CN202748108U - Liquid reversing device of flow measurement standard system - Google Patents
Liquid reversing device of flow measurement standard system Download PDFInfo
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- CN202748108U CN202748108U CN 201220455254 CN201220455254U CN202748108U CN 202748108 U CN202748108 U CN 202748108U CN 201220455254 CN201220455254 CN 201220455254 CN 201220455254 U CN201220455254 U CN 201220455254U CN 202748108 U CN202748108 U CN 202748108U
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Abstract
The utility model provides a liquid reversing device of a flow measurement standard system. The liquid reversing device consists of a circular-barrel-shaped water distribution barrel, a reversing overflow body and a reversing overflow body drive mechanism, wherein the reversing overflow body is rotatably arranged above the water distribution barrel, a liquid inlet core pipe is arranged at the center of the water distribution barrel, and a liquid inlet pipe port at the center of the reversing overflow body is communicated with an upper-end pipe port of the liquid inlet core pipe in a sealed manner; and a plurality of first water distribution channels, which extend axially and are in uniform radial distribution, taking an axis as a center, in the radial direction, are arranged in the water distribution barrel, second water distribution channels are arranged in the space, outside the first water distribution channels, of the water distribution barrel, the lower parts of the first and the second water distribution channels are respectively communicated with respective liquid outlet pipelines, and overflow spray nozzles, which correspond to the first water distribution channels in position and transverse section and are communicated with the liquid inlet pipe port, are arranged on the reversing overflow body. The liquid reversing device of the flow measurement standard system has the advantages of stable flow field, small swap-in/out time difference, and symmetry, so that the comprehensive uncertainty of the liquid flow measurement standard system is greatly reduced.
Description
Technical field
The utility model relates to the liquid reversing arrangement in the liquid flow mearuement modular system.
Background technology
The liquid reversing arrangement is the commutation switching device in the liquid flow mearuement modular system, be used for finishing the conversion that liquid flows into standard metering system or blow-down pipe, it is in the flow direction handoff procedure that its technical design requires, the flow field relative stability should be guaranteed as far as possible and the symmetry of process that changes to, swaps out, otherwise the uncertainty of fluid flow modular system calibrating index can be increased.Domestic common liquid reversing arrangement mainly contains following several: translation commutation bucket formula, a swing commutation bucket formula, oscillating nozzle formula and piston commutation type etc., front two kinds is the nozzle fixture construction.
Translation commutation bucket reversing arrangement is moved by topworks's promotion commutation bucket linear reciprocation and realizes the liquid commutation, liquid from top to bottom is injected in the commutation bucket passage with the flow velocity close with testing conduit, though it has the little characteristics of flow field disturbance, but flow rate of liquid is higher, the commutation moment splash phenomena, can increase flow verification error and stochastic error, in addition, the bucket quality is relatively large because commutating, the commutation resistance is large, cause commutating period long, cause changing to, the time that swaps out is asymmetric, so this type of reversing arrangement in fact more is applied to the little and little calibrating occasion of flow of test pipe bore.
Swing in the commutation bucket formula reversing arrangement and have reciprocally swinging commutation bucket, liquid is by in the top-down commutation bucket passage that is ejected into swing of top fixed nozzle, its movement travel is short, commutating speed is fast, but same is liquid from top to bottom, flow velocity is high, kinetic energy impacts and produces splash phenomena, produce larger flow verification error and stochastic error, in addition, swing reversing mode, the jet expansion liquid at high speed is impacted the wallboard of wallowing motion in the commutation bucket, has affected the stability in flow field, and commutation bucket reciprocally swinging mode unbalance stress, commutating period is poor also larger.
Oscillating nozzle formula reversing arrangement is opposite with above-mentioned swing commutation bucket formula formation, fixing, the nozzle reciprocally swinging of its commutation bucket, liquid still from top to bottom is ejected into the commutation bucket passage with reciprocal pitch angle from nozzle at a high speed, though liquid decreases to commutation bucket shock effect, but still exist, still existence is splashed and is changed to, swaps out asymmetric technological deficiency.
Piston commutation type reversing arrangement is to switch being communicated with of both sides path and intermediate noxzzle by the to-and-fro movement of piston.This commutating structure is compact, the saving space, and medium does not contact the application scenario of suitable inflammable, volatile, easy heat exchange fluid body medium with the external world.But the disturbance of piston commutation operation stream field is larger, and unbalanced to liquid force in the piston conversion under the high flow velocities effect, the time that causes changing to, swaps out is unsuitable symmetrical.
In sum, existing liquid reversing arrangement ubiquity nozzle flow velocity is higher, topworks comes and goes stressed inconsistent or the stream field disturbance is large, the technological deficiency of the Time Inconsistency that changes to, swaps out, and especially under larger flow, cause and the increase of gauging error and stochastic error affect the flow metering verification result.
Summary of the invention
Goal of the invention of the present utility model is to provide that the disturbance of a kind of flow field is minimum, the journey time symmetry that changes to and swap out, have the liquid reversing arrangement of the flow metering modular system of high calibration accuracy.The liquid reversing arrangement technical scheme of the flow metering modular system that the utility model provides, its main technical content is: a kind of liquid reversing arrangement of flow metering modular system, this device divides bucket, commutation overflow body and commutation overflow body driving mechanism to form by drum-shaped, commutation overflow body rotates and is arranged on a minute bucket top, feed liquor core pipe is arranged on minute bucket central authorities, and the feed liquor mouth of pipe of commutation overflow body central authorities is communicated with feed liquor core pipe upper end ferrule; Divide and be provided with some first minute aquaporins that homogeneous radiation distributes that extend axially, radially centered by axis, are in the bucket, minute bucket space outside first minute aquaporin then is second minute aquaporin, fluid pipeline is separately led to respectively in two passage bottoms, be provided with on the commutation overflow body corresponding with first minute aquaporin position, lateral cross section is corresponding and the flood nozzle that communicates with the feed liquor mouth of pipe.
The liquid reversing arrangement technical scheme of the disclosed flow metering modular system of the utility model, by the feed liquor core pipe in minute bucket make liquid from bottom to top enter commutation overflow body, flow into minute aquaporin of below through the overflow mode, realization is to the technical purpose of the deceleration energy dissipating of flow velocity, and the weir groove type flood nozzle structure of commutation overflow body arranges, can be along with the change of flow, the overflow liquid level is adjusted up and down thereupon, both guaranteed the continuity in flow field, aquaporin was processed by thin plate in first minute, in commutation process, greatly weakened the disturbance to the system flow field, make the liquid flow mearuement modular system in commutation process, the flow field is more steady, stable, therefore, in the deceleration energy dissipating, the stability of its flow field and flow velocity is much better than prior art.In the commutation overflow body commutation process, liquid outflow direction is consistent all the time with minute aquaporin direction of minute bucket, eliminate the commutation of commutation overflow body and rotated the tangential reacting force of midplane, make commutation overflow body stressed even in commutation process, unanimously, greatly dwindled the mistiming of commutation process, the overflow body that commutates simultaneously horizontally rotates the commutation that very little central angle can be realized flood nozzle, and the angular displacement meeting is shortened greatly with the increase of first minute aquaporin layout quantity, it is short to have stroke, the technical characterstic that commutating speed is fast changes to dwindling, mistiming that swaps out has been made strong contribution.The technical program greatly reduces commutation work to the error effect that the flow metering result brings, and has reduced the comprehensive uncertainty of liquid flow mearuement modular system.
Description of drawings
Fig. 1 is the general assembly principle assumption diagram of the liquid reversing arrangement of this flow metering modular system.
Fig. 2 is a minute bucket plan structure figure.
Fig. 3 and Fig. 5 are respectively that two of commutation overflow body is implemented the structure cut-open view.
Fig. 4 and Fig. 6 are respectively the face upwarding assumption diagrams of Fig. 3 and Fig. 5.
Embodiment
The liquid reversing arrangement of the disclosed flow metering modular system of the utility model, divide bucket 4, commutation overflow body 2 and commutation overflow body driving mechanism 1 to form by drum-shaped, commutation overflow body 2 rotates and is arranged on minute bucket 4 tops, feed liquor core pipe 5 is arranged on minute bucket 4 central authorities, the feed liquor mouth of pipe 8 of commutation overflow body 2 central authorities is connected with the feed liquor core pipe 5 upper end mouths of pipe, both connecting portion sealings.At present embodiment, the feed liquor mouth of pipe 8 of commutation overflow body 2 rotates to be communicated with through bearing 3 and is installed in the feed liquor core pipe 5 upper end mouths of pipe, by driving mechanism 1 rotating drive.Divide and be provided with some first minute aquaporin A that homogeneous radiation distributes that extend axially, radially centered by axis, are in the bucket 4, minute bucket space outside first minute aquaporin A is second minute aquaporin B, lead to first minute aquaporin A bottom fluid pipeline 6, aquaporin B bottom was communicated with fluid pipeline 7 in second minute, scene 2 liquid pipeline 6,7 isolated.One specific implementation structure of described commutation overflow body 2 as shown in Figure 3, be take the rounding conical surface body of the feed liquor mouth of pipe 8 as the top, be provided with corresponding with first minute aquaporin A position, below on the circular conical surface and the overflow vent that the plane of structure shape is corresponding and the vertical-overflow nozzle 9 that is connected with overflow vent.For different overflow a fluid streams are implemented guiding, when especially avoiding the rill bundle, near object to the suction-operated of a fluid stream and excessive, also outwards be provided with the uniform some weir flow grooves 10 of width by the nearly center of circle in the flood nozzle 9 by the overflow liquid level in order effectively to determine simultaneously, liquid enters commutation overflow body 2 from the bottom to top, can be along with the increase of system flow rate, the overflow liquid level increases, and liquid is by the gradually laterally weir flow groove extension of inboard weir flow groove 10, to underflow stream; Another specific implementation structure of commutation overflow body 2 is structure shown in Figure 5, the feed liquor mouth of pipe 8 that centers on the center is provided with some concentric ladders and goes on foot the weir flow annular groove 11 that increases, first minute aquaporin direction of each flood nozzle 9 and below is consistent, and each the road weir flow groove 10 in the flood nozzle 9 and each road weir flow annular groove 11 radially successively linking communicate.Driving mechanism 1 drives 2 commutations of commutation overflow body and rotates, it drives rotating manner and can rotate for reciprocating reversing, can also be that unidirectional stepping commutation is rotated, reciprocating reversing rotates, and to be driving mechanism 1 control commutation overflow body 2 reciprocal corners by 1/2 of two adjacent first minute aquaporin A central angle, unidirectional stepping commutation is rotated, and to be driving mechanism 1 control the stepping corner of commutation overflow body 2 by 1/2 of the central angle of two adjacent first minute aquaporin A, certainly also can according to the reality requirement that specifically commutates, take different commutation overflow bodies 2 commutation control modes.
Claims (7)
1. the liquid reversing arrangement of a flow metering modular system, it is characterized in that this device divides bucket (4), commutation overflow body (2) and commutation overflow body driving mechanism (1) to form by drum-shaped, commutation overflow body (2) rotates and is arranged on a minute bucket (4) top, feed liquor core pipe (5) is arranged on a minute bucket (4) central authorities, and the feed liquor mouth of pipe (8) of commutation overflow body (2) central authorities is communicated with feed liquor core pipe (5) upper end ferrule; Divide and be provided with some first minute aquaporins (A) that homogeneous radiation distributes that extend axially, radially centered by axis, are in the bucket, minute bucket space outside first minute aquaporin (A) then is second minute logical (B) road of water, fluid pipeline is separately led to respectively in two passage bottoms, be provided with in commutation overflow body (2) corresponding with first minute aquaporin (A) position, the athwartship plane shape is corresponding and the flood nozzle (9) that communicates with the feed liquor mouth of pipe.
2. the liquid reversing arrangement of flow metering modular system according to claim 1, the overflow body (2) that it is characterized in that commutating is take the rounding conical surface body of the feed liquor mouth of pipe (8) as the top, is provided with corresponding with first minute aquaporin (A) position, below on the circular conical surface and the overflow vent that the athwartship plane shape is corresponding and the vertical-overflow nozzle (9) that is connected with overflow vent.
3. the liquid reversing arrangement of flow metering modular system according to claim 1, the upper feed liquor mouth of pipe (8) around the center of overflow body (2) that it is characterized in that commutating is provided with some concentric ladders and goes on foot the weir flow annular groove (11) that increases, and each flood nozzle (9) radially communicates with each road weir flow annular groove (11) linking.
4. the liquid reversing arrangement of flow metering modular system according to claim 1 and 2 is characterized in that outwards being provided with the uniform some weir flow grooves of width (10) by the nearly center of circle in the flood nozzle (9).
5. the liquid reversing arrangement of flow metering modular system according to claim 3 is characterized in that outwards being provided with the uniform some weir flow grooves of width (10) by the nearly center of circle in the flood nozzle (9).
6. the liquid reversing arrangement of flow metering modular system according to claim 1, the overflow body that it is characterized in that commutating is back and forth controlled the corner that commutates by driving mechanism (1) by 1/2 of two adjacent first minute aquaporin (A) central angle.
7. the liquid reversing arrangement of flow metering modular system according to claim 1, it is characterized in that commutating overflow body (2) by driving mechanism (1) by two adjacent first minute aquaporin (A) central angle 1/2 come control step commutation corner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220455254 CN202748108U (en) | 2012-09-07 | 2012-09-07 | Liquid reversing device of flow measurement standard system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220455254 CN202748108U (en) | 2012-09-07 | 2012-09-07 | Liquid reversing device of flow measurement standard system |
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| CN202748108U true CN202748108U (en) | 2013-02-20 |
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| CN 201220455254 Expired - Fee Related CN202748108U (en) | 2012-09-07 | 2012-09-07 | Liquid reversing device of flow measurement standard system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236684A (en) * | 2014-10-16 | 2014-12-24 | 广州能源检测研究院 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
| CN105371926A (en) * | 2015-10-29 | 2016-03-02 | 武汉浪淘石科技有限公司 | High-speed rotation-type water diversion instrument used for flow measurement |
| CN109374092A (en) * | 2018-12-29 | 2019-02-22 | 新乡航空工业(集团)有限公司 | High-precision air-sweeping type commutation weighing system for meter proof |
-
2012
- 2012-09-07 CN CN 201220455254 patent/CN202748108U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236684A (en) * | 2014-10-16 | 2014-12-24 | 广州能源检测研究院 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
| CN104236684B (en) * | 2014-10-16 | 2017-05-17 | 广州能源检测研究院 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
| CN105371926A (en) * | 2015-10-29 | 2016-03-02 | 武汉浪淘石科技有限公司 | High-speed rotation-type water diversion instrument used for flow measurement |
| CN105371926B (en) * | 2015-10-29 | 2018-08-10 | 武汉浪淘石科技有限公司 | A kind of high-speed rotary for flow measurement divides water instrument |
| CN109374092A (en) * | 2018-12-29 | 2019-02-22 | 新乡航空工业(集团)有限公司 | High-precision air-sweeping type commutation weighing system for meter proof |
| CN109374092B (en) * | 2018-12-29 | 2024-05-31 | 航空工业(新乡)计测科技有限公司 | High-precision air-blowing reversing weighing system for calibrating flowmeter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20190907 |
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| CF01 | Termination of patent right due to non-payment of annual fee |