Corrosion monitoring probe with multi-stage leak-proof protection structure
The corrosion monitoring probe, with its multi-stage sealing design, solves the problem of easy failure of single-stage seals, achieves media isolation and stable signal transmission, reduces maintenance costs and extends service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 金华市特种设备检验检测院(金华市特种设备应急处置指挥中心)
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-14
AI Technical Summary
The single-stage sealing structure of existing corrosion monitoring probes is prone to aging and failure, which can cause the medium to seep into the probe, affecting the accuracy of monitoring data and potentially causing equipment failure.
The system employs a multi-level leak-proof protection structure, including a top sealing assembly and a bottom sealing assembly. Each assembly consists of a first sealing ring, a top sealing airbag, a joint sealing seat, a second sealing ring, a bottom first sealing airbag, and a bottom second sealing airbag, forming multiple sealing layers to ensure that the medium does not penetrate.
It effectively prevents media infiltration, ensures stable transmission of monitoring signals, reduces maintenance costs, adapts to complex industrial environments, and extends the probe's service life.
Smart Images
Figure CN122384879A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of corrosion monitoring probe technology, and in particular to a corrosion monitoring probe with a multi-level leak-proof protection structure. Background Technology
[0002] Corrosion monitoring probes are key sensors used in industrial environments to monitor the corrosion status of equipment or pipelines in real time. Common structural forms include electrochemical corrosion probes, resistance probes, and inductive monitoring probes. These probes typically consist of metal electrodes or sensing elements, insulating and sealing components, a metal housing, and signal transmission wires. They are installed in the medium being measured (such as petroleum, chemical liquids, seawater, or high-temperature steam). Existing probes generally employ a single-stage sealing structure, such as an O-ring rubber seal at the wire lead-out end or a sealant coating at the probe housing mating surface, to isolate the internal electrical components from the external corrosive medium. Some probes also fill the sensing element with epoxy resin or polytetrafluoroethylene as an auxiliary insulating layer, thereby ensuring basic airtightness and electrical insulation performance under normal operating conditions.
[0003] However, the corrosion monitoring probe with the above-mentioned single-seal structure has obvious defects in actual long-term service. First, after long-term exposure to medium pressure fluctuations, temperature cycles and chemical erosion, the single O-ring or sealing layer is prone to material aging, loss of elasticity or interface peeling, leading to seal failure. Once the primary seal is breached, corrosive media (such as acid and alkaline solutions, chloride-containing water vapor or hydrogen sulfide gas) will quickly seep into the probe, not only directly corroding the metal electrodes and wire solder joints, but also causing signal short circuits or drift, distorting the monitoring data. More seriously, continuous leakage of the medium may spread along the wire sheath to the external junction box, causing a chain of equipment failures.
[0004] Therefore, how to provide a corrosion monitoring probe with a multi-level leak-proof protection structure is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0005] One objective of this invention is to provide a corrosion monitoring probe with a multi-level leak-proof protection structure, which solves the problems mentioned in the background art.
[0006] A corrosion monitoring probe with a multi-level leak-proof protection structure according to an embodiment of the present invention includes a housing, a top sealing cover, and a columnar mounting base. The columnar mounting base is movably installed inside the housing, and the top sealing cover is threaded onto the top of the housing. The top and bottom of the columnar mounting base have slots, into which a reference test piece and a corrosion test piece are movably inserted, respectively. A top sealing component is provided at the bottom of the top sealing cover corresponding to a positioning component to seal the top sealing cover. A bottom sealing component is provided at the bottom of the housing to seal the columnar mounting base and the bottom end of the housing. A conductive component is provided on the columnar mounting base corresponding to the reference test piece and the corrosion test piece. A through hole is provided on the top sealing cover, into which a wire harness is movably inserted, and the bottom end of the wire harness is fixedly connected to the conductive component.
[0007] Positioning components for positioning the reference test piece and the corrosion test piece are fixedly installed at the top and bottom of the columnar mounting base, respectively, corresponding to the reference test piece and the corrosion test piece.
[0008] The positioning assembly includes a fixed rod, a movable sleeve, pressure blocks, and a spring. The fixed rod is cylindrical and fixedly mounted on the end face of the columnar mounting base. The movable sleeve and the spring are both movably fitted onto the surface of the fixed rod. One end of the spring is movably connected to a protrusion on the end face of the fixed rod, and the other end of the spring is movably connected to the end of the movable sleeve away from the columnar mounting base. The pressure block is fixedly mounted on the surface of the movable sleeve. Two sets of pressure blocks are respectively engaged with the reference test piece and the corrosion test piece at the ends away from the columnar mounting base.
[0009] Each of the two sets of pressure blocks has a side locking block fixedly installed on one side near the reference test piece and the corrosion test piece, respectively, to limit the movement of the reference test piece and the corrosion test piece.
[0010] The inner side of the top sealing cover is provided with a sealing groove near the housing. The top sealing assembly includes a first sealing ring and a top sealing airbag. The first sealing ring is movably built into the inside of the sealing groove and is abutted against the top of the housing. The inner side wall of the housing is provided with a top annular groove near the first sealing ring. The top sealing airbag is fixedly installed at the bottom of the top sealing cover, and the outer side of the top sealing airbag is movably engaged with the inside of the top annular groove.
[0011] The top sealing assembly also includes a connector sealing seat, which is fixedly installed on the top of the top sealing cover and movably sleeved on the surface of the wire harness. The top sealing assembly also includes a movable guide post, a top guide groove, and a compression plate. The compression plate is fixedly installed on the lower surface of the top sealing airbag, the movable guide post is fixedly installed on the top of the compression plate and offset from the top sealing airbag, the top guide groove is opened on the lower surface of the top sealing cover, and the movable guide post is movably inserted into the interior of the top guide groove.
[0012] The bottom sealing assembly includes a first bottom sealing airbag, an air hole, a second bottom sealing airbag, and an external threaded sealing ring. The inner wall of the housing is provided with an inner ring thread near the lower surface. The external threaded sealing ring is threaded onto the inner wall of the housing and abuts against the bottom end of the columnar mounting base. The first bottom sealing airbag is fixedly installed at the top end of the external threaded sealing ring, and the second bottom sealing airbag is fixedly connected to the bottom end of the external threaded sealing ring. The air hole is opened inside the external threaded sealing ring to connect the second bottom sealing airbag and the first bottom sealing airbag.
[0013] The inner wall of the housing is convex, and the bottom of the columnar mounting base is also a boss. The cross-sectional shape of the columnar mounting base is "T". A second sealing ring is fixedly installed on the top of the boss on the columnar mounting base. A bottom first protrusion is fixedly installed on the inner wall of the housing corresponding to the second sealing ring. A bottom annular groove is opened inside the housing corresponding to the bottom first protrusion. A conical groove is provided on the inner wall of the housing near the air hole. A bottom second protrusion is fixedly installed on the inner side of the conical groove. The surface of the second sealing ring abuts against the bottom first protrusion and the bottom annular groove.
[0014] The conductive assembly includes a conductive post, a reference elastic conductive sheet, and a corrosion elastic conductive sheet. The conductive post is built into the interior of a columnar mounting base, and the top and bottom ends of the conductive post extend to the exterior of the columnar mounting base. The reference elastic conductive sheet is fixedly mounted on the end face of the columnar mounting base at both ends of the reference test piece by screws. The corrosion elastic conductive sheet is fixedly mounted on the bottom end of the conductive post corresponding to the end face of the corrosion test piece. The inner side of the reference elastic conductive sheet and the inner side of the corrosion elastic conductive sheet are in contact with the end face of the reference test piece. The wire harness is fixedly connected to the reference elastic conductive sheet and the end of the conductive post near the top sealing cover, respectively.
[0015] The beneficial effects of this invention are: This invention effectively solves the problems of easy aging and failure of single-stage seals and easy media penetration in existing corrosion monitoring probes by using a multi-stage sealing design of top and bottom sealing components, thus achieving reliable isolation between the probe's internal and external corrosive media.
[0016] The top sealing assembly forms a double seal through the first sealing ring, the top sealing airbag, and the joint sealing seat. The bottom sealing assembly forms a triple seal through the second sealing ring, the bottom first sealing airbag, and the bottom second sealing airbag. The multi-level sealing provides layer-by-layer protection. Even if one level of sealing fails, the remaining seals can still function to prevent the medium from seeping in and corroding the internal components.
[0017] The flexible snap-fit design of the positioning component ensures that the reference test piece and corrosion test piece are installed securely and can be quickly disassembled and replaced. At the same time, the conductive components have tight contact to ensure stable transmission of monitoring signals, making it suitable for long-term use in industrial corrosive environments and reducing maintenance costs. Attached Figure Description
[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall three-dimensional structure of a corrosion monitoring probe with a multi-level leak-proof protection structure proposed in this invention.
[0019] Figure 2 This is a three-dimensional cross-sectional structural diagram of the outer shell, top sealing assembly, and bottom sealing assembly of a corrosion monitoring probe with a multi-level leak-proof protection structure proposed in this invention.
[0020] Figure 3 This is a three-dimensional structural diagram of a corrosion monitoring probe with a multi-level leak-proof protection structure proposed in this invention, showing its disassembled state.
[0021] Figure 4 This is a three-dimensional structural diagram of the positioning component in a corrosion monitoring probe with a multi-level leak-proof protection structure proposed in this invention.
[0022] Figure 5 This is a three-dimensional structural diagram of the bottom sealing assembly of a corrosion monitoring probe with a multi-level leak-proof protection structure proposed in this invention.
[0023] Figure 6 This invention proposes a corrosion monitoring probe with a multi-level leak-proof protection structure. Figure 3 A magnified structural diagram of point A in the middle.
[0024] The attached diagram shows: 1. Housing; 2. Top sealing cover; 3. Top sealing assembly; 4. Columnar mounting base; 5. Bottom sealing assembly; 6. Wiring harness; 7. Sealing groove; 8. First sealing ring; 9. Top sealing airbag; 10. Connector sealing seat; 11. Movable guide post; 12. Top guide groove; 13. Reference test piece; 14. Corrosion test piece; 15. Positioning assembly; 16. Extrusion plate; 17. Conductive post; 18. Reference elastic conductive sheet; 19. Corrosion elastic conductive sheet; 20. Second sealing ring; 21. Bottom first sealing airbag; 22. Air hole; 23. Bottom second sealing airbag; 24. External thread sealing ring; 25. Bottom first protrusion; 26. Bottom annular groove; 27. Bottom second protrusion; 28. Conical groove; 29. Fixing rod; 30. Movable sleeve; 31. Pressure block; 32. Spring component; 33. Top annular groove; 34. Conductive assembly. Detailed Implementation
[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.
[0026] Example 1 refer to Figures 1-6 In this embodiment, the device includes a housing 1, a top sealing cover 2, and a columnar mounting base 4. The columnar mounting base 4 is movably installed inside the housing 1. The top sealing cover 2 is threaded onto the top of the housing 1. The top and bottom of the columnar mounting base 4 are provided with slots, and a reference test piece 13 and a corrosion test piece 14 are respectively movably inserted into the slots.
[0027] In practice, the housing 1 serves as the external protective carrier for the probe and is made of corrosion-resistant material, which can effectively resist the erosion of external media. The columnar mounting base 4 is movably installed inside the housing 1, providing a stable mounting foundation for the reference test piece 13, the corrosion test piece 14, and the conductive component 34. The top sealing cover 2 is fixed to the housing 1 by a threaded connection, which is convenient for disassembly and assembly and facilitates later maintenance. The reference test piece 13 and the corrosion test piece 14 are inserted through slots, which can be quickly positioned and installed, providing sensitive elements for corrosion monitoring.
[0028] The bottom of the top sealing cover 2 is provided with a top sealing component 3 corresponding to the positioning component 15 to seal the top sealing cover 2. A sealing groove 7 is provided on the inner side of the top sealing cover 2 near the housing 1. The top sealing component 3 includes a first sealing ring 8 and a top sealing airbag 9. The first sealing ring 8 is movably built into the sealing groove 7 and is abutted against the top of the housing 1. A top annular groove 33 is provided on the inner side wall of the housing 1 near the first sealing ring 8. The top sealing airbag 9 is fixedly installed at the bottom of the top sealing cover 2, and the outer side of the top sealing airbag 9 is movably engaged in the interior of the top annular groove 33.
[0029] In specific implementation, the sealing groove 7 is used to limit the installation of the first sealing ring 8 and prevent the first sealing ring 8 from shifting. The first sealing ring 8 abuts against the top of the housing 1, forming the first sealing defense line at the top. The top annular groove 33 provides a snap-fit space for the top sealing airbag 9. After the top sealing airbag 9 is squeezed, it fits tightly against the inner wall of the top annular groove 33 to form the second seal. The double seal can effectively prevent the medium from seeping in from the connection between the top sealing cover 2 and the housing 1.
[0030] The bottom of the housing 1 is provided with a bottom sealing assembly 5 to seal the columnar mounting base 4 and the bottom end of the housing 1. The bottom sealing assembly 5 includes a bottom first sealing airbag 21, an air hole 22, a bottom second sealing airbag 23 and an external threaded sealing ring 24. The inner wall of the housing 1 is provided with an inner ring thread near the lower surface. The external threaded sealing ring 24 is threaded to the inner wall of the housing 1 and abuts against the bottom end of the columnar mounting base 4. The bottom first sealing airbag 21 is fixedly installed at the top end of the external threaded sealing ring 24. The bottom second sealing airbag 23 is fixedly connected to the bottom end of the external threaded sealing ring 24. The air hole 22 is opened inside the external threaded sealing ring 24 to connect the bottom second sealing airbag 23 and the bottom first sealing airbag 21.
[0031] In practice, the external threaded sealing ring 24 is fixed to the housing 1 by a threaded connection. When rotated, it can push the columnar mounting base 4 to be positioned upwards, and at the same time drive the bottom first sealing airbag 21 and the bottom second sealing airbag 23 to move synchronously. The air hole 22 realizes the air pressure balance of the two airbags, ensuring that the two are subjected to uniform force and tight sealing. The bottom first sealing airbag 21 abuts against the bottom of the columnar mounting base 4, and the bottom second sealing airbag 23 fits against the inner wall of the housing 1, forming a double seal at the bottom and improving the sealing reliability.
[0032] The columnar mounting base 4 is equipped with a conductive component 34 corresponding to the reference test piece 13 and the corrosion test piece 14. A through hole is opened on the top sealing cover 2, and a wire harness 6 is movably inserted into the through hole. The bottom end of the wire harness 6 is fixedly connected to the conductive component 34. The conductive component 34 includes a conductive post 17, a reference elastic conductive sheet 18, and a corrosion elastic conductive sheet 19. The conductive post 17 is built into the columnar mounting base 4, and the top and bottom ends of the conductive post 17 extend to the outside of the columnar mounting base 4. The reference elastic conductive sheet 18 is fixedly installed on the end face of the columnar mounting base 4 at both ends of the reference test piece 13 by screws. The corrosion elastic conductive sheet 19 is fixedly installed on the bottom end of the conductive post 17 corresponding to the end face of the corrosion test piece 14. The inner side of the reference elastic conductive sheet 18 abuts against the end face of the reference test piece 13, and the inner side of the corrosion elastic conductive sheet 19 abuts against the end face of the corrosion test piece 14. The wire harness 6 is fixedly connected to the reference elastic conductive sheet 18 and the end of the conductive post 17 near the top sealing cover 2, respectively.
[0033] In specific implementation, the built-in design of the conductive post 17 can avoid the sealing problem when connected to the columnar mounting base 4. Here, the conductive post 17 needs to be built into the interior after the columnar mounting base 4 is produced. It can be manufactured using existing processes, which are existing technologies and will not be elaborated here. To ensure stable conductivity, the reference elastic conductive sheet 18 and the corrosion elastic conductive sheet 19 use elastic contact with the reference test piece 13 and the corrosion test piece 14 to ensure tight contact and avoid poor contact that could lead to distortion of the monitoring signal. The wire harness 6 is used to transmit the monitoring signal. The through-hole design facilitates the installation of the wire harness 6, and at the same time, it works with the top sealing assembly 3 to achieve sealing protection at the wire harness 6.
[0034] Example 2 refer to Figures 1-6In this embodiment, positioning components 15 for positioning the reference test piece 13 and the corrosion test piece 14 are fixedly installed at the top and bottom of the columnar mounting base 4, respectively. The positioning components 15 include a fixed rod 29, a movable sleeve 30, a pressure block 31, and a spring 32. The fixed rod 29 is cylindrical and fixedly installed on the end face of the columnar mounting base 4. The movable sleeve 30 and the spring 32 are both movably sleeved on the surface of the fixed rod 29. One end of the spring 32 is movably connected to a protrusion on the end face of the fixed rod 29, and the other end of the spring 32 is movably connected to the end of the movable sleeve 30 away from the columnar mounting base 4. The pressure block 31 is fixedly installed on the surface of the movable sleeve 30. The two sets of pressure blocks 31 are respectively engaged with the ends of the reference test piece 13 and the corrosion test piece 14 away from the columnar mounting base 4.
[0035] In practice, the fixed rod 29 provides installation support for the movable sleeve 30 and the spring 32. The elastic force of the spring 32 pushes the movable sleeve 30 to move closer to the columnar mounting base 4, thereby causing the pressure block 31 to be tightly locked onto the surface of the reference test piece 13 and the corrosion test piece 14, so as to achieve stable positioning of the test piece and avoid displacement of the test piece during use, which would affect the monitoring accuracy. At the same time, the movable sleeve 30 can move along the fixed rod 29, which is convenient for disassembling and assembling the test piece.
[0036] Example 3 refer to Figures 1-6 In this embodiment, side clamping blocks that limit the movement of the reference test piece 13 and the corrosion test piece 14 are fixedly installed on the two sets of pressure blocks 31 on the side close to the reference test piece 13 and the corrosion test piece 14, respectively.
[0037] In practice, the side blocks can limit the movement of the reference test piece 13 and the corrosion test piece 14 from both sides, preventing the test pieces from sliding along the length of the slot, further improving the stability of the test piece installation. At the same time, the design of the side blocks does not affect the disassembly and assembly of the test pieces, ensuring that the test piece replacement process is convenient and efficient, and avoiding poor contact of the conductive component 34 due to test piece displacement.
[0038] Example 4 refer to Figures 1-6 In this embodiment, the top sealing assembly 3 further includes a connector sealing seat 10, which is fixedly installed on the top of the top sealing cover 2 and is movably sleeved on the surface of the wire harness 6. The top sealing assembly 3 also includes a movable guide post 11, a top guide groove 12, and a compression plate 16. The compression plate 16 is fixedly installed on the lower surface of the top sealing airbag 9, the movable guide post 11 is fixedly installed on the top of the compression plate 16 and is offset from the top sealing airbag 9, the top guide groove 12 is opened on the lower surface of the top sealing cover 2, and the movable guide post 11 is movably inserted into the interior of the top guide groove 12.
[0039] In practice, the joint sealing seat 10 is fitted onto the surface of the wire harness 6 to form the first seal at the wire harness 6. Together with the top sealing airbag 9, it achieves a double seal on the wire harness 6, preventing the medium from seeping in along the wire harness 6. The movable guide post 11 cooperates with the top guide groove 12 to guide the movement of the extrusion plate 16, ensuring that the extrusion plate 16 smoothly extrudes the top sealing airbag 9, so that the top sealing airbag 9 is evenly stressed and the sealing effect is improved.
[0040] Example 5 refer to Figures 1-6 In this embodiment, the inner wall of the housing 1 is convex, and the bottom of the columnar mounting base 4 is also a boss. The cross-sectional shape of the columnar mounting base 4 is "T". A second sealing ring 20 is fixedly installed on the top of the boss on the columnar mounting base 4. A bottom first protrusion 25 is fixedly installed on the inner wall of the housing 1 corresponding to the second sealing ring 20. A bottom annular groove 26 is opened inside the housing 1 corresponding to the bottom first protrusion 25. A conical groove 28 is provided on the inner wall of the housing 1 near the air hole 22. A bottom second protrusion 27 is fixedly installed on the inner side of the conical groove 28. The surface of the second sealing ring 20 abuts against the bottom first protrusion 25 and the bottom annular groove 26.
[0041] In practice, the "T"-shaped boss design of the columnar mounting base 4 can cooperate with the protrusion on the inner wall of the housing 1 to achieve positioning and limiting. The second sealing ring 20 abuts between the bottom first protrusion 25 and the bottom annular groove 26 to form the first seal at the bottom, enhancing the reliability of the seal. The conical groove 28 and the bottom second protrusion 27 can increase the contact area of the bottom second sealing airbag 23, making the seal tighter. At the same time, the bottom first protrusion 25 and the bottom second protrusion 27 can enhance the structural strength of the inner wall of the housing 1 and extend the service life of the probe.
[0042] The working principle of this invention is: In use, first insert the reference test piece 13 and the corrosion test piece 14 into the slots of the columnar mounting base 4 respectively. The spring 32 of the positioning component 15 pushes the pressure block 31 to clamp the test piece, and the side locking block assists in limiting the position, ensuring that the test piece is installed firmly, thereby ensuring stable transmission of monitoring signals. The positioning component 15 achieves stable positioning of the test piece. The fixing rod 29 in the positioning component 15 is fixed to the end face of the columnar mounting base 4. The spring 32 is sleeved on the surface of the fixing rod 29. Its elasticity pushes the movable sleeve 30 to move closer to the columnar mounting base 4, thereby driving the pressure block 31 to be tightly clamped onto the surface of the test piece. The side locking blocks assist in limiting the position from both sides of the test piece, ensuring that the test piece is installed firmly, thereby ensuring stable transmission of monitoring signals. Then, the columnar mounting base 4 is placed inside the housing 1, and the external thread sealing ring 24 is rotated to make it abut against the bottom of the columnar mounting base 4. The side of the columnar mounting base 4 has a positioning strip to limit the columnar mounting base 4 and prevent it from rotating, thereby driving the bottom first sealing airbag 21 and the bottom second sealing airbag. 23. The air pores 22 balance the air pressure of the two airbags. The second sealing ring 20 abuts against the first bottom protrusion 25 and the bottom annular groove 26 to form a multi-layer bottom seal, thereby effectively preventing the medium from seeping in from the bottom. Then, the top sealing cover 2 is threaded to the top of the housing 1. When it moves down, the extrusion plate 16 is blocked by the positioning component 15. The top sealing cover 2 continues to move down, causing the extrusion plate 16 to drive the movable guide post 11 to move up along the top guide groove 12, extruding the top sealing airbag 9 to fit against the top annular groove 33 and the wire harness 6. The first sealing ring 8 abuts against the top of the housing 1. The connector sealing seat 10 is fitted on the surface of the wire harness 6 to form a multi-layer top seal, thereby solving the problem of easy failure of the existing single-stage seal. The elastic conductive sheet of the conductive component 34 is in close contact with the test piece. The monitoring signal is transmitted through the wire harness 6. When disassembling and assembling the test piece, the movable sleeve 30 can be moved to unlock the pressure block 31. The operation is convenient. Another effect not mentioned is that the multi-stage seal is adapted to complex industrial conditions such as pressure fluctuations and temperature cycles, extending the service life of the probe and reducing maintenance costs.
[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A corrosion monitoring probe with a multi-level leak-proof protection structure, characterized in that, It includes a housing (1), a top sealing cover (2) and a columnar mounting base (4), wherein the columnar mounting base (4) is movably installed inside the housing (1), and the top sealing cover (2) is threaded onto the top of the housing (1); The columnar mounting base (4) has slots at the top and bottom, and reference test piece (13) and corrosion test piece (14) are respectively movably inserted into the slots. The bottom of the top sealing cover (2) is provided with a top sealing component (3) to seal the top sealing cover (2) at the corresponding positioning component (15), and the bottom of the housing (1) is provided with a bottom sealing component (5) to seal the columnar mounting base (4) and the bottom end of the housing (1). The columnar mounting base (4) is provided with a conductive component (34) corresponding to the reference test piece (13) and the corrosion test piece (14). A through hole is opened on the top sealing cover (2), and a wire harness (6) is movably inserted into the through hole. The bottom end of the wire harness (6) is fixedly connected to the conductive component (34).
2. The corrosion monitoring probe with a multi-level leak-proof protection structure according to claim 1, characterized in that, Positioning components (15) for positioning the reference test piece (13) and the corrosion test piece (14) are fixedly installed at the top and bottom of the columnar mounting base (4) respectively.
3. A corrosion monitoring probe with a multi-level leak-proof protection structure according to claim 2, characterized in that, The positioning assembly (15) includes a fixed rod (29), a movable sleeve (30), a pressure block (31), and a spring (32). The fixed rod (29) is cylindrical and is fixedly installed on the end face of the columnar mounting base (4). The movable sleeve (30) and the spring (32) are both movably sleeved on the surface of the fixed rod (29). One end of the spring (32) is movably connected to the protrusion on the end face of the fixed rod (29), and the other end of the spring (32) is movably connected to the end of the movable sleeve (30) away from the columnar mounting base (4). The pressure block (31) is fixedly installed on the surface of the movable sleeve (30). The two sets of pressure blocks (31) are respectively snapped onto the end of the reference test piece (13) and the corrosion test piece (14) away from the columnar mounting base (4).
4. A corrosion monitoring probe with a multi-level leak-proof protection structure according to claim 3, characterized in that, On the two sets of pressure blocks (31), side clamps that limit the movement of the reference test piece (13) and the corrosion test piece (14) are fixedly installed on one side of the reference test piece (13) and the corrosion test piece (14), respectively.
5. A corrosion monitoring probe with a multi-level leak-proof protection structure according to claim 4, characterized in that, The top sealing cover (2) has a sealing groove (7) on its inner side near the housing (1). The top sealing assembly (3) includes a first sealing ring (8) and a top sealing airbag (9). The first sealing ring (8) is movably built into the inside of the sealing groove (7) and the first sealing ring (8) is abutted against the top of the housing (1). The inner wall of the housing (1) has a top annular groove (33) near the first sealing ring (8). The top sealing airbag (9) is fixedly installed at the bottom of the top sealing cover (2) and the outer side of the top sealing airbag (9) is movably engaged in the inside of the top annular groove (33).
6. A corrosion monitoring probe with a multi-level leak-proof protection structure according to claim 5, characterized in that, The top sealing assembly (3) also includes a connector sealing seat (10), which is fixedly installed on the top of the top sealing cover (2) and is movably sleeved on the surface of the wire harness (6). The top sealing assembly (3) also includes a movable guide post (11), a top guide groove (12) and a compression plate (16), which is fixedly installed on the lower surface of the top sealing airbag (9). The movable guide post (11) is fixedly installed on the top of the compression plate (16) and offset from the top sealing airbag (9). The top guide groove (12) is opened on the lower surface of the top sealing cover (2) and the movable guide post (11) is movably inserted into the inside of the top guide groove (12).
7. A corrosion monitoring probe with a multi-level leak-proof protection structure according to claim 6, characterized in that, The bottom sealing assembly (5) includes a bottom first sealing airbag (21), an air hole (22), a bottom second sealing airbag (23), and an external threaded sealing ring (24). The inner wall of the housing (1) is provided with an inner ring thread near the lower surface. The external threaded sealing ring (24) is threaded on the inner wall of the housing (1) and abuts against the bottom end of the columnar mounting base (4). The bottom first sealing airbag (21) is fixedly installed on the top end of the external threaded sealing ring (24). The bottom second sealing airbag (23) is fixedly connected to the bottom end of the external threaded sealing ring (24). The air hole (22) is opened inside the external threaded sealing ring (24) to connect the bottom second sealing airbag (23) and the bottom first sealing airbag (21).
8. A corrosion monitoring probe with a multi-level leak-proof protection structure according to claim 7, characterized in that, The inner wall of the housing (1) is convex, and the bottom of the columnar mounting base (4) is also a boss. The cross-sectional shape of the columnar mounting base (4) is "T". A second sealing ring (20) is fixedly installed on the top of the boss on the columnar mounting base (4). A bottom first protrusion (25) is fixedly installed on the inner wall of the housing (1) corresponding to the second sealing ring (20). A bottom annular groove (26) is opened inside the housing (1) corresponding to the bottom first protrusion (25). A conical surface groove (28) is provided on the inner wall of the housing (1) near the air hole (22). A bottom second protrusion (27) is fixedly installed on the inner side of the conical surface groove (28). The surface of the second sealing ring (20) abuts against the bottom first protrusion (25) and the bottom annular groove (26).
9. A corrosion monitoring probe with a multi-level leak-proof protection structure according to claim 8, characterized in that, The conductive component (34) includes a conductive post (17), a reference elastic conductive sheet (18), and a corrosion elastic conductive sheet (19). The conductive post (17) is built into the interior of the columnar mounting base (4), and the top and bottom ends of the conductive post (17) extend to the outside of the columnar mounting base (4). The reference elastic conductive sheet (18) is fixedly installed on the end face of the columnar mounting base (4) at both ends of the reference test piece (13) by screws. The corrosion elastic conductive sheet (19) is fixedly installed on the bottom end of the conductive post (17) corresponding to the end face of the corrosion test piece (14). The inner side of the reference elastic conductive sheet (18) is in contact with the end face of the reference test piece (13), and the inner side of the corrosion elastic conductive sheet (19) is in contact with the end face of the corrosion test piece (14). The wire harness (6) is fixedly connected to the reference elastic conductive sheet (18) and the conductive post (17) near the top sealing cover (2), respectively.