CN105268619A - Gas ultrasonic transducer with metal protection film structure at front end of matching layer - Google Patents
Gas ultrasonic transducer with metal protection film structure at front end of matching layer Download PDFInfo
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- CN105268619A CN105268619A CN201510801023.7A CN201510801023A CN105268619A CN 105268619 A CN105268619 A CN 105268619A CN 201510801023 A CN201510801023 A CN 201510801023A CN 105268619 A CN105268619 A CN 105268619A
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Abstract
The invention discloses a gas ultrasonic transducer with a metal protection film structure at the front end of a matching layer. A metal shell is internally provided with a plastic shell, a metal pressing plate and a hard sealing glue layer from bottom to top in sequence. Two wire cores in a wire are welded to the edge of the positive electrode face and the edge of the negative electrode face of a piezoelectric plate respectively. The upper end face of the piezoelectric plate is connected with a boss in the center of the plastic shell, and the lower end face of the piezoelectric plate is embedded in a positioning groove in the center of the upper end face of the matching layer. The part among the piezoelectric plate, the matching layer and the plastic shell is filled with a flexible glue filling layer. A cap-shaped metal protection film is arranged on the lower end face of the plastic shell in a sleeving manner and connected with the lower end face of the matching layer, and a sealing ring is arranged between the brim of the cap-shaped metal protection film and the metal shell. The gas ultrasonic transducer has extremely good high-pressure resistance and corrosion resisting capability and is suitable for being installed in a gas ultrasonic flow meter used for metering the volume flow of high-pressure gas media containing a trace of solid particles and a trace of liquid impurities and powered through a low-voltage power source.
Description
Technical field
The present invention relates to gas ultrasound wave transducer, especially relate to the gas ultrasound wave transducer of end band metal protective film structure before a kind of matching layer.
Background technology
Ultrasonic Wave Flowmeter is because accuracy of measurement is high, range ratio is wide, without crushing, without features such as movable member, mounting cost are low, just starting gradually, substituting traditional mechanical type gas flowmeter on a large scale.In Ultrasonic Wave Flowmeter, partial discharge meter uses built-in power to power, the voltage of power supply is general lower, the gas ultrasound wave transducer wherein used is generally the acoustical match type gas ultrasound wave transducer that low-voltage can be used to excite can obtain higher sensitivity, the matching layer material of this transducer front end is all generally low-density material, texture material is partially soft, easy absorption spot, is also very easily worn.Matching layer surface adhesion spot, or be worn, all can have a negative impact to the performance of gas ultrasound wave transducer, even lose efficacy, and then affect the measuring accuracy of gas flowmeter.Therefore, when design is applicable to the gas ultrasound wave transducer of Ultrasonic Wave Flowmeter, must consider to add layer protecting film on the matching layer surface of Ultrasonic Wave Flowmeter.
Summary of the invention
The object of the present invention is to provide the gas ultrasound wave transducer of end band metal protective film structure before a kind of matching layer; it has resistant, wear-resisting, high pressure resistant, is suitablely arranged on the Ultrasonic Wave Flowmeter that can measure, use LVPS to power the volume flow of the high-pressure gas medium containing trace solid particulate and micro liquid impurity.
In order to reach foregoing invention object, the technical solution used in the present invention is:
The present invention includes piezoelectric patches, matching layer, metal protective film, sealing ring, plastic housing, flexible glue packed layer, metal platen, metal-back, hard sealant layer and wire; In metal-back, matching layer, piezoelectric patches, metal platen and hard sealant layer are housed from bottom to up successively, two cores in wire are welded on the positive pole-face of piezoelectric patches and the edge in negative pole face respectively, and the screen layer of wire is connected with metal-back.Between matching layer and metal-back, plastic housing is housed; matching layer and piezoelectric patches are positioned at plastic housing; the upper surface of piezoelectric patches is connected with the boss at plastic housing center; the lower surface of piezoelectric patches embeds in the locating slot at center, matching layer upper surface; piezoelectric patches, between matching layer and plastic housing, fill flexible glue packed layer; hat shape metal protective film is enclosed within the lower surface of plastic housing, and hat shape metal protective film is connected with matching layer lower surface, between the shade of hat shape metal protective film and metal-back, sealing ring is housed.
Between the shade of described hat shape metal protective film and metal-back, sealing ring is housed, uses the front end of metal platen to compress, ensure the bubble-tight first time encapsulation of transducer, the rear end of metal platen is hard sealant layer, ensures the bubble-tight second time encapsulation of transducer.
The thickness of described hat shape metal protective film is 0.03 ~ 0.5mm.
The beneficial effect that the present invention has is:
1) transducer matching layer front end is with metal protective film, can improve the antifouling of transducer and antiwear property, ensures that transducer still can normally use at the gas medium containing trace solid particulate and micro liquid impurity;
2) transducer uses the dual packaged structure of plastic housing and metal-back, namely facilitates the assembling of transducer, turn improves air-tightness and the high-voltage resistance capability of transducer;
3) in transducer, matching layer diameter is greater than piezoelectric patches diameter, reduces transducer signal size and signal waveform to the susceptibility of matching layer thickness error, the uniformity of favourable raising transducer performance;
4) detent that the matching layer of transducer has piezoelectric patches to install, facilitates the installation of piezoelectric patches.
The present invention is suitable for being arranged on and can measures the volume flow of the high-pressure gas medium containing trace solid particulate and micro liquid impurity, in the Ultrasonic Wave Flowmeter that uses LVPS to power.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, piezoelectric patches, 2, matching layer, 3, metal protective film, 4, sealing ring, 5, plastic housing, 6, flexible glue packed layer, 7, metal platen, 8, metal-back, 9, hard sealant layer, 10, wire.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the present invention includes piezoelectric patches 1, matching layer 2, metal protective film 3, sealing ring 4, plastic housing 5, flexible glue packed layer 6, metal platen 7, metal-back 8, hard sealant layer 9 and wire 10; In metal-back 8, plastic housing 5, metal platen 7 and hard sealant layer 9 are housed from bottom to up successively, two cores in wire 10 are welded on the positive pole-face of piezoelectric patches 1 and the edge in negative pole face respectively, the screen layer of wire 10 is connected with metal-back 8, and this structure can improve the signal to noise ratio of transducer.Matching layer 2 and piezoelectric patches 1 are positioned at plastic housing 5; the upper surface of piezoelectric patches 1 is connected with the boss at plastic housing 5 center; the lower surface of piezoelectric patches 1 embeds in the locating slot at center, matching layer 2 upper surface; piezoelectric patches 1, between matching layer 2 and plastic housing 5, fill flexible glue packed layer 6; hat shape metal protective film 3 is enclosed within the lower surface of plastic housing 5; hat shape metal protective film 3 is connected with matching layer 2 lower surface, between the shade of hat shape metal protective film 3 and metal-back 8, sealing ring 4 is housed.
Piezoelectric patches 1 is the conversion element of electric energy and mechanical energy, the positive terminal of piezoelectric patches 1 is bonded with matching layer 2, and the diameter of matching layer 2 is greater than piezoelectric patches 1, and matching layer 2 has locating slot so that piezoelectric patches 1 and matching layer 2 position centering; Piezoelectric patches 1 and matching layer 2 bonding after be assemblied in plastic housing 5, the negative pole end of piezoelectric patches 1 contacts with the boss of plastic housing 5 inside and carries out axial location to ensure overall transducer withstand voltage properties in plastic housing 5.
Between the shade of described hat shape metal protective film 3 and metal-back 8, sealing ring 4 is housed; the front end of metal platen 7 is used to compress; ensure the bubble-tight first time encapsulation of transducer, the rear end of metal platen 7 is hard sealant layers 9, ensures the bubble-tight second time encapsulation of transducer.
The thickness of described hat shape metal protective film 3 is 0.03 ~ 0.5mm.
As shown in Figure 1, on the outward flange of the both positive and negative polarity end face of piezoelectric patches 1 welding lead 10 two cores after, on the positive pole end face of piezoelectric patches 1, coat the bi-component glue mixed again, the groove of matching layer 2 with the one side of detent is alignd with piezoelectric patches, compresses; After bonding piezoelectric patches 1 and the bi-component glue of matching layer 2 solidify, after wire 10 is passed from the hole of plastic housing 5 rear end, another root core of wire 10 is welded on the negative pole end face outward flange of piezoelectric patches 1, again the transducer core that piezoelectric patches 1 and matching layer 2 form is loaded in plastic housing 5, the external cylindrical surface of matching layer 2 becomes matched in clearance with the endoporus of plastic housing 5, and the boss in the negative pole end face of piezoelectric patches 1 and plastic housing 5 is adjacent to; From the rear stomidium of plastic housing 5, in the space between piezoelectric patches 1 and plastic housing 5, inject liquid flexible glue, after liquid flexible glue solidification, form flexible glue packed layer 6; The front end face of matching layer 2 is coated with gluing, is pasted by metal protective film 3 on matching layer 2, the inner cylinder face of metal protective film 3 and plastic housing 5 external cylindrical surface interference fit, metal coating film thickness is generally chosen between 0.03 ~ 0.5mm; Sealing ring 4 on the external cylindrical surface of metal protective film 3 overlaps; Above-mentioned parts are loaded in the inner chamber of metal-back 8, use metal platen 7 that metal protective film 3 front end face is depressed into metal-back front end face concordant; The screen layer of wire 10 is bonded in metal platen 7, pours into liquid sealant from the rear end of metal-back 8, after liquid airproof adhesive curing, form hard sealant layer 9.
Claims (3)
1. the gas ultrasound wave transducer of end band metal protective film structure before matching layer, comprises piezoelectric patches (1), matching layer (2), metal platen (7), metal-back (8), hard sealant layer (9) and wire (10), matching layer (2), piezoelectric patches (1), metal platen (7) and hard sealant layer (9) are housed in metal-back (8) from bottom to up successively, two cores in wire (10) are welded on the positive pole-face of piezoelectric patches (1) and the edge in negative pole face respectively, and the screen layer of wire (10) is connected with metal-back (8), it is characterized in that: plastic housing (5) is housed between matching layer (2) and metal-back (8), matching layer (2) and piezoelectric patches (1) are positioned at plastic housing (5), the upper surface of piezoelectric patches (1) is connected with the boss at plastic housing (5) center, the lower surface of piezoelectric patches (1) embeds in the locating slot at matching layer (2) center, upper surface, piezoelectric patches (1), flexible glue packed layer (6) is filled between matching layer (2) and plastic housing (5), hat shape metal protective film (3) is enclosed within the lower surface of plastic housing (5), hat shape metal protective film (3) is connected with matching layer (2) lower surface, between the shade of hat shape metal protective film (3) and metal-back (8), sealing ring (4) is housed.
2. the gas ultrasound wave transducer of end band metal protective film structure before a kind of matching layer according to claim 1, is characterized in that: the thickness of described hat shape metal protective film (3) is 0.03 ~ 0.5mm.
3. the gas ultrasound wave transducer of end band metal protective film structure before a kind of matching layer according to claim 1; it is characterized in that: between the shade of described hat shape metal protective film (3) and metal-back (8), sealing ring (4) is housed; the front end of metal platen (7) is used to compress; ensure the bubble-tight first time encapsulation of transducer; the rear end of metal platen (7) is hard sealant layer (9), ensures the bubble-tight second time encapsulation of transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510801023.7A CN105268619B (en) | 2015-11-19 | 2015-11-19 | Gas ultrasound wave transducer of the matching layer front end with metal coating membrane structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510801023.7A CN105268619B (en) | 2015-11-19 | 2015-11-19 | Gas ultrasound wave transducer of the matching layer front end with metal coating membrane structure |
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| CN105268619A true CN105268619A (en) | 2016-01-27 |
| CN105268619B CN105268619B (en) | 2017-07-14 |
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| CN201510801023.7A Active CN105268619B (en) | 2015-11-19 | 2015-11-19 | Gas ultrasound wave transducer of the matching layer front end with metal coating membrane structure |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105478333A (en) * | 2016-01-28 | 2016-04-13 | 浙江大学 | Gas ultrasonic transducer for performing pressure balancing on matching layer and piezoelectric plate |
| CN107051851A (en) * | 2016-06-17 | 2017-08-18 | 济南新盛电子科技有限公司 | A kind of alliteration journey bimorph ultrasonic transducer |
| CN107436166A (en) * | 2017-09-07 | 2017-12-05 | 上海诺仪表有限公司 | A kind of ultrasonic flowmeter transducer |
| CN107990924A (en) * | 2017-12-07 | 2018-05-04 | 广东奥迪威传感科技股份有限公司 | A kind of ultrasonic sensor |
| CN110087783A (en) * | 2016-12-09 | 2019-08-02 | 申舒斯美国有限公司 | Thickness mode sensor and relevant device and method |
| CN110465473A (en) * | 2019-09-16 | 2019-11-19 | 西安安森智能仪器股份有限公司 | A kind of ultrasonic transducer of high pressure resistant structure |
| CN111632283A (en) * | 2020-04-27 | 2020-09-08 | 深圳市普罗医学股份有限公司 | Ultrasonic treatment equipment for chest and lung treatment |
| CN114308600A (en) * | 2021-12-16 | 2022-04-12 | 国网山东省电力公司烟台供电公司 | Air coupling ultrasonic transducer for non-contact detection of insulation defects of switch cabinet |
| CN115210005A (en) * | 2019-08-28 | 2022-10-18 | Scr工程有限公司 | Fluid analysis apparatus |
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| US4030175A (en) * | 1975-08-11 | 1977-06-21 | Westinghouse Electric Corporation | Method of making a metal enclosed transducer assembly |
| JPS60208199A (en) * | 1984-04-02 | 1985-10-19 | Matsushita Electric Ind Co Ltd | Ultrasonic wave transmitter-receiver |
| US5664456A (en) * | 1995-09-28 | 1997-09-09 | Endress+Hauser Gmbh+Co. | Ultrasonic transducer |
| CN102873018A (en) * | 2012-09-18 | 2013-01-16 | 浙江大学 | Ultrasonic transducer with matching layer being solidified asynchronously |
| CN205199872U (en) * | 2015-11-19 | 2016-05-04 | 浙江大学 | Gaseous ultrasonic transducer of end band metal protection membrane structure before matching layer |
-
2015
- 2015-11-19 CN CN201510801023.7A patent/CN105268619B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4030175A (en) * | 1975-08-11 | 1977-06-21 | Westinghouse Electric Corporation | Method of making a metal enclosed transducer assembly |
| JPS60208199A (en) * | 1984-04-02 | 1985-10-19 | Matsushita Electric Ind Co Ltd | Ultrasonic wave transmitter-receiver |
| US5664456A (en) * | 1995-09-28 | 1997-09-09 | Endress+Hauser Gmbh+Co. | Ultrasonic transducer |
| CN102873018A (en) * | 2012-09-18 | 2013-01-16 | 浙江大学 | Ultrasonic transducer with matching layer being solidified asynchronously |
| CN205199872U (en) * | 2015-11-19 | 2016-05-04 | 浙江大学 | Gaseous ultrasonic transducer of end band metal protection membrane structure before matching layer |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105478333A (en) * | 2016-01-28 | 2016-04-13 | 浙江大学 | Gas ultrasonic transducer for performing pressure balancing on matching layer and piezoelectric plate |
| CN107051851A (en) * | 2016-06-17 | 2017-08-18 | 济南新盛电子科技有限公司 | A kind of alliteration journey bimorph ultrasonic transducer |
| CN107051851B (en) * | 2016-06-17 | 2022-04-22 | 济南新盛电子科技有限公司 | Double-sound-path double-piezoelectric-plate ultrasonic transducer |
| CN110087783A (en) * | 2016-12-09 | 2019-08-02 | 申舒斯美国有限公司 | Thickness mode sensor and relevant device and method |
| CN107436166A (en) * | 2017-09-07 | 2017-12-05 | 上海诺仪表有限公司 | A kind of ultrasonic flowmeter transducer |
| CN107990924A (en) * | 2017-12-07 | 2018-05-04 | 广东奥迪威传感科技股份有限公司 | A kind of ultrasonic sensor |
| CN115210005A (en) * | 2019-08-28 | 2022-10-18 | Scr工程有限公司 | Fluid analysis apparatus |
| CN115210005B (en) * | 2019-08-28 | 2024-04-23 | Scr工程有限公司 | Fluid analysis apparatus |
| CN110465473A (en) * | 2019-09-16 | 2019-11-19 | 西安安森智能仪器股份有限公司 | A kind of ultrasonic transducer of high pressure resistant structure |
| CN111632283A (en) * | 2020-04-27 | 2020-09-08 | 深圳市普罗医学股份有限公司 | Ultrasonic treatment equipment for chest and lung treatment |
| CN114308600A (en) * | 2021-12-16 | 2022-04-12 | 国网山东省电力公司烟台供电公司 | Air coupling ultrasonic transducer for non-contact detection of insulation defects of switch cabinet |
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|---|---|
| CN105268619B (en) | 2017-07-14 |
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