CN111948343A - Device for measuring foam stability - Google Patents

Device for measuring foam stability Download PDF

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Publication number
CN111948343A
CN111948343A CN202010773650.5A CN202010773650A CN111948343A CN 111948343 A CN111948343 A CN 111948343A CN 202010773650 A CN202010773650 A CN 202010773650A CN 111948343 A CN111948343 A CN 111948343A
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CN
China
Prior art keywords
ball valve
foam
trachea
flow meter
mass flow
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Pending
Application number
CN202010773650.5A
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Chinese (zh)
Inventor
陈晟
陈庆
郑宗强
魏旭
邓洁清
蔚超
郭王勇
鞠振福
吴刘锁
陈�光
罗剑飞
申翔
石长江
周彪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology Beijing CUMTB
State Grid Jiangsu Electric Power Co Ltd
State Grid Electric Power Research Institute
Original Assignee
China University of Mining and Technology Beijing CUMTB
State Grid Jiangsu Electric Power Co Ltd
State Grid Electric Power Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by China University of Mining and Technology Beijing CUMTB, State Grid Jiangsu Electric Power Co Ltd, State Grid Electric Power Research Institute filed Critical China University of Mining and Technology Beijing CUMTB
Priority to CN202010773650.5A priority Critical patent/CN111948343A/en
Publication of CN111948343A publication Critical patent/CN111948343A/en
Pending legal-status Critical Current

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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention belongs to the field of foam stability determination, in particular to a device for determining foam stability, which aims to solve the problems that the pressure change of foam rupture and collapse cannot be monitored in real time and the manual reading has larger error in the prior art, and provides the following scheme, wherein the device comprises a paperless recorder, a wind pressure transmitter, a mass flow meter, a test tube, a reference tube, a pressure reducing valve, an N pressure sensor, a pressure sensor2Gas cylinder, said N2The upper end of the gas cylinder is provided with N2Gas port, said N2The left end of the air port is connected with N2Trachea, said N2The left end of the air pipe is provided with a pressure reducing valve, and the pressure reducing valve is three-sectioned N2The first air pipe three-way connecting piece is connected between the air pipes, and the foam dynamic defoaming device is suitable for researching a foam dynamic defoaming process, recording the pressure generated by the foam in real time and measuring the stability of the foam. The foam collapse and rupture visual observation device is simple in structure and low in cost, can realize visual observation of foam pressure change in the whole process of foam collapse and rupture, and quantitatively represents bubblesFoam stability is of great significance.

Description

Device for measuring foam stability
Technical Field
The invention relates to the field of foam stability determination, in particular to a device for determining foam stability.
Background
The foam fire-extinguishing agent is an effective fire-extinguishing agent for extinguishing flammable liquid, and is mainly characterized by that on the surface of liquid a coagulated foam floating layer is formed, so that it can produce the action of suffocation and cooling, and can be used for extinguishing water-insoluble flammable liquid and general solid fire. The foam extinguishing agent is divided into chemical foam, air foam, fluoroprotein foam, aqueous film-forming foam, anti-solubility foam and the like. In order to accurately evaluate the technical performance of the foam solution, the technical indexes of foam solution evaluation, including indexes such as foaming times, pH value, 25% liquid separation time, 50% liquid separation time and the like, need to be referred to according to GB 15308-2006-foam extinguishing agent. Wherein, the 25 percent of liquid separating time and the 50 percent of liquid separating time represent the stability of the fire extinguishing agent foam, and a device for measuring the foam stability is comprehensively developed by means of modern scientific technologies, such as advanced pressure measurement, a precise pressure sensing technology, a gas flow rate control technology, high-strength pressure-resistant materials and the like.
At present, in the existing device for measuring the foam stability, the initial air pressure of a reference tube of a test tube is inconsistent, the size of foam in the test tube is greatly different, time and labor are consumed, and the manual reading of a rotor flow meter and a tilting micro-manometer is inaccurate. These all limit the accurate determination of foam stability and do not allow accurate quantification of foam fire suppressant performance parameters.
Disclosure of Invention
The invention aims to solve the problems that the pressure change of foam breakage and collapse cannot be monitored in real time and manual reading has large errors in the prior art, and provides a device for measuring the foam stability.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for determining the stability of foam comprising N2A gas cylinder, a first mass flow meter, a second mass flow meter, a test tube and a reference tube, wherein N is2The upper end of the gas cylinder is provided with N2Gas port, said N2The left end of the air port is connected with N2Trachea, said N2The left end of the air pipe is provided with a pressure reducing valve, and the pressure reducing valve is three-sectioned N2Be connected with first trachea tee junction spare between the trachea, the left side of first trachea tee junction spare is provided with first mass flow meter, the right side of first trachea tee junction spare is provided with second mass flow meter, first ball valve is installed to first mass flow meter's the upper left side, second mass flow meter's the upper right side is provided with the second ball valveThe utility model discloses a test pipe, including first ball valve, reference pipe, third trachea tee junction spare, fifth ball valve, wind pressure changer, the end-to-end connection of electric wire has no paper record appearance, and the test pipe is installed to the upside of first ball valve, the reference pipe is installed to the upside of second ball valve, the upside of test pipe is connected with second trachea tee junction spare, the upside of reference pipe is connected with third trachea tee junction spare, fifth ball valve is installed on the right side of second trachea tee junction spare, sixth ball valve is installed in the left side of third trachea tee junction spare, fifth ball valve with the wind pressure changer is installed to the upside of sixth ball valve.
Preferably, said N is2The upper end of the air port is connected with N2Cylinder valve, said N2Cylinder valve and said N2A gas cylinder anti-skid gasket is arranged between the gas ports, N2The left end of the air port is provided with an air bottle sealing ring.
Preferably, the left end, the right end and the lower end of the first trachea three-way connecting piece are provided with trachea three-way connecting piece sealing rings.
Preferably, a sealing floating ball is arranged in the first ball valve, and a key pin penetrates through the center of the first ball valve.
Preferably, the test tube and the reference tube are glass cylinders, and the inner diameter, height and wall thickness of the glass cylinders can be changed but need to be consistent.
Preferably, a third ball valve is arranged at the upper end of the second air pipe three-way connecting piece, a fourth ball valve is arranged at the upper end of the third air pipe three-way connecting piece, and N is arranged at the upper ends of the third ball valve and the fourth ball valve2The air pipe is directly connected with the outside air.
In the invention, the test tube and the reference tube are arranged and are glass cylinders, the inner diameter, the height and the wall thickness of the glass cylinders can be changed, but the inner diameter, the height and the wall thickness of the test tube and the reference tube are kept consistent, and the N is filled by arranging the first mass flow meter and the second mass flow meter2Is the same, thereby charging N2The initial pressure in the rear test tube and the reference tube is the same, and the third ball valve and the fourth ball valve are arrangedSo as to achieve the contact between the inside of the device and the atmosphere, and ensure that the pressure difference measured by the wind pressure transmitter is the pressure generated by the rupture of the foam in the test tube.
According to the invention, the wind pressure transmitter and the paperless recorder are arranged and connected through a wire, and the paperless recorder outputs a pressure change result; the device realizes the visualization of foam stability change in the process of foam collapse and rupture in the test tube.
Drawings
FIG. 1 is a schematic view of the overall structure of an apparatus for measuring foam stability according to the present invention;
FIG. 2 shows a diagram of N of a device for measuring foam stability according to the present invention2The structure of the air port is shown schematically;
FIG. 3 is a schematic structural diagram of a first three-way connection of a gas pipe of the apparatus for measuring foam stability according to the present invention;
fig. 4 is a schematic structural diagram of a first ball valve of an apparatus for measuring foam stability according to the present invention.
In the figure: 1. n is a radical of2A gas port; 101. n is a radical of2A cylinder valve; 102. a gas cylinder anti-slip gasket; 103. a gas cylinder sealing ring; 2. n is a radical of2A gas cylinder; 3. n is a radical of2An air tube; 4. a pressure reducing valve; 5. a first gas pipe tee connection; 501. a sealing ring of the three-way connecting piece of the air pipe; 6. a first mass flow meter; 7. a second mass flow meter; 8. a first ball valve; 801. sealing the floating ball; 802. a key pin; 9. a second ball valve; 10. a test tube; 11. a reference tube; 12. a second gas pipe tee joint connector; 13. a third gas pipe tee joint connector; 14. a third ball valve; 15. a fourth ball valve; 16. a fifth ball valve; 17. a sixth ball valve; 18. a wind pressure transmitter; 19. an electric wire; 20. paperless recorder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
Referring to FIGS. 1-4, an apparatus for measuring foam stability includes N2Gas cylinder 2, first mass flow meter 6, second mass flow meter 7, test tube 10 and reference tube 11, wherein N is2The upper end of the gas cylinder 2 is provided with N2Gas port 1, said N2The left end of the air port 1 is connected with N2Trachea 3, said N2A pressure reducing valve 4 is arranged at the left end of the air pipe 3, and the pressure reducing valve is divided into three sections N2Be connected with first trachea three way connection spare 5 between trachea 3, the left side of first trachea three way connection spare 5 is provided with first mass flow meter 6, the right side of first trachea three way connection spare 5 is provided with second mass flow meter 7, first ball valve 8 is installed to the upper left side of first mass flow meter 6, the upper right side of second mass flow meter 7 is provided with second ball valve 9, test tube 10 is installed to the upside of first ball valve 8, reference tube 11 is installed to the upside of second ball valve 9, the upside of test tube 10 is connected with second trachea three way connection spare 12, the upside of reference tube 11 is connected with third trachea three way connection spare 13, fifth ball valve 16 is installed on the right side of second trachea three way connection spare 12, sixth ball valve 17 is installed in the left side of third trachea three way connection spare 13, wind pressure changer 18 is installed to fifth ball valve 16 and the upside of sixth ball valve 17, the upper end of wind pressure transmitter 18 is connected with electric wire 19, the end connection of electric wire 19 has no paper record appearance 20, can output pressure variation result.
In the present invention, said N2The upper end of the air port 1 is connected with N2Cylinder valve 101, N2Cylinder valve 101 and said N2A cylinder anti-slip gasket 102 is arranged between the gas ports 1 to prevent opening or closing of N2The slipping condition occurs at the time of the cylinder valve 101, N2The left end of the gas port 1 is provided with a gas cylinder sealing ring 103, so that N2The connection between port 1 and N2 tube 3 is tighter.
In the invention, the left end, the right end and the lower end of the first trachea three-way connecting piece 5 are respectively provided with the trachea three-way connecting piece sealing ring 501, so that no gap is formed between the trachea three-way connecting piece and the N2 trachea 3.
In the invention, the first ball valve 8 is internally provided with the sealing floating ball 801, and the key pin 802 is inserted in the center of the first ball valve 8, so that the air tightness effect of the ball valve can be improved.
In the invention, the test tube 10 and the reference tube 11 are glass cylinders, the inner diameter, height and wall thickness of the glass cylinders can be changed, but the inner diameter, height and wall thickness of the test tube 10 and the reference tube 11 need to be kept consistent, and the visualization of foam stability change in the process of foam collapse and rupture in the test tube is realized.
In the invention, the upper end of the second air pipe three-way connecting piece 12 is provided with a third ball valve 14, the upper end of the third air pipe three-way connecting piece 13 is provided with a fourth ball valve 15, the N2 air pipes 3 at the upper ends of the third ball valve 14 and the fourth ball valve 15 are directly connected with the outside air, the contact between the inside of the device and the atmosphere can be adjusted, and the pressure difference measured by a wind pressure transmitter is the pressure generated by the rupture of the foam in the test pipe.
In the invention, the prepared foam liquid is poured into a test tube 10, the test tube 10 is horizontally placed and slowly rotated to wet the tube wall, the test tube 10 is installed back after being wetted and then is connected with each part of a testing device, and a first ball valve 8, a second ball valve 9, a third ball valve 14 and a fourth ball valve 15 are opened; closing the fifth ball valve 16 and the fifth ball valve 17; the paperless recorder 20 is opened and zeroed; opening N2The gas cylinder 2 and the pressure reducing valve 4 regulate the first mass flow meter 6 and the second mass flow meter 7 to make the flow rates of the first mass flow meter and the second mass flow meter be the same and smaller; at this time, the foam concentrate in the test tube 10 was changed with N2Is charged to generate foam, and N is closed after the test tube 10 is filled with the fine foam2 A gas cylinder 2 and a pressure reducing valve 4; the first mass flow meter 6 and the second mass flow meter 7 are shut down; a first ball valve 8, a second ball valve 9, a third ball valve 14 and a fourth ball valve 15; opening the fifth ball valve 16 and the fifth ball valve 17; the pressure difference measured by the pressure transducer 18 during the test is the pressure generated by the collapse and rupture of the foam in the test tube 10. The data monitored by the paperless recorder 20 is exported to a computer.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (6)

1. A device for determining the stability of foam comprising N2A gas cylinder (2), a first mass flow meter (6), a second mass flow meter (7), a test tube (10), and a reference tube (11), wherein N is2The upper end of the gas cylinder (2) is provided with N2Gas port (1), said N2The left end of the air port (1) is connected with N2A gas pipe (3), said N2A pressure reducing valve (4) is arranged at the left end of the air pipe (3), and N is arranged at the three sections2Be connected with first trachea tee junction spare (5) between trachea (3), the left side of first trachea tee junction spare (5) is provided with first mass flow meter (6), the right side of first trachea tee junction spare (5) is provided with second mass flow meter (7), first ball valve (8) are installed to the upper left side of first mass flow meter (6), the upper right side of second mass flow meter (7) is provided with second ball valve (9), test tube (10) are installed to the upside of first ball valve (8), reference pipe (11) are installed to the upside of second ball valve (9), the upside of test tube (10) is connected with second trachea tee junction spare (12), the upside of reference pipe (11) is connected with third trachea tee junction spare (13), fifth ball valve (16) are installed on the right side of second trachea tee junction spare (12), sixth ball valve (17) are installed in the left side of third trachea tee junction spare (13), fifth ball valve (16) with wind pressure changer (18) are installed to the upside of sixth ball valve (17), the upper end of wind pressure changer (18) is connected with electric wire (19), the end-to-end connection of electric wire (19) has no paper record appearance (20).
2. The device for measuring foam stability of claim 1, wherein N is2The upper end of the air port (1) is connected with N2Cylinder valve (101), N2Cylinder valve (101) and said N2A gas cylinder anti-skid gasket (102) is arranged between the gas ports (1), N2Of gas ports (1)The left end is provided with a gas cylinder sealing ring (103).
3. The apparatus for measuring foam stability according to claim 1, wherein the left end, the right end and the lower end of the first trachea three-way connection piece (5) are provided with trachea three-way connection piece sealing rings (501).
4. A device for determining the stability of foam according to claim 3, characterized in that a sealing float (801) is provided in said first ball valve (8), and a key pin (802) is inserted through the center of said first ball valve (8).
5. The device for measuring the foam stability according to claim 1, wherein the test tube (10) and the reference tube (11) are glass cylinders, and the inner diameter, height and wall thickness of the glass cylinders can be changed but are required to be consistent.
6. An apparatus for measuring foam stability according to claim 1, wherein the upper end of the second gas pipe tee joint (12) is provided with a third ball valve (14), the upper end of the third gas pipe tee joint (13) is provided with a fourth ball valve (15), and the upper ends of the third ball valve (14) and the fourth ball valve (15) are provided with a third ball valve (14) and a fourth ball valve (15), respectively2The air pipe (3) is directly connected with the outside air.
CN202010773650.5A 2020-08-04 2020-08-04 Device for measuring foam stability Pending CN111948343A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010773650.5A CN111948343A (en) 2020-08-04 2020-08-04 Device for measuring foam stability

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Application Number Priority Date Filing Date Title
CN202010773650.5A CN111948343A (en) 2020-08-04 2020-08-04 Device for measuring foam stability

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CN111948343A true CN111948343A (en) 2020-11-17

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203376303U (en) * 2013-08-13 2014-01-01 北京市市政四建设工程有限责任公司 Foam test apparatus
CN104034629A (en) * 2014-06-26 2014-09-10 中国石油大学(华东) Foam pipe rheological test system and application thereof
CN206224229U (en) * 2016-12-05 2017-06-06 云南磷化集团有限公司 A kind of flotation column bubble generator automaton
CN206420850U (en) * 2017-01-05 2017-08-18 中国石油大学(华东) A kind of no benzene Guan Liuzhong microbubbles move visual experimental apparatus
CN109490483A (en) * 2018-12-07 2019-03-19 中国科学技术大学 A kind of multifunctional foam occurs and foam performance test device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203376303U (en) * 2013-08-13 2014-01-01 北京市市政四建设工程有限责任公司 Foam test apparatus
CN104034629A (en) * 2014-06-26 2014-09-10 中国石油大学(华东) Foam pipe rheological test system and application thereof
CN206224229U (en) * 2016-12-05 2017-06-06 云南磷化集团有限公司 A kind of flotation column bubble generator automaton
CN206420850U (en) * 2017-01-05 2017-08-18 中国石油大学(华东) A kind of no benzene Guan Liuzhong microbubbles move visual experimental apparatus
CN109490483A (en) * 2018-12-07 2019-03-19 中国科学技术大学 A kind of multifunctional foam occurs and foam performance test device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈鹏 等: "增黏剂对水基泡沫性能影响的实验研究", 《矿业科学学报》, vol. 1, no. 3, 31 December 2016 (2016-12-31), pages 243 - 248 *

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Application publication date: 20201117

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