CN111679064A - Foaming quality detection device of heat preservation foam - Google Patents
Foaming quality detection device of heat preservation foam Download PDFInfo
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- CN111679064A CN111679064A CN201910182069.3A CN201910182069A CN111679064A CN 111679064 A CN111679064 A CN 111679064A CN 201910182069 A CN201910182069 A CN 201910182069A CN 111679064 A CN111679064 A CN 111679064A
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- foaming
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- foaming material
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- 238000005187 foaming Methods 0.000 title claims abstract description 123
- 239000006260 foam Substances 0.000 title claims abstract description 75
- 238000001514 detection method Methods 0.000 title claims abstract description 53
- 238000004321 preservation Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 94
- 238000005070 sampling Methods 0.000 claims abstract description 59
- 238000012545 processing Methods 0.000 claims abstract description 32
- 239000000523 sample Substances 0.000 claims description 18
- 239000002937 thermal insulation foam Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 9
- 239000006261 foam material Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical group O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
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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
- G01N33/44—Resins; Plastics; Rubber; Leather
- G01N33/442—Resins; Plastics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention provides a foaming quality detection device for heat-preservation foam, which comprises a sampling container, a distance measuring instrument and a data processing device, wherein the sampling container is provided with a filling port, the upper end of the sampling container is provided with an opening, the distance measuring instrument is arranged above the sampling container and is configured to measure the height of a foaming material, the data processing device is configured to obtain the height of the foaming material measured by the distance measuring instrument and determine the growth state of the foaming material according to the height of the foaming material. Therefore, the intelligent detection of the foam foaming quality is realized, and the efficiency and the accuracy of the detection of the foam foaming quality are improved.
Description
Technical Field
The invention relates to the technical field of heat insulation materials, in particular to a foaming quality detection device for heat insulation foam.
Background
The heat insulating foam as the heat insulating material for refrigerating apparatus is polyurethane rigid foam, and the forming process of the foam generally includes the stages of mixing, emulsifying, raising, gelling and the like. Specifically, the white material and the black material are automatically mixed in a mixing head of a foaming agent or manually mixed in a beaker to generate a polymerization reaction, foaming gas begins to form and expand into fine bubbles, so that the foaming mixture is milky, and the foaming mixture begins to expand and the foam volume gradually increases along with the increase of the foaming gas; and then, the polymerization reaction is continued until the foaming material is completely gelatinized, and finally the foam plastic is formed.
The existing white material is generally polyether polyol, the black material is generally isocyanate, the foaming agent is carbon dioxide, trichlorofluoromethane, cyclopentane and the like, the time from the beginning of mixing the black material and the white material is taken as a starting point until the foaming material begins to gel and draw, and the time period is the gelling time of the foaming material. There is a certain difference in the reaction characteristics of different materials.
The parameters of the foamed plastic, such as density, gelling time and the like, reflecting the growth state of the foamed material directly reflect the foaming quality of the foamed material, and the foaming quality of the foamed material directly influences the heat insulation performance of the refrigerator, so that the foaming quality of the foamed material needs to be detected when a new material or a sample is tried. At present, the quality of the foaming material is generally detected manually, for example, an inspector detects the gelling time and the foam density of the foaming material respectively, the time consumption is long, the workload is high, long-term tracking is required, the process capability analysis is additionally carried out, the operation is complex and tedious, and interference of human factors exists to influence the measurement result.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a device for detecting the foaming quality of an insulating foam, which overcomes or at least partially solves the above problems.
A further object of the present invention is to automatically detect the growth state of the foamed material and simplify the detection process.
The invention provides a foaming quality detection device of heat preservation foam, which comprises:
the sampling container is provided with a filling port so as to fill foaming materials into the sampling container, and the upper end of the sampling container is provided with an opening;
the distance measuring instrument is arranged above the sampling container and is configured to measure the height of the foaming material;
and the data processing device is configured to acquire the height of the foaming material measured by the distance measuring instrument and determine the growth state of the foaming material according to the height of the foaming material.
Optionally, the detection apparatus further comprises:
a weight detector configured to measure a weight of the foam in the sampling container after foaming is finished;
the growth state of the foaming material comprises the density of the foam;
the data processing device is also configured to calculate the volume of the foam based on the height of the foaming material and the shape and size of the sampling container, and calculate the density of the foam based on the volume of the foam and the weight of the foam.
Optionally, the growth state of the foaming material further comprises a growth curve of the foaming material;
the data processing device is also configured to record the change condition of the height of the foaming material along with time so as to draw a growth curve, and meanwhile, the data processing device has the automatic analysis function of process control capacity and outputs a control chart containing parameters such as the gelling time, the foam density and the like of the foaming material detected and obtained at different time points.
Optionally, the growth state of the foaming material further comprises the gelling time of the foaming material;
the data processing device is also configured to record the time when the foaming material is injected into the sampling container and the time when the height of the foaming material rises to a preset height so as to calculate the gelling time.
Optionally, the distance measuring instrument has a detection surface located right above the opening and facing the opening;
a plurality of distance measuring probes are uniformly distributed on the detection surface, and the detection ranges of the plurality of distance measuring probes cover the opening of the sampling container.
Optionally, the ranging probe is a laser ranging probe.
Optionally, the injection port is formed at the bottom end or the top end of the sidewall of the sampling vessel.
Optionally, the sampling vessel is cylindrical.
Optionally, the detection apparatus further comprises:
the bottom of the movable cabinet is provided with a roller, and the movable cabinet is provided with a bearing table and a bracket arranged on the bearing table;
the weight detector is placed on the bearing table, the sampling container is placed on the weight detector, and the distance measuring instrument is arranged on the support.
Optionally, the data processing apparatus is provided in a mobile cabinet.
The device for detecting the foaming quality of the heat-preservation foam, provided by the invention, has the advantages that the automatic detection of the foaming quality of the foam is realized and the efficiency and the accuracy of the detection of the foaming quality are improved due to the special design of the sampling container, the distance measuring instrument and the data processing device.
Furthermore, in the device for detecting the foaming quality of the heat-insulating foam, the data processing device can determine the growth curve of the foaming material and the gelling time of the foaming material according to the height of the foaming material so as to reflect the foaming quality of the foam more directly.
Furthermore, in the device for detecting the foaming quality of the heat-insulating foam, the overall density of the foam capable of directly reflecting the foaming quality is determined by additionally arranging the weight detector and combining the height of the foaming material detected by the distance measuring instrument. In addition, the accuracy of foam overall density calculation is improved by adopting a distance measuring instrument with a plurality of distance measuring probes.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic view of a detection device according to one embodiment of the present invention;
FIG. 2 is a schematic view of a distance measuring instrument of a detection device according to one embodiment of the present invention;
FIG. 3 is a schematic view of a sampling vessel and foam of a detection device according to one embodiment of the present invention; and
FIG. 4 is a graph showing the growth of a foam injected into a sampling vessel according to one embodiment of the present invention.
Detailed Description
The embodiment innovatively provides a device capable of automatically detecting the foaming quality of the foam 200, so that the intelligent detection of the foaming quality is realized, and the efficiency and the accuracy of the detection of the foaming quality are improved.
Specifically, as shown in fig. 1, fig. 1 is a schematic view of a foaming quality detection apparatus 100 of an insulation foam 200 according to an embodiment of the present invention. The foaming quality detecting apparatus 100 includes a sampling vessel 101, a distance measuring instrument 103, and a data processing apparatus 105. The sampling container 101 has a filling port 101a, for example, the filling port 101a is formed at the bottom end or the top end of the side wall of the sampling container 101, the filling port 101a shown in fig. 1 is located at the bottom end of the side wall of the sampling container 101, and a foaming machine (not shown) fills the foaming material into the sampling container 101 through the filling port 101 a. The upper end of the sampling container 101 has an opening 101b, and the distance measuring instrument 103 is disposed above the sampling container 101 for measuring the height of the foaming material during the foaming and expansion process. The data processing device 105 can acquire the height of the foaming material measured by the distance measuring instrument 103, and can determine the growth state of the foaming material according to the height of the foaming material.
The growth state of the foaming material may include the density of the foaming material, the growth curve of the foaming material, the gel time of the foaming material, and the like.
The sampling container 101 is made of a hard material and is not deformable, so that the sampling container 101 is prevented from being deformed due to the foaming expansion of the foaming material to extrude the sampling container 101, and the accuracy of the detection of the growth state of the foaming material is influenced.
The sampling vessel 101 is designed to be removable, for example, at least one side cover of the sampling vessel 101 can be opened to facilitate removal of the insulating foam 200. The sampling container 101 may be cylindrical in shape, and the size of the sampling container 101 is matched according to the amount of the injected material.
Fig. 2 is a schematic diagram of a distance measuring instrument 103 of the detection device 100 according to one embodiment of the present invention. The distance measuring instrument 103 is provided with a detection surface 103a which is positioned right above the opening 101b of the sampling container 101 and is opposite to the opening 101b, a plurality of distance measuring probes 103b are uniformly distributed on the detection surface 103a, and the detection range of all the distance measuring probes is required to cover the opening 101b of the sampling container 101. The distance measuring probe can be a laser distance measuring probe.
The opening 101b can be circular, correspondingly, the detection surface 103a of the distance measuring instrument 103 is also circular, and the plurality of distance measuring probes 103b can be uniformly distributed in the annular area of the detection surface 103a, so that the detection range of the distance measuring probes 103b can completely cover the opening 101b of the sampling container 101, the height values of a plurality of areas at the upper end of the foaming material can be detected, and the growth state of the foaming material can be determined more truly and accurately. Through multi-point detection, the distance measuring instrument 103 can capture the irregular foam growth state to obtain a more accurate detection result.
In some embodiments, as shown in fig. 1, the detecting device 100 further includes a weight detector 102, the weight detector 102 may be an electronic scale, a weight sensor, or the like, the weight detector 102 is configured to measure the weight of the foam 200 in the sampling container 101 after the foaming process is finished, and the data processing device 105 may be further configured to calculate the volume of the foam 200 according to the height of the foaming material and the shape and size of the sampling container 101, and calculate the density of the foam 200 according to the volume of the foam 200 and the weight of the foam 200.
If the sampling vessel 101 is cylindrical, the data processing device 105 can calculate the volume of the foam 200 according to the height of the foaming material and the diameter of the sampling vessel 101, and obtain the overall density of the foam 200 according to the weight of the foam 200 measured by the weight detector 102.
Fig. 3 shows a schematic view of the sampling vessel 101 and the foam 200, and after the foaming of the foam is completed, the top end of the foam 200 has a theoretically elliptical structure as shown in fig. 2, and in fact, after the foaming of the foam is completed, the top end may have an irregular shape. The plurality of distance measuring probes 103b can measure the heights of different areas at the top end of the foam 200 to obtain a plurality of height values, the data processing device 105 can use the average value of the height values as the average value of the height of the foam, and then the overall density of the foam 200 is calculated by combining the shape and the size of the sampling container 101 and the weight of the foaming material, so that the accuracy of the overall density of the foam 200 is improved.
The data processing device 105 may also be configured to record the height of the foaming material changing with time to draw a growth curve, as shown in fig. 3, fig. 3 shows a curve of the height h of the foaming material changing with time t during the foaming process, that is, the growth curve of the foaming material, where h1 is the final height of the foam 200 after the foaming is completed, and h2 is the height of the foam 200 corresponding to the time point t 2. The height value corresponding to each time point may be the average height value.
The data processing device 105 is further configured to record the time when the foaming material is injected into the sampling container and the time when the height of the foaming material rises to a preset height, and the difference between the two is the gelling time. The data processing device 105 can communicate with a foaming machine for injecting the material into the sampling container 101, and the time is measured when the foaming machine starts to inject the material, wherein the time t2 is the gelling time of the foaming material, and the time h1 is the preset height.
The preset height is a value written in advance in the control program of the data processing device 105. The experimenter analyzes the big data of the actual manual measurement, determines the relation between the rising height of the foaming material and the final height, and further determines the preset height corresponding to the gelling time.
As shown in FIG. 1, the detecting device 100 may further include a movable cabinet 104, the bottom of which is provided with a roller 107, and a support 106 is provided on the carrying platform of the movable cabinet. The weight detector 102 is placed on the bearing table, and the sampling container 101 is placed on the weight detector 102, so that the detection device 100 is more flexible, and the injection operation of foaming machines at different positions is facilitated.
The distance measuring instrument 103 is fixed by the bracket 106, and the fixed position of the distance measuring instrument 103 needs to ensure that the distance measuring instrument is positioned right above the sampling container 101 and at a position where the foaming material cannot reach after expanding. The data processing device 105, power supply components, and the like are provided in the mobile cabinet 104, so that the respective components of the entire detection device 100 are more concentrated.
The mobile cabinet 104 may also have a display screen (not shown) that displays the growth status of the foam. The growth state of the foamed material processed by the data processing device 105, such as the density of the foam, the growth curve of the foamed material, the gel time of the foamed material, and the like, can be directly displayed on a display screen, and of course, can also be transmitted to a terminal connected thereto, such as a computer of an experimenter, a mobile phone, and the like.
The data processing device 105 may also have a Process Capability Index (CPK) analysis function, and perform CPK analysis on each data obtained by performing multiple quality detections at different time points, and output a control chart containing parameters such as gel time, foam density and the like of the foamed material obtained by the detection at different time points, so as to directly reflect the foaming quality of the foamed material, and send the control chart to relevant experimenters for timely deviation correction when the data are abnormal.
In order to more clearly understand the detecting device 100 of the present embodiment, the detecting process of the detecting device 100 of one embodiment is described as follows.
Step S1, the foaming machine injects foaming material into the sampling container 101 through the injection port 101a, the data processing device 105 records the time of starting injecting material of the foaming machine as initial time, and simultaneously, the distance measuring instrument 103 is started;
step S2, the data processing device 105 draws a growth curve from the initial time to the foaming end of the foaming material according to the height detected by the distance measuring instrument 103 in the foaming process of the foaming material, and stores the growth curve;
step S3, the weight detector 102 detects the weight of the foam 200 after the foaming is finished, the data processing device 105 calculates the volume of the foam 200 according to the height of the foam 200 after the foaming is finished and the shape and size of the sampling container 101, calculates the density of the foam according to the volume of the foam 200 and the weight of the foam 200 detected by the weight detector 102, and stores the density;
step S4, taking down the foam 200 after foaming, and repeating the steps S1 to S3 to perform multiple quality tests on the foaming material at different time points;
and step S5, reading the data stored in each quality detection, performing CPK capability analysis, outputting a control chart, and sending the control chart to relevant experimenters so that the experimenters can intuitively know the foaming quality of the detected foaming material.
The foaming quality detection device 100 of the heat preservation foam 200, the sampling container 101, the distance measuring instrument 103 and the data processing device 105 are specially designed, so that the automatic detection of the foaming quality of the foam 200 is realized, and the efficiency and the accuracy of the foaming quality detection are improved.
Further, in the foam quality detecting apparatus 100 of the thermal insulation foam 200 according to the present invention, the data processing device 105 can determine the growth curve of the foam material and the gel time of the foam material according to the height of the foam material, so as to reflect the foam quality of the foam 200 more directly.
Furthermore, in the foam quality detection apparatus 100 for the thermal insulation foam 200 according to the present invention, the weight detector 102 is additionally provided, and the height of the foam material detected by the distance measuring instrument 103 is combined, so that the overall density of the foam 200 that can directly reflect the foam quality is determined. In addition, by employing a ranging instrument 103 having a plurality of ranging probes 103b, the accuracy of the overall density calculation of the foam 200 is improved.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A foaming quality detection device of thermal insulation foam comprises:
a sampling container which is provided with a filling port so as to fill foaming materials into the sampling container, and the upper end of the sampling container is provided with an opening;
a distance measuring instrument disposed above the sampling container and configured to measure a height of the foamed material;
and the data processing device is configured to acquire the height of the foaming material measured by the distance measuring instrument and determine the growth state of the foaming material according to the height of the foaming material.
2. The detection apparatus of claim 1, further comprising:
a weight detector configured to measure a weight of the foam in the sampling container after foaming is completed;
the growth state of the foaming material comprises the density of the foam;
the data processing device is further configured to calculate a volume of the foam based on a height of the foaming material and a shape size of the sampling container, and calculate a density of the foam based on the volume of the foam and a weight of the foam.
3. The detection device of claim 1, wherein
The growth state of the foaming material also comprises a growth curve of the foaming material;
the data processing device is also configured to record the change of the height of the foaming material along with the time so as to draw the growth curve.
4. The detection device of claim 3, wherein
The growth state of the foaming material also comprises the gelling time of the foaming material;
the data processing device is also configured to record the time when the foaming material is injected into the sampling container and the time when the height of the foaming material rises to a preset height so as to calculate the gelling time.
5. The detection device of claim 1, wherein
The distance measuring instrument is provided with a detection surface which is positioned right above the opening and is opposite to the opening;
a plurality of distance measuring probes are uniformly distributed on the detection surface, and the detection ranges of the plurality of distance measuring probes cover the opening of the sampling container.
6. The detection device of claim 5, wherein
The distance measuring probe is a laser distance measuring probe.
7. The detection device of claim 1, wherein
The injection port is formed at the bottom end or the top end of the side wall of the sampling container.
8. The detection device of claim 1, wherein
The sampling container is cylindrical.
9. The detection apparatus of claim 2, further comprising:
the bottom of the movable cabinet is provided with a roller, and the movable cabinet is provided with a bearing table and a bracket arranged on the bearing table;
the weight detector is placed on the bearing table, the sampling container is placed on the weight detector, and the distance measuring instrument is arranged on the support.
10. The detection device of claim 9, wherein
The data processing device is arranged in the mobile cabinet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910182069.3A CN111679064A (en) | 2019-03-11 | 2019-03-11 | Foaming quality detection device of heat preservation foam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910182069.3A CN111679064A (en) | 2019-03-11 | 2019-03-11 | Foaming quality detection device of heat preservation foam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114280231A (en) * | 2021-11-24 | 2022-04-05 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Portable device and method for rapidly testing working performance of foaming material |
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Application publication date: 20200918 |
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| RJ01 | Rejection of invention patent application after publication |