wheel seat (23) and wheel body (24) be connected with back flange (8), the one end and mounting panel (22) rotatable coupling of wheel seat (23), install the other end of wheel seat (23) wheel body (24), mounting panel (22) are gone up and are located wheel seat (23) both sides and are provided with a cylinder (25) respectively, and these two cylinders (25) are connected through an extension spring (26) between wheel seat (23) separately.

2. The high-precision pipe deformation measuring device according to claim 1, wherein: the front leather cup (2) and the rear leather cup (3) are both polyurethane leather cups.

3. The high-precision pipe deformation measuring device according to claim 1, wherein: the chain (35) is wrapped with a flexible sleeve (40).

4. A high precision pipe deformation measuring device according to claim 3, wherein: the flexible sleeve (40) is a cylindrical polyurethane sleeve.

5. A high precision pipe deformation measuring device according to claim 3 or 4, characterized in that: the two ends of the flexible sleeve (40) are respectively embedded into the first mounting head (36) and the second mounting head (37).

6. The high-precision pipe deformation measuring device according to claim 1, wherein: one end of a rotating arm (15) positioned in the mounting seat (14) is provided with a bin body (18), and the magnet (16) is bonded and connected in the bin body (18).

7. The high-precision pipe deformation measuring device according to claim 1, wherein: the angle sensor (17) is a Hall element.

8. The high-precision pipe deformation measuring device according to claim 1, wherein: the wheel seat (23) comprises two side plates (29) which are arranged in parallel, and the middle parts of the two side plates (29) are connected through a pin.

9. The high precision pipe deformation measuring device of claim 8, wherein: a concave seat (30) is fixed on the mounting plate (22), and the concave seat (30) is embedded between the two side plates (29) and is rotatably connected with the two side plates (29) through a pin.

10. The high precision pipe deformation measuring device of claim 9, wherein: the surfaces of the two side plates (29) which are opposite to each other are respectively provided with a first tension spring hole (311) connected with one end of the tension spring (26).