CN209589962U - Gravity-flow ventilation influences test device to gas component distribution in the single radial cut confined space - Google Patents
Gravity-flow ventilation influences test device to gas component distribution in the single radial cut confined space Download PDFInfo
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- CN209589962U CN209589962U CN201821998326.8U CN201821998326U CN209589962U CN 209589962 U CN209589962 U CN 209589962U CN 201821998326 U CN201821998326 U CN 201821998326U CN 209589962 U CN209589962 U CN 209589962U
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- confined space
- gravity
- flow ventilation
- sensor
- single radial
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Abstract
The utility model relates to confined space operation safety fields, disclosing a kind of gravity-flow ventilation influences test device to gas component distribution in the single radial cut confined space, described device includes gravity-flow ventilation simulation system, single radial cut confined space simulation system, the simulation of confined space gaseous environment and data acquisition control system, the device, which can measure gravity-flow ventilation wind speed, influences gas component distribution in the single radial cut confined space, measurement result can provide technical support for the arrangement of measuring point after gravity-flow ventilation length of time in confined space operation process and gravity-flow ventilation, it effectively improves operating efficiency and operation safety is horizontal.
Description
Technical field
The utility model relates to confined space operation safety fields more particularly to a kind of gravity-flow ventilation to the limited sky of single radial cut
Interior gas component distribution influences test device.
Background technique
The confined space is since it is chronically at closing or semi-closed state, and entrance is limited, and gravity-flow ventilation is bad, easily
Cause accumulation and the oxygen concentration of toxic and harmful gas relatively low, there are some potential safety problemss for operation inside it by worker, easily
The generation to cause the accident.To guarantee that confined space operating personnel is safe, clearly stipulate that into limited in domestic and international relevant criterion
It must first divulge information before job space, it is qualified to oxygen, toxic and harmful gas, the detected value of flammable explosive gas in the confined space
After be allowed for access its inside processing.Ventilation includes gravity-flow ventilation and force ventilation two ways, gravity-flow ventilation be conducive to wind pressure or
(and) temperature difference causes the hot pressing function of density contrast, so that inner air and outer air circulation cycle, achievees the purpose that ventilation, it is a kind of warp
It helps practical draft type.It is provided in Beijing's provincial standard, the confined space should be opened into (outlet) before entering the confined space
Gravity-flow ventilation is carried out, is then detected.In practice, due to lacking effective technical support, live gravity-flow ventilation has one
Fixed blindness, this not only leverages working efficiency, and also the arrangement to later point position of divulging information brings certain tired
It is difficult.
The single radial cut confined space is due to only one inlet and outlet, in gravity-flow ventilation, distinguished and admirable inlet and outlet all in the section,
Relative to the confined space with multiple inlet and outlet, gravity-flow ventilation is increasingly complex, and influence factor is more.Its effect of natural ventilation
With gas component and concentration etc. in extraneous meteorologic parameter, the confined space because being known as much relations.Currently, confined space gravity-flow ventilation
Correlative study is less, and due to lacking effective technical support, actual field gravity-flow ventilation has certain blindness, this is not only big
Working efficiency is affected greatly, certain hidden danger is also brought to operation safety.
Summary of the invention
The purpose of the utility model is to provide a kind of gravity-flow ventilations to influence gas component distribution in the single radial cut confined space
Test device, which, which can measure gravity-flow ventilation wind speed, influences gas component distribution in the single radial cut confined space.
A kind of gravity-flow ventilation influences test device, including gravity-flow ventilation mould to gas component distribution in the single radial cut confined space
Quasi- system, single radial cut confined space simulation system, the simulation of confined space gaseous environment and data acquisition control system；It is described from
Right Ventilation simulation system includes exhaust fan, the pipeline that section is rectangle, is separated and is divided into up and down by steel plate in the middle part of rectangular duct
Two parts；Pipeline top half is draft chamber, and for simulating extraneous natural ventilating environment, two sides are open, and side is opened wherein
Other two rows up and down of mouth arrange that 6 exhaust fans, every row are evenly arranged 3 exhaust fans altogether；Lower half portion simulation underground, two
Side is all closed；The single radial cut confined space simulation system includes well lid, inspection shaft and inspection chamber, and inspection shaft is circle, position
In rectangular duct middle steel plate lower part, and there is well head at steel plate, and is furnished with well lid, well head and well lid pass through flanged joint,
Inspection shaft lower part is connect with rectangle inspection chamber；The gaseous environment simulation and data acquisition control system include gas cylinder, electromagnetism
Valve, vacuum pump, industrial personal computer, data collecting card, wind speed air flow sensor, oxygen concentration sensor, nitrogen gas concn sensor, dioxy
Change concentration of carbon sensor, gas pressure sensor, data collecting card connect with sensor, acquire wind speed, air quantity, gas concentration,
Pressure data, data acquisition control system control solenoid valve is vacuumized and distribution.
The gas cylinder includes compressed oxygen gas cylinder, nitrogen gas cylinder, dioxide bottle.
The wind speed air flow sensor is mounted on inside rectangular duct close to exhaust fan side；The oxygen is dense
Degree sensor, nitrogen gas concn sensor, gas concentration lwevel sensor are mounted in inspection chamber.
Detailed description of the invention
Fig. 1 is that a kind of gravity-flow ventilation provided by the utility model influences gas component distribution in the single radial cut confined space
Test device schematic diagram.
Fig. 2 is main body device left view.
Fig. 3 is A-A drawing in side sectional elevation in main body device.
Specific embodiment
Below with reference to the attached drawing of the utility model, the technical scheme in the embodiment of the utility model is carried out clear, complete
Ground description, it is clear that the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Base
It is obtained by those of ordinary skill in the art without making creative efforts all in the embodiments of the present invention
Other embodiments belong to the protection scope of the utility model.
It is provided as shown in Figure 1 by the utility model for realizing gravity-flow ventilation to gas component in the single radial cut confined space
Distribution influence test device schematic diagram, described device include gravity-flow ventilation simulation system, single radial cut confined space simulation system,
The simulation of confined space gaseous environment and data acquisition control system；The gravity-flow ventilation simulation system include exhaust fan,
Section is the pipeline of rectangle, is separated and is divide into upper part and lower part by steel plate in the middle part of rectangular duct；Pipeline top half is draft chamber, is used
Extraneous natural ventilating environment is simulated, two sides are open, and two rows arrange 6 pull-out type wind altogether up and down by a side opening wherein
Machine, every row are evenly arranged 3 exhaust fans, and arrangement is as shown in Figure 2；Underground is simulated in lower half portion, and two sides are all closed；It is described
Single radial cut confined space simulation system include well lid, inspection shaft and inspection chamber, inspection shaft is circle, is located among rectangular duct
Lower part of steel plate, and have well head at steel plate, and be furnished with well lid, well head and well lid pass through flanged joint, inspection shaft lower part and square
The connection of shape inspection chamber, structure are as shown in Figure 3；The gaseous environment simulation and data acquisition control system include gas cylinder, electricity
Magnet valve, vacuum pump, industrial personal computer, data collecting card, wind speed air flow sensor, oxygen concentration sensor, nitrogen gas concn sensor, two
Carbonoxide concentration sensor, gas pressure sensor, data collecting card are connect with sensor, and acquisition wind speed, air quantity, gas are dense
Degree, pressure data, data acquisition control system control solenoid valve is vacuumized and distribution.
The gas cylinder includes compressed oxygen gas cylinder, nitrogen gas cylinder, dioxide bottle.
The wind speed air flow sensor is mounted on inside rectangular duct close to exhaust fan side；The oxygen is dense
Degree sensor, nitrogen gas concn sensor, gas concentration lwevel sensor are mounted in inspection chamber.
When specific test experiments, vacuum pump and solenoid valve are opened by data acquisition control system first, then pass through control
Device starting vacuum pump is vacuumized, and when vacuum degree reaches preset value, closes solenoid valve and vacuum pump.Next, starting
Give confined space distribution, when distribution sets every kind of gas ratio, is automatically controlled by control system and completes distribution.Pumping is opened simultaneously
Formula blower carries out simulating extraneous gravity-flow ventilation out, the wind speed for number and the position change ventilation opened by adjusting exhaust fan
And air quantity.Next, starting to test, manhole cover is opened, when data acquisition control system collects and records gravity-flow ventilation difference
Between when the confined space in every kind of gas situation of change, until experiment terminate.After experiment, each system is closed.
Specific experiment method and steps is as follows:
(1) ensure that manhole cover is closed, the single radial cut confined space is vacuumized and distribution；
(2) different exhaust fans are manually opened, wind speed and air quantity are adjusted；
(3) well lid is opened manually；
(4) gas with various component changes with time inside the data acquisition control system acquisition confined space.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should
Subject to the scope of protection of the claims.
Claims (2)
1. gravity-flow ventilation influences test device to gas component distribution in the single radial cut confined space, which is characterized in that including nature
Ventilation simulation system, single radial cut confined space simulation system, the simulation of confined space gaseous environment and data acquisition control system；Institute
The gravity-flow ventilation simulation system stated includes the pipeline that exhaust fan and section are rectangle, is separated point in the middle part of rectangular duct by steel plate
For upper and lower two parts；Pipeline top half is draft chamber, simulates extraneous natural ventilating environment, and two sides are open, wherein side
Other two rows up and down of opening arrange that 6 exhaust fans, every row are evenly arranged 3 exhaust fans altogether；Underground is simulated in lower half portion,
Two sides are all closed；The single radial cut confined space simulation system includes well lid, inspection shaft and inspection chamber, and inspection shaft is circle,
Positioned at rectangular duct middle steel plate lower part, and there is well head at steel plate, and is furnished with well lid, well head and well lid and is connected by flange
It connects, inspection shaft lower part is connect with rectangle inspection chamber；The gaseous environment simulation and data acquisition control system include gas cylinder, electricity
Magnet valve, vacuum pump, industrial personal computer, data collecting card, wind speed air flow sensor, oxygen concentration sensor, nitrogen gas concn sensor, two
Carbonoxide concentration sensor, gas pressure sensor, data collecting card are connect with sensor, acquire wind speed, air quantity, gas concentration
And pressure data, data acquisition control system control solenoid valve is vacuumized and distribution.
2. gravity-flow ventilation according to claim 1 influences test device to gas component distribution in the single radial cut confined space,
It is characterized in that, the gas cylinder includes compressed oxygen gas cylinder, nitrogen gas cylinder, dioxide bottle；The wind speed air quantity passes
Sensor is mounted on inside draft chamber close to exhaust fan side；The oxygen concentration sensor, nitrogen gas concn sensor, two
Carbonoxide concentration sensor is mounted in inspection chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821998326.8U CN209589962U (en) | 2018-11-30 | 2018-11-30 | Gravity-flow ventilation influences test device to gas component distribution in the single radial cut confined space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821998326.8U CN209589962U (en) | 2018-11-30 | 2018-11-30 | Gravity-flow ventilation influences test device to gas component distribution in the single radial cut confined space |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209589962U true CN209589962U (en) | 2019-11-05 |
Family
ID=68348212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821998326.8U Expired - Fee Related CN209589962U (en) | 2018-11-30 | 2018-11-30 | Gravity-flow ventilation influences test device to gas component distribution in the single radial cut confined space |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209589962U (en) |
-
2018
- 2018-11-30 CN CN201821998326.8U patent/CN209589962U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191105 Termination date: 20201130 |