CN220170933U

CN220170933U - Coupled electrode array probe

Info

Publication number: CN220170933U
Application number: CN202321234979.XU
Authority: CN
Inventors: 孔德生; 孙勤; 李长安; 高桂飞; 万更尧
Original assignee: Qingdao Yahe Science & Tech Development Co ltd
Current assignee: Qingdao Yahe Science & Tech Development Co ltd
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-12-12
Anticipated expiration: 2033-05-19

Abstract

A coupling electrode array probe comprises a shell, a connector, a supporting component, an electrode and a potting material; the bottom end of the shell is provided with a port; the connector is arranged in the shell, and the top end of the connector penetrates through an assembly hole formed in the top end of the shell; the support assembly comprises a PCB, a positioning plate and a support column, wherein the PCB and the positioning plate are both arranged on the support column, and a terminal arranged at the bottom end of the connector is welded with the PCB; the electrodes penetrate through the positioning plate and the PCB and are connected with the PCB in a welding way, the terminals are electrically connected with the corresponding electrodes through the PCB, the electrodes are parallel to each other, and the bottom ends of the electrodes are aligned on the same plane; the potting material is filled in the housing with its bottom end face flush with the bottom end of the electrode. In the embodiment of the utility model, the electrodes are positioned and fixed through the PCB and the positioning plate, so that all the electrodes are kept stable and orderly arranged, the measurement accuracy of the probe is ensured, the electrodes and the connector are connected with the PCB through welding, the electrodes are electrically connected with the connector through wires in the PCB, and the wiring operation is simple and the reliability is high.

Description

Coupled electrode array probe

Technical Field

The utility model belongs to the technical field of metal corrosion protection, and particularly relates to a coupling electrode array probe.

Background

The coupling electrode array is one of corrosion rate measuring technology, especially effective technology for measuring pitting corrosion rate, and the coupling electrode array probe for measuring consists of several mutually insulated electrodes arranged according to certain requirement.

The coupling electrode array probe for current monitoring mainly has several defects:

(1) When the electrodes are packaged, a plurality of slender electrodes are difficult to ensure electrode arrangement according to requirements, and the interpretation of final data is affected;

(2) The electrodes and the connectors need to be connected by leads, and the reliability of electrode wiring is difficult to ensure due to the large number of the electrodes;

(3) The manual operation of the arrangement and wiring of a plurality of electrodes has low production efficiency and difficult quality control, so that the consistency of the processing of the coupling electrode array probe is difficult to ensure during mass production, and the requirements of industrial application cannot be met.

Disclosure of Invention

Aiming at the defects existing in the related art, the utility model provides a coupling electrode array probe to solve the technical problems of irregular electrode arrangement, poor wire connection reliability and high production difficulty of the conventional coupling electrode array probe.

The utility model provides a coupling electrode array probe, comprising:

a housing having a port at a bottom end thereof;

the connector is arranged in the shell, the top end of the connector is provided with a socket, and the connector penetrates through an assembly hole formed in the top end of the shell;

the support assembly comprises a PCB, a positioning plate and a support column, wherein the PCB and the positioning plate are arranged on the support column, and a terminal arranged at the bottom end of the connector is welded with the PCB;

the plurality of electrodes are needle-shaped, sequentially penetrate through the positioning plate and the PCB from bottom to top and are connected with the PCB in a welded mode, the plurality of terminals are electrically connected with the corresponding electrodes through the PCB, the plurality of electrodes are parallel to each other, and the bottom ends of the electrodes are aligned on the same plane;

and the potting material is filled in the shell, and the end face of the bottom end of the potting material is flush with the bottom end of the electrode.

In some of these embodiments, the support assembly further comprises a solder pin, the PCB board comprising a first PCB board and a second PCB board;

the first PCB board is located the second PCB board top, terminal and first PCB board welded connection, and first PCB board and second PCB board are worn to establish to welded connection with it to the welding needle has a plurality ofly, and the terminal all is connected with corresponding electrode electricity through corresponding welding needle.

In some of these embodiments, the support column comprises a column comprising a first column and a second column;

an upper stud arranged at the top end of the first column body penetrates through the first PCB and is in threaded connection with an upper limit nut pressed on the first PCB;

the bottom end of the first column body is connected with the top end of the second column body through a connecting stud, the connecting stud penetrates through the second PCB, and at least one of the first column body and the second column body is in threaded connection with the connecting stud, so that the first column body and the second column body clamp the second PCB;

the lower stud arranged at the bottom end of the second post penetrates through the positioning plate and is in threaded connection with a lower limit nut pressed on the positioning plate.

In some of these embodiments, the PCB and the locating plate are each provided with an air vent.

In some of these embodiments, the number of vent holes on the PCB board is the same as the number of vent holes on the locating plate, and the two are vertically aligned.

In some of these embodiments, the sidewalls of the electrode bottom are coated with an insulating layer.

In some of these embodiments, the portion of the electrode between the locating plate and the upper adjacent PCB plate is 50% to 80% of the length of the electrode.

In some of these embodiments, the locating plate and support posts are insulators.

In some of these embodiments, the bottom end of the electrode and the end face of the bottom end of the potting material are flush with the port of the housing.

In some of these embodiments, the top of the connector is sleeved with a sealing ring and a fastening nut, the sealing ring falls on a step provided on the side wall of the connector, and the fastening nut is in threaded connection with the connector and is pressed against the top surface of the housing, so that the step presses the sealing ring against the inner wall of the housing.

Based on the technical scheme, the electrodes are positioned and fixed through the PCB and the positioning plate, so that all the electrodes are kept stable and arranged neatly, the measurement accuracy of the probe is guaranteed, the electrodes and the connector are connected with the PCB through welding, the electrodes are electrically connected with the connector through wires inside the PCB, the wiring operation is simple, the reliability is high, and the technical problems that the current coupling electrode array probe is not orderly in electrode arrangement, poor in wire connection reliability and high in production difficulty are solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic illustration of a coupling electrode array probe housing of the present utility model in a cut-away configuration;

FIG. 2 is a schematic diagram of a connector and support assembly combination for a coupling electrode array probe according to the present utility model;

FIG. 3 is a schematic diagram of a first PCB in the coupling electrode array probe of the present utility model;

FIG. 4 is a schematic diagram of a second PCB in the coupling electrode array probe of the present utility model;

FIG. 5 is a schematic diagram of a positioning plate in a coupling electrode array probe according to the present utility model;

in the figure:

1. a housing; 11. a port; 12. a fitting hole;

2. a connector; 21. a socket; 22. a terminal; 23. a step;

3. a support assembly; 31. a PCB board; 31A, a first PCB board; 31B, a second PCB board; 32. a positioning plate; 33. a support column; 331. a first column; 332. a second column; 333. an upper limit nut; 334. a lower limit nut; 34. a bonding pad; 35. positioning holes; 36. a welding needle; 37. an exhaust hole;

4. an electrode; 5. encapsulating material; 6. a seal ring; 7. and (5) fastening the nut.

Detailed Description

The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 5, in one exemplary embodiment of the coupling electrode array probe of the present utility model, the coupling electrode array probe includes a housing 1, a connector 2, a support assembly 3, an electrode 4, and a potting material 5.

The bottom end of the housing 1 has a port 11, and the connector 2 is mounted in the housing 1. The connector 2 has a socket 21 at the top end and a terminal 22 at the bottom end. The top end of the shell 1 is provided with an assembly hole 12, and the socket 21 upwards penetrates out of the shell 1 through the assembly hole 12. The support assembly 3 comprises a PCB 31, a positioning plate 32 and a supporting column 33, wherein the PCB 31 and the positioning plate 32 are fixed on the supporting column 33, the PCB 31 is positioned above the positioning plate 32, and the terminals 22 of the connector 2 are connected with the PCB 31 in a welded mode, so that the support assembly 3 is hung on the connector 2. The needle-shaped electrodes 4 are arranged in a plurality, and the electrodes 4 penetrate through the positioning plate 32 and the PCB 31 and are connected with the PCB 31 in a welding way. The electrodes 4 are parallel to each other and the bottom ends are aligned on the same plane. The housing 1 is filled with the potting material 5, and the end face of the bottom end of the potting material 5 is flush with the bottom end of the electrode 4. After the potting material 5 is set, the electrode 4 and the support assembly 3 are fixed in the housing 1.

The electrode 4 is inserted through the pad 34 of the PCB 31 and soldered by solder, and the terminal 22 of the connector 2 is soldered to the pad 34 of the PCB 31 by solder, so that the terminal 22 of the connector 2 is electrically connected to the electrode 4 through a wire inside the PCB 31. The connector 2 has a plurality of terminals 22, each terminal 22 is electrically connected with a corresponding electrode 4 through a corresponding wire in the PCB board 31, and the electrical connection between the connector 2 and each electrode 4 is realized, so that after the socket 21 of the connector 2 is inserted into the plug of the cable, the electrode 4 is connected with the upper detection device, and corrosion detection is performed.

The electrode 4 is penetrated through the bonding pads 34 of the PCB 31 and the positioning holes 35 of the positioning plate 32, the number of the bonding pads 34 and the number of the positioning holes 35 are the same as the number of the electrodes 4, and the arrangement mode of the bonding pads 34 on the PCB 31 and the arrangement mode of the positioning holes 35 on the positioning plate 32 are completely the same, so that after the corresponding bonding pads 34 and the positioning holes 35 are penetrated through each electrode 4, the arrangement of the electrodes 4 and the arrangement of the positioning holes 35 are kept consistent, all the electrodes 4 are in a mutually parallel state, the electrodes 4 are further arranged according to a set arrangement mode, the difference of the intervals between the adjacent electrodes 4 caused by irregular arrangement is avoided, the interpretation of final data is influenced, and inaccurate measurement is caused.

The bottom ends of the electrodes 4 are aligned, the potting material 5 is filled into the bottom ends of the electrodes 4 and is flush with the bottom ends, so that only the end surfaces of the bottom ends of the electrodes 4 are exposed on the end surfaces of the potting material 5, the side walls of the electrodes 4 are all covered by the potting material 5, when the probe contacts the solution, only the end surfaces of the bottom ends of the electrodes 4 are contacted with the solution, and as the contact area of the electrodes 4 and the solution is related to electrode corrosion current, the electrodes 4 are only the end surfaces of the bottom ends are contacted with the solution, electrode corrosion current measurement outgoing line deviation is avoided, and accuracy is ensured.

The material that the PCB board 31 plate body used is insulating, and the wire is in the inside of PCB board 31, does not expose, just switches on with electrode 4 through pad 34, and the encapsulating material 5 is insulating material, and locating plate 32 is insulating with the contact position of electrode 4, or locating plate 32 directly adopts the insulating part, can not switch on each other through PCB board 31, locating plate 32 or encapsulating material 5 between each electrode 4, guarantees the uniqueness that each terminal 22 of connector 2 and electrode 4 electricity are connected.

In the above-mentioned exemplary embodiment, the connectors and electrodes in the coupling electrode array probe are all welded on the PCB board by soldering tin, and the one-to-one connection between the connector terminals and the electrodes is realized by each wire inside the PCB board, and by arranging the bonding pads at the corresponding positions on the PCB board, each terminal and each electrode are inserted into the corresponding bonding pad and soldered by soldering tin, all the electrical connections can be completed, the operation of wiring is simple, the soldering connection is firm, the wires can be kept stable inside the PCB board, and the reliability of electrical connection is strong; the PCB is worn on the upper portion of the electrode, the locating plate is worn on the lower portion of the electrode, the electrodes are supported through the two plates, so that the installed electrodes are kept stable, as the electrodes are parallel to each other, the arrangement modes of the holes in the PCB and the holes in the locating plate are completely consistent, and the electrodes are completely aligned in the up-down direction, the electrodes are worn in the holes aligned up-down, the assembly of the electrodes, the PCB and the locating plate can be completed, the installation is convenient, after the electrodes are welded, the electrodes are arranged according to the arrangement modes of the holes in the PCB and the locating plate, the accuracy of the arrangement of the electrodes is ensured, the influence on final data interpretation is avoided, the measurement accuracy is improved, and the technical problems of irregular arrangement of the electrodes of the current coupling electrode array probe, poor connection reliability of the wires and high production difficulty are solved.

In some embodiments, the support assembly 3 further includes a solder pin 36, and the PCB board 31 includes a first PCB board 31A and a second PCB board 31B.

The first PCB 31A is located above the second PCB 31B, and each terminal 22 is soldered to each corresponding pad 34 of the first PCB 31A. The top ends of the solder pins 36 are respectively penetrated through the corresponding solder pads 34 of the first PCB 31A and are connected by soldering, so that each terminal 22 can be electrically connected with a corresponding solder pin 36 through a corresponding wire in the first PCB 31A. The bottom ends of the welding pins 36 are respectively penetrated through the corresponding welding pads 34 of the second PCB 31B and are connected through soldering tin, the electrodes 4 are respectively penetrated through one corresponding welding pad 34 of the second PCB 31B and are connected through soldering tin, so that the welding pins 36 can be electrically connected with the corresponding electrode 4 through one corresponding wire in the second PCB 31B, and finally, the one-to-one correspondence of the electric connection of the terminals 22 of the connector 2 and the electrodes 4 is realized.

Because of the structural characteristics of the connector 2, the terminals 22 are generally concentrated at the central position, if the terminals 22 and the electrodes 4 are welded on the same PCB board, the terminals 22 occupy the central area of the PCB board, the electrodes 4 cannot be arranged in the central area of the PCB board, and the electrodes 4 can only be arranged in the cylindrical area in the housing 1, so that a compact electrode arrangement mode cannot be formed. The terminal 22 of the connector 2 is electrically connected with the electrode 4 through two PCB boards, the two PCB boards are electrically connected through the welding pin 36, the welding pin 36 is smaller and can be distributed in a scattered manner, the partial area of the second PCB board 31B cannot be occupied in a concentrated manner, the electrode 4 can be welded at each position on the second PCB board 31B, the electrode 4 can be arranged in a whole-surface compact manner, and corresponding measurement requirements are met.

In some embodiments, support column 33 comprises a column comprising a first column 331 and a second column 332.

The upper stud arranged at the top end of the first column 331 penetrates through the first PCB 31A, is in threaded connection with an upper limit nut 333, and is screwed to press the upper limit nut 333 on the first PCB 31A, so that the upper limit nut 333 and the first column 331 clamp and fix the first PCB 31A, and the first PCB 31A is fixedly connected with the support column.

The bottom of first cylinder 331 passes through the connecting stud and links to each other with the top of second cylinder 332, and the second PCB board 31B is worn to establish by the connecting stud, and at least one and connecting stud threaded connection in first cylinder 331 and the second cylinder 332, rotatory first cylinder 331 or second cylinder 332, more screw in the cylinder with the connecting stud, reduce the interval between two cylinders, make first cylinder 331 and second cylinder 332 with second PCB board 31B centre gripping fixed, realize the fixed connection of second PCB board 31B and support column.

The lower stud arranged at the bottom end of the second post 332 penetrates through the positioning plate 32, is in threaded connection with a lower limit nut 334, and is screwed to press the lower limit nut 334 on the positioning plate 32, so that the lower limit nut 334 and the second post 332 clamp and fix the positioning plate 32, and the positioning plate 32 is fixedly connected with the support column.

The support column 33 adopts a multisection structure and nuts to realize the clamping fixation of each plate, has a simple structure, does not need to be provided with a fixed part independently, and has strong use flexibility according to the number of layers of the required fixed plate.

In some embodiments, the PCB 31 and the positioning plate 32 are each provided with an air vent 37. In the process of filling the potting material 5 into the casing 1, the gas in the casing 1 is gradually discharged through the port 11, the gas can pass through the PCB 31 and the positioning plate 32 through the gas exhaust holes 37, more bubbles are prevented from remaining in the potting material 5, the structural strength of the potting material 5 is prevented from being reduced, the bubbles are prevented from being stuck on the PCB 31 or the positioning plate 32, the bonding degree of the potting material 5 and the PCB 31 or the positioning plate 32 is reduced, and the potting material 5 is firmly supported.

In some embodiments, the number of vent holes 37 on the PCB board 31 is the same as the number of vent holes 37 on the positioning board 32, and the two are vertically aligned. Because the exhaust holes 37 of the two layers of plates are aligned, in the encapsulation process, after the air bubbles pass through the exhaust holes 37 of the PCB 31, the air bubbles can directly float to the exhaust holes 37 of the positioning plate 32, and then pass through the positioning plate 32, so that the exhaust difficulty is increased by avoiding staggered arrangement of the exhaust holes 37, the air in the shell 1 is exhausted to a greater extent, and the compactness of the encapsulated material after qualitative property is ensured.

In some embodiments, the side wall of the bottom of the electrode 4 is coated with an insulating layer, after the electrode 4 is corroded and shortened due to long-time use, the end part of the electrode 4 can shrink into the cylindrical insulating layer, and the side wall of the electrode 4 is always coated by the insulating layer, so that only the end face of the electrode 4 is ensured to be contacted with the solution, the corrosion current measurement outgoing line deviation of the electrode 4 is avoided, and the accuracy is ensured.

In some embodiments, the portion of the electrode 4 between the positioning plate 32 and the upper adjacent PCB plate 31 is 50% to 80% of the electrode length. When the PCB 31 is provided with only one, the distance between the positioning plate 31 and the PCB 31 is more than or equal to half of the length of the electrode 4 and less than or equal to 80% of the length of the electrode; when the PCB 31 comprises a first PCB 31A and a second PCB 31B, the distance between the positioning plate 32 and the second PCB 31B is greater than or equal to half of the length of the electrode 4 and less than or equal to 80% of the length of the electrode, so that the stability of the positioning plate 32 and the PCB 31 in supporting the electrode 4 is ensured, and meanwhile, the top end of the electrode 4 can penetrate through the PCB 31 and be welded with the electrode.

In some embodiments, the positioning plate 32 and the support columns 33 are insulating members, so that conduction between the electrodes through the positioning plate 32 and the support columns 33 is avoided, and the uniqueness of the electrical connection between each electrode 4 and the terminal 22 of the connector 2 is ensured.

In some embodiments, the bottom end of the electrode 4 and the end face of the bottom end of the potting material 5 are flush with the port 11 of the housing 1. After filling the potting material 5, the port may be protruded, after shaping the potting material 5, the protruded part of the potting material 5 can be polished directly, and the port 11 is polished to be flush, so that the end face of the electrode 4 is exposed and flush with the end face of the potting material 5, and the processing difficulty is reduced while only the end face of the electrode 5 is exposed.

In some embodiments, the top of the connector 2 is sleeved with the sealing ring 6 and the fastening nut 7, the sealing ring 6 falls on the step 23 arranged on the side wall of the connector 2, the fastening nut 7 is in threaded connection with the connector 2, the fastening nut 7 is screwed to be pressed on the top surface of the shell 1, the step 23 is used for pressing the sealing ring 6 on the inner wall of the shell 1, the assembly and the fixation of the connector 2 are realized, the tightness of the assembly hole 12 after the connector 2 is installed is ensured, and the potting material 5 is prevented from flowing out of the assembly hole 12.

Finally, it should be noted that: in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.

Claims

1. A coupled electrode array probe, comprising:

a housing having a port at a bottom end thereof;

the support assembly comprises a PCB, a positioning plate and a support column, wherein the PCB and the positioning plate are arranged on the support column, and a terminal arranged at the bottom end of the connector is connected with the PCB in a welding way;

2. The coupled electrode array probe of claim 1, wherein the support assembly further comprises a solder pin, the PCB board comprising a first PCB board and a second PCB board;

the first PCB is located above the second PCB, the terminal is connected with the first PCB in a welded mode, the welding needle penetrates through the first PCB and the second PCB and is connected with the second PCB in a welded mode, the welding needle is multiple, and the terminal is electrically connected with the electrode through the corresponding welding needle.

3. The coupled electrode array probe of claim 2, wherein the support column comprises a column comprising a first column and a second column;

an upper stud arranged at the top end of the first column penetrates through the first PCB and is in threaded connection with an upper limit nut pressed on the first PCB;

the bottom end of the first column body is connected with the top end of the second column body through a connecting stud, the connecting stud penetrates through the second PCB, and at least one of the first column body and the second column body is in threaded connection with the connecting stud, so that the second PCB is clamped by the first column body and the second column body;

the lower stud arranged at the bottom end of the second cylinder penetrates through the positioning plate, and is in threaded connection with a lower limit nut pressed on the positioning plate.

4. The coupled electrode array probe of claim 1, wherein the PCB and the positioning plate are each provided with an exhaust hole.

5. The coupled electrode array probe of claim 4, wherein the number of vent holes on the PCB is the same as the number of vent holes on the locating plate and the two are vertically aligned.

6. The coupled electrode array probe of claim 1, wherein the sidewall of the electrode bottom is coated with an insulating layer.

7. The coupled electrode array probe of claim 1, wherein the portion of the electrode between the locating plate and the upper adjacent PCB plate is 50% to 80% of the length of the electrode.

8. The coupled electrode array probe of claim 1, wherein the locating plate and the support column are insulators.

9. The coupled electrode array probe of claim 1, wherein the bottom end of the electrode and the end face of the bottom end of the potting material are flush with the port of the housing.

10. The coupling electrode array probe of claim 1, wherein the connector top is sleeved with a sealing ring and a fastening nut, the sealing ring is dropped on a step provided on the side wall of the connector, and the fastening nut is in threaded connection with the connector and is pressed on the top surface of the housing, so that the step presses the sealing ring on the inner wall of the housing.