CN201514261U - Plunger-type gas flow calibration device - Google Patents
Plunger-type gas flow calibration device Download PDFInfo
- Publication number
- CN201514261U CN201514261U CN2009201969977U CN200920196997U CN201514261U CN 201514261 U CN201514261 U CN 201514261U CN 2009201969977 U CN2009201969977 U CN 2009201969977U CN 200920196997 U CN200920196997 U CN 200920196997U CN 201514261 U CN201514261 U CN 201514261U
- Authority
- CN
- China
- Prior art keywords
- plunger
- cylinder body
- cover plate
- upper cover
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a plunger-type gas flow calibration device, which includes a frame, an electric cylinder, a plunger piston, a guide sleeve, a cylinder body, an upper cover plate, an encoder and a control system. The electric cylinder comprises a motor, an electric cylinder body and a piston rod and drives the plunger piston to move vertically, the electric cylinder body is in sliding fit with the piston rod, and the plunger piston is fixedly mounted at the top end of the piston rod; the guide sleeve is fixed on the frame, a sealing ring is arranged between the guide sleeve and the plunger piston, the cylinder body is mounted on the guide sleeve, the upper cover plate covers the cylinder body, and a mounting port of a flowmeter to be detected is formed on the cover plate; a sealing cavity is formed among the plunger piston, the guide sleeve, the cylinder body and the upper cover plate; an encoder is mounted below the motor and feeds the position of the plunger piston back to the control system; and the control system consists of an upper compute and a lower computer, controls the motion speed, time and position of the plunger piston, and records the parameters such as pressure and temperature in time. The plunger-type gas flow calibration device is suitable for detecting a critical flow meter, and has the characteristics of reliable work, convenient operation and short detection time.
Description
Technical field
The utility model relates to the flow metering proving installation, especially relates to a kind of plunger type gas flow standard device.
Background technology
PVTt method gas flow standard device is the standard set-up of indirect measurement gas mass rate, is the main standard device of examining and determine the critical flow flowmeter at present.
The piston type gas flow standard set-up is a kind of device of direct measurement gas flow, has the accuracy of measurement height, measuring speed is fast, reliable and stable and easy realization detects advantages such as robotization.For the ease of processing, adopt plunger-type structure, be benchmark with the plunger outer ring.Be applicable to the calibrating of small larynx footpath critical flow flowmeter.
Summary of the invention
The purpose of this utility model provides a kind of based on the plunger type gas flow standard device, and it has precision height, reliable operation, easy to operate, characteristics such as the calibrating time is short, is applicable to the calibrating of critical flow flowmeter.
In order to achieve the above object, the technical solution adopted in the utility model is:
The utility model is that orienting sleeve is installed on the frame, electronic cylinder is made up of motor, electronic cylinder body and piston rod, electronic cylinder body is installed in the frame bottom, the motor of band scrambler is installed outside the bottom of electronic cylinder body, between electronic cylinder body and the piston rod for being slidingly matched, plunger is fixedly mounted on the piston rod top, and electronic cylinder is connected with plunger by piston rod and actuation plunger moves up and down; Be provided with the two seals ring between orienting sleeve inner ring and the plunger, the orienting sleeve side is provided with oil-in and gas feed, gas feed place is provided with electromagnetic gas valve, oil-in is opened between the two seals ring, and O-ring seal is housed in the sealing ring, and gas feed is opened on the two seals ring, the orienting sleeve upper surface is provided with packing ring, one end of cylinder body places on the packing ring, and the other end of cylinder body is connected with upper cover plate through packing ring, forms a seal chamber between plunger, orienting sleeve, cylinder body and the upper cover plate; On upper cover plate, be respectively equipped with the pressure transducer and the temperature sensor that are used for measuring the pressure and temperature in the seal chamber, the upper cover plate center is provided with tested flowmeter installing port, with hold down gag tested flowmeter is fixed, tested flowmeter exit is connected with vacuum pump through pressure transducer, valve.
The beneficial effect that the utlity model has is:
The utility model is a kind of plunger type gas flow standard device, is applicable to the calibrating of critical flow flowmeter, has precision height, reliable operation, easy to operate, characteristics such as the calibrating time is short.
Description of drawings
Accompanying drawing is a general structure principle schematic of the present utility model.
Among the figure: 1, frame, 2, electronic cylinder, 3, plunger, 4, orienting sleeve, 5, O-ring seal, 6, electromagnetic gas valve, 7, gas feed, 8, cylinder body, 9, pressure transducer, 10, temperature sensor, 11, cylinder, 12, go up erecting frame, 13, vacuum pump, 14, valve, 15, pressure transducer, 16, upper cover plate, 17, tested flowmeter, 18, packing ring, 19, oil-in, 20, motor, 21, scrambler.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
As shown in drawings, orienting sleeve 4 is installed on the frame 1, electronic cylinder is made up of motor 20, electronic cylinder body 2, piston rod, electronic cylinder body 2 is installed in frame 1 bottom, the outer bottom of electronic cylinder body 2 is equipped with the motor 20 of band scrambler 21, for being slidingly matched, plunger 3 is fixedly mounted on the piston rod top between electronic cylinder body 2 and the piston rod, and electronic cylinder is connected with plunger 3 by piston rod and actuation plunger 3 moves up and down; Be provided with the two seals ring between orienting sleeve 4 inner rings and the plunger 3, orienting sleeve 4 sides are provided with oil-in 19 and gas feed 7, gas feed place is provided with electromagnetic gas valve 6, oil-in 19 is opened between the two seals ring, O-ring seal 5 is housed in the sealing ring, gas feed 7 is opened on sealing ring, orienting sleeve 4 upper surfaces are provided with packing ring 18, one end of cylinder body 8 places on the packing ring 18, the other end of cylinder body 8 is connected with upper cover plate 16 through packing ring, forms a seal chamber between plunger 3, orienting sleeve 4, cylinder body 8 and the upper cover plate 16; On upper cover plate 16, be respectively equipped with the pressure transducer 9 and the temperature sensor 10 that are used for measuring the pressure and temperature in the seal chamber, upper cover plate 16 centers are provided with tested flowmeter 17 installing ports, with hold down gag tested flowmeter 17 is fixed, tested flowmeter 17 exits are connected with vacuum pump 13 through pressure transducer 15, valve 14.
As shown in drawings, described hold down gag is a cylinder 11, and cylinder 11 is installed in erecting frame 12.The also available leverage of hold down gag or compress with screw mechanism.
As shown in drawings, described cylinder body 8 is made for glass tube, metal tube or by other materials.
Scrambler 21 is installed in motor 20 belows, gives control system with the position feedback of plunger 3; Control system is made of host computer and slave computer, is electrically connected with motor 20.
Principle of work of the present utility model is as follows:
This device is during work, and gas feed place motorized valve 6 is opened, and after vacuum pump 13 was opened, gas entered measured flux meter 16 again by the import cylinder body 8 of flowing through.After motorized valve 6 cut out, vacuum pump 13 began to take out the gas in the seal chamber, and meanwhile, computer control motor 20 (is flow q with a certain speed v
s) drive the screw mandrel rotation, drive the plunger 3 discharge gas that moves upward, the measured flux meter makes it to flow through.Flow q when the plunger exhaust
sEqual tested flowmeter swallowing-capacity q
cThe time, pipe internal pressure P, temperature T are in equilibrium state.If parameters such as control system real time record plunger position, temperature, pressure, humidity are q
sBe not equal to q
c, pressure surge surpasses setting range, and signal feedback is to control system, and control system just can make it finally to reach equilibrium state according to the variation of the parameter v that regulates the speed.
This device is a measuring basis with the plunger outer ring, the flow of plunger exhaust:
q
s＝v×S
In the formula: S---the piston cross-sectional area.
The actual flow formula of critical flow flowmeter:
In the formula: d---the nozzle throat diameter;
C
d---efflux coefficient;
C
*---critical flow;
P
0---the nozzle entrance stagnation pressure;
T
0---the nozzle entrance stagnation temperature;
R---universal gas constant;
The molal weight of M---gas.
Obviously, the flow q of plunger exhaust
sEqual tested flowmeter swallowing-capacity q
c, just can calculate the efflux coefficient of measured flux meter according to the data that record.
Claims (3)
1. plunger type gas flow standard device, it is characterized in that: orienting sleeve (4) is installed on the frame (1), electronic cylinder is made up of motor (20), electronic cylinder body (2) and piston rod, electronic cylinder body (2) is installed in frame (1) bottom, the motor (20) of band scrambler (21) is installed outside the bottom of electronic cylinder body (2), between electronic cylinder body (2) and the piston rod for being slidingly matched, plunger (3) is fixedly mounted on the piston rod top, and electronic cylinder is connected with plunger (3) by piston rod and actuation plunger (3) moves up and down; Be provided with the two seals ring between orienting sleeve (4) inner ring and the plunger (3), orienting sleeve (4) side is provided with oil-in (19) and gas feed (7), gas feed place is provided with electromagnetic gas valve (6), oil-in (19) is opened between the two seals ring, O-ring seal (5) is housed in the sealing ring, gas feed (7) is opened on the two seals ring, orienting sleeve (4) upper surface is provided with packing ring (18), one end of cylinder body (8) places on the packing ring (18), the other end of cylinder body (8) is connected with upper cover plate (16) through packing ring, plunger (3), orienting sleeve (4), form a seal chamber between cylinder body (8) and the upper cover plate (16); On upper cover plate (16), be respectively equipped with the pressure transducer (9) and the temperature sensor (10) that are used for measuring the pressure and temperature in the seal chamber, upper cover plate (16) center is provided with tested flowmeter (17) installing port, with hold down gag that tested flowmeter (17) is fixing, tested flowmeter (17) exit is connected with vacuum pump (13) through pressure transducer (15), valve (14).
2. a kind of plunger type gas flow standard device according to claim 1 is characterized in that: described hold down gag is cylinder (11), and cylinder (11) is installed in erecting frame (12).
3. a kind of plunger type gas flow standard device according to claim 1 is characterized in that: described cylinder body (8) is glass tube or metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201969977U CN201514261U (en) | 2009-09-18 | 2009-09-18 | Plunger-type gas flow calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201969977U CN201514261U (en) | 2009-09-18 | 2009-09-18 | Plunger-type gas flow calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201514261U true CN201514261U (en) | 2010-06-23 |
Family
ID=42485673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201969977U Expired - Lifetime CN201514261U (en) | 2009-09-18 | 2009-09-18 | Plunger-type gas flow calibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201514261U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666670B (en) * | 2009-09-18 | 2010-12-01 | 浙江省计量科学研究院 | Gas flow calibration device based on standard plunger piston |
| CN102243086A (en) * | 2011-04-25 | 2011-11-16 | 钱如树 | Oil-water tow-phase flowmeter |
| CN102393237A (en) * | 2011-11-01 | 2012-03-28 | 浙江省计量科学研究院 | Water meter calibrating device and method for water meter calibration |
| CN109061061A (en) * | 2018-08-02 | 2018-12-21 | 中国电子科技集团公司第二十四研究所 | A kind of fine circuit internal atmosphere testing calibration device |
-
2009
- 2009-09-18 CN CN2009201969977U patent/CN201514261U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666670B (en) * | 2009-09-18 | 2010-12-01 | 浙江省计量科学研究院 | Gas flow calibration device based on standard plunger piston |
| CN102243086A (en) * | 2011-04-25 | 2011-11-16 | 钱如树 | Oil-water tow-phase flowmeter |
| CN102243086B (en) * | 2011-04-25 | 2012-10-10 | 钱如树 | Oil-water tow-phase flowmeter |
| CN102393237A (en) * | 2011-11-01 | 2012-03-28 | 浙江省计量科学研究院 | Water meter calibrating device and method for water meter calibration |
| CN102393237B (en) * | 2011-11-01 | 2012-11-21 | 浙江省计量科学研究院 | Water meter calibrating device and method for water meter calibration |
| CN109061061A (en) * | 2018-08-02 | 2018-12-21 | 中国电子科技集团公司第二十四研究所 | A kind of fine circuit internal atmosphere testing calibration device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100623 Effective date of abandoning: 20090918 |