Waterproof structure of cathode protection acquisition instrument

Abstract

A waterproof structure of a cathode protection acquisition instrument comprises a tube body, a circuit board, a connecting line and a tube cap. External threads are arranged on the outer wall of the end, close to the pipe body, of the pipe cap, and internal threads are arranged on the inner wall of the end, provided with the opening, of the pipe body, so that the pipe cap is in threaded connection with the pipe body through matching of the external threads and the internal threads; the space between the external thread and the internal thread is filled with sealing grease, and an overflow groove is formed in the inner wall of the pipe body and used for enabling the sealing grease to overflow into the overflow groove when the pipe cap is screwed into the pipe body and axially moves to the closed position. According to the waterproof structure of the cathode protection acquisition instrument, the pipe cap in threaded connection is adopted to seal the pipe body, so that the disassembly is convenient, the glue drying waiting time generated by potting is eliminated, the finished product assembling time is shortened, and the production efficiency is improved; the overflow groove prevents the sealing grease from seeping out of the pipe body, a sealing structure filled with the sealing grease can be formed, and the sealing effect is further improved; only the open end of the pipe body needs to be sealed, and the sealing waterproof difficulty is low.

Description

Technical Field

[0001] This utility model belongs to the field of corrosion protection technology, and in particular relates to a waterproof structure for a cathodic protection data acquisition instrument. Background Technology

[0002] A cathodic protection data acquisition instrument is a device used to monitor and protect underground metal structures (such as pipes and cables). Its main function is to determine whether the underground metal structure is effectively protected by measuring the potential difference between the underground metal structure and a reference electrode. This allows for timely adjustment of the potentiostat output to ensure the underground metal structure is within an effective potential range, preventing damage from corrosion and extending its service life. However, in practical applications, these devices often need to operate in harsh, humid environments; therefore, their waterproof performance is crucial to the reliability and lifespan of the equipment.

[0003] In existing technology, the structure of a cathodic protection data acquisition (CPAG) mainly includes a tube, a circuit board, and a wiring structure. The wiring structure includes power lines and signal lines. The circuit board is housed within the tube. Both the power lines and signal lines are connected to a current plate and extend out of the tube. Connecting the circuit board to the power supply enables power supply to the circuit board, and connecting the circuit board to the reference electrode and the underground metal structure enables potential difference measurement. The CPAG achieves waterproofing by potting adhesive at both ends of the tube, encapsulating the circuit board within the tube. While this method ensures a certain degree of product sealing, it also presents several problems. First, once the adhesive is applied, the maintainability of the product is significantly reduced. If repair of the circuit board is required, the CPAG tube must be cut to remove it, increasing repair difficulty and causing unnecessary waste. Second, the adhesive drying time increases assembly time and reduces production efficiency. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, according to embodiments of this disclosure, a waterproof structure for a cathodic protection data acquisition instrument is proposed, comprising:

[0006] The tube is closed at one end and open at the other end.

[0007] The circuit board is housed inside the tube.

[0008] Connecting wires to the circuit board;

[0009] A pipe cap is attached to the pipe body and closes the opening; the connecting wire passes through the pipe cap and exits the pipe body.

[0010] The cap has an external thread on the outer wall near the end of the pipe body, and the pipe body has an internal thread on the inner wall at the end with the opening, so that the cap can be threadedly connected to the pipe body through the fit between the external thread and the internal thread.

[0011] The space between the external and internal threads is filled with sealant. An overflow groove is provided on the inner wall of the tube body to allow the sealant to overflow into the overflow groove when the tube cap is screwed into the tube body and moved axially to the closed position.

[0012] In this technical solution, the structural design uses a threaded cap to seal the tube body. The threaded connection itself has a certain sealing performance, and the sealing effect can be further improved with the use of sealant. The cap is easy to disassemble, making it convenient to remove the circuit board for maintenance, reducing the difficulty of repair and eliminating unnecessary waste caused by cutting the tube body. When the internal and external threads are engaged, the sealant squeezed out flows into the overflow groove, preventing the sealant from seeping out of the outside of the tube body, and also forming a sealant-filled sealing structure, further improving the sealing effect. The tube body is open at only one end and closed at the other end, so only the open end of the tube body needs to be sealed, making sealing and waterproofing easy. After applying sealant to the cap and threading it into the tube body, the casing is assembled, eliminating the waiting time for the glue to dry during potting, shortening the finished product assembly time, and improving production efficiency.

[0013] In some embodiments, a limiting flange is provided on the outer wall of the cap, and the limiting flange surrounds the cap; when the cap is screwed in and moved to the closed position, the limiting flange abuts against the end face of the tube body.

[0014] In the technical solution, the structural design enables the limiting flange to restrict the movement of the cap towards the inside of the pipe body, preventing the cap from moving too far axially and completely entering the inside of the pipe body, thus preventing the cap from being difficult to remove from the pipe body; on the other hand, the limiting flange can also act as a sealing structure to seal the end of the pipe body, further improving the sealing effect of the cap on the pipe body.

[0015] In some embodiments, the overflow groove is located on the side of the internal thread near the opening.

[0016] In the technical solution, the structure design places the overflow groove on the side of the internal thread near the opening, allowing more sealant to overflow out of the tube body, preventing the sealant from seeping into the tube body and contaminating the circuit board, ensuring the circuit board surface is clean, and enabling the circuit board to operate stably for a long time; on the other hand, the overflow groove is close to the limiting flange, ensuring that the sealant overflowing outward is sealed into the tube body by the limiting flange, further reducing the possibility of sealant overflowing out of the tube body.

[0017] In some embodiments, a wiring cavity is provided inside the cap, and the wiring cavity extends through both ends of the cap;

[0018] A circuit adapter plate is installed at one end of the wiring cavity, which seals one end of the wiring cavity;

[0019] The connecting wire connects to the circuit adapter board and extends from the end of the wiring cavity away from the tube body to the outside of the tube cap;

[0020] The wiring cavity is filled with potting compound, and the circuit board is mounted on the circuit adapter board and electrically connected to it.

[0021] In the technical solution, the structural design provides space for the connecting wires to pass through, while the potting ensures the sealing of the cap and prevents water leakage caused by the wires. The circuit board is mounted on the circuit adapter board and the connecting wires are led out through the wiring cavity, making the wiring more organized, facilitating installation and maintenance, and reducing the risk of failure caused by messy wiring. The circuit board is connected to the cap, which allows the circuit board to be installed and removed along with the cap, making the operation more convenient.

[0022] In some embodiments, a rotating fixing plate is fixedly connected to the circuit adapter plate, and one end of the circuit board is fixedly connected to the rotating fixing plate; the rotating fixing plate is perpendicular to the circuit adapter plate, so that the circuit board is arranged along the axial direction of the tube body.

[0023] In the technical solution, the structural design uses a rotating fixing plate to fix the circuit board in the axial direction of the tube body, ensuring the accurate position of the circuit board inside the tube body and avoiding displacement of the circuit board due to vibration or external force, thereby ensuring the stable operation of the equipment. The design of the rotating fixing plate enhances the stability of the entire structure, making the connection between the circuit board and the tube body more secure and reducing problems such as poor contact caused by loose circuit board.

[0024] In some embodiments, a magnet is mounted on the rotating fixing plate, and the end of the magnet away from the rotating fixing plate is slidably connected to the inner wall of the tube body; a magnetic control switch is mounted on the inner wall of the tube body, and the magnetic control switch is electrically connected to the circuit board; when the tube cap is screwed in and moved to the closed position, the magnet and the magnetic control switch are axially opposite each other.

[0025] In the technical solution, the structural design uses the cooperation of magnets and magnetic switches to achieve automatic detection and indication of whether the pipe cap is tightened in place. Operators can intuitively judge whether the equipment is well sealed, which improves the reliability and safety of the equipment. On the other hand, the sliding limit effect of the magnet in the pipe can effectively support the circuit board, reduce the impact of vibration on the circuit board during transportation or operation, and further improve the stability and service life of the equipment.

[0026] In some embodiments, the rotating fixing plate is a metal plate, one end of which is attached to the grounding point of the circuit board; the other end of the rotating fixing plate is attached to the circuit adapter plate and connected to the grounding wire in the connecting wire.

[0027] In this technical solution, the structural design utilizes the conductivity of the rotating fixing plate to directly connect the grounding wire to the grounding point of the circuit board, simplifying the grounding structure, reducing the possibility of grounding failure, and improving the reliability of the equipment.

[0028] In some embodiments, a limiting mounting groove is formed at one end of the rotating fixing plate, and a connecting plug is installed in the limiting mounting groove; the connecting plug is electrically connected to the circuit adapter board via a cable, and both sides of the connecting plug are attached to the inner wall of the limiting mounting groove.

[0029] The circuit board is equipped with a connector socket, and the connector plug is plugged into the connector socket to electrically connect the circuit board to the circuit adapter board.

[0030] In the technical solution, the structural design enables quick connection and separation between the circuit board and the circuit adapter board by connecting the connector plug in the limiting mounting groove and the connector socket on the circuit board. This facilitates the assembly, debugging and maintenance of the equipment and improves production efficiency. On the other hand, the design of the connector plug fitting snugly against the inner wall of the limiting mounting groove can effectively prevent the connector plug from loosening or falling off. Furthermore, the plug-in connection enhances the stability of the circuit board, prevents the circuit board from loosening, and ensures reliable circuit connection during equipment operation.

[0031] In some embodiments, a sealing ring is fitted onto the cap, and the sealing ring contacts the inner wall of the pipe body; the sealing ring is located on the side of the external thread away from the pipe body.

[0032] In terms of technology, this structural design increases the number of sealing points, further improving the sealing reliability between the cap and the body and preventing moisture from seeping in from the connection between the cap and the body; on the other hand, the sealing ring can effectively prevent the sealing grease from seeping out of the body.

[0033] In some embodiments, the cap has a hexagonal cross-section at the end furthest from the opening.

[0034] In the technical solution, the structural design makes the cross-section of the end of the cap away from the opening hexagonal, so that it can better cooperate with tools such as wrenches, making it convenient for operators to use tools to tighten or loosen the cap, thus improving the installation and maintenance efficiency of the equipment.

[0035] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0037] Figure 1 This is a cross-sectional view of the waterproof structure of the cathode-protected data acquisition instrument of this utility model;

[0038] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0039] Figure 3 This is a schematic diagram of the waterproof structure of the cathode protection data acquisition instrument of this utility model after the tube body is hidden.

[0040] Figure 4 This is a schematic diagram of the tube body in the waterproof structure of the cathodic protection acquisition instrument of this utility model.

[0041] In the picture:

[0042] 1. Pipe body; 101. Opening; 102. Internal thread; 103. Overflow groove; 2. Circuit board; 201. Connecting socket; 3. Connecting wire; 4. Pipe cap; 401. External thread; 402. Limiting flange; 403. Wiring cavity; 5. Circuit adapter plate; 6. Rotating fixing plate; 601. Limiting mounting groove; 602. Connecting plug; 7. Magnet; 8. Magnetic switch; 9. Sealing ring. Detailed Implementation

[0043] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] like Figures 1 to 4 As shown in an illustrative embodiment of the waterproof structure of the cathodic protection data acquisition instrument of this utility model, the waterproof structure of the cathodic protection data acquisition instrument includes a tube body 1, a circuit board 2, a connecting wire 3, and a tube cap 4.

[0048] One end of the tube body 1 is closed, and the other end has an opening 101, making the tube body 1 a single-end open structure. A circuit board 2 is housed inside the tube body 1, and connecting wires 3 are connected to the circuit board 2. Connecting wires 3 include power supply wires, signal wires, and grounding wires. The circuit board 2 can be connected to a power source via the power supply wires, allowing the power source to supply power to the circuit board 2, enabling its operation. The circuit board 2 is electrically connected to a reference electrode and an underground metal structure via signal wires, enabling the circuit board 2 to measure the potential difference between the underground metal structure and the reference electrode. The circuit board 2 is grounded via a grounding wire, sending harmful current underground to prevent it from burning out. A cap 4 is connected to the tube body 1, closing the opening 101 at one end. Connecting wires 3 pass through the cap 4 and exit the tube body 1, connecting to the power source, reference electrode, underground metal structure, and other devices or structures requiring electrical connections to the circuit board 2.

[0049] The cap 4 has an external thread 401 on its outer wall near the end of the pipe body 1, and an internal thread 102 on its inner wall at the end of the pipe body 1 with the opening 101. Through the engagement of the external thread 401 and the internal thread 102, the cap 4 is screwed into the pipe body 1 and threadedly connected. As the cap 4 is screwed into the pipe body 1, it moves axially inward along the pipe body 1 until it reaches the closed position, where the internal thread 102 and the external thread 401 are fully engaged, and the cap 4 is in place. Sealing grease is filled between the external thread 401 and the internal thread 102 to ensure a tight seal. An overflow groove 103 is provided on the inner wall of the pipe body 1. Before the pipe cap 4 is screwed into the pipe body 1, sealant is applied to the external thread 401 on the pipe cap 4 or the internal thread 102 on the pipe body 1. When the pipe cap 4 is screwed into the pipe body 1 for threaded connection, as the threaded connection gradually tightens, the sealant between the internal and external threads 401 is squeezed and compacted. At the same time, the excess sealant overflows into the overflow groove 103 under the pressure and is contained by the overflow groove 103 to prevent the sealant from being squeezed out of the pipe body 1.

[0050] The cap 4 is connected to the sealed tube body 1 via a threaded connection. The threaded connection itself provides a certain degree of sealing, and the sealing effect is further improved when combined with sealant. The threaded connection makes it easy to disassemble the cap 4, thus facilitating the opening of the tube body 1 to install or remove the circuit board 2, reducing the difficulty of repairing the circuit board 2 without cutting the tube body 1. The overflow groove 103, which accommodates overflowing sealant, can form a separate seal, improving the sealing performance between the cap 4 and the tube body 1. The tube body 1 is open at only one end, while the other end is a closed structure, allowing the cap 4 to seal only one end of the tube body 1, making waterproof sealing easier. Simply screw the cap 4 into the tube body 1 to achieve a sealed installation, without waiting for the adhesive to dry, resulting in high assembly efficiency.

[0051] See also in this application. Figure 2 and Figure 3 A limiting flange 402 is provided on the outer wall of the cap 4, which surrounds the cap 4, making the limiting flange 402 annular. When the cap 4 is screwed into the tube body 1, the cap 4 moves axially to the closed position, and the limiting flange 402 abuts against the end face of the tube body 1, thereby preventing the cap 4 from moving further axially into the tube body 1 and limiting the cap 4 to the closed position.

[0052] If the cap 4 is fully inserted into the tube body 1, the cable protruding from the end face of the cap 4 will prevent operation, and the outer wall of the cap 4 will be completely concealed within the tube body 1. This would make it difficult to unscrew the cap 4 from the tube body 1. This structural design allows the limiting flange 402 to restrict the movement of the cap 4 towards the inside of the tube body 1, preventing excessive axial movement of the cap 4 and thus preventing difficulty in removing the cap 4 from the tube body 1. In addition, the limiting flange 402 is tightly fitted to the end face of the tube body 1, forming a seal on the end of the tube body 1, further improving the sealing effect of the cap 4 on the tube body 1.

[0053] See also in this application. Figure 2 The overflow groove 103 is located on the side of the internal thread 102 near the opening 101.

[0054] If sealant gets on the circuit board 2, its stickiness makes it prone to attracting dust, which can conduct electricity and cause a partial short circuit. Therefore, this structural design ensures that more sealant overflowing from the internal and external threads 401 flows out of the tube 1 and into the overflow groove 103, reducing the amount of sealant overflowing into the tube 1. This mitigates or even prevents sealant from contaminating the circuit board 2, keeping its surface clean and improving its operational stability. Furthermore, the overflow groove 103 is located near the limiting flange 402, ensuring that the overflowing sealant is contained within the tube 1 by the limiting flange 402, further reducing the possibility of sealant overflowing from the tube 1.

[0055] See also in this application. Figure 2The cap 4 has a wiring cavity 403 inside, with both ends of the wiring cavity 403 passing through both ends of the cap 4, thus making both ends of the cap 4 open. A circuit adapter plate 5 is installed at one end of the wiring cavity 403, which closes one end of the wiring cavity 403. A connecting wire 3 is connected to the circuit adapter plate 5 and extends from the end of the wiring cavity 403 away from the tube body 1 to the outside of the cap 4. The wiring cavity 403 is filled with potting compound, and the circuit board 2 is mounted on the circuit adapter plate 5 and electrically connected to it.

[0056] Since the connecting wire 3 passes through, the potting compound seals the wire passage, ensuring the sealing performance of the cap 4. In addition, the circuit board 2 is fixed to the cap 4 via the circuit adapter plate 5, so that it can be installed into or removed from the tube body 1 along with the cap 4, making the installation and removal of the circuit board 2 more convenient.

[0057] See also in this application. Figures 1 to 3 A rotating fixing plate 6 is fixedly connected to the circuit adapter plate 5, and one end of the circuit board 2 is fixedly connected to the rotating fixing plate 6. The rotating fixing plate 6 is perpendicular to the circuit adapter plate 5, so that the circuit board 2 is arranged along the axial direction of the tube body 1.

[0058] Because circuit board 2 has a relatively long length and is mounted on tube 1, circuit board 2 is fixed in the axial direction of tube 1 by a vertical rotating fixing piece 6. This achieves the positioning and installation of circuit board 2 within tube 1, preventing displacement of circuit board 2 due to vibration or external force, thereby ensuring stable operation of the equipment. In addition, the design of rotating fixing piece 6 enhances the stability of the entire structure, making the connection between circuit board 2 and tube 1 more secure and reducing problems such as poor contact caused by loose circuit board 2.

[0059] See also in this application. Figures 1 to 3 A magnet 7 is mounted on the rotating fixed plate 6, and the end of the magnet 7 away from the rotating fixed plate 6 is slidably connected to the inner wall of the tube body 1. A magnetic control switch 8 is mounted on the inner wall of the tube body 1, and the magnetic control switch 8 is electrically connected to the circuit board 2. When the tube cap 4 is screwed in and moved to the closed position, the magnet 7 and the magnetic control switch 8 are axially opposite each other.

[0060] During the process of screwing the cap 4 into the tube body 1, the outer end of the magnet 7 slides on the inner wall of the tube body 1. The magnet 7 supports the circuit board 2, keeping it axially aligned and preventing damage caused by friction between the circuit board 2 and the inner wall of the tube body 1. Furthermore, when the cap 4 moves to the closed position and is threaded into place, the magnet 7 approaches and aligns with the magnetic switch 8. The magnetic switch 8 senses the magnet 7, confirming that the cap 4 is properly installed. Only then does the circuit board 2 power on and operate. Alternatively, the operator can visually determine whether the equipment is properly sealed via an indicator light connected to the power supply, improving the reliability and safety of the equipment. The magnet 7 can also continuously support the circuit board 2 inside the tube body 1, reducing the impact of vibration on the circuit board 2 during transportation or operation, preventing the circuit board 2 from colliding with the tube body 1, and further improving the stability and service life of the equipment.

[0061] See also in this application. Figures 1 to 3 The rotating fixing plate 6 is a metal plate, with one end of it attached to the grounding point of the circuit board 2. The other end of the rotating fixing plate 6 is attached to the circuit adapter plate 5 and connected to the grounding wire in the connecting wire 3. Because the grounding point is attached to the metal rotating fixing plate 6, the circuit board 2 is electrically connected to the rotating fixing plate. Furthermore, the rotating fixing plate 6 is connected to the grounding wire, allowing the circuit board 2 to be grounded through the rotating fixing plate 6. This structural design utilizes the conductivity of the rotating fixing plate 6 to directly connect the grounding wire to the grounding point of the circuit board 2, simplifying the grounding structure, reducing the possibility of grounding failures, and improving the reliability of the equipment.

[0062] See also in this application. Figure 3 A limiting mounting groove 601 is formed at one end of the rotating fixing plate 6, and a connecting plug 602 is installed in the limiting mounting groove 601. The connecting plug 602 is electrically connected to the circuit adapter board 5 via a cable, and both sides of the connecting plug 602 are attached to the inner wall of the limiting mounting groove 601. A connecting socket 201 is installed on the circuit board 2, and the connecting plug 602 is inserted into the connecting socket 201 to electrically connect the circuit board 2 and the circuit adapter board 5. This structural design, through the insertion of the connecting plug 602 in the limiting mounting groove 601 into the connecting socket 201 on the circuit board 2, realizes the quick connection and separation between the circuit board 2 and the circuit adapter board 5, which facilitates the assembly, debugging and maintenance of the equipment and improves production efficiency. In addition, the limiting mounting groove 601 clamps and limits the connecting plug 602, and the connecting socket 201 fixed on the circuit board 2 is simultaneously plugged into the connecting plug 602, so that the limiting mounting groove 601 limits the circuit board 2 through the connecting plug 602 and the connecting socket 201, further improving the stability of the circuit board 2, preventing the circuit board 2 from loosening, and ensuring reliable circuit connection during equipment operation.

[0063] See also in this application. Figures 1 to 3A sealing ring 9 is fitted onto the cap 4, and the sealing ring 9 contacts the inner wall of the pipe body 1, thus sealing the gap between the outer wall of the cap 4 and the inner wall of the pipe body 1. The sealing ring 9 is located on the side of the external thread 401 away from the pipe body 1. This structural design increases the sealing point, further improving the sealing reliability between the cap 4 and the pipe body 1, and preventing moisture from seeping in from the connection between the cap 4 and the pipe body 1; on the other hand, the sealing ring 9 can effectively prevent the sealant from seeping out of the pipe body 1.

[0064] See also in this application. Figure 3 The cross-section of the end of the cap 4 furthest from the opening 101 is hexagonal. The hexagonal shape facilitates wrench operation, making it convenient for operators to tighten or loosen the cap 4, thus improving the efficiency of equipment installation and maintenance.

[0065] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A cathodic protection acquisition instrument waterproof structure, characterized in that, The utility model provides a kind of circuit board and the connection line of its connection line, including: Pipe body, one end of the pipe body is closed, the other end of the pipe body has opening; Circuit board is arranged in the pipe body; Connecting line, connecting the circuit board; Pipe cap is connected to the pipe body, and the opening is closed;The connecting line is arranged in the pipe cap, to be out of the pipe body; Wherein, the outer thread is arranged on the outer wall of the pipe cap close to one end of the pipe body, and the inner thread is arranged on the inner wall of the pipe body with the opening one end, to make the pipe cap be connected with the pipe body by the cooperation between the outer thread and the inner thread; The outer thread and the inner thread are filled with sealing grease, and the overflow groove is formed in the inner wall of the pipe body, to overflow the sealing grease into the overflow groove when the pipe cap is screwed into the pipe body and moves to the closed position axially.

2. The waterproof structure of the cathodic protection collector according to claim 1, characterized in that, The outer wall of the pipe cap is provided with a limiting flange, and the limiting flange surrounds the pipe cap;When the pipe cap is screwed in and moved to the closed position, the limiting flange abuts on the end surface of the pipe body.

3. The cathodic protection acquisition instrument waterproof structure of claim 2, wherein, The overflow groove is located on the side of the inner thread close to the opening.

4. The waterproof structure of the cathodic protection collector according to claim 1, characterized in that, The pipe cap is provided with a wiring cavity, and the wiring cavity penetrates through both ends of the pipe cap; One end of the wiring cavity is provided with a circuit adapter plate, and the circuit adapter plate closes one end of the wiring cavity; The connecting line is connected to the circuit adapter plate, and the connecting line is out of the wiring cavity away from the pipe body to the outside of the pipe cap; The wiring cavity is filled with potting glue, and the circuit board is arranged on the circuit adapter plate and electrically connected thereto.

5. The cathodic protection acquisition instrument waterproof structure of claim 4, wherein, The circuit adapter plate is fixedly connected with a rotating fixed piece, and one end of the circuit board is fixedly connected to the rotating fixed piece;The rotating fixed piece is perpendicular to the circuit adapter plate, so that the circuit board is arranged along the axial direction of the pipe body.

6. The cathodic protection acquisition instrument waterproof structure according to claim 5, wherein, The rotating fixed piece is provided with a magnet, and one end of the magnet away from the rotating fixed piece is slidably connected to the inner wall of the pipe body;The inner wall of the pipe body is provided with a magnetic control switch, and the magnetic control switch is electrically connected to the circuit board;When the pipe cap is screwed in and moved to the closed position, the magnet and the magnetic control switch are axially opposite.

7. The cathodic protection acquisition instrument waterproof structure of claim 5, wherein, The rotating fixed piece is a metal plate, one end of the rotating fixed piece is attached to the grounding point of the circuit board, and the other end of the rotating fixed piece is attached to the circuit adapter plate and connected to the grounding wire in the connecting line.

8. The cathodic protection acquisition instrument waterproof structure of claim 5, wherein, One end of the rotating fixed piece is provided with a limiting installation groove, and a connecting plug is installed in the limiting installation groove;The connecting plug and the circuit adapter plate are electrically connected through a cable, and the connecting plug is attached to the inner wall of the limiting installation groove on both sides; The circuit board is provided with a connecting socket, and the connecting plug is inserted into the connecting socket, so as to electrically connect the circuit board and the circuit adapter plate.

9. The waterproof structure of the cathodic protection acquisition instrument according to claim 1, characterized in that, The pipe cap is provided with a sealing ring, and the sealing ring is in contact with the inner wall of the pipe body;The sealing ring is located on the side of the outer thread away from the pipe body.

10. The waterproof structure of the cathodic protection acquisition instrument according to claim 1, characterized in that, The cross section of the end of the pipe cap away from the opening is hexagonal.

Images