CN105181044A - Ultrasonic flowmeter - Google Patents
Ultrasonic flowmeter Download PDFInfo
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- CN105181044A CN105181044A CN201510250331.5A CN201510250331A CN105181044A CN 105181044 A CN105181044 A CN 105181044A CN 201510250331 A CN201510250331 A CN 201510250331A CN 105181044 A CN105181044 A CN 105181044A
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Abstract
The invention discloses an ultrasonic flowmeter which belongs to the technical field of fluid flow measuring equipment. The flowmeter comprises an outer housing. A flowmeter head is arranged outside the outer housing. The inner part of the outer housing is coaxially provided with an inner housing. A flow gap is arranged between the outer housing and the inner housing. Two ends of the flow gap are respectively provided with a first reflector plate and a second reflector plate. The first reflector plate and the second reflector plate are respectively provided with flow channels which extend axially, wherein the number of the flow channels on the first reflector plate is same with that of the flow channels on the second reflector plate. The flow channels on the first reflector and the second reflector which are arranged oppositely are coaxially arranged. The end of the first reflector plate is provided with a first reflection oblique surface which is conically arranged. The end of the second reflector plate is provided with a second reflection oblique surface which is conically arranged. A first probe and a second probe are separately arranged on the outer housing. The first probe and the second probe are connected with the flowmeter head. The ultrasonic flowmeter overcomes technical problems of low measurement precision and no wide enough measurement range in a time-difference-method ultrasonic flowmeter. The ultrasonic flowmeter provided by the invention can be widely applied in measurement for the flow speed of the fluid.
Description
Technical field
The present invention relates to a kind of flowmeter, relate more particularly to a kind of closed conduct ultrasonic flow meter, belong to measurement of fluid flow equipment technical field.
Background technology
Due to leakproofness and can not perspectivity, the flow of the fluid in closed conduct cannot known to the external world.As measuring method the most simply, the flow velocity of usual measurable flow body, then calculates the flow of fluid according to the diameter of pipeline.Here in method, common method uses non-contact measurement, and the most frequently used instrument is exactly ultrasonic flow meter.
The basic functional principle of ultrasonic flow meter is as follows: the information being just loaded with rate of flow of fluid when ultrasound wave is propagated in the fluid flowed, therefore, just can be detected the flow velocity of fluid, thus be converted into flow by the ultrasound wave received.In the method, ultrasonic pulse arrives another sensor through pipeline from a sensor, when fluid does not flow, sound pulse is with the identical speed (velocity of sound, C) propagate in the two directions, if ducted fluid has certain flow rate V (this flow velocity is not equal to zero), then the sound pulse along flow direction can be transmitted hurry up, and the sound pulse in reverse flow direction can be transmitted more slowly.So, the following current transmission time can be slightly short, and the countercurrent time can be slightly long.Certainly, length mentioned here or short be all transmission time when not flowing with fluid Comparatively speaking.
And according to different detection methods, the ultrasonic flow meter that ultrasonic flow meter can be divided into again propagation speed differential method, Doppler method, beam deviation method, Noise Method and correlation method etc. dissimilar.In these all ultrasonic flow meters, the simplest with Noise Method theory and structure, be convenient to measure and carry, low price but accuracy is lower, the occasion be particularly suitable for flow measurement accuracy requirement is not high uses.
In reality, the most conventional with the ultrasonic flow meter of time difference principle, it utilizes the relation of the difference in travel-time and tested flow velocity to ask for flow velocity, and then obtains outflow.Such flowmeter has multiple advantage, the such as life-span is long, crushing is low, long-time running is stable, reliability is high, also just because of these advantages, thus be widely used in the liquid meter field of the industries such as urban water supply and sewerage, oil, chemical industry, pharmacy, metallurgy and electric power.But such flowmeter also exists certain defect, such as measuring accuracy is low, measurement range is not high, and this is also the current technical issues that need to address always.
For the foregoing reasons, because the various ultrasonic flow meters existed in prior art still more or less exist some defects, and in real world applications, also demand is existed for Novel ultrasonic low.Therefore, for a kind of novel ultrasonic flow meter of exploitation, to change traditional version, not only there is urgent researching value, also there are good economic benefit and commercial Application potentiality, this just the power place that is accomplished of the present invention and basis lean on.
Summary of the invention
In order to overcome the defect of above-mentioned pointed existing ultrasonic flow meter, the present inventor, to this has been further investigation, after having paid a large amount of creative work, thus completes the present invention.
Specifically, technical matters to be solved by this invention is: provide a kind of ultrasonic flow meter, the technical matters that transit time ultrasonic flow meters measuring accuracy is not high to solve, measurement range is wideless etc.
For solving the problems of the technologies described above, technical scheme of the present invention is: provide a kind of ultrasonic flow meter, described ultrasonic flow meter comprises the shell body that tubular is arranged, the outer setting of described shell body has gauge outfit, the inside of described shell body is coaxially arranged with inner housing, passage gaps is provided with between described shell body and inner housing, the two ends of described passage gaps are respectively equipped with the first reflector plate and the second reflector plate, described first reflector plate and the second reflector plate are tubular structure and are fixed between described shell body and inner housing, described first reflector plate and axially extended circulation passage identical with the second reflector plate being equipped with quantity, circulation passage on relative described first reflector plate and the circulation passage on described second reflector plate are all coaxially arranged, the end of described first reflector plate is provided with the first reflecting slant of taper setting, the end of described second reflector plate is provided with the second reflecting slant of taper setting, described first reflecting slant and the second reflecting slant are oppositely arranged, described shell body is interval with two Measurement channel, the first probe and the second probe is separately installed with in described Measurement channel, described first probe is near described first reflector plate and towards described first reflecting slant, described second probe is near described second reflector plate and towards described second reflecting slant, described first probe is all connected described gauge outfit with the second probe.
In described ultrasonic flow meter of the present invention, as the preferred technical scheme of one, described inner housing is provided with axially extended adjustment passage, the spool adjusting described adjustment channel cross-sectional flow area is provided with in described adjustment passage, described spool connects valve rod, described valve rod passes described inner housing and rotates and is installed on described shell body, is provided with the stop mechanism limiting described valve rod and rotate between described valve rod and shell body.
In described ultrasonic flow meter of the present invention, as the preferred technical scheme of one, described stop mechanism comprises some blind holes that annular array is arranged at described valve stem end, described shell body is provided with the mounting hole corresponding with described blind hole position, the steel ball suitable with described blind hole is provided with in described mounting hole, described steel ball connects a Compress Spring, and described Compress Spring to be arranged in described mounting hole and to rely on an adjustment screw, and described adjustment screw thread is connected on described shell body.
In described ultrasonic flow meter of the present invention, as the preferred technical scheme of one, described valve rod is provided with the position transducer for recording described spool incident angle away from one end of described blind hole, and described position transducer connects described gauge outfit.
In described ultrasonic flow meter of the present invention, as the preferred technical scheme of one, one end near described blind hole on described valve rod is provided with handle, described handle stretches out described shell body, described shell body is provided with the cover body for covering described handle, described cover body is installed on described shell body by securing member, is provided with lead sealing between described cover body and shell body.
In described ultrasonic flow meter of the present invention, as the preferred technical scheme of one, the equal correspondence in end of described first probe and the second probe is provided with the knot screen for removing the impurity be attached on probe.
In described ultrasonic flow meter of the present invention, as the preferred technical scheme of one, described knot screen comprises the sleeve be arranged in described passage gaps, described sleeve open at one end, the other end is fixedly installed on described inner housing, be slidably fitted with magnetic piston in described sleeve edge, described sleeve is provided with some through holes near one end of described inner housing; Described spool is provided with permanent magnet.
In described ultrasonic flow meter of the present invention, as the preferred technical scheme of one, described permanent magnet and described spool are set to one.
In described ultrasonic flow meter of the present invention, as the preferred technical scheme of one, on described shell body, also interval is provided with the 3rd probe and the 4th probe, described 3rd probe and the 4th is popped one's head in and to be arranged on same bus and to stagger phase place with the described first place bus of popping one's head in, described 3rd probe is near described first reflector plate and towards described first reflecting slant, described 4th probe is near described second reflector plate and towards described second reflecting slant, and described 3rd probe is all connected described gauge outfit with the 4th probe.
In described ultrasonic flow meter of the present invention, as the preferred technical scheme of one, the equal correspondence in end of described 3rd probe and the 4th probe is provided with described knot screen.
After have employed technique scheme, described ultrasonic flow meter of the present invention achieves multiple beneficial effect, such as:
(1) because the circulation passage on the first relative reflector plate and the circulation passage on the second reflector plate are all coaxially arranged, serve good rectified action, thus improve the measuring accuracy of ultrasonic flow meter.
(2) because inner housing is provided with axially extended adjustment passage, the spool of adjustment adjustment channel cross-sectional flow area is provided with in adjustment passage, can by the circulation area of alter, the flow velocity of alter, this also just changes the flow of the fluid flowing through passage gaps accordingly, the scope also corresponding change of measurement.
(3) because stop mechanism adopts Compress Spring and the adjustment screw of steel ball connection; overload protective function is served to ultrasonic flow meter; when in pipeline, the excessive flow velocity of the pressure of fluid is higher; exceed the acting force of Compress Spring; steel ball just compresses Compress Spring, and spool is out of trim just, and band ovable valve stem rotates; circulation area is increased, reduces flow velocity.
(4) owing to being slidably fitted with magnetic piston in sleeve edge; spool is provided with permanent magnet; when permanent magnet is along with valve core rotation; a magnetic force can be applied to of a magnetic piston end face; this magnetic force can drive magnetic piston to reciprocatingly slide; by the liquid ejection in sleeve; spray to the first probe or the second probe; so just can by the first probe and the upper Impurity removal adhered to of the second probe; this structure can on-line cleaning first be popped one's head in and the second probe; need not shut down, also need not dismantle ultrasonic flow meter, simple.
(5) owing to being also provided with the 3rd probe and the 4th probe all connecting gauge outfit, thus achieve two-channel metering system, overcome the flow measurement error that flow velocity disturbance brings, further increase measuring accuracy.
As mentioned above, the invention provides a kind of ultrasonic flow meter, it is by multiple employing of unique technology feature and the design of structure, thus achieve multiple excellent effect, technological deficiency of the prior art can be solved, thus industrially there is good application potential and actual production prospect, and there is good market-oriented prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the ultrasonic flow meter of the embodiment of the present invention;
Fig. 2 is the schematic top plan view of the ultrasonic flow meter of Fig. 1;
Fig. 3 is the structural representation of A-A in the ultrasonic flow meter of Fig. 1;
Fig. 4 is the structural representation of B-B in Fig. 3;
Fig. 5 is the structure enlarged diagram of C in Fig. 3;
Fig. 6 is the structure enlarged diagram of D in Fig. 3;
Fig. 7 is the cross section enlarged diagram of E-E in Fig. 6;
Wherein, in Fig. 1 to Fig. 7, each number designation refers to following concrete meaning, element and/or parts respectively.
In figure: 1, shell body, 2, gauge outfit, 3, inner housing, 4, passage gaps, the 5, second reflector plate, 6, circulation passage, the 7, spool, 8, first probe, the 9, second probe, 10, the 3rd probe, the 11, the 4th probe, 12, position transducer, 13, valve rod, 14, the first reflector plate, the 15, first reflecting slant, the 16, second reflecting slant, 17, adjustment screw, 18, Compress Spring, 19, steel ball, 20, blind hole, 21, handle, 22, cover body, 23, lead sealing, 24, sleeve, 25, magnetic piston.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.But the purposes of these exemplary embodiments and object are only used for exemplifying the present invention, not any type of any restriction is formed to real protection scope of the present invention, more non-protection scope of the present invention is confined to this.
Embodiment 1
As Fig. 1 to Fig. 7 jointly shown in, a kind of ultrasonic flow meter disclosed in the present invention, comprise the shell body 1 that tubular is arranged, the outer setting of shell body 1 has gauge outfit 2, control and conversion chip is provided with in gauge outfit 2, these are consistent with traditional principle, do not repeat them here, the inside of shell body 1 is coaxially arranged with inner housing 3, inner housing 3 is also set to linearly extended rotary structure, passage gaps 4 is provided with between shell body 1 and inner housing 3, passage gaps 4 is equidistantly arranged, the two ends of passage gaps 4 are respectively equipped with the first reflector plate 14 and the second reflector plate 5, first reflector plate 14 and the second reflector plate 5 are tubular structure and are fixed between shell body 1 and inner housing 3, the outside surface of the first reflector plate 14 and the second reflector plate 5 is all fixed on the inwall of shell body 1, the inside surface of the first reflector plate 14 and the second reflector plate 5 is all fixed on the outer wall of inner housing 3, first reflector plate 14 and axially extended circulation passage 6 identical with the second reflector plate 5 being equipped with quantity, circulation passage 6 on the first relative reflector plate 14 and the circulation passage 6 on the second reflector plate 5 are all coaxially arranged, serve good rectified action, the end of the first reflector plate 14 is provided with the first reflecting slant 15 of taper setting, the end of the second reflector plate 5 is provided with the second reflecting slant 16 of taper setting, first reflecting slant 15 and the second reflecting slant 16 are oppositely arranged, shell body 1 is interval with two Measurement channel, the first probe 8 and the second probe 9 is separately installed with in Measurement channel, first probe 8 is near the first reflector plate 14 and towards the first reflecting slant 15, second probe 9 is near the second reflector plate 5 and towards the second reflecting slant 16, first probe 8 is all connected gauge outfit 2 with the second probe 9.Freeze at low temperatures to prevent the liquid in Measurement channel, when 8 and the second probe 9 are popped one's head in installation first, the end of the first probe 8 and the second probe 9 is at least flushed with the inwall of shell body 1, the first probe 8 and the second probe 9 can be made so always to have fluid flushing, can not freeze, or extend in passage gaps 4 a little, certainly, be good to flush effect, because once the distance of stretching out the inwall of shell body 1 is excessive, then also can produce eddy current, affect measurement effect.
Inner housing 3 is provided with axially extended adjustment passage, the spool 7 of adjustment adjustment channel cross-sectional flow area is provided with in adjustment passage, spool 7 is in disc shaped structure, the swing of spool 7 can change the circulation area of adjustment passage, spool 7 connects valve rod 13, valve rod 13 passes inner housing 3 and rotates and is installed on shell body 1, the stop mechanism limiting valve rod 13 and rotate is provided with between valve rod 13 and shell body 1, valve rod 13 can be fixed on a certain position by stop mechanism, thus make the circulation area between spool 7 and adjustment passage certain, so just change the circulation area of fluid, thus change the flow velocity of fluid, circulation area increases, the flow velocity of fluid reduces, otherwise, circulation area reduces, the flow velocity of fluid then increases, this also just changes the flow of the fluid flowing through passage gaps 4 accordingly, the scope also corresponding change of measuring.
Stop mechanism comprises some blind holes 20 that annular array is arranged at valve rod 13 end, shell body 1 is provided with the mounting hole corresponding with blind hole 20 position, the steel ball 19 suitable with blind hole 20 is provided with in mounting hole, steel ball 19 connects a Compress Spring 18, Compress Spring 18 to be arranged in mounting hole and to rely on an adjustment screw 17, and adjustment screw 17 is threadedly connected on shell body 1.
Valve rod 13 is provided with the position transducer 12 for recording spool 7 incident angle away from one end of blind hole 20, and position transducer 12 connects gauge outfit 2, when adjusting spool 7 position, can demonstrate circulation area intuitively by position transducer 12, is convenient to adjustment.
One end near blind hole 20 on valve rod 13 is provided with handle 21, and handle 21 stretches out shell body 1, and shell body 1 is provided with the cover body 22 for covering handle 21, and cover body 22 is installed on shell body 1 by securing member, is provided with lead sealing 23 between cover body 22 and shell body 1.Adjustment valve rod 13 needs to open lead sealing 23, and the object of lead sealing 23 prevents user from carelessly adjusting, and valve rod 13 generally infrequently adjusts, and just adjusts when needs change flow.
Embodiment 2
As Fig. 1 to Fig. 7 jointly shown in, a kind of ultrasonic flow meter disclosed in the present invention, its structure is substantially identical with embodiment one, its difference is, the equal correspondence in end of the first probe 8 and the second probe 9 is provided with the knot screen for removing the impurity be attached on probe, knot screen comprises the sleeve 24 be arranged in passage gaps 4, the cross sectional shape of sleeve 24 is fusiformis, the air line distance of sleeve 24 on the fluid flow direction of passage gaps 4 be greater than passage gaps 4 perpendicular to circulation flow direction on air line distance, avoid fluid to be impacted, affect measurement effect, sleeve 24 open at one end, the other end is fixedly installed on inner housing 3, sleeve 24 is slidably fitted with magnetic piston 25 along interior, sleeve 24 is provided with some through hole (not shown)s near one end of inner housing 3, back pressure is produced when sliding to inner housing 3 to prevent magnetic piston 25, make magnetic piston 25 can shift to inner housing 3 smoothly, spool 7 is provided with permanent magnet, and permanent magnet and spool 7 are set to one, and that is, spool 7 is that permanent magnet material is made.When permanent magnet rotates along with spool 7; a magnetic force can be applied to of magnetic piston 25 end face; this magnetic force can drive magnetic piston 25 to reciprocatingly slide; by the liquid ejection in sleeve 24, spray to the first probe 8 or the second probe 9, so just can by the Impurity removal of attachment on the first probe 8 and the second probe 9; this structure can on-line cleaning first pop one's head in 8 and second probe 9; need not shut down, also need not dismantle ultrasonic flow meter, simple.After having cleaned, the position of adjustment spool 7, the position of permanent magnet is just fixed, and now magnetic piston 25 also can find an equilibrium point, and position is also fixed.
Embodiment 3
As Fig. 1 to Fig. 7 jointly shown in, a kind of ultrasonic flow meter disclosed in the present invention, its structure is substantially identical with embodiment two, its difference is, on shell body 1, also interval is provided with the 3rd probe 10 and the 4th probe 11, 3rd probe 10 and the 4th probe 11 to be arranged on same bus and to stagger phase place with the first 8 place buses of popping one's head in, as for phase shifting angle, relevant with measurement range with shell body 1 diameter, those skilled in the art can set according to professional knowledge, 3rd probe 10 is near the first reflector plate 14 and towards the first reflecting slant 15, 4th probe 11 is near the second reflector plate 5 and towards the second reflecting slant 16, 3rd probe 10 is all connected gauge outfit 2 with the 4th probe 11.The equal correspondence in end of the 3rd probe 10 and the 4th probe 11 is provided with knot screen, and knot screen is introduced in detail in embodiment two, does not repeat them here.This two-channel metering system, further increases measuring accuracy.
Certainly, for above design, according to the change of shell body 1 diameter, also can adopt the multichannel quadraphonic or the more flow measurement error brought to overcome flow velocity disturbance of multichannel, its mounting means can with reference to above structure, in this citing that differs.
The present invention does not change in principle of work, identical with traditional transit time ultrasonic flow meters, but by the change of technical solution of the present invention, substantially increase the measuring accuracy of ultrasonic flow meter, and can by changing the circulation area of adjustment passage, change flow velocity and flow, expanded the measurement range of ultrasonic flow meter, made the usable range of this ultrasonic flow meter more extensive.
Should be appreciated that the purposes of these embodiments is only not intended to for illustration of the present invention limit the scope of the invention.In addition; also should understand; after having read technology contents of the present invention, those skilled in the art can make various change, amendment and/or modification to the present invention, and these all equivalent form of values fall within the protection domain that the application's appended claims limits equally.
Claims (10)
1. a ultrasonic flow meter, comprise the shell body that tubular is arranged, the outer setting of described shell body has gauge outfit, it is characterized in that: the inside of described shell body is coaxially arranged with inner housing, passage gaps is provided with between described shell body and inner housing, the two ends of described passage gaps are respectively equipped with the first reflector plate and the second reflector plate, described first reflector plate and the second reflector plate are tubular and are fixed between described shell body and inner housing, described first reflector plate and axially extended circulation passage identical with the second reflector plate being equipped with quantity, circulation passage on relative described first reflector plate and the circulation passage on described second reflector plate are all coaxially arranged, the end of described first reflector plate is provided with the first reflecting slant of taper setting, the end of described second reflector plate is provided with the second reflecting slant of taper setting, described first reflecting slant and the second reflecting slant are oppositely arranged, described shell body is interval with two Measurement channel, the first probe and the second probe is separately installed with in described Measurement channel, described first probe is near described first reflector plate and towards described first reflecting slant, described second probe is near described second reflector plate and towards described second reflecting slant, described first probe is all connected described gauge outfit with the second probe.
2. ultrasonic flow meter as claimed in claim 1, it is characterized in that: described inner housing is provided with axially extended adjustment passage, the spool adjusting described adjustment channel cross-sectional flow area is provided with in described adjustment passage, described spool connects valve rod, described valve rod passes described inner housing and rotates and is installed on described shell body, is provided with the stop mechanism limiting described valve rod and rotate between described valve rod and shell body.
3. ultrasonic flow meter as claimed in claim 1 or 2, it is characterized in that: described stop mechanism comprises some blind holes that annular array is arranged at described valve stem end, described shell body is provided with the mounting hole corresponding with described blind hole position, the steel ball suitable with described blind hole is provided with in described mounting hole, described steel ball connects a Compress Spring, described Compress Spring to be arranged in described mounting hole and to rely on an adjustment screw, and described adjustment screw thread is connected on described shell body.
4. as claimed in claim 2 or claim 3 ultrasonic flow meter, is characterized in that: described valve rod is provided with the position transducer for recording described spool incident angle away from one end of described blind hole, and described position transducer connects described gauge outfit.
5. the ultrasonic flow meter as described in any one of claim 2-4, it is characterized in that: the one end near described blind hole on described valve rod is provided with handle, described handle stretches out described shell body, described shell body is provided with the cover body for covering described handle, described cover body is installed on described shell body by securing member, is provided with lead sealing between described cover body and shell body.
6. the ultrasonic flow meter as described in any one of claim 2-5 as described in claim, is characterized in that: the equal correspondence in end of described first probe and the second probe is provided with the knot screen for removing the impurity be attached on probe.
7. ultrasonic flow meter as claimed in claim 6, it is characterized in that: described knot screen comprises the sleeve be arranged in described passage gaps, described sleeve open at one end, the other end is fixedly installed on described inner housing, be slidably fitted with magnetic piston in described sleeve edge, described sleeve is provided with some through holes near one end of described inner housing; Described spool is provided with permanent magnet.
8. ultrasonic flow meter as claimed in claim 7, is characterized in that: described permanent magnet and described spool are set to one.
9. the ultrasonic flow meter as described in any one of claim 1-8 as described in claim, it is characterized in that: on described shell body, also interval is provided with the 3rd probe and the 4th probe, described 3rd probe and the 4th is popped one's head in and to be arranged on same bus and to stagger phase place with the described first place bus of popping one's head in, described 3rd probe is near described first reflector plate and towards described first reflecting slant, described 4th probe is near described second reflector plate and towards described second reflecting slant, and described 3rd probe is all connected described gauge outfit with the 4th probe.
10. ultrasonic flow meter as claimed in claim 9, is characterized in that: the equal correspondence in end of described 3rd probe and the 4th probe is provided with described knot screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510250331.5A CN105181044B (en) | 2015-05-15 | 2015-05-15 | A kind of ultrasonic flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510250331.5A CN105181044B (en) | 2015-05-15 | 2015-05-15 | A kind of ultrasonic flowmeter |
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| CN105181044A true CN105181044A (en) | 2015-12-23 |
| CN105181044B CN105181044B (en) | 2018-02-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113884155A (en) * | 2021-08-27 | 2022-01-04 | 泉州日新流量仪器仪表有限公司 | Flowmeter overload prevention device and flowmeter |
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| EP1065474A2 (en) * | 1999-07-01 | 2001-01-03 | Hydrometer GmbH | Ultrasonic flow counter with sound deviation |
| JP2003050144A (en) * | 2001-08-07 | 2003-02-21 | Fuji Electric Co Ltd | Ultrasonic flow-rate measurement apparatus |
| CN201269765Y (en) * | 2008-08-27 | 2009-07-08 | 威海市天罡仪表有限公司 | Ultrasonic flowmeter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113884155A (en) * | 2021-08-27 | 2022-01-04 | 泉州日新流量仪器仪表有限公司 | Flowmeter overload prevention device and flowmeter |
| CN113884155B (en) * | 2021-08-27 | 2023-09-01 | 泉州日新流量仪器仪表有限公司 | Overload prevention device of flowmeter and flowmeter |
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| CN105181044B (en) | 2018-02-27 |
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Inventor after: Chen Weigang Inventor after: He Xiangzhi Inventor after: Wang Qiuhong Inventor after: Ding Zhongwa Inventor before: He Xiangzhi Inventor before: Wang Qiuhong Inventor before: Ding Zhongwa |
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Effective date of registration: 20180110 Address after: Cangnan County Lingxi Town Industrial Park of Wenzhou city in Zhejiang Province Road 325000 Applicant after: ZHEJIANG TANCY INSTRUMENT SCIENCE & TECHNOLOGY CO., LTD. Address before: 310003 Hangzhou City, Hangzhou City, Zhejiang Province, Yan swallows building 3 house 1 unit 403 room Applicant before: He Xiangzhi |
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Address after: No. 198, Hualian Road, industrial park, Lingxi Town, Cangnan County, Wenzhou City, Zhejiang Province 325800 Patentee after: ZHEJIANG TANCY INSTRUMENT SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 325000 No.1 Industrial Park, Lingxi Town, Cangnan County, Wenzhou City, Zhejiang Province Patentee before: ZHEJIANG TANCY INSTRUMENT SCIENCE & TECHNOLOGY Co.,Ltd. |
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