CN215002863U - Energy-saving roller kiln - Google Patents
Energy-saving roller kiln Download PDFInfo
- Publication number
- CN215002863U CN215002863U CN202122657689.3U CN202122657689U CN215002863U CN 215002863 U CN215002863 U CN 215002863U CN 202122657689 U CN202122657689 U CN 202122657689U CN 215002863 U CN215002863 U CN 215002863U
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- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 244000309464 bull Species 0.000 claims description 11
- 230000007723 transport mechanism Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001354 calcination Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 230000001739 rebound effect Effects 0.000 description 1
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- 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
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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Abstract
The utility model discloses an energy-saving roller kiln, belonging to the technical field of roller kilns, comprising a first shell, wherein the upper end of the first shell is fixedly connected with a second shell; the kiln is arranged in the second shell; the two ends of the rollers are respectively connected to the inner walls of the two sides of the first shell; a carrier box mounted on the plurality of rollers; a transport mechanism comprising a chain and a plurality of sprockets; this device adopts a plurality of sprockets and two chains to carry out whole driven mode to a plurality of rollers, make a plurality of rollers synchronous rotation carry out the conveying to carrying the thing box, the loss of kinetic energy when having reduced the transmission, and can be when carrying the thing box conveying and advancing the second casing in the second casing self-closing second casing and carry the thing box conveying and open the second casing voluntarily when going out the second casing through the switch door mechanism that is equipped with, thermal excessive and scattered has been reduced, the further consumption that reduces the energy, thereby make the energy-conservation of this device strengthen greatly.
Description
Technical Field
The utility model belongs to the technical field of the roller kilns, concretely relates to energy-conserving roller kilns.
Background
The roller kiln is mainly used for producing ceramic building materials and is a tunnel kiln using twisted rollers as a green body carrying tool. The roller kiln is characterized in that ceramic products are placed on a backing plate, then the backing plate is placed on a fireproof roller, and then the roller is rotated, so that a green body drives the ceramic products to be conveyed from the head of the kiln to the tail of the kiln step by step to be calcined. The advantages are that: the roller kiln has a small section and balanced temperature inside, and is suitable for firing.
The existing roller kiln adopts a mode of installing a small chain wheel between adjacent rollers and grouping to stably rotate to convey a blank body, the kinetic energy loss is large during transmission, so that the energy consumption is increased, and when the roller kiln is fired, the roller kiln is open and is not provided with a door body for shielding, so that partial heat is overflowed out of the roller kiln, and the energy consumption is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an energy-conserving roller kilns aims at solving among the prior art because adopt to install a little sprocket between adjacent roller, divides into groups steady rotation and comes to carry out the mode that conveys to the idiosome, and the kinetic energy loss is great when the transmission, leads to the power consumption to increase to when firing, the kiln is open not have the door body to shelter from, lead to outside partial heat overflow effluvium kiln, also can increase the problem of the consumption of the energy.
The utility model adopts the technical scheme as follows:
the utility model discloses an energy-conserving roller kilns, include:
the upper end of the first shell is fixedly connected with a second shell;
a kiln mounted within the second housing;
the two ends of the rollers are respectively connected to the inner walls of the two sides of the first shell;
a carrier cassette mounted on a plurality of rollers;
the conveying mechanism comprises a chain and a plurality of chain wheels, the chain wheels are fixedly connected to the circumferential surfaces of the rollers respectively, and the chain is in transmission engagement with the circumferential surfaces of the chain wheels;
the door opening and closing mechanism comprises a rotating part, two first door bodies and two second door bodies, wherein the two first door bodies are movably hinged to one side end of the second shell through hinges, the two second door bodies are movably hinged to the other side end of the second shell through hinges, and the rotating part is connected with the object carrying box, the two first door bodies and the two second door bodies so as to realize automatic opening of the two first door bodies and automatic closing of the two second door bodies; and
and the driving mechanism is connected with the conveying mechanism to realize the operation of the conveying mechanism.
As an optimal scheme of the utility model, transport mechanism is equipped with two sets ofly, and two sets of transport mechanism are based on the mid point symmetry of first casing.
As a preferred embodiment of the present invention, the driving mechanism includes a supporting plate and a motor, the supporting plate is fixedly connected to a side of the first housing, the motor is fixedly connected to a side of the supporting plate, and the output end of the motor is movably connected to one end of one of the rollers through an inner wall of the first housing.
As an optimal scheme of the utility model, the rotatable parts includes two spur racks, a plurality of gear and bull stick, and is a plurality of bull stick fixed connection respectively is in the lower extreme of two first door bodies and two second door bodies, and is a plurality of gear difference fixed connection is in the circumferential surface of a plurality of bull sticks, two spur rack difference fixed connection is in the both sides end of carrying the thing box, and two spur racks respectively with a plurality of bull stick phase-matches.
As an optimal scheme of the utility model, it is a plurality of the circumferential surface of bull stick all overlaps and is equipped with the torsional spring, and is a plurality of fixed connection is in the both sides end of second casing respectively, and is a plurality of the other end of torsional spring is fixed connection in the upper end of a plurality of gears respectively.
As an optimized scheme of the utility model, the equal a plurality of bearings of fixedly connected with of both sides inner wall of first casing, it is a plurality of the roller is fixed connection respectively in the circumference inner wall of a plurality of bearings.
The technical effects of the utility model are as follows:
1. in this scheme, both parts all are fixed with the sprocket around the circumferential surface of a plurality of rollers, carry out the transmission through two chains respectively between a plurality of sprockets, through whole driven mode, make a plurality of rollers rotate in step and carry the thing box and convey, the loss of kinetic energy when having reduced the transmission, and can be when carrying the thing box conveying and advancing the second casing when automatic closing second casing and carrying the thing box conveying and opening the second casing when the second casing, thermal excessive scattering has been reduced, the consumption of the energy has further been reduced.
2. In this scheme, the circumferential surface of a plurality of bull sticks all overlaps and is equipped with the torsional spring, and the one end of a plurality of torsional springs is fixed connection in the both sides end of second casing respectively, and the other end of a plurality of torsional springs is fixed connection in the upper end of a plurality of gears respectively, and the rebound effect through a plurality of torsional springs can make two spur racks and a plurality of gears break away from the contact back, and two first door bodies and two second door body can automatic gyration and resume initial position so that calcine next time.
3. In this scheme, a plurality of rollers rotate through a plurality of bearings and connect in the front and back inner wall of first casing, and a plurality of bearings play the rotation that supports a plurality of rollers, reduce the coefficient of friction in its motion process to guarantee its gyration precision's effect, thereby can further reduce the loss of kinetic energy.
Drawings
Fig. 1 is an exploded view of the present invention;
fig. 2 is a perspective view of the carrier case of the present invention when not entering the second housing;
fig. 3 is an enlarged view of a portion a of fig. 2 according to the present invention;
fig. 4 is a perspective view of the loading box of the present invention entering the second housing;
fig. 5 is a perspective view of the carrying case of the present invention when it leaves the second housing;
fig. 6 is a partial exploded view of the second housing of the present invention.
The labels in the figure are: 1. a first housing; 101. a second housing; 102. a first door body; 103. a second door body; 2. a kiln; 3. a carrying box; 4. a roller; 401. a sprocket; 402. a chain; 403. a bearing; 5. a support plate; 501. a motor; 6. straight rack; 601. a gear; 602. a rotating rod; 603. a torsion spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
In the present embodiment, the data used is the preferred scheme, but is not used to limit the present invention.
Example 1
Referring to fig. 1-6, the present invention provides the following technical solutions:
an energy-saving roller kiln comprising:
the device comprises a first shell 1, wherein the upper end of the first shell 1 is fixedly connected with a second shell 101;
the kiln 2 is arranged in the second shell 101;
a plurality of rollers 4, both ends of the plurality of rollers 4 being connected to both side inner walls of the first housing 1, respectively;
a carrier case 3, the carrier case 3 being mounted on the plurality of rollers 4;
the conveying mechanism comprises a chain 402 and a plurality of chain wheels 401, the plurality of chain wheels 401 are fixedly connected to the circumferential surfaces of the plurality of rollers 4 respectively, and the chain 402 is connected to the circumferential surfaces of the plurality of chain wheels 401 in a transmission engagement mode;
the door opening and closing mechanism comprises a rotating part, two first door bodies 102 and two second door bodies 103, wherein the two first door bodies 102 are movably hinged to one side end of the second shell 101 through hinges, the two second door bodies 103 are movably hinged to the other side end of the second shell 101 through hinges, and the rotating part is connected with the object carrying box 3, the two first door bodies 102 and the two second door bodies 103 to realize automatic opening of the two first door bodies 102 and automatic closing of the two second door bodies 103; and
and the driving mechanism is connected with the conveying mechanism to realize the operation of the conveying mechanism.
In the embodiment of the present invention, the first casing 1 plays a role of fixing and supporting other structures of the device, the upper end of the first casing 1 is open, the first casing 1 is integrally in a shape of "square", the second casing 101 is fixed at the middle part of the upper end of the first casing 1, both the front and rear ends of the second casing 101 are open, the second casing 101 is integrally in a shape of inverted "U", the lower inner wall of the first casing 1 is provided with the kiln 2, the kiln 2 is electrically connected with an external power source for calcination, six uniformly distributed rollers 4 are connected between the left and right inner walls of the first casing 1, the six rollers 4 are located between the first casing 1 and the second casing 101, the upper ends of the six rollers 4 are provided with the loading box 3, the upper ends of the loading box 3 are open for loading a blank to be calcined, the front parts of the circumferential surfaces of the six rollers 4 are all fixed with chain wheels 401, the six chain wheels 401 are in transmission connection through a chain 402, the roller 4 positioned at the rightmost side is driven to rotate through the driving mechanism, the chain wheel 401 positioned at the rightmost side can be driven to rotate, and then other five chain wheels 401 and the rollers 4 are driven to rotate through the transmission action of the chain 402, so that the loading box 3 can be conveyed into the second shell 101 leftwards through the friction force of the six rollers 4, the energy consumption can be reduced through the mode that the chain 402 carries out integral transmission on the six rollers 4, the front part and the rear part of the right end of the second shell 101 are movably hinged with first door bodies 102 through hinges, the two first door bodies 102 are symmetrical front and back based on the midpoint of the second shell 101, the front part and the rear part of the left end of the second shell 101 are movably hinged with second door bodies 103 through hinges, the two second door bodies 103 are symmetrical front and back based on the midpoint of the second shell 101, when the loading box 3 does not enter the second shell 101, the two first door bodies 102 are in an open state, and the two second door bodies 103 are in a closed state, when the loading box 3 enters the second casing 101, the provided rotating part can drive the two first door bodies 102 to rotate towards the approaching direction respectively to seal the second casing 101, and when the loading box 3 is continuously conveyed leftwards and leaves from the second casing 101, the provided rotating part can drive the two second door bodies 103 to rotate towards the departing direction respectively to allow the loading box 3 to leave, so that the heat overflow and dissipation are reduced. For those skilled in the art, the kiln 2 is the prior art and will not be described in too much detail;
preferably, the rollers 4 located outside the second housing 101 at the front and rear sides are made of nichrome, which is heat-resistant, and the rollers 4 located inside the second housing 101 are made of ceramic, which is more heat-resistant.
Specifically, referring to fig. 1, two sets of transmission mechanisms are provided, and the two sets of transmission mechanisms are symmetrical based on the midpoint of the first housing 1.
In this embodiment: the rear parts of the circumferential surfaces of the six rollers 4 are respectively fixed with a chain wheel 401, the six chain wheels 401 positioned on the rear side are in transmission connection through a chain 402, and the two groups of conveying mechanisms are symmetrical front and back based on the middle point of the first shell 1, so that the six rollers 4 are stressed more uniformly and rotate more stably, and the carrying box 3 is conveyed more stably.
Specifically referring to fig. 2, 4 and 5, the driving mechanism includes a supporting plate 5 and a motor 501, the supporting plate 5 is fixedly connected to one side end of the first casing 1, the motor 501 is fixedly connected to one side end of the supporting plate 5, and an output end of the motor 501 movably penetrates through an inner wall of one side of the first casing 1 and is fixedly connected to one end of one of the rollers 4.
In this embodiment: the front end right part of first casing 1 is fixed with backup pad 5, backup pad 5 is "L" shape, the rear end of backup pad 5 is fixed with motor 501, the front end and the preceding inner wall of first casing 1 are run through in the activity of motor 501's output shaft, and motor 501's output shaft is fixed in the front end that is located the roller 4 on rightmost side again, different models can be selected according to actual need to backup pad 5, for example, the selection model is Y630-10/1180, backup pad 5 and external power source electric connection, operation through backup pad 5, can drive the roller 4 that is located the rightmost side and rotate, and then drive the operation of two sets of transport mechanism and carry thing box 3 and convey. For those skilled in the art, the above-mentioned supporting plate 5 is prior art and will not be described in too much detail.
Specifically referring to fig. 1, 3 and 6, the rotating member includes two spur racks 6, a plurality of gears 601 and a rotating rod 602, the plurality of rotating rods 602 are respectively and fixedly connected to the lower ends of the two first door bodies 102 and the two second door bodies 103, the plurality of gears 601 are respectively and fixedly connected to the circumferential surfaces of the plurality of rotating rods 602, the two spur racks 6 are respectively and fixedly connected to the two side ends of the loading box 3, and the two spur racks 6 are respectively matched with the plurality of rotating rods 602.
In this embodiment: the lower end shaft parts of the two first door bodies 102 and the two second door bodies 103 are respectively fixed with a rotating rod 602, the circumferential surfaces of the four rotating rods 602 are respectively fixed with a gear 601, the front end and the rear end of the object carrying box 3 are respectively fixed with a straight rack 6, the two straight racks 6 are front-back symmetrical based on the middle point of the object carrying box 3, when the carrier 3 moves to the left, the two spur racks 6 will first mesh with the two gears 601 on the right side to drive the two gears 601 on the right side to rotate in opposite directions, thereby driving the two first door bodies 102 to rotate towards the approaching direction at the same time to close the second casing 101, when the carrier 3 continues to move to the left, the two spur racks 6 again come out of contact with the two gear wheels 601 located on the left, then engages with the two gears 601 at the left side, and further drives the two gears 601 at the left side to rotate, and then the two second door bodies 103 are driven to rotate towards the direction away from each other at the same time to open the second shell 101.
Specifically referring to fig. 3 and 6, torsion springs 603 are respectively sleeved on the circumferential surfaces of the rotating rods 602, one ends of the torsion springs 603 are respectively and fixedly connected to the two side ends of the second casing 101, and the other ends of the torsion springs 603 are respectively and fixedly connected to the upper ends of the gears 601.
In this embodiment: when the four torsion springs 603 are in a relaxed state, the two first door bodies 102 are in an opened state, the two second door bodies 103 are in a closed state, when the two first door bodies 102 rotate to open, the two torsion springs 603 on the right side can be twisted and compressed, after the two spur racks 6 are separated from the two gears 601 on the right side, the two first door bodies 102 can automatically rotate in a direction away from each other under the resilience of the two torsion springs 603 on the right side to reopen the second casing 101, and similarly, after the two spur racks 6 are separated from the two gears 601 on the left side, the two second door bodies 103 can automatically rotate in a direction approaching each other under the resilience of the two torsion springs 603 on the left side to reopen the second casing 101.
Specifically, referring to fig. 1, a plurality of bearings 403 are fixedly connected to both side inner walls of the first housing 1, and a plurality of rollers 4 are respectively and fixedly connected to the circumferential inner walls of the plurality of bearings 403.
In this embodiment: the front and rear inner walls of the first housing 1 are fixedly connected with six bearings 403 which are uniformly distributed, the front parts of the circumferential surfaces of the six rollers 4 are respectively and fixedly connected with the circumferential inner walls of the six bearings 403 which are positioned at the front side, the rear parts of the circumferential surfaces of the six rollers 4 are respectively and fixedly connected with the circumferential inner walls of the six bearings 403 which are positioned at the rear side, and the bearings 403 play a role in supporting the rotation of the rollers 4, reducing the friction coefficient in the movement process and ensuring the rotation precision of the rollers.
The utility model discloses a theory of operation and use flow: firstly, after a blank to be calcined is placed in a loading box 3, two straight racks 6 are respectively aligned with four gears 601, then the loading box 3 is placed on a roller 4 positioned at the rightmost side, then a motor 501 is controlled to be started, the motor 501 can drive the roller 4 positioned at the rightmost side to rotate, then a plurality of rollers 4 are driven to synchronously rotate through the transmission action of a plurality of chain wheels 401 and two chains 402, then the loading box 3 is driven to move towards the left side through the friction force of the plurality of rollers 4, then the two straight racks 6 can be respectively meshed with two gears 601 positioned at the right side, further two gears 601 and two rotating rods 602 positioned at the right side are driven to rotate, and two torsion springs 603 positioned at the right side are compressed, the two rotating rods 602 positioned at the right side can drive two first door bodies 102 to respectively rotate towards the direction close to a second shell 101, at the moment, the loading box 3 enters the second shell 101, then the motor 501 is controlled to stop running, the kiln 2 is controlled to run to calcine the blank in the loading box 3, after the calcination is completed, the kiln 2 is controlled to stop running, then the motor 501 is controlled to run to enable the loading box 3 to continue moving leftwards, the loading box 3 can firstly abut against the two second door bodies 103 and push the two second door bodies 103, then the two straight racks 6 can be respectively meshed with the two gears 601 on the left side, and further the two second door bodies 103 are driven to respectively rotate towards the direction away from each other to open the second shell 101 so that the loading box 3 can pass through, at the moment, due to the resilience effect of the four torsion springs 603, the two first door bodies 102 and the two second door bodies 103 can be driven to respectively reversely rotate back to the initial positions, and then the loading box 3 can be taken down to complete the calcination; this device adopts a plurality of sprockets 401 and two chains 402 to carry out whole driven mode to a plurality of rollers 4, make a plurality of rollers 4 synchronous rotation carry out the conveying to carrying thing box 3, the loss of kinetic energy when having reduced the transmission, and can be when carrying thing box 3 transmission to second casing 101 in self-closing second casing 101 and carrying thing box 3 transmission to open second casing 101 voluntarily when going out second casing 101 through the switch door mechanism that is equipped with, thermal excessive and scattered has been reduced, the further consumption that reduces the energy, thereby make the energy-conservation nature of this device greatly strengthen.
The above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. An energy-saving roller kiln is characterized by comprising:
the device comprises a first shell (1), wherein the upper end of the first shell (1) is fixedly connected with a second shell (101);
the kiln (2), the kiln (2) is installed in the second shell (101);
the two ends of the rollers (4) are respectively connected to the inner walls of the two sides of the first shell (1);
a carrier box (3), the carrier box (3) being mounted on a plurality of rollers (4);
the conveying mechanism comprises a chain (402) and a plurality of chain wheels (401), the chain wheels (401) are fixedly connected to the circumferential surfaces of the rollers (4), and the chain (402) is in transmission engagement with the circumferential surfaces of the chain wheels (401);
the door opening and closing mechanism comprises a rotating part, two first door bodies (102) and two second door bodies (103), wherein the two first door bodies (102) are movably hinged to one side end of a second shell (101) through hinges, the two second door bodies (103) are movably hinged to the other side end of the second shell (101) through hinges, and the rotating part is connected with a loading box (3), the two first door bodies (102) and the two second door bodies (103) to realize automatic opening of the two first door bodies (102) and automatic closing of the two second door bodies (103); and
and the driving mechanism is connected with the conveying mechanism to realize the operation of the conveying mechanism.
2. The energy-saving roller kiln according to claim 1, characterized in that: the conveying mechanisms are provided with two groups, and the two groups of conveying mechanisms are symmetrical based on the middle point of the first shell (1).
3. The energy-saving roller kiln according to claim 2, characterized in that: the driving mechanism comprises a supporting plate (5) and a motor (501), the supporting plate (5) is fixedly connected to one side end of the first shell (1), the motor (501) is fixedly connected to one side end of the supporting plate (5), and the output end of the motor (501) movably penetrates through the inner wall of one side of the first shell (1) and is fixedly connected to one end of one of the rollers (4).
4. The energy-saving roller kiln according to claim 3, characterized in that: the rotatable parts include two spur racks (6), a plurality of gears (601) and bull stick (602), and is a plurality of bull stick (602) fixed connection respectively is in the lower extreme of two first door bodies (102) and two second door bodies (103), and is a plurality of gear (601) fixed connection respectively is in the circumference surface of a plurality of bull stick (602), two spur racks (6) fixed connection respectively is in the both sides end of carrying thing box (3), and two spur racks (6) respectively with a plurality of bull stick (602) phase-matches.
5. The energy-saving roller kiln according to claim 4, characterized in that: it is a plurality of the circumferential surface of bull stick (602) all overlaps and is equipped with torsional spring (603), and is a plurality of the one end of torsional spring (603) is fixed connection respectively in the both sides end of second casing (101), and is a plurality of the other end of torsional spring (603) is fixed connection respectively in the upper end of a plurality of gears (601).
6. The energy-saving roller kiln according to claim 5, characterized in that: the inner walls of the two sides of the first shell (1) are fixedly connected with a plurality of bearings (403), and the rollers (4) are fixedly connected to the circumferential inner walls of the bearings (403) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122657689.3U CN215002863U (en) | 2021-11-02 | 2021-11-02 | Energy-saving roller kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122657689.3U CN215002863U (en) | 2021-11-02 | 2021-11-02 | Energy-saving roller kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215002863U true CN215002863U (en) | 2021-12-03 |
Family
ID=79123262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122657689.3U Active CN215002863U (en) | 2021-11-02 | 2021-11-02 | Energy-saving roller kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215002863U (en) |
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2021
- 2021-11-02 CN CN202122657689.3U patent/CN215002863U/en active Active
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Address after: No. 2128, Section 3, Chancheng Avenue, Lingang Street, Hejiang County, Luzhou City, Sichuan Province (Lingang Industrial Park) Patentee after: Hejiang Huayi Ceramic Products Co.,Ltd. Country or region after: China Address before: Lingang Industrial Park, Hejiang County, Luzhou City, Sichuan Province (Caofeng village, Hejiang town) Patentee before: HEJIANG HUAYI CERAMIC PRODUCT CO.,LTD. Country or region before: China |