CN211477062U - Measuring head of coating thickness gauge - Google Patents
Measuring head of coating thickness gauge Download PDFInfo
- Publication number
- CN211477062U CN211477062U CN202020198868.8U CN202020198868U CN211477062U CN 211477062 U CN211477062 U CN 211477062U CN 202020198868 U CN202020198868 U CN 202020198868U CN 211477062 U CN211477062 U CN 211477062U
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- Prior art keywords
- circuit board
- coating thickness
- mounting cavity
- handle
- wall
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- 239000011248 coating agent Substances 0.000 title claims abstract description 56
- 238000000576 coating method Methods 0.000 title claims abstract description 56
- 238000005259 measurement Methods 0.000 claims abstract description 20
- 239000000523 sample Substances 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 3
- 238000009675 coating thickness measurement Methods 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
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Abstract
The utility model provides a coating thickness gauge head relates to the thickness measurement instrument field, and this coating thickness gauge head includes: the measuring head body is cylindrical and is provided with a first mounting cavity which is formed along the axial direction of the measuring head body, one end of the first mounting cavity is provided with an opening, and a measuring assembly for measuring the thickness of the coating is arranged at the opening; the handle is cylindrical and fixedly connected to the outer side wall of the measuring head body, a second mounting cavity is formed in the handle, a circuit board is arranged in the second mounting cavity, and the circuit board is electrically connected with the measuring assembly through an electric wire. The utility model provides a coating thickness gauge head has the coating thickness measurement of small and exquisite appearance in order to satisfy pore wall and narrow groove wall in the minor diameter.
Description
Technical Field
The utility model relates to a thickness measurement instrument field, in particular to coating thickness gauge head of high accuracy multipurpose.
Background
The coating thickness gauge can nondestructively measure the thickness of the non-magnetic coating on the magnetic metal substrate and the thickness of the non-conductive coating on the non-magnetic metal substrate, has the advantages of small measurement error, high reliability, good stability, simple and convenient operation and the like, and is widely applied to the detection fields of manufacturing industry, metal processing industry, chemical industry and the like. The measuring head (probe) of the coating thickness gauge is the most important part of the coating thickness gauge, and the measuring efficiency and the measuring precision are influenced.
The principle of measuring the magnetic matrix is that a coil generates a magnetic field under the action of alternating current, when the coil approaches to the vicinity of the magnetic matrix, the magnetic field generated by the coil and the magnetic matrix form a closed-loop magnetic circuit, the distance between the coil and the magnetic matrix is changed to change the gap in the magnetic circuit, the change of the gap influences the change of the impedance of the coil, the impedance is a function of the measured gap, the value of the gap is calculated by measuring the change of the impedance, and the value of the gap is the thickness value to be measured; the principle of measuring the non-magnetic substrate is that after high-frequency alternating current passes through a coil, when the coil is close to a non-magnetic conductor, a magnetic field generated by the coil can generate eddy current on the surface of the conductor, the eddy current on the conductor can generate a magnetic field opposite to the magnetic field of the coil, the magnetic field has a counteraction effect on the magnetic field generated by the coil, so that the inductance, the impedance and the quality factor of the coil are changed, and the measured coating thickness is obtained by measuring the change and calculating.
Specifically, as shown in fig. 1, the conventional small-range probe generally includes a positioning terminal, a coil bobbin, a magnetic core, a circuit board, an outer sliding sleeve, a cable sleeve, and a tail sleeve. Because the outer sliding sleeve, the cable sleeve and the tail sleeve are sequentially connected, the structure is long, and the total length of the general measuring head is over 65mm, so that the measuring head can only be used for measuring a plane, a convex surface and an open concave surface, and is not suitable for a pipe wall with the diameter less than 65mm and a narrow groove with the diameter less than 65 mm. The large-range measuring head is also large in volume and is not suitable for measuring the inner wall of a small-diameter pipe and the side wall of a narrow groove.
In view of the above, the inventor designs a coating thickness gauge measuring head through repeated experiments according to production design experiences of the field and related fields for many years, so as to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a coating thickness gauge head has the coating thickness measurement of small and exquisite appearance in order to satisfy minor diameter inner bore wall and narrow groove wall.
In order to achieve the above object, the utility model provides a coating thickness gauge head, wherein, the coating thickness gauge head includes:
the measuring head body is cylindrical and is provided with a first mounting cavity which is formed along the axial direction of the measuring head body, one end of the first mounting cavity is provided with an opening, and a measuring assembly for measuring the thickness of a coating is arranged at the opening;
the handle is cylindrical and fixedly connected to the outer side wall of the measuring head body, a second mounting cavity is formed in the handle, a circuit board is arranged in the second mounting cavity, and the circuit board is electrically connected with the measuring assembly through an electric wire.
The measuring head of the coating thickness gauge comprises a measuring head body, a handle and a first mounting cavity, wherein the measuring head body is provided with a side wall, the side wall is provided with a mounting through hole, one end of the handle is inserted into the mounting through hole, and the second mounting cavity is arranged along the axial direction of the handle and is communicated with the first mounting cavity.
The measuring head of the coating thickness gauge, wherein the outer wall of the handle is in interference fit with the inner wall of the mounting through hole.
The measurement head of the coating thickness gauge, wherein the outer wall of the handle and the inner wall of the mounting through hole are connected by bonding.
The measurement head of the coating thickness gauge, wherein the circuit board is arranged along the axial direction of the second mounting cavity and has a gap with the inner wall of the second mounting cavity.
The measuring head of the coating thickness gauge comprises a circuit board support, wherein the circuit board support is arranged at two ends of the circuit board, the circuit board support is cylindrical, the outer edge of the circuit board support is fixedly connected with the inner wall of the second mounting cavity, a mounting groove matched with the circuit board in an aligning way is formed in the inner edge of the circuit board support, and the circuit board is inserted into the mounting groove.
The probe of the coating thickness gauge, wherein the circuit board support is an insulating circuit board support, and the circuit board support is provided with a communication hole for allowing an electric wire to pass through.
The measuring head of the coating thickness gauge comprises a circuit board, a handle and a circuit board, wherein the circuit board is connected with the handle, and the circuit board is connected with the circuit board.
The measuring head of the coating thickness gauge comprises a measuring component, a positioning terminal, a measuring component and a measuring head, wherein the measuring component is arranged at the opening through the positioning terminal, the positioning terminal is cylindrical, one end of the positioning terminal is inserted into the opening, the other end of the positioning terminal protrudes out of the opening, the measuring component is fixedly arranged in the positioning terminal, and a plurality of V-shaped grooves are formed in the outer edge of the positioning terminal protruding out of the end face of the opening.
The coating thickness gauge measuring head as described above, wherein an elastic buffer element is further disposed between the measuring assembly and the inner wall of the first mounting cavity.
Compared with the prior art, the utility model has the following characteristics and advantages:
the utility model provides a coating thickness gauge measuring head includes gauge head body and handle two parts to place the circuit board in the handle, only need install measuring unit in the gauge head body can, reduced the volume of gauge head body greatly, make the gauge head body more small and exquisite; simultaneously, because the handle sets firmly in one side of gauge head body, like this, when carrying out the coating thickness measurement to the coating of minor diameter pipe wall, the coating of narrow groove inner wall, only need make its axial length of gauge head body await measuring internal aperture, narrow groove internal diameter can, need not to consider the length of handle, can be so that the application scene of coating thickness gauge head is abundanter.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.
Fig. 1 is a schematic structural view of a measuring head of a coating thickness gauge provided by the present invention;
fig. 2 is a schematic structural view of the circuit board support of the present invention;
fig. 3 is a schematic structural view of a positioning terminal of the present invention;
fig. 4 is a schematic view of the measuring head of the coating thickness gauge measuring pipe provided by the utility model measuring the inner wall of the round pipe;
fig. 5 is a schematic diagram of the measuring head of the coating thickness gauge for measuring the inner wall of the narrow groove;
fig. 6 is a schematic structural diagram of the middle measuring assembly of the present invention.
Description of reference numerals:
100. a coating thickness gauge measuring head; 10. A probe body;
11. a first mounting cavity; 20. A handle;
21. a second mounting cavity; 30. A measurement assembly;
31. a probe; 32. 33, 37, a magnetic core;
34. a coil bobbin; 35. A primary coil;
36. a secondary coil; 40. A circuit board;
50. an electric wire; 60. A circuit board holder;
61. a communicating hole; 70. A cable;
71. a cable snap ring; 72. A cable cover;
80. a positioning terminal; 81. A V-shaped groove;
90. an elastic buffer element.
200. A tube wall; 210. Coating;
300. the inner wall of the narrow groove; 310. And (4) coating.
Detailed Description
The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention.
As shown in fig. 1 to 3, the present invention provides a coating thickness gauge head 100, the coating thickness gauge head 100 includes a head body 10 and a handle 20, wherein the head body 10 is cylindrical and has a first mounting cavity 11 formed along an axial direction thereof, one end of the first mounting cavity 11 has an opening, and a measuring component 30 for measuring a thickness of a coating is mounted at the opening; the handle 20 is cylindrical and fixedly connected to the outer side wall of the probe body 10, a second mounting cavity 21 is formed in the handle 20, a circuit board 40 is arranged in the second mounting cavity 21, and the circuit board 40 is electrically connected with the measuring component 30 through an electric wire 50.
The utility model provides a coating thickness gauge probe 100 includes two parts of probe body 10 and handle 20, and places circuit board 40 in handle 20, only need install measuring component 30 in probe body 10 can, greatly reduced the volume of probe body 10 for probe body 10 is more small and exquisite; meanwhile, since the handle 20 is fixedly arranged at one side of the probe body 10, as shown in fig. 4 and 5, when the coating 210 of the small-diameter tube wall 200 and the coating 310 of the narrow-groove inner wall 300 are subjected to coating thickness measurement, the side head body 10 can conveniently extend into the inner cavity of the small-diameter tube and the inner part of the narrow groove for measurement, the length of the handle 20 does not need to be considered, and the application scenarios of the coating thickness gauge probe 100 can be enriched.
In an alternative embodiment of the present invention, the gauge head body 10 is compact in design and small in size, and can accurately measure the thickness of the inner wall coating of the pipe having an inner diameter of at least 28mm and the thickness of the inner wall coating of the narrow groove having a width of at least 26 mm.
In an optional example of the present invention, as shown in fig. 1, a mounting through hole is opened on a side wall of the measuring head body 10, an end cartridge of the handle 20 is inserted into the mounting through hole, and the second mounting cavity 21 is disposed along an axial direction of the handle 20 and is communicated with the first mounting cavity 11.
In an alternative example, the outer wall of the handle 20 has an interference fit with the inner wall of the mounting through-hole. Furthermore, the outer wall of the handle 20 is connected with the inner wall of the mounting through hole in an adhering mode, so that relative movement between the measuring head body 10 and the handle 20 is avoided, and the measuring accuracy and stability of the measuring head 100 of the coating thickness gauge are improved.
In an alternative example of the present invention, the circuit board 40 is disposed along the axial direction of the second mounting cavity 21 and spaced from the inner wall of the second mounting cavity 21. Thus, even if the handle 20 is made of a metal material having a better strength, a short circuit does not occur between the circuit board 40 and the handle 20.
In an alternative example, as shown in fig. 1 and fig. 2, circuit board brackets 60 are respectively disposed at two ends of the circuit board 40, the circuit board brackets 60 are cylindrical, an outer edge of the circuit board bracket 60 is fixedly connected to an inner wall of the second mounting cavity 21, an inner edge of the circuit board bracket 60 is provided with a mounting groove aligned with the circuit board 40, and the circuit board 40 is inserted into the mounting groove. Thus, the two ends of the circuit board 40 are fixed in the second mounting cavity 21 through the circuit board brackets 60, and have a gap with the inner wall of the second mounting cavity 21 (i.e., the inner wall of the handle 20), so as to avoid short circuit caused by the contact between the circuit board 40 and the handle 20.
Of course, in the embodiment, the circuit board support 60 is an insulating circuit board support, and the circuit board support 60 is provided with a communication hole 61 capable of allowing the electric wire 50 to pass through, and the electric wire 50 is also spaced from the inner wall of the second mounting cavity 21.
In the present invention, although the circuit board 40 is disposed in the handle 20, the connection relationship between the circuit board 40 and the magnetic core in the measurement component 30 does not need to be changed, and the circuit board 40 and the measurement component 30 are electrically connected by the wire 50.
In an alternative embodiment of the present invention, a cable 70 is further connected to the circuit board 40, and the cable 70 extends out of the handle 20 in a direction away from the probe body 10.
In an alternative example, a cable snap ring 71 is further disposed between the cable 70 and the inner wall of the handle 20 to prevent the cable 70 from shaking in the handle 20 and to prevent the cable 70 from being worn.
In an alternative embodiment, a cable sheath 72 is provided around the portion of the cable 70 extending outside the handle 20 to further protect the cable 70.
The utility model discloses an optional example, measurement element 30 installs at the opening part through location terminal 80, and location terminal 80 is the tube-shape, and the one end cartridge of location terminal 80 is in the opening, and the other end protrusion in the opening of location terminal 80, measurement element 30 set firmly in location terminal 80, and a plurality of V-arrangement grooves 81 have been seted up in the outer fringe of the open-ended terminal surface to its protrusion of location terminal 80. Thus, when the positioning terminal 80 contacts with the inner wall of the tubule, the top edges of the two side walls of the V-shaped groove 81 can be used as two fulcrums of the positioning terminal 80, so as to stably support the positioning terminal 80 and further ensure the stability of measurement.
In an alternative embodiment of the present invention, an elastic buffer element 90 is further disposed between the measuring assembly 30 and the inner wall of the first installation cavity 11.
In an alternative example, the resilient cushioning element 90 is a spring pad.
In the present invention, the principle of the measuring assembly 30 is the prior art, and in an optional example, as shown in fig. 6, the measuring assembly 30 includes a probe 31, a magnetic core 32, 33, 37, a coil frame 34, a primary coil 35 and a secondary coil 36, and the components of the measuring assembly 30 are bonded together to further ensure that the magnetic cores 32 and 33 do not become loose, thereby improving the accuracy of measurement. Specifically, one end of probe 31 is fitted into the bottom of the hole of core 32 and probe 31 and core 32 are glued by HJ-101. In the present invention, the measuring unit 30 can perform the electromagnetic measurement and the eddy current measurement at the same time.
In the following description of the embodiments, the invention is described in detail, but the description is not to be construed as limiting the invention for any reason, and in particular, the features described in the different embodiments may be combined with each other as desired, thereby forming other embodiments, and the features are understood to be applicable to any one embodiment and not limited to the described embodiments unless explicitly described to the contrary.
Claims (10)
1. A coating thickness gauge probe, comprising:
the measuring head body is cylindrical and is provided with a first mounting cavity which is formed along the axial direction of the measuring head body, one end of the first mounting cavity is provided with an opening, and a measuring assembly for measuring the thickness of a coating is arranged at the opening;
the handle is cylindrical and fixedly connected to the outer side wall of the measuring head body, a second mounting cavity is formed in the handle, a circuit board is arranged in the second mounting cavity, and the circuit board is electrically connected with the measuring assembly through an electric wire.
2. A coating thickness gauge probe according to claim 1, wherein the side wall of the probe body is provided with a mounting through hole, one end of the handle is inserted into the mounting through hole, and the second mounting cavity is arranged along the axial direction of the handle and is communicated with the first mounting cavity.
3. A coating thickness gauge probe according to claim 2, wherein the outer wall of the handle is an interference fit with the inner wall of the mounting through-hole.
4. A coating thickness gauge probe according to claim 3, wherein the outer wall of the handle and the inner wall of the mounting through-hole are also adhesively connected.
5. A coating thickness gauge probe according to claim 2, wherein the circuit board is disposed axially of the second mounting cavity and spaced from the inner wall of the second mounting cavity.
6. The measurement head of claim 5, wherein circuit board supports are respectively disposed at two ends of the circuit board, the circuit board supports are cylindrical, an outer edge of the circuit board support is fixedly connected to an inner wall of the second mounting cavity, an inner edge of the circuit board support is provided with mounting grooves aligned with the circuit board, and the circuit board is inserted into the mounting grooves.
7. The coating thickness gauge head of claim 6, wherein the circuit board support is an insulating circuit board support, and the circuit board support is provided with a communication hole for allowing a wire to pass through.
8. A coating thickness gauge probe according to claim 1, wherein a cable is also connected to the circuit board, the cable extending out of the handle in a direction away from the probe body.
9. The measurement head of claim 1, wherein the measurement module is mounted at the opening through a positioning terminal, the positioning terminal is cylindrical, one end of the positioning terminal is inserted into the opening, the other end of the positioning terminal protrudes out of the opening, the measurement module is fixedly mounted in the positioning terminal, and a plurality of V-shaped grooves are formed in the outer edge of the positioning terminal protruding out of the end face of the opening.
10. A coating thickness gauge probe according to claim 1, wherein a resilient cushioning element is also provided between the measurement module and the inner wall of the first mounting cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020198868.8U CN211477062U (en) | 2020-02-24 | 2020-02-24 | Measuring head of coating thickness gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020198868.8U CN211477062U (en) | 2020-02-24 | 2020-02-24 | Measuring head of coating thickness gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211477062U true CN211477062U (en) | 2020-09-11 |
Family
ID=72372288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020198868.8U Active CN211477062U (en) | 2020-02-24 | 2020-02-24 | Measuring head of coating thickness gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211477062U (en) |
-
2020
- 2020-02-24 CN CN202020198868.8U patent/CN211477062U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Measuring head of coating thickness gauge Effective date of registration: 20221101 Granted publication date: 20200911 Pledgee: Hengfeng bank Limited by Share Ltd. Beijing branch Pledgor: BEIJING TIME HIGH-TECHNOLOGY Ltd. Registration number: Y2022980020387 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20240307 Granted publication date: 20200911 |
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| PP01 | Preservation of patent right |