CN102944293B - The passive piston volume tube of raster pattern - Google Patents
The passive piston volume tube of raster pattern Download PDFInfo
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- CN102944293B CN102944293B CN201210505375.4A CN201210505375A CN102944293B CN 102944293 B CN102944293 B CN 102944293B CN 201210505375 A CN201210505375 A CN 201210505375A CN 102944293 B CN102944293 B CN 102944293B
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Abstract
The present invention relates to the passive piston volume tube of raster pattern, belong to field of liquid flow measurement.Comprise cylinder body, built-in spring piston, lift valve, piston rod, return mechanism, line measurement grating scale, detection head, detection head mounting blocks, guide plate, be fixedly connected with block, guide rail slide block, orbit of guide rail, guide rail base; Piston is placed in cylinder interior; Lift valve is fixedly connected with piston rod; Piston rod one end is fixedly connected with guide plate; Guide plate and contiguous block, guide rail slide block are fixedly connected sequentially; Orbit of guide rail, guide rail base are fixedly connected with cylinder body; Guide rail base is parallel with piston rod; Detection head mounting blocks is fixed on the side of contiguous block; Detection head is arranged on detection head mounting blocks; Grating scale is fixed on guide rail base side, and detection head can translation gliding on grating scale.The present invention realizes continuous coverage, effectively shortens the time of single measurement, significantly improves the efficiency of single measurement; Reduce the lower limit of volume pipe flow measurement, the useful range of volume pipe is than expanding further.
Description
Technical field
The present invention relates to a kind of passive piston volume tube, particularly relate to the passive piston volume tube of raster pattern, belong to field of liquid flow measurement.
Background technology
Different according to the measurement Main Regulator of measurement parameter and selection, liquid flow standard device can be divided into volumetric method and mass method, and volumetric method comprises metal tank method, ball volume pipe, passive Piston-type oxygen compressor, active piston volume pipe.Mass method is with the Main Regulator of weighing apparatus as flow measurement.Passive Piston-type oxygen compressor is used for the Main Regulator of volumetric method flow standard device, is mainly used in the metering of the fluid floies such as petroleum products.
The passive piston volume tube that the domestic and international existing technical literature published about passive Piston-type oxygen compressor and product description describe is fixed volume formula, (U.S. patent No. Ser.No.5052211, on October 1st, 1991; U.S. patent No. Ser.No.07/259879, on October 19th, 1988; U.S. patent No. Ser.No.07/408627, on September 18th, 1989).Its principle triggers by piston rod the volume that fixed range that two switches being arranged on volume pipe outside move calculates the liquid that volume pipe is discharged.This Method And Principle is comparatively simple, but there is many deficiencies.Passive piston volume tube all has larger range ratio, is generally greater than 1: 50, and the method that floatless switch measures volume is difficult to the measurement efficiency taking into account bound flow.Usually, in order to ensure the accuracy of time measurement, switch fixed distance needs the Measuring Time guaranteeing upper limit flow can not be too short, is in general not less than for 5 seconds; Because measurement volume is fixing, when limit flow is 1/50 of upper limit flow so instantly, Measuring Time will reach more than 250 seconds, and efficiency reduces rapidly.If flow range ratio increases further, then the longest working time of single measurement process with hour calculating, greatly will have impact on work efficiency.Even if do not considering under the condition measuring efficiency.The time span of single measurement process neither be unconfined, long experimental period is difficult to ensure the isoparametric consistance of drift of temperature in whole process, pressure, instrument itself, measurement result is difficult to obtain reliable conclusion, and this just prevents the expansion of limit flow under passive type piston volume tube.In addition, no matter uninterrupted, each measuring process all must cover the distance of two switch defineds, cannot stop in midway, often does one-shot measurement experiment and all must re-start reset operation; And the average discharge of overall process can only be obtained, instant fluctuations in discharge can not be reacted, lack the ability of dynamic flow measurement.
Summary of the invention
The technical problem to be solved in the present invention realizes passive Piston-type oxygen compressor instantaneous delivery to measure, and improves passive Piston-type oxygen compressor work efficiency, expand the useful range of passive Piston-type oxygen compressor.The invention discloses the passive piston volume tube of a kind of raster pattern.
The object of the invention is to be achieved through the following technical solutions.
The passive piston volume tube of a kind of raster pattern of the present invention, comprises 1-cylinder body, the piston of the built-in spring of 2-, 3-lift valve, 4-piston rod, 5-return mechanism, 6-line measurement grating scale, 7-detection head, 8-detection head mounting blocks, 9-guide plate, 10-contiguous block, 11-guide rail slide block, 12-orbit of guide rail, 13-guide rail base;
The piston 2 of built-in spring is placed in cylinder body 1 inside; Lift valve 3 is fixedly connected with piston rod 4; Piston rod 4 one end is fixedly connected with guide plate 9 is vertical; The chain link of return mechanism 5 can drive guide plate 9 to move along the axis of cylinder body 1 to diagram right and realize backhaul action; Guide plate 9 and contiguous block 10, guide rail slide block 11 are fixedly connected sequentially; On the upper locating surface that line measurement grating scale 6 and orbit of guide rail 12 are arranged on guide rail base 13 respectively and side-locating face, described guide rail base 13 ensures verticality and the flatness of upper locating surface and side-locating face, for described grating scale 6 and orbit of guide rail 12 provide benchmark by tolerance; Described guide rail base 13 is fixed with cylinder body 1 position, and parallel with piston rod 4.Detection head mounting blocks 8 is fixed on the side of contiguous block 10; Detection head 7 is arranged on detection head mounting blocks 8; Line measurement grating scale 6 is fixed on guide rail base 13 side, and detection head 7 can translation gliding on line measurement grating scale 6.
Described cylinder body is provided with the entrance and exit of liquid, and entrance is positioned on the side casing wall of guide plate, and outlet is positioned on the casing wall on opposite.Entrance is connected with measured stream gauge by pipeline, and outlet is connected with the container for reclaiming trickle.The both sides of the piston of built-in spring are called upstream and downstream two parts, and liquid flows to downstream part by upstream portion.
The course of work of the passive piston volume tube of a kind of raster pattern of the present invention: the displacement utilizing the piston 2 of the built-in spring of line measurement grating measuring, utilizes the continuous dislocation of piston 2 actual motion of built-in spring to calculate the volume that volume pipe discharges liquid.Solution flows into the upstream of cylinder body by the road from measured stream gauge, now lift valve 3 is in closed condition, solution promotes piston 2 rectilinear motion in cylinder body 1 of built-in spring, drive piston rod 4 synchronous operation, when the piston 2 of built-in spring runs with fluid velocity, the detection head 7 of linear grating runs together along with the piston 2 of built-in spring, the displacement of the piston of the built-in spring of real-time measurement and instantaneous velocity, the time of synchro measure reading, the sectional area of the piston 2 of built-in spring is known, by measuring the displacement of the piston 2 of built-in spring, the fluid volume that the piston 2 that can calculate built-in spring is discharged, by measuring the instantaneous velocity of the piston 2 of built-in spring, the instantaneous delivery of fluid can be obtained.By return mechanism 5 drive 9 along cylinder body 1 axis to diagram right move, realize the piston 2 backhaul action of built-in spring.
The passive piston volume tube of a kind of raster pattern of the present invention, can read instantaneous delivery value in real time, can meet the requirement of dynamic flow measurement in measuring process.
The passive piston volume tube of a kind of raster pattern of the present invention, utilize the displacement of line measurement grating measuring piston, volume pipe becomes the flow measurement standard device of capacity, when measuring flow is close to measurement lower limit value, according to the Measuring Time of necessity, the whole stroke of volume pipe is divided into several independently measuring sections, each measuring section can complete independent measurement, all reset operation is carried out like this without the need to measuring at every turn, realize continuous coverage, effectively shorten the time of single measurement, significantly improve the efficiency of single measurement.
The passive piston volume tube of a kind of raster pattern of the present invention, the time shorten of single experiments of measuring under low flow condition, make parameters change in measuring process less, experimental result reliability improves, therefore can reduce the lower limit of volume pipe flow measurement, the useful range of volume pipe is than expanding further.
Beneficial effect
1, the passive piston volume tube of raster pattern of the present invention, adopt the displacement of line measurement grating measuring piston, volume pipe becomes the flow measurement standard device of capacity, measure comparatively low discharge time, shorter measuring distance can be used, the whole stroke of volume pipe can be freely divided into several independent measuring sections, each measuring section can complete independent measurement, all reset operation is carried out like this without the need to measuring at every turn, realize continuous coverage, effectively shorten the time of single measurement, significantly improve the efficiency of single measurement;
2, the passive piston volume tube of raster pattern of the present invention, can read instantaneous delivery value in real time, can meet the requirement of dynamic flow measurement in measuring process;
3, the passive piston volume tube of raster pattern of the present invention, the time shorten of single experiments of measuring under low flow condition, make parameters change in measuring process less, experimental result reliability improves, therefore can reduce the lower limit of volume pipe flow measurement, the useful range of volume pipe is than expanding further.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is measuring mechanism axial view of the present invention.
Wherein, piston, 3-lift valve, 4-piston rod, 5-return mechanism, 6-line measurement grating scale, 7-detection head, 8-detection head mounting blocks, 9-guide plate, 10-contiguous block, 11-guide rail slide block, 12-orbit of guide rail, the 13-guide rail base of 1-cylinder body, the built-in spring of 2-.
Embodiment
Below in conjunction with accompanying drawing and embodiment, following detailed description is done to the present invention.
Embodiment 1
The passive piston volume tube of a kind of raster pattern, comprise cylinder body 1, the piston 2 of built-in spring, lift valve 3, piston rod 4, return mechanism 5, line measurement grating scale 6, detection head 7, detection head mounting blocks 8, guide plate 9, contiguous block 10, guide rail slide block 11, orbit of guide rail 12, guide rail base 13, as shown in Figure 1;
The passive piston volume tube of raster pattern, the internal diameter of its cylinder body 1 is 280mm; Piston 2 effective travel of built-in spring is 600mm; Lift valve 3 external diameter is 210mm; Piston rod 4 external diameter is 30mm; Return mechanism 5 is by AC motor band movable sprocket and chain movement; Effective measurement length of line measurement grating scale 6 is 700mm; The wide 20mm of orbit of guide rail 12, long 700mm; Detection head mounting blocks 8, guide plate 9, contiguous block 10, guide rail base 13 all manufacture with steel.
The piston 2 of built-in spring is placed in cylinder body 1 inside; Lift valve 3 is fixedly connected with piston rod 4; Piston rod 4 one end is fixedly connected with guide plate 9 is vertical; The chain link of return mechanism 5 can drive guide plate 9 to move along the axis of cylinder body 1 to diagram right and realize backhaul action; Guide plate 9 and contiguous block 10, guide rail slide block 11 are fixedly connected sequentially; On the upper locating surface that line measurement grating scale 6 and orbit of guide rail 12 are arranged on guide rail base 13 respectively and side-locating face, described guide rail base 13 ensures verticality and the flatness of upper locating surface and side-locating face, for described grating scale 6 and orbit of guide rail 12 provide benchmark by tolerance; Described guide rail base 13 is fixed with cylinder body 1 position, and parallel with piston rod 4.Detection head mounting blocks 8 is fixed on the side of contiguous block 10; Detection head 7 is arranged on detection head mounting blocks 8; Line measurement grating scale 6 is fixed on guide rail base 13 side, and detection head 7 can translation gliding on line measurement grating scale 6, as shown in Figure 2.
Matching with the inner chamber of cylinder body 1 in the outer ring of piston 2, can move along cylinder body axis, and there is endoporus at piston 2 center; Lift valve 3 is fixedly connected with piston rod 4, and can move along cylinder body axis, lift valve 3 matches with the endoporus of piston 2, moves by it the UNICOM and partition that realize space, piston both sides; Piston rod 4 one end is fixedly connected with guide plate 9 is vertical; Return mechanism 5, by a 0.75kW AC motor band movable sprocket and No. 80 chains, can drive guide plate 9 to move along the axis of cylinder body 1 to diagram right and realize backhaul action; Guide plate 9 and contiguous block 10, guide rail slide block 11 are fixedly connected sequentially; On the upper locating surface that line measurement grating scale 6 and orbit of guide rail 12 are arranged on guide rail base 13 respectively and side-locating face, guide rail base 13 provides benchmark for grating scale 6 and orbit of guide rail 12, ensures the depth of parallelism of all axially-movable component movement.Detection head 7 is fixed on contiguous block 10 by detection head mounting blocks 8, when moving along cylinder body axis direction, reads the numerical value of grating scale thus the shift value of the valve that gets a promotion.
Claims (4)
1. the passive piston volume tube of raster pattern, comprise cylinder body (1), the piston (2) of built-in spring, lift valve (3), it is characterized in that: also comprise piston rod (4), return mechanism (5), line measurement grating scale (6), detection head (7), detection head mounting blocks (8), guide plate (9), contiguous block (10), guide rail slide block (11), orbit of guide rail (12), guide rail base (13); Described cylinder body is provided with the entrance and exit of liquid, and entrance is positioned on the side casing wall of guide plate, and outlet is positioned on the casing wall on opposite; Entrance is connected with measured stream gauge by pipeline; The both sides of the piston of built-in spring are called upstream and downstream two parts, and liquid flows to downstream part by upstream portion; The piston (2) of built-in spring is placed in cylinder body (1) inside; Lift valve (3) is fixedly connected with piston rod (4); Piston rod (4) one end is fixedly connected with guide plate (9) is vertical; The chain link of return mechanism (5) can drive guide plate (9) to move to the right along the axis of cylinder body (1) and realize backhaul action; Guide plate (9) and contiguous block (10), guide rail slide block (11) are fixedly connected sequentially; On the side-locating face that line measurement grating scale (6) and orbit of guide rail (12) are arranged on guide rail base (13) respectively and upper locating surface, described guide rail base (13) ensures verticality and the flatness of upper locating surface and side-locating face, for described grating scale (6) and orbit of guide rail (12) provide benchmark by tolerance; Described guide rail base (13) and cylinder body (1) position are fixed, and parallel with piston rod (4); Detection head mounting blocks (8) is fixed on the side of contiguous block (10); Detection head (7) is arranged on detection head mounting blocks (8); Line measurement grating scale (6) is fixed on guide rail base (13) side, and detection head (7) can in the upper translation gliding of line measurement grating scale (6);
The course of work is, solution flows into the upstream of cylinder body by the road from measured stream gauge, now lift valve (3) is in closed condition, solution promotes piston (2) rectilinear motion in cylinder body (1) of built-in spring, drive piston rod (4) synchronous operation, when the piston (2) of built-in spring runs with fluid velocity, the detection head (7) of linear grating runs together along with the piston (2) of built-in spring, the displacement of the piston of the built-in spring of real-time measurement and instantaneous velocity, the time of synchro measure reading, the sectional area of the piston (2) of built-in spring is known, by measuring the displacement of the piston (2) of built-in spring, the fluid volume that the piston (2) that can calculate built-in spring is discharged, by measuring the instantaneous velocity of the piston (2) of built-in spring, the instantaneous delivery of fluid can be obtained, drive guide plate (9) to move to the right along the axis of cylinder body (1) by return mechanism (5), realize piston (2) the backhaul action of built-in spring.
2. the passive piston volume tube of a kind of raster pattern as claimed in claim 1, it is characterized in that: utilize line measurement grating scale (6) to measure the displacement of piston, volume pipe becomes the flow measurement standard device of capacity, when measuring flow is close to measurement lower limit value, according to the Measuring Time of necessity, the whole stroke of volume pipe is divided into several independently measuring sections, each measuring section can complete independent measurement, all reset operation is carried out like this without the need to measuring at every turn, realize continuous coverage, effectively shorten the time of single measurement, significantly improve the efficiency of single measurement.
3. the passive piston volume tube of a kind of raster pattern as claimed in claim 1, is characterized in that: by reducing the lower limit of volume pipe flow measurement, makes the useful range of volume pipe than expanding further.
4. the passive piston volume tube of a kind of raster pattern as claimed in claim 1, is characterized in that: the outlet of described cylinder body (1) is connected with the container for reclaiming trickle.
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| CN102944293B true CN102944293B (en) | 2016-03-30 |
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| CN104677440A (en) * | 2013-11-28 | 2015-06-03 | 中国航空工业集团公司航空动力控制***研究所 | System and method for measuring flow rate of fuel gas online |
| CN104374450B (en) * | 2014-12-01 | 2018-01-12 | 中国航空工业集团公司北京长城计量测试技术研究所 | The effective power-assisted recuperator means structure of piston volume |
| CN108168639B (en) * | 2017-12-11 | 2019-09-10 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of passive piston volume tube of overturning valve plug type |
| CN109211119A (en) * | 2018-08-16 | 2019-01-15 | 南京福碧源环境技术有限公司 | A kind of piston driving positioning device and method |
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| US4501972A (en) * | 1982-03-01 | 1985-02-26 | Scans Associates, Inc. | Float detection system |
| CN2038624U (en) * | 1988-01-25 | 1989-05-31 | 煤炭工业部煤炭科学研究院重庆研究所 | Tube shape direct-reading type flow meter for measuring instantaneous flow-rate |
| CN1651762A (en) * | 2004-02-06 | 2005-08-10 | 深圳市建恒工业自控***有限公司 | Valume tube continuous metering type delivering pump device |
| CN100507469C (en) * | 2004-11-11 | 2009-07-01 | 深圳市建恒工业自控***有限公司 | Expanding volume tube flow measuring device and realizing method |
| CN101046405B (en) * | 2006-03-31 | 2010-07-28 | 深圳市建恒测控股份有限公司 | Flow meter checking device by standard volume tube method and process |
| CN102288264B (en) * | 2011-07-25 | 2012-09-26 | 浙江省计量科学研究院 | Electric drive piston liquid micro flow measurement standard device |
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