CN212111224U - Continuous tester for drop melting point - Google Patents
Continuous tester for drop melting point Download PDFInfo
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- CN212111224U CN212111224U CN202020688087.7U CN202020688087U CN212111224U CN 212111224 U CN212111224 U CN 212111224U CN 202020688087 U CN202020688087 U CN 202020688087U CN 212111224 U CN212111224 U CN 212111224U
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- melting point
- temperature sensor
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- temperature
- glass temperature
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- 238000002844 melting Methods 0.000 title claims abstract description 32
- 230000008018 melting Effects 0.000 title claims abstract description 32
- 239000011521 glass Substances 0.000 claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 238000005259 measurement Methods 0.000 claims abstract description 25
- 239000004065 semiconductor Substances 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 21
- 239000000523 sample Substances 0.000 description 53
- 239000012169 petroleum derived wax Substances 0.000 description 5
- 235000019381 petroleum wax Nutrition 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 235000019808 microcrystalline wax Nutrition 0.000 description 2
- 239000004200 microcrystalline wax Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 239000012164 animal wax Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000012165 plant wax Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model discloses a drip melting point continuous measurement appearance, it includes: a sample sleeve which is a transparent tube; the glass temperature sensor is detachably arranged in the sample sleeve in a penetrating way; the temperature control bath box is used for accommodating the sample sleeve and is provided with a semiconductor heating and refrigerating sheet; and the detection assembly comprises a light source and a light signal receiver which are oppositely arranged on two sides of the sample sleeve, and a light path between the light source and the light signal receiver passes through the lower part of the bottom end of the glass temperature sensor. The utility model realizes continuous measurement through the semiconductor heating and refrigerating sheet, can be rapidly cooled after one-time measurement is completed, meets the temperature requirement of the next test, and avoids long-time waiting for bath liquid to be cooled, thereby obviously improving the test efficiency; the optical signal is used as a detection component, the first drop of the sample is automatically judged to drop from the bottom end of the glass temperature sensor, so that the drop melting point of the sample is determined, the hysteresis of manual operation is avoided, and the accuracy is higher.
Description
Technical Field
The utility model relates to a petroleum product detects technical field, in particular to drip melting point continuous measurement appearance.
Background
The drop melting point is one of important quality indexes of petroleum wax, particularly microcrystalline wax, and the drop melting point is an important influence factor influencing product transportation, deep processing and blending and is the basis for dividing grades of microcrystalline wax products.
The main basis for the determination of the melting points of petroleum wax and petroleum grease droplets is the standard method GB/T8026-2014. This method requires dipping the cooled thermometer into the sample so that the sample adheres to the two thermometer mercury bulbs. The thermometers with the samples are placed in test tubes, the water bath is used for heating until the samples are molten, the first drop of the samples drops from a mercury ball of each thermometer, and the average value of the dropping temperature is the dropping melting point of the samples.
At present, for the measurement of the melting point of the drop, a special measuring instrument is lacked, the measurement is usually carried out manually by an operator, the test accuracy cannot be guaranteed, and the measurement efficiency is low. In addition, after each test is finished, the bath heating bath solution needs a long time to be cooled to the initial temperature required by the next test, so that the test cannot be continuously carried out, and the time is consumed.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a drip melting point continuous measurement appearance to improve the accuracy of product such as petroleum wax, petroleum fat drip melting point survey among the prior art, and realize the continuous measurement, improve test efficiency.
Another object of the present invention is to provide a continuous measuring apparatus for melting point, which reduces the labor cost for measuring the melting point of petroleum wax, petroleum grease, etc. in the prior art.
In order to achieve the above object, the present invention provides a continuous measuring apparatus for melting point, which comprises: a sample sleeve which is a transparent tube; the glass temperature sensor is detachably arranged in the sample sleeve in a penetrating way; the temperature control bath box is used for accommodating the sample sleeve and is provided with a semiconductor heating and refrigerating sheet; and the detection assembly comprises a light source and a light signal receiver which are oppositely arranged on two sides of the sample sleeve, and a light path between the light source and the light signal receiver passes through the lower part of the bottom end of the glass temperature sensor.
Further, in the above technical solution, the continuous measuring instrument for the dropping melting point further comprises: and the control unit is in communication connection with the glass temperature sensor, the temperature control bath box and the detection assembly.
Further, in the above technical scheme, when the semiconductor heating and cooling plate is in a heating state and the optical signal received by the optical signal receiver changes from blocking to passing, the control unit records the temperature of the glass temperature sensor and triggers a first interlocking action; when the semiconductor heating and refrigerating piece is in a refrigerating state and the temperature of the temperature control bath box is reduced to a preset temperature, the control unit triggers a second interlocking action.
Further, in the above technical scheme, the first interlocking action includes switching the semiconductor heating and cooling plate to a cooling state or stopping heating; the second interlocking action comprises switching the semiconductor heating and cooling piece to a heating state.
Further, in the above technical solution, the first interlocking action includes sending a measurement completion signal; the second linkage action includes transmitting a measurement start signal.
Further, in the above technical scheme, the temperature control bath box is heated at a constant speed in a heating state.
Further, among the above-mentioned technical scheme, the distance of the light path between light source and the light signal receiver and glass temperature sensor's bottom is 2~4.5 mm.
Further, in the above technical scheme, the bath liquid of the temperature control bath box is water or silicone oil.
Further, in the above technical scheme, the temperature control bath box is provided with a cover plate, the cover plate is provided with a fixing hole, and the sample sleeve is inserted into the temperature control bath box through the fixing hole; the sample sleeve is provided with a cover plug, and the glass temperature sensor is arranged on the cover plug in a penetrating mode.
Further, in the above technical scheme, the distance between the bottom end of the glass temperature sensor and the bottom of the sample sleeve is 15 mm.
Further, in the above technical scheme, the control unit is provided with a display screen and an adjusting button.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the semiconductor heating and refrigerating sheet is used for realizing continuous measurement, and after one-time measurement is finished, the temperature can be quickly reduced to meet the temperature requirement of the next test. The long-time waiting for the bath liquid to cool is avoided, so that the test efficiency is obviously improved.
2. The optical signal is used as a detection component, the first drop of the sample is automatically judged to drop from the bottom end of the glass temperature sensor, so that the drop melting point of the sample is determined, the hysteresis of manual operation is avoided, and the accuracy is higher. The sample is attached to the surface of the probe at the bottom end of the glass temperature sensor, and when the first sample drops, the glass temperature sensor can be rapidly heated, so that the accuracy and repeatability of a test result can be seriously influenced if the judgment of a test endpoint lags.
3. The control unit can realize automatic temperature control and record test results, is simple to operate and does not need continuous observation of operators; and when the measurement is completed or the preset temperature is reached, the state can be automatically switched or the heating can be stopped, so that the energy consumption is saved and the efficiency is improved.
4. The control unit is provided with a display screen, an adjusting button and the like, so that the operation is easier, and the data setting and reading are more convenient.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means more comprehensible, and to make the above and other objects, technical features, and advantages of the present invention easier to understand, one or more preferred embodiments are listed below, and the following detailed description is given with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic view of a continuous measuring apparatus for a melt dropping point according to an embodiment of the present invention.
Description of the main reference numerals:
10-temperature control bath box, 11-cover plate, 12-bath temperature sensor, 20-sample sleeve, 21-cover plug, 30-glass temperature sensor, 41-light source, 42-optical signal receiver, 50-control unit, 51-display screen and 52-adjusting button.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.
As shown in fig. 1, a temperature control bath box 10 of a continuous measuring apparatus for a dropping point according to an embodiment of the present invention contains a sample sleeve 20, and a glass temperature sensor 30 is detachably inserted into the sample sleeve 20. The probe of the glass temperature sensor 30 is located at its bottom end. Sample cannula 20 is a transparent tube, and exemplary sample cannula 20 is a transparent glass tube. The detection assembly includes a light source 41 and a light signal receiver 42 disposed opposite each other on both sides of the sample sleeve 20, and a light path generated by the light source 41 can pass below the bottom end of the glass temperature sensor 30. The first drop of the sample is automatically determined by the change of the optical signal between the light source 41 and the optical signal receiver 42, and the drop melting point of the sample is determined. The temperature-controlled bath box 10 is provided with semiconductor heating/cooling sheets (not shown in the figure), and exemplarily, the semiconductor heating/cooling sheets may be disposed on the inner wall of the temperature-controlled bath box 10, but the present invention is not limited thereto.
Further, in one or more exemplary embodiments of the present invention, the control unit 50 is in communication with the glass temperature sensor 30, the temperature controlled bath 10 and the detection assembly, and the continuous droplet melting point measuring instrument can be automatically adjusted and controlled by the control unit 50.
Further, in one or more exemplary embodiments of the present invention, when the semiconductor heating/cooling sheet is in a heating state, the sample at the bottom of the glass temperature sensor 30 is heated by the hot bath, and the first drop of the sample drops off from the bottom of the glass temperature sensor 30. The first drop of sample firstly blocks the light path generated by the light source 41, and after the first drop of sample passes through, the light path generated by the light source 41 is blocked to pass through and reach the optical signal receiver 42 at the opposite side. When the optical signal receiver 42 receives the signal of the light source 41, the control unit 50 records the temperature of the glass temperature sensor 30 and triggers the first interlock action. In one or more exemplary embodiments of the present invention, the first interlock action is used to switch the semiconductor heating/cooling plate to the cooling state for the next test, and if all the tests are completed, the first interlock action may also be used to stop heating. In the first interlock operation, the control unit 50 may trigger a measurement completion signal to indicate completion of one or all of the tests.
Further, in one or more exemplary embodiments of the present invention, when the semiconductor heating/cooling plate is in a cooling state and the temperature of the temperature-controlled bath box 10 is lowered to a preset temperature, the control unit 50 triggers the second interlocking action. In one or more exemplary embodiments of the present invention, the second interlock operation includes switching the semiconductor heating/cooling fin to the heating state, and may further include transmitting a measurement start signal.
Further, in one or more exemplary embodiments of the present invention, the distance m between the optical path between the light source 41 and the optical signal receiver 42 and the bottom end of the glass temperature sensor 30 is 2 to 4.5 mm. After sampling according to a standard method, the distance n between the bottom end of the sample and the bottom end of the glass temperature sensor 30 is 2-2.5 mm, the sample attached after temperature rise gradually forms a drop shape at the bottom end of the glass temperature sensor 30, the distance between the bottom end of the sample and the bottom end of the glass temperature sensor 30 is 3.5-4.5 mm, the residual sample is not gathered immediately after the first drop of the sample drops, the distance between the bottom end of the residual sample and the bottom end of the glass temperature sensor 30 is about 0.5mm, the distance is increased to about 1mm after a period of time, and finally the distance between the bottom end of the residual sample and the bottom end of the glass temperature sensor 30 is still less. In the present invention, there may be two kinds of variation conditions of the optical signal received by the optical signal receiver 42, in the first case, the distance m is less than the distance n, the optical path between the light source 41 and the optical signal receiver 42 is blocked before the sample drops, and the optical signal passes after the first sample drops, so as to determine the end point of the test; in the second case, the distance m is greater than the distance n, the optical signal between the light source 41 and the optical signal receiver 42 can pass before the sample starts to drop, the optical signal is blocked during the dropping of the first sample, and the optical signal passes after the first sample drops, so as to determine the end point of the test.
Further, in one or more exemplary embodiments of the present invention, the control unit 50 can control the heating state of the semiconductor heating/cooling plate by presetting parameters. The temperature control bath box 10 can be further provided with a bath temperature sensor 12, the control unit 50 is in communication connection with the bath temperature sensor 12, and monitoring of the temperature in the temperature control bath box 10 is implemented to adjust the temperature rise speed of the temperature control bath box 10. Further, in one or more exemplary embodiments of the present invention, the temperature controlled bath box 10 is heated at a constant speed. The control unit 50 controls the temperature of the temperature-controlled bath box 10, and the temperature-raising rate may be set to be stepwise in the heating state, for example, the bath temperature is raised to 38 ℃ at a constant speed of about 2 ℃/min, and then raised at a constant speed of about 1 ℃/min. Further, in one or more exemplary embodiments of the present invention, the bath liquid of the temperature controlled bath cabinet 10 may be water or silicone oil. For example, in order to make the temperature in the temperature-controlled bath box 10 uniform, the temperature-controlled bath box 10 may be further provided with a stirring section (not shown in the drawings). It should be understood that the temperature control bath box can also adopt an air bath, and the present invention is not limited thereto.
Further, in one or more exemplary embodiments of the present invention, the temperature control bath box 10 is provided with a cover plate 11, the cover plate 11 is provided with a fixing hole, and the sample sleeve 20 is exemplarily inserted into the temperature control bath box 10 through the fixing hole. Other structures may be installed in the temperature-controlled bath box 10 through fixing holes, such as the bath temperature sensor 12. Further, in one or more exemplary embodiments of the present invention, the sample sleeve 20 is provided with a cap plug 21, and the glass temperature sensor 30 is provided to penetrate the cap plug 21. Illustratively, the lid plug 21 is notched at its edge to allow air circulation; the cap stopper 21 may be a glass stopper, a cork stopper or a rubber stopper, but the present invention is not limited thereto. Illustratively, when the glass temperature sensor 30 is detached, the lid plug 21 is removed together; after sampling, the glass temperature sensor 30 of the prepared sample is fixed in the sample well 20 by the cap plug 21. Further, in one or more exemplary embodiments of the present invention, the bottom end of the glass temperature sensor 30 is about 15mm from the bottom of the sample sleeve 20.
Further, in one or more exemplary embodiments of the present invention, the control unit 50 may be provided with a display screen 51 and an adjustment button 52. The display screen 51 can show bath temperature, sample temperature, bath temperature rate of rise etc., and the adjustment button 52 can be used for setting or adjusting bath temperature, rate of rise etc., the utility model discloses not use this as the limit.
Referring to fig. 1, in one or more embodiments of the present invention, the sample sleeve 20 and the glass temperature sensor 30 are provided in two sets. Adopt the utility model discloses a test process of dropping melting point continuous measurement appearance is as follows:
bath liquid is added into the temperature control bath box 10, and two sample sleeves 20 are immersed in the temperature control bath box 10 through fixing holes on the cover plate 11. The temperature control program is preset by the control unit 50. The samples were prepared according to the method in GB/T8026-. When the detection component is turned on, the light path generated by the light source 41 is blocked by the sample at the bottom end of the glass temperature sensor 30 and cannot reach the optical signal receiver 42. According to a preset temperature control program, the bath temperature is uniformly increased to 38 ℃ at a speed of about 2 ℃/min, and then is uniformly increased at a speed of about 1 ℃/min until the first sample at the bottom end of the glass temperature sensor 30 drops, a light path generated by a light source 41 of the detection assembly can pass, a signal is received by an optical signal receiver 42, and the control unit 50 automatically records the temperature of the glass temperature sensor 30 at the moment. When the first drop of sample has dropped from both the two glass temperature sensors 30, the control unit 50 automatically switches the semiconductor heating/cooling plate to the cooling state. In the refrigeration state, the temperature control bath box 10 is rapidly cooled until the temperature is reduced to the preset temperature of 16 ℃, the control unit 50 automatically switches the semiconductor heating and refrigerating sheet to the heating state or the waiting state, and the next measurement is started to realize continuous measurement. When all the test measurements are completed, the control unit 50 triggers a measurement completion signal to indicate the completion of all the tests. For each measurement, the control unit 50 may automatically calculate an average value of the temperature at which the first sample of the two glass temperature sensors 30 is dropped, and display the result as the melting point of the sample on the display screen 51.
The utility model discloses a sample, accuse temperature and experimental terminal point judgement of drip melting point continuous measurement appearance can accord with GB/T8026 supplementarian 2014 requirement completely, extensively are applicable to the drip melting point of products such as petroleum wax, petroleum fat, synthetic wax and animal and plant wax and survey, the utility model discloses do not regard this as the limit.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.
Claims (10)
1. A continuous measuring apparatus for a dropping point, comprising:
a sample sleeve which is a transparent tube;
the glass temperature sensor is detachably arranged in the sample sleeve in a penetrating way;
the temperature control bath box is used for accommodating the sample sleeve and is provided with a semiconductor heating and refrigerating sheet; and
and the detection assembly comprises a light source and an optical signal receiver which are oppositely arranged on two sides of the sample sleeve, and a light path between the light source and the optical signal receiver passes through the lower part of the bottom end of the glass temperature sensor.
2. The continuous droplet melting point measuring instrument according to claim 1, further comprising:
and the control unit is in communication connection with the glass temperature sensor, the temperature control bath box and the detection assembly.
3. The continuous measuring instrument of the drop melting point of claim 2, wherein when the semiconductor heating refrigerating sheet is in a heating state and the optical signal received by the optical signal receiver changes from blocking to passing, the control unit records the temperature of the glass temperature sensor and triggers a first interlocking action; when the semiconductor heating and refrigerating piece is in a refrigerating state and the temperature of the temperature control bath box is reduced to a preset temperature, the control unit triggers a second interlocking action.
4. The continuous measuring instrument of the dropping melting point according to claim 3, wherein the first interlocking action comprises switching the semiconductor heating/cooling plate to a cooling state or stopping heating; the second interlocking action comprises switching the semiconductor heating and refrigerating piece to a heating state.
5. The continuous droplet melting point measuring instrument according to claim 4, wherein the first interlocking operation includes sending a measurement completion signal; the second linkage action includes transmitting a measurement start signal.
6. The continuous measuring instrument of the dropping melting point according to claim 3, wherein the temperature control bath box is heated at a constant speed in the heating state.
7. The continuous droplet melting point measuring instrument according to claim 2, wherein the distance between the optical path between the light source and the optical signal receiver and the bottom end of the glass temperature sensor is 2-4.5 mm.
8. The continuous measuring apparatus of the dropping melting point according to claim 2, wherein the bath liquid of the temperature-controlled bath cabinet is water or silicone oil.
9. The continuous measuring instrument for the melting point of the dropwise added material according to claim 2, wherein the temperature control bath box is provided with a cover plate, the cover plate is provided with a fixing hole, and the sample sleeve is inserted into the temperature control bath box through the fixing hole; the sample sleeve is provided with a cover plug, and the glass temperature sensor penetrates through the cover plug; the distance between the bottom end of the glass temperature sensor and the bottom of the sample sleeve is 15 mm.
10. The continuous droplet melting point measuring instrument according to claim 2, wherein the control unit is provided with a display screen and an adjusting button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020688087.7U CN212111224U (en) | 2020-04-29 | 2020-04-29 | Continuous tester for drop melting point |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020688087.7U CN212111224U (en) | 2020-04-29 | 2020-04-29 | Continuous tester for drop melting point |
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| CN212111224U true CN212111224U (en) | 2020-12-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798639A (en) * | 2021-02-23 | 2021-05-14 | 广州港湾工程质量检测有限公司 | Frass brittle point instrument and test method thereof |
| CN114167912A (en) * | 2021-12-07 | 2022-03-11 | 苏州华星光电技术有限公司 | Temperature control device and service life testing method of display panel |
-
2020
- 2020-04-29 CN CN202020688087.7U patent/CN212111224U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798639A (en) * | 2021-02-23 | 2021-05-14 | 广州港湾工程质量检测有限公司 | Frass brittle point instrument and test method thereof |
| CN114167912A (en) * | 2021-12-07 | 2022-03-11 | 苏州华星光电技术有限公司 | Temperature control device and service life testing method of display panel |
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Effective date of registration: 20240515 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Country or region after: China Patentee after: Sinopec (Dalian) Petrochemical Research Institute Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Country or region before: China Patentee before: DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC Corp. |
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