Integrated waterproof eddy current sensor

Abstract

The utility model relates to an integrated waterproof eddy current sensor. The sensor comprises a probe shell, a probe base and a power signal line, the probe shell is a hollow structure with one end closed and the other end open, the probe base is connected to the open end of the probe shell, a coil framework, a coil, a shielding sheet and a PCB board are arranged in the probe shell, a coil groove is formed in the coil framework, the coil is wound on the coil groove of the coil framework, the shielding sheet and the PCB board are sequentially connected to the lower part of the coil framework, and the power signal line is introduced into the probe shell from the bottom of the probe base and connected with the PCB board. The utility model can solve the problem of narrow installation space caused by separation of the probe and the preamplifier, and the problem of waterproof failure of the preamplifier.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of eddy current sensor, concretely relates to an integrated waterproof eddy current sensor. BACKGROUND

[0002] Chinese patent CN201621017518.7 discloses an eddy current sensor, the sensor includes a probe, a preamplifier electrically connected with the probe, and a cable connecting the probe and the preamplifier, the probe includes a shell, a first nut and a second nut rotatably sleeved on the shell, the shell is a columnar shell, and the shell surface is provided with an external thread column screw-connected with the first nut and the second nut.

[0003] The patent is an eddy current sensor with a separated probe and preamplifier, which brings inconvenience to users during installation and occupies a large amount of installation space, and since the probe and the preamplifier need to be connected by an SMA plug, the SMA plug connection cannot be completely waterproof, which causes certain technical problems for some special use scenarios, and therefore, it is urgent to solve the existing problems. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the purpose of the utility model is to provide an integrated waterproof eddy current sensor to solve the technical problems of inconvenient sensor installation, too much space occupation, and incomplete waterproofness.

[0005] To achieve the above purpose, one of the utility models of an integrated eddy current sensor, the sensor includes a probe shell, a probe base and a power signal line, the probe shell is a hollow structure with one end closed and the other end open, and the probe base is connected to the open end of the probe shell; a coil skeleton, a coil, a shielding sheet and a PCB board are arranged in the probe shell, the coil skeleton is provided with a coil groove, the coil is wound on the coil groove of the coil skeleton, and the shielding sheet and the PCB board are sequentially connected to the lower part of the coil skeleton; the power signal line is introduced into the probe shell from the bottom of the probe base and connected with the PCB board.

[0006] The utility model is preferably: the probe shell is in the shape of a water cup, an external thread interface is arranged at the open end thereof, the upper part of the probe base is in the shape of a flange and is provided with an internal thread, the lower part of the probe base is a metal pipe provided with an external thread, and the inner part of the lower end of the metal pipe is provided with an internal thread; the probe shell is threadedly connected with the probe base; two nuts are threadedly sleeved outside the metal pipe, a waterproof joint is threadedly connected to the bottom of the metal pipe, the power signal line is introduced into the probe shell through the waterproof joint and welded on the PCB board.

[0007] The utility model discloses a better technical scheme: the coil framework is the conical structure of inside hollow, inverts in the probe shell, and its major end has seted up wire slot, and the bottom of little end has seted up 1 outlet hole and 4 fixed columns with wire, the fixed column is two long two short, and the coil is evenly wound in the coil framework wire slot with the enameled copper wire, and leads out two wires to pass the outlet hole of the coil framework top, and the shield piece has opened 5 small holes with the outlet hole of the coil framework top and 4 columns symmetry, and the small hole passes two long columns of the coil framework top and is fixed on two short columns, the PCB board is fixed on two long columns of the coil framework top, and the two copper wires of the coil lead are welded on the PCB board.

[0008] The utility model discloses a better technical scheme: the probe shell is integrally formed by injection molding, and is hollow, and the lower part is open and the outer surface is equipped with screw threads, and the coil framework is placed in the probe shell and is sealed and fixed by pouring glue.

[0009] The utility model discloses a better technical scheme: the flange seat of the probe base is integrally connected with the threaded metal pipe by injection molding.

[0010] The utility model discloses a better technical scheme: the waterproof joint has external threads at both ends, a wire pressing nut at the tail, and a rubber sealing sleeve inside, and the screw thread at the front end of the waterproof joint is screwed into the lower metal pipe of the probe base.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] (I) The utility model integrates the probe and the preamplifier together, saves the preamplifier shell and the probe coaxial cable, greatly reduces the cost, is more favorable to mass production, improves work efficiency, and at the same time, removes the coaxial cable, so that the instability of the electric eddy current caused by the long coaxial cable is eliminated.

[0013] (II) The utility model adopts an integrated design, integrates the PCB board in the probe, so that the whole sensor is only as large as the probe, and therefore, the customer can install and use more conveniently, and the installation space is saved to the maximum.

[0014] (III) The utility model optimizes the integrated structure and upgrades the material, so that the electric eddy current can be waterproof, oil-proof and corrosion-resistant, and can work in water for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of the utility model;

[0016] Figure 2 It is the assembly accessory diagram of the utility model.

[0017] In the figure: 1, probe shell; 2, coil framework; 3, coil; 4, shielding sheet; 5, PCB board; 6, probe base; 7, nut; 8, waterproof joint; 9, power signal line. DETAILED DESCRIPTION

[0018] In order to make the technical content, structural features, purposes and effects of the present application clear, the following examples are given with reference to the accompanying drawings.

[0019] In the description of the present application, it should be understood that the terms "center", "front", "back", "top", "bottom", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0020] The embodiment provides a kind of integrated waterproof eddy current sensor, as shown in Figure 1 And Figure 2 The sensor includes probe shell 1, probe base 6 and power signal line 9, the probe shell 1 is the hollow water cup shape of one end closed, the other end open, is equipped with external thread interface in its open end, the upper part of probe base 6 is flange shape and is equipped with internal thread, its lower part is metal pipe surface and is equipped with external thread, metal pipe lower end interior is equipped with internal thread, similar hollow screw rod structure;Probe shell 1 is connected with probe base 6 by screw thread, two nuts 7 are connected in the external thread of metal pipe, and waterproof joint 8 is connected with the bottom of metal pipe by screw thread.

[0021] The embodiment provides a kind of integrated waterproof eddy current sensor, as shown in Figure 1 And Figure 2 Coil framework 2, coil 3, shielding sheet 4 and PCB board 5 are arranged in probe shell 1, the coil framework 2 is equipped with coil slot, the coil framework 2 is the conical structure of internal hollow, is inverted in probe shell 1, is equipped with wire slot in large head end, is equipped with 1 outlet hole and 4 fixed columns in small head end bottom, the fixed column is long and short, the coil 3 is evenly wound in the coil framework wire slot by enameled copper wire, and two wires are led out and pass through the outlet hole in the top of the coil framework 2, the shielding sheet 4 is symmetric with the outlet hole in the top of the coil framework 2 and 4 columns on the small hole, the small hole passes through the two long columns in the top of the coil framework 2 and is fixed on the two short columns;PCB board 5 is fixed on the two long columns in the top of the coil framework 2, two copper wires led out by the coil are welded on PCB board 5, power signal line 9 is introduced into probe shell 1 from the bottom of probe base 6 through waterproof joint 8, and is welded on PCB board 5.

[0022] In the embodiment, the probe shell 1 is integrally formed by injection molding, is hollow inside, is open at the lower part, and is provided with threads on the outer surface, the coil framework 2 is arranged in the probe shell 1 and is fixed by pouring glue, the flange seat of the probe base 6 is integrally connected with the threaded metal pipe by injection molding, and the waterproof joint 8 is provided with external threads at both ends, a wire pressing nut at the tail, and a rubber sealing sleeve inside.

[0023] The installation of the integrated waterproof eddy current sensor in the embodiment specifically comprises the following steps, please refer to Figure 1 as shown in the drawings, and in combination with Figure 2 as shown in the drawings.

[0024] S1: Assembly of the coil framework 2, the coil 3 and the shielding sheet 4: first, the coil 3 is uniformly wound in the wire slot of the coil framework 2, the starting wire and the ending wire of the coil are passed through the wire outlet holes at the small end of the coil framework 2, then the four positioning holes on the shielding sheet 4 are aligned with the four positioning columns at the top of the coil framework, and the shielding sheet 4 is inserted and fixed tightly by glue, and at the same time, the two wire outlet heads of the coil are led out from the fifth hole in the center of the shielding sheet 4, and thus the coil framework assembly is installed.

[0025] S2: Installation and fixation between the probe shell 1 and the coil framework 2: the installed coil framework assembly is pressed into the probe shell 1, then the prepared pouring glue is injected into the probe shell 1 with the installed coil framework, after the pouring glue solidifies the probe shell and the coil framework together, the PCB board is fixed on the positioning columns at the top of the coil framework 2 by screws, and at the same time, the two copper wires led out of the coil 3 are welded on the PCB board.

[0026] S3: Assembly of the probe base 6: first, one end of the waterproof joint 8 is screwed into the metal pipe of the probe base 6, then the power signal wire 9 is passed through the probe base 6 with the installed waterproof joint 9, the power signal wire is welded on the fixed PCB board, finally, the probe base 6 is connected to the probe shell by threads, the prepared pouring glue is injected from the waterproof joint, and the wire pressing nut of the waterproof joint is locked, and thus the installation of the eddy current sensor is completed.

[0027] The integrated waterproof principle of the utility model: generally, the top and the bottom of the probe shell are hollow, the probe framework is directly pressed into the top of the probe shell and has a small gap, although the gap is sealed by glue, but such structure is prone to water seepage failure in harsh environment for a long time, by changing the structure of the probe shell 1, an integrally formed cover is added at the top of the probe shell 1, the probe framework 2 is pressed into the bottom of the probe shell, and is fixed by pouring glue, the integrally formed probe shell is connected with the base by threads, and finally the inside is filled and sealed by pouring glue, and the problem of seamless connection and complete waterproof is solved from the structure.

[0028] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. An integrated water-proof eddy current sensor, characterized by: The sensor comprises a probe shell (1), a probe base (6) and a power signal line (9), the probe shell (1) is a hollow structure with one end closed and the other end open, and the probe base (6) is connected to the open end of the probe shell (1); a coil framework (2), a coil (3), a shielding sheet (4) and a PCB board (5) are arranged in the probe shell (1), the coil framework (2) is provided with a coil groove, the coil (3) is wound on the coil groove of the coil framework (2), and the shielding sheet (4) and the PCB board (5) are sequentially connected to the lower part of the coil framework (2); the power signal line (9) is introduced into the probe shell (1) from the bottom of the probe base (6) and connected with the PCB board (5).

2. The integrated water-proof eddy current sensor according to claim 1, wherein: The probe shell (1) is in the shape of a water cup, and is provided with an external threaded interface at the open end; the upper part of the probe base (6) is in the shape of a flange and is provided with an internal thread, and the lower part of the probe base (6) is a metal pipe provided with an external thread, and the inner part of the lower end of the metal pipe is provided with an internal thread; the probe shell (1) is threadedly connected with the probe base (6); two nuts (7) are threadedly sleeved on the outside of the metal pipe, and a waterproof joint (8) is threadedly connected to the bottom of the metal pipe; the power signal line (9) is introduced into the probe shell (1) through the waterproof joint (8) and welded on the PCB board.

3. An integrated water-proof eddy current sensor according to claim 1 or 2, characterized in that: The coil framework (2) is a hollow conical structure, inverted in the probe shell (1), and is provided with a wire slot at the large end, and an outlet hole and four fixing columns at the bottom of the small end; the two long fixing columns are longer than the two short fixing columns; the coil (3) is a varnished copper wire uniformly wound in the wire slot of the coil framework (2), and two copper wires are introduced out of the outlet hole at the top of the coil framework (2); the shielding sheet (4) is provided with five small holes symmetrically with the outlet hole at the top of the coil framework (2) and the four columns, and the small holes pass through the two long columns at the top of the coil framework (2) and are fixed on the two short columns; the PCB board (5) is fixed on the two long columns at the top of the coil framework (2), and the two copper wires introduced out of the coil are welded on the PCB board (5).

4. The integrated water-proof eddy current sensor according to claim 1 or 2, wherein: The probe shell (1) is integrally formed by injection molding, is hollow, is open at the lower part and is provided with threads on the outer surface; the coil framework (2) is arranged in the probe shell (1) and is fixed by glue sealing.

5. The integrated water-proof eddy current sensor according to claim 2, wherein: The flange seat of the probe base (6) and the threaded metal pipe are integrally fixed and connected by injection molding.

6. The integrated water-proof eddy current sensor according to claim 2, wherein: The waterproof joint (8) is provided with external threads at both ends, a wire pressing nut at the tail, and a rubber sealing sleeve inside; the front end of the waterproof joint is screwed into the lower metal pipe of the probe base (6).

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