CN108444721A - Multi-channel gas switching device - Google Patents
Multi-channel gas switching device Download PDFInfo
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- CN108444721A CN108444721A CN201810183084.5A CN201810183084A CN108444721A CN 108444721 A CN108444721 A CN 108444721A CN 201810183084 A CN201810183084 A CN 201810183084A CN 108444721 A CN108444721 A CN 108444721A
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- valve
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- connecting hole
- switching device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- General Physics & Mathematics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of multi-channel gas switching devices, are applied to the measurement of gas componant before and after catalyst converter, and multi-channel gas switching device includes valve seat, multiple valve bodies and control switch.Valve seat includes the lower part that multiple sampling channels are located at valve seat；And interface channel is located at the top of valve seat, one end of interface channel is communicated with multiple sampling channels, and the other end connects gas analyzer.Multiple valve bodies are installed in the lower part of valve seat, and each valve body corresponds to a sampling channel.And control switch is electrically connected multiple valve bodies.The multi-channel gas switching device of the present invention only needs to arrange multi-channel sampling probe before the test, and switching device switch is connected to test operation platform, is powered, powers off the function of can reach switching multipath gas sampling.And valve body is separable with valve seat, safeguards more convenient and quicker.
Description
Technical field
The present invention relates to engine emission technical field of measurement and test, more particularly to a kind of gas componant before and after being applied to catalyst converter
The multi-channel gas switching device of measurement.
Background technology
In six development process of traditional fuel engine state, need to test the gas in exhaust after treatment system before and after catalyst converter
Body ingredient carries out catalyst converter characteristic evaluation.An existing gas analyzer only has single channel to measure function, can only survey every time
Measure gas all the way.In six exhaust after treatment system development process of existing state, common practice is as follows：
1. arranging two gas analyzers in a rack, while measuring gas componant before and after catalyst converter；
2. only using a gas analyzer, first measure gas componant all the way, then dismantle sampling pipe to another way gas into
Row measures；
3. only using a gas analyzer and a double-channel gas switching device carrying out the front and back measurement gas of catalyst converter
Ingredient needs dismounting to carry out next catalyst converter measurement after the completion of measuring one.
The problem of existing scheme encounters：
1) a shortcomings that rack arranges two gas analyzers：
1. needing two gas analyzers, increase experimentation cost.
2. two gas analyzers occupy larger test space, the work of operative employee is not utilized.
2) when replacing different location measuring point, engine stop is needed to operate, it is artificial to dismount gas sampling probe and sampling pipe,
Influence test efficiency；
3) it is remeasured again after engine booting, there are measurement results and the risk to differ greatly before, influence data standard
True property；
4) it has measured (such as DOC) after a catalyst converter, then has carried out the assessment of another catalyst converter (such as DPF), needed to adjust
It is whole to be measured to identical operating mode, it can not ensure the consistency of operating mode, be unable to accurate evaluation catalyst converter characteristic；
5) sampling probe and sampling pipe are dismounted in the case of a high temperature, and there are the risks of high temperature scald, be easy to cause industrial injury etc.
Safety problem；
6) double-channel gas switching device switching switch can not effectively determine that the priority of Measurement channel is suitable without error-disable function
Sequence；
7. double-channel gas switching device valve body and valve seat one, need replacing whole device after valve body damage, safeguard
Difficulty is big, of high cost.
It solves the above problems, at text field urgent problem to be solved.
Being disclosed in the information of the background technology part, it is only intended to increase understanding of the overall background of the invention, without answering
It has been the prior art well known to persons skilled in the art when being considered as recognizing or imply that the information is constituted in any form.
Invention content
The purpose of the present invention is to provide a kind of multi-channel gas switching devices, and needs are safeguarded in the prior art to overcome
Replace big, the of high cost disadvantage of the difficulty of whole device.
To achieve the above object, the present invention provides a kind of multi-channel gas switching devices, are applied to before and after catalyst converter
The measurement of gas componant, multi-channel gas switching device include valve seat, multiple valve bodies and control switch.Valve seat includes multiple takes
Sample channel is located at the lower part of valve seat；And interface channel is located at the top of valve seat, one end of interface channel and multiple sampling channels phase
Logical, the other end connects gas analyzer.Multiple valve bodies are installed in the lower part of valve seat, and each valve body corresponds to a sampling channel.With
And control switch is electrically connected multiple valve bodies.
Preferably, in above-mentioned technical proposal, each valve body includes upper valve body, lower valve body and valve rod.Upper valve body includes：On
Valve opening is located at one end of upper valve body；Coil encircling is outside upper valve body；Spring is installed in the inside of valve opening；And power-on switch electricity
Property connection coil.Lower valve body is connect with upper valve body, and lower valve body includes one end that lower valve opening is set to lower valve body；Upper connecting hole setting
In the top of lower valve body, one end of upper connecting hole is communicated with lower valve opening, and multiple samplings of the other end and valve seat of upper connecting hole are logical
One of road connects；And lower connecting hole is set to the lower part of lower valve body, one end of lower connecting hole is communicated with lower valve opening, lower company
Connect the other end connection catalyst converter in hole；And valve rod is installed in valve opening and lower valve opening.
Preferably, in above-mentioned technical proposal, tension force of spring makes the other end of valve rod support the inner end of lower valve opening, and blockades
Upper connecting hole and lower connecting hole are communicated with lower valve opening.
Preferably, in above-mentioned technical proposal, when power-on switch is opened, coil, which is powered, generates electromagnetic field, and electromagnetic field makes valve rod
Overcome tension force of spring far from the inner end of lower valve opening, while connecting hole and lower connecting hole being made to be communicated with lower valve opening.
Preferably, in above-mentioned technical proposal, control switch is variable connector, and the logical of each valve body is electrically connected per way switch
Electric switch, and the power-on switch for controlling each valve body is turned on and off.
Compared with prior art, multi-channel gas switching device of the invention only needs to arrange multi-channel sampling before the test
Probe, switching device switch are connected to test operation platform, are powered, power-off is that can reach the function of switching multipath gas sampling, dimension
Protect more convenient and quicker.
Description of the drawings
Fig. 1 is the schematic three dimensional views of gas switching device according to the present invention.
Fig. 2 is the application schematic diagram of gas switching device according to the present invention.
Fig. 3 is the schematic side view of the valve seat of gas switching device according to the present invention.
Fig. 4 is the directions the F-F schematic cross-sectional view of the valve seat of gas switching device according to the present invention.
Fig. 5 is the schematic side view of the valve body of gas switching device according to the present invention.
Fig. 6 is the directions the G-G schematic cross-sectional view of the valve body of gas switching device according to the present invention.
Main appended drawing reference explanation：
1- valve seats, 11- first sample channel, and 12- second samples channel, and 13- thirds sample channel, and the samplings of 14- the 4th are logical
Road, the samplings of 15- the 5th channel, 16- interface channels, 2- valve bodies, 21- upper valve bodies, the upper valve openings of 211-, 212- coils, 213- springs,
214- power-on switch, 22- lower valve bodies, valve opening under 221-, the upper connecting holes of 222-, connecting hole under 223-, 23- valve rods, 3- controls are opened
It closes, 100- multi-channel gas switching devices, 200- gas analyzers, 300- catalyst converters.
Specific implementation mode
Below in conjunction with the accompanying drawings, the specific implementation mode of the present invention is described in detail, it is to be understood that the guarantor of the present invention
Shield range is not restricted by specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " comprising " or its change
It changes such as "comprising" or " including " etc. and will be understood to comprise stated element or component, and do not exclude other members
Part or other component parts.
As shown in Figures 1 to 6, it according to a kind of multi-channel gas switching device 100 of the specific embodiment of the invention, answers
For the measurement of gas componant before and after catalyst converter, multi-channel gas switching device 100 includes valve seat 1, multiple valve bodies 2 and control
Switch 3.Valve seat 1 includes the lower part that multiple sampling channels 12,12,13,14,15 are located at valve seat 1；And interface channel 16 is located at valve seat
1 top, one end of interface channel 16 are communicated with multiple sampling channels 12,12,13,14,15, and the other end connects gas analyzer
200.Multiple valve bodies 2 are installed in the lower part of valve seat 1, and each valve body 2 corresponds to a sampling channel 12,12,13,14,15.And control
It makes switch 3 and is electrically connected multiple valve bodies 2.
Fig. 3 to Fig. 6 is please referred to, in some embodiments, each valve body 2 includes upper valve body 21, lower valve body 22 and valve
Bar 23.The shape approximation of upper valve body 21 is cylindric, and one end of upper valve body 21 has upper valve opening 211；In 21 outside winding of upper valve body
Coil 212；The inside of upper valve opening 211 is installed with spring 213；Coil 212 is also electrically connected with power-on switch 214 simultaneously.Under
Valve body 22 is connected with upper valve body 21, and one end of lower valve body 22 has lower valve opening 221；The top of lower valve body 22 has upper connecting hole
222, one end of upper connecting hole 222 is communicated with lower valve opening 221, the other end of upper connecting hole 222 and multiple sampling channels of valve seat 1
12,12,13,14, one of 15 connection；The lower part of lower valve body 22 has lower connecting hole 223, one end of lower connecting hole 223
It is communicated with lower valve opening 221, the other end of lower connecting hole 223 connects catalyst converter 300 to be tested.
Fig. 3 please be refer to, in some embodiments, upper valve body 21 is that the above valve opening 211 is aligned lower valve opening with lower valve body 22
What 221 mode linked together, upper valve opening 211 forms accommodating cavity after being aligned with lower valve opening 221, it is accommodating that valve rod 23 is installed in this
Intracavitary, 23 one end of valve rod rest against spring 213 and are inserted in valve opening 211, and the other end is inserted in lower valve opening 221.Spring 213
Tension so that the other end of valve rod 23 is supported the inner end of lower valve opening 221, and blockade connecting hole 222 and lower connecting hole 223 under
Valve opening 221 communicates.When power-on switch 214 is opened, coil 212, which is powered, generates electromagnetic field, and electromagnetic field makes valve rod 23 overcome spring 213
Inner end of the tension far from lower valve opening 221, while connecting hole 222 and lower connecting hole 223 being made to be communicated with lower valve opening 221.
Fig. 1 please be refer to, in some embodiments, control switch 3 is variable connector, and each valve is electrically connected per way switch
The power-on switch 214 of body 2, and the power-on switch 214 for controlling each valve body 2 is turned on and off.The control that the present embodiment is painted
Switch 3 is five tunnels, and valve body 2 is also to depict five, but the present invention is not as example.
The concrete operating principle of the multi-channel gas switching device 100 of the present invention is as follows：
The valve seat 1 of the present embodiment has 5 sampling channels 11,12,13,14,15, can install 5 valve bodies 2 (in Fig. 1 only
Depict 3 valve bodies 2), control switch 3 is also the switch that can control 5 lands.It please refers to Fig.1 to Fig. 2.
First, 5 valve bodies 2 are installed on 5 corresponding sampling channels 11,12,13,14,15 of valve seat 1；It again will control
5 road control lines of system switch 3 are connected respectively on the power-on switch 214 of 5 valve bodies 2；Then by the lower connecting hole of each valve body 2
223 with being connected to all the way in the gas detection pipeline A B C D E of catalyst converter 300 to be detected；Finally the connection of valve seat 1 is led to
Road 16 is connected to gas analyzer 200.
Subsequent start-up is to be detected to start, and waits for reaching testing requirements concentration by the gas in catalyst converter 300 to be detected
When, the first via button of control switch 3 is first pressed, it is logical with the power-on switch 214 of that valve body 2 of first via button connects at this time
Electricity makes the upper connecting hole 222 of this valve body 2 and lower connecting hole 223 are connected to simultaneously with lower valve opening 221, is tested gas from first via pipe
Road A enters lower connecting hole 223, by the lower connecting hole 223 of the valve body 2, lower valve opening 221, upper connecting hole 222, using valve seat 1
First sampling channel 11 and interface channel 16 after enter gas analyzer 200 carry out gas analysis；After the completion of waiting for gas analysis,
The first via button of control switch 3 is lifted, cut-out connects the power supply of the power-on switch 214 of the road valve body 2, is this road sense channel
It closes, completes the detection of the road catalyst converter 300.
Hereafter, press again lift control switch 3 second and third, four, No. five buttons, equally complete above-mentioned detection
Process.
In conclusion the multi-channel gas switching device of the present invention has the advantages that compared with prior art：
1, the switching device is practical reliable, can smoothly be tested under the premise of engine does not shut down, do not dismount sampling pipe more
The gas componant on road, test efficiency improve 80% or more；
2, trystate disunity problem after frequent shutdown, booting is avoided, it is ensured that data accuracy, consistency；
3, using intelligent control switch, the one-to-one correspondence of Measurement channel is realized, channel confusion problem is avoided, improves
Working efficiency；
4, it is that can reach the realization of free switching function that only need to increase power switch in test bench, easy to operate, just
Victory avoids the risk that operator be easy to cause industrial injury；
5, valve body and valve seat are separable, safeguard more convenient and quicker.
The description of the aforementioned specific exemplary embodiment to the present invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the present invention and its actually answering
With so that those skilled in the art can realize and utilize the present invention a variety of different exemplary implementation schemes and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (5)
1. a kind of multi-channel gas switching device is applied to the measurement of gas componant before and after catalyst converter, which is characterized in that described
Multi-channel gas switching device includes：
Valve seat comprising：
Multiple sampling channels are located at the lower part of the valve seat；And
Interface channel is located at the top of the valve seat, and one end of the interface channel is communicated with the multiple sampling channel, separately
One end connects gas analyzer；
Multiple valve bodies are installed in the lower part of the valve seat, and each valve body corresponds to a sampling channel；And
Control switch, is electrically connected the multiple valve body.
2. multi-channel gas switching device according to claim 1, which is characterized in that each the valve body includes：
Upper valve body comprising：
Upper valve opening is located at one end of the upper valve body；
Coil is looped around outside the upper valve body；
Spring is installed in the inside of the upper valve opening；And
Power-on switch is electrically connected the coil；
Lower valve body is connect with the upper valve body, and the lower valve body includes：
Lower valve opening, is set to one end of the lower valve body；
Upper connecting hole is set to the top of the lower valve body, and one end of the upper connecting hole is communicated with the lower valve opening, described
One of the other end of upper connecting hole and the multiple sampling channel of the valve seat are connect；And
Lower connecting hole is set to the lower part of the lower valve body, and one end of the lower connecting hole is communicated with the lower valve opening, described
The other end of lower connecting hole connects the catalyst converter；And
Valve rod is installed in the upper valve opening and the lower valve opening.
3. multi-channel gas switching device according to claim 2, which is characterized in that the tension force of spring makes the valve
The other end of bar supports the inner end of the lower valve opening, and blockades the upper connecting hole and the lower connecting hole and the lower valve opening phase
It is logical.
4. multi-channel gas switching device according to claim 2, which is characterized in that when power-on switch opening, institute
It states coil energization and generates electromagnetic field, the electromagnetic field makes the valve rod overcome the tension force of spring far from the lower valve opening
End, while the upper connecting hole and the lower connecting hole being made to be communicated with the lower valve opening.
5. multi-channel gas switching device according to claim 2, which is characterized in that the control switch is opened for multichannel
It closes, the power-on switch for being electrically connected each valve body is switched described in every road, and control each the described of the valve body and lead to
Electric switch is turned on and off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183084.5A CN108444721A (en) | 2018-03-06 | 2018-03-06 | Multi-channel gas switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183084.5A CN108444721A (en) | 2018-03-06 | 2018-03-06 | Multi-channel gas switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108444721A true CN108444721A (en) | 2018-08-24 |
Family
ID=63193791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810183084.5A Pending CN108444721A (en) | 2018-03-06 | 2018-03-06 | Multi-channel gas switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108444721A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991011A (en) * | 2019-05-06 | 2019-07-09 | 广西玉柴机器股份有限公司 | Part diluted stream sampling system sampling channel switching system |
| CN112431695A (en) * | 2020-12-15 | 2021-03-02 | 广西玉柴机器股份有限公司 | Measuring system for EGR rate of gas engine cylinder |
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| CN102494897A (en) * | 2011-10-28 | 2012-06-13 | 奇瑞汽车股份有限公司 | Exhaust gas sampling switching device and control method for same |
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| CN204420137U (en) * | 2015-02-09 | 2015-06-24 | 张少华 | Solenoid valve |
| CN207798415U (en) * | 2018-03-06 | 2018-08-31 | 广西玉柴机器股份有限公司 | Multi-channel gas switching device |
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2018
- 2018-03-06 CN CN201810183084.5A patent/CN108444721A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201034867Y (en) * | 2007-03-30 | 2008-03-12 | 长沙开元仪器有限公司 | Gasometry sampling automatic gear |
| CN102494897A (en) * | 2011-10-28 | 2012-06-13 | 奇瑞汽车股份有限公司 | Exhaust gas sampling switching device and control method for same |
| CN102662034A (en) * | 2012-05-28 | 2012-09-12 | 中国科学院地理科学与资源研究所 | Multichannel double-circulation soil carbon discharge delta13C observing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109991011A (en) * | 2019-05-06 | 2019-07-09 | 广西玉柴机器股份有限公司 | Part diluted stream sampling system sampling channel switching system |
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| CN112431695A (en) * | 2020-12-15 | 2021-03-02 | 广西玉柴机器股份有限公司 | Measuring system for EGR rate of gas engine cylinder |
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