CN212622118U

CN212622118U - Corrosion rate probe

Info

Publication number: CN212622118U
Application number: CN202021239425.5U
Authority: CN
Inventors: 张海雷; 欧莉; 孙海明; 王鲁峰; 王丽芬; 刘立群; 翟磊; 丁泽康; 张瑞杰; 王朋; 李晓; 张京贤; 姜庆雷; 张培洲
Original assignee: China Petrochemical Corp; Sinopec Oilfield Service Corp; Sinopec Petroleum Engineering Corp
Current assignee: China Petrochemical Corp; Sinopec Oilfield Service Corp; Sinopec Petroleum Engineering Corp
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-02-26
Anticipated expiration: 2030-06-30

Abstract

The utility model provides a corrosion rate probe for the outer corrosion rate of monitoring pipeline, it includes: a cylindrical shell, a cylindrical fixed seat, a test block, three leads and an encapsulating part; the upper surface and the lower surface of the fixed seat are parallel, and the upper surface, the lower surface and the side wall surface are respectively provided with a first mounting groove, a second mounting groove and a third mounting groove; the test piece is provided with a working part, a reference part and a connecting part which are respectively and correspondingly embedded in the first mounting groove, the second mounting groove and the third mounting groove; installing the fixed seat embedded with the test piece at the lower part in the shell, and enabling the lower surface of the fixed seat to face outwards; one end of each of the three wires is respectively connected with the working part, the reference part and the connecting part, and the other end of each of the three wires penetrates out of the shell upwards along the inside of the shell; the encapsulation part is encapsulated in the shell and is positioned above the fixed seat. Therefore, the contact area between the working part and the ground soil cannot be influenced by the potting material of the potting part, and the temperature difference between the working part and the reference part cannot be easily generated by the fixing seat.

Description

Corrosion rate probe

Technical Field

The utility model belongs to the anticorrosive check out test set field of pipeline especially relates to a corrosion rate probe for monitoring outer corrosion rate of pipeline.

Background

Corrosion is an important factor affecting the reliability and service life of pipeline transportation systems, and corrosion damage often causes huge economic loss and serious social consequences. In order to reduce the external corrosion risk of buried long-distance pipelines, the cathodic protection technology is widely applied as an effective technical means for controlling the external corrosion of the pipelines. Before the cathodic protection technology is applied, the comprehensive assessment of the overall external corrosion condition of the pipeline is an important technical link, and when the comprehensive assessment of the overall external corrosion condition of the pipeline is performed, a corrosion rate probe is required to collect the external corrosion rate of the pipeline during operation.

The existing corrosion rate probe is provided with a test piece, the test piece is provided with a working part and a reference part, when the corrosion rate probe is manufactured, the test piece is encapsulated in the probe, the bottom surface of the working part of the test piece faces outwards and contacts with ground soil, and the reference part of the test piece is completely sealed in the probe. However, when the test piece is filled and sealed at present, the sealing at the bottom of the probe cannot ensure that the test piece is completely attached to the surface of the working part of the test piece, so that the filling and sealing material is easy to flow onto the bottom surface of the working part, the contact area between the working part and ground soil is reduced, and the accuracy of measuring the corrosion rate of the pipeline is reduced; in addition, the temperature has a great influence on the measurement of the resistance, and the potting material and the potting structure usually cause a certain difference in temperature between the working part and the reference part, so that a great error exists in the measurement result of the corrosion rate of the pipeline; in addition, the bottom of the probe needs to be sealed before the probe is filled and sealed, and the seal needs to be removed after the probe is filled and sealed, so that the cost of producing and manufacturing the corrosion rate probe is increased, and the production efficiency is reduced.

Therefore, how to design a corrosion rate probe that is not easy to cause the potting material to affect the contact area between the working portion of the test piece and the ground soil, and not easy to generate a temperature difference between the working portion and the reference portion of the test piece, and also capable of simplifying the manufacturing process of the corrosion rate probe to reduce the manufacturing cost has become one of the technical problems to be solved in the art.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the technical scheme is how to make the potting material of the corrosion rate probe not affect the contact area between the working part of the test piece and the ground soil, and make the temperature difference between the working part and the reference part of the test piece not easy to generate, and can simplify the manufacturing process of the corrosion rate probe and reduce the manufacturing cost.

In order to solve the above technical problem, the present technical solution provides a corrosion rate probe for monitoring the corrosion rate outside a pipeline, the corrosion rate probe comprising: a cylindrical shell, a cylindrical fixed seat, a test block, three leads and an encapsulating part; the upper surface and the lower surface of the fixed seat are parallel, the lower surface is provided with a first mounting groove, the upper surface is provided with a second mounting groove, and the side wall surface of the fixed seat is provided with a third mounting groove communicated with the first mounting groove and the second mounting groove; the test piece is provided with a working part, a reference part and a connecting part connected between the working part and the reference part, the working part is correspondingly embedded in the first mounting groove, the reference part is correspondingly embedded in the second mounting groove, and the connecting part is correspondingly embedded in the third mounting groove; installing the fixed seat embedded with the test piece at the lower part in the shell, and enabling the lower surface of the fixed seat to face outwards; one ends of the three wires are respectively connected with the working part, the reference part and the connecting part, and the other ends of the three wires penetrate out of the shell upwards along the inside of the shell; the encapsulation part is encapsulated in the shell and is positioned above the fixed seat. Therefore, most of the lower port of the shell can be sealed through the installation of the fixed seat, and the pouring of the filling and sealing part can be carried out only by sealing the bottom end of the third mounting groove, so that the operation difficulty of sealing the lower port of the shell is simplified, the manufacturing cost is reduced, and the connecting part is embedded in the third mounting groove, so that the poured epoxy resin is difficult to flow to the bottom surface of the working part through the third mounting groove, the contact area between the working part and the ground soil can be ensured, and the accuracy of the measurement of the corrosion rate probe is ensured; in addition, because the upper surface and the lower surface of the fixed seat are parallel, the working part embedded in the first mounting groove is parallel to the reference part embedded in the second mounting groove, so that the distance between the working part and the reference part is kept consistent, and the heat transfer distance is consistent, thereby ensuring the uniformity of heat transfer between the working part and the reference part, ensuring the temperature consistency of the working part and the reference part, and improving the measurement accuracy of the corrosion rate probe; in addition, the working part, the reference part and the connecting part are embedded in the corresponding first, second and third mounting grooves, so that the combination of the test piece and the fixed seat can be completed, the assembly difficulty of parts is reduced, and the manufacturing cost is also reduced; the working part and the reference part are embedded with the corresponding first mounting groove and the corresponding second mounting groove, so that the working part and the reference part can be fully contacted with the fixing seat, the full heat transfer is ensured, and the temperature consistency of the working part and the reference part is assisted to be ensured.

In another embodiment of the present invention, the working portion, the reference portion and the connecting portion of the test piece are integrally formed by pressing. Therefore, the production process of the test piece can be simplified, and the connection part can provide better bonding strength and elasticity for the working part and the reference part due to the stamping and integral forming, so that the working part and the reference part can be embedded in the corresponding first mounting groove and the second mounting groove more tightly, the tight bonding degree of the working part and the fixed seat is ensured, the heat transfer efficiency is ensured, and the temperature consistency of the working part and the reference part is improved.

In another embodiment of the present invention, the bottom surface of the working portion is flush with the lower surface of the fixing base and the lower end of the housing. Therefore, the bottom surface of the working part can be ensured to be completely contacted with the soil, and the difficulty in arranging the corrosion rate probe is reduced.

As another implementation of the present technical solution, a top surface of the reference portion is flush with an upper surface of the fixing base. Thereby, the potting operation of the potting portion can be facilitated.

As another implementation of the present solution, the working portion and the reference portion have the same shape, and the projection of the working portion and the reference portion in the vertical direction coincides. Therefore, the properties such as resistance, surface area and the like of the two probes can be kept consistent when the two probes are not in operation, the distances between the two probes in the axial direction are completely the same, and the consistency of heat transfer distances is also ensured, so that the structural consistency and the temperature consistency are further improved, and the measurement accuracy of the corrosion rate probe is ensured.

In another embodiment of the present invention, the working portion and the reference portion are both in a serpentine arrangement. Therefore, the lengths of the working part and the reference part can be increased, and the resistance values of the working part and the reference part are improved, so that the resistance value change caused by corrosion is more obvious, and the measuring sensitivity of the corrosion rate probe is improved.

As another implementation of the present technical solution, one end of each of the three wires is connected to an end of the working portion away from the connecting portion, an end of the reference portion away from the connecting portion, and a middle of the connecting portion. Therefore, the accuracy of measuring the resistance value of each part of the test piece can be ensured, and the measuring accuracy of the corrosion rate probe can be ensured.

As another implementation of the technical solution, a wire passing groove is longitudinally formed in a side wall surface of the fixing base, and a wire connected to an end portion of the working portion penetrates through the wire passing groove so that the other end of the wire penetrates out of the housing upward along the inside of the housing.

In another embodiment of the present invention, the potting portion is formed by pouring epoxy resin, a bottom surface of the potting portion is attached to an upper surface of the fixing base, and the other ends of the three wires pass through the potting portion along the inside of the housing and penetrate out of the housing.

As another implementation of the present solution, the housing is made of an insulating material; the fixing seat is made of heat-conducting ceramics; the fixing seat is arranged at the lower part in the shell in an interference fit mode. The installation process difficulty of the fixing base can be simplified through the interference fit mode, and the working portion and the reference portion can be quickly subjected to heat transfer through the fixing base made of the heat-conducting ceramic, so that the temperature consistency of the working portion and the reference portion is ensured, the influence of temperature difference on resistance detection is reduced, and the accuracy of measuring the corrosion rate probe is ensured.

Drawings

FIG. 1 is a schematic side cross-sectional view of a corrosion rate probe according to the present invention;

fig. 2 is a schematic view of a fixing base of the present invention;

FIG. 3 is a schematic view of a test piece according to the present invention;

FIG. 4 is a schematic view of the fixing base with the test piece embedded therein according to the present invention;

fig. 5 is a schematic view of another angle of the fixing base embedded with the test piece of the present invention.

Symbolic illustration in the drawings:

1, a shell; 2, fixing a base; 21 a first mounting groove; 22 a second mounting groove; 23 a third mounting groove; 3, test piece; 31 a working part; 32 reference part; 33 a connecting part; 4, an encapsulating part; 5 conducting wires.

Detailed Description

The following detailed description and technical contents of the present invention are described with reference to the drawings, but the drawings are only for reference and illustration and are not intended to limit the present invention.

As shown in fig. 1, for a specific embodiment of the corrosion rate probe of the present invention, the corrosion rate probe is used for monitoring the corrosion rate outside the pipeline, and comprises: the present invention is described with reference to the cylindrical housing 1 and the cylindrical holder 2 in the present embodiment, but the present invention is not limited to the shapes of the housing and the holder, although the present invention is described with reference to the cylindrical housing 1, the cylindrical holder 2, the test piece 3, the potting portion 4, and the three wires 5, in which the shape of the inside of the cylindrical housing 1 corresponds to the shape of the cylindrical holder 2.

As shown in fig. 1 and 2, the upper surface and the lower surface of the fixing base 2 are parallel, the lower surface is provided with a first mounting groove 21, the upper surface is provided with a second mounting groove 22, and the side wall surface of the fixing base 2 is provided with a third mounting groove 23 communicating the first mounting groove 21 with the second mounting groove 22. As shown in fig. 3, the test piece 3 includes a working portion 31, a reference portion 32, and a connecting portion 33 connected between the working portion 31 and the reference portion 32. As shown in fig. 4 and 5, the working portion 31 is correspondingly inserted into the first installation groove 21, the reference portion 32 is correspondingly inserted into the second installation groove 22, and the connection portion 33 is correspondingly inserted into the third installation groove 23. The test piece 3 can be formed by welding the working portion 31, the reference portion 32 and the connecting portion 33, and in this embodiment, the working portion 31, the reference portion 32 and the connecting portion 33 of the test piece 3 are integrally formed by stamping, which not only simplifies the production process of the test piece, but also improves the tight bonding between the working portion 31 and the reference portion 32 by providing the connecting portion 33 with better bonding strength and elasticity for the working portion 31 and the reference portion 32 due to the integral forming by stamping, so that the two can be more tightly embedded in the corresponding first and

second mounting grooves

21, 22, and the tight bonding between the two and the fixing base 2 is improved, and the working portion 31 and the reference portion 32 are embedded in the first and

second mounting grooves

21, 22 without using adhesive for auxiliary fixation, so that the rest surfaces of the working portion 31 except the bottom surface can be fully contacted with the inner wall of the first mounting groove 21, and the working portion 31 and the fixing base 2 have good heat transfer, similarly, the rest surfaces of the reference part 32 except the top surface can be fully contacted with the inner wall of the second mounting groove 22, so that the reference part 32 and the fixing seat 2 have good heat transfer, thereby ensuring the heat transfer efficiency and improving the temperature consistency of the reference part and the fixing seat. In addition, as shown in fig. 1 to 5, the working portion 31 and the reference portion 32 are corresponding to the shapes of the first mounting groove 21 and the second mounting groove 22, so that the working portion 31 and the reference portion 32 can be ensured to be correctly and stably embedded in the first mounting groove 21 and the second mounting groove 22, in the embodiment, the working portion 31 and the reference portion 32 are identical in shape and are both in a serpentine arrangement shape, and the projections of the working portion 31 and the reference portion 32 in the vertical direction are overlapped, so that the electric resistance, the surface area and other properties of the working portion 31 and the reference portion 32 can be kept consistent when the working portion and the reference portion 32 are not in operation, and the distances between the two portions in the axial direction are completely identical, so that the consistency of the heat transfer distance is ensured, and the structural consistency and the temperature consistency are further improved; in addition, the snake-shaped arrangement of the working part 31 and the reference part 32 can increase the length of the two parts and improve the resistance value of the two parts, so that the resistance value change caused by corrosion is more obvious, and the measuring sensitivity of the corrosion rate probe is improved.

As shown in fig. 1, the fixing base 2 embedded with the test piece 3 is installed at the lower part of the housing 1, and the lower surface of the fixing base 2 faces outward, in this embodiment, the fixing base 2 is installed at the lower part of the housing 1 by interference fit, and the installation process of interference fit can not only ensure the stability of component installation, but also simplify the process difficulty of installing the fixing base 2. One ends of the three wires 5 are respectively connected with the working part 31, the reference part 32 and the connecting part 33, and the other ends of the three wires 5 extend upwards out of the shell 1 along the inside of the shell 1 to be connected with external measuring equipment. More specifically, one end of each of the three wires 5 is connected to the end of the working portion 31 away from the connecting portion 33, the end of the reference portion 32 away from the connecting portion 33, and the middle of the connecting portion 33, so as to ensure the accuracy of measuring the resistance of each portion of the test strip 3. A wire passing groove (not shown) can be longitudinally formed on the side wall surface of the fixed seat 2, and a wire connected with the end part of the working part 31 passes through the wire passing groove, so that the other end of the wire passes through the shell upwards along the inside of the shell. In this embodiment, the potting portion 4 is formed by pouring epoxy resin into the housing 1, and the bottom surface of the potting portion 4 is attached to the upper surface of the fixing base 2. The other ends of the three wires 5 upwardly penetrate the potting portion 4 along the inside of the housing 1 and penetrate out of the housing 1, in this embodiment, the manner that the other ends of the three wires 5 upwardly penetrate the potting portion 4 is not limited, the other ends of the three wires 5 may upwardly penetrate the potting portion 4 along the inner wall surface of the housing 1, or the three wires 5 may be bundled together and provided with a protective sheath at the periphery, and then the potting portion 4 is upwardly penetrated through the middle portion or the side of the potting portion 4 when the potting portion 4 is poured.

In addition, in the embodiment, the bottom surface of the working portion 31 is flush with the lower surface of the fixing base 2 and the lower end portion of the housing 1, so that the bottom surface of the working portion 31 can be ensured to be completely contacted with soil, and the difficulty in arranging the corrosion rate probe is reduced. The top surface of the reference portion 32 is flush with the upper surface of the fixing base 2, so that the potting operation of the potting portion 4 can be facilitated. This shell 1 can be made by insulating material, and this fixing base 2 can be made by heat conduction ceramic, and this work portion 31 can be quick with the fixing base 2 heat transfer that reference portion 32 made through heat conduction ceramic to guaranteed the uniformity of work portion 31 with reference portion 32 temperature, and reduced the influence that the temperature difference detected the resistance, and then guaranteed the measuring accuracy of corrosion rate probe.

Therefore, the lower port of the shell 1 can be mostly closed by installing the fixed seat 2. Because there may be gaps between the connection part 33 and the third mounting groove 23, between the connection part 33 and the housing 1, and between the wire passing groove and the lead wire and the housing, when the potting part 4 is poured, only the bottom end of the third mounting groove 23 and the bottom end of the wire passing groove are needed to be sealed, so that the pouring of the potting part 4 can be performed, thereby simplifying the operation difficulty of sealing the lower port of the housing 1, and reducing the manufacturing cost, and because the connection part 33 is embedded in the third mounting groove 23 and the lead wire passes through the wire passing groove, the poured epoxy resin is not easy to flow to the bottom surface of the working part 31 through the third mounting groove 23 or the wire passing groove, thereby ensuring the contact area between the working part 31 and the ground soil, and ensuring the accuracy of the measurement of the corrosion rate probe. In addition, because the upper surface of fixing base 2 is parallel with the lower surface for the work portion 31 of inlaying in first mounting groove 21 is also parallel with the reference portion 32 of inlaying in second mounting groove 22, so that the interval between the two keeps unanimous, and heat transfer's distance is unanimous, thereby has guaranteed the homogeneity of heat transfer between work portion 31 and the reference portion 32, has guaranteed the uniformity of both temperatures, has improved the accuracy that the corrosion rate probe measured. In addition, the working portion 31, the reference portion 32 and the connecting portion 33 are embedded in the corresponding first, second and

third mounting grooves

21, 22 and 23, so that the test strip 3 can be combined with the fixing base 2, the assembly difficulty of the components is reduced, and the manufacturing cost is reduced, while the working portion 31 and the reference portion 32 are embedded in the corresponding first and

second mounting grooves

21 and 22, so that the two can be fully contacted with the fixing base 2, the sufficient heat transfer is ensured, and the temperature consistency of the two is ensured in an auxiliary manner.

Above only be the preferred embodiment of the utility model discloses a not be used for injecing the utility model discloses a patent range, other applications the utility model discloses an equivalent change that the patent design was done all should belong to the patent protection scope of the utility model.

Claims

1. A corrosion rate probe for monitoring the corrosion rate outside a pipe, the corrosion rate probe comprising: a cylindrical housing, a test piece, three wires and an encapsulating part; wherein the corrosion rate probe further comprises: a columnar fixing seat; the upper surface and the lower surface of the fixed seat are parallel, the lower surface is provided with a first mounting groove, the upper surface is provided with a second mounting groove, and the side wall surface of the fixed seat is provided with a third mounting groove communicated with the first mounting groove and the second mounting groove; the test piece is provided with a working part, a reference part and a connecting part connected between the working part and the reference part, the working part is correspondingly embedded in the first mounting groove, the reference part is correspondingly embedded in the second mounting groove, and the connecting part is correspondingly embedded in the third mounting groove; installing a fixed seat embedded with the test piece at the lower part in the shell, and enabling the lower surface of the fixed seat to face outwards; one ends of the three wires are respectively connected with the working part, the reference part and the connecting part, and the other ends of the three wires penetrate out of the shell upwards along the inside of the shell; the embedment portion embedment is in inside the shell and be located the top of fixing base.

2. The corrosion rate probe of claim 1, wherein the working portion, the reference portion and the connecting portion of the test strip are integrally formed by stamping.

3. The corrosion rate probe of claim 1, wherein a bottom surface of the working portion is flush with a lower surface of the holder and a lower end of the housing.

4. The corrosion rate probe of claim 1, wherein a top surface of the reference portion is flush with an upper surface of the holder.

5. The corrosion rate probe of claim 1, wherein the working portion and the reference portion are identical in shape and the projections of the working portion and the reference portion in the vertical direction coincide.

6. The corrosion rate probe of claim 5, wherein the working portion and the reference portion are each shaped in a serpentine arrangement.

7. The corrosion rate probe of claim 6, wherein one end of the three wires is connected to the end of the working portion remote from the connection portion, the end of the reference portion remote from the connection portion, and the middle of the connection portion.

8. The corrosion rate probe of claim 7, wherein a wire passing groove is longitudinally formed in a side wall surface of the fixing base, and a wire connected to an end of the working portion passes through the wire passing groove so that the other end of the wire passes through the housing upward along the inside of the housing.

9. The corrosion rate probe of claim 1, wherein the potting is epoxy-potted, a bottom surface of the potting is attached to an upper surface of the mounting base, and the other ends of the three wires extend upwardly through the potting and out of the housing along an interior of the housing.

10. The corrosion rate probe of claim 1, wherein said housing is made of an insulating material; the fixing seat is made of heat-conducting ceramic; the fixing seat is arranged at the lower part in the shell in an interference fit mode.