CN109738598B - A kind of exhaust pipe and its tail gas acquire measuring device - Google Patents
A kind of exhaust pipe and its tail gas acquire measuring device Download PDFInfo
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- CN109738598B CN109738598B CN201910259366.3A CN201910259366A CN109738598B CN 109738598 B CN109738598 B CN 109738598B CN 201910259366 A CN201910259366 A CN 201910259366A CN 109738598 B CN109738598 B CN 109738598B
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Abstract
The invention discloses a kind of tail gas to acquire measuring device, including ring pipe, first tube body and the second tube body, third through-hole is offered on ring pipe, first tube body is inserted into ring pipe, first tube body is stuck on ring pipe under the elastic force effect of the first elastic device, first through hole is offered on first tube body, second tube body is inserted into ring pipe, second tube body is stuck on ring pipe under the elastic force effect of the second elastic device, the second through-hole is offered on second tube body, the top of second tube body is provided with the holding tank for accommodating measurement sensor, holding tank is connected to the second cavity, gas mixer is provided in holding tank, fifth hole is offered on the side wall of holding tank, spring leaf is capped on the outside of fifth hole.It is able to solve the low problem with stability difference of conventional exhaust contaminant measurement device measurement accuracy, while having both lower fluid resistance loss.The invention also discloses a kind of exhaust pipes using above-mentioned tail gas acquisition measuring device.
Description
Technical field
The present invention relates to Tail gas measuring technical fields more particularly to a kind of exhaust pipe and its tail gas to acquire measuring device.
Background technique
Currently, the biography for thering is engine to be mounted with some measurement exhaust gas components on exhaust after treatment system or gas exhaust piping
Sensor, such as PM sensor and ammoniacal sensor, effect are the pollutant concentration measured in tail gas, accurate measurement result energy
Enough ensure effective work of emission control systems and emission monitoring system.Therefore, emission measuring device must have higher
Measuring accuracy and stronger functional reliability, while the device can't cause biggish flow losses.
These present sensors are mostly directly installed in the tail gas stream of engine.This technical solution has apparent lack
It falls into, precisely due to engines tail air-flow is unstable, exhaust gas constituents are unevenly distributed the value inaccuracy for leading to sensor measurement, cause
There is very big deviation in measurement value sensor, and maximum deviation is even more than 50%, the use of sensor has been seriously affected, after giving
The accuracy and reliability of processing calibration and OBD monitoring cause adverse effect.
Therefore, a kind of tail gas acquisition measuring device how is provided, to solve conventional exhaust contaminant measurement device measurement essence
Low and stability difference problem is spent, while having both lower fluid resistance loss, is that current those skilled in the art are urgently to be resolved
The technical issues of.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of tail gas to acquire measuring device, to solve conventional exhaust pollution
The low problem with stability difference of object measuring device accuracy, while having both lower fluid resistance loss.Of the invention is another
It is designed to provide a kind of exhaust pipe using above-mentioned tail gas acquisition measuring device.
In order to achieve the above object, the invention provides the following technical scheme:
A kind of tail gas acquires measuring device, including ring pipe, the first tube body and the second tube body, has ring in the ring pipe
Shape chamber has the first cavity in first tube body, has the second cavity in second tube body；
Wherein, the third through-hole being connected to the annular chamber is offered on the side wall of the ring pipe；
The end of first tube body is inserted into the ring pipe and first cavity is connected to the annular chamber, described
The first elastic device is provided between the end of first tube body and the inner wall of the annular chamber, in the bullet of first elastic device
Power effect under, first tube body is stuck on the ring pipe, the top of first tube body be provided with for exhaust pipe
First connecting plate of inner wall connection, offers the first through hole being connected to first cavity on the side wall of first tube body；
The end of second tube body is inserted into the ring pipe and second cavity is connected to the annular chamber, described
The second elastic device is provided between the end of second tube body and the inner wall of the annular chamber, in the bullet of second elastic device
Power effect under, second tube body is stuck on the ring pipe, the top of second tube body be provided with for exhaust pipe
Second connecting plate of inner wall connection offers second for be connected to second cavity on the side wall of second tube body and leads to
Hole；
The top of second tube body is provided with the holding tank for accommodating measurement sensor, the holding tank and described the
Two cavitys are connected to, and offer fourth hole on second connecting plate, the fourth hole is connected to the holding tank, the appearance
It receives and is provided with gas mixer in slot；
Fifth hole is offered on the side wall of the holding tank, is capped with spring leaf on the outside of the fifth hole.
Preferably, it is provided with the first socket on above-mentioned ring pipe, is provided with the first groove on first socket, described
The end of one tube body is provided with first boss, and first tube body is inserted into first socket, and the first boss is described in
First groove enters in the annular chamber and blocks after first tube body rotation, on the inner wall of the end of first tube body
It is provided with first annular groove, first elastic device, first elastic device are built-in in the first annular groove
The other end be fixed on the inner wall of the annular chamber, first elastic device elastic force effect under, first tube body
Compression is stuck on the ring pipe.
Preferably, it is provided with the second socket on above-mentioned ring pipe, is provided with the second groove on second socket, described
The end of two tube bodies is provided with second boss, and second tube body is inserted into second socket, and the second boss is described in
Second groove enters in the annular chamber and blocks after second tube body rotation, on the inner wall of the end of second tube body
It is provided with second annular groove, second elastic device, second elastic device are built-in in the second annular groove
The other end be fixed on the inner wall of the annular chamber, second elastic device elastic force effect under, second tube body
Compression is stuck on the ring pipe.
Preferably, above-mentioned gas mixer includes the first plate body, the second plate body and N number of blade, wherein first plate body
There is gap between second plate body, the blade is fixed between first plate body and second plate body, described
Blade tilted set is provided with the 6th through-hole on second plate body, and the 6th through-hole is connected to the gap.
Preferably, above-mentioned first tube body includes pipeline section and the first lower tube section on first, and the internal diameter of pipeline section is big on described first
In offering the first through hole on the internal diameter of first lower tube section, the half outer wall of first tube body, outside the other half
Through-hole is not opened up on wall, the top of pipeline section is provided with first connecting plate on described first, and second tube body includes second
Upper pipeline section and the second lower tube section, the internal diameter of pipeline section is greater than the internal diameter of second lower tube section, second down tube on described second
Second through-hole is offered on the half outer wall of section, the holding tank is arranged on described second in pipeline section.
Preferably, above-mentioned first tube body is multiple, first tube body and second tube body is rounded is uniformly arranged on
On the ring pipe.
Preferably, above-mentioned first connecting plate and second connecting plate are the arc being bonded with the inner wall of the exhaust pipe
Plate.
Preferably, above-mentioned fifth hole is two rectangular openings, and the spring leaf is two and is fixed by screws in described
On the outer wall of second tube body.
The present invention also provides a kind of exhaust pipes including tube body and the measurement sensor being arranged on the tube body further includes
Tail gas as described in above-mentioned any one acquires measuring device, first connecting plate and second connecting plate and the tube body
Inner wall connection, the measurement sensor is placed in the holding tank by the fourth hole, the first through hole, described
The direction that second through-hole and the third through-hole come towards air-flow, the direction that the fifth hole is left away towards air-flow.
Preferably, above-mentioned first connecting plate and second connecting plate are welded on the inner wall of the tube body.
Tail gas provided by the invention acquires measuring device, including ring pipe, the first tube body and the second tube body, the ring pipe
In there is annular chamber, there is in first tube body the first cavity, there is the second cavity in second tube body, wherein described
The third through-hole being connected to the annular chamber is offered on the side wall of ring pipe, the annular is inserted into the end of first tube body
In pipe and first cavity is connected to the annular chamber, is set between the end of first tube body and the inner wall of the annular chamber
It is equipped with the first elastic device, under the elastic force effect of first elastic device, first tube body is stuck on the ring pipe,
The top of first tube body is provided with the first connecting plate connecting for the inner wall with exhaust pipe, the side wall of first tube body
On offer the first through hole being connected to first cavity, the end of second tube body is inserted into the ring pipe and described
Second cavity is connected to the annular chamber, is provided with the second bullet between the end of second tube body and the inner wall of the annular chamber
Property device, second elastic device elastic force effect under, second tube body is stuck on the ring pipe, it is described second pipe
The top of body is provided with the second connecting plate connecting for the inner wall with exhaust pipe, opens up on the side wall of second tube body useful
In the second through-hole being connected to second cavity, the top of second tube body is provided with the appearance for accommodating measurement sensor
Receive slot, the holding tank is connected to second cavity, and fourth hole, the fourth hole are offered on second connecting plate
It is connected to the holding tank, gas mixer is provided in the holding tank, it is logical that the 5th is offered on the side wall of the holding tank
Hole is capped with spring leaf on the outside of the fifth hole.
In use, the first connecting plate and the second connecting plate are connect with the inner wall of exhaust pipe tube body, measurement sensor passes through
Fourth hole is placed in holding tank, the direction that first through hole, the second through-hole and third through-hole come towards air-flow, fifth hole
The direction left away towards air-flow.
By taking NOx sensor as an example, to state the test philosophy of tail gas acquisition measuring device provided by the invention.Tail gas from
Enter NOx test section after the outflow of the downstream SCR, after tail gas flows through tail gas acquisition measuring device provided by the invention, most of tail
Gas passes through the subsequent afterflow downstream end of the measuring device, and only fraction tail gas can strike ring pipe, the first tube body and second
Tube body.Ring pipe and the first tube body are hollow structure, and windward side is uniformly machined with multiple apertures, and leeward does not have aperture.The
The windward side of pipeline section does not have aperture on the second of two tube bodies, and the windward side of the second lower tube section is uniformly machined with multiple apertures.Tail
Gas enters out of the second lower tube section of ring pipe, the first tube body and the second tube body windward side aperture, and passes through gas together
Be pooled to pipeline section on the second of the second tube body after mixer, the second tube body second on NOx is installed in holding tank in pipeline section
Sensor, for measuring the NOx concentration after mixing in tail gas.It is logical to be machined with the 5th for the leeward of pipeline section on the second of second tube body
Hole, spring leaf cover but are not completely covered on fifth hole surface, and there are certain distances.Pipeline section on the second of second tube body
Interior tail gas is eventually flowed out from fifth hole, and when exhaust gas flow is larger in exhaust pipe, spring leaf is at a distance from fifth hole
Increase, it is ensured that tail gas can exclude the measuring device in time.When carry the exhaust gas of impurity or steam from tailpipe downstream end to
When the end motion of upstream, spring leaf can be tightly attached to fifth hole surface under thrust gas effect, it is ensured that impurity or steam will not be into
Enter into measuring device, to ensure that the functional reliability of NOx sensor.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram that tail gas provided in an embodiment of the present invention acquires measuring device；
Fig. 2 is the schematic cross-sectional view that tail gas provided in an embodiment of the present invention acquires measuring device；
Fig. 3 is the structural schematic diagram of gas mixer provided in an embodiment of the present invention；
Fig. 4 is the vertical view schematic cross-sectional view of the second tube body provided in an embodiment of the present invention.
In figure 1 above -4:
First tube body 1, first through hole 11, pipeline section 13, first boss 14, the first lower tube section on the first connecting plate 12, first
15, under the first cavity 16, the second tube body 2, the second through-hole 21, the second connecting plate 22, fourth hole 23, second boss 24, second
Pipeline section 25, holding tank 26, fifth hole 27, pipeline section 29, ring pipe 3, third through-hole 31, second are recessed on the second cavity 28, second
Slot 32, the first groove 33, the second elastic device 34, the first elastic device 35, annular chamber 36, gas mixer 4, the first plate body
41, the second plate body 42, blade 43, the 6th through-hole 44, spring leaf 5, screw 51.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1-Fig. 4 is please referred to, Fig. 1 is the structural schematic diagram that tail gas provided in an embodiment of the present invention acquires measuring device；Fig. 2
The schematic cross-sectional view of measuring device is acquired for tail gas provided in an embodiment of the present invention；Fig. 3 is provided in an embodiment of the present invention
The structural schematic diagram of gas mixer；Fig. 4 is the vertical view schematic cross-sectional view of the second tube body provided in an embodiment of the present invention.
Tail gas provided in an embodiment of the present invention acquires measuring device, including ring pipe 3, the first tube body 1 and the second tube body 2,
There is annular chamber 36 in ring pipe 3, there is the first cavity 16 in the first tube body 1, there is the second cavity 28 in the second tube body 2,
In, the third through-hole 31 being connected to annular chamber 36 is offered on the side wall of ring pipe 3, ring pipe 3 is inserted into the end of the first tube body 1
In and the first cavity 16 be connected to annular chamber 36, be provided with the first bullet between the end of the first tube body 1 and the inner wall of annular chamber 36
Property device 35, the first elastic device 35 elastic force effect under, the first tube body 1 is stuck on ring pipe 3, the top of the first tube body 1
It is provided with the first connecting plate 12 connecting for the inner wall with exhaust pipe, is offered and the first cavity on the side wall of the first tube body 1
The first through hole 11 of 16 connections, the end of the second tube body 2 is inserted into ring pipe 3 and the second cavity 28 is connected to annular chamber 36, the
The second elastic device 34 is provided between the end of two tube bodies 2 and the inner wall of annular chamber 36, in the elastic force of the second elastic device 34
Under effect, the second tube body 2 is stuck on ring pipe 3, and the top of the second tube body 2 is provided with connect for the inner wall with exhaust pipe
Two connecting plates 22 offer the second through-hole 21 for being connected to the second cavity 28, the second tube body 2 on the side wall of second tube body 2
Top be provided with the holding tank 26 for accommodating measurement sensor, holding tank 26 is connected to the second cavity 28, the second connecting plate
Fourth hole 23 is offered on 22, fourth hole 23 is connected to holding tank 26, and gas mixer 4 is provided in holding tank 26, is held
Receive slot 26 side wall on offer fifth hole 27, the outside of fifth hole 27 is capped with spring leaf 5.
In use, the first connecting plate 12 and the second connecting plate 22 are connect with the inner wall of exhaust pipe tube body, measurement sensor
It is placed in holding tank 26 by fourth hole 23, first through hole 11, the second through-hole 21 and third through-hole 31 come towards air-flow
Direction, the direction that fifth hole 27 is left away towards air-flow.
By taking NOx sensor as an example, to state the test philosophy of tail gas acquisition measuring device provided in an embodiment of the present invention.Tail
Gas enters NOx test section after flowing out from the downstream SCR, tail gas flows through tail gas acquisition measuring device provided in an embodiment of the present invention
Afterwards, most of tail gas passes through the subsequent afterflow downstream end of the measuring device, and only fraction tail gas can strike ring pipe 3, the
One tube body 1 and the second tube body 2.Ring pipe 3 and the first tube body 1 are hollow structure, and windward side is uniformly machined with multiple apertures, are carried on the back
Wind face does not have aperture.The windward side of pipeline section 29 does not have aperture on the second of second tube body 2, and the windward side of the second lower tube section 25 is equal
It is even to be machined with multiple apertures.The windward side of tail gas from the second lower tube section 25 of ring pipe 3, the first tube body 1 and the second tube body 2 is small
In hole enter, and be pooled to after gas mixer 4 together the second tube body 2 second on pipeline section 29, the second of the second tube body 2
NOx sensor is installed in holding tank 26 in upper pipeline section 29, for measuring the NOx concentration after mixing in tail gas.Second tube body 2
Second on the leeward of pipeline section 29 be machined with fifth hole 27, spring leaf 5 covers but is not completely covered on fifth hole
27 surfaces, there are certain distances.Tail gas on the second of second tube body 2 in pipeline section 29 is eventually flowed out from fifth hole 27, when
When exhaust gas flow is larger in exhaust pipe, spring leaf 5 increases at a distance from fifth hole 27, it is ensured that tail gas can exclude the survey in time
Measure device.When carrying the exhaust gas of impurity or steam from the upstream end motion of tailpipe downstream end, spring leaf 5 is in thrust gas
27 surface of fifth hole can be tightly attached under effect, it is ensured that impurity or steam will not enter in measuring device, to ensure that NOx
The functional reliability of sensor.
In order to advanced optimize above scheme, the first socket is provided on ring pipe 3, it is recessed to be provided with first on the first socket
Slot 33, the end of the first tube body 1 are provided with first boss 14, and the first tube body 1 is inserted into the first socket, and first boss 14 is along first
Groove 33 enters in annular chamber 36 and blocks after the rotation of the first tube body 1,
It is provided with first annular groove on the inner wall of the end of first tube body 1, the first bullet is built-in in first annular groove
Property device 35, the other end of the first elastic device 35 is fixed on the inner wall of annular chamber 36, in the elastic force of the first elastic device 35
Under effect, the first tube body 1 compression is stuck on ring pipe 3.
In order to advanced optimize above scheme, the second socket is provided on ring pipe 3, it is recessed to be provided with second on the second socket
Slot 32, the end of the second tube body 2 are provided with second boss 24, and the second tube body 2 is inserted into the second socket, and second boss 24 is along second
Groove 32 enters in annular chamber 36 and blocks after the rotation of the second tube body 2,
It is provided with second annular groove on the inner wall of the end of second tube body 2, the second bullet is built-in in second annular groove
Property device 34, the other end of the second elastic device 34 is fixed on the inner wall of annular chamber 36, in the elastic force of the second elastic device 34
Under effect, the second tube body 2 compression is stuck on ring pipe 3.
In order to advanced optimize above scheme, gas mixer 4 includes the first plate body 41, the second plate body 42 and N number of blade
43, wherein there is gap, blade 43 is fixed on the first plate body 41 and the second plate body 42 between the first plate body 41 and the second plate body 42
Between, blade 43 is obliquely installed, and the 6th through-hole 44 is provided on the second plate body 42, and the 6th through-hole 44 is connected to gap.
In order to advanced optimize above scheme, the first tube body 1 includes pipeline section 13 and the first lower tube section 15 on first, on first
The internal diameter of pipeline section 13 is greater than the internal diameter of the first lower tube section 15, offers first through hole 11 on the half outer wall of the first tube body 1, another
Through-hole is not opened up on half outer wall, the top of pipeline section 13 is provided with the first connecting plate 12 on first,
Second tube body 2 includes pipeline section 29 and the second lower tube section 25 on second, and the internal diameter of pipeline section 29 is greater than under second on second
The internal diameter of pipeline section 25 offers the second through-hole 22 on the half outer wall of second lower tube section 25, on second outside the opposite side of pipeline section 29
Fifth hole 27 is offered on wall,
Holding tank 26 is arranged on second in pipeline section 29.
In order to advanced optimize above scheme, the first tube body 1 be it is multiple, the first tube body 1 and the second tube body 2 are rounded uniformly
It is arranged on ring pipe 3.Wherein, the first connecting plate 12 and the second connecting plate 22 are the arc being bonded with the inner wall of exhaust pipe
Plate.Fifth hole 27 is two rectangular openings, and spring leaf 5 is two and is fixed on the outer wall of the second tube body 2 by screw 9.
The embodiment of the present invention also provides a kind of exhaust pipe, including tube body and the measurement sensor being arranged on tube body, also wraps
The tail gas acquisition measuring device as described in above-mentioned any one embodiment is included,
First connecting plate 12 and the second connecting plate 22 are connect with the inner wall of tube body, and measurement sensor is put by fourth hole 23
It sets in holding tank 26,
The direction that first through hole 11, the second through-hole 21 and third through-hole 31 come towards air-flow, fifth hole 27 is towards gas
The direction wandered about as a refugee.
Wherein, the first connecting plate 12 and the second connecting plate 22 are welded on the inner wall of tube body.
When specific implementation:
The test philosophy of the measuring device is stated by taking NOx sensor as an example.Tail gas enters after flowing out from the downstream SCR
NOx test section, after tail gas flows through the test device, most of tail gas passes through the subsequent afterflow downstream end of the measuring device, only
Fraction tail gas can strike circle acquisition chamber and T-type acquisition cavity, herein, circle acquisition chamber, that is, annular chamber 36, due to the first pipe
Body 1 includes pipeline section 13 and the first lower tube section 15 on first, and the internal diameter of pipeline section 13 is greater than the internal diameter of the first lower tube section 15 on first, because
This, the first tube body 1 is properly termed as T-type pipe, T-type acquisition cavity i.e. the first cavity 16.Circle acquisition chamber and T-type acquisition cavity are hollow knot
Structure, windward side are uniformly machined with multiple apertures, i.e. third through-hole 31 and the second through-hole 21, and leeward does not have aperture.Second pipe
Body 2 is referred to as acquisition measurement pipe, and acquisition measurement chamber i.e. the second cavity 28 of the second tube body 2, the second tube body 2 includes on second
Pipeline section 29 and the second lower tube section 25, the internal diameter of pipeline section 29 is greater than the internal diameter of the second lower tube section 25 on second, and pipeline section 29 is on second
The head of acquisition measurement chamber, second lower tube section 25 be the tail portion of acquisition measurement chamber, and acquisition measures pipeline section 29 on the second of chamber and meets
Wind face does not have aperture, and the windward side of the second lower tube section 25 is uniformly machined with multiple apertures, i.e. the second through-hole 21.Tail gas is from annular
Enter in the windward side aperture of second lower tube section 25 of acquisition cavity, T-type acquisition cavity and acquisition measurement chamber, i.e., from third through-hole
31, first through hole 11, the second through-hole 21 enter, and subsequent tail gas measures the second lower tube section of chamber 25 along acquisition, gas mixer 4
Upper surface closing is acted on by each blade 43 when tail gas stream is flowed out from 4 surrounding of gas mixer and generates rotation, and it is mixed to play acceleration
The effect of conjunction.Tail gas is pooled to pipeline section 29 on the second of acquisition measurement chamber, installs in pipeline section 29 on the second of acquisition measurement chamber
There is NOx sensor, for measuring the NOx concentration after mixing in tail gas.The leeward of pipeline section 29 adds on the second of acquisition measurement chamber
There are two rectangular opening, i.e. fifth hole 27, spring leafs 5 not to be completely covered on rectangle discharge surface for work, and there are certain distances.Acquisition
The tail gas on the second of chamber in pipeline section 29 is measured eventually from the rectangular opening outflow of pipeline section 29 on the second of acquisition measurement chamber.Work as row
When intratracheally exhaust gas flow is larger, spring leaf 5 increases at a distance from rectangular outlet, it is ensured that tail gas can exclude measurement dress in time
It sets.When carrying the exhaust gas of impurity or steam from the upstream end motion of tailpipe downstream end, spring leaf 5 is acted in thrust gas
Under can be tightly attached to rectangular outlet surface, it is ensured that impurity or steam will not enter in measuring device, to ensure that NOx sensor
Functional reliability.
Wherein, the first elastic device 35 and the second elastic device 34 are preloading spring, and preloading spring, which is fixed on annular, to be adopted
Collect on chamber, the second lower tube section 25 of T-type acquisition cavity and acquisition measurement chamber is machined with an annular groove, i.e., first annular groove and
Second annular groove, preloading spring can in groove free extension.T-type acquisition cavity and acquisition measurement chamber all have anticreep convex
Platform feature, i.e. first boss 14 and second boss 24.It is machined with access recess feature at each connector of circle acquisition chamber, i.e.,
First groove 33 and the second groove 32, T-type acquisition cavity be inserted into a manner of clearance fit circle acquisition it is intracavitary before, need
The anticreep boss feature of T-type acquisition cavity is adjusted, to be directed at the access recess feature of annular acquisition cavity.When T-type acquisition cavity is inserted into
After circle acquisition is intracavitary, T-type acquisition cavity is rotated by a certain angle, at this point, T-type acquisition cavity can not take from circle acquisition is intracavitary
Out.So far, the connection of T-type acquisition cavity and circle acquisition chamber is completed.The connection type phase of acquisition measurement chamber and circle acquisition chamber
Together.T-type acquisition cavity and acquisition measurement chamber can realize a certain range of movement, T-type acquisition cavity in the radial direction of circle acquisition chamber
First on pipeline section 13 and T-type acquisition cavity connecting plate, i.e. the first connecting plate 12 fixed with welding manner, the second of acquisition measurement chamber
Upper pipeline section 29 is fixed with acquisition measurement chamber connecting plate, i.e. the second connecting plate 22 with welding manner, and gas mixer 4 is with welding manner
It is fixed on pipeline section 29 on the second of acquisition measurement chamber, spring leaf 5 is fixed on pipeline section on the second of acquisition measurement chamber by screw 51
29 leeward, so far, measuring device assembling finish.When the measuring device is installed on exhaust pipe, acquisition is surveyed first
It measures pipeline section 29 on the second of chamber and is directed at NOx sensor mounting base, it is ensured that NOx sensor is placed to the second upper tube of acquisition measurement chamber
At the suitable position of section 29, do not interference with gas mixer 4.Acquisition measurement chamber connecting plate is fixed and arranged using welding manner
Inner surface of trachea is connected, and then, continues that T-type acquisition cavity connecting plate is fixed on exhaust inside pipe wall using welding manner, so far, complete
The installation of the measuring device positions.
T-type acquisition cavity may result in tail gas in the radial movement of circle acquisition chamber and overflow from there, herein and should not
It asks and is fully sealed, but it is intracavitary to be necessary to ensure that the most tail gas entered from collection point can enter acquisition measurement.Therefore,
The part that T-type acquisition cavity is connected with circle acquisition chamber needs to be machined out, and guarantees under gap fiting mode, air leakage exists
In zone of reasonableness.
Tail gas provided in an embodiment of the present invention acquires measuring device, and major advantage is as follows:
1, T-type acquisition cavity and acquisition measurement chamber all have anticreep boss feature, each connector with circle acquisition chamber
The access recess mate features at place close, it is ensured that T-type acquisition cavity and acquisition measurement chamber after combination can not be from circle acquisition chambers
Inside fall off；
2, preloading spring is installed between T-type acquisition cavity and circle acquisition chamber, under the vibration influence that vehicle operation generates,
The present apparatus can ensure not fall off from gas exhaust piping, have good functional reliability.Meanwhile caliber is adapted to certain
The exhaust pipe changed in range, has expanded the matching versatility of the measuring device；
3, devise circle acquisition chamber, and be distributed to the acquisition cavity of each point, increase collection point distribution, reduce due to
Measurement error caused by exhaust gas composition is unevenly distributed in tail gas stream；
4, using chip architecture of the spring, the gas after can not only ensuring to acquire can smoothly be flowed out out of measurement cavity, and
And avoid the damage of impurity or steam to sensor.Meanwhile reducing the flow resistance of measuring device；
5, acquisition measurement is intracavitary devises gas mixer, improves the uniformity of measurement intracavity gas ingredient, improves and pass
Sensor is popped one's head in out the stability of gas；
In tail gas acquisition measuring device provided in an embodiment of the present invention:
1, using preloading spring device, facilitate installation, be adapted to a certain range of exhaust caliber change, expanded the survey
Measure the matching versatility of device；
2, the dress at each connector of the anticreep boss feature and circle acquisition chamber of T-type acquisition cavity and acquisition measurement chamber
Notch feature is unloaded to match；
3, collection point distribution is more uniform, reduces tail gas sensor measurement deviation, improves measurement accuracy；
4, using chip architecture of the spring, the flow resistance of measuring device is reduced, reduces tail gas back pressure, is conducive to engine performance,
The damage of impurity or steam to sensor is avoided simultaneously；
5, intracavitary to devise Scroll-type gas mixer, reduce the numerical fluctuations of sensor measurement, improves measurement essence
Degree and stability.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of tail gas acquires measuring device, which is characterized in that including ring pipe, the first tube body and the second tube body, the annular
There is annular chamber in pipe, there is the first cavity in first tube body, there is the second cavity in second tube body, wherein
The third through-hole being connected to the annular chamber is offered on the side wall of the ring pipe,
The end of first tube body is inserted into the ring pipe and first cavity is connected to the annular chamber, and described first
It is provided with the first elastic device between the end of tube body and the inner wall of the annular chamber, makees in the elastic force of first elastic device
Under, first tube body is stuck on the ring pipe, and the top of first tube body is provided with for the inner wall with exhaust pipe
First connecting plate of connection offers the first through hole being connected to first cavity on the side wall of first tube body,
The end of second tube body is inserted into the ring pipe and second cavity is connected to the annular chamber, and described second
It is provided with the second elastic device between the end of tube body and the inner wall of the annular chamber, makees in the elastic force of second elastic device
Under, second tube body is stuck on the ring pipe, and the top of second tube body is provided with for the inner wall with exhaust pipe
Second connecting plate of connection offers the second through-hole for being connected to second cavity on the side wall of second tube body,
The top of second tube body is provided with the holding tank for accommodating measurement sensor, the holding tank and second chamber
Body is connected to, and offers fourth hole on second connecting plate, the fourth hole is connected to the holding tank, the holding tank
In be provided with gas mixer,
Fifth hole is offered on the side wall of the holding tank, is capped with spring leaf on the outside of the fifth hole,
First tube body includes pipeline section and the first lower tube section on first, and the internal diameter of pipeline section is greater than under described first on described first
The internal diameter of pipeline section offers the first through hole on the half outer wall of first tube body, does not open up on the other half outer wall logical
Hole, the top of pipeline section is provided with first connecting plate on described first,
Second tube body includes pipeline section and the second lower tube section on second, and the internal diameter of pipeline section is greater than under described second on described second
The internal diameter of pipeline section offers second through-hole on the half outer wall of second lower tube section,
The holding tank is arranged on described second in pipeline section,
The direction that the first through hole, second through-hole and the third through-hole come towards air-flow, the fifth hole court
The direction left away to air-flow.
2. tail gas according to claim 1 acquires measuring device, which is characterized in that be provided with first on the ring pipe and insert
Mouthful, it is provided with the first groove on first socket, the end of first tube body is provided with first boss, first tube body
It is inserted into first socket, the first boss enters in the annular chamber and in first tube body along first groove
It is blocked after rotation,
It is provided with first annular groove on the inner wall of the end of first tube body, is built-in in the first annular groove described
The other end of first elastic device, first elastic device is fixed on the inner wall of the annular chamber, in first elasticity
Under the elastic force effect of device, the first tube body compression is stuck on the ring pipe.
3. tail gas according to claim 1 acquires measuring device, which is characterized in that be provided with second on the ring pipe and insert
Mouthful, it is provided with the second groove on second socket, the end of second tube body is provided with second boss, second tube body
It is inserted into second socket, the second boss enters in the annular chamber and in second tube body along second groove
It is blocked after rotation,
It is provided with second annular groove on the inner wall of the end of second tube body, is built-in in the second annular groove described
The other end of second elastic device, second elastic device is fixed on the inner wall of the annular chamber, in second elasticity
Under the elastic force effect of device, the second tube body compression is stuck on the ring pipe.
4. tail gas according to claim 1 acquires measuring device, which is characterized in that the gas mixer includes the first plate
Body, the second plate body and N number of blade, wherein there is gap, the blade is fixed between first plate body and second plate body
Between first plate body and second plate body, the blade tilted set,
The 6th through-hole is provided on second plate body, the 6th through-hole is connected to the gap.
5. tail gas according to claim 1 acquires measuring device, which is characterized in that first tube body be it is multiple, it is described
First tube body and second tube body is rounded is uniformly arranged on the ring pipe.
6. tail gas according to claim 1 acquires measuring device, which is characterized in that first connecting plate and described second
Connecting plate is the arc panel being bonded with the inner wall of the exhaust pipe.
7. tail gas according to claim 1 acquires measuring device, which is characterized in that the fifth hole is two rectangles
Hole,
The spring leaf is two and is fixed by screws on the outer wall of second tube body.
8. a kind of exhaust pipe, including tube body and the measurement sensor being arranged on the tube body, which is characterized in that further include as above
The acquisition measuring device of tail gas described in claim 1-7 any one is stated,
First connecting plate and second connecting plate are connect with the inner wall of the tube body, and the measurement sensor passes through described
Fourth hole is placed in the holding tank,
The direction that the first through hole, second through-hole and the third through-hole come towards air-flow, the fifth hole court
The direction left away to air-flow.
9. exhaust pipe according to claim 8, which is characterized in that first connecting plate and second connecting plate welding
On the inner wall of the tube body.
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| CN201910259366.3A CN109738598B (en) | 2019-04-02 | 2019-04-02 | A kind of exhaust pipe and its tail gas acquire measuring device |
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| CN201910259366.3A CN109738598B (en) | 2019-04-02 | 2019-04-02 | A kind of exhaust pipe and its tail gas acquire measuring device |
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| CN109738598B true CN109738598B (en) | 2019-06-28 |
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| US10907520B1 (en) | 2019-10-22 | 2021-02-02 | Faurecia Emissions Control Technologies, Usa, Llc | Sampling device for an exhaust gas sensor |
| US11203966B1 (en) | 2020-09-30 | 2021-12-21 | Faurecia Emissions Control Technologies, Usa, Llc | Circular sampling device for an exhaust gas sensor |
| CN113669144A (en) * | 2021-09-29 | 2021-11-19 | 无锡威孚力达催化净化器有限责任公司 | Nitrogen oxide concentration measuring device for tail gas aftertreatment |
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| CN105723200A (en) * | 2013-10-18 | 2016-06-29 | 斯奈克玛 | Method and device for measuring pollutants contained in engine exhaust |
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