CN208921248U - A kind of exhaust flow-meter caliberating device - Google Patents
A kind of exhaust flow-meter caliberating device Download PDFInfo
- Publication number
- CN208921248U CN208921248U CN201822072628.9U CN201822072628U CN208921248U CN 208921248 U CN208921248 U CN 208921248U CN 201822072628 U CN201822072628 U CN 201822072628U CN 208921248 U CN208921248 U CN 208921248U
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- China
- Prior art keywords
- exhaust flow
- caliberating device
- meter
- air
- exhaust
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- 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.)
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- Exhaust Silencers (AREA)
- Testing Of Engines (AREA)
Abstract
The utility model discloses a kind of exhaust flow-meter caliberating devices, including air filter, vacuum tank, proving flowmeter, air exhauster, it further include silencer, air heater, the air filter is sequentially connected the vacuum tank, proving flowmeter, air exhauster, silencer, air heater by exhaust pipe, and the output end of the air heater is for connecting flowmeter to be calibrated.The utility model can effectively the exhaust operating condition of simulated engine vehicle, improve the accuracy that exhaust flow-meter is demarcated.
Description
Technical field
The utility model relates to transducer calibration technical fields, more specifically, it relates to which a kind of exhaust flow-meter is demarcated
Device.
Background technique
Exhaust flow-meter will carry out period calibration or inspection in use, to ensure the accuracy of its measurement.Calibration
Device can produce the gas flow of standard, and exhaust flow-meter measured value carries out accuracy judgement in comparison.Currently, exhaust stream
The medium that meter is used in flow calibration or inspection is air, and the temperature of air is lower (50 DEG C of <), traditional caliberating device
As shown in Figure 1, air filter A, flowmeter B to be calibrated, vacuum tank C, proving flowmeter D, air exhauster E are sequentially connected.Exhaust stream
Meter is installed on vehicle in actual work, and the exhaust temperature ranges of vehicle are at 181 DEG C~513 DEG C.This shows exhaust flow-meter reality
The temperature of temperature and calibration (or check) when border uses has a biggish difference, traditional caliberating device can not simulated engine it is whole
The exhaust operating condition of vehicle influences the accuracy of exhaust flow-meter calibration.
Utility model content
The technical problems to be solved in the utility model is the above-mentioned deficiency for the prior art, and the utility model provides one kind
Effectively the exhaust operating condition of simulated engine vehicle, the exhaust flow-meter for the accuracy for improving exhaust flow-meter calibration it can demarcate dress
It sets.
Technical scheme of the utility model is as follows: a kind of exhaust flow-meter caliberating device, including air filter, pressure stabilizing
Tank, proving flowmeter, air exhauster, further include silencer, air heater, and the air filter is sequentially connected by exhaust pipe
The vacuum tank, proving flowmeter, air exhauster, silencer, air heater, the output end of the air heater are used for
Connect flowmeter to be calibrated.
As a further improvement, the air heater includes outer housing and inner housing, set in the inner housing
There is heating chamber, more electrothermal tubes being evenly arranged are equipped in the heating chamber, are equipped with the first temperature in the middle part of the heating chamber
Sensor, the outer housing are equipped with the control cabinet being electrically connected with the electrothermal tube, the first temperature sensor.
Further, the electrothermal tube includes the thermally conductive tube body of hollow structure, is equipped with and institute in the heat conducting pipe body
The heater strip for stating control cabinet connection, sets heat conductive insulating object between the thermally conductive tube body and heater strip.
Further, insulating layer is equipped between the outer housing and inner housing.
Further, the outlet end of the heating chamber is equipped with the second temperature sensor connecting with the control cabinet.
Further, the both ends of the outer housing are respectively provided with the connecting flange for connecting the exhaust pipe.
Further, the silencer is automobile exhaust muffler.
Further, the air exhauster is the roots blower of trilobal cross, and the normal flow is calculated as Venturi tube
Flowmeter.
Beneficial effect
The utility model compared with prior art, has the advantage that are as follows: passes through the input terminal setting in flowmeter to be calibrated
Silencer, air heater, can effectively the exhaust operating condition of simulated engine vehicle, improve the accuracy that exhaust flow-meter is demarcated.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of traditional technology；
Fig. 2 is the structural schematic diagram of the utility model；
Fig. 3 is the main view perspective view of air heater in the utility model；
Fig. 4 is the left view perspective view of air heater in the utility model.
Wherein: 1- air filter, 2- vacuum tank, 3- proving flowmeter, 4- air exhauster, 5- silencer, 6- air heater,
7- flowmeter to be calibrated, 8- outer housing, 9- heating chamber, 10- electrothermal tube, the first temperature sensor of 11-, 12- control cabinet, 13- are protected
Warm layer, 14- second temperature sensor, 15- connecting flange, 16- exhaust pipe, 17- inner housing.
Specific embodiment
Specific embodiment in reference to the accompanying drawing is described further the utility model.
Refering to fig. 1-4, a kind of exhaust flow-meter caliberating device, including air filter 1, vacuum tank 2, proving flowmeter 3, exhaust
Blower 4, further includes silencer 5, air heater 6, and air filter 1 is sequentially connected vacuum tank 2, proving flowmeter by exhaust pipe 16
3, air exhauster 4, silencer 5, air heater 6, the output end of air heater 6 is for connecting flowmeter 7 to be calibrated；Pass through
In the input terminal of flowmeter 7 to be calibrated, silencer 5, air heater 6 are set, can effective simulated engine vehicle exhaust work
Condition, the accuracy for improving exhaust flow-meter calibration.
Air heater 6 includes outer housing 8 and inner housing 17, and heating chamber 9 is equipped in inner housing 17, is equipped in heating chamber 9
More electrothermal tubes 10 being evenly arranged are equipped with the first temperature sensor 11, electrothermal tube 10 and the first temperature sensing in the middle part of heating chamber 9
Device 11 is upward through outer housing 8 and inner housing 17, and outer housing 8 is equipped with electrothermal tube 10, the first temperature sensor 11 electrically
The control cabinet 12 of connection；The thermally conductive tube body of electrothermal tube 10 including hollow structure is equipped in heat conducting pipe body and to connect with control cabinet 12
Heater strip sets heat conductive insulating object between thermally conductive tube body and heater strip；In the present embodiment, thermally conductive tube body is SUS304 seamless pipe,
Thermal conductivity is good, good corrosion resistance, and the material of heater strip is Cr20Ni80, and the thermal efficiency is high, and the service life is long, and heat conductive insulating object is electrician's grade
Magnesia powder, thermal conductivity is good, good insulating, and thermally conductive tube body can increase the heating surface area of air, improves heating speed；Heat conducting pipe
The periphery of body is additionally provided with cooling fin, can further increase the heating surface area of air.
In the present embodiment, outer housing 8 is made of carbon steel, and surface lacquer, to prevent from being corroded, inner housing 17 is 304
Stainless steel is made, and insulating layer 13 is equipped between outer housing 8 and inner housing 17, and insulating layer 13 is aluminium silicate wool, and thermal insulation is good.
The outlet end of heating chamber 9 is equipped with the second temperature sensor 14 connecting with control cabinet 12, passes through the first temperature sensing
The temperature that device 11,14 Real-time Feedback of second temperature sensor are vented can improve the precision that air heater 6 heats air, guarantee
The accuracy of exhaust flow-meter calibration.
The both ends of outer housing 8 are respectively provided with the connecting flange 15 of connection exhaust pipe 16, and air heater 6 is facilitated to pacify
Dress, silencer 5 are automobile exhaust muffler, can play noise reduction and pressure stabilization function, the exhaust work of effective simulated engine vehicle
Condition, the accuracy for improving exhaust flow-meter calibration；Air exhauster 4 is the roots blower of trilobal cross, and capacity is big, the operation is stable,
Proving flowmeter 3 is differential pressure type flowmeter, easy for installation, and detection accuracy is high, and stability is good.
Above-described is only preferred embodiments of the present invention, it should be pointed out that is come for those skilled in the art
It says, under the premise of not departing from the utility model structure, several modifications and improvements can also be made, these all will not influence this reality
With the effect and patent practicability of novel implementation.
Claims (8)
1. a kind of exhaust flow-meter caliberating device, including air filter (1), vacuum tank (2), proving flowmeter (3), air exhauster
(4), it is characterised in that: further include silencer (5), air heater (6), the air filter (1) by exhaust pipe (16) according to
Vacuum tank described in secondary connection (2), proving flowmeter (3), air exhauster (4), silencer (5), air heater (6), it is described
The output end of air heater (6) is for connecting flowmeter to be calibrated (7).
2. a kind of exhaust flow-meter caliberating device according to claim 1, it is characterised in that: the air heater
(6) include outer housing (8) and inner housing (17), be equipped with heating chamber (9) in the inner housing (17), the heating chamber (9)
It is interior to be equipped with the first temperature sensor (11) in the middle part of the heating chamber (9) equipped with more electrothermal tubes (10) being evenly arranged, it is described
Outer housing (8) be equipped with the electrothermal tube (10), the first temperature sensor (11) be electrically connected control cabinet (12).
3. a kind of exhaust flow-meter caliberating device according to claim 2, it is characterised in that: electrothermal tube (10) packet
The thermally conductive tube body of hollow structure is included, the heater strip connecting with the control cabinet (12) is equipped in the heat conducting pipe body, it is described
Heat conductive insulating object is set between thermally conductive tube body and heater strip.
4. a kind of exhaust flow-meter caliberating device according to claim 2, it is characterised in that: the outer housing (8) with
Insulating layer (13) are equipped between inner housing (17).
5. a kind of exhaust flow-meter caliberating device according to claim 2, it is characterised in that: the heating chamber (9) goes out
Mouth end is equipped with the second temperature sensor (14) connecting with the control cabinet (12).
6. a kind of exhaust flow-meter caliberating device according to claim 2, it is characterised in that: the two of the outer housing (8)
End is respectively provided with the connecting flange (15) for connecting the exhaust pipe (16).
7. a kind of exhaust flow-meter caliberating device according to claim 1, it is characterised in that: the silencer (5) is
Automobile exhaust muffler.
8. a kind of exhaust flow-meter caliberating device described in -7 any one according to claim 1, it is characterised in that: the row
Gas blower (4) is the roots blower of trilobal cross, and the proving flowmeter (3) is differential pressure type flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822072628.9U CN208921248U (en) | 2018-12-11 | 2018-12-11 | A kind of exhaust flow-meter caliberating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822072628.9U CN208921248U (en) | 2018-12-11 | 2018-12-11 | A kind of exhaust flow-meter caliberating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208921248U true CN208921248U (en) | 2019-05-31 |
Family
ID=66712802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822072628.9U Active CN208921248U (en) | 2018-12-11 | 2018-12-11 | A kind of exhaust flow-meter caliberating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208921248U (en) |
-
2018
- 2018-12-11 CN CN201822072628.9U patent/CN208921248U/en active Active
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