CN207866795U - A kind of compressed-air foam compressed coefficient test device - Google Patents
A kind of compressed-air foam compressed coefficient test device Download PDFInfo
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- CN207866795U CN207866795U CN201820275759.4U CN201820275759U CN207866795U CN 207866795 U CN207866795 U CN 207866795U CN 201820275759 U CN201820275759 U CN 201820275759U CN 207866795 U CN207866795 U CN 207866795U
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Abstract
The utility model is related to a kind of compressed-air foam compressed coefficient test devices, screw lift includes lead screw and turbine box, tooth engagement in turbine in one end and turbine box of lead screw, inlet valve is installed in chamber bottom surface, safety relief valve is installed on the outer wall of chamber upper end, the other end of screw lift lead screw is arranged in chamber by chamber cover and is mutually fixed with piston, sealing ring is arranged on piston and is close to chamber inner wall, it is equipped with pressure sensor in the upper surface of piston, foam is equipped in the chamber below piston, servo motor is connect with planetary reduction gear, the screw rod of planetary reduction gear and the outer tooth engagement of turbine in screw lift turbine box, servo motor rotates clockwise or counterclockwise, band piston can move up and down in chamber.This test device can accurately and conveniently obtain the coefficient of bulk compressibility of foam under certain temperature, provide parameter foundation for its fluid dynamics research in pipeline, meet foam characteristic demand, easy to operate.
Description
Technical field
It is to be used for compressed-air foam performance the utility model is related to a kind of compressed-air foam compressed coefficient test device
The device of parameter testing.
Background technology
Compressed air foam extinguishing technology is a kind of fire-fighting technique that positive-pressure type generates foam and conveyed in pipeline, with
Conventional foam fire-fighting technique is compared, and is had the characteristics that foaming structure exquisiteness, size uniform, stability higher, can be covered for a long time
The surface for covering, being deposited in protected object, to greatly improve the fire extinguishing protective benefits of fire extinguishing system.
Fixed compressed air foam fire-extinguishing system pipeline is the fire foam fully to have foamed, this feature
So that the engineer application of this technology is had a clear superiority, but due to compressed-air foam simultaneously have both non-Newtonianism with it is compressible
Property, it is different from water or other simple fluids, is the important technology hardly possible faced at present in the fluid dynamics research of pipeline
One of point, and the compressed coefficient of foam is an important mechanics parameter during fluid calculation.
The compressed coefficient is under certain temperature, when pressure increases a unit, the relative increase rate of fluid density.It is steeping at present
In the hydrodynamics method research of foam, mostly using theoretical model computational methods greatly, this parameter is set to the compressed coefficient, and
Fire-fighting foams type is more and each foam formulation is different, and different foams has different compressibility energy, theoretical calculation
The obtained compressed coefficient has certain error, and experimental method is needed to test.Currently, through retrieval, the compression of test compression air foam
There is not been reported for the device and method of coefficient.
There is dependence test device to can be used as reference in downhole instrument test device, it is the most similar to be in similar device
Hydraulic oil volume compression coefficient test device, but the physical property difference of foam and hydraulic oil is very big, therefore it wants test device
Ask different.Compressed-air foam has analysis liquid characteristic at any time and different types of drainage time is different, it is desirable that when compression
Between it is shorter and adjustable, and hydraulic oil volume compression coefficient test device is manual operation, and test process needs the long period, not
Compressed-air foam test request can be met.The mobility of foam is poor, needs by upward filled and process, feed inlet below equipment
It needs to be arranged below equipment；Pressure of the compressed-air foam in pipeline is generally within 1MPa, test device compression
Required pressure ratio hydraulic oil volume compression coefficient test device requires low, it is only necessary within 2MPa.
Invention content
Situation in view of the prior art and existing deficiency, the utility model provide a kind of compressed-air foam compression system
Number test device, the device meet foam characteristic demand, can accurately and conveniently obtain the volume compression of foam under certain temperature
Coefficient provides parameter foundation for its fluid dynamics research in pipeline.
To achieve the above object, used technical solution is the utility model：A kind of compressed-air foam compressed coefficient
Test device, including chamber, servo motor, touch control screen, pressure sensor, piston, inlet valve, planetary reduction gear, safety
Pressure-relief valve, screw lift, sealing ring, foam, the screw lift include lead screw and turbine box, one end of lead screw and turbine
Tooth engagement in turbine in case, it is characterised in that：The chamber is tubular, inlet valve is equipped in chamber bottom surface, on chamber
Safety relief valve is installed, the other end of the screw lift lead screw is arranged in chamber simultaneously by chamber cover on the outer wall at end
It is mutually fixed with piston, the sealing ring is arranged on piston and is close to chamber inner wall, and pressure sensor is equipped in the upper surface of piston,
Foam is equipped in the chamber below piston, the servo motor is connect with planetary reduction gear, the screw rod and silk of planetary reduction gear
The outer tooth engagement of turbine in bar elevator turbine box, servo motor rotate clockwise or counterclockwise, and pass through planetary reduction gear screw rod
With the cooperation of turbine external tooth and the cooperation of turbine internal tooth and lead screw, band piston can move up and down in chamber；
Circuit is connected as：Touch control screen is connect with servo motor and pressure sensor respectively.
The utility model has following characteristics：
Test device feed inlet is arranged in chamber bottom, and bubble mobility is poor, and cavity can have been prevented by lower section charging.
Piston is equipped with pressure sensor, can the indoor pressure of precision real time measuring chamber.
Piston and cavity inner wall face are high temperature resistant, corrosion-resistant using the sealing of fluorine glue sealing ring.
Piston is driven by servo motor and is moved with certain speed, and speed is adjustable.
It records in real time and preserves cavity indoor pressure and volumetric quantities.
Volume or upper pressure limit can be set, and when more than setting value, equipment is automatically stopped and shows alarm.
Using the compressed-air foam compressed coefficient test device of the utility model, a constant temperature can be accurately and conveniently obtained
The coefficient of bulk compressibility of the lower foam of degree provides parameter foundation for its fluid dynamics research in pipeline, meets foam spy
Property demand, it is easy to operate.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Specific implementation mode
As shown in Figure 1, a kind of compressed-air foam compressed coefficient test device, including chamber 1, servo motor 2, touch control
System screen 3, pressure sensor 4, piston 5, inlet valve 6, planetary reduction gear 7, safety relief valve 8, screw lift 9, sealing ring 10,
Foam 11.
Screw lift 9 includes lead screw 9-1 and turbine box 9-2, one end of lead screw 9-1 in the turbine in turbine box 9-2
Tooth engagement.
Chamber 1 is tubular, and inlet valve 6 is equipped in 1 bottom surface of chamber, and safety is equipped on the outer wall of 1 upper end of chamber and is unloaded
The other end of pressure valve 8,9 lead screw 9-1 of screw lift is fixed by chamber cover 1-1 settings in chamber 1 and with 5 phase of piston, close
Seal 10 is arranged on piston 5 and is close to 1 inner wall of chamber, pressure sensor 4 is equipped in the upper surface of piston 5, below piston 5
Foam 11 is equipped in chamber, servo motor 2 is connect with planetary reduction gear 7, screw rod and 9 whirlpool of screw lift of planetary reduction gear 7
The outer tooth engagement of turbine in roller box 9-2, servo motor 2 rotate clockwise or counterclockwise, and pass through 7 screw rod of planetary reduction gear and turbine
External tooth coordinates and the cooperation of turbine internal tooth and lead screw 9-1, and band piston 5 can move up and down in chamber 1.
Circuit is connected as：Touch control screen 3 is connect with servo motor 2 and pressure sensor 4 respectively.
The material of chamber 1 is 316L stainless steels, is used for filled and process.
Sealing ring 10 is fluorine glue sealing ring.
Screw lift 9 can be with piston compression foam volume.
Electric control system includes mainly that servo motor 2 is used for controlled motion stroke with planetary reduction gear 7, makes fixing fabric structure
Precisely.
The pressure system that pressure sensor 4, the pressure alarm in touch control screen 3 and safety relief valve 8 form is surveyed in real time
The pressure of different volumes foam is tried, touch control screen 3 corresponds to corresponding volume data according to different location, the corresponding pressure of acquisition in real time
Power automatically saves volume and pressure data, while can export excel list datas.
The operation principle of compressed-air foam compressed coefficient test device：
After device power booting, bottom inlet valve 6 is opened, lifting height and the rate of climb are inputted in touch control screen 3,
" rising " item on point touching control flow 3, servo motor 2 coordinate planetary reduction gear 1 to control screw lift 9, make on piston 5
It rises, rises to designated position, servo motor 2 is automatically stopped action.
After piston 5 lifts, the foam 11 of certain mass is loaded by bottom inlet valve 6.
Inlet valve 6 to be closed, 5 decrease speed of piston is set in touch interface 3, is clicked " decline ", servo motor 2 starts,
Coordinate planetary reduction gear 7 to control screw lift 9, piston 5 is made to decline, carry out foam volume compression, reaches and change inside chamber 1
The purpose of volume and pressure.
The rotating speed that servo motor 2 can be controlled to adjust by touch control screen 3 can to change the point-to-point speed of piston 5
The final volume that need to be compressed is set on the touch screen 3, may also set up the pressure that need to finally reach, touch control screen 3 passes through pressure
Sensor 4 can read pressure in chamber 1 in real time, and touch control screen 3 can automatically be calculated from tape program by the decrease speed of piston 5
Foam volume feeds back to touch control screen 3, and while reaching setting value by 3 control servomotor 2 of touch control screen is automatically stopped down
Drop also can click " stopping ", manual arrestment on the touch screen 3 halfway.
Volume and pressure data are automatically saved by touch control screen 3, foam compression coefficient is calculated by following formula.
Wherein,For the compressed coefficient；For foam density, can be calculated with the volume measured by the quality of filled and process；P is
Pressure is measured by the present apparatus；T is temperature.
The input limitation pressure in touch control screen 3, when pressure is more than setting value in equipment, meeting in touch control screen 3
There is alarm, and control and stop servo motor 2, when pressure is more than 3MPa in equipment, safety relief valve 8, which automatically opens, to be let out
Pressure ensures safety.
Claims (3)
1. a kind of compressed-air foam compressed coefficient test device, including chamber（1）, servo motor（2）, touch control screen（3）、
Pressure sensor（4）, piston（5）, inlet valve（6）, planetary reduction gear（7）, safety relief valve（8）, screw lift（9）, it is close
Seal（10）, foam（11）, the screw lift（9）Including lead screw（9-1）And turbine box（9-2）, lead screw（9-1）One end
With turbine box（9-2）Tooth engagement in interior turbine, it is characterised in that：The chamber（1）For tubular, in chamber（1）It installs bottom surface
There is inlet valve（6）, in chamber（1）Safety relief valve is installed on the outer wall of upper end（8）, the screw lift（9）Lead screw（9-
1）The other end pass through chamber cover（1-1）It is arranged in chamber（1）Interior and and piston（5）It is mutually fixed, the sealing ring（10）Setting
In piston（5）It goes up and is close to chamber（1）Inner wall, in piston（5）The upper surface of be equipped with pressure sensor（4）, in piston（5）Following
Foam is equipped in chamber（11）, the servo motor（2）With planetary reduction gear（7）Connection, planetary reduction gear（7）Screw rod and silk
Bar elevator（9）Turbine box（9-2）The outer tooth engagement of interior turbine, servo motor（2）It rotates clockwise or counterclockwise, passes through planet
Retarder（7）Screw rod and the cooperation of turbine external tooth and turbine internal tooth and lead screw（9-1）Cooperation, band piston（5）In chamber（1）It is interior
It can move up and down；
Circuit is connected as：Touch control screen（3）Respectively with servo motor（2）And pressure sensor（4）Connection.
2. a kind of compressed-air foam compressed coefficient test device according to claim 1, it is characterised in that：The chamber
（1）Material be 316L stainless steels.
3. a kind of compressed-air foam compressed coefficient test device according to claim 1, it is characterised in that：The sealing
Circle（10）For fluorine glue sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820275759.4U CN207866795U (en) | 2018-02-26 | 2018-02-26 | A kind of compressed-air foam compressed coefficient test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820275759.4U CN207866795U (en) | 2018-02-26 | 2018-02-26 | A kind of compressed-air foam compressed coefficient test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207866795U true CN207866795U (en) | 2018-09-14 |
Family
ID=63455664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820275759.4U Active CN207866795U (en) | 2018-02-26 | 2018-02-26 | A kind of compressed-air foam compressed coefficient test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207866795U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624090A (en) * | 2018-12-17 | 2019-04-16 | 重庆三峡学院 | A kind of compass laboratory foam precisely adds device and application method |
| CN110044686A (en) * | 2019-04-29 | 2019-07-23 | 合肥工业大学 | A kind of portable triaxial stress strain detection testing device loaded using counter-force |
-
2018
- 2018-02-26 CN CN201820275759.4U patent/CN207866795U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624090A (en) * | 2018-12-17 | 2019-04-16 | 重庆三峡学院 | A kind of compass laboratory foam precisely adds device and application method |
| CN109624090B (en) * | 2018-12-17 | 2023-10-27 | 重庆三峡学院 | Precise foam adulterant for compass type laboratory and use method |
| CN110044686A (en) * | 2019-04-29 | 2019-07-23 | 合肥工业大学 | A kind of portable triaxial stress strain detection testing device loaded using counter-force |
| CN110044686B (en) * | 2019-04-29 | 2020-12-08 | 合肥工业大学 | Portable triaxial stress-strain testing device loaded by counter-force |
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| GR01 | Patent grant | ||
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Address after: 300381 Nankai District Jin Wei South Road, No. 110, Tianjin Patentee after: Tianjin Institute of Fire Protection, Ministry of Emergency Management Address before: 300381 Nankai District Jin Wei South Road, No. 110, Tianjin Patentee before: Tianjin Fire Fighting Inst., Ministry of Public Security |