CN213120410U

CN213120410U - Pipeline wall thickness monitoring device

Info

Publication number: CN213120410U
Application number: CN202022392369.5U
Authority: CN
Inventors: 何莎; 伍剑波; 骆吉庆; 张志东; 张兰; 张目超; 王仕强; 喻建胜; 陈文斌; 徐伟津; 徐贵凯
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 pipeline wall thickness monitoring devices belongs to oil gas pipeline wall thickness monitoring technology field, connect and mounting including first casing, second casing, piezoelectric sensor, profile modeling. The first shell comprises a first cavity, and the second shell comprises a second cavity and a clamping groove. The first shell is connected with the second shell, and the first cavity is connected with the second cavity to form a third cavity capable of containing the piezoelectric sensor. The piezoelectric sensor is arranged in the third cavity and is in contact with the pipeline through an opening of the second cavity, wherein the opening is located at one end, close to the pipeline, of the second shell. One end of the profiling joint is in a shape matched with the outer surface of the pipeline, and the other end of the profiling joint is connected with the one end of the second shell. One end of the fixing piece is connected with the pipeline, and the other end of the fixing piece is connected with the clamping groove. 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

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 pipeline wall thickness monitoring.

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, and mainly uses a thickness gauge to regularly measure the fixed-point thickness of the pipelineAlthough the method can reduce the occurrence of accidents to a certain extent, the sudden and accidental characteristics of pipeline thinning failure cannot be fundamentally overcome due to discontinuous detection period, and personnel are required to adopt an ultrasonic probe and a coupling agent to carry out close-range contact measurement on the pipeline, so that the space of some pipelines is limited, the working conditions are poor, the danger 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 pipe wall thickness monitoring, there are several problems: the pipe fitting is not easy to wind and difficult to install; the pipe transmission medium is usually high pressure, high temperature or poisonous gas, liquid and the like, and explosion prevention and 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 pipe (especially, a pipe (e.g., an oil gas pipe) where a corrosion condition occurs or is likely to occur).

In order to achieve the above object, the utility model provides a pipeline wall thickness monitoring devices, including first casing, second casing, piezoelectric sensor, profile modeling joint and mounting. The first shell comprises a first cavity, and the second shell comprises a second cavity and a clamping groove. 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 piezoelectric sensor is arranged in the third cavity and is in contact with the pipeline through an opening of the second cavity, wherein the opening is located at one end, close to the pipeline, of the second shell. One end of the profiling joint is in a shape matched with the outer surface of the pipeline, and the other end of the profiling joint is connected with the one end of the second shell. One end of the fixing piece is connected with the pipeline, and the other end of the fixing piece is connected with the clamping groove.

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 primarily fixed by a magnet and then fixed on a pipeline by a fixing piece, 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 pipe wall thickness monitoring device according to the present invention;

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

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

fig. 4 shows a usage state diagram of an exemplary embodiment of the pipeline 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 profiling joint, 7-a clamping groove, 8-a fixing piece, 9-a 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 piece and 17-a second annular bulge.

Detailed Description

Hereinafter, the pipe wall thickness monitoring apparatus 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 exemplary embodiment, the pipe wall thickness monitoring device includes a first housing, a second housing, a piezoelectric sensor, and a contoured joint.

The first housing has a first cavity having a first opening at one end of the first housing near the 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 pipe.

The second shell is provided with a second cavity and a clamping groove. The second cavity has a third opening at one end of the second housing close to the 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 pipe (i.e. the connecting end of the second housing and the first housing). The clamping grooves may include a first clamping groove and a second clamping groove 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 clamping groove and the second clamping groove 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.

One end of the profiling joint is in a shape matched with the outer surface of the pipeline, and the other end of the profiling joint is connected with the one end of the second shell. The draw-in groove includes first draw-in groove and second draw-in groove, the mounting includes first mounting and second mounting, first draw-in groove and second draw-in groove set up the both sides at the second casing respectively, the one end and the pipe connection of first mounting and the other end are connected with first draw-in groove, the one end and the pipe connection of second mounting and the other end are connected with the second draw-in groove.

Further, a magnet may be disposed at the end of the second housing (i.e., the end near the pipe) to attach the second housing to the pipe. The magnet may be one, two or several pieces. The one end of magnet has the profile modeling with pipeline surface assorted, the other end and the second casing of magnet the one end is connected, magnet can adsorb the second casing on the pipeline. 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 pipe by the magnets. Can use magnet preliminary fixed earlier the device carries out the installation of mounting again and fixes, 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 pipe.

The piezoelectric sensor is mounted within the third cavity and is in contact with the conduit through the third opening, thereby enabling the wall thickness of the conduit to be determined.

Further, the pipeline wall thickness monitoring device can further comprise a sealing element, the sealing element can be used for simultaneously connecting the first shell and the second shell, the sealing element is arranged at the joint of the first shell and the second shell, one end of the sealing element is connected with the second shell, the other end of the sealing element is connected with the first shell, and the sealing element can be used for isolating the communication between the third cavity and the outside through a gap at the joint of the first shell and the second shell. For example, the first casing and the second casing are simultaneously connected by at least two screws respectively fixed on the first casing and the second casing, so that the connection between the first casing and the second casing is firmer. For another example, the other end of the sealing element is connected with the first shell through an insertion sheet, one end of the insertion sheet is connected with the other end of the sealing element, and the other end of the insertion sheet is fixed on the inner side of the first shell through a screw. 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.

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 first annular protrusion also has a shape that matches the outer surface of the pipe and contacts the outer surface of the pipe by matching the shape of the outer surface of the pipe. 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 proximate the conduit. 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 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 pipe wall thickness monitoring device includes a first housing, a second housing, a piezoelectric sensor, a profile joint, a jackscrew, and a preload member, the first housing further including a preload bore. That is, in addition to the structure of embodiment 1 described above, the 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 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 pipe wall thickness monitoring device includes a first housing 1, a second housing 2, a piezoelectric sensor 3, a magnet 5, a profile fitting 6, a pre-tightening hole 10, a jackscrew 12, a pre-tightening nut 13, a protective press plate 14 and a sealing member 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 slot 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 mounted in the third cavity 4 and is in contact with the conduit 9 through the second cavity.

The card slot 7 includes a first card slot and a second card slot 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 is in close contact with the outer surface of the pipe 9.

The second annular bulge 17 is located on the inner wall of the second cavity at the end close to the pipeline 9, 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.

One end (lower end in fig. 3) of the profile fitting 6 has a shape matching the outer surface of the pipe 9 and the other end (upper end in fig. 3) is connected to the one end of the second housing.

The first shell 1 is provided with a wire outlet hole 11, and the connecting wire of the piezoelectric sensor 3 is connected to an external thickness gauge through the wire outlet hole 11.

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

The pre-tightening hole 10 is communicated with the first cavity, and a fifth opening is formed at one end, far away from the 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 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 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 present exemplary embodiment, the first housing 1, the second housing 2, and the sealing element 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 pipeline by a fixing piece, 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 pipeline wall thickness monitoring device is characterized by comprising a first shell, a second shell, a piezoelectric sensor, a profiling joint and a fixing piece, wherein,

the first shell comprises a first cavity, and the second shell comprises a second cavity and a clamping groove;

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 piezoelectric sensor is arranged in the third cavity and is in contact with the pipeline through an opening of the second cavity, which is positioned at one end of the second shell close to the pipeline;

one end of the profiling joint is in a shape matched with the outer surface of the pipeline, and the other end of the profiling joint is connected with one end of the second shell;

one end of the fixing piece is connected with the pipeline, and the other end of the fixing piece is connected with the clamping groove.

2. The pipeline wall thickness monitoring device according to claim 1, wherein the pipeline wall thickness monitoring device further comprises a jackscrew and a pre-tightening nut, the first housing 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 and the pre-tightening nut to be pressed on the piezoelectric sensor, and the other end of the jackscrew can be exposed out of the first housing.

3. The pipe wall thickness monitoring device according to 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 bore diameter 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 pipe wall thickness monitoring device according to claim 2, further comprising a protective sheeting disposed between the jackscrew and the piezoelectric sensor, the protective sheeting being capable of preventing the jackscrew from damaging the piezoelectric sensor.

5. The pipe wall thickness monitoring device according to claim 1, wherein the first housing further comprises a wire outlet hole, the wire outlet hole communicates the first cavity with the outside, and the connection wire of the piezoelectric sensor can be connected to an external thickness gauge by passing through the wire outlet hole.

6. The device for monitoring the wall thickness of the pipeline according to claim 1, wherein the clamping groove comprises a first clamping groove and a second clamping groove, the fixing member comprises a first fixing member and a second fixing member, the first clamping groove and the second clamping groove are respectively arranged on two sides of the second shell, one end of the first fixing member is connected with the pipeline, the other end of the first fixing member is connected with the first clamping groove, one end of the second fixing member is connected with the pipeline, and the other end of the second fixing member is connected with the second clamping groove.

7. The pipe wall thickness monitoring device according to claim 1, wherein the second housing further includes 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 further has a shape matching with the outer surface of the pipe and contacts the outer surface of the pipe through the shape matching with the outer surface of the pipe, the second annular protrusion is located on the inner wall of the second cavity near the opening, and a fourth cavity is formed between the first annular protrusion and the second annular protrusion as a coupling cavity.

8. The pipe wall thickness monitoring device of claim 1, further comprising a magnet having a contour matching an outer surface of the pipe at one end thereof and connected at the other end thereof to the one end of the second housing, the magnet being capable of attracting the second housing to the pipe.

9. The pipeline wall thickness monitoring device according to claim 1, further comprising a sealing member, wherein the sealing member is disposed at a junction of the first housing and the second housing, one end of the sealing member is connected to the second housing, the other end of the sealing member is connected to the first housing, and the sealing member can block the third cavity from communicating with the outside through a gap at the junction of the first housing and the second housing.

10. The pipeline wall thickness monitoring device of claim 9, wherein the other end of the sealing element is connected with the first shell by arranging an insertion sheet, one end of the insertion sheet is connected with the other end of the sealing element, and the other end of the insertion sheet is fixed on the inner side of the first shell by a screw.