CN207816420U - A kind of bell-jar gas flow calibrating installation - Google Patents
A kind of bell-jar gas flow calibrating installation Download PDFInfo
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- CN207816420U CN207816420U CN201820284342.4U CN201820284342U CN207816420U CN 207816420 U CN207816420 U CN 207816420U CN 201820284342 U CN201820284342 U CN 201820284342U CN 207816420 U CN207816420 U CN 207816420U
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Abstract
The utility model is related to a kind of bell-jar gas flow calibrating installation, liquid bath is mounted on the base, and bell jar suspension is installed in liquid bath, and sealing fluid is housed in liquid bath, and liquid bath center is equipped with gas-guide tube, and gas-guide tube upper end extends in bell jar, more than sealing fluid liquid level；Bell jar top is lifted by compensation mechanism；The multiple guide posts of liquid bath upper edge side right angle setting, bell jar upper edge are contacted by multiple outer guide wheels with the rolling of multiple guide posts；Also there is centering machine, including inner guide pulley holder and inner guide pulley, inner guide pulley holder are fixed in bell jar lower inner wall, gas-guide tube is passed through by inner guide pulley carriage center position, and multiple inner guide pulleys are installed on inner guide pulley carriage center position, are in rolling contact with gas-guide tube.The utility model utilizes the gravity of bell jar, the buoyancy of the gravity of balance weight, the quadrant balancing force during exercise of compensation mechanism and sealing fluid, so that bell jar makees vertical uniform motion, the equipment for obtaining the gas output of pressure stability, improves to neutral and accuracy of detection.
Description
Technical field
The utility model is related to a kind of gas flow standard calibrating installation, specially a kind of bell-jar gas flow calibrating dress
It sets.
Background technology
Bell-jar gas flow standard equipment be gas flow Transfer Standards and gas flow meter calibrating capital equipment it
One.Bell-jar gas flow standard equipment makees medium with gas, is mainly used for examining and determine gas flowmeter, test.With
Expanding economy, it is a large amount of with rate-adaptive pacemaker and by experiment determine the flowmeter of instrument coefficient for example turbine, vortex street, precession vortex,
The application such as electromagnetic flowmeter with rate-adaptive pacemaker is more and more extensive.
Existing bell-jar gas flow standard equipment is to neutral poor, it cannot be guaranteed that bell jar uniform descent, is unable to reach peace
Precision is filled, and causes occur the overproof one of the major reasons of pressure oscillation in calibrating；Synchronization encoders are installed on pulley spindle,
Steel wire rope easily skids to generate and throw switch, and keeps prohibited data detection true.
Utility model content
For bell-jar gas flow calibrating installation in the prior art exist to it is neutral it is poor, prohibited data detection is true etc. no
Foot, problem to be solved in the utility model are to provide a kind of bell-jar gas flow calibrating installation that accuracy of detection can be improved.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of bell-jar gas flow calibrating installation of the utility model, including pedestal, liquid bath, bell jar, wherein liquid bath are installed
In on pedestal, bell jar suspension is installed in liquid bath, and sealing fluid is housed in liquid bath, and liquid bath center is equipped with gas-guide tube, gas-guide tube upper end
Portion extends in bell jar, more than sealing fluid liquid level；Bell jar top is lifted by compensation mechanism.
The multiple guide posts of liquid bath upper edge side right angle setting, bell jar upper edge are connect by multiple outer guide wheels and the rolling of multiple guide posts
It touches.
The utility model also has centering machine, including inner guide pulley holder and inner guide pulley, inner guide pulley holder are fixed on bell jar
In lower inner wall, gas-guide tube is passed through by inner guide pulley carriage center position, and multiple inner guide pulleys are installed on inner guide pulley carriage center position,
It is in rolling contact with gas-guide tube.
Compensation mechanism includes pulley assembly, steel wire rope, balancing pole and counterweight, and wherein pulley assembly is installed on guide post
On the crossbeam at end, one end of balancing pole is hinged on liquid bath upper edge side, and the other end of balancing pole is connect with steel wire rope, and steel wire rope is logical
It crosses at the top of pulley assembly and bell jar and connect；Weights is adapted to be mounted and fixed on balancing pole.
The utility model also has balance weight, by being connect at the top of another steel cable and pulley assembly and bell jar.
The utility model also has synchronization encoders, and on the plate that crossbeam is leant out, a friction pulley and encoder axis are same
Axis connection, while friction pulley is in rolling contact with steel wire rope.
Gas-guide tube uses U-tube, and a vertical tube of U-tube is installed on liquid bath center, cross tube sections from pedestal place out to
Upper extension forms external vertical tube, output control valve is installed on external vertical tube.
The utility model has the advantages that and advantage：
1. the utility model is mended using the quadrant during exercise of the gravity of bell jar, the gravity of balance weight, compensation mechanism
It repays under the comprehensive force effect such as buoyancy of power and sealing fluid so that bell jar makees the principle of vertical uniform motion, pressure is obtained with this
The equipment of stable gas output, improves to neutral and accuracy of detection.
2. synchronization encoders are installed on steel wire rope by the utility model, the problem of throwing switch is avoided, makes detection data more
Accurately,
3. the utility model environment temperature control within 20 DEG C ± 5, operating pressure be less than 10kPa under conditions of,
For maximum stream flow up to 2000m3/h or more, the accuracy of bell-jar gas flow standard equipment is better than ± 0.5%, if improving environment
Control requires, then reachable (0.05~0.2) % of accuracy,
Description of the drawings
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the lateral plan of Fig. 1.
Wherein, 1 is pedestal, and 2 be liquid bath, and 201 be sealing fluid, and 3 be the first output control valve, and 4 be inner guide pulley holder, 5
It is scale for sighting device, 6,7 be outer guide wheel, and 8 be guide post, and 9 be first pulley, and 10 be second pulley, and 11 be steel wire rope, and 12 be flat
Weigh bar, and 13 be counterweight, and 14 be liquid level gauge, and 15 be balance weight, and 16 be wind turbine, and 17 be solenoid valve, and 19 be synchronization encoders, and 20 are
Bell jar, 201 be sealing fluid, and 21 be gas-guide tube, and 22 be the first inner guide pulley, and 23 be the second inner guide pulley,
Specific implementation mode
The utility model is further elaborated with reference to the accompanying drawings of the specification.
As shown in Figure 1, 2, a kind of bell-jar gas flow calibrating installation of the utility model, including pedestal 1, liquid bath 2, bell jar
20, wherein liquid bath 2 is installed on pedestal 1, and the suspension of bell jar 20 is installed in liquid bath 2, and sealing fluid, 2 center of liquid bath are housed in liquid bath 2
Equipped with gas-guide tube 21,21 upper end of gas-guide tube extends in bell jar 20, more than 201 liquid level of sealing fluid；20 top of bell jar passes through benefit
Repay mechanism lifting.
The 20 multiple guide posts 8 of upper edge side right angle setting of liquid bath, 20 upper edge of bell jar pass through multiple outer guide wheels 7 and multiple guide posts 8
Rolling contacts.The present embodiment uses 2 guide posts 8 and two outer guide wheels 7, ensures that bell jar 20 does not deviate in vertical direction.
The utility model also has centering machine, including inner guide pulley holder 4 and inner guide pulley, is fixed on 20 lower inner wall of bell jar
On, gas-guide tube 21 is passed through by 4 centre of inner guide pulley holder, and multiple inner guide pulleys are installed on inner guide pulley carriage center position, and is led
Tracheae 21 is in rolling contact.The present embodiment uses three inner guide pulleys (visible first and second inner guide pulley 22,23 in Fig. 2), three inner guide pulleys
It is slided in air guide pipe outer wall, prevents the central shaft of bell jar 20 from deviating, further ensure bell jar 20 to neutrality.
Compensation mechanism includes pulley assembly (being made of the first and second sliding 9,10), steel wire rope 11, balancing pole 12 and counterweight
13, wherein pulley assembly is installed on the crossbeam of 8 upper end of guide post, and balancing pole 12 is horizontal positioned, and one end is fixed on 2 upper edge of liquid bath
Side, the other end are connect with steel wire rope 11, and steel wire rope 11 is connect by pulley assembly with 20 top of bell jar；Counterweight 13 is slidably installed
In on balancing pole 12；Also there is balance weight 15, connect, balanced with 20 top of bell jar by another steel cable and pulley assembly
Weight 15 is equivalent to the counterweight of bell jar 20；Also there are synchronization encoders 19, on the plate that crossbeam is leant out, a friction pulley and volume
Code device 19 is coaxially connected, while friction pulley is in rolling contact with steel wire rope 11.
Wheel diameter rub with respect to pulley very little, is unlikely to throw switch, and increases sensitive, small friction pulley and steel wire rope are rolled and connect
It touches, can reflect the displacement of bell jar by the displacement of steel wire rope and be uploaded to host computer carrying out data analysis.
In the present embodiment, gas-guide tube uses U-tube, a vertical tube of U-tube to be installed on liquid bath center, and cross tube sections are the bottom of by
Seat, which places out, to be upwardly extended, and forms external vertical tube, output control valve is installed on external vertical tube.
The utility model bell-jar gas flow standard equipment is charged by gas-guide tube 21 into bell jar 20 using wind turbine 16
After the gas of certain volume amount, open corresponding output regulating valve (the first and second output control valve 301,302), as with
The gravity and compensation mechanism of the balance weight 15 of weight are offset under the action of 201 buoyancy of sealing fluid so that bell jar 20 is in gravity
Under make vertical uniform motion, and the adjusting by exporting control valve is defeated to obtain the gas of the certain standard amount of pressure stability
Go out.When process Installation is debugged, the position of counterweight 13 on balancing pole 12 is adjusted, it is then fixed, for compensating under buoyancy
The speed that caused bell jar 20 moves up and down ensures about 20 uniform motion of bell jar so that measurement data is steady.
The utility model using its own gravity of bell jar 20, the gravity of balance weight 15, compensation mechanism during exercise as
So that bell jar 20 makees the principle of vertical uniform motion, with this under the comprehensive force effect such as buoyancy of limit balancing force and sealing fluid 201
The equipment that gas to obtain pressure stability exports；And utilize senders mechanism or the synchronization encoders such as temperature sensor, sighting device 5
The information transferring elements such as 19 obtain the gas output of standard.
By environment temperature control within 20 DEG C ± 5, operating pressure is less than under conditions of 10kPa, and maximum stream flow is reachable
The accuracy of 2000m3/h or more, bell-jar gas flow standard equipment are better than ± 0.5%, if improving environmental Kuznets Curves requirement,
Accuracy is up to (0.05~0.2) %.
Claims (7)
1. a kind of bell-jar gas flow calibrating installation, it is characterised in that：Including pedestal, liquid bath, bell jar, wherein liquid bath is installed on
On pedestal, bell jar suspension is installed in liquid bath, and sealing fluid is housed in liquid bath, and liquid bath center is equipped with gas-guide tube, gas-guide tube upper end
It extends in bell jar, more than sealing fluid liquid level；Bell jar top is lifted by compensation mechanism.
2. bell-jar gas flow calibrating installation according to claim 1, it is characterised in that：Vertically pacify liquid bath upper edge side
Multiple guide posts are filled, bell jar upper edge is contacted by multiple outer guide wheels with the rolling of multiple guide posts.
3. bell-jar gas flow calibrating installation according to claim 1, it is characterised in that：Also there is centering machine, packet
Inner guide pulley holder and inner guide pulley are included, inner guide pulley holder is fixed in bell jar lower inner wall, and gas-guide tube is by inner guide pulley carriage center portion
Position passes through, and multiple inner guide pulleys are installed on inner guide pulley carriage center position, are in rolling contact with gas-guide tube.
4. bell-jar gas flow calibrating installation according to claim 1, it is characterised in that：Compensation mechanism includes pulley blocks
Part, steel wire rope, balancing pole and counterweight, wherein pulley assembly are installed on the crossbeam of guide post upper end, one end hinge of balancing pole
It is connected on liquid bath upper edge side, the other end of balancing pole is connect with steel wire rope, and steel wire rope at the top of pulley assembly and bell jar by connecting；
Weights is adapted to be mounted and fixed on balancing pole.
5. bell-jar gas flow calibrating installation according to claim 4, it is characterised in that：Also there is balance weight, lead to
It crosses at the top of another steel cable and pulley assembly and bell jar and connect.
6. bell-jar gas flow calibrating installation according to claim 4, it is characterised in that：Also there are synchronization encoders,
On the plate that crossbeam is leant out, a friction pulley and encoder axis are coaxially connected, while friction pulley is in rolling contact with steel wire rope.
7. bell-jar gas flow calibrating installation according to claim 1, it is characterised in that：Gas-guide tube uses U-tube, U
One vertical tube of type pipe is installed on liquid bath center, and cross tube sections are placed out by pedestal and upwardly extended, and forms external vertical tube, and outside is perpendicular
Installation output control valve on pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820284342.4U CN207816420U (en) | 2018-02-28 | 2018-02-28 | A kind of bell-jar gas flow calibrating installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820284342.4U CN207816420U (en) | 2018-02-28 | 2018-02-28 | A kind of bell-jar gas flow calibrating installation |
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| Publication Number | Publication Date |
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| CN207816420U true CN207816420U (en) | 2018-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820284342.4U Active CN207816420U (en) | 2018-02-28 | 2018-02-28 | A kind of bell-jar gas flow calibrating installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503942A (en) * | 2021-07-24 | 2021-10-15 | 上海鹤吉自动化仪表有限公司 | Gas flowmeter detection device and detection method using detection device |
-
2018
- 2018-02-28 CN CN201820284342.4U patent/CN207816420U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503942A (en) * | 2021-07-24 | 2021-10-15 | 上海鹤吉自动化仪表有限公司 | Gas flowmeter detection device and detection method using detection device |
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