CN113155704B - Porous material aperture testing device and testing method thereof - Google Patents
Porous material aperture testing device and testing method thereof Download PDFInfo
- Publication number
- CN113155704B CN113155704B CN202110471041.9A CN202110471041A CN113155704B CN 113155704 B CN113155704 B CN 113155704B CN 202110471041 A CN202110471041 A CN 202110471041A CN 113155704 B CN113155704 B CN 113155704B
- Authority
- CN
- China
- Prior art keywords
- ball valve
- porous material
- flow sensor
- detection port
- gear
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- 239000011148 porous material Substances 0.000 title claims abstract description 87
- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 238000001514 detection method Methods 0.000 claims abstract description 73
- 239000007788 liquid Substances 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000007664 blowing Methods 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000013459 approach Methods 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000004154 testing of material Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a porous material aperture testing device, which comprises: a lower chamber; the side of the lower chamber is provided with an air inlet and a first pressure detection port, and the top of the lower chamber is provided with a first sample detection port; the air inlet is externally connected with an air inlet control device; the first pressure detection port is externally connected with a first pressure sensor; the opening of the first sample detection port faces upwards; an upper chamber, which is arranged and fixed above the lower chamber; the side surface of the upper chamber is provided with a liquid adding port and a second pressure detecting port; the invention also provides a corresponding detection method, which has the beneficial effects that: the dry method and the wet method of the porous material are sequentially finished on the same equipment, only one piece of equipment is needed, and the cost is saved; in addition, the dry method is finished and then the wet method is finished, so that the porous material does not need to be moved, and the dry method and the wet method are all detected on the same position of the porous material, so that deviation caused by movement is avoided, and the accuracy of a final result is ensured.
Description
Technical Field
The invention relates to a porous material aperture testing device and a testing method thereof.
Background
The porous material is a material with a network structure formed by mutually communicated or closed holes; the porous material can improve mechanical properties such as strength, rigidity and the like, and simultaneously reduce density, so that the porous material has certain advantages when applied to the aerospace industry; the early detection of the performance is also an extremely important step, the main parameters of the porous structure are porosity, average pore diameter, maximum pore diameter and the like, and the porous structure parameters and certain use performances (such as permeability and the like) have various measurement principles and methods; the detection is usually carried out by a bubble method, a gas permeation method, an adsorption method, a mercury pressure method and the like, the detection method which is commonly used at present comprises the bubble method and the gas permeation method, the performance parameters of different average pore diameters, maximum pore diameters and air permeability of the porous material are obtained, and a performance chart is drawn according to corresponding data.
Currently, porous material detection has the following problems: the first, the wet detection that the bubble method represents and the dry detection that the gas permeation method represents can't be realized on the identical apparatus, need two corresponding apparatuses to measure many times, result in high costs, inefficiency; secondly, the same position of the porous material is detected by the dry method and the wet method, and after the detection of the dry method detection equipment is completed, the porous material is required to be removed and transferred to the wet method detection equipment, and a certain deviation is generated in a detection area, so that the final result is influenced; thirdly, the dry method and the wet method data are respectively input into equipment in the later period, and the performance form of the porous material is regenerated, so that the process is troublesome and the efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects and provide a porous material aperture testing device and a testing method thereof.
The invention adopts the following technical scheme:
A porous material pore size testing device comprising: a lower chamber; the side of the lower chamber is provided with an air inlet and a first pressure detection port, and the top of the lower chamber is provided with a first sample detection port; the air inlet is externally connected with an air inlet control device; the first pressure detection port is externally connected with a first pressure sensor; the opening of the first sample detection port faces upwards; an upper chamber, which is arranged and fixed above the lower chamber; the side surface of the upper chamber is provided with a liquid adding port and a second pressure detecting port; an air outlet is formed in the top of the upper cavity; the bottom of the upper cavity is provided with a second detection port; the liquid adding port is externally connected with a liquid adding device; the second pressure detection port is externally connected with a second pressure sensor; the air outlet is externally connected with a flow sensor; the second sample detection port is downward in opening, is aligned with the first sample detection port and forms a slit matched with the porous material to be detected; a seal member attached around the first pressure detection port and the second pressure detection port; the liquid blocking plate is arranged between the second detection port and the air outlet and used for blocking liquid from passing through; the jacking device is installed and connected below the lower cavity and used for jacking the lower cavity; and the control system is used for receiving data of the first pressure sensor, the second pressure sensor and the flow sensor and controlling the air inlet control device, the liquid adding device and the top pressure device to work.
Preferably, the bottom of the lower chamber is also provided with a liquid outlet; the liquid outlet is connected with a first ball valve; the control system controls the first ball valve; the air outlet is also connected with a back-blowing air circuit, and the back-blowing air circuit and the flow sensor are installed in parallel.
Preferably, the air inlet control device is provided with a second valve, and the second valve is a regulating valve; the liquid adding device is provided with a third ball valve; the back-blowing air circuit is provided with a fourth ball valve; the flow sensor is provided with a flow ball valve.
Preferably, the flow sensor comprises a 30ml flow sensor and a 50L flow sensor; the 30ml flow sensor and the 50L flow sensor are connected in parallel; the flow ball valve comprises a fifth ball valve and a sixth ball valve; the fifth ball valve is connected with the 30ml flow sensor; the sixth ball valve is connected with the 50L flow sensor.
Preferably, the system further comprises an information output processing device; the information output processing device includes a display device for displaying material properties, and a printer for printing material properties.
Preferably, the first sample detection port is smaller than or equal to the second sample detection port.
Preferably, the upper chamber is mounted by a mounting bracket; ; the mounting bracket comprises an upper test mounting plate and a lower test mounting plate; the upper chamber is mounted on the upper test mounting plate; the jacking device is arranged in the shaft sleeve; the shaft sleeve is fixedly arranged below the lower test mounting plate.
Preferably, the mounting bracket is also provided with a traveling device; the walking device comprises a first screw rod, a first polish rod, a second screw rod and a second polish rod, wherein the first polish rod and the second polish rod are installed in a matched mode; the lower test mounting plate is mounted on the first screw rod and the first polish rod, and the first screw rod is driven by a first gear; the upper test mounting plate is mounted on the second screw rod and the second polished rod, and the second screw rod is driven by a second gear; the first gear and the second gear have the same modulus of tooth, are not meshed, and are meshed with the third gear at the same time; the third gear is connected with the first motor; the control system controls the first motor.
Preferably, a feeding device is further provided, and the feeding device comprises a mounting bracket mounted on the mounting bracket: an upper roller; a lower roller which is matched with the upper roller; the fifth gear is connected with the upper roller and drives the upper roller to rotate; the sixth gear is connected with the lower roller and drives the lower roller to rotate, and the sixth gear is meshed with the fifth gear; a fourth gear engaged with the sixth gear; the second motor is connected with and drives the fourth gear; the control system controls the second motor.
A method of testing a porous material testing device, comprising the steps of:
And step one, placing a porous material sample to be measured between a first pressure detection port of the lower chamber and a second pressure detection port of the upper chamber.
And step two, starting the jacking device, so that the porous material sample is clamped between the first pressure detection port and the second pressure detection port, and the sealing element ensures that the porous material sample is clamped and has sealing and buffering functions.
Step three, opening an air inlet control device, a second valve and a fifth ball valve; and regulating the second valve to control the air inflow, recording the values of the upper pressure sensor, the lower pressure sensor and the value of the 30ml flow sensor by the control system, closing the fifth ball valve by the control system when the value of the 30ml flow sensor approaches to the extreme value, opening the sixth ball valve, and reading and recording the value of the 50L flow sensor by the control system.
And fourthly, recording at least twenty groups of data until the pressure difference of the upper pressure sensor and the lower pressure sensor reaches a program set value, closing the air inlet control device, the second valve and the sixth ball valve, completing dry test, and calculating the ventilation value of the test sample.
And fifthly, opening the liquid adding device and the third ball valve, adding the test liquid into the upper cavity, covering the upper end of the tested porous material sample, and closing the liquid adding device and the third ball valve.
Step six, after the porous material sample is fully wetted after being stationary for a period of time, the air inlet control device, the second valve and the fifth ball valve are opened, and the liquid blocking plate ensures that detection liquid cannot be blown into the flow sensor to influence the result; and regulating the second valve to control the air inflow, and recording the numerical value of the 30ml flow sensor, the numerical values of the upper pressure sensor and the lower pressure sensor when the 30ml flow sensor detects the change of the air.
And seventhly, adjusting the second valve to increase the air quantity, recording the values of the upper pressure sensor and the lower pressure sensor and the value of the 30ml flow sensor by the control system, closing the fifth ball valve by the control system when the value of the 30ml flow sensor approaches an extreme value, opening the sixth ball valve, and reading and recording the value of the 50L flow sensor by the control system.
And step eight, continuously increasing the gas quantity, recording the numerical values of a 50L flow sensor, an upper pressure sensor and a lower pressure sensor, reading at least twenty groups of data, closing the gas inlet control device, the second valve and the sixth ball valve, completing wet test, and calculating the maximum and minimum apertures of the required test sample.
And step nine, data processing, namely generating flow-pressure difference curves under dry and wet conditions by taking pressure difference as an abscissa and gas flow as an ordinate according to the read data to obtain average pore diameter difference and average pore diameter, calculating pore diameter and pore diameter distribution of a filter medium according to a formula, and displaying and printing results.
Step ten, opening the back-blowing gas circuit and the fourth ball valve, and reversely blowing the test liquid into the porous material sample at the second pressure detection port and falling into the lower chamber; opening the first ball valve, discharging the dropped test liquid through the liquid outlet, and closing the back blowing air path, the fourth ball valve and the first ball valve; and releasing the pressing device, and taking out the porous material sample.
The beneficial effects of the invention are as follows: the dry method and the wet method of the porous material are sequentially finished on the same equipment, only one piece of equipment is needed, and the cost is saved; in addition, the dry method is finished and then the wet method is finished, so that the porous materials are detected on the same position of the porous materials by the dry method and the wet method, deviation caused by movement is avoided, the accuracy of a final result is ensured, the running gear can randomly select points to be tested for a large piece of porous filter materials, the PLC automatically collects experimental data of the dry method and the wet method, the production of a porous material performance table is generated, the porous material performance data is printed, and the efficiency is greatly improved.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic diagram of the present invention.
Fig. 3 is an overall schematic of the present invention.
Fig. 4 is an enlarged view of a portion of the present invention.
Detailed Description
In order to make the purpose and technical scheme of the present invention more clear, the present invention is further described below with reference to the accompanying drawings and examples:
The porous material pore diameter testing device as shown in fig. 1 to 4 comprises: the device comprises a lower chamber 3, wherein an air inlet 31 and a first pressure detection port 32 are formed in the side edge of the lower chamber 3, and a first sample detection port 33 is formed in the top of the lower chamber 3; the air inlet 31 is externally connected with an air inlet control device; the first pressure detection port 32 is externally connected with a first pressure sensor 21; the first sample detection port 33 is opened upwards; an upper chamber 5 mounted and fixed above the lower chamber 3; the side surface of the upper chamber 5 is provided with a liquid adding port 54 and a second pressure detecting port 52; the top of the upper chamber 5 is provided with an air outlet 51; the bottom of the upper chamber 5 is provided with a second detection port 53; the liquid filling port 54 is externally connected with a liquid filling device (not shown in the figure); the second pressure detecting port 52 is externally connected with a second pressure sensor 22; the air outlet 51 is externally connected with a flow sensor 6; the second sample detection port 53 is downward and aligned with the first sample detection port 33 to form a slit adapted to the porous material to be detected; a seal 34 attached around the first pressure detection port 33 and the second pressure detection port 53; the liquid blocking plate 55 is arranged between the second detection port 53 and the air outlet 51 through a bracket 551, and prevents liquid from passing through, so that a small amount of liquid is prevented from being blown into the flow sensor to influence the test result when the air is blown upwards in the wet test process; the jacking device 7 is fixedly connected with the butt joint 36 below the lower chamber 3 and is used for jacking the lower chamber 3; the control system (not shown in the figure) is a PLC, receives data of the first pressure sensor 22, the second pressure sensor 21 and the flow sensor 6, and controls the air inlet control device, the liquid feeding device and the top pressure device 7 to work.
Preferably, the bottom of the lower chamber 3 is also provided with a liquid outlet 35; the liquid drain port 35 is connected with a first ball valve 351; the control system controls the first ball valve 351; the air outlet 51 is also connected with a back-blowing air channel 8, and the back-blowing air channel 8 and the flow sensor 6 are installed in parallel.
Preferably, the air intake control device 31 is provided with a second valve 311, and the second valve 311 is a regulating valve; preferably, the second valve 311 is an electric needle valve; the liquid adding device 54 is provided with a third ball valve 541; the back-blowing air circuit 8 is provided with a fourth ball valve 81; the flow sensor 6 is provided with a flow ball valve.
Preferably, the flow sensor 6 comprises a 30ml flow sensor 61, a 50L flow sensor 62; the 30ml flow sensor 61 and the 50L flow sensor 62 are connected in parallel; the flow ball valves comprise a fifth ball valve 611 and a sixth ball valve 621; the fifth ball valve 611 is connected to the 30ml flow sensor 61; the sixth ball valve 621 is connected to the 50L flow sensor 62.
Preferably, the liquid-blocking plate 55 forms an arc-shaped cover with a small bottom and a gradually enlarged opening; the opening of the liquid blocking plate 55 is larger than the second detection port.
Preferably, the device further comprises an information output processing device (not shown in the figure); the information output processing device includes a display device for displaying material properties, and a printer for printing material properties.
Preferably, the first sample detection port 33 is not more than the second sample detection port 53.
Preferably, the upper chamber is mounted by a mounting bracket 1; the mounting bracket comprises an upper test mounting plate 12 and a lower test mounting plate 11; the upper chamber 5 is mounted on the upper test mounting plate 12; the jacking device 7 is a cylinder and is arranged in the shaft sleeve 71; the sleeve 71 is fixedly mounted below the lower test mounting plate 11.
Preferably, the mounting bracket is also provided with a traveling device; the walking device comprises a first screw rod 91, a first polished rod 92, a second screw rod 93 and a second polished rod 94, wherein the first polished rod 92 and the second screw rod 93 are arranged in a matched mode, and the second polished rod 94 is arranged in a matched mode; the lower test mounting plate 11 is mounted on the first screw rod 91 and the first polished rod 92, and the first screw rod 91 is driven by the first gear 101; the upper test mounting plate 12 is mounted on the second screw rod 93 and the second polished rod 94, and the second screw rod 93 is driven by a second gear 102; the first gear 101 and the second gear 102 have the same modulus tooth number but are not meshed, and are simultaneously meshed with the third gear 103; the third gear 103 is connected with a first motor 111; the control system controls the first motor 111.
Preferably, a feeding device is further provided, and the feeding device includes: a second motor 112 mounted on the mounting bracket 1, the control system controlling the second motor 112; a fourth gear 104, the second motor 112 driving the fourth gear 104; the upper roller 13, while installing the fifth gear 105; a lower roller 14 having a sixth gear 106 attached thereto, the sixth gear 106 being engaged with the fifth gear 105; the fourth gear 104 drives the fifth gear 105 and the sixth gear 106 to move, which can be achieved in several ways: the fourth gear 104 may be meshed with the fifth gear 105, or the fourth gear 104 may be meshed with the sixth gear 106; a seventh gear 107 may be installed on the lower roller, so that the fourth gear 104 is meshed with the seventh gear 107, and the fourth gear 104 moves to drive the seventh gear 107 to move, further drive the lower roller 14 to move, and then drive the sixth gear 106 to synchronously and reversely move with the fifth gear 105.
A method of testing a porous material testing device, comprising the steps of:
Step one, the porous material sample 15 to be measured is placed between the first pressure detection port 33 of the lower chamber and the second pressure detection port 53 of the upper chamber.
Step two, the jacking device 7 is started, so that the porous material sample 15 is clamped between the first pressure detection port and the second pressure detection port 33, and the sealing element 34 ensures that the porous material sample 15 is clamped and has sealing and buffering functions.
Step three, opening the air intake control device 31, the second valve 311 and the fifth ball valve 611; adjusting the second valve 311 to control the air inflow, the control system records the values of the upper pressure sensor 22, the lower pressure sensor 21 and the value of the 30ml flow sensor 61, when the value of the flow sensor 61 approaches to the extreme value through the 30ml flow sensor 61, the control system closes the fifth ball valve 611, simultaneously opens the sixth ball valve 621, and the control system reads and records the value of the 50L flow sensor 621.
And fourthly, recording at least twenty groups of data until the pressure difference between the upper pressure sensor 22 and the lower pressure sensor 21 reaches a program set value, closing the air inlet control device 31, the second valve 311 and the sixth ball valve 621, completing the dry test, and calculating the ventilation value of the test sample.
And step five, opening the liquid adding device and the third ball valve 541, adding the test liquid into the upper chamber 5, covering the upper end of the tested porous material sample 15, and closing the liquid adding device and the third ball valve 541.
Step six, after the porous material sample 15 is fully wetted after being stationary for a period of time, the air inlet control device 31, the second valve 311 and the fifth ball valve 611 are opened, and the liquid blocking plate 55 ensures that the detection liquid cannot be blown into the flow sensor 6, so that the result is influenced; adjusting the second valve 311 controls the intake air amount, and when the 30ml flow sensor 61 detects a change in gas, the control system records the value of the 30ml flow sensor 61 and the values of the upper pressure sensor 22 and the lower pressure sensor 21 at that time.
And step seven, adjusting the second valve 311 to increase the air volume, recording the values of the upper pressure sensor 22 and the lower pressure sensor 21 and the value of the 30ml flow sensor 61 by the control system, closing the fifth ball valve 611 when the value of the 30ml flow sensor 61 approaches an extreme value, opening the sixth ball valve 621, and reading and recording the value of the 50L flow sensor 62 by the control system.
And step eight, continuously increasing the air quantity, recording the numerical values of the 50L flow sensor 62, the upper pressure sensor 22 and the lower pressure sensor 21, reading at least twenty groups of data, closing the air inlet control device 31, the second valve 311 and the sixth ball valve 621, completing wet test, and calculating the maximum and minimum apertures of the required test samples.
And step nine, data processing, namely generating flow-pressure difference curves under dry and wet conditions by taking pressure difference as an abscissa and gas flow as an ordinate according to the read data to obtain average pore diameter difference and average pore diameter, calculating pore diameter and pore diameter distribution of a filter medium according to a formula, and displaying and printing results.
Step ten, opening the back-blowing air channel 8 and the fourth ball valve 81, and back-blowing the test liquid into the porous material sample 15at the second pressure detection port 53 and falling into the lower chamber; opening the first ball valve 351, discharging the dropped test liquid through the liquid outlet 35, and closing the back-blowing air passage 8, the fourth ball valve 81 and the first ball valve 351; the jacking device is released, and the porous material sample is taken out 7.
In the present invention, if a feeding device and a traveling device are provided, in the first step, a porous material sample 15 is fed through the feeding device and the detection position of the porous material is adjusted by the traveling device; in the tenth and final step, the top pressing device is loosened, the running device moves, the lower chamber 3 and the upper chamber 5 are moved to the next designated position of the porous material sample 15, the test is performed again, the PLC automatically takes out a plurality of points of the porous material sample 15 according to the preset, the dry test and the wet test are performed respectively, more detailed values of the porous material are obtained, and after all the tests are completed, the porous material sample 15 is taken out.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The components adopted by the invention are all general standard components or components known to the person skilled in the art, and the structures and principles of the components are all known to the person skilled in the art through technical manuals or through routine experimental methods.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the scope of the present invention.
Claims (7)
1. A porous material pore size testing device, comprising:
A lower chamber;
The side of the lower chamber is provided with an air inlet and a first pressure detection port, and the top of the lower chamber is provided with a first sample detection port;
The air inlet is externally connected with an air inlet control device; the first pressure detection port is externally connected with a first pressure sensor; the opening of the first sample detection port faces upwards;
An upper chamber, which is arranged and fixed above the lower chamber; the upper chamber is installed through an installation bracket; the mounting bracket comprises an upper test mounting plate and a lower test mounting plate; the upper chamber is mounted on the upper test mounting plate;
the side surface of the upper chamber is provided with a liquid adding port and a second pressure detecting port; an air outlet is formed in the top of the upper cavity; the bottom of the upper cavity is provided with a second sample detection port; the first sample detection port is smaller than or equal to the second sample detection port;
the liquid adding port is externally connected with a liquid adding device; the second pressure detection port is externally connected with a second pressure sensor; the air outlet is externally connected with a flow sensor; the second sample detection port is downward in opening, is aligned with the first sample detection port and forms a slit matched with the porous material to be detected;
a seal member attached around the first pressure detection port and the second pressure detection port;
the liquid blocking plate is arranged between the second sample detection port and the air outlet and used for blocking liquid from passing through;
The jacking device is installed and connected below the lower cavity and used for jacking the lower cavity; the jacking device is arranged in the shaft sleeve; the shaft sleeve is fixedly arranged below the lower test mounting plate;
the control system receives data of the first pressure sensor, the second pressure sensor and the flow sensor and controls the air inlet control device, the liquid adding device and the top pressure device to work;
the mounting bracket is also provided with a traveling device;
the walking device comprises a first screw rod, a first polish rod, a second screw rod and a second polish rod, wherein the first polish rod and the second polish rod are installed in a matched mode;
the lower test mounting plate is mounted on the first screw rod and the first polish rod, and the first screw rod is driven by a first gear;
the upper test mounting plate is mounted on the second screw rod and the second polished rod, and the second screw rod is driven by a second gear;
The first gear and the second gear have the same modulus of tooth, are not meshed, and are meshed with the third gear at the same time;
The third gear is connected with the first motor;
the control system controls the first motor.
2. The porous material pore size testing device according to claim 1, wherein:
the bottom of the lower chamber is also provided with a liquid outlet;
the liquid outlet is connected with a first ball valve;
the control system controls the first ball valve;
The air outlet is also connected with a back-blowing air circuit, and the back-blowing air circuit and the flow sensor are installed in parallel.
3. A porous material pore size testing device according to claim 2, wherein:
the air inlet control device is provided with a second valve, and the second valve is a regulating valve;
the liquid adding device is provided with a third ball valve;
the back-blowing air circuit is provided with a fourth ball valve;
The flow sensor is provided with a flow ball valve.
4. A porous material pore size testing device according to claim 3, wherein:
the flow sensor comprises a 30ml flow sensor and a 50L flow sensor;
the 30ml flow sensor and the 50L flow sensor are connected in parallel;
The flow ball valve comprises a fifth ball valve and a sixth ball valve;
the fifth ball valve is connected with the 30ml flow sensor;
The sixth ball valve is connected with the 50L flow sensor.
5. The porous material pore size testing device according to claim 4, wherein:
The system also comprises an information output processing device;
The information output processing device includes a display device for displaying material properties, and a printer for printing material properties.
6. The porous material pore size testing device of claim 1, further comprising a feeding device comprising a mounting bracket mounted thereon:
An upper roller;
A lower roller which is matched with the upper roller;
The fifth gear is connected with the upper roller and drives the upper roller to rotate;
the sixth gear is connected with the lower roller and drives the lower roller to rotate, and the sixth gear is meshed with the fifth gear;
a fourth gear engaged with the sixth gear;
The second motor is connected with and drives the fourth gear;
the control system controls the second motor.
7. The method for testing a porous material pore size testing apparatus according to claim 5, comprising the steps of:
step one, placing a porous material sample to be measured between a first pressure detection port of a lower chamber and a second pressure detection port of an upper chamber;
Starting a jacking device to clamp the porous material sample between the first pressure detection port and the second pressure detection port, wherein the sealing element ensures that the porous material sample is clamped and has sealing and buffering functions;
Step three, opening an air inlet control device, a second valve and a fifth ball valve; regulating the second valve to control the air inflow, recording the values of the upper pressure sensor, the lower pressure sensor and the value of the 30ml flow sensor by the control system, closing the fifth ball valve by the control system when the value of the 30ml flow sensor approaches to the extreme value, opening the sixth ball valve at the same time, and reading and recording the value of the 50L flow sensor by the control system;
Recording at least twenty groups of data until the pressure difference of the upper pressure sensor and the lower pressure sensor reaches a program set value, closing the air inlet control device, the second valve and the sixth ball valve, completing dry test, and calculating the ventilation value of the test sample;
Step five, opening the liquid adding device and the third ball valve, adding test liquid into the upper cavity, covering the upper end of the tested porous material sample, and closing the liquid adding device and the third ball valve;
Step six, after the porous material sample is fully wetted after being stationary for a period of time, the air inlet control device, the second valve and the fifth ball valve are opened, and the liquid blocking plate ensures that detection liquid cannot be blown into the flow sensor to influence the result; when the 30ml flow sensor detects the gas change, the control system records the value of the 30ml flow sensor, the values of the upper pressure sensor and the lower pressure sensor at the moment;
Step seven, adjusting the second valve to increase the air quantity, recording the values of an upper pressure sensor, a lower pressure sensor and a 30ml flow sensor by a control system, closing a fifth ball valve by the control system when the value of the flow sensor approaches an extreme value through 30ml, opening a sixth ball valve at the same time, and reading and recording the value of the flow sensor of 50L by the control system;
Step eight, continuously increasing the gas quantity, recording the numerical values of a 50L flow sensor, an upper pressure sensor and a lower pressure sensor, reading at least twenty groups of data, closing the gas inlet control device, the second valve and the sixth ball valve, completing wet test, and calculating the maximum and minimum aperture of a required test sample;
Step nine, data processing, namely generating flow-pressure difference curves under dry and wet conditions by taking pressure difference as an abscissa and gas flow as an ordinate according to the read data to obtain average pore diameter difference and average pore diameter, calculating pore diameter and pore diameter distribution of a filter medium according to a formula, and displaying and printing results;
Step ten, opening the back-blowing gas circuit and the fourth ball valve, and reversely blowing the test liquid into the porous material sample at the second pressure detection port and falling into the lower chamber; opening the first ball valve, discharging the dropped test liquid through the liquid outlet, and closing the back blowing air path, the fourth ball valve and the first ball valve; and releasing the pressing device, and taking out the porous material sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110471041.9A CN113155704B (en) | 2021-04-29 | 2021-04-29 | Porous material aperture testing device and testing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110471041.9A CN113155704B (en) | 2021-04-29 | 2021-04-29 | Porous material aperture testing device and testing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113155704A CN113155704A (en) | 2021-07-23 |
| CN113155704B true CN113155704B (en) | 2024-06-18 |
Family
ID=76872219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110471041.9A Active CN113155704B (en) | 2021-04-29 | 2021-04-29 | Porous material aperture testing device and testing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113155704B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166719B (en) * | 2021-11-27 | 2022-08-12 | 北京擎科生物科技有限公司 | Method and device for screening nucleic acid synthetic vector |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214844674U (en) * | 2021-04-29 | 2021-11-23 | 福建强纶新材料股份有限公司 | Porous material aperture testing arrangement |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2017135C1 (en) * | 1991-06-06 | 1994-07-30 | Девисилов Владимир Аркадьевич | Method of determination of structural characteristics of penetrable materials and device for its accomplishment |
| CN101968430B (en) * | 2010-09-29 | 2012-05-09 | 西安航天华威化工生物工程有限公司 | Device and method for measuring maximum aperture of filter element by dry method |
| CN102087195B (en) * | 2010-12-03 | 2012-07-04 | 宁波大学 | Full-automatic microfiltration membrane aperture distribution tester as well as automatic measuring method and application thereof |
| CN109960300B (en) * | 2017-12-14 | 2020-12-22 | 南京大学 | Fuel cell test gas humidification method |
-
2021
- 2021-04-29 CN CN202110471041.9A patent/CN113155704B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214844674U (en) * | 2021-04-29 | 2021-11-23 | 福建强纶新材料股份有限公司 | Porous material aperture testing arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113155704A (en) | 2021-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113155704B (en) | Porous material aperture testing device and testing method thereof | |
| US2755660A (en) | Permeability tester | |
| WO2005106468A2 (en) | Clamp-on chamber for flow porometry | |
| CN214844674U (en) | Porous material aperture testing arrangement | |
| CN209624313U (en) | Permeability analyzer suitable for micro- gas permeable material | |
| CN109085111B (en) | Active double-piston type ventilation rate standard rod calibration device and calibration method thereof | |
| EP1068507A1 (en) | Method and device for measuring gas permeability through a porous membrane-like material | |
| JP2013509568A (en) | Method for inspecting sealing performance of hand-held piston stroke pipette and sealing performance inspection apparatus therefor | |
| CN211856285U (en) | Novel self-made device for measuring porosity of membrane | |
| CN1147632A (en) | Apparatus for measuring air permeability of molding sand | |
| CN108982332B (en) | Sound resistance testing method and device for sound absorbing material | |
| CN2745059Y (en) | Four-way three-step servo valve core and valve pocket detecting device | |
| CN212364012U (en) | Multifunctional permeable pavement material permeability coefficient testing instrument | |
| CN211347971U (en) | Dynamic performance testing device of tail gas remote measuring equipment | |
| CN210720086U (en) | Rock porosity testing device | |
| CN209356368U (en) | Diaphragm detection device | |
| CN218212537U (en) | Device for testing air permeability of membrane | |
| CN219417147U (en) | Handheld specific surface area quick tester | |
| CN219224497U (en) | Detection device for waterproof breathable film | |
| CN114184240A (en) | Gas flow measuring device applicable to rotary cylinder axial engine | |
| CN111060361A (en) | Fuel system detection device and detection method thereof | |
| US3194056A (en) | Permeability testing method and apparatus | |
| CN204314030U (en) | Hand-held leak detecting device | |
| CN215297074U (en) | Walking positioning device of porous material aperture test equipment | |
| CN213515914U (en) | Automatic calibrating installation of water gauge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |