CN220381102U - Gas-capacitance type constant pressure system for exhaust - Google Patents
Gas-capacitance type constant pressure system for exhaust Download PDFInfo
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- CN220381102U CN220381102U CN202322209073.9U CN202322209073U CN220381102U CN 220381102 U CN220381102 U CN 220381102U CN 202322209073 U CN202322209073 U CN 202322209073U CN 220381102 U CN220381102 U CN 220381102U
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- pressure
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- gas
- connector
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000007789 gas Substances 0.000 claims abstract description 35
- 230000001105 regulatory effect Effects 0.000 claims abstract description 29
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 23
- 210000003437 trachea Anatomy 0.000 claims 2
- 230000029058 respiratory gaseous exchange Effects 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 18
- 238000001514 detection method Methods 0.000 abstract description 7
- 239000013589 supplement Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to the technical field of gas detection, in particular to a gas-volume type constant pressure system for exhaust, which comprises an exhaust source connector, a pressure regulating valve, a venturi jet device, a flare opening connector, a nitrogen source connector, a primary pressure reducing valve and a secondary pressure reducing valve, wherein the exhaust source connector, the pressure regulating valve, the venturi jet device and the flare opening connector are sequentially connected through a gas pipe, the nitrogen source connector, the primary pressure regulating valve and the secondary pressure reducing valve are respectively and simultaneously connected through a tee joint, the nitrogen source connector is respectively connected with the primary pressure reducing valve and the air inlet end of the venturi jet device through the tee joint, the pressure regulating valve is connected with the air inlet end of the venturi jet device, and the output end of the venturi jet device is connected with the flare opening connector. The system ensures stable pressure and continuous exhaust at the joint of the exhaust source, improves the accuracy of the detection instrument, effectively avoids the impact of high pressure of the torch combustion system on a low-pressure pipeline, and improves the service life and the use safety.
Description
Technical Field
The utility model relates to the technical field of gas detection, in particular to a gas-capacitance type constant pressure system for exhaust.
Background
In tail gas detection industry, because the environmental protection requirement, the tail gas that contains harmful substance does not allow direct exhaust to enlarge gas after the detection finishes, needs to be discharged into the torch combustion system and handles, but the atmospheric pressure in the torch pipeline is all higher than atmospheric pressure and unstable, leads to the instrumentation backpressure that is connected with the torch combustion system too high, and pressure fluctuation is big simultaneously, and is unstable, seriously influences the analysis result of instrumentation, also can lead to the tail gas in the instrument to be difficult to discharge.
Disclosure of Invention
In order to solve the problems, the utility model provides a gas-capacitance type constant pressure system for exhaust, which is connected between the exhaust end of a detector and the air inlet end of a torch combustion system, ensures the pressure stability at the joint of an exhaust source, improves the accuracy of the detector, effectively avoids the impact of high pressure of the torch combustion system on a low-pressure pipeline, and improves the service life and the use safety.
The technical scheme adopted by the utility model is that the air-volume type constant pressure system for exhausting is provided, and comprises an exhaust source connector, a pressure regulating valve, a venturi jet device and a flare opening connector which are sequentially connected through an air pipe, a nitrogen source connector, a primary pressure reducing valve and a secondary pressure reducing valve which are sequentially connected through the air pipe, wherein the exhaust source connector is respectively and simultaneously connected with the pressure regulating valve and the secondary pressure reducing valve through a tee joint, the nitrogen source connector is respectively connected with the primary pressure reducing valve and an air inlet end of the venturi jet device through the tee joint, the pressure regulating valve is connected with an air suction end of the venturi jet device, and an output end of the venturi jet device is connected with the flare opening connector.
And an air tank is connected between the pressure regulating valve and the Venturi ejector.
And a one-way valve is connected between the venturi jet device and the gas container.
And a one-way valve is connected between the pressure regulating valve and the Venturi ejector.
And a vacuum flowmeter is connected between the pressure regulating valve and the exhaust source joint.
The secondary pressure reducing valve is a pressure reducing valve with a diffusing function.
And the first pressure gauges are respectively connected between the exhaust source connector, the nitrogen source connector and the primary pressure reducing valve, between the primary pressure reducing valve and the secondary pressure reducing valve and between the Venturi ejector and the flare opening connector.
And a second pressure gauge is connected between the vacuum flowmeter and the pressure regulating valve.
The beneficial effects of the utility model are as follows:
1. the system provides a high-pressure nitrogen source for the Venturi ejector through one high-pressure nitrogen source, supplements air and supplements pressure for the joint of the exhaust source after two times of pressure reduction through the other high-pressure nitrogen source, sucks tail gas from the joint of the exhaust source through the low-pressure end of the Venturi ejector, effectively ensures continuous exhaust, adopts a vacuum pressure regulating valve, changes the vacuum size generated by the Venturi ejector along with the back pressure generated by a torch combustion system, sets pressure at the secondary side of the pressure regulating valve to be smaller than the minimum pressure of the Venturi ejector, and realizes stable vacuum pressure.
2. When the venturi jet device can not generate vacuum due to the instantaneous ultrahigh back pressure of the torch combustion system, the vacuum in the venturi jet device can still provide vacuum for the system in a short time, after the ultrahigh back pressure is reduced, the venturi jet device continuously supplements vacuum for the vacuum tank, the pressure of the exhaust source joint and the pipeline of the air containing tank cannot change in the process, and the mixed gas of the tail gas and the nitrogen of the exhaust source joint is subjected to constant-pressure and quantitative extraction and suction.
3. The one-way valve is added, so that the high pressure of the torch combustion system cannot enter the low pressure pipeline, and the high pressure of the torch combustion system is further effectively prevented from damaging low pressure devices and affecting the joint of the exhaust source by matching with the gas tank, thereby ensuring the pressure stability of the joint of the exhaust source.
Drawings
Fig. 1 is a block diagram of the structure of the present utility model.
In the drawing, 1, an exhaust source connector, 2, a pressure regulating valve, 3, a Venturi ejector, 4, a flare opening connector, 5, a nitrogen source connector, 6, a primary pressure reducing valve, 7, a secondary pressure reducing valve, 8, a gas holding tank, 9, a one-way valve, 10, a vacuum flowmeter, 11, a first pressure gauge, 12 and a second pressure gauge.
Detailed Description
As shown in fig. 1, the utility model provides a gas-volume type constant pressure system for exhaust, which comprises an exhaust source connector 1, a pressure regulating valve 2, a venturi jet 3 and a flare opening connector 4 which are sequentially connected through a gas pipe, a nitrogen source connector 5, a primary pressure reducing valve 6 and a secondary pressure reducing valve 7 which are sequentially connected through the gas pipe, wherein the exhaust source connector 1 is respectively and simultaneously connected with the pressure regulating valve 2 and the secondary pressure reducing valve 7 through a tee joint, the nitrogen source connector 5 is respectively connected with the primary pressure reducing valve 6 and the air inlet end of the venturi jet 3 through the tee joint, the pressure regulating valve 2 is connected with the air inlet end of the venturi jet 3, and the output end of the venturi jet 3 is connected with the flare opening connector 4.
The system is arranged between a detection instrument and a torch combustion system, tail gas enters a constant pressure system through an exhaust source connector 1 after being detected in the detection instrument, a nitrogen source is connected to a nitrogen source connector 5, the nitrogen enters the venturi jet device 3 through being divided into two paths, one path directly enters the venturi jet device 3, a high-pressure nitrogen source is provided for the venturi jet device 3, the other path is depressurized through a primary depressurization valve 6 and a secondary depressurization valve 7 and then is converged with tail gas entering the exhaust source connector 1, the tail gas enters the venturi jet device 3 after passing through a pressure regulating valve 2 under the suction force of the low pressure end of the venturi jet device 3, and the tail gas is mixed with the high-pressure gas source in the venturi jet device 3 and then discharged into the torch combustion system after passing through a torch mouth connector 4. The system supplies air to the Venturi ejector 3 through one high-pressure nitrogen source, supplements air and supplements pressure to the position of the exhaust source connector 1 after two times of pressure reduction through the other high-pressure nitrogen source, sucks tail gas from the position of the exhaust source connector 1 through the low-pressure end of the Venturi ejector 3, guarantees continuous exhaust, the pressure regulating valve 2 adopts a vacuum pressure regulating valve, the vacuum size generated by the Venturi ejector 3 changes along with the back pressure generated by a torch combustion system, and the set pressure of the secondary side of the pressure regulating valve 2 is smaller than the minimum pressure of the Venturi ejector 3, so that stable vacuum pressure is realized.
As shown in fig. 1, a gas tank 8 is connected between the pressure regulating valve 2 and the venturi ejector 3.
When the venturi jet device 3 can not generate vacuum due to the instantaneous ultrahigh back pressure of the torch combustion system, the vacuum in the venturi jet device 8 can still provide vacuum for the system in a short time, after the ultrahigh back pressure is reduced, the venturi jet device 3 continuously supplements vacuum for the vacuum tank, the pressure of the pipelines of the exhaust source joint 1 and the air containing tank 8 can not change in the process, and the mixed gas of the tail gas and the nitrogen of the exhaust source joint 1 is pumped and sucked in a constant pressure and quantitative mode.
As shown in fig. 1, a one-way valve 9 is connected between the venturi ejector 3 and the air container 8.
The one-way valve 9 is added, so that the high pressure of the torch combustion system cannot enter the low pressure pipeline, and the high pressure of the torch combustion system is matched with the gas tank 8, so that the damage to low pressure devices and the influence to the position of the exhaust source joint 1 caused by the high pressure of the torch combustion system are further effectively avoided, and the pressure stability of the position of the exhaust source joint 1 is ensured.
As shown in fig. 1, a one-way valve 9 is connected between the pressure regulating valve 2 and the venturi ejector 3.
The check valve 9 is added, so that the high pressure of the torch combustion system cannot enter the low pressure pipeline, and the damage to low pressure devices and the influence on the position of the exhaust source joint 1 caused by the high pressure of the torch combustion system are effectively avoided.
As shown in fig. 1, a vacuum flowmeter 10 is connected between the pressure regulating valve 2 and the exhaust source connector 1.
The vacuum flowmeter 10 is used for displaying, metering and adjusting the flow, and when in initial use, the tail gas supply is turned off, the flow knob is adjusted to set the flow within the maximum suction flow range of the venturi ejector 3, and then the tail gas supply is turned on, and the flow display is kept unchanged.
As shown in fig. 1, the secondary pressure reducing valve 7 is a pressure reducing valve with a bleeding function.
The secondary pressure reducing valve 7 can be used for pressure relief when the pressure in the pipeline reaches above a preset value, so that the stability of the pressure in the pipeline is further ensured.
As shown in fig. 1, a first pressure gauge 11 is connected between the exhaust gas source joint 1, the nitrogen gas source joint 5 and the primary pressure reducing valve 6, between the primary pressure reducing valve 6 and the secondary pressure reducing valve 7, and between the venturi jet device 3 and the flare opening joint 4.
The pressure values of all the positions are displayed through the first pressure gauge 11, so that the use convenience and the safety are improved.
As shown in fig. 1, a second pressure gauge 12 is connected between the vacuum flowmeter and the pressure regulating valve 2.
The pressure value is displayed by the second pressure gauge 12, so that the convenience and safety of use are improved.
Claims (8)
1. An air-tolerant constant pressure system for exhaust, characterized in that: including exhaust source connects (1), air-vent valve (2), venturi ejector (3) and flare opening connect (4) that connect gradually through the trachea, nitrogen source connects (5), once relief pressure valve (6) and secondary relief pressure valve (7) that connect gradually through the trachea, exhaust source connects (1) and is connected simultaneously with air-vent valve (2), secondary relief pressure valve (7) respectively through the tee bend, nitrogen source connects (5) and is connected with primary relief pressure valve (6), venturi ejector (3) inlet end respectively through the tee bend, air-vent valve (2) are connected with venturi ejector (3) end of breathing in, venturi ejector (3) output is connected with flare opening connect (4).
2. A gas-volumetric constant pressure system for exhaust gas according to claim 1, wherein: an air tank (8) is connected between the pressure regulating valve (2) and the Venturi ejector (3).
3. A gas-volumetric constant pressure system for exhaust gas according to claim 2, wherein: a one-way valve (9) is connected between the venturi jet device (3) and the air-holding tank (8).
4. A gas-volumetric constant pressure system for exhaust gas according to claim 1, wherein: a one-way valve (9) is connected between the pressure regulating valve (2) and the Venturi ejector (3).
5. A gas-volumetric constant pressure system for exhaust gas according to claim 1, wherein: a vacuum flowmeter (10) is connected between the pressure regulating valve (2) and the exhaust source joint (1).
6. A gas-volumetric constant pressure system for exhaust gas according to claim 1, wherein: the secondary pressure reducing valve (7) is a pressure reducing valve with a diffusing function.
7. A gas-volumetric constant pressure system for exhaust gas according to claim 1, wherein: the first pressure gauge (11) is connected between the exhaust source connector (1), the nitrogen source connector (5) and the primary pressure reducing valve (6), between the primary pressure reducing valve (6) and the secondary pressure reducing valve (7) and between the Venturi ejector (3) and the flare opening connector (4).
8. A gas-volumetric constant pressure system for exhaust gas according to claim 1, wherein: a second pressure gauge (12) is connected between the vacuum flowmeter and the pressure regulating valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322209073.9U CN220381102U (en) | 2023-08-16 | 2023-08-16 | Gas-capacitance type constant pressure system for exhaust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322209073.9U CN220381102U (en) | 2023-08-16 | 2023-08-16 | Gas-capacitance type constant pressure system for exhaust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220381102U true CN220381102U (en) | 2024-01-23 |
Family
ID=89564601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322209073.9U Active CN220381102U (en) | 2023-08-16 | 2023-08-16 | Gas-capacitance type constant pressure system for exhaust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220381102U (en) |
-
2023
- 2023-08-16 CN CN202322209073.9U patent/CN220381102U/en active Active
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