CN207147569U - A kind of highly reliable high stable ultrasonic flow transducer - Google Patents
A kind of highly reliable high stable ultrasonic flow transducer Download PDFInfo
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- CN207147569U CN207147569U CN201721110449.9U CN201721110449U CN207147569U CN 207147569 U CN207147569 U CN 207147569U CN 201721110449 U CN201721110449 U CN 201721110449U CN 207147569 U CN207147569 U CN 207147569U
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Abstract
The utility model discloses a kind of highly reliable high stable ultrasonic flow transducer.It includes shell, and shell upper surface cavity forms step with lower surface cavity connecting portion, and the hat brim of block is pressed on the step；Piezo ceramic element, elastic rubber fitting and block and connecting line are arranged in shell；The pad of piezo ceramic element two is located in the monosymmetric groove of block, and piezo ceramic element connecting line is drawn by the symmetrical lead groove on block both sides, and the piezo ceramic element connecting line of extraction is located in block centre bore, is sealed in by sealant layer in shell；Buckle is set on the cavity inner round wall of shell upper end, and by snap lock in shell, shell lower end outside wall is provided with the platform for accommodating sealing ring with shell upper end cavity lateral wall junction for block.With good sealing effect, resistance to pressure is good, service life is long, reliable, stable the advantages of.
Description
Technical field
Ultrasonic sensor technical field is the utility model is related to, more specifically it is a kind of highly reliable high stable ultrasound
Flow sensor.
Background technology
Energy-conservation is China's economy and a long-range strategy and policy of social development, as economic construction of China continues at a high speed
Develop and deepen continuously, in the horizontal raising of electronic technology, the network information technology, sensor technology and the depth of commercial application
Enter, various advanced flowmeter technologies are widely used in the design and use of ultrasonic base table, the development of ultrasonic meter
The impetus is swift and violent, to realize the metering of domestic energy, control, monitoring and management, improves the comprehensive utilization ratio of the energy, establishes saving energy
The consciousness in source, and develop as the supporting ultrasonic flow transducer of ultrasonic meter.
Matching layer is the core material for manufacturing ultrasonic flow transducer, and acoustic matching layer material is nothing more than following several：It is common
There is special plastic：PPS, ABS, polysulfones, macromolecule resin etc.；Second of metal material：316L steel, H59 copper or titanium alloy etc..
In process of the present invention is realized, inventor has found that existing several ultrasonic flow transducers have asking for following several respects
Topic：First aspect：More than several sensors all exist under more than 1.6Mpa pressure environments or refrigerated environment or more than 90 degree
Easily there is signal attenuation until no signal in high/low temperature circulation in high temperature, the appearance of this phenomenon for piezoelectric ceramics electrode surface with
Insecure come unglued of the bonding of above material causes, and fails positive true solution and determines metal covering and hot spear resin material, metal and metal material
Technique for sticking between material；Second aspect：Several sensor internals design inner chambers are that cylinder is integral above, no anchor point, adhesive linkage
Consistency of thickness can not ensure that impedance matching difference is big；The third：Several sensors are sent out using ceramic chips above
Penetrate face to bond together by bonded adhesives and shell, top directly fills fluid sealant, under outside uncertain environment, because of each several part material
The coefficient of expansion of material is different, and internal stress can not effectively discharge, and there is gap, coming unglued causes the unstable of output signal or without letter
Number.
Application No. 201610542465.9, patent name are《A kind of ultrasonic flow transducer structure and its assembling positioning
Method》Ultrasonic flow transducer structure and localization method are disclosed, with acoustic-electric conversion efficiency is low, sensitivity is not high, the surface of emission
Or reflecting surface is also easy to produce the shortcomings that bubble influences measurement accuracy.
Application No. 02106676.0, patent name are《Ultrasonic sensor, the method for manufacturing ultrasonic sensor and super
Acoustic wave flow meter》, the manufacture method of ultrasonic flow transducer is disclosed, has that anti-pressure ability is poor, sensitivity is low, application field is narrow
The shortcomings that.
Application No. 201621083769.5, patent name are《A kind of ultrasonic flow sensor》Disclose sensor sheet
Circuit control box and transducing head on body, there is error under low discharge environment to be also easy to produce vortes interference greatly, under heavy traffic condition
The shortcomings that measuring accuracy, high cost.
The content of the invention
The purpose of this utility model is to provide a kind of highly reliable high stable ultrasonic flow transducer, suitable for ultrasonic wave cold
Table, calorimeter, improve electrode surface and shell adhesive strength, avoid occurring coming unglued in use, come off, ensure product it is reliable,
Stable, sealing effectiveness is preferable, resistance to pressure is preferable, service life is longer.
To achieve these goals, the technical solution of the utility model is：A kind of highly reliable high stable ultrasonic flow rate sensing
Device, including shell, it is characterised in that：Shell upper surface cavity forms step, the hat brim of block with lower surface cavity connecting portion
It is pressed on the step；Piezo ceramic element, elastic rubber fitting and block and connecting line are arranged in shell；Piezo ceramic element two
Pad is located in the monosymmetric groove of block, and piezo ceramic element connecting line is drawn by the symmetrical lead groove on block both sides
Go out, the piezo ceramic element connecting line of extraction is located in block centre bore, is sealed in by sealant layer in shell；Shell upper end
Buckle is set on cavity inner round wall, block by snap lock in shell, shell lower end outside wall with outside the cavity of shell upper end
Side wall junction is provided with the platform for accommodating sealing ring.
In the above-mentioned technical solutions, buckle has two or more, and two or more buckles are symmetricly set in shell upper end
On cavity inner round wall.
In the above-mentioned technical solutions, shell is spear material integrative-structure.
In the above-mentioned technical solutions, it is provided with glue-line between piezo ceramic element negative electricity pole-face and outer casing bottom；Piezoelectricity is made pottery
Elastic rubber fitting is clamped between the anode electrode face of porcelain element and block.
The utility model has the following advantages that：
(1) piezo ceramic element electrode material from molecule silver, electrode and porcelain body adhesive force are extremely strong, resonance impedance be worth it is small,
Uniformity is good, and solderability is good；The processing of electrode surface cleanliness factor：To piezo ceramic element cleaning treatment before bonding, soaked using acetone
Bubble, surface and oil contaminant, dust, organic matter and inorganic matter are removed, improve bonding plane cleanliness factor, improve electrode surface adhesive force；Shell glues
Junction pre-processes：Blasting treatment is used to bonding plane, forms the rough surface with keying action, increases mechanical interlock power, is led to
Cross bonded adhesives formation electrode surface to be connected with the lockmaking of shell bonding plane, electrode surface and shell are greatly improved using above-mentioned technique for sticking
Firmness is bonded, avoids occurring coming unglued in use, come off, ensures the reliable, stably of product；
(2) there are 2 or more buckles by block locking in shell by increasing on shell inner round wall, block, piezoelectricity
Ceramic component, shell shape are integral, and clamp position is formed to piezo ceramic element, and block applies certain to piezo ceramic element
Pretightning force, it further avoid sensor and occur coming unglued and failing in use, improve sensor stability, reliability, simultaneously
Improve efficiency of assembling；
(3) elastic rubber fitting is clamped between piezo ceramic element and block, effectively discharges sensor by external pressure, temperature
And caused internal stress under the environment such as expand with heat and contract with cold, improve sensitivity and the reliability of sensor；
(4) shell upper surface cavity forms step with lower surface cavity connecting portion, and the hat brim of block is just pressed in step
On, the depth of block insertion enclosure cavity is effectively controlled, ensures the uniformity of adhesive-layer thickness, the monosymmetric groove of block will
Bonded adhesives can be filled up, the bonded adhesives after solidification wraps whole piezo ceramic element, effectively improves piezo ceramic element and shell
The bonding firmness of adhesive surface, improve the stability of sensor reliability and output waveform.
Brief description of the drawings
Fig. 1 is the utility model structure diagram.
Fig. 2 is the utility model block, groove, wire casing structure schematic diagram.
1- shells in figure, 2- glue-lines, 3- metallic channels, 4- grooves, 5- blocks, 6- buckles, 7- elastic rubber fittings, 8- fluid sealants
Layer, 9- piezo ceramic elements, 10- wiring, 11- accommodate the platform of sealing ring.
Embodiment
Describe performance of the present utility model in detail below in conjunction with the accompanying drawings, but they are not formed to of the present utility model
Limit, it is only for example.The advantages of making the utility model by explanation simultaneously, is more clear and is readily appreciated that.
Understood refering to accompanying drawing：A kind of highly reliable high stable ultrasonic flow transducer, including shell 1, it is characterised in that：Shell
1 upper surface cavity forms step with lower surface cavity connecting portion, and the hat brim of block 5 is pressed on the step, effectively control lid
Cap inserts the depth of enclosure cavity, ensures the uniformity of adhesive-layer thickness, and the monosymmetric groove of block will fill up bonded adhesives,
Bonded adhesives after solidification wraps whole piezo ceramic element, can also effectively improve piezoelectric ceramics firmness Nian Jie with shell, carry
The stability of high sensor reliability and output waveform；Piezo ceramic element 9, elastic rubber fitting 7 and block 5 and connecting line 10 are set
In in shell 1；9 liang of pads of piezo ceramic element are located in the monosymmetric groove 4 of block 5, piezo ceramic element connecting line
10 are drawn (as shown in Figure 1 and Figure 2) by the symmetrical lead groove 3 on the both sides of block 5, the piezo ceramic element connecting line of extraction 10
In the centre bore of block 5, it is sealed in by sealant layer 8 in shell 1；Buckle 6, lid are set on the upper end cavity inner round wall of shell 1
Cap 5 is lock onto in shell 1 by buckle 6, and the lower end outside wall of shell 1 is provided with receiving with shell upper end cavity lateral wall junction
The platform 11 (as shown in Figure 1) of sealing ring, by playing better seal effect to being extruded with for upper end platform.Buckle 6 has two
Individual or multiple, two or more buckles 6 are symmetricly set on the upper end cavity inner round wall of shell 1, and block is lock onto in shell,
Block applies certain pretightning force and shell to piezo ceramic element and forms clamp position to piezo ceramic element, further avoid
Coming unglued and failing occur in use in sensor, ensures the high reliability of product, improves efficiency of assembling.Shell 1 is spear material one
Structure.Glue-line 2 is provided between the negative electricity pole-face of piezo ceramic element 9 and the bottom of shell 1；The anode electrode of piezo ceramic element 9
Elastic rubber fitting 7 is clamped between face and block 5.Effectively release sensor produces under by external pressure, temperature and the environment such as expand with heat and contract with cold
Raw internal stress, improve the reliability of ultrasonic flow transducer.
A kind of preparation method of highly reliable high stable ultrasonic flow transducer described in the utility model comprises the following steps：
Piezo ceramic element electrode material makes piezo ceramic element electrode and porcelain body adhesive force extremely strong, resonance impedance value from molecule silver
It is small, uniformity is good, solderability is good；It is clear to piezo ceramic element before bonding to the processing of piezo ceramic element electrode surface cleanliness factor
Processing is washed, is no less than 30 minutes using acetone soak, removes surface and oil contaminant, dust, organic matter and inorganic matter；Shell bonding plane is pre-
Processing：Blasting treatment is used to bonding plane, forms the rough surface with keying action, increases mechanical interlock power, passes through bonding
Glue forms electrode surface and is connected with the lockmaking of shell bonding plane；Shell carries out plasma treatment, increase material surface activity before using；
Shell upper surface cavity is set to form step with lower surface cavity connecting portion, the hat brim of block is pressed on step；In shell inner circle
Increase has two or more buckle by block locking in shell on wall, makes block, piezo ceramic element, shell formation one whole
Body；Elastic rubber fitting is clamped between piezo ceramic element and block；Two pads of piezo ceramic element are directly embedded to block
In monosymmetric groove, piezo ceramic element connecting line is drawn by the monosymmetric metallic channel of block, and block passes through buckle
It is locked in shell, the connecting line of extraction is inserted directly into block centre bore, then is sealed in by sealant layer in shell (as schemed
Shown in 1), electrode surface and shell adhesive strength are improved, avoids occurring coming unglued in use, come off, effectively control bondline thickness, is protected
Demonstrate,prove resonance impedance uniformity and optimal adhesive effect, ensure product it is reliable, stably, service life length.
In order to more clearly illustrate a kind of highly reliable high stable ultrasonic flow transducer described in the utility model
With existing traditional arrangement, Application No. 201610542465.9, patent name are《A kind of ultrasonic flow transducer structure
And its method for assembling and positioning》, Application No. 02106676.0, patent name are《Ultrasonic sensor, manufacture ultrasonic sensor
Method and ultrasonic flowmeter》, Application No. 201621083769.5, patent name are《A kind of ultrasonic flow sensor》
Compared to possessed advantage, staff is contrasted this five kinds of technical schemes, its comparing result such as following table：
As seen from the above table, a kind of highly reliable high stable ultrasonic flow transducer described in the utility model with it is existing traditional
Arrangement, Application No. 201610542465.9, patent name are《A kind of ultrasonic flow transducer structure and its assembling positioning
Method》, Application No. 02106676.0, patent name are《Ultrasonic sensor, the method and ultrasound for manufacturing ultrasonic sensor
Low》, Application No. 201621083769.5, patent name are《A kind of ultrasonic flow sensor》Compare, sensitivity
High, output waveform stabilization, sensor reliability are higher.
Other unaccounted parts belong to prior art.
Claims (4)
1. a kind of highly reliable high stable ultrasonic flow transducer, including shell (1), it is characterised in that：Shell (1) upper surface cavity
Step is formed with lower surface cavity connecting portion, the hat brim of block (5) is pressed on the step；Piezo ceramic element (9), elasticity
Rubber cushion (7) and block (5) and connecting line (10) are arranged in shell (1)；The pad of piezo ceramic element (9) two is located at block
(5) in monosymmetric groove (4), piezo ceramic element connecting line (10) is drawn by the symmetrical lead groove (3) on block (5) both sides
Go out, the piezo ceramic element connecting line (10) of extraction is located in block (5) centre bore, and shell is sealed in by sealant layer (8)
(1) in；Buckle (6) is set on the cavity inner round wall of shell (1) upper end, and block (5) is lock onto in shell (1) by buckle (6), outside
Shell (1) lower end outside wall is provided with the platform (11) for accommodating sealing ring with shell (1) upper end cavity lateral wall junction.
A kind of 2. highly reliable high stable ultrasonic flow transducer according to claim 1, it is characterised in that：Buckle (6) has
Two or more, two or more buckles (6) are symmetricly set on the cavity inner round wall of shell (1) upper end.
A kind of 3. highly reliable high stable ultrasonic flow transducer according to claim 1 or 2, it is characterised in that：Shell (1)
For spear material integrative-structure.
A kind of 4. highly reliable high stable ultrasonic flow transducer according to claim 3, it is characterised in that：Piezoelectric ceramics
Glue-line (2) is provided between part (9) negative electricity pole-face and shell (1) bottom；The anode electrode face of piezo ceramic element (9) and block
(5) elastic rubber fitting (7) is clamped between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721110449.9U CN207147569U (en) | 2017-08-31 | 2017-08-31 | A kind of highly reliable high stable ultrasonic flow transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721110449.9U CN207147569U (en) | 2017-08-31 | 2017-08-31 | A kind of highly reliable high stable ultrasonic flow transducer |
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| Publication Number | Publication Date |
|---|---|
| CN207147569U true CN207147569U (en) | 2018-03-27 |
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ID=61676739
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721110449.9U Active CN207147569U (en) | 2017-08-31 | 2017-08-31 | A kind of highly reliable high stable ultrasonic flow transducer |
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| Country | Link |
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| CN (1) | CN207147569U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844820A (en) * | 2018-05-07 | 2018-11-20 | 武汉科技大学 | A kind of prestressed, reinforced self-test anchor ring based on the offset of Piezoelectric Impedance characteristic frequency |
| CN112097124A (en) * | 2020-08-31 | 2020-12-18 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Novel infrasonic wave sensor that structure is strengthened |
| CN114101019A (en) * | 2022-01-26 | 2022-03-01 | 青岛鼎信通讯股份有限公司 | Ultrasonic transducer applied to water meter |
-
2017
- 2017-08-31 CN CN201721110449.9U patent/CN207147569U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844820A (en) * | 2018-05-07 | 2018-11-20 | 武汉科技大学 | A kind of prestressed, reinforced self-test anchor ring based on the offset of Piezoelectric Impedance characteristic frequency |
| CN112097124A (en) * | 2020-08-31 | 2020-12-18 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Novel infrasonic wave sensor that structure is strengthened |
| CN112097124B (en) * | 2020-08-31 | 2022-07-08 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Novel infrasonic wave sensor that structure is strengthened |
| CN114101019A (en) * | 2022-01-26 | 2022-03-01 | 青岛鼎信通讯股份有限公司 | Ultrasonic transducer applied to water meter |
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