CN104457863A - Method and wire pipe air speed flow meter for measuring air speeds on wire feeding pipelines - Google Patents
Method and wire pipe air speed flow meter for measuring air speeds on wire feeding pipelines Download PDFInfo
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- CN104457863A CN104457863A CN201410754989.5A CN201410754989A CN104457863A CN 104457863 A CN104457863 A CN 104457863A CN 201410754989 A CN201410754989 A CN 201410754989A CN 104457863 A CN104457863 A CN 104457863A
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Abstract
The invention discloses a method and a wire pipe air speed flow meter for measuring air speeds on wire feeding pipelines. The wire pipe air speed flow meter is mounted on a wire feeding pipe, two ends of the wire pipe air speed flow meter are connected with the wire feeding pipe by Mollin hoops, an air inlet end of the wire pipe air speed flow meter is required to be at least connected with a straight pipe section with the length of 10D, an air outlet of the wire pipe air speed flow meter is required to be at least connected with a straight pipe section with the length of 5D, and the D represents the diameter of the wire feeding pipe. The method for measuring the air speeds includes enabling airflow to flow into the wire pipe air speed flow meter when the air speeds are about to be measured; measuring pressure difference, namely resistance loss, between first pressure difference sampling holes and second pressure different sampling holes in a measuring pipe by the aid of a differential pressure transmitter on the wire pipe air speed flow meter; computing the air speed of the wire feeding pipe according to the pressure difference which is the resistance loss. Two-wire current signals can be generated by the differential pressure transmitter and range from 4mA to 20mA, and the differential pressure transmitter is connected with a control system. A pressure sensing device is used for measuring the internal air pressure of the measuring pipe.
Description
Technical field
The present invention relates to a kind of pipeline flowmeter, be specifically related to a kind of flowmeter for cigarette machine Pneumatic Feeding System wire feed pipeline measuring wind speed.
Background technology
The cigarette machine overwhelming majority of current domestic cigar mill have employed Pneumatic Feeding System, a cigarette machine needs to be equipped with a set of wind power balance equipment (wind-speed adjusting device), and wind power balance equipment generally comprises backwind tube orifice flowmeter, electric control valve, control system and accessory etc.Wind power balance equipment is Pneumatic Feeding System wind power balance, cigarette machine wind speed is stablized and the key equipment controlled, the real control objectives of cigarette machine Pneumatic Feeding System is the wind speed of wire-feeding pipe, owing to having pipe tobacco in wire-feeding pipe, adopt existing airduct orifice flowmeter can not realize measuring wind on wire-feeding pipe.What existing wind power balance equipment adopted is survey wind speed at backwind tube, carrys out controlled wind speed by control system regulating and controlling backwind tube variable valve, realizes the stable of wire-feeding pipe wind speed.But due to two-phase flow and the feature such as tobacco structure is special, adopt backwind tube to survey wind speed and there is following problem: leak out because cigarette machine aspirator bucket turnover panel and connecting end surface (being called for short aspirator bucket) exist, do not cause the air quantity of wire feed pipeline and return air duct within the unit interval not etc., that wind speed backwind tube wind speed being converted into aspirator pipeline should be multiplied by an experience air leakage coefficient under normal circumstances, calculated by sectional area ratio and after air leak rate of air curtain conversion, show the wind speed of wire-feeding pipe.In fact; in process of production; after aspirator bucket often completes an aspirator cycle; the situation of leaking out of aspirator bucket is all different; due to uncertain air leakage coefficient, pipe tobacco conveying real wind speed and state opaque; sometimes the wind speed of backwind tube is normal or very high, but wire-feeding pipe also there will be the phenomenon of wind speed even plug wire on the low side.Therefore, wire-feeding pipe is surveyed wind speed to survey wind speed to the wind speed controlling wire-feeding pipe than on backwind tube and have more practical significance to the wind speed controlling wire-feeding pipe.
Summary of the invention
The object of the invention is to overcome existing cigarette machine Pneumatic Feeding System to adopt at backwind tube survey wind speed participation wind power balance control Problems existing, provide a kind of being arranged on wire-feeding pipe to survey wind speed to control method and the fiber tube wind speed flowmeter of wire-feeding pipe wind speed.
Technical scheme of the present invention is: a kind of method of measuring wind on wire feed pipeline, fiber tube wind speed flowmeter is arranged on wire-feeding pipe, the two ends of fiber tube wind speed flowmeter adopt Mo Linsi clamp connection, fiber tube wind speed flowmeter air intake vent end at least needs to connect the long straight length of 10D, air outlet at least needs to connect the long straight length of 5D, and wherein D is the diameter of wire-feeding pipe.
The method that fiber tube wind speed flowmeter measures wire-feeding pipe air velocity duct is as follows: fiber tube wind speed flowmeter adopts non-standard Venturi meter principle to design, pressure reduction is measured at the two ends of shrinking cone at trunnion, equal the principle of drag losses according to total head difference, utilize the differential manometer of drag losses to calculate wind speed.
During measurement, air-flow enters fiber tube wind speed flowmeter through wire-feeding pipe, by the pressure reduction on the differential pressure transmitter measurement measuring tube on fiber tube wind speed flowmeter between the first pressure reduction thief hole and the second pressure reduction thief hole and drag losses, two-wire system current signal selected by differential pressure transmitter, current signal is 4-20mA, differential pressure transmitter is connected with control system, calculates the wind speed of wire-feeding pipe according to the differential manometer of drag losses.
Its computing formula is: V=K
In formula: V is the wind speed (m/s) in wire-feeding pipe;
DP is the measurement pressure reduction (Pa) of fiber tube flowmeter;
K is the coefficient of shock resistance of fiber tube wind speed flowmeter, is obtained by actual measurement.
Pressure sensor device is used for measuring the blast in measuring tube.
The fiber tube wind speed flowmeter that said method adopts, comprises measuring tube, trunnion, the first pressure reduction sampler, the second pressure reduction sampler, pressure sensor device and differential pressure transmitter.
Described measuring tube is respectively equipped with the first pressure reduction thief hole, the second pressure reduction thief hole and pressure sensing thief hole.
The two ends of described trunnion are respectively equipped with trunnion and shrink cone and trunnion diffusing cone, the cone angle a1 that trunnion shrinks cone is 15 ~ 25 degree, the cone angle a2 of trunnion diffusing cone is 6 ~ 12 degree, shrinks on the tube wall of boring between trunnion diffusing cone be provided with the second pressure reduction thief hole at trunnion.
Trunnion is fixedly mounted in measuring tube, and the outer wall of trunnion and the inwall of measuring tube adopt interference fit, and the second pressure reduction thief hole on trunnion tube wall is corresponding with the second pressure reduction thief hole on measuring tube.
The first described pressure reduction sampler comprises the first pressure reduction sampler, the first gland, the first filter and the first pedestal, first pedestal is welded on the tube wall of measuring tube, and the first pressure reduction thief hole corresponded on measuring tube tube wall, first filter and the first gland are arranged on the first pedestal by screw, and the first pressure reduction sampler is arranged on the first gland.
The second described pressure reduction sampler comprises the second pressure reduction sampler, the second gland, the second filter and the second pedestal, second pedestal is welded on the tube wall of measuring tube, and the second pressure reduction thief hole corresponded on measuring tube tube wall, second filter and the second gland are arranged on the second pedestal by screw, and the second pressure reduction sampler is arranged on the second gland.
Described pressure sensor device comprises pressure transducer, the 3rd gland, the 3rd filter and the 3rd pedestal, 3rd pedestal is welded on the tube wall of measuring tube, and the pressure sensing thief hole corresponded on measuring tube tube wall, 3rd filter and the 3rd gland are arranged on the 3rd pedestal by screw, and pressure transducer is arranged on the 3rd gland.
Described differential pressure transmitter is arranged on the tube wall of measuring tube, and is between the second pressure reduction sampler and pressure sensor device, and differential pressure transmitter is connected with the sample tap of the first pressure reduction sampler and the second pressure reduction sampler respectively by pipeline.
The further technical scheme of the present invention is: described fiber tube flowmeter also comprises the first end plate, the second end plate, lower encioser and upper encloser, the upper end of the first end plate is provided with wire hole, the Lower Half of the first end plate is provided with a plurality of threaded hole, the structure of the second end plate and the structure of the first end plate communicate, first end plate and the second end plate are arranged on the two ends of measuring tube respectively, lower encioser is arranged on the first end plate and the second end plate by screw, upper encloser is buckled on lower encioser by buckling, and is covered by the parts on measuring tube by lower encioser and upper encloser.
The present invention compared with prior art has following features:
1, fiber tube wind speed flowmeter is installed on wire feed pipeline and directly measures wind speed in wire-feeding pipe, directly show wire-feeding pipe wind speed;
2, fiber tube flowmeter is arranged on wire feed pipeline, and space is open, and can meet 5D technical requirement after 10D before fiber tube wind speed flowmeter, measuring accuracy is up to 2%.
The present invention compared with prior art has following features:
Below in conjunction with the drawings and specific embodiments, detailed construction of the present invention is further described.
Accompanying drawing explanation
Accompanying drawing 1 is fiber tube wind speed flowmeter structure schematic diagram provided by the invention;
Accompanying drawing 2 is the A portion enlarged drawing in accompanying drawing 1;
Accompanying drawing 3 is the B portion enlarged drawing in accompanying drawing 1;
Accompanying drawing 4 is the C portion enlarged drawing in accompanying drawing 1;
Accompanying drawing 5 is the structural representation of trunnion;
Accompanying drawing 6 is for being provided with the structural representation of the fiber tube wind speed flowmeter of the first end plate and the second end plate;
Accompanying drawing 7 is the left view in accompanying drawing 6;
Accompanying drawing 8 is for being provided with the structural representation of lower encioser and upper encloser;
Accompanying drawing 9 is the left view in accompanying drawing 8.
Embodiment
A kind of method of measuring wind on wire feed pipeline, fiber tube wind speed flowmeter is arranged on wire-feeding pipe, the two ends of fiber tube wind speed flowmeter adopt Mo Linsi clamp connection, fiber tube wind speed flowmeter air intake vent end at least needs to connect the long straight length of 10D, air outlet at least needs to connect the long straight length of 5D, and wherein D is the diameter of wire-feeding pipe.
The method that fiber tube wind speed flowmeter provided by the invention measures wire-feeding pipe air velocity duct is as follows: fiber tube wind speed flowmeter adopts non-standard Venturi meter principle to design, pressure reduction is measured at the two ends of the contraction cone 2-1 of fiber tube wind speed flowmeter trunnion 2, equal the principle of drag losses according to total head difference, utilize the differential manometer of drag losses to calculate wind speed.
During measurement, air-flow enters fiber tube wind speed flowmeter through wire-feeding pipe, pressure reduction on measuring tube 1 between first pressure reduction thief hole 1-1 and the second pressure reduction thief hole 1-2 and drag losses is measured by the differential pressure transmitter 6 on fiber tube wind speed flowmeter, two-wire system current signal selected by differential pressure transmitter 6, current signal is 4-20mA, differential pressure transmitter 6 is connected with control system, calculates the wind speed of wire-feeding pipe according to the differential manometer of drag losses.
Its computing formula is: V=K
In formula: V is the wind speed (m/s) in wire-feeding pipe;
DP is the measurement pressure reduction (Pa) of fiber tube flowmeter;
K is the coefficient of shock resistance of fiber tube wind speed flowmeter, and obtaining K by actual measurement is 1.88.
Pressure sensor device 5 is used for measuring the blast in measuring tube 1.
The fiber tube wind speed flowmeter that said method adopts comprises measuring tube 1, trunnion 2, first pressure reduction sampler 3, second pressure reduction sampler 4, pressure sensor device 5 and differential pressure transmitter 6.
The internal diameter of described measuring tube 1 is 170mm, measuring tube 1 is respectively equipped with the first pressure reduction thief hole 1-1, the second pressure reduction thief hole 1-2 and pressure sensing thief hole 1-3.
The internal diameter of described trunnion 2 is 170mm, the two ends of trunnion 2 are respectively equipped with trunnion and shrink cone 2-1 and trunnion diffusing cone 2-2, the cone angle a1 that trunnion shrinks cone 2-1 is 21 degree, the cone angle a2 of trunnion diffusing cone 2-2 is 10 degree, shrinks on the tube wall of boring between 2-1 and trunnion diffusing cone 2-2 be provided with the second pressure reduction thief hole 2-3 at trunnion.
Trunnion 2 is fixedly mounted in measuring tube 1, and the outer wall of trunnion 2 and the inwall of measuring tube 1 adopt interference fit, and the second pressure reduction thief hole 2-3 on trunnion 2 tube wall is corresponding with the second pressure reduction thief hole 1-2 on measuring tube 1.
The first described pressure reduction sampler 3 comprises the first pressure reduction sampler 3-1, the first gland 3-2, the first filter 3-3 and the first pedestal 3-4, first pedestal 3-4 is welded on the tube wall of measuring tube 1, and the first pressure reduction thief hole 1-1 corresponded on measuring tube 1 tube wall, first filter 3-3 and the first gland 3-2 is arranged on the first pedestal 3-4 by screw, and the first pressure reduction sampler 3-1 is arranged on the first gland 3-2.
The second described pressure reduction sampler 4 comprises the second pressure reduction sampler 4-1, the second gland 4-2, the second filter 4-3 and the second pedestal 4-4, second pedestal 4-4 is welded on the tube wall of measuring tube 1, and the second pressure reduction thief hole 1-2 corresponded on measuring tube 1 tube wall, second filter 4-3 and the second gland 4-2 is arranged on the second pedestal 4-4 by screw, and the second pressure reduction sampler 4-1 is arranged on the second gland 4-2.
Described pressure sensor device 5 comprises pressure transducer 5-1, the 3rd gland 5-2, the 3rd filter 5-3 and the 3rd pedestal 5-4,3rd pedestal 5-4 is welded on the tube wall of measuring tube 1, and the pressure sensing thief hole 1-3 corresponded on measuring tube 1 tube wall, 3rd filter 5-3 and the 3rd gland 5-2 is arranged on the 3rd pedestal 4-4 by screw, and pressure transducer 5-1 is arranged on the 3rd gland 5-2.
Described differential pressure transmitter 6 is arranged on the tube wall of measuring tube 1, and is between the second pressure reduction sampler 4 and pressure sensor device 5, and differential pressure transmitter 6 is connected with the sample tap of the first pressure reduction sampler 3-1 and the second pressure reduction sampler 4-1 respectively by pipeline.
The further technical scheme of the present embodiment is: described fiber tube flowmeter also comprises the first end plate 7, second end plate 8, lower encioser 9 and upper encloser 10, the upper end of the first end plate 7 is provided with wire hole 7-1, the Lower Half of the first end plate 7 is provided with a plurality of threaded hole 7-2, the structure of the second end plate 8 and the structure of the first end plate 7 communicate, first end plate 7 and the second end plate 8 are arranged on the two ends of measuring tube 1 respectively, lower encioser 9 is arranged on the first end plate 7 and the second end plate 8 by screw, upper encloser 10 is buckled on lower encioser 9 by buckling 11, by lower encioser 9 and upper encloser 10, the parts on measuring tube 1 are covered.
Claims (4)
1. the method for a measuring wind on wire feed pipeline, it is characterized in that: fiber tube wind speed flowmeter is arranged on wire-feeding pipe, the two ends of fiber tube wind speed flowmeter adopt Mo Linsi clamp connection, fiber tube wind speed flowmeter air intake vent end at least needs to connect the long straight length of 10D, air outlet at least needs to connect the long straight length of 5D, and wherein D is the diameter of wire-feeding pipe;
The method that fiber tube wind speed flowmeter measures wire-feeding pipe air velocity duct is as follows: fiber tube wind speed flowmeter adopts non-standard Venturi meter principle to design, pressure reduction is measured at the two ends of shrinking cone at trunnion, equal the principle of drag losses according to total head difference, utilize the differential manometer of drag losses to calculate wind speed;
During measurement, air-flow enters fiber tube wind speed flowmeter through wire-feeding pipe, by the pressure reduction on the differential pressure transmitter measurement measuring tube on fiber tube wind speed flowmeter between the first pressure reduction thief hole and the second pressure reduction thief hole and drag losses, two-wire system current signal selected by differential pressure transmitter, current signal is 4-20mA, differential pressure transmitter is connected with control system, calculates the wind speed of wire-feeding pipe according to the differential manometer of drag losses;
Its computing formula is: V=K
In formula: V is the wind speed (m/s) in wire-feeding pipe;
DP is the measurement pressure reduction (Pa) of fiber tube flowmeter;
K is the coefficient of shock resistance of fiber tube wind speed flowmeter, is obtained by actual measurement;
Pressure sensor device is used for measuring the blast in measuring tube.
2. the method for a kind of measuring wind on wire feed pipeline according to claim 1, is characterized in that: described fiber tube wind speed flowmeter comprises measuring tube, trunnion, the first pressure reduction sampler, the second pressure reduction sampler, pressure sensor device and differential pressure transmitter;
Described measuring tube is respectively equipped with the first pressure reduction thief hole, the second pressure reduction thief hole and pressure sensing thief hole;
The two ends of described trunnion are respectively equipped with trunnion and shrink cone and trunnion diffusing cone, shrink on the tube wall of boring between trunnion diffusing cone be provided with the second pressure reduction thief hole at trunnion;
Trunnion is fixedly mounted in measuring tube, and the outer wall of trunnion and the inwall of measuring tube adopt interference fit, and the second pressure reduction thief hole on trunnion tube wall is corresponding with the second pressure reduction thief hole on measuring tube;
The first described pressure reduction sampler comprises the first pressure reduction sampler, the first gland, the first filter and the first pedestal, first pedestal is welded on the tube wall of measuring tube, and the first pressure reduction thief hole corresponded on measuring tube tube wall, first filter and the first gland are arranged on the first pedestal by screw, and the first pressure reduction sampler is arranged on the first gland;
The second described pressure reduction sampler comprises the second pressure reduction sampler, the second gland, the second filter and the second pedestal, second pedestal is welded on the tube wall of measuring tube, and the second pressure reduction thief hole corresponded on measuring tube tube wall, second filter and the second gland are arranged on the second pedestal by screw, and the second pressure reduction sampler is arranged on the second gland;
Described pressure sensor device comprises pressure transducer, the 3rd gland, the 3rd filter and the 3rd pedestal, 3rd pedestal is welded on the tube wall of measuring tube, and the pressure sensing thief hole corresponded on measuring tube tube wall, 3rd filter and the 3rd gland are arranged on the 3rd pedestal by screw, and pressure transducer is arranged on the 3rd gland;
Described differential pressure transmitter is arranged on the tube wall of measuring tube, and is between the second pressure reduction sampler and pressure sensor device, and differential pressure transmitter is connected with the sample tap of the first pressure reduction sampler and the second pressure reduction sampler respectively by pipeline.
3. the method for a kind of measuring wind on wire feed pipeline according to claim 2, is characterized in that: it is characterized in that: the cone angle a1 that trunnion shrinks cone is 15 ~ 25 degree, and the cone angle a2 of trunnion diffusing cone is 6 ~ 12 degree.
4. the method for a kind of measuring wind on wire feed pipeline according to Claims 2 or 3, it is characterized in that: described fiber tube wind speed flowmeter also comprises the first end plate, second end plate, lower encioser and upper encloser, the upper end of the first end plate is provided with wire hole, the Lower Half of the first end plate is provided with a plurality of threaded hole, the structure of the second end plate and the structure of the first end plate communicate, first end plate and the second end plate are arranged on the two ends of measuring tube respectively, lower encioser is arranged on the first end plate and the second end plate by screw, upper encloser is buckled on lower encioser by buckling, by lower encioser and upper encloser, the parts on measuring tube are covered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410754989.5A CN104457863A (en) | 2014-12-11 | 2014-12-11 | Method and wire pipe air speed flow meter for measuring air speeds on wire feeding pipelines |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410754989.5A CN104457863A (en) | 2014-12-11 | 2014-12-11 | Method and wire pipe air speed flow meter for measuring air speeds on wire feeding pipelines |
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| CN104457863A true CN104457863A (en) | 2015-03-25 |
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| CN201410754989.5A Pending CN104457863A (en) | 2014-12-11 | 2014-12-11 | Method and wire pipe air speed flow meter for measuring air speeds on wire feeding pipelines |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105092101A (en) * | 2015-09-16 | 2015-11-25 | 合肥瑞纳表计有限公司 | Ultrasonic calorimeter |
| CN105372446A (en) * | 2015-12-12 | 2016-03-02 | 中国航空工业集团公司西安飞机设计研究所 | Differential pressure type wind speed measuring sensor and detecting device with same |
| CN107727541A (en) * | 2017-10-31 | 2018-02-23 | 中国石油大学(北京) | Aerosol monitoring device and method and pipe-line system in pipeline |
| CN108115399A (en) * | 2017-12-04 | 2018-06-05 | 北京星航机电装备有限公司 | The special-shaped long welded tube screw switching installation method of cambered surface Mulit-point Connection cover board long and narrow space |
| CN108438911A (en) * | 2018-04-19 | 2018-08-24 | 山西乐普节能科技有限公司 | A kind of benefit wind pressure alters a grade regulating system |
| CN109490573A (en) * | 2018-11-02 | 2019-03-19 | 湖南核三力技术工程有限公司 | The lossless flow-speed measurement method of material and monitoring device based on resistance of pipe system characteristic in pneumatic conveying |
| CN110150731A (en) * | 2019-05-29 | 2019-08-23 | 安徽中烟工业有限责任公司 | A Judgment Method for Air Leakage in Suction Silo of Coiling Machine |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092101A (en) * | 2015-09-16 | 2015-11-25 | 合肥瑞纳表计有限公司 | Ultrasonic calorimeter |
| CN105372446A (en) * | 2015-12-12 | 2016-03-02 | 中国航空工业集团公司西安飞机设计研究所 | Differential pressure type wind speed measuring sensor and detecting device with same |
| CN107727541A (en) * | 2017-10-31 | 2018-02-23 | 中国石油大学(北京) | Aerosol monitoring device and method and pipe-line system in pipeline |
| CN107727541B (en) * | 2017-10-31 | 2023-08-08 | 中国石油大学(北京) | Device and method for monitoring aerosol in pipeline and pipeline system |
| CN108115399A (en) * | 2017-12-04 | 2018-06-05 | 北京星航机电装备有限公司 | The special-shaped long welded tube screw switching installation method of cambered surface Mulit-point Connection cover board long and narrow space |
| CN108115399B (en) * | 2017-12-04 | 2019-08-06 | 北京星航机电装备有限公司 | The special-shaped long welded tube screw switching installation method of cambered surface Mulit-point Connection cover board long and narrow space |
| CN108438911A (en) * | 2018-04-19 | 2018-08-24 | 山西乐普节能科技有限公司 | A kind of benefit wind pressure alters a grade regulating system |
| CN108438911B (en) * | 2018-04-19 | 2023-11-21 | 江苏高创风电设备有限公司 | Air supplementing pressure channeling level adjusting system |
| CN109490573A (en) * | 2018-11-02 | 2019-03-19 | 湖南核三力技术工程有限公司 | The lossless flow-speed measurement method of material and monitoring device based on resistance of pipe system characteristic in pneumatic conveying |
| CN110150731A (en) * | 2019-05-29 | 2019-08-23 | 安徽中烟工业有限责任公司 | A Judgment Method for Air Leakage in Suction Silo of Coiling Machine |
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Owner name: HUNAN HESANLI TECHNLOGY ENGINEERING CO., LTD. Free format text: FORMER OWNER: HENGYANG SUNNY HIGH-TECH RESEARCH + DEVELOPMENT CO., LTD. Effective date: 20150629 |
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Effective date of registration: 20150629 Address after: 421001 No. 160 Jiefang West Road, Hunan, Hengyang Applicant after: HUNAN HESANLI TECHNOLOGY ENGINEERING CO., LTD. Address before: 421001 No. 160 Jiefang West Road, Hunan, Hengyang Applicant before: Hengyang Sunny High-Tech Research & Development Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |