CN103791953A - High-precision integrated nuclear Venturi tube - Google Patents
High-precision integrated nuclear Venturi tube Download PDFInfo
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- CN103791953A CN103791953A CN201310205081.4A CN201310205081A CN103791953A CN 103791953 A CN103791953 A CN 103791953A CN 201310205081 A CN201310205081 A CN 201310205081A CN 103791953 A CN103791953 A CN 103791953A
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Abstract
The invention discloses a high-precision integrated nuclear Venturi tube and belongs to the field of fluid measurement. The high-precision integrated nuclear Venturi tube at least comprises an upstream straight segment, a Venturi tube body, a downstream segment, an equalizing ring, and a nozzle. The segments of the Venturi tube are all integrated forgings, and the integrated Venturi tube body is formed. An inlet round segment, a conical shrunk segment, a throat, and a conical expanded segment of the Venturi tube body are integrally forged and finished; a pressure hose is omitted; meanwhile, the quick-wearing part, which quickly wears due to impact, namely the connection of the conical shrunk segment and the throat is subjected to overlaying with hard wearable material; accordingly, the defects that segment rolling and welding of the prior Venturi tube with steel plates causes welding deformation, welding dislocation, welding safety hazards, after-welding failure of machining, misalignment of the segments, quick wearing from impact, short service life and the like are overcome. Therefore, the structural strength of the high-precision integrated nuclear Venturi tube is improved, the coaxiality and safety of the segments is improved, and the high-precision integrated nuclear Venturi tube is more reliable and stable to use.
Description
Technical field
The present invention relates to fluid measurement field, particularly a kind of high-precision integrative core level Venturi tube.
Background technology
Venturi tube is a kind of pipeline flow instrument of measuring, and plays the effect of measuring fluid flow.
Third generation advanced Nuclear Power technology main feed system is more and more higher with measuring accuracy, security performance, the requirement in serviceable life of Venturi tube to flow measurement, the heavy caliber venturi apparatus of overall length more than ten rice, uncertainty of measurement require be parity with or superiority over ± 0.25%, higher than 6 times of standard-required ± 1.5% precision, safe operating life requires to arrive 60 years.The nineties, China GNPS is from the main feed system pipeline flow measurement Venturi tube of French import, because of its project organization and reasons, coming into operation after a period of time, occur the phenomenons such as concussion, throat's serious wear, measurement result depart from, its safe service life and nuclear power station visual plant require to differ greatly the tenure of use of 40 to 60 years.Therefore, manufacture and design a set of power station technical requirement of third generation nucleus and safety requirements of meeting, the Venturi tube that can reach specifying measurement precision and serviceable life is the task of top priority of China's nuclear power industry.
Described main feed system is used for controlling Turbine Safety operation, is characterized in heavy caliber, high temperature, high pressure, high flow rate, free of discontinuities operation, and long-term safety performance, stability in use, the measuring accuracy of the Venturi tube that this system is used have very high requirement.Thereby to its manufacturing accuracy, comprise that physical dimension error, right alignment, inside surface roughness, wear-resistant degree etc. have all proposed very high requirement.Therefore, main feedwater Venturi tube high precision like this, large scale, the requirement of long life, designing requirement is very harsh, and difficulty of processing is very large, perplexs for a long time state's inner venturi tube manufacturing always.
Traditional Venturi tube as shown in Figure 1, mainly comprise entrance cylindrical section 1, circular cone contraction section 2, throat 3, circular cone diffuser 4, in the time that Venturi tube nominal diameter is greater than 200mm, conventionally the mode that adopts steel plate to roll welding between each section connects, described circular cone contraction section 2 and circular cone diffuser 4 are formed by roll of steel plate weldering, offer cylindrical section pressure port 1.1 at entrance cylindrical section 1, offer throat's pressure port 3.1 in throat 3, for pressure.This structure may exist that welding deformation, welding dislocation, Welding Safety hidden danger, postwelding are not processed, each section of disalignment, dimensional discrepancy greatly, the defect such as measuring accuracy is not high, safe reliability is poor, be generally used for that pressure is low, normal temperature and the less demanding fluid measurement of measuring accuracy, equal 1.5% as standard GB/T2624 requires this structure Venturi measuring uncertainty.
Its structure of Venturi tube that existing nuclear power plant is used is with reference to external design substantially, as shown in Figure 2, mainly comprise outer tube 5, Venturi tube main body 6, described Venturi tube main body 6 is mainly by inner tube circular cone contraction section 6.1, inner tube throat 6.2, the pressure port 6.2.1 of inner tube throat, inner tube circular cone diffuser 6.3 forms, on outer tube 5, offer upstream extremity pressure port 5.1, offer the pressure port 6.2.1 of inner tube throat in inner tube throat 6.2, by upstream grading ring 7, throat's grading ring 8, upstream impulse ozzle 9, throat's stainless steel impulse flexible pipe 10 and throat's impulse ozzle 11 impulses.This structure is because inner tube circular cone contraction section 6.1, inner tube circular cone diffuser 6.3 adopt steel plate to roll and weld, inside surface is not processed, also can exist because welding causes distortion, not process and cause scale error larger because of inside surface, and easily produce interior leakage because pressure adopts flexible pipe.The defects such as inner tube throat 6.2 and inner tube circular cone contraction section 6.1 junctions are subject to long-term impact of fluid and cause wearing and tearing simultaneously, thereby exist measuring accuracy not high, and serviceable life is not long, and safe reliability is poor.In sum, Venturi tube traditional and prior art all adopts steel plate to roll rear segmentation welding due to each section, and position easy to wear do not take corresponding measure, because meeting harsh designing requirement like this.
Summary of the invention
In order to solve the problem of prior art, the embodiment of the present invention provides a kind of high-precision integrative core level Venturi tube.Bulk strength is high, and each section of right alignment is high, and machining precision is high, and measuring accuracy is high, wear-resistant, long service life, and security performance is good.Described technical scheme is as follows:
A kind of high-precision integrative core level Venturi tube, at least comprises: upstream straight length, Venturi tube body, downstream straight length, grading ring, ozzle, each section of integrated forging of described Venturi tube body, being integrally formed Venturi tube body thus.
Particularly, described integrated Venturi tube body upstream extremity and the second location W.N flange welding, downstream end and the welding of described downstream straight length; Straight length one end, described upstream and the first location W.N flange welding.
Particularly, the opposite face of described the first location W.N flange and described the second location W.N flange is provided with convex-concave locating surface, between two flanges, is provided with gasket seal, by securing member, described the first location W.N flange is connected with described the second location W.N flange.
Particularly, described integrated Venturi tube body at least comprises: entrance cylindrical section, circular cone contraction section, Venturi tube throat, circular cone diffuser, described circular cone contraction section and the excessively interior built-up welding hard wear-resistant material of groove at place of described Venturi tube throat.
Particularly, described integrated Venturi tube body exterior is provided with Venturi tube grading ring, on described Venturi tube grading ring, is provided with ozzle.
Particularly, described Venturi tube grading ring at least comprises: cylindrical section grading ring, throat's grading ring; Described ozzle at least comprises: cylindrical section exhaust nozzle, cylindrical section blowdown ozzle, cylindrical section impulse ozzle, throat's exhaust nozzle, throat's blowdown ozzle, throat's impulse ozzle.
Further, the upper position of described cylindrical section grading ring is provided with described cylindrical section exhaust nozzle, and lower orientation is provided with described cylindrical section blowdown ozzle and described cylindrical section impulse ozzle.
Further, the upper position of described throat grading ring is provided with described throat exhaust nozzle, and lower orientation is provided with described throat blowdown ozzle and described throat impulse ozzle.
Further, on the entrance cylindrical section tube wall of described integrated Venturi tube body, be at least provided with four through holes, communicate with described cylindrical section grading ring, and communicate with the ozzle on described cylindrical section grading ring.
Further, on the Venturi tube throat tube wall of described integrated Venturi tube body, be at least provided with four through holes, communicate with described throat grading ring, and communicate with the ozzle on described throat grading ring.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
The embodiment of the present invention has been optimized prior art Venturi tube general structure, by the entrance cylindrical section of Venturi tube, circular cone contraction section, throat, circular cone diffuser are adopted to integrated forging process, having cancelled Venturi tube steel plate rolls and welding sequence, cancel impulse flexible pipe, and position easy to wear is that circular cone contraction section and throat junction process groove built-up welding hard wear-resistant material, overcome that welding deformation, welding dislocation, welding leakage point, postwelding that each section of prior art Venturi tube adopts segmentation welding to exist are not processed and the defect such as each section of disalignment; Improve venturi tube structure intensity, each section of right alignment and security performance, the reliability and the stability that use, each section of right alignment of Venturi tube of overall length more than ten rice reached or be better than 500 μ m, Venturi tube section surface machine work roughness reaches or is better than Ra1.6, improved greatly the measuring accuracy of Venturi tube, make uncertainty of measurement be better than ± 0.25%.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, to accompanying drawing that describe required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is traditional venturi tube structure schematic diagram;
Fig. 2 is the venturi tube structure schematic diagram that existing nuclear power plant is used;
Fig. 3 is the high-precision integrative core level venturi tube structure schematic diagram that the embodiment of the present invention provides;
Fig. 4 is A-A cut-open view in Fig. 3 of providing of the embodiment of the present invention;
Fig. 5 is B-B cut-open view in Fig. 3 of providing of the embodiment of the present invention;
Fig. 6 is I portion structure enlarged drawing in Fig. 3 of providing of the embodiment of the present invention.
In figure, each symbol represents that implication is as follows:
1 entrance cylindrical section, 1.1 cylindrical section pressure ports;
2 circular cone contraction sections;
3 throats, 3.1 throat's pressure ports;
4 circular cone diffusers;
5 outer tubes, 5.1 upstream extremity pressure ports;
6 Venturi tube main bodys, 6.1 inner tube circular cone contraction sections, 6.2 inner tube throats, 6.2.1 inner tube throat pressure port, 6.3 inner tube circular cone diffusers;
7 upstream grading rings;
8 throat's grading rings;
9 upstream impulse ozzles;
10 throat's stainless steel impulse flexible pipes;
11 throat's impulse ozzles;
12 upstream straight lengths;
13 first location W.N flanges;
14 second location W.N flanges;
15 Venturi tube bodies,
15.1 entrance cylindrical sections, 15.1.1 through hole;
15.2 circular cone contraction sections, 15.2.1 hard wear-resistant material;
15.3 Venturi tube throats, 15.3.1 through hole;
15.4 circular cone diffuser;
16 downstream straight lengths;
17 gasket seals;
18 securing members;
19 Venturi tube grading rings, 19a cylindrical section grading ring, 19b throat grading ring;
20 ozzles, 20a cylindrical section exhaust nozzle, 20b cylindrical section blowdown ozzle, 20c cylindrical section impulse ozzle, 20d throat exhaust nozzle, 20e throat blowdown ozzle, 20f throat impulse ozzle.
In figure, the direction of arrow is media flow direction.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Shown in Figure 3, the embodiment of the present invention provides a kind of high-precision integrative core level Venturi tube, particularly, as preferably, at least comprise: the parts such as upstream straight length 12, the first location W.N flange 13, the second location W.N flange 14, Venturi tube body 15, downstream straight length 16, gasket seal 17, securing member 18, Venturi tube grading ring 19, ozzle 20; Described Venturi tube body 15 upstream extremities and the second location W.N flange 14 weld, and downstream end and downstream straight length 16 weld; Straight length 12 one end, described upstream and the first location W.N flange 13 weld; The opposite face of described the first location W.N flange 13 and the second location W.N flange 14 is provided with convex-concave locating surface, for accurately locating, between two flanges, be provided with gasket seal 17, by securing member 18, the first location W.N flange 13 be connected with the second location W.N flange 14; Described Venturi tube body 15 outer setting have on Venturi tube grading ring 19, Venturi tube grading ring 19 and are provided with ozzle 20.
Simultaneously referring to shown in Fig. 4, Fig. 5, Fig. 6, particularly, as preferably, described Venturi tube body 15 at least comprises: entrance cylindrical section 15.1, circular cone contraction section 15.2, Venturi tube throat 15.3, circular cone diffuser 15.4, each section adopts integrated forging process to form, being integrally formed Venturi tube body 15 thus; Described circular cone contraction section 15.2 and Venturi tube throat 15.3 excessively place's inside surface process groove, and in groove built-up welding hard wear-resistant material 15.2.1.
Particularly, described Venturi tube grading ring 19 at least comprises: cylindrical section grading ring 19a, the grading ring 19b of throat; Described pressure pipe mouth 20 at least comprises: cylindrical section exhaust nozzle 20a, cylindrical section blowdown ozzle 20b, cylindrical section impulse ozzle 20c, the exhaust nozzle 20d of throat, the blowdown ozzle 20e of throat, the impulse ozzle 20f of throat.
Further, the upper position of described cylindrical section grading ring 19a is provided with cylindrical section exhaust nozzle 20a, and lower orientation is provided with cylindrical section blowdown ozzle 20b and at least two cylindrical section impulse ozzle 20c.
Further, the upper position of the described grading ring 19b of throat is provided with the exhaust nozzle 20d of throat, and lower orientation is provided with the blowdown ozzle 20e of throat and Liang Ge throat impulse ozzle 20f at least.
Particularly, on entrance cylindrical section 15.1 tube walls of described integrated Venturi tube body 15, be at least provided with four through hole 15.1.1, top through hole is for exhaust, lower through-hole is for blowdown, and with the cylindrical section blowdown ozzle 20b in the cylindrical section exhaust nozzle 20a of cylindrical section grading ring 19a upper position, lower orientation and the impulse ozzle 20c that is 30-60 degree with surface level angle of inclination communicate.
Particularly, on Venturi tube throat 15.3 tube walls of described integrated Venturi tube body 15, be at least provided with four through hole 15.3.1, top through hole is for exhaust, lower through-hole is for blowdown, and with the blowdown ozzle 20e of throat in the exhaust nozzle 20d of throat of the grading ring 19b of throat upper position, lower orientation and the impulse ozzle 20f that is 30-60 degree with surface level angle of inclination communicate.
The embodiment of the present invention method for making:
1) upstream straight length 12 and the first location W.N flange 13 weld rear finishing inside surface, reach dimensional accuracy, circularity and the surfaceness of engine request;
2) the first roughing inside surface of integrated Venturi tube body 15, excessively process groove in place at circular cone contraction section 15.2 with Venturi tube throat 15.3, and in groove built-up welding hard wear-resistant material 15.2.1, then weld with the second location W.N flange 14, overall finishing inside surface after completing, reaches dimensional accuracy, circularity, surfaceness and the each section of right alignment of engine request;
3) end face of the first location W.N flange 13, the second location W.N flange 14 processes respectively concave surface and convex surface, and by tolerance on fit classification size, reaches the object of accurate cooperation;
4) whether downstream straight length 16 is determined length and wears according to requirement of engineering, and at postwelding finishing inside surface.
Above job operation can guarantee dimensional accuracy, surfaceness, the each section of right alignment of each section, has guaranteed the measuring accuracy of Venturi tube, makes the uncertainty of measurement of Venturi tube arrive or be better than 0.25%, far above standard-required.Because each section of integrated Venturi tube body 15 adopts overall forging and circular cone contraction section 15.2 and the excessively built-up welding processing of place's employing hard wear-resistant material of Venturi tube throat 15.3, its safe reliability and anti-wear performance are improved greatly, extend serviceable life, guaranteed high precision and the stability measured.
In sum, the embodiment of the present invention is for traditional Venturi tube and the existing welding deformation existing by nuclear power plant's Venturi tube, manufacturing dimension error is larger, in pressure flexible pipe, leak, measuring accuracy is not high, the not high defect of security performance, for many years, inventor sets about having carried out deep investigation around nuclear power station main feed system pipeline flow measurement Venturi tube, analyze, research, strict dimensioned precision and the tolerance on fit of controlling Venturi tube body and upstream and downstream straight length, each section of right alignment, optimize Venturi tube general structure, except having aforesaid beneficial effect, also tool has the following advantages:
1. upstream straight length and integrated Venturi tube body section adopt location W.N flange Special tooling clamp, can guarantee the right alignment of upstream straight length and integrated Venturi tube body, the handling while simultaneously facilitating site technique pipeline section inspection and maintenance.
2. circular cone contraction section and throat excessively locate built-up welding hard wear-resistant material, circular cone contraction section and throat excessively locate to be subject to the most serious position of fluid scouring for Venturi tube body, prior art is not done special processing herein, after work a period of time, all there will be wearing and tearing in various degree, affect measuring accuracy, even cause potential safety hazard; After built-up welding hard wear-resistant material, improve the hardness of material, increase rub proofness, improve Measurement sensibility, extend serviceable life.
3. cancel stainless steel flexible hose pressure, adopt directly boring and grading ring pressure, avoided interior leakage hidden danger, improved pressure taking structure.
4. wear upstream straight length and downstream straight length through processing, more meet the requirement of standard to upstream and downstream straight length.
5. overall inside surface has carried out finishing, the particularly inside surface finishing of the circular cone contraction section to integrated Venturi tube body, circular cone diffuser, thereby improve geometric accuracy, right alignment, conicity and the inside surface roughness of integrated Venturi tube body, thereby improved measuring accuracy.
6. easy for installation, leakage point is few, is applicable to be arranged on nuclear power station main feed system, is used for measuring channel inner fluid flow.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a high-precision integrative core level Venturi tube, at least comprise: upstream straight length (12), Venturi tube body (15), downstream straight length (16), grading ring (19), ozzle (20), it is characterized in that, each section of integrated forging of described Venturi tube body (15), being thus integrally formed Venturi tube body (15).
2. high-precision integrative core level Venturi tube according to claim 1, it is characterized in that, described integrated Venturi tube body (15) upstream extremity and the second location W.N flange (14) welding, downstream end and described downstream straight length (16) welding; Straight length (12) one end, described upstream and the first location W.N flange (13) welding.
3. high-precision integrative core level Venturi tube according to claim 2, it is characterized in that, described the first location W.N flange (13) is provided with convex-concave locating surface with the opposite face of described the second location W.N flange (14), between two flanges, be provided with gasket seal (17), by securing member (18), described the first location W.N flange (13) be connected with described the second location W.N flange (14).
4. high-precision integrative core level Venturi tube according to claim 1, it is characterized in that, described integrated Venturi tube body (15) at least comprises: entrance cylindrical section (15.1), circular cone contraction section (15.2), Venturi tube throat (15.3), circular cone diffuser (15.4), each section adopts integrated forging also to carry out finishing, and described circular cone contraction section (15.2) excessively locates with described Venturi tube throat (15.3) that inside surface processes groove and built-up welding hard wear-resistant material (15.2.1) in groove.
5. high-precision integrative core level Venturi tube according to claim 1, it is characterized in that, described integrated Venturi tube body (15) outer setting has Venturi tube grading ring (19), is provided with ozzle (20) on described Venturi tube grading ring (19).
6. high-precision integrative core level Venturi tube according to claim 5, is characterized in that, described Venturi tube grading ring (19) at least comprises: cylindrical section grading ring (19a), throat's grading ring (19b); Described ozzle (20) at least comprises: cylindrical section exhaust nozzle (20a), cylindrical section blowdown ozzle (20b), cylindrical section impulse ozzle (20c), throat's exhaust nozzle (20d), throat's blowdown ozzle (20e), throat's impulse ozzle (20f).
7. high-precision integrative core level Venturi tube according to claim 6, it is characterized in that, the upper position of described cylindrical section grading ring (19a) is provided with described cylindrical section exhaust nozzle (20a), and lower orientation is provided with described cylindrical section blowdown ozzle (20b) and described cylindrical section impulse ozzle (20c).
8. high-precision integrative core level Venturi tube according to claim 6, it is characterized in that, the upper position of described throat grading ring (19b) is provided with described throat exhaust nozzle (20d), and lower orientation is provided with described throat's blowdown ozzle (20e) and described throat's impulse ozzle (20f).
9. according to the high-precision integrative core level Venturi tube described in claim 4 or 6, it is characterized in that, on entrance cylindrical section (15.1) tube wall of described integrated Venturi tube body (15), be at least provided with four through holes (15.1.1), and communicate with the ozzle (20) on described cylindrical section grading ring (19a).
10. according to the high-precision integrative core level Venturi tube described in claim 4 or 6, it is characterized in that, on Venturi tube throat (15.3) tube wall of described integrated Venturi tube body (15), be at least provided with four through holes (15.3.1), and communicate with the ozzle (20) on described throat grading ring (19b).
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| CN201310205081.4A CN103791953B (en) | 2013-05-28 | 2013-05-28 | High-precision integrative core level Venturi tube |
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| CN201310205081.4A CN103791953B (en) | 2013-05-28 | 2013-05-28 | High-precision integrative core level Venturi tube |
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| CN103791953B CN103791953B (en) | 2017-06-09 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043466A (en) * | 2015-08-12 | 2015-11-11 | 银川融神威自动化仪表厂(有限公司) | High-online diffusing pipe double rectangular flowmeter |
| CN106643924A (en) * | 2016-12-28 | 2017-05-10 | 中国科学院上海应用物理研究所 | High-temperature conducting liquid flow quantity measurement device and method based on Venturi tube |
| CN109141548A (en) * | 2018-09-14 | 2019-01-04 | 杭州成套节流装置有限公司 | A kind of Venturi nozzle and processing technology |
| CN111750938A (en) * | 2020-06-17 | 2020-10-09 | 江阴市节流装置厂有限公司 | Large-scale high accuracy owner feedwater venturi subassembly |
| CN111982214A (en) * | 2020-08-28 | 2020-11-24 | 中国人民解放军63919部队 | Micro-differential pressure ventilation flow sensor venturi tube |
| CN114005556A (en) * | 2021-10-25 | 2022-02-01 | 山东核电设备制造有限公司 | Combined type current-limiting Venturi tube suitable for CVS and machining method thereof |
| CN117444551A (en) * | 2023-12-25 | 2024-01-26 | 常州可威尔仪表制造有限公司 | Manufacturing process and measuring method of high-precision venturi flowmeter |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108593020B (en) * | 2018-04-08 | 2021-01-26 | 江阴市节流装置厂有限公司 | Venturi tube flow measuring device and mounting method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4651572A (en) * | 1985-02-20 | 1987-03-24 | Krupp-Koppers Gmbh | Venturi tube |
| CN201173794Y (en) * | 2008-03-11 | 2008-12-31 | 杭州华达诺自动化设备有限公司 | Integral concealed Venturi |
| CN201795816U (en) * | 2010-08-25 | 2011-04-13 | 中冶东方工程技术有限公司 | Hot-dirty generator gas flow detection device |
| CN102359800A (en) * | 2011-10-10 | 2012-02-22 | 苍南自动化仪表厂 | Locally-integrated butt-welding venturi tube |
| CN202869562U (en) * | 2012-10-27 | 2013-04-10 | 江阴市神州测控设备有限公司 | Machining-type Venturi tube |
-
2013
- 2013-05-28 CN CN201310205081.4A patent/CN103791953B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4651572A (en) * | 1985-02-20 | 1987-03-24 | Krupp-Koppers Gmbh | Venturi tube |
| CN201173794Y (en) * | 2008-03-11 | 2008-12-31 | 杭州华达诺自动化设备有限公司 | Integral concealed Venturi |
| CN201795816U (en) * | 2010-08-25 | 2011-04-13 | 中冶东方工程技术有限公司 | Hot-dirty generator gas flow detection device |
| CN102359800A (en) * | 2011-10-10 | 2012-02-22 | 苍南自动化仪表厂 | Locally-integrated butt-welding venturi tube |
| CN202869562U (en) * | 2012-10-27 | 2013-04-10 | 江阴市神州测控设备有限公司 | Machining-type Venturi tube |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043466A (en) * | 2015-08-12 | 2015-11-11 | 银川融神威自动化仪表厂(有限公司) | High-online diffusing pipe double rectangular flowmeter |
| CN106643924A (en) * | 2016-12-28 | 2017-05-10 | 中国科学院上海应用物理研究所 | High-temperature conducting liquid flow quantity measurement device and method based on Venturi tube |
| CN109141548A (en) * | 2018-09-14 | 2019-01-04 | 杭州成套节流装置有限公司 | A kind of Venturi nozzle and processing technology |
| CN111750938A (en) * | 2020-06-17 | 2020-10-09 | 江阴市节流装置厂有限公司 | Large-scale high accuracy owner feedwater venturi subassembly |
| CN111750938B (en) * | 2020-06-17 | 2022-03-18 | 江阴市节流装置厂有限公司 | Large-scale high accuracy owner feedwater venturi subassembly |
| CN111982214A (en) * | 2020-08-28 | 2020-11-24 | 中国人民解放军63919部队 | Micro-differential pressure ventilation flow sensor venturi tube |
| CN114005556A (en) * | 2021-10-25 | 2022-02-01 | 山东核电设备制造有限公司 | Combined type current-limiting Venturi tube suitable for CVS and machining method thereof |
| CN117444551A (en) * | 2023-12-25 | 2024-01-26 | 常州可威尔仪表制造有限公司 | Manufacturing process and measuring method of high-precision venturi flowmeter |
| CN117444551B (en) * | 2023-12-25 | 2024-03-12 | 常州可威尔仪表制造有限公司 | Manufacturing process and measuring method of high-precision venturi flowmeter |
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|---|---|
| CN103791953B (en) | 2017-06-09 |
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