CN113899218A - Air inlet mechanism of atmosphere mesh belt furnace - Google Patents
Air inlet mechanism of atmosphere mesh belt furnace Download PDFInfo
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- CN113899218A CN113899218A CN202111106869.0A CN202111106869A CN113899218A CN 113899218 A CN113899218 A CN 113899218A CN 202111106869 A CN202111106869 A CN 202111106869A CN 113899218 A CN113899218 A CN 113899218A
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- air
- gas distribution
- air inlet
- pipe
- mesh belt
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- 238000009826 distribution Methods 0.000 claims abstract description 104
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 106
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005245 sintering Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000003116 impacting effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
- F27D2007/023—Conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Tunnel Furnaces (AREA)
Abstract
The invention discloses an air inlet mechanism of an atmosphere mesh belt furnace, which comprises: the air inlet assembly comprises a furnace wall and an air inlet pipe, the air inlet pipe is positioned on the outer side of the furnace wall, the furnace wall is provided with an air vent, and the air vent is used for enabling the air inlet pipe to be communicated with the inner side of the furnace wall; the gas distribution assembly comprises a gas distribution box connected to the inner side of the furnace wall, a gas distribution cavity communicated with the vent hole is formed in the gas distribution box, and a plurality of gas outlet holes are formed in the wall of the gas distribution box; the gas distribution assembly further comprises a gas distribution pipe, the gas distribution pipe comprises a first pipe body and a first joint arranged on the radial outer surface of the first pipe body, the first joint is communicated with the first pipe body, the first joint is located at the vent, the first pipe body is located in the gas distribution cavity, and a plurality of gas distribution ports are arranged on the radial outer surface of the first pipe body. The air inlet mechanism of the atmosphere mesh belt furnace can be conveniently manufactured and is easy to install, debug and maintain.
Description
Technical Field
The invention relates to a structure of an atmosphere mesh belt furnace, in particular to an air inlet mechanism of the atmosphere mesh belt furnace.
Background
The atmosphere mesh belt furnace is a continuous heating device and is used for sintering products.
When the mesh belt type sintering furnace is used, products are placed on the mesh belt, the mesh belt conveys the products into the furnace, and meanwhile, gas such as nitrogen can be introduced into the furnace, so that the products are in a low-oxygen state during sintering, and the product quality is guaranteed.
For providing gas, atmosphere guipure stove can set up air inlet mechanism, and air inlet mechanism sets up in the wall of guipure stove, and air inlet mechanism can set up all kinds of baffles and mesh to, with gaseous dispersion.
However, the existing air intake mechanism divides the air intake route by using a large partition plate, and then blocks the air intake route at different positions by using a small partition plate so as to adjust the flow rate, pressure and flow velocity of the intake air. The position of the small stainless steel plate to be welded is readjusted through the flow test knot of the air outlet of the air passage each time until the flow, the pressure and the flow speed of each air outlet are basically consistent. The method for adjusting the air passage of the mechanism needs to weld for many times, is troublesome, has high manufacturing difficulty and is difficult to install, debug and maintain.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an air inlet mechanism of an atmosphere mesh belt furnace, which is convenient to manufacture and easy to install, debug and maintain.
According to the embodiment of the first aspect of the invention, the air inlet mechanism of the atmosphere mesh belt furnace comprises: the air inlet assembly comprises a furnace wall and an air inlet pipe, the air inlet pipe is positioned on the outer side of the furnace wall, the furnace wall is provided with an air vent, and the air vent is used for enabling the air inlet pipe to be communicated with the inner side of the furnace wall; the gas distribution assembly comprises a gas distribution box connected to the inner side of the furnace wall, a gas distribution cavity communicated with the vent hole is formed in the gas distribution box, and a plurality of gas outlet holes are formed in the wall of the gas distribution box; the gas distribution assembly further comprises a gas distribution pipe, the gas distribution pipe comprises a first pipe body and a first joint arranged on the radial outer surface of the first pipe body, the first joint is communicated with the first pipe body, the first joint is located at the vent, the first pipe body is located in the gas distribution cavity, and a plurality of gas distribution ports are arranged on the radial outer surface of the first pipe body.
According to some embodiments of the invention, the first connector and the air inlet pipe are provided with internal threads and external threads which are screwed with each other.
According to some embodiments of the invention, the first fitting is provided with the external thread and the inlet pipe is provided with the internal thread.
According to some embodiments of the invention, the first tube is closed at both ends.
According to some embodiments of the invention, the gas distribution box is in a long strip shape, and the axial direction of the first pipe body is arranged along the length direction of the gas distribution box.
According to some embodiments of the invention, an end of the first tube is disposed in abutment with a box wall of the gas distribution box.
According to some embodiments of the invention, the orientation of the gas dividing opening is offset from the orientation of the gas outlet hole.
According to some embodiments of the invention, the gas distribution box has a top edge abutting the furnace wall, the top edge being provided with a flange fitting the furnace wall.
According to some embodiments of the invention, the furnace wall is provided with two opposite flanges between which the gas distribution box is accommodated.
According to some embodiments of the invention, the air inlet assembly and the air distribution assembly are provided with a plurality of pairs, and the diameters of the air outlet holes of the adjacent air distribution assemblies are set differently.
The air inlet mechanism of the atmosphere mesh belt furnace provided by the embodiment of the invention at least has the following beneficial effects:
according to the invention, the gas distributing pipe is arranged, so that the gas distributing pipe can replace various welding fixing partition plates, on one hand, the gas distributing pipe can be welded and manufactured in the external space, the manufacturing difficulty is low, and the shape and the size can be ensured, and on the other hand, the first joint of the gas distributing pipe is inserted into the vent for installation, so that the positioning is accurate, the installation is convenient, the adjustment and the maintenance are convenient, and the difficulty in subsequent use is reduced.
In addition, the first pipe body of the gas distribution pipe is provided with the gas distribution port, so that the gas flow from the gas inlet pipe is dispersed to the maximum extent, the gas flow is prevented from directly impacting the gas outlet holes, the gas flow uniformly passes through the gas outlet holes, the gas is ensured to be uniformly and evenly fed when entering the gas distribution box, a gas gathering area with stable gas pressure is formed in the gas distribution box, and the gas flows out through the gas outlet holes, so that the flow, the pressure and the flow rate of the gas discharged from the gas outlet holes of the gas distribution box are uniform and consistent.
In addition, the first pipe body of the gas distribution pipe is provided with the gas distribution port, the gas distribution box is provided with the gas outlet hole, the position is accurate, the hole diameter is easy to control, the gas inlet requirement can be met, readjustment is rarely needed, and the adjustment workload is reduced.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of the assembly of an air inlet mechanism of an atmosphere mesh belt furnace according to an embodiment of the invention;
FIG. 2 is an enlarged schematic structural view of a gas distribution box of an air inlet mechanism of the atmosphere mesh belt furnace shown in FIG. 1;
fig. 3 is an enlarged structure schematic diagram of a gas distribution pipe of the gas inlet mechanism of the atmosphere mesh belt furnace shown in fig. 1.
Reference numerals: 100-air inlet assembly, 110-furnace wall, 120-air inlet pipe, 130-air vent, 140-air distribution assembly, 150-air distribution box, 160-air distribution chamber, 170-air outlet hole, 180-air distribution pipe, 190-first pipe body, 200-first joint, 210-air distribution port, 220-external thread, 230-flanging and 240-flanging.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An air intake mechanism of an atmosphere mesh belt furnace according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of an air intake mechanism for an atmospheric mesh belt furnace is provided.
Structurally, the present embodiment has several sets of air intake assemblies 100 and air distribution assemblies 140, and one air intake assembly 100 and one air distribution assembly 140 are used in cooperation, so that multiple zones of air intake and air distribution are formed, and the product in the atmosphere belt furnace is isolated from the air.
The adjacent gas distribution assemblies 140 can be arranged differently, such as the number and size of the apertures, so as to meet the actual use requirement.
Specifically, the air inlet assembly 100 comprises an oven wall 110 and an air inlet pipe 120, wherein the air inlet pipe 120 is positioned on the outer side of the oven wall 110, the oven wall 110 is provided with an air vent 130, and the air vent 130 is used for enabling the air inlet pipe 120 to be communicated with the inner side of the oven wall 110.
That is, the gas required by the atmosphere mesh belt furnace enters the furnace through the gas inlet pipe 120, thereby isolating the product from air or oxygen and meeting the sintering requirement.
For the connection of the furnace wall 110 and the gas inlet tube 120, welding is preferably used, which is strong, reliable and well sealed.
The furnace wall 110 may be a top wall, a side wall or a bottom wall of the atmosphere mesh belt furnace, and is preferably made of steel, but may contain other materials, and may be increased as necessary.
As for the number of the intake pipes 120, the number of the intake pipes 120 may be more than one, thereby realizing a plurality of intake air, forming a long-path atmosphere space.
Referring to fig. 2, the gas distribution assembly 140 includes a gas distribution box 150 connected to the inner side of the furnace wall 110, a gas distribution chamber 160 communicating with the air vent 130 is formed inside the gas distribution box 150, and a plurality of air outlet holes 170 are formed in the wall of the gas distribution box 150.
Therefore, the gas in the gas inlet pipe 120 can enter the gas distribution chamber 160 after passing through the vent 130, and then the gas enters the atmosphere mesh belt furnace through the gas outlet 170.
Due to the arrangement of the plurality of gas outlets 170, the gas is dispersed into a plurality of streams, which are distributed around the product in a more uniform manner.
In appearance, the gas distribution box 150 is in a long strip shape, so that the gas distribution box can cross a mesh belt of the atmosphere mesh belt furnace, and therefore, the uniform distribution of inlet gas is realized in the width direction of the mesh belt.
Accordingly, the furnace wall 110 is provided with two opposing flanges 240, and the gas distribution box 150 is received between the two flanges 240.
Thus, it can be appreciated that by disposing the gas distribution box 150 between the two flanges 240, the gas distribution box 150 can be conveniently positioned and installed, and the gas distribution box 150 can be prevented from being skewed.
In the manufacturing process, the gas distribution box 150 can be formed by bending plates, so that the manufacturing difficulty and the manufacturing cost are reduced.
In some preferred embodiments, the gas distribution box 150 may be provided with a top edge abutting the furnace wall 110, the top edge being provided with a flange 230 that conforms to the furnace wall 110.
Thus, the present embodiment can connect the furnace wall 110 through the flanging 230, such as bolting, welding, etc., thereby eliminating the need for arranging the top cover on the gas distribution box 150, simplifying the structure, and facilitating subsequent maintenance.
Referring to fig. 3, the gas distribution assembly 140 further includes a gas distribution pipe 180, the gas distribution pipe 180 includes a first pipe 190 and a first joint 200 disposed on a radial outer surface of the first pipe 190, the first joint 200 is communicated with the first pipe 190, and a plurality of gas distribution ports 210 are disposed on the radial outer surface of the first pipe 190.
In use, the first connector 200 is positioned at the vent 130 and the first tube 190 is positioned at the air-separating chamber 160.
Therefore, the gas in the gas inlet pipe 120 firstly enters the first joint 200, then enters the first pipe 190, and then enters the gas distribution chamber 160 through the gas distribution port 210, so that a stable gas pressure region is formed, the gas cannot directly flow from the vent 130 to the gas outlets 170, the gas flow is prevented from directly impacting the gas outlets 170, and the gas can be uniformly discharged from each gas outlet 170.
To sum up, this embodiment is through setting up gas-distributing pipe 180 to, gas-distributing pipe 180 can replace various welded fastening baffles, and on the one hand, gas-distributing pipe 180 can weld and make in outside space, and the manufacturing degree of difficulty is low, and moreover, shape and size can obtain guaranteeing, and on the other hand, first joint 200 of gas-distributing pipe 180 inserts vent 130 and installs, and the location is accurate, and simple to operate also conveniently adjusts and maintains, reduces the degree of difficulty of follow-up use.
In addition, in the present embodiment, the air distribution port 210 is disposed on the first tube 190 of the air distribution tube 180, so that the airflow from the air inlet tube 120 is dispersed to the maximum, the airflow is prevented from directly impacting the air outlet holes 170, a stable air pressure region is formed in the air distribution chamber 160, and the airflow uniformly passes through the air outlet holes 170, thereby ensuring uniform and balanced air inlet.
That is, it can be ensured that the air flows enter the air distribution box 150 uniformly and uniformly, an air gathering region with stable air pressure is formed in the air distribution box 150, and then flows out through each air outlet 170, so that the flow, pressure and flow rate of the air discharged from each air outlet 170 of the air distribution box 150 are uniform and consistent.
In addition, this embodiment sets up gas distribution port 210 at gas distribution pipe 180's first body 190, sets up venthole 170 at gas distribution box 150, and the position is accurate, the aperture is easily controlled, can satisfy the demand of admitting air, and the adjustment need be readjusted seldom, reduces adjustment work load.
In some preferred embodiments, the first connector 200 and the air inlet pipe 120 may be provided with internal and external threads 220 screwed to each other.
Feasible, first joint 200 sets up the internal thread, and intake pipe 120 sets up external screw thread 220, and processing is convenient, but needs the sealed of strengthening first joint 200 and vent 130, avoids gaseous leakage.
In some preferred embodiments, the first connector 200 may be provided with external threads 220 and the air inlet conduit 120 may be provided with internal threads.
Therefore, the internal thread of the inlet pipe 120 may extend the length of the first connector 200 to facilitate fixing the gas distribution pipe 180, and the screw-fitting of the inlet pipe 120 and the first connector 200 may not be obstructed.
In some preferred embodiments, the first tube 190 may be closed at both ends.
It can be understood that, the two ends of the first tube 190 are closed in this embodiment, so as to prevent the two ends of the first tube 190 from being opened, thereby preventing the gas from flowing out rapidly and avoiding the difference of the gas flow along the axial direction of the first tube 190.
The two ends of the first tube 190 can be sealed by directly welding end caps, or other matching forms are also possible.
In some preferred embodiments, since the gas distribution box 150 has a long bar shape, the axial direction of the first pipe 190 may be arranged along the length direction of the gas distribution box 150.
Therefore, it can be understood that only one gas distributing pipe 180 is provided, so that the number of parts is reduced, and the manufacturing cost is reduced.
In some preferred embodiments, an end of the first tube 190 is disposed in abutment with a box wall of the gas-distribution box 150.
Therefore, the air distribution box 150 can position the air distribution pipe 180 to prevent the air distribution pipe 180 from swinging, and moreover, the box wall of the air distribution box 150 is matched with and seals the end part of the air distribution pipe 180, so that the structure is reduced.
More excellent, the orientation of the gas distribution port 210 and the orientation of the gas outlet 170 can be offset, so that the fine gas flow of the gas distribution port 210 does not directly impact the gas outlet 170.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. An air inlet mechanism of an atmosphere mesh belt furnace, which is characterized by comprising:
the air inlet assembly (100) comprises an oven wall (110) and an air inlet pipe (120), wherein the air inlet pipe (120) is positioned on the outer side of the oven wall (110), the oven wall (110) is provided with an air vent (130), and the air vent (130) is used for enabling the air inlet pipe (120) to be communicated with the inner side of the oven wall (110);
the gas distribution assembly (140) comprises a gas distribution box (150) connected to the inner side of the furnace wall (110), a gas distribution cavity (160) communicated with the air vent (130) is formed inside the gas distribution box (150), and a plurality of air outlet holes (170) are formed in the wall of the gas distribution box (150);
the gas distribution assembly (140) further comprises a gas distribution pipe (180), the gas distribution pipe (180) comprises a first pipe body (190) and a first joint (200) arranged on the radial outer surface of the first pipe body (190), the first joint (200) is communicated with the first pipe body (190), the first joint (200) is located in the vent (130), the first pipe body (190) is located in the gas distribution cavity (160), and a plurality of gas distribution ports (210) are arranged on the radial outer surface of the first pipe body (190).
2. The air inlet mechanism of the atmosphere mesh belt furnace according to the claim 1, characterized in that an internal thread and an external thread (220) which are mutually screwed are arranged between the first connector (200) and the air inlet pipe (120).
3. The air intake mechanism of the atmosphere mesh belt furnace according to claim 2, wherein the first connector (200) is provided with the external thread (220), and the air intake pipe (120) is provided with the internal thread.
4. The air intake mechanism of an atmosphere mesh belt furnace according to claim 1, wherein both ends of the first pipe body (190) are closed.
5. The air intake mechanism of an atmosphere mesh belt furnace according to claim 1, wherein the air distribution box (150) is in a long strip shape, and the axial direction of the first pipe body (190) is arranged along the length direction of the air distribution box (150).
6. The air intake mechanism of the atmosphere mesh belt furnace according to claim 1, wherein the end of the first pipe (190) is disposed in abutment with the wall of the gas distribution box (150).
7. The air intake mechanism of an atmosphere mesh belt furnace according to claim 1, characterized in that the orientation of the air dividing port (210) is offset from the orientation of the air outlet hole (170).
8. The air inlet mechanism of the atmosphere mesh belt furnace according to the claim 1, characterized in that the air distribution box (150) is provided with a top edge abutting against the furnace wall (110), and the top edge is provided with a flanging (230) fitting against the furnace wall (110).
9. The air inlet mechanism of the atmosphere mesh belt furnace according to the claim 1, characterized in that, the furnace wall (110) is provided with two opposite folding edges (240), and the air distribution box (150) is accommodated between the two folding edges (240).
10. The air inlet mechanism of the atmosphere mesh belt furnace according to claim 1, characterized in that the air inlet assembly (100) and the air distribution assembly (140) are provided with a plurality of pairs, and the diameters of the air outlet holes (170) of the adjacent air distribution assemblies (140) are set differently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111106869.0A CN113899218A (en) | 2021-09-22 | 2021-09-22 | Air inlet mechanism of atmosphere mesh belt furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111106869.0A CN113899218A (en) | 2021-09-22 | 2021-09-22 | Air inlet mechanism of atmosphere mesh belt furnace |
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| CN113899218A true CN113899218A (en) | 2022-01-07 |
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| CN202111106869.0A Pending CN113899218A (en) | 2021-09-22 | 2021-09-22 | Air inlet mechanism of atmosphere mesh belt furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115433347A (en) * | 2022-09-13 | 2022-12-06 | 广东塑刚新材料科技有限公司 | Preparation method and equipment of polyethylene terephthalate modified material |
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Address after: 526060 plant A2, Taining Industrial Park (north side of Lingshan sewage plant), Fudong Road, Duanzhou District, Zhaoqing City, Guangdong Province Applicant after: Guangdong Haoda Intelligent Equipment Technology Co.,Ltd. Address before: 526070 After Da Deli Duan Inkstone Factory at Xintang 321 National Road, Kengkou Sucun, Dinghu District, Zhaoqing City, Guangdong Province Applicant before: ZHAOQING HAODA ELECTRICAL EQUIPMENT CO.,LTD. |
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