CN109613187A - A kind of gas controlling device - Google Patents
A kind of gas controlling device Download PDFInfo
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- CN109613187A CN109613187A CN201910133884.0A CN201910133884A CN109613187A CN 109613187 A CN109613187 A CN 109613187A CN 201910133884 A CN201910133884 A CN 201910133884A CN 109613187 A CN109613187 A CN 109613187A
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- 239000000523 sample Substances 0.000 claims abstract description 145
- 238000009434 installation Methods 0.000 claims description 26
- 238000005070 sampling Methods 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 19
- 238000009530 blood pressure measurement Methods 0.000 claims description 17
- 238000009529 body temperature measurement Methods 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 238000010926 purge Methods 0.000 claims description 6
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 14
- 238000012544 monitoring process Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
- G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure or temperature
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Abstract
The invention discloses a kind of gas controlling devices, comprising: high pressure draught probe tube, low-pressure air current probe tube, differential pressure pick-up, high-voltage end reset solenoid valve, low-pressure end resets solenoid valve and controller；It includes first passage and second channel that high-voltage end, which resets solenoid valve,；It includes third channel and fourth lane that low-pressure end, which resets solenoid valve,；Controller control high-voltage end resets solenoid valve and switches to first passage, so that the high pressure draught of high pressure draught probe tube is delivered to differential pressure pick-up by first passage；Control low-pressure end resets solenoid valve and switches to third channel, so that the low-pressure air current of low-pressure air current probe tube passes through third channel to differential pressure pick-up；Control high-voltage end resets solenoid valve and switches to second channel, and control low-pressure end resets solenoid valve and switches to fourth lane, so that differential pressure pick-up is reset.The present invention provides a kind of gas controlling devices, to solve the problems, such as that gas-detecting device measuring accuracy is low.
Description
Technical field
The present invention relates to environment monitoring technical field more particularly to a kind of gas controlling devices.
Background technique
It is all dirty with different degrees of environment in the world with the raising of scientific skill level and living standards of the people
Dye, concentration and total emission volumn to volatile organic matter, gaseous pollutant and gaseous state particulate matter continuously monitor particularly important.
In the prior art, VOCS (volatile organic compounds concentration and total emission volumn continuous monitor system) or CEMS
In (gaseous pollutant and particulate matter carry out concentration and total emission volumn continuous monitor system), it is provided with gas controlling device, is used
It is acquired in the specific data of temperature, differential pressure and pressure to gas, to obtain gas concentration of emission, gas is discharged
Concentration is monitored.
But at present in industry during gas controlling device measurement pressure difference, differential pressure pickup is easy to occur because of environmental factor
Drift, measuring accuracy is lower, while resetting calibration function without sensor, it is difficult to meet more and more accurate environment monitoring and want
It asks.
Summary of the invention
The embodiment of the invention provides a kind of gas controlling devices, and to solve, gas controlling device measuring accuracy is low to be asked
Topic.
The embodiment of the invention provides a kind of gas controlling devices, comprising:
High pressure draught probe tube, low-pressure air current probe tube, differential pressure pick-up, high-voltage end reset solenoid valve, low-pressure end is reset
Solenoid valve and controller；
The first end that the high-voltage end resets solenoid valve is connected to the outlet end of the high pressure draught probe tube, second end and
The high-voltage end of the differential pressure pick-up is connected to, and third end is connected to the 6th end that the low-pressure end resets solenoid valve；The high pressure
First passage is formed between the first end and second end of end clearing solenoid valve, forms second channel between second end and third end；
The 4th end that the low-pressure end resets solenoid valve is connected to the outlet end of the low-pressure air current probe tube, the 5th end and
The low-pressure end of the differential pressure pick-up is connected to；It is logical that the low-pressure end resets formation third between the 4th end and the 5th end of solenoid valve
Road forms fourth lane between the 5th end and the 6th end；
The high-voltage end of the differential pressure pick-up resets the 6th end of solenoid valve by the second channel and the low-pressure end
Connection, the low-pressure end reset the fourth lane of solenoid valve and the third of high-voltage end clearing solenoid valve by the low-pressure end
End connection；
The controller resets solenoid valve with the high-voltage end respectively and the low-pressure end resets solenoid valve and is electrically connected,
The controller is used for: being controlled the high-voltage end clearing solenoid valve and is switched to first passage, so that the high pressure gas
The high pressure draught of stream probe tube acquisition is delivered to the high-voltage end of the differential pressure pick-up by the first passage；It controls described low
Pressure side resets solenoid valve and switches to third channel, so that the low-pressure air current of low-pressure air current probe tube acquisition passes through the third
Channel to the differential pressure pick-up low-pressure end；It controls the high-voltage end clearing solenoid valve and switches to second channel, and control institute
It states low-pressure end clearing solenoid valve and switches to fourth lane, so that the differential pressure pick-up is reset.
Optionally, the gas controlling device further include: blowback air inlet pipe；The blowback air inlet pipe respectively with the high pressure
The outlet end of air-flow probe tube is connected to the outlet end of the low-pressure air current probe tube, for purge gas to be delivered to the height
Pressure gas stream probe tube and low-pressure air current probe tube.
Optionally, the gas controlling device further include: high-voltage end blowback solenoid valve and low-pressure end blowback solenoid valve；It is described
7th end of high-voltage end blowback solenoid valve is connected to the outlet end of the high pressure draught probe tube, and the 8th end and the high-voltage end are clear
The first end of zero solenoid valve is connected to, and the 9th end is connected to the blowback air inlet pipe；7th end of the high-voltage end blowback solenoid valve
And the 8th form Five-channel between end, and the 6th channel is formed between the 7th end and the 9th end；The controller and the high pressure
The electrical connection of blowback solenoid valve is held, Five-channel is switched to for controlling the high-voltage end blowback solenoid valve, so that the high pressure gas
Stream probe tube is connected to by the Five-channel with the first end that the high-voltage end resets solenoid valve；The controller is also used to control
Make the high-voltage end blowback solenoid valve and switch to the 6th channel so that the blowback air inlet pipe by the 6th channel with it is described
The outlet end of high pressure draught probe tube is connected to；Tenth end of the low-pressure end blowback solenoid valve and the low-pressure air current probe tube
Outlet end connection, the tenth one end are connected to the 4th end that the low-pressure end resets solenoid valve, the 12nd end and the blowback air inlet
Pipe connection；The 7th channel, the tenth end and the 12nd are formed between the tenth end and the tenth one end of the high-voltage end blowback solenoid valve
The 8th channel is formed between end；The controller is electrically connected with the low-pressure end blowback solenoid valve, for controlling the low-pressure end
Blowback solenoid valve switches to the 7th channel, so that the low-pressure air current probe tube is clear by the 7th channel and the low-pressure end
4th end of zero solenoid valve is connected to；The controller is also used to control the low-pressure end blowback solenoid valve and switches to the 8th channel,
So that the blowback air inlet pipe passes through the 8th channel of the low-pressure end blowback solenoid valve and going out for the low-pressure air current probe tube
The connection of mouth end.
Optionally, the controller includes: detection device, control chip and trigger device；The detection device with it is described
Chip electrical connection is controlled, for switching to the 6th channel, and low-pressure end blowback electricity in the high-voltage end blowback solenoid valve
When magnet valve switches to eight channels, blowback trigger signal is sent to the control chip；The control chip and the triggering fill
Electrical connection is set, resets trigger signal for generating according to the blowback trigger signal, and be sent to trigger device；The triggering dress
It sets and switches to second channel for controlling the high-voltage end clearing solenoid valve according to the clearing trigger signal, control the low pressure
End resets solenoid valve and switches to fourth lane, and controls the differential pressure pick-up and be zeroed out operation.
Optionally, the detection device includes: rectification circuit, the first filter capacitor and bi-directional voltage stabilizing pipe；The control core
Piece is also used to switch to the 6th channel in the high-voltage end blowback solenoid valve, and the low-pressure end blowback solenoid valve switches to
When eight channels, AC signal is exported by AC signal output end；The input terminal of the rectification circuit and the control chip
AC signal output end electrical connection, for rectifying the AC signal to form direct current signal；The high level of the rectification circuit
Output end is electrically connected with the first connecting pin of first filter capacitor, the low level output end of the rectification circuit respectively with institute
State the second connection end and ground terminal electrical connection of the first filter capacitor；The bi-directional voltage stabilizing pipe is in parallel with first filter capacitor to be connected
It connects；The high level output end of the rectification circuit is electrically connected with the first input end of the control chip, described straight for exporting
Signal is flowed to the control chip.
Optionally, the trigger device includes: current-limiting resistance, switching tube, first diode, the first relay, the two or two
Pole pipe and the second relay；The control terminal that first output end of the control chip passes through the current-limiting resistance and the switching tube
Electrical connection；First connecting pin of the switching tube is electrically connected with the anode of the first diode, and the second of the switching tube connects
End is connect to be electrically connected with the ground terminal；The cathode of the first diode is electrically connected with the first level output end；First relay
The first input end of device is electrically connected with first level output end, and the second input terminal and the anode of the first diode are electrically connected
It connects, the first output end of first relay resets solenoid valve with the high-voltage end and is electrically connected, for controlling the high-voltage end
It resets solenoid valve and switches to second channel, second output terminal and the low-pressure end of first relay reset solenoid valve and be electrically connected
It connects, switches to fourth lane, the third output end difference of first relay for controlling the low-pressure end clearing solenoid valve
It is electrically connected with the first input end of the cathode of second diode and second relay；The second of second relay
Input terminal is electrically connected with the anode of second diode and the ground terminal respectively, the first output end of second relay and
The differential pressure pick-up electrical connection executes clear operation for controlling the differential pressure pick-up.
Optionally, the gas controlling device further include: temperature measures probe tube, temperature sensor, pressure measurement sampling
Pipe and pressure sensor；The temperature sensor is set to the input end of the temperature measurement probe tube, surveys for measuring temperature
Measure the temperature of the air-flow of probe tube acquisition；The pressure sensor is set to the outlet end of the pressure measurement probe tube, is used for
Measure the pressure of the air-flow of the pressure measurement probe tube acquisition.
Optionally, the gas controlling device further include: sampling Pitot tube；The sampling Pitot tube coats the high pressure gas
Flow probe tube, low-pressure air current probe tube, temperature measurement probe tube and pressure measurement probe tube.
Optionally, the gas controlling device further include: active installation flange；The active installation flange is set to
The periphery of the sampling Pitot tube；Position can on the extending direction along the sampling Pitot tube for the active installation flange
It adjusts.
Optionally, the gas controlling device further include: installation casing；The installation casing is leaned on the sampling Pitot tube
One end connection of the outlet end of the nearly high pressure draught probe tube；The differential pressure pick-up, high-voltage end reset solenoid valve, low-pressure end
It resets solenoid valve and pressure sensor is all set in inside the installation casing.
Optionally, the differential pressure pick-up is monocrystalline silicon differential pressure pickup or capacitor differential pressure pickup.
In the present invention, high-voltage end resets solenoid valve and passes through first passage connection high pressure draught probe tube and differential pressure pick-up
High-voltage end, so that the high pressure draught of high pressure draught probe tube acquisition is delivered to the high-voltage end of differential pressure pick-up by first passage,
Low-pressure end resets the low-pressure end that solenoid valve connects low-pressure air current probe tube and differential pressure pick-up by third channel, so that low pressure gas
The low-pressure air current of stream probe tube acquisition is delivered to the low-pressure end of differential pressure pick-up by third channel, and differential pressure pick-up can be to height
The differential pressure of pressure gas stream and low-pressure air current is detected, and high-voltage end resets solenoid valve and connects differential pressure pick-up by second channel
High-voltage end and low-pressure end reset the fourth lane of solenoid valve, the low-pressure end resets the fourth lane connection described the of solenoid valve
The low-pressure end in two channels and differential pressure pick-up, so that the low-pressure end and high-voltage end of differential pressure pick-up can pass through second channel and third
Channel connection, differential pressure pick-up can be zeroed out operation in the environment of no pressure difference, so that differential pressure pick-up can have
There is higher measuring accuracy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the present invention implements a kind of gas controlling device provided；
Fig. 2 is a kind of gas-monitoring schematic diagram provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another gas controlling device provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another gas controlling device provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of controller provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another controller provided in an embodiment of the present invention；
Fig. 7 is a kind of main view of gas controlling device provided in an embodiment of the present invention；
Fig. 8 is a kind of diagrammatic cross-section of the sampling part of gas controlling device provided in an embodiment of the present invention；
Fig. 9 is a kind of another diagrammatic cross-section of the sampling part of gas controlling device provided in an embodiment of the present invention；
Figure 10 is a kind of side view of gas controlling device provided in an embodiment of the present invention；
Figure 11 is the structural schematic diagram of supporting plate installation module provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
The embodiment of the invention provides a kind of gas controlling devices, are that the present invention implements the one kind provided with reference to Fig. 1, Fig. 1
The structural schematic diagram of gas controlling device, the gas controlling device include: high pressure draught probe tube 11, low-pressure air current probe tube
12, differential pressure pick-up 13, high-voltage end reset solenoid valve 14, low-pressure end resets solenoid valve 15 and controller 16；
High-voltage end reset solenoid valve 14 first end a be connected to the outlet end of high pressure draught probe tube 11, second end b with it is poor
The high-voltage end of pressure sensor 13 is connected to, and third end c is connected to the 6th end f that low-pressure end resets solenoid valve 15；High-voltage end resets electricity
First passage is formed between the first end a and second end b of magnet valve 14, forms second channel between second end b and third end c；
Low-pressure end reset solenoid valve 15 the 4th end d be connected to the outlet end of low-pressure air current probe tube 12, the 5th end e with it is poor
The low-pressure end of pressure sensor 13 is connected to；Third channel is formed between the 4th end d and the 5th end e of low-pressure end clearing solenoid valve 15,
Fourth lane is formed between 5th end e and the 6th end f；
The high-voltage end of differential pressure pick-up 13 is connected to by second channel with the 6th end f that low-pressure end resets solenoid valve 15, low
Pressure side is connected to by the fourth lane that low-pressure end resets solenoid valve 15 with the third end c that high-voltage end resets solenoid valve 14；
Controller 16 resets solenoid valve 14 with high-voltage end respectively and low-pressure end resets solenoid valve 15 and is electrically connected,
Controller 16 is used for: control high-voltage end resets solenoid valve 14 and switches to first passage, so that high pressure draught probe tube
The high pressure draught of 11 acquisitions is delivered to the high-voltage end of differential pressure pick-up 13 by first passage；It controls low-pressure end and resets solenoid valve 15
Third channel is switched to, so that the low-pressure air current that low-pressure air current probe tube 12 acquires passes through third channel to differential pressure pick-up 13
Low-pressure end；Control high-voltage end resets solenoid valve 14 and switches to second channel, and controls low-pressure end and reset solenoid valve 15 and switch to the
Four-way, so that differential pressure pick-up 13 is reset.
It is a kind of gas-monitoring schematic diagram provided in an embodiment of the present invention with reference to Fig. 2, Fig. 2, gas controlling device is measuring
When the differential pressure value of monitored gas, gas to be detected is generally protruded by high pressure draught probe tube 11 and low-pressure air current probe tube 12
Gas pipeline in, measurement gas pipeline 2 in gas differential pressure value so that user according to differential pressure value obtain gas pipeline
The concentration of emission and total release of the gas discharged in 2.Gas flow in gas pipeline 2 is as shown by the arrows in Figure 2, high pressure gas
The arrival end of stream probe tube 11 and low-pressure air current probe tube 12 is slightly in bending, and the entrance face of high pressure draught probe tube 11 is to gas
Stream flow direction bending, to obtain high pressure draught, the arrival end of low-pressure air current probe tube 12 is bent away from air flow direction, for obtaining
Low-pressure air current.
It continues to refer to figure 1, high pressure draught probe tube 11 resets the height of solenoid valve 14 and differential pressure pick-up 13 by high-voltage end
Pressure side connection, for high pressure draught to be delivered to differential pressure pick-up 13, low-pressure air current probe tube 12 resets electromagnetism by low-pressure end
Valve 15 is connected to the low-pressure end of differential pressure pick-up 13, for low-pressure air current to be delivered to differential pressure pick-up 13, so that differential pressure senses
Device 13 obtains the differential pressure value of monitored gas according to high pressure draught and low-pressure air current.
It includes three terminals: first end a, second end b and third end c, first end a and second that high-voltage end, which resets solenoid valve 14,
First passage is formed between the b of end, forms second channel between second end b and third end c.First end a and high pressure draught probe tube
11 outlet end connection, second end b is connected to the high-voltage end of differential pressure pick-up 13, so that the height that high pressure draught probe tube 11 acquires
Pressure gas stream is delivered to the high-voltage end of differential pressure pick-up 13 by first passage.
Similarly, it includes three terminals: the 4th end d, the 5th end e and the 6th end f, the 4th end d that low-pressure end, which resets solenoid valve 15,
And the 5th form third channel between the e of end, forms fourth lane between the 5th end e and the 6th end f.4th end d and low-pressure air current
The outlet end of probe tube 12 is connected to, and the 5th end e is connected to the low-pressure end of differential pressure pick-up 13, so that low-pressure air current probe tube 12 is adopted
The low-pressure air current of collection is delivered to the low-pressure end of differential pressure pick-up 13 by third channel.
The third end c that high-voltage end resets solenoid valve 14 is connected to the 6th end f that low-pressure end resets solenoid valve 15, i.e., differential pressure passes
The high-voltage end of sensor 13 is connected to by second channel with the 6th end f that low-pressure end resets solenoid valve 15, and low-pressure end passes through low-pressure end
The fourth lane for resetting solenoid valve 15 is connected to the third end c that high-voltage end resets solenoid valve 14.Controller 16 respectively with high-voltage end
Reset solenoid valve 14 and low-pressure end and reset solenoid valve 15 and be electrically connected, for control high-voltage end reset solenoid valve 14 in first passage and
Switch between second channel, and controls low-pressure end clearing solenoid valve 15 and switch between third channel and fourth lane.Then work as control
Device 16 processed controls high-voltage end clearing solenoid valve 14 and switches to second channel, and control low-pressure end resets solenoid valve 15 and switches to four-way
When road, the high-voltage end of differential pressure pick-up 13 can be made to be connected to low-pressure end, so that condition of the differential pressure pick-up 13 in no pressure difference
Under be zeroed out, guarantee reset accuracy, improve differential pressure pick-up 13 measurement accuracy.
Optionally, differential pressure pick-up 13 is monocrystalline silicon differential pressure pick-up or capacitor differential pressure transducer.Preferably, differential pressure passes
Sensor 13 is high overload differential pressure pick-up, to effectively prevent the damage of differential pressure pick-up caused by overloading.
In the present embodiment, high-voltage end resets solenoid valve and connects high pressure draught probe tube and differential pressure pick-up by first passage
High-voltage end so that the high pressure draught of high pressure draught probe tube acquisition is delivered to the high pressure of differential pressure pick-up by first passage
End, low-pressure end resets the low-pressure end that solenoid valve connects low-pressure air current probe tube and differential pressure pick-up by third channel, so that low
The low-pressure air current of pressure gas stream probe tube acquisition is delivered to the low-pressure end of differential pressure pick-up by third channel, and differential pressure pick-up can
The differential pressure of high pressure draught and low-pressure air current is detected, and high-voltage end resets solenoid valve and connects differential pressure biography by second channel
The high-voltage end and low-pressure end of sensor reset the fourth lane of solenoid valve, and the fourth lane that the low-pressure end resets solenoid valve connects institute
State the low-pressure end of second channel and differential pressure pick-up so that the low-pressure end and high-voltage end of differential pressure pick-up can by second channel and
Third channel connection, differential pressure pick-up can be zeroed out operation in the environment of no pressure difference, so that differential pressure pick-up energy
Enough measuring accuracies with higher.
It optionally, is the structural schematic diagram of another gas controlling device provided in an embodiment of the present invention with reference to Fig. 3, Fig. 3,
Gas controlling device further include: blowback air inlet pipe 17；Blowback air inlet pipe 17 respectively with the outlet end of high pressure draught probe tube 11 and
The outlet end of low-pressure air current probe tube 12 is connected to, for purge gas being delivered to high pressure draught probe tube 11 and low-pressure air current takes
Sample pipe 12.
, for high pressure draught probe tube 11 and low-pressure air current probe tube 12, the gas respectively acquired is by arrival end stream
To outlet end, and containing the granule foreign after many industrial treatments in its gas for respectively acquiring, it is easy to take high pressure draught
Sample pipe 11 and low-pressure air current probe tube 12 are blocked, and blowback air inlet pipe 17 can also be arranged in the present embodiment, and purge gas is by anti-
The arrival end input for blowing into tracheae 17, is exported by the outlet end of blowback air inlet pipe 17 to high pressure draught probe tube 11 and low-pressure air current
The outlet end of probe tube 12, so that purge gas is delivered to arrival end by the outlet end of high pressure draught probe tube 11, by low pressure gas
The outlet end of stream probe tube 12 is delivered to arrival end, thus to residual in high pressure draught probe tube 11 and low-pressure air current probe tube 12
Remaining impurity is cleared up, and the generation of dirt in high pressure draught probe tube 11 and low-pressure air current probe tube 12 is prevented.
It optionally, is the structural schematic diagram of another gas controlling device provided in an embodiment of the present invention with reference to Fig. 4, Fig. 4,
Gas controlling device further include: high-voltage end blowback solenoid valve 18 and low-pressure end blowback solenoid valve 19；High-voltage end blowback solenoid valve 18
The 7th end g be connected to the outlet end of high pressure draught probe tube 11, the 8th end h and high-voltage end reset the first end a of solenoid valve 14
Connection, the 9th end i are connected to blowback air inlet pipe 17；Is formed between the 7th end g and the 8th end h of high-voltage end blowback solenoid valve 18
Five-channel forms the 6th channel between the 7th end g and the 9th end i；Controller 16 is electrically connected with high-voltage end blowback solenoid valve 18, is used
Five-channel is switched in control high-voltage end blowback solenoid valve 18, so that high pressure draught probe tube 11 passes through Five-channel and high pressure
End resets the first end a connection of solenoid valve 14；Controller 16 is also used to control high-voltage end blowback solenoid valve 18, and to switch to the 6th logical
Road, so that blowback air inlet pipe 17 is connected to by the 6th channel with the outlet end of high pressure draught probe tube 11；Low-pressure end blowback electromagnetism
Tenth end j of valve 19 is connected to the outlet end of low-pressure air current probe tube 12, and the tenth one end k and low-pressure end reset the of solenoid valve 15
Four end d connection, the 12nd end m are connected to blowback air inlet pipe 17；The tenth end j and the tenth one end k of high-voltage end blowback solenoid valve 18
Between formed the 7th channel, between the tenth end j and the 12nd end m formed the 8th channel；Controller 16 and low-pressure end blowback electromagnetism
Valve 19 is electrically connected, and the 7th channel is switched to for controlling low-pressure end blowback solenoid valve 19, so that low-pressure air current probe tube 12 passes through
7th channel is connected to the 4th end d that low-pressure end resets solenoid valve 15；Controller 16 is also used to control low-pressure end blowback solenoid valve
19 switch to the 8th channel, so that blowback air inlet pipe 17 is taken by the 8th channel of low-pressure end blowback solenoid valve 19 with low-pressure air current
The outlet end of sample pipe 12 is connected to.
High-voltage end blowback solenoid valve 18 and low-pressure end blowback solenoid valve 19 are identical with high-voltage end clearing solenoid valve 14, include
Three terminals, two channels.Specifically, high-voltage end blowback solenoid valve 18 includes: the 7th end g, the 8th end h and the 9th end i, the 7th
Five-channel is formed between the g and the 8th end h of end, forms the 6th channel between the 7th end g and the 9th end i；Low-pressure end blowback electromagnetism
Valve 19 includes: the tenth end j, the tenth one end k and the 12nd end m, forms the 7th channel between the tenth end j and the tenth one end k, and the tenth
It holds and forms the 8th channel between j and the 12nd end m.
As shown in figure 4, the present embodiment can be arranged simultaneously, high-voltage end resets solenoid valve 14, low-pressure end resets solenoid valve 15, high
Pressure side blowback solenoid valve 18 and low-pressure end blowback solenoid valve 19, then gas-detecting device can have simultaneously probe tube blowback cleaning and
The function that differential pressure pick-up is reset.Under the control of the controller 16, low when high-voltage end blowback solenoid valve 18 switches to Five-channel
Pressure side blowback solenoid valve 19 switches to the 7th channel, and high-voltage end resets solenoid valve 14 and switches to first passage, and low-pressure end resets electricity
Magnet valve 15 switches to third channel, then the low-pressure air current that low-pressure air current probe tube 12 acquires can be transmitted to the low of differential pressure pick-up 13
Pressure side, the high pressure draught that high pressure draught probe tube 11 acquires can be transmitted to the high-voltage end of differential pressure pick-up 13, so that differential pressure senses
The measurement of the progress differential pressure value of device 13；And when high-voltage end blowback solenoid valve 18 switches to the 6th channel, low-pressure end blowback solenoid valve 19
The 8th channel is switched to, high-voltage end resets solenoid valve 14 and switches to second channel, and low-pressure end resets solenoid valve 15 and switches to the 4th
Channel, the then air-flow that low-pressure air current probe tube 12 and high pressure draught probe tube 11 acquire cannot be delivered to differential pressure pick-up 13, instead
The purge gas for blowing into the input of tracheae 17 passes through the 6th channel cleanup high pressure draught probe tube 11 of high-voltage end blowback solenoid valve 18
Interior dirt, and the dirt in the 8th channel cleanup low-pressure air current probe tube 11 for passing through low-pressure end blowback solenoid valve 19, this
Outside, high-voltage end resets solenoid valve 14 and switches to second channel, and low-pressure end resets solenoid valve 15 and switches to fourth lane, differential pressure sensing
The low-pressure end and high-voltage end of device 13 are connected, and differential pressure pick-up 13 can be zeroed out operation.Illustratively, gas controlling device into
During row monitoring, the cleaning of low-pressure air current probe tube 12 and high pressure draught probe tube 11 can be carried out at regular intervals, and
Operation is zeroed out to differential pressure pick-up 13.
It optionally, is a kind of structural schematic diagram of controller provided in an embodiment of the present invention, controller 16 with reference to Fig. 5, Fig. 5
It include: detection device 161, control chip 162 and trigger device 163；Detection device 161 is electrically connected with control chip 162, is used for
The 6th channel is switched in high-voltage end blowback solenoid valve 18, and when low-pressure end blowback solenoid valve 19 switches to eight channels, to
It controls chip 162 and sends blowback trigger signal；Control chip 162 is electrically connected with trigger device 163, is believed for being triggered according to blowback
It number generates and to reset trigger signal, and be sent to trigger device 163；Trigger device 163 is used for high according to trigger signal control is reset
Pressure side resets solenoid valve 14 and switches to second channel, and control low-pressure end resets solenoid valve 15 and switches to fourth lane, and controls difference
Pressure sensor 13 is zeroed out operation.
High-voltage end blowback solenoid valve 18 and low-pressure end blowback solenoid valve 19 can be controlled by control chip 162, can also be with
It is controlled by other controllers of gas controlling device, the switching in channel is carried out, to carry out low-pressure air current probe tube 12 and high pressure gas
Flow the blowback cleaning of probe tube 11.Detection device 161 can be with control high-voltage end blowback solenoid valve 18 and low-pressure end blowback solenoid valve
19 control chip 162 perhaps cut for issuing channel in control chip 162 or other controllers by the electrical connection of other controllers
When changing signal to control high-voltage end blowback solenoid valve 18 and low-pressure end blowback solenoid valve 19, detection signal, detection device are received
161 receive detection signal after generate blowback trigger signal be delivered to control chip 162, control chip 162 triggered according to blowback
Signal, which generates, resets trigger signal, and is sent to trigger device 163, and trigger device 163 controls high-voltage end clearing solenoid valve 14 and cuts
Second channel is shifted to, control low-pressure end resets solenoid valve 15 and switches to fourth lane, so that differential pressure pick-up two sides are connected, and controls
Differential pressure pick-up 13 processed is zeroed out operation.
It optionally, is the structural schematic diagram of another controller provided in an embodiment of the present invention, detection dress with reference to Fig. 6, Fig. 6
Setting 161 may include: rectification circuit 164, the first filter capacitor C1 and bi-directional voltage stabilizing pipe TVS；Control chip 162 is also used in height
Pressure side blowback solenoid valve 18 switches to the 6th channel, and when low-pressure end blowback solenoid valve 19 switches to eight channels, passes through friendship
It flows signal output end (N and L) and exports AC signal；The input terminal of rectification circuit 164 and the AC signal output end of controller 16
Electrical connection, for rectifying AC signal to form direct current signal；The filtering of the high level output end V0+ of rectification circuit 164 and first
The first connecting pin of capacitor C1 is electrically connected, the low level output end V0- of rectification circuit 164 respectively with the first filter capacitor C1 the
Two connecting pins and ground terminal GND electrical connection；Bi-directional voltage stabilizing pipe TVS is connected in parallel with the first filter capacitor C1；The height of rectification circuit 164
Level output end V0+ is electrically connected with the first input end PC1 of control chip 162, for exporting direct current signal to controlling chip
162。
If being switched by the channel that control chip 162 controls high-voltage end blowback solenoid valve 18 and low-pressure end blowback solenoid valve 19,
It then controls chip 162 and high-voltage end blowback solenoid valve 18 is being switched into the 6th channel, low-pressure end blowback solenoid valve 19 is switched to
When eight channels, AC signal is exported to detection device 161, in detection device 161 by AC signal output end (N and L)
Above-mentioned AC signal is converted to direct current signal by rectification circuit 164, and by the high level output end V0+ of rectification circuit 164 and low
Level output end V0- output.
The first filter capacitor is also connected between the high level output end V0+ and low level output end V0- of rectification circuit 164
C1, for being filtered to above-mentioned direct current signal, the high level output end V0+ of rectification circuit 164 passes through current-limiting resistance R2
The first input end PC1 of connection control chip 162, the low level output end V0- of rectification circuit 164 are connected by current-limiting resistance R2
Ground terminal GND, then rectification circuit 164 exports direct current signal to the first input end PC1 for controlling chip 162.Above-mentioned direct current signal is
For blowback trigger signal, clearing trigger signal can be generated according to above-mentioned blowback trigger signal by controlling chip 162, so that control chip
162 control trigger device 163 according to above-mentioned direct current signal.In addition, the high level output end V0+ of rectification circuit 164 and
Bi-directional voltage stabilizing pipe TVS is also connected between the V0- of low level output end, bi-directional voltage stabilizing pipe TVS can guarantee the height of rectification circuit 164
The stabilization of voltage difference, prevents high level output end V0+ and low level between level output end V0+ and low level output end V0-
Voltage difference is excessively high between output end V0-, has certain protective effect to control chip 162.Optionally, detection device 161
It can also include the second filter capacitor C2, the second filter capacitor C2 is connected in parallel with first wave capacitor C1, further to filter, is protected
The stabilization of the card output extremely direct current signal of control chip 162.
Optionally, with continued reference to Fig. 6, trigger device 163 may include: current-limiting resistance R3, switching tube M1, first diode
D1, the first relay KA1, the second diode D2 and the second relay KA2；First output end PC2 of control chip 162 passes through limit
Leakage resistance R3 is electrically connected with the control terminal of switching tube M1；The first connecting pin of switching tube M1 and the anode of first diode D1 are electrically connected
It connects, the second connection end of switching tube M1 is electrically connected with ground terminal GND；The cathode of first diode D1 and the first level output end V1 electricity
Connection；The first input end of first relay KA1 is electrically connected with the first level output end V1, the second input terminal and first diode
The anode electrical connection of D1, the first output end OUT1 of the first relay KA1 resets solenoid valve 14 with high-voltage end and is electrically connected, for controlling
High-voltage end processed resets solenoid valve 14 and switches to second channel, and the second output terminal OUT2 and low-pressure end of the first relay KA1 is reset
Solenoid valve 15 is electrically connected, and switches to fourth lane for controlling low-pressure end clearing solenoid valve 15, the third of the first relay KA1 is defeated
Outlet OUT3 is electrically connected with the first input end of the cathode of the second diode D2 and the second relay KA2 respectively；Second relay
The second input terminal of KA2 is electrically connected with the anode and ground terminal GND of the second diode D2 respectively, and the first of the second relay KA2 is defeated
Outlet OUT4 is electrically connected with differential pressure pick-up 13, executes clear operation for controlling differential pressure pick-up 13.
Control chip 162 can generate a clearing trigger signal according to above-mentioned direct current signal (blowback trigger signal), and will
It resets trigger signal and is sent to trigger device 163, specifically, control chip 162 resets triggering by the first output end PC2 output
Signal to switching tube M1 control terminal, illustratively, as shown in fig. 6, control chip 162 can pass through current-limiting resistance R3 and switching tube
The control terminal of M1 is electrically connected.The first end of switching tube M1 is electrically connected with the first relay KA1, and second end is electrically connected with ground terminal GND,
For under the control for resetting trigger signal, the first relay KA1 of control to work.Illustratively, if switching tube M1 high level is led
Logical, low level turns off, then resetting starting signal is high level signal, then when control chip 162 exports high level signal to switch
When the control terminal of pipe M1, the electric current of switching tube M1 conducting, the first level output end V1 output passes through the coil of the first relay KA1
The first end of switching tube M1 is flowed to, and is flowed out by the second end of switching tube M1, so that the first relay KA1 works, first
The first output end OUT1 of relay KA1 resets solenoid valve 14 with high-voltage end and is electrically connected, the second output terminal of the first relay KA1
OUT2 resets solenoid valve 15 with low-pressure end and is electrically connected, and for controlling, high-voltage end resets solenoid valve 14 and low-pressure end resets solenoid valve 15
The switching of internal channel, specifically, it is clear that the first relay KA1 controls high-voltage end when the coil of the first relay KA1 flows through electric current
Zero solenoid valve 14 switches to second channel, and control low-pressure end resets solenoid valve 15 and switches to fourth lane, this moment, with reference to Fig. 4, control
High-voltage end blowback solenoid valve 18 is switched to the 6th channel by coremaking piece 162, and low-pressure end blowback solenoid valve 19 is switched to the 8th
Channel, and control high-voltage end and reset solenoid valve 14 and switch to second channel, control low-pressure end reset solenoid valve 15 and switch to the
Four-way, then gas-detecting device can carry out the blowback cleaning behaviour of low-pressure air current probe tube 12 and high pressure draught probe tube 11 simultaneously
Make the clear operation with differential pressure sensing.
Second channel is switched to when high-voltage end resets solenoid valve 14, low-pressure end resets solenoid valve 15 and switches to fourth lane
When, the two sides connection of differential pressure pick-up 13, i.e. the two sides pressure difference of differential pressure pick-up 13 is zero, so that the clearing of differential pressure pick-up 13
Effect is more accurate, prevents from resetting halfway problem caused by because of 13 two sides pressure difference of differential pressure pick-up.Electricity is reset in high-voltage end
Magnet valve 14 switches to second channel, when low-pressure end clearing solenoid valve 15 switches to fourth lane, i.e. 13 liang of side pressures of differential pressure pick-up
When difference is zero, the first relay KA1 outputs current to the coil of the second relay KA2 by third output end OUT3, so that the
Two relay KA2 work.Differential pressure pick-up 13 is controlled by the second relay KA2 and is zeroed out operation, specifically, the second relay
The first output end OUT4 of device KA2 is electrically connected with differential pressure pick-up 13, for controlling differential pressure pick-up 13.
In addition, the first input end of the first relay KA1 is electrically connected with the cathode of first diode D1, the first relay
The second input terminal of KA1 is electrically connected with the anode of first diode D1, then first diode D1 can be with the first relay KA1 shape
At circuit, so that the electric current generated to the coil of the first relay KA1 carries out in the moment that the first relay KA1 is turned off suddenly
It releases, and switch tube M1 is protected.Similarly, the cathode of the first input end of the second relay KA2 and the second diode D2
Electrical connection, the second input terminal of the second relay KA2 are electrically connected with the anode of the second diode D2, then the second diode D2 can
It is formed into a loop with the second relay KA2, in the moment that the second relay KA2 is turned off suddenly, the coil of the second relay KA2 is produced
Raw electric current is released.
Optionally, the first relay KA1 and the second relay KA2 can carry delay function, periodically to differential pressure pick-up 13
It realizes and resets, reduce affected by environment lead to the problem of of differential pressure pick-up 13 and drift about to cause test inaccuracy.
Fig. 7 is a kind of main view of gas controlling device provided in an embodiment of the present invention, as shown in fig. 7, gas-monitoring fills
It sets including sampling part 4 and detection part 3, sampling part 4 is for being inserted into the gas pipeline of under test gas, under test gas
Flow monitoring is carried out, detection part 3 is provided with the detection devices such as differential pressure pick-up 13.
Fig. 8 is a kind of diagrammatic cross-section of the sampling part of gas controlling device provided in an embodiment of the present invention, and Fig. 9 is this
The section of a kind of another diagrammatic cross-section of the sampling part for gas controlling device that inventive embodiments provide, Fig. 8 and Fig. 9 are phase
Mutually vertical relationship, optionally, with reference to Fig. 7 to Fig. 9, gas controlling device can also include: temperature measurement probe tube 21, temperature
Sensor 24, pressure measurement probe tube 22 and pressure sensor 25；Temperature sensor 24 is set to temperature measurement probe tube 21
Input end, for measuring the temperature for the air-flow that temperature measurement probe tube 21 acquires；Pressure sensor 25 is set to pressure measurement and takes
The outlet end of sample pipe 22, the pressure of the air-flow for measuring the acquisition of pressure measurement probe tube.
In this implementation, the sampling part 4 of gas controlling device is integrated with high pressure draught probe tube 11, low-pressure air current probe tube
12, temperature measurement probe tube 21 and pressure measurement probe tube 22, so that differential pressure pick-up can be according to high pressure draught and low
Pressure gas stream obtains air-flow differential pressure, and temperature sensor 24 measures the temperature of the gas flow measurement air-flow of probe tube 21, pressure according to temperature
Sensor 25 is used to obtain the pressure of 22 interior air-flow of pressure measurement probe tube, thus gas controlling device be integrated with differential pressure measurement,
The function of temperature measurement and pressure measurement, measures above-mentioned differential pressure, temperature referring now to discrete instrument is arranged in the prior art respectively
Degree and pressure reduce the influence of a variety of instrument installation sites in the present embodiment, and integrated level is high, reduces manufacturing cost.Meanwhile pacifying
Dress is convenient, is easy to debug and safeguard.
Optionally, with continued reference to Fig. 7 to Fig. 9, gas controlling device can also include: sampling Pitot tube 23；Sample skin support
Pipe 23 coats high pressure draught probe tube 11, low-pressure air current probe tube 12, temperature measurement probe tube 21 and pressure measurement probe tube 22.
Sampling Pitot tube 23 makes high pressure draught probe tube 11, low-pressure air current probe tube 12, temperature measurement probe tube 21 and pressure measurement
Probe tube 22 enjoys an insertion pipeline jointly, convenient for the work of gas controlling device, it is not necessary to by high pressure draught probe tube 11, low
Pressure gas stream probe tube 12, temperature measurement probe tube 21 and pressure measurement probe tube 22 are inserted into gas pipeline respectively and are detected.
Optionally, with continued reference to Fig. 7, gas controlling device can also include: active installation flange 26；Active installation
Flange 26 is set to the periphery of sampling Pitot tube 23；Active installation flange 26 is upper in the extending direction along sampling Pitot tube 23
It sets adjustable.Active installation flange 26 can carry out position along sampling Pitot tube 23 and move, convenient for according to the diameter pair of gas pipeline
Position of the active installation flange 26 on sampling Pitot tube 23 is adjusted, and fixedly mounted structure and sampling Pitot tube 23
The distance of insertion gas pipeline one end be it is fixed, then fixedly mounted structure is only applicable to the fixed flue of diameters
Road, gas controlling device uses active installation flange 26 in the present embodiment, enhances the versatility of gas controlling device, increases
The scope of application of gas controlling device.
Optionally, with continued reference to Fig. 7, gas controlling device can also include: installation casing 27；Installation casing 27 and sampling
Pitot tube 23 is connected to close to one end of the outlet end of high pressure draught probe tube 11；Differential pressure pick-up 13, high-voltage end reset solenoid valve
14, low-pressure end resets solenoid valve 15 and pressure sensor is all set in inside installation casing.
It is a kind of side view of gas controlling device provided in an embodiment of the present invention, gas-monitoring dress with reference to Figure 10, Figure 10
It include that supporting plate installs module 28 in the detection part 3 set, supporting plate installation module 28 is equipped with the elements such as differential pressure pick-up, specifically
, it is the structural schematic diagram of supporting plate installation module provided in an embodiment of the present invention with reference to Figure 11, Figure 11, supporting plate installation module 28 is set
It is equipped with mounting plate 29, differential pressure pick-up 13, controller 16, high-voltage end are installed on mounting plate 29 and reset solenoid valve 14, low-pressure end
Reset solenoid valve 15, high-voltage end blowback solenoid valve 18 and low-pressure end blowback solenoid valve 19.Pass through gas circuit pipe between each solenoid valve
Road 31 is connected to, in addition, between solenoid valve and differential pressure pick-up 13 and being also to pass through gas circuit pipe between probe tube and each solenoid valve
Road 31 is connected to.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (11)
1. a kind of gas controlling device characterized by comprising high pressure draught probe tube, low-pressure air current probe tube, differential pressure sensing
Device, high-voltage end reset solenoid valve, low-pressure end resets solenoid valve and controller；
The first end that the high-voltage end resets solenoid valve is connected to the outlet end of the high pressure draught probe tube, second end with it is described
The high-voltage end of differential pressure pick-up is connected to, and third end is connected to the 6th end that the low-pressure end resets solenoid valve；The high-voltage end is clear
First passage is formed between the first end and second end of zero solenoid valve, forms second channel between second end and third end；
The 4th end that the low-pressure end resets solenoid valve is connected to the outlet end of the low-pressure air current probe tube, the 5th end with it is described
The low-pressure end of differential pressure pick-up is connected to；Third channel is formed between the 4th end and the 5th end of the low-pressure end clearing solenoid valve,
Fourth lane is formed between 5th end and the 6th end；
The high-voltage end of the differential pressure pick-up is connected to by the second channel with the 6th end that the low-pressure end resets solenoid valve,
The third end that the low-pressure end resets the fourth lane of solenoid valve by the low-pressure end and the high-voltage end resets solenoid valve connects
It is logical；
The controller resets solenoid valve with the high-voltage end respectively and the low-pressure end resets solenoid valve and is electrically connected,
The controller is used for: being controlled the high-voltage end clearing solenoid valve and is switched to first passage, so that the high pressure draught takes
The high pressure draught of sample pipe acquisition is delivered to the high-voltage end of the differential pressure pick-up by the first passage；Control the low-pressure end
It resets solenoid valve and switches to third channel, so that the low-pressure air current of low-pressure air current probe tube acquisition passes through the third channel
To the low-pressure end of the differential pressure pick-up；It controls the high-voltage end clearing solenoid valve and switches to second channel, and control described low
Pressure side resets solenoid valve and switches to fourth lane, so that the differential pressure pick-up is reset.
2. gas controlling device according to claim 1, which is characterized in that further include: blowback air inlet pipe；
The blowback air inlet pipe outlet with the outlet end of the high pressure draught probe tube and the low-pressure air current probe tube respectively
End connection, for purge gas to be delivered to the high pressure draught probe tube and low-pressure air current probe tube.
3. gas controlling device according to claim 2, which is characterized in that further include: high-voltage end blowback solenoid valve and low
Pressure side blowback solenoid valve；
7th end of the high-voltage end blowback solenoid valve is connected to the outlet end of the high pressure draught probe tube, the 8th end with it is described
High-voltage end resets the first end connection of solenoid valve, and the 9th end is connected to the blowback air inlet pipe；The high-voltage end blowback solenoid valve
The 7th end and the 8th end between form Five-channel, between the 7th end and the 9th end formed the 6th channel；
The controller is electrically connected with the high-voltage end blowback solenoid valve, is switched to for controlling the high-voltage end blowback solenoid valve
Five-channel, so that the high pressure draught probe tube resets the first end of solenoid valve by the Five-channel and the high-voltage end
Connection；The controller is also used to control the high-voltage end blowback solenoid valve and switches to the 6th channel, so that the blowback air inlet
Pipe is connected to by the 6th channel with the outlet end of the high pressure draught probe tube；
Tenth end of the low-pressure end blowback solenoid valve is connected to the outlet end of the low-pressure air current probe tube, the tenth one end and institute
The 4th end connection that low-pressure end resets solenoid valve is stated, the 12nd end is connected to the blowback air inlet pipe；The high-voltage end blowback electricity
The 7th channel is formed between tenth end of magnet valve and the tenth one end, and the 8th channel is formed between the tenth end and the 12nd end；
The controller is electrically connected with the low-pressure end blowback solenoid valve, is switched to for controlling the low-pressure end blowback solenoid valve
7th channel, so that the low-pressure air current probe tube resets the 4th end of solenoid valve by the 7th channel and the low-pressure end
Connection；The controller is also used to control the low-pressure end blowback solenoid valve and switches to the 8th channel, so that the blowback air inlet
Pipe is connected to by the 8th channel of the low-pressure end blowback solenoid valve with the outlet end of the low-pressure air current probe tube.
4. gas controlling device according to claim 3, which is characterized in that the controller includes: detection device, control
Chip and trigger device；
The detection device is electrically connected with the control chip, logical for switching to the 6th in the high-voltage end blowback solenoid valve
Road, and when the low-pressure end blowback solenoid valve switches to eight channels, blowback trigger signal is sent to the control chip；
The control chip is electrically connected with the trigger device, resets triggering letter for generating according to the blowback trigger signal
Number, and it is sent to trigger device；The trigger device, which is used to control the high-voltage end according to the clearing trigger signal, resets electricity
Magnet valve switches to second channel, controls the low-pressure end clearing solenoid valve and switches to fourth lane, and controls the differential pressure sensing
Device is zeroed out operation.
5. gas controlling device according to claim 4, which is characterized in that the detection device includes: rectification circuit,
One filter capacitor and bi-directional voltage stabilizing pipe；
The control chip is also used to switch to the 6th channel, and the low-pressure end blowback in the high-voltage end blowback solenoid valve
When solenoid valve switches to eight channels, AC signal is exported by AC signal output end；
The input terminal of the rectification circuit is electrically connected with the AC signal output end of the control chip, for believing the exchange
Number rectification forms direct current signal；
The high level output end of the rectification circuit is electrically connected with the first connecting pin of first filter capacitor, the rectified current
The low level output end on road is electrically connected with the second connection end of first filter capacitor and ground terminal respectively；The bi-directional voltage stabilizing pipe
It is connected in parallel with first filter capacitor；
The high level output end of the rectification circuit is electrically connected with the first input end of the control chip, described straight for exporting
Signal is flowed to the control chip.
6. gas controlling device according to claim 5, which is characterized in that the trigger device includes: current-limiting resistance, opens
Guan Guan, first diode, the first relay, the second diode and the second relay；
First output end of the control chip is electrically connected by the current-limiting resistance with the control terminal of the switching tube；It is described to open
The first connecting pin for closing pipe is electrically connected with the anode of the first diode, the second connection end of the switching tube and the ground terminal
Electrical connection；The cathode of the first diode is electrically connected with the first level output end；
The first input end of first relay is electrically connected with first level output end, the second input terminal and described first
The anode electrical connection of diode, the first output end of first relay reset solenoid valve with the high-voltage end and are electrically connected, use
Second channel, the second output terminal and the low pressure of first relay are switched in controlling the high-voltage end clearing solenoid valve
End resets solenoid valve electrical connection, switches to fourth lane, first relay for controlling the low-pressure end clearing solenoid valve
Third output end be electrically connected respectively with the first input end of the cathode of second diode and second relay；
Second input terminal of second relay is electrically connected with the anode of second diode and the ground terminal respectively, described
First output end of the second relay is electrically connected with the differential pressure pick-up, executes clearing behaviour for controlling the differential pressure pick-up
Make.
7. gas controlling device according to claim 1, which is characterized in that further include: temperature measures probe tube, temperature passes
Sensor, pressure measurement probe tube and pressure sensor；
The temperature sensor is set to the input end of the temperature measurement probe tube, for measuring temperature measurement probe tube acquisition
Air-flow temperature；
The pressure sensor is set to the outlet end of the pressure measurement probe tube, for measuring the pressure measurement probe tube
The pressure of the air-flow of acquisition.
8. gas controlling device according to claim 7, which is characterized in that further include: sampling Pitot tube；
The sampling Pitot tube coats the high pressure draught probe tube, low-pressure air current probe tube, temperature measurement probe tube and pressure
Measure probe tube.
9. gas controlling device according to claim 8, which is characterized in that further include: active installation flange；
The active installation flange is set to the periphery of the sampling Pitot tube；
Active installation flange position on the extending direction along the sampling Pitot tube is adjustable.
10. gas controlling device according to claim 8, which is characterized in that further include: installation casing；
One end of outlet end of the installation casing with the sampling Pitot tube close to the high pressure draught probe tube is connected to；
The differential pressure pick-up, high-voltage end clearing solenoid valve, low-pressure end clearing solenoid valve and pressure sensor are all set in described
Inside installation casing.
11. -10 described in any item gas controlling devices according to claim 1, which is characterized in that
The differential pressure pick-up is monocrystalline silicon differential pressure pickup or capacitor differential pressure pickup.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111189578A (en) * | 2020-03-04 | 2020-05-22 | 广西玉柴机器股份有限公司 | System and method for testing differential pressure sensor |
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| CN111189578A (en) * | 2020-03-04 | 2020-05-22 | 广西玉柴机器股份有限公司 | System and method for testing differential pressure sensor |
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