CN206945472U - A kind of gas minute-pressure difference generator - Google Patents
A kind of gas minute-pressure difference generator Download PDFInfo
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- CN206945472U CN206945472U CN201720436062.6U CN201720436062U CN206945472U CN 206945472 U CN206945472 U CN 206945472U CN 201720436062 U CN201720436062 U CN 201720436062U CN 206945472 U CN206945472 U CN 206945472U
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- gas
- minute
- pressure difference
- pressure
- difference generator
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Abstract
The utility model discloses a kind of gas minute-pressure difference generator,Including minute-pressure difference generator body,It is a column,Its middle part sets hole,The port in hole is the hickey for installing electric heater,U-shaped airflow hole is set on minute-pressure difference generator body,The a port of U-shaped airflow hole is the air inlet of threaded connection,The first heatproof pneumatic filter is set in air inlet,Another port of U-shaped airflow hole is the gas outlet of threaded connection,The bottom of U-shaped airflow hole sets the second heatproof pneumatic filter,The part of the second heatproof pneumatic filter to connection air inlet in U-shaped airflow hole is gas thermostatic device,Gas thermostatic device is the metal ball composition of the high Porous hollow of thermal conductivity factor,The second heatproof pneumatic filter in U-shaped airflow hole is the gas differential pressure generator formed with metal capillary beam to the part of connection gas outlet,The both ends of gas differential pressure generator respectively set a pressure sensor；Temperature sensor is set on minute-pressure difference generator body, outside sets heat insulation layer, is outside protective covers outside heat insulation layer.
Description
Technical field
The utility model belongs to fire-fighting fire extinguishing equipment technical field, and in particular to a kind of gas minute-pressure difference generator.
Background technology
Gas extinguishing agent carries out needing to measure agent concentration value in fire extinguishing procedure, and prior art is to use gas sampling side
Method carries out carrying out constituent analysis to gas again after, it is necessary to carry out sample gas filtration drying processing, and measurement accuracy is relatively low, in real time
Property it is poor, to some have air blast flow occasions be difficult to measure.
Utility model content
The purpose of this utility model is：The present invention is using the higher metal material of thermal conductivity coefficient so that and overall heat transfer is fast,
Temperature field needed for easily quick realization, gas thermostatic device is formed using the metal ball of the high Porous hollow of thermal conductivity factor so that pass through
Gas temperature therein quickly reaches the temperature of overall generator, use metal capillary beam form gas differential pressure generator with
The Laminar Flow needed for measurement is realized, is realized using the method for electrical heating and temperature sensor collecting temperature to overall generator temperature
Effective control of degree, forming heat insulation layer using ceramic fiber blanket can realize that overall generator temperature is constant.These technologies are adopted
With, realize constant temperature laminar flow flow fields environment, for application Poiseuille's law obtain flow field in gas composition concentration be possibly realized.
The technical solution adopted in the utility model is：A kind of gas minute-pressure difference generator, the gas minute-pressure difference generator bag
Minute-pressure difference generator body is included, minute-pressure difference generator body is a column, is made up of the higher metal material of material thermal conductivity coefficient, micro-
Set hole in the middle part of differential pressure generator body, the port in hole is the hickey for installing electric heater, on minute-pressure difference generator body
U-shaped airflow hole is set, and a port of U-shaped airflow hole is the air inlet of threaded connection, and the first heatproof gas mistake is set in air inlet
Filter, another port of U shape airflow holes is the gas outlet of threaded connection, and the bottom of U-shaped airflow hole sets the second heatproof gas mistake
Filter, the part of the second heatproof pneumatic filter to connection air inlet in U shape airflow holes are gas thermostatic device, gas thermostatic
Device is the metal ball composition of the high Porous hollow of thermal conductivity factor, and the second heatproof pneumatic filter in U-shaped airflow hole is to connecting out
The part of gas port is the gas differential pressure generator formed with metal capillary beam, and gas differential pressure generator is provided at both ends with pressure
Sensor and pressure sensor；Temperature sensor is set on minute-pressure difference generator body, outside sets heat insulation layer, is to protect outside heat insulation layer
Protect outer cover.
It gives the heating of minute-pressure difference generator body in use, electric heater switches on power, and temperature sensor will monitor that temperature arrives
During design temperature, electric heater is in keeping warm mode, whole minute-pressure difference generator body is in the temperature constant state of setting；Gas to be measured
Body enters from air inlet, and by thermostat after filter filters off dust, the gas exported from thermostat is sent out with micro-pressure-difference
Raw body has the gas of same steady temperature, and the entrance of differential pressure generator is reached by filter, and gas occurs through overpressure difference
Discharged after device from gas outlet, gas is obtained by pressure before and after differential pressure generator, warp by pressure sensor and pressure sensor
The pressure difference that appropriate calculating obtains gas is crossed, the constituents ratio value of gas is calculated by Poiseuille's law model.
Principle of the present utility model is：
According to Poiseuille's law：Viscosity is μ fluid, the capillary that radius is R, length is L is flowed through, if flowing through capillary
The pressure drop at both ends is Δ p, flow Q afterwards.In the case where flow pattern is laminar flow, according to Poiseuille's law, there is following relation：
That is, in the case where other conditions are constant, the pressure drop Δ p at capillary both ends, simply fluid viscosity μ function.No
The viscosity of same type fluid is different, and the pressure drop at capillary both ends must differ.And it is possible to this parameter of pressure drop is used, quantitative table
Levy the viscosity size of different fluid.By (1) Shi Ke get：
μ=k Δs p (2)
Wherein, k is instrument parameter, is determined in itself by the measurement apparatus actually used.
The viscosity of low pressure mixture can be calculated using following empirical equation：
In formula, μmixFor the viscosity of mixed gas；yjFor the molar fraction of i components in mixed gas；μiFor i in mixed gas
The viscosity of component；MiFor the molecular weight of i components in mixed gas.
Above theory is occupy, the utility model proposes a kind of gas minute-pressure difference generator.When sample gas passes through the device
When, gas micro-pressure-difference can be produced.
The utility model compared with prior art the advantages of be：
(1) gas minute-pressure difference generator is a kind of measurement apparatus for obtaining gas flow differential pressure, can be suitably used for including Dan Shuan
Most gas concentration measurements of component.
(2) this gas minute-pressure difference generator uses constant temperature technology and bundle of capillary tubes technology, and constant temperature ring is in gas flowing
During border and laminar flow, acquired gas stream dynamic pressure difference data meets the requirement of Poiseuille's law, so as to for surveying
The concentration data of gas testing body.This gas minute-pressure difference generator provides a method that for the test of flowing gas concentration, is particularly
An effective and feasible solution is provided to flow the measurement of place gas extinguishing agent concentration.
(3) this gas minute-pressure difference generator forms gas thermostatic device using the metal ball of the high Porous hollow of thermal conductivity factor,
So that quickly reaching the temperature of overall generator by gas temperature therein, gather and control using electrical heating and temperature sensor
The method of temperature processed realizes effective control to overall generator temperature, can be realized using ceramic fiber blanket composition heat insulation layer whole
Body generator temperature is constant, the use of these technologies, realizes constant temperature laminar flow flow fields environment.
Brief description of the drawings
Fig. 1 is a kind of gas minute-pressure difference generator view of the utility model；
Fig. 2 is to add heat-insulation layer gas minute-pressure difference generator schematic diagram；
Fig. 3 is single channel gas minute-pressure difference generator right side view；
Fig. 4 is two channel gas minute-pressure difference generator right side views.
Reference implication is in figure：1 is gas minute-pressure difference generator body, and 2 be U-shaped airflow hole, and 3 be hole, and 4 be electrical heating
Device, 5 be gas thermostatic device, and 6 be heat insulation layer, and 7 be outer cover, and 8 be air inlet, and 9 be gas outlet, and 10 be M14 screwed hole interfaces, and 11 are
Gas pressure sensor, 12 be pressure sensor, and 13 be temperature sensor, and 14 be the first heatproof pneumatic filter, and 15 be gas
Differential pressure generator, 16 be the first heatproof pneumatic filter, and 17 be that air inlet 17,18 is exhaust outlet.
Embodiment
Embodiment of the present utility model is illustrated below in conjunction with accompanying drawing.
Embodiment 1：
As shown in Figure 1, Figure 2 and Figure 3, a kind of gas minute-pressure difference generator of the utility model, gas minute-pressure difference generator body 1
It is the column of a copper material, its length is 300mm, is highly 100mm, width 60mm, gas minute-pressure difference generator body 1
Middle part sets diameter 40mm, deep 220mm hole 3, and the port in hole 3 is M14 internal thread holes interface 10, for installing M14 external screw threads electricity
Heater 4, a diameter of 15mm is set on gas minute-pressure difference generator body 1, deep 220mm U shapes airflow hole 2, U-shaped airflow hole 2 is straight
Footpath is 15mm, a length of 60mm in bottom, and an internal thread for M10 of U-shaped airflow hole 2 connects air inlet 8, and length is set in air inlet 8
10mm diameters 15mm the first heatproof pneumatic filter 14, another port of U-shaped airflow hole 2 are M10 screwed hole gas outlet
9, the air inlet pipe of external aspiration pump, the bottom of U-shaped airflow hole 2 sets a length of 60mm, a diameter of the second heatproofs of 15mm pneumatic filter
16, the part of the second heatproof pneumatic filter 16 to connection air inlet 8 in U-shaped airflow hole 2 be gas thermostatic device 5, gas perseverance
Warm device 5 forms for the copper metal ball of diameter 8mm Porous hollows, by diameter 2.5mm × wall thickness 0.3mm 304 Stainless Steel Capillaries
Effective temperature resistant adhesive is linked to be beam, the second heatproof pneumatic filter 16 in U-shaped airflow hole 2 to connection gas outlet 9 it
Between be used as gas differential pressure generator 15, the both ends of gas differential pressure generator 15 install model HPX005GD gas pressure sensors
11 and pressure sensor 12；Temperature sensor 13 is set on gas minute-pressure difference generator body 1 as K-type M3 paster thermocouples, thermocouple
Output is linked to the temperature of model WHD temperature controller control electric heater, and outside heat insulation layer 6 is thick using 3mm
The ceramic fiber blanket of heatproof is formed and sealed, and the outer cover 7 outside heat insulation layer 6 is made by the thick stainless steel plates of 1mm.Thus
Micro-pressure-difference gas concentration measurement device is all the way made.
Each part junction is smeared with fluid sealant during assembling, with anti-leak.With a clip by the gas minute-pressure difference generator
It is fixed on the bottom plate of test box.
The air inlet pipe with external screw thread M10 is fixedly connected with internal thread hole air inlet 8 during use, the outer of aspiration pump will be connect
Screw thread M10 air inlet pipe is fixedly connected with internal thread hole gas outlet 9, and can enters gas to be tested from hole when opening aspiration pump
Gas port 8 enters in gas minute-pressure difference generator, is discharged from gas outlet 9 through aspiration pump；Gas to be tested enters minute-pressure difference generator
In, when passing through bundle of capillary tubes after overanxious and constant temperature, after micropressure sensor measures the pressure at bundle of capillary tubes both ends and is transferred to
Continuous record analysis handles to obtain the concentration value measurement of gas componant.
The gas minute-pressure difference generator can be used for CO, CO2, N2, the concentration value of the grade gas of extinguishing chemical 1301,1211.
Embodiment 2：
The present embodiment 2 is on the basis of embodiment 1, adds micro-pressure-difference gas concentration measurement all the way.Gas micro-pressure-difference
The column that body 1 is still a copper material occurs, its length is 300mm, is highly 100mm, wide to move as 100mm.
As shown in Figure 1, Figure 2 and Figure 4, the middle part that body 1 occurs sets diameter 40mm, deep 200mm hole 3, and the port in hole 3 is
M14 screwed holes interface 10, for installing electric heater 4, setting on body 1 occurs two a diameter of 15mm are arranged side by side, it is deep
22cm looping pit, there are air inlet 8 and air inlet 17, exhaust outlet 9 and exhaust outlet 18 respectively.As shown in Fig. 3, air inlet 8 and row
The U-shaped airflow hole that the U-shaped airflow hole that gas port 9 is formed, air inlet 17 and intake and exhaust ports 18 are formed, two U-shaped air-flows side by side
Pore structure and arrangement are identical, the air inlet of aspiration pump, two U-shaped airflow holes will be accessed after the exhaust outlet connection of two U-shaped airflow holes
Air inlet connect two-way air intake respectively, thus constitute the micro-pressure-difference gas concentration measurement device of a two paths.
Claims (2)
- A kind of 1. gas minute-pressure difference generator, it is characterised in that：The gas minute-pressure difference generator includes minute-pressure difference generator body (1), minute-pressure difference generator body (1) is a column, is made up of the higher metal material of material thermal conductivity coefficient, minute-pressure difference generator Hole (3) is set in the middle part of body (1), the port of hole (3) is the hickey (10) for installing electric heater (4), and micro-pressure-difference occurs U-shaped airflow hole (2) is set on body (1), and a port of U-shaped airflow hole (2) is the air inlet (8) of threaded connection, air inlet (8) the first heatproof pneumatic filter (14) is set in, another port of U-shaped airflow hole (2) is the gas outlet (9) of threaded connection, U The bottom of shape airflow hole (2) sets the second heatproof pneumatic filter (14), the second heatproof pneumatic filter in U-shaped airflow hole (2) (16) it is gas thermostatic device (5) to the part of connection air inlet (8), gas thermostatic device (5) is the high Porous hollow of thermal conductivity factor Metal ball composition, the second heatproof pneumatic filter (16) in U-shaped airflow hole (2) is to the part of connection gas outlet (9) to use The gas differential pressure generator (15) that metal capillary beam is formed, gas differential pressure generator (15) are provided at both ends with pressure sensor And pressure sensor (12) (11)；Temperature sensor (13) is set on minute-pressure difference generator body (1), outside sets heat insulation layer (6), absolutely It is outside protective covers (7) that thermosphere (6) is outside.
- A kind of 2. gas minute-pressure difference generator according to claim 1, it is characterised in that：In use, electric heater (4) connects Energization source, heated to minute-pressure difference generator body (1), when temperature sensor (13) will monitor temperature to design temperature, electric heater (4) keeping warm mode is in, whole minute-pressure difference generator body (1) is in the temperature constant state of setting；Under test gas is from air inlet (8) Into by thermostat (5) after filter (14) filters off dust, the gas of output is sent out with micro-pressure-difference from thermostat (5) Raw body (1) has the gas of same steady temperature, and the entrance of differential pressure generator (15), gas warp are reached by filter (16) Discharged after over-pressed difference generator (15) from gas outlet (9), gas is obtained by pressure sensor (11) and pressure sensor (12) By pressure before and after differential pressure generator (15), the pressure difference of gas is obtained by appropriate calculating, is calculated by Poiseuille's law model The constituents ratio value of gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720436062.6U CN206945472U (en) | 2017-04-24 | 2017-04-24 | A kind of gas minute-pressure difference generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720436062.6U CN206945472U (en) | 2017-04-24 | 2017-04-24 | A kind of gas minute-pressure difference generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206945472U true CN206945472U (en) | 2018-01-30 |
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ID=61358698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720436062.6U Withdrawn - After Issue CN206945472U (en) | 2017-04-24 | 2017-04-24 | A kind of gas minute-pressure difference generator |
Country Status (1)
| Country | Link |
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| CN (1) | CN206945472U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121355A (en) * | 2017-04-24 | 2017-09-01 | 中国科学技术大学 | A kind of gas minute-pressure difference generator |
-
2017
- 2017-04-24 CN CN201720436062.6U patent/CN206945472U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121355A (en) * | 2017-04-24 | 2017-09-01 | 中国科学技术大学 | A kind of gas minute-pressure difference generator |
| CN107121355B (en) * | 2017-04-24 | 2023-04-25 | 中国科学技术大学 | Gas micro-pressure difference generator |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180130 Effective date of abandoning: 20230425 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180130 Effective date of abandoning: 20230425 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |