Electromagnetic ultrasonic thickness gauge probe and thickness gauge
By setting a protective layer and a thermal insulation protective cover in the ultrasonic thickness gauge probe, the problem of easy damage to the excitation coil in high-temperature environments is solved, and the durability and reliability of the probe are improved.
Patent Information
- Application Number
- CN202420612035.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-03-27
AI Technical Summary
When existing ultrasonic thickness gauge is used in high temperature environments, the excitation coil is prone to damage or failure due to collision or other factors.
A high-temperature resistant electromagnetic ultrasonic thickness gauge probe is designed, using a protective layer to separate the excitation coil from the external workpiece to be tested, and a thermal insulation protective cover is provided in the probe to block the high temperature.
Through the design of the protective layer and thermal insulation protective cover, the risk of damage or failure of the excitation coil due to collisions is reduced, and the reliability and durability of the probe in high-temperature environments are improved.
Smart Images
Figure CN222761584U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dimension measuring equipment, in particular to an electromagnetic ultrasonic thickness gauge probe and a thickness gauge. Background Art
[0002] Ultrasonic thickness gauge is an instrument that uses the principle of ultrasonic pulse reflection to measure the thickness of an object. When the ultrasonic pulse emitted by the probe passes through the object to be measured and reaches the material interface, the pulse is reflected back to the probe, and the thickness of the material to be measured is determined by accurately measuring the time it takes for the ultrasonic wave to propagate in the material. Ultrasonic thickness gauge has the advantages of wide measuring range, high measuring accuracy, simple operation, and no damage to the object to be measured, and is widely used in various industrial fields.
[0003] The inventor of the present application found in the process of realizing the invention that the existing ultrasonic thickness gauge has some problems in the application of the test environment. For example, the excitation coil is directly exposed to the workpiece to be tested, which may be easily damaged or fail due to collision or other factors. Summary of the invention
[0004] In view of this, the embodiments of the present application provide a high temperature resistant electromagnetic ultrasonic thickness gauge probe and a thickness gauge, which can reduce the risk of damage or failure of the excitation coil due to collision or the like to a certain extent.
[0005] In order to achieve the above objectives, this application adopts the following technical solutions:
[0006] In a first aspect, an embodiment of the present application provides an electromagnetic ultrasonic thickness gauge probe, comprising: a housing having a receiving cavity;
[0007] A magnet is disposed in the accommodating cavity;
[0008] An excitation coil is arranged at the bottom of the accommodating cavity and below the magnet;
[0009] The protective layer is located at the bottom of the excitation coil and is used to support the excitation coil and separate the excitation coil from the external workpiece to be measured.
[0010] Optionally, an open groove is provided at the bottom of the shell, and the protective layer is arranged in the open groove.
[0011] Optionally, the protective layer is a mica sheet, a ceramic sheet or a carbon fiber sheet.
[0012] Optionally, a heat insulation protective cover is installed at the lower part of the shell.
[0013] Optionally, the heat insulation protective cover comprises: a base, the base has a hollow cylindrical space, a heat insulation layer installation platform is provided on the inner wall of the base and extends into the hollow cylindrical space, and a cavity is separated at the bottom of the heat insulation layer installation platform.
[0014] Optionally, a first heat insulation layer is provided in the cavity, and the first heat insulation layer and the protective layer are arranged correspondingly up and down.
[0015] Optionally, the first thermal insulation layer is an aerogel pad.
[0016] Optionally, the magnet is surrounded by a second thermal insulation layer, and the outer side of the second thermal insulation layer is in contact with the side wall of the accommodating cavity.
[0017] Optionally, a flexible printed circuit board is surrounded by the magnet, the second heat insulation layer surrounds the outside of the flexible printed circuit, one end of the flexible printed circuit board is interconnected with the excitation coil, and is wound around the first side, the upper part and the second side of the magnet from the excitation coil to the bottom, and the other end of the flexible printed circuit board is attached to the bottom of the magnet, and the part of the flexible printed circuit board attached to the bottom of the magnet is used to form a magnetic shielding layer
[0018] In a second aspect, the present invention also provides an electromagnetic ultrasonic thickness gauge, including: a thickness gauge host having an ultrasonic emission interface;
[0019] The electromagnetic ultrasonic thickness gauge probe described in any one of the first aspects is installed on the thickness gauge host through the shell, the upper part of the magnet is arranged corresponding to the ultrasonic transmitting interface, and the ultrasonic transmitting interface is electrically interconnected with the excitation coil.
[0020] The electromagnetic ultrasonic thickness gauge probe and thickness gauge provided by the embodiment of the utility model improve the structure of the electromagnetic ultrasonic thickness gauge probe, and at least a protective layer is provided at the bottom of the excitation coil to support the excitation coil and separate the excitation coil from the workpiece to be measured below. When used to measure the workpiece, the excitation coil is separated from the workpiece to be measured below by the protective layer to avoid direct exposure and contact between the excitation coil and the workpiece to be measured, thereby protecting the upper magnet and the excitation coil, thereby reducing the risk of damage or failure of the excitation coil due to collision or the like to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 The figure is a schematic structural diagram of an embodiment of an electromagnetic ultrasonic thickness gauge probe of the utility model. DETAILED DESCRIPTION
[0023] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.
[0024] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] As described in the background technology section, there are some problems with the application of existing ultrasonic thickness gauge probes in high temperature environments. For example, some high-temperature thickness gauges need to test workpieces in high temperature environments, such as boilers, pipelines, reactors, etc., and the surface temperature of these workpieces often exceeds 300°C, and even reaches 500°C, 600°C or above. This requires the probe to be able to withstand high temperatures and to be effectively coupled with the high-temperature workpiece to ensure the accuracy and reliability of the measurement. However, most of the existing ultrasonic thickness gauge probes use a coil and magnet structure, and both the coil and the magnet cannot withstand such high temperatures and are easily damaged or fail.
[0026] Therefore, see Figure 1 As shown, the embodiment of the utility model provides a high temperature resistant electromagnetic ultrasonic thickness gauge probe 100, which is suitable for electromagnetic ultrasonic testing scenarios, and includes: a housing 1, with a receiving cavity 11; the housing 1 can be made of metal or non-metallic materials, and has a certain strength and wear resistance to adapt to different working environments. For high temperature working environments, the housing 1 can also be made of high temperature resistant materials. The shape and size of the housing 1 can be designed as needed.
[0027] The magnet 2 is disposed in the accommodating cavity 11; it is a component for generating a stable constant magnetic field, the magnitude and direction of which have an important influence on the excitation and reception of electromagnetic ultrasound. The magnet 2 can be a permanent magnet 2, for example, a permanent magnet or some permanent magnet 2 made of alloy material doped with iron.
[0028] The excitation coil 3 is arranged at the bottom of the accommodating cavity 11 and below the magnet 2;
[0029] The protective layer 4 is located at the bottom of the excitation coil 3, and is used to support the excitation coil 3 and separate the excitation coil 3 from the external workpiece to be measured. In this way, when used to measure the workpiece, the excitation coil is separated from the workpiece to be measured below by the protective layer, avoiding direct exposure and contact between the excitation coil and the workpiece to be measured, thereby protecting the upper magnet and the excitation coil, thereby reducing the risk of damage or failure of the excitation coil due to collision, etc. to a certain extent.
[0030] In some embodiments, the bottom of the housing 1 is provided with an open groove, and the protective layer is provided in the open groove. Specifically, the protective layer is a mica sheet, a ceramic sheet or a carbon fiber sheet.
[0031] Among them, mica is a mineral material with a layered structure, the main components of which are silicate and aluminate. Their crystal structure is composed of a silicate layer and an aluminum oxide (or magnesium oxide) layer arranged alternately, thus forming a series of parallel layers. This layered structure gives mica good physical properties, such as high insulation performance, excellent high temperature resistance, good chemical stability, etc. In this way, by using mica as a protective layer, the high temperature resistance of the ultrasonic thickness gauge probe can be improved.
[0032] In some embodiments, the excitation coil 3 is fixed to the excitation coil fixing position, and the mica sheet, ceramic sheet or carbon fiber plate can be adhered to the bottom of the excitation coil fixing position through silicone to provide protection and heat insulation, thereby preventing the coil from being damaged by external forces. Of course, considering the manufacturing process, the excitation coil 3 can also be directly adhered to the protective layer 4.
[0033] Continue to view Figure 1 A heat insulation protective cover 5 is installed at the lower part of the housing 1. In this way, when measuring ultra-high temperature, the heat insulation effect can be further improved through the heat insulation protective cover 5.
[0034] In some embodiments, the heat insulation protective cover 5 includes: a base 51 and a second heat insulation layer 52, the base 51 has a hollow cylindrical space, a heat insulation layer installation platform is provided on the inner wall of the base 51, the second heat insulation layer 52 is embedded and fixed on the bottom surface of the heat insulation layer installation platform, and the upper surface of the second heat insulation layer 52 is arranged corresponding to the protective layer 4. The second heat insulation layer 52 can be bonded to the base 51 by silica gel.
[0035] In some embodiments, an inner wall of the base 51 is provided with an internal thread, and an outer wall of the shell 1 is provided with an external thread, and the shell 1 is fixedly connected with the internal thread of the base 51 through the cooperation of the external thread.
[0036] Preferably, the second heat insulating layer 52 is an aerogel pad. Thus, further heat insulation can be achieved by using an aerogel pad with the best heat insulating effect, thereby improving the heat insulating effect.
[0037] In some embodiments, the housing 1 and the base 51 may be made of stainless steel.
[0038] Since the magnet 2, such as a magnet, loses its magnetism at high temperatures, in some embodiments, the magnet 2 is surrounded by a third thermal insulation layer 6, and the outer side of the third thermal insulation layer 6 abuts against the side wall of the accommodating cavity 11. By covering the third thermal insulation layer 6 on the outside of the magnet 2, the magnet 2 can be prevented from failing due to high temperature. The third thermal insulation layer 6 can also be made of aerogel to form a thermal insulation pad.
[0039] Please continue to see Figure 1 Specifically, the magnet 2 is surrounded by a flexible printed circuit board 7, the third thermal insulation layer 6 surrounds the outside of the flexible printed circuit board, one end of the flexible printed circuit board 7 is interconnected with the excitation coil 3, and is wound from the excitation coil 3 around the first side, the upper part and the second side to the bottom of the magnet 2, and the other end of the flexible printed circuit board 7 is attached to the bottom of the magnet 2, and the part of the flexible printed circuit board 7 attached to the bottom of the magnet 2 is used to form a magnetic shielding layer 71.
[0040] It can be understood that, since the flexible printed circuit board 7 (Flexible Printed Circuit Board, FPC for short) includes multiple layers of copper cladding, in the present application, the copper cladding of the flexible printed circuit board 7 is used to form the magnetic field shielding layer. The flexible printed circuit board 7 has good bendability. When it is rolled up on the magnet 2, it is easy to bend and not easy to warp or break.
[0041] In addition, in this embodiment, the flexible printed circuit board 7 can also be integrated with an interface board 72 for electrically interconnecting with the thickness gauge host. Of course, in order to highlight the innovative purpose of the present utility model, the interface board and other known components will not be described in detail.
[0042] Specifically, a magnetic concentrator 8 is provided in the accommodating cavity 11, between the lower part of the magnetic field shielding layer formed by the FPC and the excitation coil 3. The magnetic concentrator 8 is a component used to enhance the alternating magnetic field of the excitation coil 3, and can be made of magnetic material or other types of materials to improve the output power of the excitation coil 3 and the excitation efficiency of the electromagnetic ultrasonic wave. The magnetic concentrator 8 can be cylindrical, annular or other shaped structures to meet the requirements of different spaces and shapes.
[0043] According to the above disclosure, the electromagnetic ultrasonic thickness gauge probe provided in the embodiment of the utility model improves the structure of the electromagnetic ultrasonic thickness gauge probe, and at least a protective layer 4 is provided at the bottom of the excitation coil 3, which is used to separate the magnet 2 and the excitation coil 3 from the workpiece to be measured below, and is used to carry the excitation coil and separate the excitation coil from the workpiece to be measured below. When used to measure the workpiece, the excitation coil is separated from the workpiece to be measured below by the protective layer to avoid direct exposure and contact between the excitation coil and the workpiece to be measured, so as to achieve protection of the upper magnet and the excitation coil, thereby reducing the risk of damage or failure of the excitation coil due to collision to a certain extent.
[0044] Furthermore, by providing a heat-insulating layer, the high temperature of the workpiece to be measured below is blocked, and heat-insulating protection for the upper magnet 2 and the excitation coil 3 is achieved, thereby being adaptable to workpiece measurement in a high-temperature environment.
[0045] Based on the same technical concept as the above-mentioned utility model embodiment, the utility model also provides an electromagnetic ultrasonic thickness gauge, including:
[0046] It includes: a thickness gauge host with an ultrasonic transmitting interface;
[0047] The electromagnetic ultrasonic thickness gauge probe described in any of the above embodiments is installed on the thickness gauge host through the shell 1, the upper part of the magnet 2 is arranged corresponding to the ultrasonic transmitting interface, and the ultrasonic transmitting interface is electrically interconnected with the excitation coil 3.
[0048] The electromagnetic ultrasonic thickness gauge provided by the embodiment of the utility model is based on the same technical concept as the aforementioned electromagnetic ultrasonic thickness gauge probe embodiment, and its technical effect is also basically the same, and it can be adapted to thickness measurement of workpieces in high temperature environments. Other similarities will not be repeated.
[0049] The ultrasonic thickness gauge probe provided by the utility model has multiple high-temperature protection structures, which can play a role in isolating high temperatures. At the same time, the protective layer is used outside the excitation coil 3 for mechanical anti-collision protection. When a high-temperature resistant and high-strength mica sheet is used, it can also block the heat from below and adapt to high-temperature testing environments. In addition, by setting a heat insulation cover, heat insulation can be further performed to further improve the heat insulation effect.
[0050] It should be noted that, in this article, the terms "upper", "lower" and other terms indicating orientation or positional relationship are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. Relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the phrase "comprising a ..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements. For ordinary technicians in this field, it can be understood by specific circumstances.
[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims
1. An electromagnetic ultrasonic thickness gauge probe, characterized in that: include: A housing having a receiving cavity; A magnet is disposed in the accommodating cavity; An excitation coil is arranged at the bottom of the accommodating cavity and below the magnet; The protective layer is located at the bottom of the excitation coil and is used to support the excitation coil and separate the excitation coil from the external workpiece to be measured.
2. The electromagnetic ultrasonic thickness gauge probe according to claim 1, characterized in that: An open groove is arranged at the bottom of the shell, and the protective layer is arranged in the open groove.
3. The electromagnetic ultrasonic thickness gauge probe according to claim 1, characterized in that: The protective layer is a mica sheet, a ceramic sheet or a carbon fiber sheet.
4. The electromagnetic ultrasonic thickness gauge probe according to claim 1, characterized in that: A heat insulation protective cover is installed at the lower part of the shell.
5. The electromagnetic ultrasonic thickness gauge probe according to claim 4, characterized in that: The heat insulation protective cover comprises: a base having a hollow cylindrical space, an insulation layer installation platform is arranged on the inner wall of the base and extends into the hollow cylindrical space, and a cavity is separated at the bottom of the insulation layer installation platform.
6. The electromagnetic ultrasonic thickness gauge probe according to claim 5, characterized in that: A first heat insulating layer is disposed in the cavity, and the first heat insulating layer and the protective layer are disposed correspondingly up and down.
7. The electromagnetic ultrasonic thickness gauge probe according to claim 6, characterized in that: The first heat insulation layer is an aerogel pad.
8. The electromagnetic ultrasonic thickness gauge probe according to claim 1, characterized in that: The magnet is surrounded by a second heat insulation layer, and the outer side of the second heat insulation layer is in contact with the side wall of the accommodating cavity.
9. The electromagnetic ultrasonic thickness gauge probe according to claim 8, characterized in that: The magnet is surrounded by a flexible printed circuit board, the second thermal insulation layer surrounds the outside of the flexible printed circuit board, one end of the flexible printed circuit board is interconnected with the excitation coil, and is wound around the first side, top and second side of the magnet to the bottom from the excitation coil, and the other end of the flexible printed circuit board is attached to the bottom of the magnet, and the part of the flexible printed circuit board attached to the bottom of the magnet is used to form a magnetic shielding layer.
10. An electromagnetic ultrasonic thickness gauge, characterized in that: include: Thickness gauge host, with ultrasonic emission interface; The electromagnetic ultrasonic thickness gauge probe according to any one of claims 1 to 9 is installed on the thickness gauge host through the housing, the upper part of the magnet is arranged corresponding to the ultrasonic transmitting interface, and the ultrasonic transmitting interface is electrically interconnected with the excitation coil.