CN209877615U - Roller kiln cooling device - Google Patents
Roller kiln cooling device Download PDFInfo
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- CN209877615U CN209877615U CN201920661112.XU CN201920661112U CN209877615U CN 209877615 U CN209877615 U CN 209877615U CN 201920661112 U CN201920661112 U CN 201920661112U CN 209877615 U CN209877615 U CN 209877615U
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Abstract
The utility model provides a roller kiln cooling device, which comprises a roller kiln and a plurality of cooling units arranged along the movement direction of products on the roller kiln; the cooling unit comprises a quick-cooling air blower fixedly arranged outside the roller kiln, a quick-cooling main pipe communicated with an air outlet of the quick-cooling air blower, a plurality of upper quick-cooling branch pipes communicated with the quick-cooling main pipe, and a plurality of lower quick-cooling branch pipes communicated with the quick-cooling main pipe; the upper quick cooling branch pipe is provided with a plurality of lower air outlet holes in the direction towards the products on the roller kiln; the lower quick cooling branch pipe is provided with a plurality of upper air outlet holes in the direction towards the products on the roller kiln. The utility model discloses a quick-cooling fan circular telegram produces the cold wind air current, and the air current gets into each and goes up fast cold branch pipe and fast cold branch pipe down behind the fast cold house steward, carries out air-jet cooling to the upper surface and the lower surface of the goods on the roller kilns respectively by the lower exhaust vent of last fast cold branch pipe, the last exhaust vent of lower fast cold branch pipe, and continuous cooling can improve cooling efficiency on the roller kilns, reduces fast cold time.
Description
Technical Field
The utility model relates to a ceramic manufacture equipment field especially relates to a roller kilns cooling device.
Background
The ceramic product needs to be rapidly cooled after the manufacturing stages of the processes such as sintering, quenching, slow cooling and the like, so that the product can be taken out of the kiln relatively stably and the temperature cannot be too high.
When the existing roller kiln cools products (such as foamed ceramics, sanitary ceramics and the like), only one row of axial flow fans are respectively arranged on two sides of a kiln wall, the number of the axial flow fans is determined according to the production condition, generally twenty axial flow fans are arranged on two sides of the kiln wall, and more axial flow fans are arranged on a roller table of the roller kiln, and the axial flow fans are directly acted to cool the products again. But the axial flow fan has low cooling efficiency, so that the quick cooling section of the existing roller kiln is longer, and the manufacturing cost and the production period of products of the kiln are increased; the service life of the axial flow fan is short, faults often occur in the production process, the production is not favorable, and the burden on staff is increased; from the environmental point of view, a plurality of axial flow fans operate simultaneously, so that large noise is generated, and adverse effects are caused to the working environment of workers. Therefore, the axial flow fan has poor effect when used in the roller kiln, the cooling efficiency of the axial flow fan is low due to low cooling efficiency, the sintering period is long due to the lengthened distance of the quick cooling section of the roller kiln, and the yield is reduced.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a roller kilns cooling device, can improve cooling efficiency, reduce the fast cold time, shorten fast cold section kiln length, reduce the firing cycle, for enterprise reduction in production cost to reduce equipment trouble.
The utility model provides a technical scheme that technical problem adopted as follows:
a roller kiln cooling device comprises a roller kiln for conveying products and a plurality of cooling units arranged along the movement direction of the products on the roller kiln;
the cooling unit comprises a quick cooling fan fixedly arranged on the outer side of the roller kiln, a quick cooling main pipe communicated with an air outlet of the quick cooling fan, a plurality of upper quick cooling branch pipes communicated with the quick cooling main pipe, and a plurality of lower quick cooling branch pipes communicated with the quick cooling main pipe;
the quick cooling main pipe extends along the moving direction of the product on the roller kiln;
the upper quick cooling branch pipes are arranged side by side along the movement direction of a product on the roller kiln, the upper quick cooling branch pipes are erected above the product on the roller kiln, and the upper quick cooling branch pipes are provided with a plurality of lower air outlet holes in the direction towards the product on the roller kiln;
a plurality of down fast cold branch pipe sets up side by side along the last goods direction of motion of roller kilns, the fast cold branch pipe erects down the below of goods on the roller kilns, down fast cold branch pipe is in the orientation a plurality of exhaust vents have been seted up in the direction of goods on the roller kilns.
Further, a connecting pipeline is fixedly arranged between the quick cooling fan and the quick cooling main pipe, the connecting pipeline is vertically connected with the quick cooling main pipe, and the connecting pipeline is used for communicating the quick cooling fan with the quick cooling main pipe.
Further, a main quick cooling pipe valve is arranged on the connecting pipeline and used for controlling the air flow in the quick cooling main pipe.
Furthermore, the upper quick-cooling branch pipe is vertically connected with the quick-cooling main pipe, and the lower quick-cooling branch pipe is vertically connected with the quick-cooling main pipe.
Furthermore, an upper quick-cooling branch pipe valve is arranged at one end, close to the quick-cooling main pipe, of the upper quick-cooling branch pipe, and a lower quick-cooling branch pipe valve is arranged at one end, close to the quick-cooling main pipe, of the lower quick-cooling branch pipe.
Furthermore, a silencer used for eliminating the noise of the quick cooling fan is arranged on the quick cooling fan.
Furthermore, the number of the cooling units is two, and the two cooling units are located on the same side of the roller kiln.
And further, the device also comprises a fan platform used for fixing the cooling unit, and the height of the fan platform is higher than that of the roller kiln.
Furthermore, the air conditioner also comprises an evacuation cover which is positioned above the upper quick cooling branch pipe and used for pumping out hot air, and an evacuation pipe which is fixedly connected with the evacuation cover and used for exhausting the hot air.
Further, the evacuation cover is positioned at the rear section part along the moving direction of the products on the roller kiln.
The beneficial effect who adopts above-mentioned scheme is: the utility model provides a roller kiln cooling device, it produces the cold wind air current to lead to the electricity through the fast air-cooler, the air current gets into each after the fast cold house steward and goes up fast cold branch pipe and fast cold branch pipe down, by the lower exhaust vent of last fast cold branch pipe, the last exhaust vent of lower fast cold branch pipe carries out jet-propelled cooling to the upper surface and the lower surface of the goods on the roller kiln respectively, last cooling can improve cooling efficiency on the roller kiln, reduce fast cold time, and adopt two cooling units just can cover whole fast cold section, thereby shorten fast cold section kiln length when improving cooling efficiency, the fast cold time has been reduced, thereby reduce and burn the cycle, for enterprise reduction in production cost. The quick-cooling fan adopts centrifugal blower to through the frequency conversion control rotational speed, can set for different cooling rate to different goods, centrifugal blower is general equipment simultaneously, and the technology is mature, and the user state is stable, can reduce the equipment trouble in the operation, thereby the silencer is established to the cover on the centrifugal blower reduces ambient noise, and improvement staff operation environment and intensity of labour.
Drawings
Fig. 1 is a top view of an embodiment of the roller kiln cooling device of the present invention.
Fig. 2 is a schematic structural diagram of another embodiment of the roller kiln cooling device of the present invention.
Fig. 3 is a schematic view of a connection structure of the fast cooling header pipe, the upper fast cooling branch pipe and the lower fast cooling branch pipe of an embodiment of the cooling device of the roller kiln.
In the figure: 100. a roller kiln; 200. a cooling unit; 210. a fast cooling fan; 220. a rapid cooling main pipe; 230. connecting a pipeline; 240. a total quick-cooling pipe valve; 250. an upper quick cooling branch pipe; 252. an upper quick-cooling branch pipe valve; 260. a lower quick cooling branch pipe; 262. a lower quick-cooling branch pipe valve; 300. a muffler; 400. evacuating the hood; 500. emptying the pipe; 600. a power supply control cabinet; 700. a variable frequency control cabinet; 800. a fan platform.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 1 is a top view of an embodiment of the roller kiln cooling device of the present invention; FIG. 2 is a schematic structural view of another embodiment of the cooling device of the roller kiln of the present invention; fig. 3 is a schematic view of a connection structure of the fast cooling header pipe, the upper fast cooling branch pipe and the lower fast cooling branch pipe of an embodiment of the cooling device of the roller kiln. Fig. 2 is essentially the same as fig. 1, and may be referred to each other in understanding the structural principle.
As shown in fig. 1, a roller kiln cooling device comprises a roller kiln 100, a product disposed on the roller kiln 100 and being transported forward by the roller kiln 100, and one or more cooling units 200 disposed along a moving direction of the product on the roller kiln 100; the cooling unit 200 cools the products conveyed on the roller kiln 100 until reaching a suitable temperature, and the products flow to the next process.
As shown in fig. 1 and 2, the cooling unit 200 includes a fast cooling air blower 210, the fast cooling air blower 210 is fixedly disposed outside the roller kiln 100, and an air outlet of the fast cooling air blower 210 is communicated with a fast cooling main pipe 220, the fast cooling main pipe 220 extends along the direction of movement of the product on the roller kiln 100, the fast cooling air blower 210 in this embodiment employs a centrifugal blower with power of 18.5KW, and the fast cooling main pipe 220 employs a PVC pipe with diameter of 600 MM. In a preferred connection mode, a connecting pipe 230 is fixedly arranged between the quick cooling fan 210 and the quick cooling manifold 220, the connecting pipe 230 is vertically connected with the quick cooling manifold 220, and the connecting pipe 230 is used for communicating the quick cooling fan 210 and the quick cooling manifold 220; the diameter of the connecting pipe 230 is greater than or equal to the diameter of the fast cooling manifold 220, so that cold air generated by the fast cooling fan 210 can enter the fast cooling manifold 220 quickly, the connecting pipe 230 is vertically connected with the fast cooling manifold 220 (as shown in fig. 1), and the fast cooling manifold 220 and the fast cooling fan 210 can be assembled in a welding manner conveniently. Other connections between the connecting pipe 230 and the rapid cooling manifold 220 are also possible (see fig. 2). Be provided with total fast cold pipe valve 240 on connecting tube 230, total fast cold pipe valve 240 is used for controlling the airflow in fast cold house steward 220, and the cooling rate of this cooling unit 200 section is controlled to accessible total fast cold pipe valve 240, prevents that the product from in the cooling process, and cooling rate is improper, causes abnormal phenomena such as product fracture to appear.
As shown in fig. 2 and 3, the rapid cooling main pipe 220 is communicated with 24 upper rapid cooling branch pipes 250 and 24 upper rapid cooling branch pipes 250 which are arranged side by side along the movement direction of the products on the roller kiln 100, and 24 upper rapid cooling branch pipes 250 are full of the rapid cooling main pipe 220 and 24 upper rapid cooling branch pipes 250 are erected above the products on the roller kiln 100, the upper rapid cooling branch pipes 250 are provided with a plurality of lower air outlets (not shown in the figure) in the direction towards the products on the roller kiln 100, and the lower air outlets are full of the upper rapid cooling branch pipes 250. 24 lower quick cooling branch pipes 260 are communicated with the quick cooling main pipe 220; 24 the fast cold branch 260 sets up side by side along the direction of motion of goods on the roller kiln 100 down, 24 the fast cold branch 260 erects down the below of goods on the roller kiln 100, 24 the fast cold branch 260 is in the orientation down a plurality of exhaust vents (not marked in the figure) have been seted up in the direction of goods on the roller kiln 100, go up the exhaust vent and have been covered with down fast cold branch 260. Spacing gaps are reserved between the upper quick cooling branch pipes 250 which are arranged side by side, spacing gaps are reserved between the lower quick cooling branch pipes 260 which are arranged side by side, and after the products are cooled by gas sprayed from the upper air outlet and the lower air outlet, the gas can flow out or be pumped out through the spacing gaps, so that the heat is prevented from being concentrated on the surfaces of the products.
The working principle of the embodiment is as follows: the rapid cooling fan 210 is started, natural wind forms airflow under the gravity of the rapid cooling fan 210, the airflow is transmitted into the rapid cooling manifold 220, and then is transmitted into the upper rapid cooling branch pipe 250 and the lower rapid cooling branch pipe 260 through the rapid cooling manifold 220, the airflow is directly blown onto the upper surface of a product from the lower air outlet of the upper rapid cooling branch pipe 250, so as to cool the upper surface of the product on the roller kiln 100, the airflow is directly blown onto the lower surface of the product from the upper air outlet of the lower rapid cooling branch pipe 260, so as to cool the lower surface of the product on the roller kiln 100, the product moves forward on the roller kiln 100 along the laying direction of the rapid cooling manifold 220, and sequentially passes through the upper rapid cooling branch pipe 250 and the lower rapid cooling branch pipe 260 which are arranged side by side, so as to rapidly cool the product. The experience of this system absorption quench zone cooling method carries out big transformation to traditional roller kiln 100 fast cooling sections that adopt the multiaxis fan to cool off the goods fast with brand-new mode, regard as the cooling source with centrifugal blower's fast wind, makes the goods in proper order through last exhaust vent and lower exhaust vent spun fast wind, carries out fast cooling to the goods. The cooling efficiency is improved, the fast cooling time is shortened, the length of a fast cooling section kiln is shortened, the firing period is shortened, the production cost of an enterprise is reduced, equipment faults are reduced, and the working environment and the labor intensity of workers are improved.
As shown in fig. 1, in this embodiment, a power control cabinet 600 is further included for supplying power to the fast cooling air blower 210, the fast cooling air blower 210 is connected to a frequency conversion control cabinet 700, and the frequency conversion control cabinet 700 controls the output power of the fast cooling air blower 210. When the cooling rate is not up to standard, the frequency conversion can be adjusted on the frequency conversion control cabinet 700, so that the rotating speed of the quick cooling fan 210 is controlled, and the cooling rate and the kiln discharging temperature of the product are controlled. The cooling rate can be adjusted to be suitable according to different products.
As shown in fig. 1, the upper rapid cooling branch pipe 250 is vertically connected to the rapid cooling main pipe 220, and the lower rapid cooling branch pipe 260 is vertically connected to the rapid cooling main pipe 220; like this, be convenient for go up fast cold branch pipe 250, down fast cold branch pipe 260 and fast cold house steward 220 welded fitting, when the air-out cooling is carried out to goods to air-out hole, last air-out hole down simultaneously, make the surface of goods evenly catch the wind, avoid cooling rate improper, cause abnormal phenomena such as product fracture to appear. An upper quick-cooling branch valve 252 is arranged at one end of the upper quick-cooling branch pipe 250 close to the quick-cooling main pipe 220, and a lower quick-cooling branch pipe valve 262 is arranged at one end of the lower quick-cooling branch pipe 260 close to the quick-cooling main pipe 220. The airflow in the upper quick cooling branch pipe 250 is adjusted through the upper quick cooling branch pipe valve 252, so that the cooling rate of each position on the upper quick cooling branch pipe 250 is adjusted, and abnormal phenomena such as cracking of the product caused by improper cooling rate of the product in the cooling process are prevented. The airflow in the lower fast cooling branch pipe 260 is adjusted through the lower fast cooling branch pipe valve 262, so that the cooling rate of each position on the lower fast cooling branch pipe 260 is adjusted, and abnormal phenomena such as cracking of the product caused by improper cooling rate of the product in the cooling process are prevented.
The fast cooling fan 210 in this embodiment is provided with a silencer 300 for eliminating noise of the fast cooling fan 210. Muffler 300 sets up at the air intake of fast-cooling fan 210, can effective control fast-cooling fan 210's noise problem to reduce the noise of the fast cold section of roller kiln 100, reduce ambient noise, and improve staff's operational environment.
The number of the cooling units 200 in this embodiment is two, and the two cooling units 200 are located on the same side of the roller kiln 100. Roller kilns 100 comprises multisection kiln, the roller table length of every section kiln is 2000mm probably, roller kilns are total to eight sections of quick-cooling sections of roller kilns, quick-cooling house steward 220 length is about 8000mm, consequently a cooling unit 200 can correspond four sections kilns of cooling, eight sections kilns in this embodiment correspond and are provided with two cooling units 200, cooling unit 200's quick-cooling house steward 220 sets up to be linked together, can make two cooling units 200's wind-force supplement each other in quick-cooling house steward 220 like this, make cold wind obtain make full use of. Each kiln is correspondingly provided with 6 upper cooling branch pipes and 6 lower cooling branch pipes. The two cooling units 200 are arranged on the same side of the roller kiln 100, so that the space of a production workshop can be saved, and the cooling units 200 can be conveniently connected in an electrified way. The fast cooling fans 210 of the two cooling units 200 are fixedly connected with fan platforms 800 through screws, and the height of each fan platform 800 is higher than that of the roller kiln 100; or the height of the fan platform 800 is close to that of the roller kiln 100, so that the fast cooling fan 210 is lifted to the height above the roller kiln 100 through the fan platform 800, the installation of each pipeline is facilitated, the installation length of the pipeline is reduced, and the bearing capacity of the pipeline borne by the cooling unit 200 is more balanced.
In order to facilitate the air discharge, the present embodiment further includes an evacuation cover 400 located above the upper quick cooling branch pipe 250 and used for drawing out hot air, and an evacuation pipe 500 for discharging hot air is fixedly connected to the evacuation cover 400. The gas discharged from the upper quick cooling branch pipe 250 and the lower quick cooling branch pipe 260 can be drawn out through the evacuation cover 400 and then discharged through the evacuation pipe 500, so that the air flow circulation can be realized in the quick cooling section of the roller kiln 100, and cold air is continuously supplemented, thereby realizing quick cooling. In a preferred embodiment, the evacuation cover 400 is located at the rear section part along the moving direction of the product on the roller kiln 100, the fast cooling section in this embodiment has eight sections of kilns, and the evacuation cover 400 covers four sections of kilns at the rear section; the front part of the fast cooling section has higher temperature, the temperature of the discharged hot air is higher, the hot air can be pumped away and collected by the drawing force of the slow cooling section and then reused, the temperature of the discharged hot air of the rear section is lower, the utilization rate is not high, and the hot air can be directly emptied through the rear two emptying pipes 500. Therefore, energy waste is avoided, and resources are saved.
To sum up, the utility model provides a roller kiln cooling device, it produces the cold wind air current to lead to the electricity through fast-cooling fan 210, the air current gets into each after fast-cooling house steward 220 and goes into fast-cooling branch pipe 250 and fast-cooling branch pipe 260 down, by last exhaust vent 252 of last fast-cooling branch pipe 250, the last exhaust vent 262 of lower fast-cooling branch pipe 260 carries out air-jet cooling to the upper surface and the lower surface of the goods on roller kiln 100 respectively, the last cooling can improve cooling efficiency on roller kiln 100, reduce fast cooling time, and adopt two cooling unit 200 just can cover whole fast cooling section, thereby shorten fast cooling section kiln length when improving cooling efficiency, fast cooling time has been reduced, thereby reduce the firing cycle, for enterprise reduction in production cost. Fast-cooling fan 210 adopts centrifugal blower to through the frequency conversion control rotational speed, can set for different cooling rate to different goods, centrifugal blower is general equipment simultaneously, and the technology is mature, and use status is stable, can reduce the equipment trouble in the operation, thereby silencer 300 is established to the cover on the centrifugal blower reduces ambient noise, and improvement staff's operational environment and intensity of labour.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A roller kiln cooling device comprises a roller kiln for conveying products, and is characterized by also comprising a plurality of cooling units arranged along the movement direction of the products on the roller kiln;
the cooling unit comprises a quick cooling fan fixedly arranged on the outer side of the roller kiln, a quick cooling main pipe communicated with an air outlet of the quick cooling fan, a plurality of upper quick cooling branch pipes communicated with the quick cooling main pipe, and a plurality of lower quick cooling branch pipes communicated with the quick cooling main pipe;
the quick cooling main pipe extends along the moving direction of the product on the roller kiln;
the upper quick cooling branch pipes are arranged side by side along the movement direction of a product on the roller kiln, the upper quick cooling branch pipes are erected above the product on the roller kiln, and the upper quick cooling branch pipes are provided with a plurality of lower air outlet holes in the direction towards the product on the roller kiln;
a plurality of down fast cold branch pipe sets up side by side along the last goods direction of motion of roller kilns, the fast cold branch pipe erects down the below of goods on the roller kilns, down fast cold branch pipe is in the orientation a plurality of exhaust vents have been seted up in the direction of goods on the roller kilns.
2. The roller kiln cooling device according to claim 1, characterized in that: the quick-cooling air conditioner is characterized in that a connecting pipeline is fixedly arranged between the quick-cooling air conditioner and the quick-cooling main pipe, the connecting pipeline is vertically connected with the quick-cooling main pipe, and the connecting pipeline is used for communicating the quick-cooling air conditioner with the quick-cooling main pipe.
3. The roller kiln cooling device according to claim 2, characterized in that: and a main quick cooling pipe valve is arranged on the connecting pipeline and used for controlling the gas flow in the quick cooling main pipe.
4. The roller kiln cooling device according to claim 1, characterized in that: the upper quick-cooling branch pipe is vertically connected with the quick-cooling main pipe, and the lower quick-cooling branch pipe is vertically connected with the quick-cooling main pipe.
5. The roller kiln cooling device according to claim 1, characterized in that: an upper quick-cooling branch pipe valve is arranged at one end, close to the quick-cooling main pipe, of the upper quick-cooling branch pipe, and a lower quick-cooling branch pipe valve is arranged at one end, close to the quick-cooling main pipe, of the lower quick-cooling branch pipe.
6. The roller kiln cooling device according to claim 5, characterized in that: and a silencer used for eliminating the noise of the quick cooling fan is arranged on the quick cooling fan.
7. The roller kiln cooling device according to any one of claims 1 to 6, characterized in that: the two cooling units are arranged on the same side of the roller kiln.
8. The roller kiln cooling device according to claim 7, characterized in that: the cooling machine set also comprises a fan platform used for fixing the cooling machine set, and the height of the fan platform is higher than that of the roller kiln.
9. The roller kiln cooling device according to claim 8, characterized in that: the air conditioner further comprises an evacuation cover which is positioned above the upper quick cooling branch pipe and used for pumping out hot air, and an evacuation pipe which is fixedly connected with the evacuation cover and used for exhausting the hot air.
10. The roller kiln cooling device according to claim 9, characterized in that: the evacuation cover is positioned at the rear section part along the moving direction of the products on the roller kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661112.XU CN209877615U (en) | 2019-05-09 | 2019-05-09 | Roller kiln cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661112.XU CN209877615U (en) | 2019-05-09 | 2019-05-09 | Roller kiln cooling device |
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| Publication Number | Publication Date |
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| CN209877615U true CN209877615U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920661112.XU Active CN209877615U (en) | 2019-05-09 | 2019-05-09 | Roller kiln cooling device |
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| CN (1) | CN209877615U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006250A (en) * | 2019-05-09 | 2019-07-12 | 东莞市唯美陶瓷工业园有限公司 | A kind of roller kilns cooling device |
-
2019
- 2019-05-09 CN CN201920661112.XU patent/CN209877615U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006250A (en) * | 2019-05-09 | 2019-07-12 | 东莞市唯美陶瓷工业园有限公司 | A kind of roller kilns cooling device |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210128 Address after: 523281 Mei Mei Ceramic Industrial Park, Tangxia village, Gao Gao town, Dongguan, Guangdong Patentee after: DONGGUAN CITY WONDERFUL CERAMICS INDUSTRIAL PARK Co.,Ltd. Patentee after: JIANGXI WONDERFUL CERAMIC Co.,Ltd. Address before: 523281 Tangxia village, Gaopo Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN CITY WONDERFUL CERAMICS INDUSTRIAL PARK Co.,Ltd. Patentee before: DONGGUAN WEIMEI DECORATION MATERIALS Co.,Ltd. Patentee before: JIANGXI HEMEI CERAMICS Co.,Ltd. |
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| TR01 | Transfer of patent right |