CN203011497U - Multi-piston array type gas flow calibration device - Google Patents
Multi-piston array type gas flow calibration device Download PDFInfo
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- CN203011497U CN203011497U CN 201320018926 CN201320018926U CN203011497U CN 203011497 U CN203011497 U CN 203011497U CN 201320018926 CN201320018926 CN 201320018926 CN 201320018926 U CN201320018926 U CN 201320018926U CN 203011497 U CN203011497 U CN 203011497U
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Abstract
The utility model discloses a multi-piston array type gas flow calibration device which comprises N (N is not less than 2) piston systems with the same structure, wherein the gas outlet pipelines of the piston systems form a main gas outlet pipeline; and a buffer tank, a test meter, a manual ball valve, a three-way valve and a vacuum pump are mounted on the main gas outlet pipeline in sequence. According to the gas flow calibration device, various working modes, namely a single-cylinder running mode, a multi-cylinder running mode and a multi-cylinder alternate running mode can be adopted according to the characteristics and the uncertainty requirements of the test meter; the flow range of the test meter and the upper limit of the calibrated flow can be effectively increased; meanwhile, the volume of single piston cylinder is realized by a plurality of small piston cylinders, so that the processing difficulty of the piston cylinder is lowered; and the gas flow calibration device has the characteristics of wide application range, large flow range, reliability for working, simplicity for processing and the like, and can be used for metering liquid flow through a simple modification.
Description
Technical field
The utility model relates to a kind of gas flow standard device, especially relates to a kind of many pistons array gas flow standard device that is applicable to the multiple gases meter proof.
Background technology
Gas flow standard device refers to provide the measuring equipment of accurate air flow value, is used for the gas flow instrument is examined and determine and calibrated, and its main Types has bell-jar, pVTt method, soap film type, weighing method, piston type and method of standard table etc.Along with appearance and the more and more high present situation of flowmeter accuracy level of new flowmeter, people have had higher requirement to gas flow standard device.
Piston-type gas flow standard device is to belong in volumetric method based on the emerging gas flow standard device of a class of kinetic measurement principle, because it has that precision is high, stability of flow, working pressure can be in harmonious proportion automatic control efficiency advantages of higher, obtained recently very fast development decades.Existing piston-type gas flow standard device adopts the design of single-piston cylinder, and its maximum calibrating flow will be subject to the piston cylinder capacity limitation, and flow range is narrower.
Summary of the invention
In order to solve the problem that exists in background technology, the purpose of this utility model is to provide a kind of many pistons array gas flow standard device.
In order to achieve the above object, the technical solution adopted in the utility model is:
The utility model comprises the identical N of structure＞=2 piston systems, its separately outlet pipe converge into a total outlet pipe, on total outlet pipe, surge tank, tested table, manual ball valve, T-valve and vacuum pump are installed successively.
The N that described structure is identical＞=2 piston system: all comprise motor, top board, guide plate, guide pole, piston cylinder, piston, outlet pipe, air outlet valve, air inlet pipeline, gas admittance valve, piston flange lid, piston seal, leading screw, piston rod, rolling bearing, feed screw nut, shaft coupling and a plurality of pressure transducer and a plurality of temperature sensor; Airtight working chamber of the common composition of piston flange lid of piston, piston cylinder and lower surface; Piston rod and piston connect by screw element; Motor connects with leading screw by shaft coupling; Feed screw nut is fixedly mounted on guide plate by screw element; Piston rod is enclosed within outside leading screw, is fixedly connected by flange and guide plate; Between piston cylinder upper surface and top board, along four support bars of even circumferential distributing installation, wherein two relative support bars are simultaneously as guide pole; On two guide poles, each cover has a rolling bearing, and two rolling bearings and guide plate are fixedly connected; The piston flange of piston cylinder lower surface covers and has air admission hole and venthole, and air admission hole and air outlet hole mouth be connecting pipeline respectively, is separately installed with gas admittance valve and air outlet valve on air inlet pipeline and outlet pipe; Outside piston week is one ring seal groove of even distribution and twice wear ring groove upward, respectively in order to piston seal and wear ring to be installed; Respectively have tapped through hole take the piston axis as symcenter both sides on piston, the axis of tapped through hole is parallel with the piston axis, and two temperature sensors are arranged in tapped through hole by thread seal separately respectively; Piston cylinder has tapped through hole near on the sidewall of lower surface, by thread seal setting pressure sensor; Have tapped through hole on the outlet pipe sidewall, by the thread seal mounting temperature sensor.
The beneficial effect that the utlity model has:
1. the utility model can adopt multiple-working mode according to tested table characteristics: single cylinder operational mode, multi-cylinder be operational mode and multi-cylinder alternate run pattern simultaneously.
2. the utility model can effectively be expanded tested flow-meter scope, improve the calibrating flow upper limit.
3. the utility model utilizes several valve piston cylinders to realize the volume of single large piston cylinder, has reduced the piston cylinder difficulty of processing.
4. the utlity model has applied widely, flow range is large, reliable operation is easy to the characteristics such as processing, namely can be used for the metering of fluid flow through simple transformation.
Description of drawings
Fig. 1 is overall schematic of the present utility model.
Fig. 2 is the cross-sectional schematic of single piston system in the utility model.
In figure: 1, tested table, 2, manual ball valve, 3, T-valve, 4, vacuum pump, 5, surge tank, 6, motor, 7, top board, 8, guide plate, 9, guide pole, 10, piston cylinder, 11, piston, 12, pressure transducer, 13, outlet pipe, 14, air outlet valve, 15, air inlet pipeline, 16, gas admittance valve, 17, piston flange lid, 18, temperature sensor, 19, piston seal, 20, leading screw, 21, piston rod, 22, rolling bearing, 23, feed screw nut, 24, shaft coupling.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the utility model comprises the identical N of structure＞=2 piston systems, its separately outlet pipe converge into a total outlet pipe, on total outlet pipe, surge tank 5, tested table 1, manual ball valve 2, T-valve 3 and vacuum pump 4 are installed successively.
As shown in Figure 1 and Figure 2, the individual piston system of N (N＞=2) adopts the mode of parallel array to arrange installation, and separately outlet pipe 13, air outlet valve 14 and air inlet pipeline 15, gas admittance valve 16 are all arranged below each piston system; Outlet pipe 13 is coaxial with piston cylinder 10.
As shown in Figure 1, on total outlet pipe, surge tank 5, tested table 1, manual ball valve 2, T-valve 3 and vacuum pump 4 are installed successively; Manual ball valve 2 is in order to the whole gas circuit of opening and closing; During calibrating critical flow flowmeter, T-valve 3 is connected vacuum pump 4 place pipelines; During other flowmeters of calibrating gas, T-valve 3 is connected ambient atmosphere.
As shown in Figure 2, the N that described structure is identical＞=2 piston systems: all comprise motor 6, top board 7, guide plate 8, guide pole 9, piston cylinder 10, piston 11, outlet pipe 13, air outlet valve 14, air inlet pipeline 15, gas admittance valve 16, piston flange lid 17, piston seal 19, leading screw 20, piston rod 21, rolling bearing 22, feed screw nut 23, shaft coupling 24 and a plurality of pressure transducer 12 and a plurality of temperature sensor 18; Airtight working chamber of piston flange lid 17 common compositions of piston 11, piston cylinder 10 and lower surface; Piston rod 21 and piston 11 connect by screw element; Motor 6 connects with leading screw 20 by shaft coupling 24; Feed screw nut 23 is fixedly mounted on guide plate 8 by screw element; Piston rod 21 is enclosed within outside leading screw 20, is fixedly connected by flange and guide plate 8; Between piston cylinder 10 upper surfaces and top board 7, along four support bars of even circumferential distributing installation, wherein two relative support bars are simultaneously as guide pole 9; On two guide poles 9, each cover has 22, two rolling bearings of a rolling bearing 22 and guide plate 8 to be fixedly connected; Have air admission hole and venthole on the piston flange lid 17 of piston cylinder 10 lower surfaces, air admission hole and air outlet hole mouth be connecting pipeline respectively, is separately installed with gas admittance valve 16 and air outlet valve 14 on air inlet pipeline 15 and outlet pipe 13; One ring seal groove of even distribution and twice wear ring groove on piston 11 excircles are respectively in order to install piston seal 19 and wear ring; Respectively have tapped through hole take the piston axis as symcenter both sides on piston 11, the axis of tapped through hole is parallel with the piston axis, and two temperature sensors 18 are arranged in tapped through hole by thread seal separately respectively, in order to measure the interior temperature of piston cylinder 10; Piston cylinder 10 has tapped through hole near on the sidewall of lower surface, by thread seal setting pressure sensor 12; Have tapped through hole on outlet pipe 13 sidewalls, by thread seal mounting temperature sensor 18.
Principle of work of the present utility model is as follows:
This many pistons array gas flow standard device has three kinds of mode of operations, is respectively: single cylinder operational mode, multi-cylinder be operational mode and multi-cylinder alternate run pattern simultaneously.When tested flowmeter flow hour, can adopt the single cylinder operational mode; When tested flowmeter flow is larger, can adopt multi-cylinder operational mode and multi-cylinder alternate run pattern simultaneously.Multi-cylinder simultaneously operational mode refer to choose N in piston system k(1 ﹤ k＜=N) individual piston system moves simultaneously, jointly produces the gas of normal flow.Multi-cylinder alternate run pattern refers to choose N the 2m in piston system, and (the individual piston system of 1＜=m＜=N/2) is divided into two groups that quantity equates with it; During work, two groups of piston system alternate runs produce the gas of normal flow continuously.The utility model has effectively been expanded tested flow-meter scope, has improved simultaneously the piston type flow standard device calibrating flow upper limit, namely can be used for the metering of fluid flow through simple transformation.
Above-mentioned embodiment is used for the utility model of explaining; rather than the utility model is limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.
Claims (2)
1. the gas flow standard device of piston array more than one kind, it is characterized in that: comprise the identical N of structure＞=2 piston systems, its separately outlet pipe converge into a total outlet pipe, on total outlet pipe, surge tank (5), tested table (1), manual ball valve (2), T-valve (3) and vacuum pump (4) are installed successively.
2. a kind of many pistons array gas flow standard device according to claim 1, it is characterized in that: the N that described structure is identical＞=2 piston system: all comprise motor (6), top board (7), guide plate (8), guide pole (9), piston cylinder (10), piston (11), outlet pipe (13), air outlet valve (14), air inlet pipeline (15), gas admittance valve (16), piston flange lid (17), piston seal (19), leading screw (20), piston rod (21), rolling bearing (22), feed screw nut (23), shaft coupling (24) and a plurality of pressure transducer (12) and a plurality of temperature sensor (18), the piston flange lid (17) of piston (11), piston cylinder (10) and lower surface forms an airtight working chamber jointly, piston rod (21) and piston (11) connect by screw element, motor (6) connects with leading screw (20) by shaft coupling (24), feed screw nut (23) is fixedly mounted on guide plate (8) by screw element, piston rod (21) is enclosed within outside leading screw (20), is fixedly connected by flange and guide plate (8), between piston cylinder (10) upper surface and top board (7), along four support bars of even circumferential distributing installation, wherein two relative support bars are simultaneously as guide pole (9), two guide poles (9) Shang Getao has a rolling bearing (22), and two rolling bearings (22) are fixedly connected with guide plate (8), have air admission hole and venthole on the piston flange lid (17) of piston cylinder (10) lower surface, air admission hole and air outlet hole mouth be connecting pipeline respectively, is separately installed with gas admittance valve (16) and air outlet valve (14) on air inlet pipeline (15) and outlet pipe (13), one ring seal groove of even distribution and twice wear ring groove on piston (11) excircle are respectively in order to install piston seal (19) and wear ring, piston (11) is upper respectively has tapped through hole take the piston axis as symcenter both sides, and the axis of tapped through hole is parallel with the piston axis, and two temperature sensors (18) are arranged in tapped through hole by thread seal separately respectively, piston cylinder (10) has tapped through hole near on the sidewall of lower surface, by thread seal setting pressure sensor (12), have tapped through hole on outlet pipe (13) sidewall, by thread seal mounting temperature sensor (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320018926 CN203011497U (en) | 2013-01-15 | 2013-01-15 | Multi-piston array type gas flow calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320018926 CN203011497U (en) | 2013-01-15 | 2013-01-15 | Multi-piston array type gas flow calibration device |
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| Publication Number | Publication Date |
|---|---|
| CN203011497U true CN203011497U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320018926 Expired - Fee Related CN203011497U (en) | 2013-01-15 | 2013-01-15 | Multi-piston array type gas flow calibration device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090934A (en) * | 2013-01-15 | 2013-05-08 | 中国计量学院 | Multi-piston arraying type gas flow standard device |
| CN105486813A (en) * | 2015-12-28 | 2016-04-13 | 华中农业大学 | Multifunctional closed small animal feeding experiment system |
| CN106017852A (en) * | 2016-05-17 | 2016-10-12 | 中国人民解放军63820部队吸气式高超声速技术研究中心 | Parallel wind tunnel extruding air supply system |
-
2013
- 2013-01-15 CN CN 201320018926 patent/CN203011497U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090934A (en) * | 2013-01-15 | 2013-05-08 | 中国计量学院 | Multi-piston arraying type gas flow standard device |
| CN105486813A (en) * | 2015-12-28 | 2016-04-13 | 华中农业大学 | Multifunctional closed small animal feeding experiment system |
| CN105486813B (en) * | 2015-12-28 | 2017-06-16 | 华中农业大学 | Multi-functional sealing type small-sized animal feeding experimental system |
| CN106017852A (en) * | 2016-05-17 | 2016-10-12 | 中国人民解放军63820部队吸气式高超声速技术研究中心 | Parallel wind tunnel extruding air supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130619 Termination date: 20150115 |
|
| EXPY | Termination of patent right or utility model |