CN103616095A - Double-sound-track ultrasonic heat meter - Google Patents
Double-sound-track ultrasonic heat meter Download PDFInfo
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- CN103616095A CN103616095A CN201310595958.5A CN201310595958A CN103616095A CN 103616095 A CN103616095 A CN 103616095A CN 201310595958 A CN201310595958 A CN 201310595958A CN 103616095 A CN103616095 A CN 103616095A
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Abstract
The invention discloses a double-sound-track ultrasonic heat meter. The ultrasonic heat meter comprises a tube body, four installing ports are formed in the wall of the tube body, an ultrasonic transducer is installed on each installing port, the four ultrasonic transducers are arranged opposite in pairs, each two opposite ultrasonic transducers form a sound track, the two sound tracks with axes mutually parallel and lengths equal are symmetrically distributed on the two sides of the axis of the tube body, and the distances between the axes of the two sound tracks and the axis of the tube body are equal. In this way, the ultrasonic transducers are basically arranged in the positions where a flow field velocity is very close to mean flow velocity of the water velocity on the cross section in a tube, correction difficulty of measurement errors by a computer matched with a flowmeter can be greatly reduced, and therefore a final measurement result is accurate.
Description
Technical field
The present invention relates to a kind of ultrasonic calorimeter, relate in particular to a kind of two-channel ultrasonic calorimeter.
Background technology
Heavy caliber ultrasonic calorimeter generally has dividing of monophony and multichannel.
Domestic heavy caliber ultrasonic calorimeter normally be take monophony as main, monaural major defect is the requirement that the fluid in requirement flowmeter survey chamber meets steady flow, inviscid flow, once there is skew or irregular in the velocity distribution in flow field, causes measuring accuracy greatly to decline and can not normally use.
The acoustic poth arrangement mode of other multichannel is fairly simple dividing equally, exactly the cross section of pipe is divided into trisection in diametric(al), the positional distance axis of sound channel is 0.167DN, this arrangement does not meet the mobile feature of fluid, bad for the occasion adaptive faculty that installation environment is bad, measuring accuracy does not improve significantly, and effect is bad.
Summary of the invention
The object of this invention is to provide the two-channel ultrasonic calorimeter that a kind of measuring accuracy and stability are high, convection cell adaptability is good.
The object of the invention is to be achieved through the following technical solutions:
Two-channel ultrasonic calorimeter of the present invention, comprise body, the wall of described body is provided with four installing ports, each installing port is separately installed with a ultrasonic transducer, four ultrasonic transducers are relative between two, form respectively a sound channel, the axis of two sound channels is parallel to each other, equal in length and be symmetrically distributed in the both sides of the axis of described body, and the axis of two sound channels equates apart from the distance of the axis of described body.
As seen from the above technical solution provided by the invention, the two-channel ultrasonic calorimeter that the embodiment of the present invention provides, because the wall of body is provided with four installing ports, each installing port is separately installed with a ultrasonic transducer, four ultrasonic transducers are relative between two, form respectively a sound channel, the axis of two sound channels is parallel to each other, equal in length and be symmetrically distributed in the both sides of the axis of described body, and the axis of two sound channels equates apart from the distance of the axis of described body, transducer is substantially arranged in flow field velocity and approaches very much in pipe on xsect on the mean flow rate position of water velocity like this, can greatly alleviate the correction difficulty of the calculating instrument supporting with flowmeter to measuring error, make finally to measure result more accurate, due to the different parts of ultrasonic wave propagation path through body xsect, the final like this flow velocity measuring is actual is the weighted mean value of body xsect diverse location flow velocity, more approaches actual average flow velocity, makes measurement result more accurately also more stable in addition.Through carrying out contrast test with the two-channel table of traditional mode, unmodified original measurement precision is better than the two-channel table of dividing equally greatly, the flow velocity in flow field is more smooth in the distribution of this point simultaneously, even if skew occurs velocity flow profile, also can meet the accuracy requirement of heat meter flow, improve the adaptability of ultrasonic calorimeter to different incoming flows, reduced installation requirement.
Accompanying drawing explanation
Fig. 1 a is the side structure schematic diagram of two-channel ultrasonic calorimeter of the present invention;
Fig. 1 b is the end face structure schematic diagram of two-channel ultrasonic calorimeter of the present invention;
Fig. 2 a is the theoretical sound channel end face schematic layout pattern of two-channel ultrasonic calorimeter of the present invention;
Fig. 2 b is the theoretical sound channel side schematic layout pattern of two-channel ultrasonic calorimeter of the present invention;
Fig. 3 is that the present invention is compared with the prior art test findings error curve diagram.
In figure:
1, transducer mount pad, 2, ultrasonic transducer assembly, 3, O RunddichtringO, 4, transducer friction top, 5, body, 6, flange, A, first ultrasonic transducer, B, second ultrasonic transducer, C, the 3rd ultrasonic transducer, D, the 4th ultrasonic transducer;
Embodiment
To be described in further detail the embodiment of the present invention below.
Two-channel ultrasonic calorimeter of the present invention, its preferably embodiment be:
Comprise body, the wall of described body is provided with four installing ports, each installing port is separately installed with a ultrasonic transducer, four ultrasonic transducers are relative between two, form respectively a sound channel, the axis of two sound channels is parallel to each other, equal in length and be symmetrically distributed in the both sides of the axis of described body, and the axis of two sound channels equates apart from the distance of the axis of described body.
The angle of the axis of two sound channels and the axis of described body is less than 90 degree.
From the end face of described body, each ultrasonic transducer protrudes into described inner cavity of pipe 1/4 to 1/3.
On the body at described installing port place, be welded with transducer mount pad, described ultrasonic transducer is loaded in described transducer mount pad.
Between described ultrasonic transducer and described transducer mount pad, be provided with O-ring seal, the collar extension of described transducer mount pad is equipped with flange.
Described O-ring seal is O type circle.
Flange is equipped with respectively at the two ends of described body, and the internal diameter of described body is less than the mouth diameters of described flange.Meet the requirement that promotes flow velocity and electronic circuit.
Described flange is inwardly provided with tapering undergauge from oral area, meets the mobile requirement of fluid, reduces crushing.
The diameter in described measurement chamber is less than latus rectum, coordinates the needs of electronic circuit, by the diameter in rational Area Ratio contract measurement chamber, guarantees that crushing is less than 15KPa under conventional flow simultaneously.Can expanded range ratio, expand the precision of Small flowrate measurement, adopt undergauge design, can improve the flow velocity of measuring in chamber, crushing is controlled in the scope of standard code.
Two-channel ultrasonic calorimeter of the present invention, first transducer and second transducer correlation, with in one plane, coaxially install; The 3rd transducer and the 4th transducer correlation, with in one plane, coaxially install; Two measurement planes are parallel with the axis of pipe fitting, and distance is equal, meets hydromechanical funtcional relationship.End face from described body; each transducer protrudes into inner cavity of pipe approximately 1/3; guarantee that the pit volume and the transducer protrusion inboard wall of tube body volume that between transducer and body, form reach balance; meet the flow-disturbing effect producing less; bubble can not be deposited in transducer face simultaneously, and measuring accuracy is not had a negative impact.Transducer mount pad, after Precision Machining, is inserted on body and welds, and technique is simple, cost is low, guarantees that the length of each sound channel, angle are consistent.
Specific embodiment:
As shown in Fig. 1 a, Fig. 1 b, 2a, 2b, on body, four inclined holes of Precision Machining, wherein coaxial between two; Take inclined hole as basis, on steel pipe, weld four transducer mount pads; Two at body by flange welding again; Ultrasonic transducer assembly is packed into wherein, cover transducer gland.
From the end face of described body, the first transducer is coaxial and relative with the second transducer, and the 3rd transducer is coaxial and relative with the 4th transducer; The signal of two sound channels is separate, is on the position of requirement.
Transducer assemblies is coaxially fixed in transducer mount pad, and push down and make relative displacement can not occur after the two assembling with gland, transducer assemblies includes O RunddichtringO in addition, makes flowmeter in measuring process, can there is not water or other fluid seepages, cause transducer water inlet to lose efficacy.
The course of work: the first transducer and the 3rd transducer are launched ultrasonic signal simultaneously, the second transducer and the 4th transducer receive simultaneously; Then the second transducer and the 4th transducer are launched ultrasonic signal simultaneously, and the first transducer and the 3rd transducer receive simultaneously.In having the working environment of current, can obtain ultrasonic signal in the mistiming of hydrostatic and stream water transmission, and then obtain water velocity and flow.
Advantage of the present invention is:
As shown in Figure 3, the present invention has greatly reduced streams and the pressure loss, these design sharpest edges are to have taken into full account the flow field velocity in measuring tube to distribute in addition, flow field velocity on its ultrasonic wave propagation path approaches the mean flow rate of water velocity on the interior xsect of measuring tube very much, so just can greatly alleviate the correction difficulty of the calculating instrument supporting with flowmeter to measuring error, make finally to measure result more accurate.The ultrasonic wave propagation path of this design is through the different parts of measuring tube xsect in addition, and the final like this flow velocity measuring is actual is the weighted mean value of measuring tube xsect diverse location flow velocity, more approaches actual average flow velocity; Simultaneously transducer because of flow-disturbing and the possibility of retaining bubble and affect measuring accuracy drop to minimumly, make measurement result more accurately also more stable.
The design's the conventional flow of calorimeter: more than minimum flow reaches 1:50, surpass domestic conventional calorimeter, greatly improved the measuring accuracy of low discharge.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (8)
1. a two-channel ultrasonic calorimeter, comprise body, it is characterized in that, the wall of described body is provided with four installing ports, each installing port is separately installed with a ultrasonic transducer, and four ultrasonic transducers are relative between two, forms respectively a sound channel, the axis of two sound channels is parallel to each other, equal in length and be symmetrically distributed in the both sides of the axis of described body, and the axis of two sound channels equates apart from the distance of the axis of described body.
2. two-channel ultrasonic calorimeter according to claim 1, is characterized in that, the angle of the axis of two sound channels and the axis of described body is less than 90 degree.
3. two-channel ultrasonic calorimeter according to claim 2, is characterized in that, from the end face of described body, each ultrasonic transducer protrudes into described inner cavity of pipe 1/4 to 1/3.
4. according to the two-channel ultrasonic calorimeter described in claim 1,2 or 3, it is characterized in that, on the body at described installing port place, be welded with transducer mount pad, described ultrasonic transducer is loaded in described transducer mount pad.
5. two-channel ultrasonic calorimeter according to claim 4, is characterized in that, between described ultrasonic transducer and described transducer mount pad, is provided with O-ring seal, and the collar extension of described transducer mount pad is equipped with transducer friction top.
6. two-channel ultrasonic calorimeter according to claim 5, is characterized in that, described O-ring seal is O type circle.
7. according to the two-channel ultrasonic calorimeter described in claim 1,2 or 3, it is characterized in that, flange is equipped with respectively at the two ends of described body, and the internal diameter of described body is less than the mouth diameters of described flange.
8. two-channel ultrasonic calorimeter according to claim 7, is characterized in that, described flange is inwardly provided with tapering undergauge from oral area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310595958.5A CN103616095A (en) | 2013-11-21 | 2013-11-21 | Double-sound-track ultrasonic heat meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310595958.5A CN103616095A (en) | 2013-11-21 | 2013-11-21 | Double-sound-track ultrasonic heat meter |
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| Publication Number | Publication Date |
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| CN103616095A true CN103616095A (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310595958.5A Pending CN103616095A (en) | 2013-11-21 | 2013-11-21 | Double-sound-track ultrasonic heat meter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596601A (en) * | 2014-12-25 | 2015-05-06 | 重庆川仪自动化股份有限公司 | Ultrasonic flow meter sensor with eight sound channels |
| CN106092229A (en) * | 2016-06-16 | 2016-11-09 | 浙江大学 | Useful signal Blind extracting method and apparatus for ultrasonic gas flowmeter |
| CN106872078A (en) * | 2017-04-21 | 2017-06-20 | 清华大学 | A kind of two-channel body for ultrasonic calorimeter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4157034A (en) * | 1975-09-20 | 1979-06-05 | Industrie-Werke Karlsruhe Augsburg Aktiengesellschaft | Electronic heat amount meter |
| CN201859030U (en) * | 2010-11-02 | 2011-06-08 | 石家庄长通电器有限公司 | Measurement tube section for transducer of ultrasonic heat meter |
| CN202092694U (en) * | 2011-06-02 | 2011-12-28 | 唐山汇中仪表股份有限公司 | Measuring pipe section for ultrasonic water meter and heat meter |
-
2013
- 2013-11-21 CN CN201310595958.5A patent/CN103616095A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4157034A (en) * | 1975-09-20 | 1979-06-05 | Industrie-Werke Karlsruhe Augsburg Aktiengesellschaft | Electronic heat amount meter |
| CN201859030U (en) * | 2010-11-02 | 2011-06-08 | 石家庄长通电器有限公司 | Measurement tube section for transducer of ultrasonic heat meter |
| CN202092694U (en) * | 2011-06-02 | 2011-12-28 | 唐山汇中仪表股份有限公司 | Measuring pipe section for ultrasonic water meter and heat meter |
Non-Patent Citations (1)
| Title |
|---|
| 刘强: "《高精度、低功耗双通道超声波流量计的研究与实现》", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596601A (en) * | 2014-12-25 | 2015-05-06 | 重庆川仪自动化股份有限公司 | Ultrasonic flow meter sensor with eight sound channels |
| CN106092229A (en) * | 2016-06-16 | 2016-11-09 | 浙江大学 | Useful signal Blind extracting method and apparatus for ultrasonic gas flowmeter |
| CN106092229B (en) * | 2016-06-16 | 2018-12-04 | 浙江大学 | For the useful signal Blind extracting method and apparatus of ultrasonic gas flowmeter |
| CN106872078A (en) * | 2017-04-21 | 2017-06-20 | 清华大学 | A kind of two-channel body for ultrasonic calorimeter |
| CN106872078B (en) * | 2017-04-21 | 2024-02-27 | 清华大学 | Double-channel pipe body for ultrasonic heat meter |
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Application publication date: 20140305 |