CN115818930B - Device and method for monitoring thermal expansion of clarification section of platinum channel - Google Patents
Device and method for monitoring thermal expansion of clarification section of platinum channel Download PDFInfo
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- CN115818930B CN115818930B CN202211589370.4A CN202211589370A CN115818930B CN 115818930 B CN115818930 B CN 115818930B CN 202211589370 A CN202211589370 A CN 202211589370A CN 115818930 B CN115818930 B CN 115818930B
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- platinum channel
- thermal expansion
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 229910052697 platinum Inorganic materials 0.000 title claims abstract description 41
- 238000005352 clarification Methods 0.000 title claims abstract description 32
- 238000012544 monitoring process Methods 0.000 title claims description 23
- 238000000034 method Methods 0.000 title claims description 21
- 238000012806 monitoring device Methods 0.000 claims abstract description 9
- 238000000605 extraction Methods 0.000 claims description 30
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000010963 304 stainless steel Substances 0.000 claims description 5
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a platinum channel clarification section thermal expansion monitoring device which comprises two clamping surfaces, a clamping structure and an extension rod, wherein the two clamping surfaces are arranged in parallel, the clamping structure is arranged between the two clamping surfaces, the two clamping surfaces are connected with one end of the extension rod, the distance between the two clamping surfaces is the same as the thickness of a flange body, and one end of the extension rod is connected with an expansion meter. In the aspect of temperature rise expansion management of a platinum channel clarification section, the expansion tracking of each clarification section is more accurate by designing a flange position mark led out from the side part. And the side dilatometer is combined to monitor the dilatometer, so that the problems are effectively solved.
Description
Technical Field
The invention relates to the technical field of substrate glass manufacturing, in particular to a device and a method for monitoring thermal expansion of a platinum channel clarification section.
Background
The platinum channel is one of key equipment in the production of the substrate glass, the manufacturing cost is high, the platinum channel cannot be reused, the cooling installation requirements for the platinum channel are very high, the position relation between the platinum channel and a tank furnace in a cold state and the butt joint relation between the tank furnace and the forming after the thermal expansion is finished are determined, the thermal expansion management for the platinum channel is one of important items in the heating process of the substrate glass equipment, and as the total length of the platinum channel reaches tens of meters, the structures and functions of all sections are different, and the expansion management for the platinum channel also needs to be comprehensively considered by combining with the system structure.
For the clarification section, the temperature is highest in the operation process of the platinum channel and the life reliability challenges the area most, so that in the heating process of the clarification section, expansion of each section is ensured to be in a free state, local stress or overall unbalanced stress cannot occur, although the clarification pipe adopts a corrugated pipe structure in design, the effect on buffering the expansion amount is certain, the effect on the flange root is not completely covered, the flange root of the clarification section is the area with the weakest life of the clarification section, and the flange root of the clarification section is damaged from the area generally after a few years of operation.
Because the root area of the clarifying section is only left to be exposed after the construction is finished, and the main section area with a large area is wrapped by filling materials and various refractory materials, the expansion tracking of the area is mainly based on the displacement of the flange of each section, as shown in figure 1, and an expansion meter is arranged on a wiring line at the upper part of the flange, and the actual displacement of each section of the clarifying section is judged by measuring the displacement of the wiring line, the method has a certain problem for a long time that the upper wiring line hangs at the upper part of the upper wiring line due to dead weight so as to prevent the wiring line from inclining due to dead weight, further causing the inclination of the flange, along with the movement of the flange, the wiring row is lifted by hanging, and although a certain pulling effect is achieved, the acting force cannot be balanced with the displacement of the flange completely synchronously at present, so that the hanging hysteresis also occurs, manual periodic resetting is required in the actual process, the dilatometer is positioned at the side part of the wiring row, the dilatometer cannot measure the actual expansion quantity corresponding to the inside, large errors are often caused by the inclination of the wiring row, and the process is also required to be regularly assisted by manual means at present, so that the method cannot be satisfied for accurate monitoring and subsequent continuous larger platinum channel expansion management.
Disclosure of Invention
Aiming at the problems of measurement errors and still manual interference in the prior art, the invention provides a device and a method for monitoring thermal expansion of a platinum channel clarification section; in the aspect of temperature rise expansion management of a platinum channel clarification section, the expansion tracking of each clarification section is more accurate by designing a flange position mark led out from the side part. And the side dilatometer is combined to monitor the dilatometer, so that the problems are effectively solved.
The invention is realized by the following technical scheme: the utility model provides a platinum passageway clarification section thermal state expansion's monitoring devices, includes clamping face, clamping structure, extension pole, the clamping face is provided with two, and two clamping faces are parallel arrangement each other, be provided with clamping structure between two clamping faces, the one end of extension pole is connected to two clamping faces, the distance between two clamping faces is the same with the thickness of flange body, the dilatometer is connected to the one end of extension pole.
Further, a measuring surface is arranged at the joint of the extension rod and the dilatometer.
Further, the thickness of the measuring surface is the same as the thickness of the flange body.
Further, the clamping structure adopts a clamping bolt, and the clamping bolt fixes the distance between two clamping surfaces.
Further, the clamping surface is arranged in a fan-shaped structure.
Further, the length of the extension rod is set between 500mm and 800 mm.
Furthermore, the clamping surface and the extension rod are made of 304 stainless steel.
Further, the thickness of the clamping surface and the thickness of the extension rod are set to be 4mm-7mm.
The monitoring method based on the thermal expansion of the platinum channel clarification section comprises the following steps:
clamping the flange body through a flange side extraction device, wherein the axis of the flange side extraction device is perpendicular to that of the flange body;
An expansion meter is connected and arranged at the position of the side part extraction device of the flange;
The detection head is arranged on the flange to realize the monitoring of the displacement of the flange.
Further, the clamping depth of the flange side extraction device on the flange body is 30mm to 50mm.
Compared with the prior art, the invention has the following beneficial technical effects:
The invention discloses a monitoring device for thermal expansion of a platinum channel clarification section, which realizes stable clamping of a device by extending a flange body of the device to a clamping surface, and ensures the clamping effect through limiting the collective size in the device.
Further, the accuracy of measurement is guaranteed more through the setting of measuring face to the effectual production of error that has reduced, and on this device, through the setting of clamp structure, guaranteed the distance between the clamping face, prevented the probably emergence of artificial influence measuring result.
A monitoring method of thermal expansion of a platinum channel clarification section mainly aims at accurately measuring expansion of each section of the platinum channel clarification section in the heating process, and ensures the reliability of expansion; the actual expansion amount of each clarified section of flange is accurately monitored by designing an extraction device of the flange and matching with an expansion meter at the side part; expansion monitoring under deformation without deformation influenced by gravity is realized; by adopting the expansion management mode, the tracking precision of each section of flange is improved by nearly 76 percent, the jump of measurement data is basically avoided, and the effect of the invention is obvious through practical verification.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art monitoring structure provided in the background art;
Fig. 2 is a schematic device structure diagram of a device for monitoring thermal expansion of a clarification section of a platinum channel according to an embodiment of the present invention;
fig. 3 is a schematic device structure connection diagram of a monitoring device for thermal expansion of a clarification section of a platinum channel according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the device structure connection of a device for monitoring thermal expansion of a clarification section of a platinum channel according to an embodiment of the present invention;
In the figure: the measuring surface 1-1, the clamping surface 1-2, the clamping bolt 1-3, the extension rod 1-4, the flange side extraction device 1, the wiring row 2, the flange body 3, the platinum body 4, the refractory material 5, the dilatometer 6 and the flange hanger 7.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1:
In a certain preferred embodiment provided by the invention, a method for monitoring thermal expansion of a clarification section of a platinum channel is provided, and is mainly applied to expansion management of a temperature rising process of the platinum channel, mainly relates to expansion management of the clarification section, and belongs to the TFT-LCD substrate glass industry.
The method is realized through a monitoring device for thermal expansion of a platinum channel clarification section, and concretely comprises a measuring surface 1-1, a clamping surface 1-2, a clamping bolt 1-3, an extension rod 1-4, a flange side extraction device 1, a wiring row 2, a flange body 3, a platinum body 4, a refractory material 5, an dilatometer 6 and a flange hanger 7.
The flange side extraction device 1 comprises a measuring surface 1-1, a clamping surface 1-2, a clamping bolt 1-3 and an extension rod 1-4; the flange side extraction device 1 is made of 304 stainless steel, and the clamping bolts 1-3 are made of 304 stainless steel or the same nickel material on the outer side of the flange;
The clamping surfaces 1-2 of the flange side extraction device 1 are arranged in two, the two clamping surfaces 1-2 are clamped on the outer side of the flange main body 3 separately, the clamping depth is set between 30mm and 50mm, and in the embodiment, the clamping depth is set at 40mm. The distance between the two clamping surfaces 1-2 and the region connected with the measuring surface 1-1 is designed to be consistent with the thickness of the outer clamping region of the flange main body 3; the inner side wall surface of the clamping surface 1-2 is designed to be concentric with the flange main body 3, the radian is between 10 degrees and 30 degrees, the outer side of the clamping surface 1-2 is also designed to be concentric with the flange main body 3, and the width of the inner side and the outer side is generally designed to be in the range of 30mm to 50 mm; the clamping surface 1-2 is connected with the extension rod 1-4 by adopting a triangular rib, and the specific size of the triangular rib can act on about 1/3 of the total length of the extension rod 1-4; the number of the clamping bolts 1-3 is 2,3, 4 or more, the bolts are generally M10, M12 and M16, and the length of the clamping bolts 1-3 is determined according to the thickness of the flange main body 3 and the clamping surface 1-2; the length of the extension rod 1-4 is designed to be between 500mm and 800mm, the width of the extension rod is designed to be 30mm, and the shape of the side part of the extension rod is a standard rectangle;
The thickness of the clamping surface 1-2 and the extension rod 1-4 is set to be in the range of 4mm to 7 mm; the measuring surface 1-1, the measuring surface 1-1 connects two clamping and extending rod structures, the measuring surface 1-1 can be used for connecting the measuring surface 1-4 contacted by the dilatometer 6;
The measuring surface 1-1 is made of a solid stainless steel block, the width of the measuring surface 1-1 is the same as that of the extension rod, and the length of the measuring surface is in the range of 40mm to 60 mm; the main content of the flange monitoring method in the clarification section comprises the steps of eliminating the tracking point of the existing expansion 8, installing the side extraction device 1 on the positive side of the flange main body 3, horizontally extracting the side extraction device, installing a new expansion meter 6 on the same side as the side extraction device 1, and enabling the probe of the expansion meter to be contacted with the measuring surface 1-1 of the side extraction device 1.
Example 2:
A method for monitoring thermal expansion of a clarification section of a platinum channel mainly comprises the step of accurately monitoring the actual expansion of each section of flange by designing an extraction device of the flange to be matched with an expansion meter at the side part.
The structure of the flange side extraction measuring device is shown in figure 2, and the flange side extraction measuring device comprises a measuring surface 1-1, a clamping surface 1-2, a clamping bolt 1-3 and an extension rod 1-4; the side extraction device is made of 304 stainless steel, so that no damage component of the material to platinum is ensured, namely, the content of C and other reducing impurities is high, and the selected bolts are also made of the same material. In addition, the device can also adopt the nickel material which is the same as the outer side of the flange and has the same material as the measuring connector; the relative positions of the flange side part device 1 and the platinum channel are shown in fig. 3, the platinum body 4 is connected with the flange, the flange is divided into a flange main body 3 and a wiring row 2, and the side part extraction device 1 is horizontally extracted from one side of the flange;
The specific installation of the flange side device 1 is described with reference to fig. 2 and 3, two clamping surfaces 1-2 of the flange side extraction device 1 are provided, the two clamping surfaces 1-2 are clamped on the side of the flange main body 3 separately, the clamping depth is 50mm, mainly the distance between the two clamping surfaces 1-2 and the region connected with the measuring surface 1-1 is designed to be the same as the thickness of the outer clamping region of the flange main body 3 in the design process, and the whole side extraction device 1 and the flange surface are ensured to be in a coplanar state after clamping;
The inner side of the clamping surface 1-2 is designed to be concentric with the flange main body 3, the radian is 15 degrees, the specific selection of the radian is related to the range to be clamped, the outer side of the clamping surface 1-2 is designed to be concentric with the flange main body 3, the width of the inner side and the outer side is generally designed to be 30mm to 50mm, in addition, the clamping surface 1-2 is connected with the extension rod 1-4 by adopting a large triangular rib, and the specific size of the triangular rib can be applied to about 1/3 part of the total length of the extension rod 1-4, so that the integral structural strength is ensured;
The clamping bolts 1-3 are provided with 2 clamping bolts for ensuring the clamping stability, the bolts adopt M12, and the length is determined according to the thickness of the flange main body 3 and the clamping surface 1-2;
The length of the extension rod 1-4 is generally related to the outer contour of the clamping surface and the refractory of the refractory channel main body, the extension rod is generally between 500mm and 800mm according to the current dimension design, the width is 30mm, and the shape of the side part is a standard rectangle; the clamping surface 1-2 and the extension rod 1-4 are designed to have the same thickness, and the thickness is generally designed to be 4mm to 7mm according to the current use condition so as to meet the requirement; the measuring surface 1-1 comprises two main functions, namely a first structure for connecting two clamping and extending rods, and a second structure for connecting the measuring surface contacted by the dilatometer, wherein the measuring surface is made of a solid stainless steel block, so that deformation caused by the influence of temperature is avoided. The width of the measuring surface 1-1 is the same as that of the extension rod, and the length is generally 40mm to 60mm, so that the dilatometer 6 has enough contact surface and proper movement range;
according to the clarifying section flange monitoring method, the system layout is shown in fig. 1, and on the basis of the original equipment structure, namely, a flange wiring row 2, a flange main body 3, a platinum main body 4, a refractory material 5, a flange hanger 7 and an existing dilatometer 8, tracking points of the existing dilatometer 8 are canceled, and the fact that the flange wiring row is influenced by the hanger 7 and cannot be accurately coplanar with the flange in real time is mainly considered;
As shown in fig. 4, the system layout of the present invention is such that the side extraction device 1 is mounted on the front side of the flange main body 3 and is extracted horizontally, a new dilatometer 6 is mounted on the same side as the side extraction device 1, and the probe of the dilatometer is brought into contact with the measuring surface 1-1 of the side extraction device 1. In the actual operation process, along with the temperature rising expansion of each section of the channel, the flange moves along with the temperature rising expansion, and the measuring points acting on the side flange main body 3 can not incline due to the displacement of the upper wiring row 2 and the hanging 7, and the new expansion meter 6 can monitor the displacement of the flange in real time more accurately and without interference.
Through brand new application on a new line body, the expansion management mode of the invention improves the tracking precision of each section of flange by nearly 76 percent, and basically no jump of measurement data occurs, and the invention has obvious action effect through practice verification.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art. The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. The device is characterized by comprising a flange side extraction device (1) and an dilatometer (6), wherein the flange side extraction device (1) comprises two clamping surfaces (1-2), a clamping structure and an extensometer (1-4), the two clamping surfaces (1-2) are arranged in parallel, the clamping structure is arranged between the two clamping surfaces (1-2), the two clamping surfaces (1-2) are connected with one end of the extensometer (1-4), the distance between the two clamping surfaces (1-2) is the same as the thickness of the flange body (3), and one end of the extensometer (1-4) is connected with the dilatometer (6);
The connection part of the extension rod (1-4) and the dilatometer (6) is provided with a measuring surface (1-1).
2. The device for monitoring the thermal expansion of the clear section of a platinum channel according to claim 1, wherein the thickness of the measuring surface (1-1) is the same as the thickness of the flange body (3).
3. The device for monitoring the thermal expansion of the clear section of a platinum channel according to claim 1, wherein the clamping structure adopts a clamping bolt (1-3), and the clamping bolt (1-3) fixes the distance between two clamping surfaces (1-2).
4. A platinum channel clarification section thermal expansion monitoring device according to claim 1, wherein the clamping surfaces (1-2) are arranged in a fan-shaped structure.
5. A platinum channel clarification section thermal expansion monitoring device according to claim 1, characterized in that the length of the extension rod (1-4) is set between 500mm and 800 mm.
6. The device for monitoring the thermal expansion of the clarification section of the platinum channel according to claim 1, wherein the clamping surface (1-2) and the extension rod (1-4) are made of 304 stainless steel.
7. A platinum channel clarification section thermal expansion monitoring device according to claim 1, characterized in that the thickness of the clamping surface (1-2) and the extension rod (1-4) is set to 4-7 mm.
8. A method of monitoring a monitoring device based on thermal expansion of a clear section of a platinum channel as claimed in any one of claims 1 to 7, the method comprising the steps of:
Clamping the flange body (3) through the flange side extraction device (1), wherein the axes of the flange side extraction device (1) and the flange body (3) are mutually perpendicular;
an expansion meter (6) is connected and arranged at the measuring surface (1-1) of the flange side extraction device (1);
The detection head of the dilatometer (6) is arranged on the measuring surface (1-1) to realize the monitoring of the displacement of the flange.
9. Monitoring method according to claim 8, characterized in that the clamping depth of the flange side extraction device (1) on the flange body (3) is 30mm to 50mm.
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| CN202211589370.4A CN115818930B (en) | 2022-12-09 | 2022-12-09 | Device and method for monitoring thermal expansion of clarification section of platinum channel |
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| CN219032005U (en) * | 2022-12-09 | 2023-05-16 | 彩虹显示器件股份有限公司 | Platinum passageway clarification section thermal expansion's monitoring devices |
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| CN204198573U (en) * | 2014-09-30 | 2015-03-11 | 彩虹显示器件股份有限公司 | A kind of intensification settling section platinum channel thermal expansion management devices |
| CN105203584B (en) * | 2015-09-16 | 2018-05-22 | 河南科技大学 | Dilatometer |
| CN206347967U (en) * | 2016-11-17 | 2017-07-21 | 彩虹显示器件股份有限公司 | One kind is used for flange displacement detector during TFT furnace heating-ups |
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| CN111491899A (en) * | 2017-12-01 | 2020-08-04 | 康宁公司 | Apparatus and method for producing glass |
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| CN213141800U (en) * | 2020-07-23 | 2021-05-07 | 科立视材料科技有限公司 | Platinum channel |
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| CN112209600B (en) * | 2020-09-24 | 2023-02-03 | 彩虹集团有限公司 | Platinum channel installation method considering expansion characteristic and platinum channel |
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