CN213120481U

CN213120481U - Square pipeline wall thickness monitoring device

Info

Publication number: CN213120481U
Application number: CN202022391247.4U
Authority: CN
Inventors: 何莎; 骆吉庆; 伍剑波; 张志东; 刘成勇; 张兰; 王仕强; 喻建胜; 陈文斌; 徐伟津; 李超
Original assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Current assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-05-04
Anticipated expiration: 2030-10-23

Abstract

The utility model provides a square pipeline wall thickness monitoring devices belongs to oil gas pipeline wall thickness monitoring technical field, including first casing, second casing, closing cap, piezoelectric sensor and conjunction. The first shell comprises a first cavity, and the second shell comprises a second cavity and a bayonet. The first shell is connected with the second shell, and the first cavity is connected with the second cavity to form a third cavity. The cover is connected with the first shell and the second shell simultaneously. The combined part comprises a detachable fastener, a big head end and a small head end which are connected with each other, the big head end is fixed on the square pipeline, and the small head end penetrates through the bayonet to be connected with the fastener. The piezoelectric sensor is arranged in the third cavity and is in contact with the square pipeline through an opening of the second cavity, wherein the opening is located at one end, close to the square pipeline, of the second shell. The beneficial effects of the utility model can include: the method is suitable for inflammable and explosive places; the installation is firm, and the monitoring accuracy is high; easy to install, disassemble and overhaul.

Description

Square pipeline wall thickness monitoring device

Technical Field

The utility model relates to a pipeline wall thickness monitoring technology field, particularly, relate to a device for monitoring of square pipeline wall thickness.

Background

Along with the service life extension and medium corrosion, ageing and other reasons, the safety problem of oil and gas pipelines is increasingly outstanding. Especially for transporting high-sulfur, high-temperature CO₂And the natural gas pipeline with large sand content has more concern about the internal corrosion condition. The ultrasonic detection method is the most widely applied method for measuring the wall thickness of the pipeline at present,the method can reduce the occurrence of accidents to a certain extent, but the detection period is discontinuous, so that the sudden and accidental characteristics of pipeline thinning failure cannot be fundamentally overcome, personnel are required to adopt an ultrasonic probe and a coupling agent to carry out close-range contact measurement on the pipeline, the space of certain pipelines is limited, the working condition is poor, the risk is high, and great inconvenience is brought to the thickness measurement work. In order to overcome the defects and shortcomings of the existing ultrasonic point inspection mode, the development of a pipeline real-time online thickness measuring system and a monitoring system which are not in manual contact is widely concerned at home and abroad.

For monitoring the wall thickness of a square pipe, the following problems are caused: the square pipe fitting is not easy to wind, and the installation is difficult; the transmission medium of the square pipe fitting is usually high pressure, high temperature or poisonous gas, liquid and the like, and the explosion prevention and the safety are very important; the key pipe fittings needing to be monitored are often positioned in narrow space, underground or higher positions, the manual installation, disassembly and maintenance are inconvenient and certain danger exists, so that the pipe fittings are expected to be permanently installed and used at one time; the surface of the pipe fitting is rough and uneven, and the pipe fitting is difficult to couple; if the installation is not firm, the signal acquisition is influenced by small movement or vibration.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve at least one of the above-mentioned not enough of prior art existence. For example, one of the objectives of the present invention is to provide an online real-time wall thickness monitoring device that can be applied to a square pipe (especially, a square pipe (for example, a square oil and gas pipe) where corrosion occurs or may occur).

In order to achieve the above object, the present invention provides a wall thickness monitoring device for a square pipe, which comprises a first casing, a second casing, a sealing cover, a piezoelectric sensor and a connector. The first shell comprises a first cavity, and the second shell comprises a second cavity and a bayonet. The first shell is connected with the second shell, and the first cavity is connected with the second cavity to form a third cavity. The cover is connected with the first shell and the second shell simultaneously. The combined part comprises a detachable fastener, a big head end and a small head end which are connected with each other, the big head end is fixed on the square pipeline, and the small head end penetrates through the bayonet to be connected with the fastener. The piezoelectric sensor is arranged in the third cavity and is in contact with the square pipeline through an opening of the second cavity, wherein the opening is located at one end, close to the square pipeline, of the second shell.

Compared with the prior art, the beneficial effects of the utility model can include: the method can be suitable for inflammable and explosive places; the probe device can be preliminarily fixed by a magnet and then fixed on a square pipeline by bolts, so that double fixation is realized, firm installation of the probe is ensured, and the monitoring accuracy is improved; the installation and the disassembly are easy, and the maintenance is facilitated; the method is beneficial to the application of the pipeline wall thickness monitoring technology and has a great engineering application value.

Drawings

Fig. 1 shows an exploded perspective view of an exemplary embodiment of a square pipe wall thickness monitoring device according to the present invention;

fig. 2 shows a cross-sectional view of an exemplary embodiment of a square pipe wall thickness monitoring device of the present invention;

fig. 3 shows a bottom view of the second housing in an exemplary embodiment of the square pipe wall thickness monitoring apparatus of the present invention;

fig. 4 shows a usage state diagram of an exemplary embodiment of the square pipe wall thickness monitoring device of the present invention.

The labels in the figure are:

1-a first shell, 2-a second shell, 3-a piezoelectric sensor, 4-a third cavity, 5-a magnet, 6-a combining piece, 7-a bayonet, 8-a fastener, 9-a square pipeline, 10-a pre-tightening hole, 11-a wire outlet hole, 12-a jackscrew, 13-a pre-tightening nut, 14-a protective pressing sheet, 15-a first annular bulge, 16-a sealing cover and 17-a second annular bulge.

Detailed Description

Hereinafter, the square pipe wall thickness monitoring device of the present invention will be described in detail with reference to exemplary embodiments.

Herein, the terms "first," "second," "third," "fourth," "fifth," and the like are used for convenience of description and for convenience of distinction, and are not to be construed as indicating or implying relative importance or order of parts.

Example 1

In the present exemplary embodiment, the square pipe wall thickness monitoring apparatus includes a first housing, a second housing, a cover, a piezoelectric sensor, and a joint.

The first housing has a first cavity, and the first cavity has a first opening at one end of the first housing close to the square pipe (i.e., the connection end of the first housing and the second housing), and may have a second opening at the other end away from the square pipe.

The second shell is provided with a second cavity and a bayonet. The second cavity has a third opening at one end of the second housing close to the square pipe (i.e. the second cavity is located at the opening at one end of the second housing close to the pipe), and a fourth opening at the other end of the second housing far from the square pipe (i.e. the connecting end of the second housing and the first housing). The bayonets may include a first bayonet and a second bayonet that are symmetrical with respect to the second cavity, for example, the second cavity penetrates through the center of the second housing from top to bottom, and the first bayonet and the second bayonet are located at the left end and the right end of the second housing.

The first shell is connected with the second shell, and the first cavity and the second cavity are connected to form a third cavity capable of containing the piezoelectric sensor. For example, the first opening of the first housing is aligned with the fourth opening of the second housing, so that the first cavity and the second cavity are communicated to form a third cavity, and then the first housing and the second housing are connected. The connection between the first housing and the second housing may be, for example, a screw connection, a snap connection, or the like.

The coupling includes a detachable fastener, a large head end and a small head end connected to each other. The large end is fixed (e.g., welded) on the square pipe, and the small end passes through the bayonet to be connected with the detachable fastener, so as to fix the second shell on the square pipe, and further fix the wall thickness monitoring device of the square pipe of the exemplary embodiment on the square pipe. The number of the coupling members (e.g., constituted by the bolt and the lock nut) needs to correspond to the number of the bayonets. For example, the bayonet comprises a first bayonet and a second bayonet, the combining part comprises a first bolt, a first locking nut, a second bolt and a second locking nut, one end of the first bolt is fixed on the square pipeline, the other end of the first bolt penetrates through the first bayonet to be connected with the first locking nut, one end of the second bolt is fixed on the square pipeline, and the other end of the second bolt penetrates through the second bayonet to be connected with the second locking nut.

The bayonet can be a U-shaped hole or a through hole, and can also be in other shapes which can use the combining piece to fix the second shell on the square pipeline.

Further, a magnet may be disposed at the end of the second housing (i.e., the end close to the square pipe) to attach the second housing to the square pipe. The magnet may be one, two or several pieces. For example, the first magnet and the second magnet are respectively fixed at two positions on the surface of the one end of the second housing, which are symmetrical about the third opening, so that the device can be attracted to the square pipe by the magnets. Can use magnet preliminary fixed earlier place, it is fixed to carry out the installation of bolt again, has both guaranteed the adjustable of mounted position, has also guaranteed the convenience of installation. However, the solution is not limited to this, and it is also possible to use only magnet fixing if the magnet can ensure that the device is fixed in its position without affecting its measurement of the pipe wall thickness. Further, it is also possible to configure the magnet as a single body with the second housing or to provide a part of the second housing itself with magnetism that can be attracted to the square pipe.

The piezoelectric sensor is mounted in the third cavity and contacts the square tube through the third opening, thereby enabling determination of the wall thickness of the square tube.

The cover can simultaneously connect the first shell and the second shell, for example, by at least two screws respectively fixed on the first shell and the second shell, so that the first shell and the second shell are connected more firmly. And the sealing cover and/or the first shell can be further provided with a wire outlet hole communicated with the third cavity, so that the connecting wire of the piezoelectric sensor can be connected to an external thickness gauge. That is, the outlet hole can be selectively opened on the first housing, the cover, or both the first housing and the cover according to the outlet direction of the piezoelectric sensor.

Further, the second housing may further have a first annular projection and a second annular projection. The first annular protrusion is located at the end of the second housing and the annular shape of the first annular protrusion can surround the opening (or the third opening) of the second cavity. For example, the second shell projects a circle at the periphery of the third opening to form a first annular bulge. The second annular protuberance is located on an inner wall of the second cavity, for example, on an inner wall of an end of the second cavity near the square tube. The second annular bump is beneficial for better fixing the piezoelectric sensor, and a fourth cavity serving as a coupling cavity can be formed between the second annular bump and the first annular bump. A coupling agent may be disposed within the fourth cavity. The first annular bulge can be tightly attached to the square pipeline to realize sealing, prevent the couplant from leaking, further ensure that the couplant in the fourth cavity is filled with the sensing head of the piezoelectric sensor all the time, and facilitate the measurement of the wall thickness of the pipeline by the piezoelectric sensor to be closer to the true value.

Example 2

In the exemplary embodiment, the square pipe wall thickness monitoring device comprises a first shell, a second shell, a cover, a piezoelectric sensor, a combining piece, a jackscrew and a pre-tightening piece, wherein the first shell further comprises a pre-tightening hole. That is, on the basis of the structure of embodiment 1 described above, the square pipe wall thickness monitoring apparatus of the present exemplary embodiment further includes a jackscrew and a preload piece, and the first housing further includes a preload hole.

The pre-tightening hole is communicated with the first cavity and is provided with a fifth opening at the other end of the first shell.

The pre-tightening hole may be configured as a stepped hole, an end of which away from the first housing surface (i.e., an end close to the first cavity) is a large end, and an end of which close to the first housing surface (i.e., an end away from the first cavity) is a small end, and a hole diameter of the large end is larger than that of the small end.

The large end of the preload hole may be configured as a polygonal hole (e.g., a hexagonal hole), the preload member (e.g., a polygonal nut matched with the polygonal hole) is installed at the large end of the preload hole, one end of the jackscrew passes through the preload hole, the preload member is pressed against the piezoelectric sensor, and the other end is exposed out of the first housing so as to adjust the degree of tightness of pressing of the jackscrew against the piezoelectric sensor.

The cooperation of pretension hole, jackscrew and with pretension piece can be better fixed piezoelectric sensor, be favorable to piezoelectric sensor and square pipeline to realize better contact and coupling.

Further, a protective sheet (e.g., made of nylon material) may be disposed between the jackscrew and the piezoelectric sensor to prevent the piezoelectric sensor from being damaged by too much pressure applied to the piezoelectric sensor by the jackscrew.

Example 3

As shown in fig. 1, 2, 3 and 4, in the present exemplary embodiment, the square pipe wall thickness monitoring device includes a first housing 1, a second housing 2, a piezoelectric sensor 3, a magnet 5, a binder 6, a pre-tightening hole 10, a jackscrew 12, a pre-tightening nut 13, a protective pressing sheet 14 and a cover 16.

The first housing 1 has a first cavity and a pre-tightening hole 10 which are communicated with each other.

The second housing 2 has a second cavity, a bayonet 7, a first annular projection 15 and a second annular projection 17.

The first shell 1 is connected with the second shell 2, so that the first cavity is connected with the second cavity to form a third cavity 4. The piezoelectric sensor 3 is installed in the third cavity 4 and is in contact with the square pipeline 9 through the second cavity.

The bayonets 7 include a first bayonet and a second bayonet located on both sides (left and right sides as shown in fig. 3) of the second housing.

The first annular projection 15 is disposed at the one end (e.g., the lower end) of the second housing 2 and closely conforms to the outer surface of the square pipe 9.

The second annular bulge 17 is located on the inner wall of one end, close to the square pipeline 9, of the second cavity, and the piezoelectric sensor 3 can be better fixed after the second annular bulge is arranged, and sealing of the third cavity 4 is facilitated.

A fourth cavity is formed between the first annular bulge 15 and the second annular bulge 17. The utility model discloses when using (as shown in fig. 4), need fill the couplant in the fourth cavity for the couplant can be filled full piezoelectric sensor 3's sensing head all the time.

The connector 6 (in this embodiment, a bolt) is welded to the square pipe 9 through one end (e.g., the lower end) thereof, and the other end (e.g., the upper end) thereof passes through the bayonet 7 and the fastener 8 (in this embodiment, a lock nut). In use, the second housing can be fixed to the square pipe 9 by the joint member 6 by tightening the fastener 8.

The cover 16 has an outlet hole 11, and the wiring of the piezoelectric sensor 3 is connected to an external thickness gauge through the outlet hole 11.

The magnet 5 is installed at one end (e.g., the lower end) of the second housing 2, and can attach the second housing 2 to the square pipe 9.

The pre-tightening hole 10 is communicated with the first cavity, and a fifth opening is formed in one end, far away from the square pipeline, of the first shell 1. The pre-tightening hole 10 is configured as a stepped hole, and the aperture of the large end connected with the first cavity is larger than that of the small end where the fifth opening is located.

The pretension nut 13 is mounted in the large end of the pretension hole 10.

The jackscrew 12 penetrates through the pre-tightening hole 10 and the pre-tightening nut 13 from the fifth opening to jack the protective pressing sheet 14, and transmits pressure to the piezoelectric sensor 3 through the protective pressing sheet 14, so that the piezoelectric sensor 3 can be attached to the square pipeline 9 more tightly under the condition that the piezoelectric sensor 3 is not damaged. When the piezoelectric sensor is used, the piezoelectric sensor 3 and the square pipeline 9 can be in close contact only by screwing the jackscrew 12, so that good coupling is facilitated, and the monitoring accuracy is improved.

In the exemplary embodiment, the first housing 1, the second housing 2, and the cover 16 are made of an explosion-proof ASA material, and are suitable for flammable and explosive places.

To sum up, the utility model discloses have at least one or more in following beneficial effect: the method can be suitable for inflammable and explosive places; the device can be preliminarily fixed by a magnet and then fixed on a square pipeline by bolts, so that double fixation is realized, firm installation of the probe is ensured, and the monitoring accuracy is improved; the installation and the disassembly are easy, and the maintenance is facilitated; the method is beneficial to the application of the pipeline wall thickness monitoring technology and has a great engineering application value.

Although the present invention has been described above in connection with exemplary embodiments and the accompanying drawings, it will be apparent to those of ordinary skill in the art that various modifications may be made to the above-described embodiments without departing from the spirit and scope of the claims.

Claims

1. A wall thickness monitoring device for a square pipeline is characterized by comprising a first shell, a second shell, a sealing cover, a piezoelectric sensor and a combining piece, wherein,

the first shell comprises a first cavity, and the second shell comprises a second cavity and a bayonet;

the first shell is connected with the second shell, and the first cavity is connected with the second cavity to form a third cavity;

the sealing cover is connected with the first shell and the second shell simultaneously;

the connector comprises a detachable fastener, a big head end and a small head end which are connected with each other, the big head end is fixed on the square pipeline, and the small head end penetrates through the bayonet to be connected with the fastener;

the piezoelectric sensor is arranged in the third cavity and is in contact with the square pipeline through an opening of the second cavity, wherein the opening is located at one end, close to the square pipeline, of the second shell.

2. The wall thickness monitoring device for the square pipeline as claimed in claim 1, wherein the wall thickness monitoring device for the square pipeline further comprises a jackscrew and a pre-tightening nut, the first shell further comprises a pre-tightening hole, the pre-tightening hole communicates the first cavity with the outside, the pre-tightening nut is installed in the pre-tightening hole, one end of the jackscrew can penetrate through the pre-tightening hole, the pre-tightening nut is pressed on the piezoelectric sensor, and the other end of the jackscrew can be exposed out of the first shell.

3. The wall thickness monitoring device for the square pipeline as claimed in claim 2, wherein the pre-tightening hole is a stepped hole and has a large end close to the first cavity and a small end far away from the first cavity, the large end has a larger aperture than the small end, and the large end of the pre-tightening hole is a polygonal hole capable of accommodating and clamping the pre-tightening nut.

4. The wall thickness monitoring device for the square pipeline as claimed in claim 2, wherein a protective pressing sheet is arranged between the jackscrew and the piezoelectric sensor, and the protective pressing sheet can prevent the jackscrew from damaging the piezoelectric sensor.

5. The square pipe wall thickness monitoring device according to claim 1, wherein an outlet hole is configured on the sealing cover and/or the first housing, the outlet hole is communicated with the third cavity, and a connection line of the piezoelectric sensor is connected with an external thickness gauge through the outlet hole.

6. The wall thickness monitoring device for square pipes according to claim 1, wherein the bayonet comprises a first bayonet and a second bayonet, the connector comprises a first connector and a second connector, the large head end of the first connector is fixed on the square pipe, the small head end of the first connector passes through the first bayonet to be connected with the fastener of the first connector, the large head end of the second connector is fixed on the square pipe, and the small head end of the second connector passes through the second bayonet to be connected with the fastener of the second connector.

7. The square pipe wall thickness monitoring device according to claim 1, wherein the second housing further comprises a first annular protrusion and a second annular protrusion, the first annular protrusion is located at the one end of the second housing and can surround the opening of the second cavity, the first annular protrusion is further in contact with the outer surface of the square pipe, the second annular protrusion is located on the inner wall of the second cavity close to the opening, and a fourth cavity serving as a coupling cavity is formed between the first annular protrusion and the second annular protrusion.

8. The square pipe wall thickness monitoring device according to claim 1, further comprising a magnet, wherein one end of the magnet is attached to the outer surface of the square pipe, and the other end of the magnet is connected to the one end of the second housing.

9. The square pipe wall thickness monitoring device according to claim 1, wherein the bayonet is a through hole or a U-shaped hole.