CN113603337A - Photovoltaic calendering glass melting furnace and overflow port structure thereof - Google Patents
Photovoltaic calendering glass melting furnace and overflow port structure thereof Download PDFInfo
- Publication number
- CN113603337A CN113603337A CN202110903311.9A CN202110903311A CN113603337A CN 113603337 A CN113603337 A CN 113603337A CN 202110903311 A CN202110903311 A CN 202110903311A CN 113603337 A CN113603337 A CN 113603337A
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- melting furnace
- bricks
- glass melting
- overflow port
- side wall
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/26—Outlets, e.g. drains, siphons; Overflows, e.g. for supplying the float tank, tweels
- C03B5/265—Overflows; Lips; Tweels
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/01—Means for taking-off charges of molten glass
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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
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a photovoltaic rolled glass melting furnace and an overflow port structure thereof, wherein the bottom of an overflow port comprises a first bottom surface and a second bottom surface which are sequentially adjacent from the inner side to the outer side of the glass melting furnace, the first bottom surface is a part of a glass melt pool in the glass melting furnace, which is transited to the second bottom surface along the edge of the overflow port, and the first bottom surface is arranged into a slope surface structure with a low inner side and a high outer side, so that glass melt can smoothly flow to the second bottom surface along the first bottom surface when flowing out of the glass melting furnace and then overflow from the overflow port, disturbance is not easy to generate, and glass defects caused by glass melt crystallization can be reduced.
Description
Technical Field
The invention relates to a photovoltaic rolled glass melting furnace and an overflow port structure thereof, in particular to a design structure of a large-tonnage high-quality photovoltaic rolled glass melting furnace.
Background
The photovoltaic rolled glass overflow port is a glass liquid channel between a melting furnace working part (melting furnace glass molten liquid pool part) and a rolling machine, and the structural reasonability of the photovoltaic rolled glass overflow port is crucial to the production and quality of rolled glass products. With the rapid development of the photovoltaic glass industry, more requirements are put forward on a melting furnace in the production of photovoltaic rolled glass. The traditional overflow port has the problems that the glass crystallization is serious, the thickness difference of products is large, and the like, which affect the quality of glass, and has the structural problems of inconvenient operation, unstable structure and easy leakage of glass liquid.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a photovoltaic rolled glass melting furnace and an overflow port structure thereof, which can make molten glass smoothly flow out of the overflow port and reduce glass defects.
In order to realize the aim, the invention provides a photovoltaic rolled glass melting furnace, which adopts the following technical scheme: an overflow port structure of a photovoltaic rolled glass melting furnace is characterized in that the overflow port is used for flowing out glass melt from the glass melting furnace, the bottom of the overflow port comprises a first bottom surface and a second bottom surface which are sequentially adjacent from the inner side to the outer side of the glass melting furnace, the side wall of the overflow port comprises a first side wall and a second side wall which are adjacent, the first side wall is oppositely arranged on two sides of the first bottom surface, and the second side wall is oppositely arranged on two sides of the second bottom surface; the first bottom surface is set into a slope surface structure with a low inner side and a high outer side.
Preferably, the top of the overflow port comprises a flame baffle row and a top cover which are sequentially arranged from the inner side to the outer side of the glass melting furnace, the flame baffle row is driven by a first driving mechanism to move up and down or move left and right, and the top cover is driven by a second driving mechanism to move up and down or move left and right.
Preferably, the first bottom surface is formed by laying a first group of bottom bricks, the second bottom surface is formed by laying a second group of bottom bricks, and the brick joints butted by the first group of bottom bricks and the second group of bottom bricks are arranged in a staggered manner.
More preferably, the second group of bottom bricks comprises two rows of inner and outer bottom bricks which are laid in a splicing manner, and the abutted brick joints of the inner and outer bottom bricks are arranged in a staggered manner.
Furthermore, the outer side of the second group of bottom bricks is provided with a tightening screw, the tightening screw is installed on the support, and the tightening screw presses the outer-row bottom bricks of the second group of bottom bricks to the inner-row bottom bricks.
Preferably, the flame rows are built up by a row of flame blocking bricks, the roof is built up by a row of roof bricks, and the flame rows are higher than the roof.
As mentioned above, the overflow port structure of the photovoltaic rolled glass melting furnace has the following beneficial effects: in the overflow port structure of the photovoltaic rolled glass melting furnace, the bottom of the overflow port comprises a first bottom surface and a second bottom surface which are sequentially adjacent from the inner side to the outer side of the glass melting furnace, the first bottom surface is a part of a glass melt pool in the glass melting furnace, which is transited to the second bottom surface along the edge of the overflow port, and the first bottom surface is arranged into a slope surface structure with a low inner side and a high outer side, so that glass melt can smoothly flow to the second bottom surface along the first bottom surface when flowing out of the glass melting furnace and then overflow from the overflow port, disturbance is not easy to generate, and glass defects caused by glass melt crystallization can be reduced.
The invention also provides a photovoltaic rolled glass melting furnace corresponding to the overflow port structure of the photovoltaic rolled glass melting furnace, which comprises the overflow port structure of the photovoltaic rolled glass melting furnace in the technical scheme or any preferable technical scheme thereof, wherein the first bottom surface is butted with the side wall of the opening part of the glass melting furnace, the first bottom surface is formed by laying a first group of bottom bricks, the side wall of the opening part of the glass melting furnace is built by a row of side wall furnace bricks, and the butted brick joints of the side wall furnace bricks and the first group of bottom bricks are arranged in a staggered manner.
Preferably, the root of the side wall of the opening of the glass melting furnace is further provided with a buffering slope in a building mode, and bricks in the buffering slope and brick joints butted by the side wall furnace bricks are arranged in a staggered mode.
The photovoltaic rolled glass melting furnace comprises the overflow port structure of the photovoltaic rolled glass melting furnace, and certainly has the beneficial effects of the overflow port structure of the photovoltaic rolled glass melting furnace, and the details are not repeated here.
Drawings
Fig. 1 shows a three-dimensional cross-sectional view of a photovoltaic rolled glass melting furnace and an overflow port structure thereof according to the invention.
FIG. 2 is a front view of a photovoltaic rolled glass melting furnace and overflow port configuration of the invention, viewed from the side of the glass melting furnace and overflow port.
FIG. 3 is a top view of the photovoltaic calendered glass furnace and its overflow vent structure of FIG. 2.
Fig. 4 shows a cross-sectional view of the overflow arrangement at a-a in fig. 3.
Description of the element reference numerals
1 overflow outlet
2 glass melting furnace
3 first bottom surface
4 second bottom surface
5 first side wall
6 second side wall
7 keep off flame row
8 Top cover
9 first group of bottom bricks
10 second group of bottom bricks
11 inner row bottom brick
12 outer discharge bottom brick
13 jacking screw
14 support
15 side wall kiln brick
16 buffer slope
17 corner brick
18 first driving mechanism
19 second driving mechanism
20 calendering lip
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1 to 3, the present invention provides an overflow port structure of a photovoltaic rolled glass melting furnace, wherein an overflow port 1 is used for flowing a glass melt out of a glass melting furnace 2, a bottom of the overflow port 1 includes a first bottom surface 3 and a second bottom surface 4 which are adjacent in sequence from an inner side to an outer side of the glass melting furnace 2, a side wall of the overflow port 1 includes a first side wall 5 and a second side wall 6 which are adjacent, the first side wall 5 is oppositely disposed on two sides of the first bottom surface 3, and the second side wall 6 is oppositely disposed on two sides of the second bottom surface 4; the first bottom surface 3 is set into a slope surface structure with a low inner side and a high outer side.
In the overflow port structure of the photovoltaic rolled glass melting furnace, the bottom of the overflow port 1 comprises a first bottom surface 3 and a second bottom surface 4 which are sequentially adjacent from the inner side to the outer side of the glass melting furnace 2, the first bottom surface 3 is a part of a glass melt pool in the glass melting furnace 2 which is transited to the edge of the overflow port 1 and the second bottom surface 4, and the first bottom surface 3 is arranged into a slope surface structure with a low inner side and a high outer side, so that a glass melt can smoothly flow onto the second bottom surface 4 along the first bottom surface 3 and then overflow from the overflow port 1 when flowing out of the glass melting furnace 2, disturbance is not easy to generate, and glass defects caused by crystallization of the glass melt can be reduced.
In the overflow port structure of the photovoltaic rolled glass melting furnace, when glass melt flows out of the glass melting furnace 2, the glass melt flows onto the second bottom surface 4 smoothly through the gentle slope surface of the first bottom surface 3, the second bottom surface 4 is a plane, the second bottom surface 4 is close to the opening part of the overflow port 1, and the plane structure is designed to be more beneficial to smooth flow of the glass melt and reduce glass defects caused by disturbance of the glass melt.
The bottom and the lateral wall of glass melting furnace 2, the bottom and the lateral wall of overflow mouth 1 are all built by the brick, as shown in fig. 1, first bottom surface 3 is laid by first group end brick 9 and is formed, second bottom surface 4 is laid by second group end brick 10 and is formed, and glass melt temperature is very high, produces hot corrosion to the brickwork joint easily and makes the brick body impaired, and is impaired in order to reduce the brick body, as an preferred embodiment, the setting of staggering of brickwork joint of brick 10 butt joint is at the end brick 9 and the second group in the first group. Thus, the corrosion of the glass melt to the brick body can be slowed down. Referring to fig. 4, the first bottom bricks 9 and the bricks forming the first side wall 5 are embedded with each other, so that the first bottom bricks 9 and the bricks forming the first side wall 5 are tightly connected, and are not easily corroded by the molten glass due to gaps. In order to make the oral area life of overflow mouth 1 longer, the brick 10 at the bottom of the second group is including two rows of inside and outside end bricks that the concatenation was laid, and the setting of staggering of brickwork joint of two rows of inside and outside end bricks, like this, the oral area structural strength of overflow mouth 1 is higher, and the setting of staggering of brickwork joint also can slow down the corruption of glass melt to the brick body. As shown in fig. 2, the outer side of the second group of bottom bricks 10 is provided with tightening screws 13, the tightening screws 13 are mounted on the support 14, and the tightening screws 13 press the outer bottom bricks 12 of the second group of bottom bricks 10 against the inner bottom bricks 11, so that the inner bottom bricks 11 and the outer bottom bricks 12 are attached more tightly, thereby avoiding the occurrence of brick joints and improving the glass quality. Preferably, the tightening screw 13 is a countersunk head bolt. Referring to fig. 1, the inner row of bottom bricks 11 of the second group of bottom bricks 10 is close to the glass melting furnace 2, the outer row of bottom bricks 12 of the second group of bottom bricks 10 is close to the outer edge of the overflow port 1, referring to fig. 2, the outer side of the outer row of bottom bricks 12 of the second group of bottom bricks 10 is provided with a rolling lip 20, the rolling lip 20 is built by brick bodies, and the arrangement of the rolling lip 20 can enable the glass melt to flow downstream in a better transition manner. Through the design of these details make the brick body of glass melting furnace 2 and the brick body of overflow mouth 1 difficult production gap each other, the structure is more stable, and difficult seepage glass liquid of seam crossing can stabilize production and improve glass quality.
In the overflow port structure of the photovoltaic rolled glass melting furnace, the second side wall 6 is also designed into a form of building two rows of bricks inside and outside along the length direction of the overflow port 1, the second side wall 6 can move along the width direction of the overflow port 1, so that the positions of the two oppositely arranged second side walls 6 can be conveniently adjusted, the width B of the overflow port 1 (the width B of the overflow port 1 is shown in figure 3) can be adjusted, and the value of the width B of the overflow port 1 can be realized by adjusting the bricks of the second side wall 6 of the overflow port 1 when the width of a produced glass raw plate is adjusted to a larger extent; the value of the width B of the overflow port 1 is designed according to the width requirement of the produced glass original plate, the value of the width B is generally 50 to 300mm smaller than the width of the glass original plate, and the value of the width B is preferably 100mm smaller than the width of the glass original plate.
In the overflow port structure of the photovoltaic calendered glass melting furnace, the second group of bottom bricks 10 comprises an inner row of bottom bricks and an outer row of bottom bricks, the outlet position of the overflow port 1 is provided with a cutoff flashboard (not shown in the figure), when the brick body of the calendering lip 20 is normally replaced, the cutoff flashboard of the overflow port 1 is gated on the outer row of bottom bricks 12 of the second group of bottom bricks 10, and when the outer row of bottom bricks of the second group of bottom bricks 10 needs to be replaced, the cutoff flashboard can be gated on the inner row of bottom bricks 11 of the second group of bottom bricks 10.
As shown in fig. 2, the depth of the overflow 1 is H, the depth H of the overflow 1 should be designed in combination with the subsequent brick form of the calendering lip 20, the depth H is generally between 100 and 200mm, and the depth of the overflow 1 is preferably 130 mm. As shown in fig. 3, the length L of the overflow port 1 is L, the length L of the overflow port 1 should satisfy the installation operation of the overflow port flame trap 7 and the top cover 8, the value of the length L of the overflow port 1 is generally between 900 and 1200mm, and the length L of the overflow port 1 is preferably 1000 mm.
As shown in FIG. 2, in a preferred embodiment, the top of the overflow port 1 includes a flame arrester 7 and a top cover 8 which are arranged in this order from the inside to the outside of the glass melting furnace 2, the flame arrester 7 is driven by a first drive mechanism 18 to be movable up and down or right and left, the top cover 8 is driven by a second drive mechanism 19 to be movable up and down or right and left, and a mechanism such as a sling or a traveling crane can be used as the first drive mechanism 18 or the second drive mechanism 19. The opening degree of the overflow port 1 can be adjusted by designing the flame baffle 7 and the top cover 8 to move up and down or move left and right, so that the temperature of the glass liquid at the overflow port 1 is adjusted, the transverse temperature difference of the glass liquid is reduced, and the yield and the quality of the glass liquid are improved. Referring to fig. 1, the flame trap 7 is built up by a row of flame trapping bricks (bricks constituting the flame trap 7), the roof 8 is built up by a row of roof bricks (bricks constituting the roof 8), and the flame trap 7 is higher than the roof 8. Thus, the flame blocking effect of the flame blocking row 7 is better. The upper parts of the flame blocking row 7 and the top cover 8 can be respectively connected with a sliding rail, the flame blocking row 7 is connected with the first driving mechanism 18 through the sliding rail, the flame blocking row 7 can move out along the sliding rail in the left-right direction, the top cover 8 is connected with the second driving mechanism 19 through the sliding rail, and the top cover 8 can move out along the sliding rail in the left-right direction, so that the flame blocking row 7 and the top cover 8 can be conveniently replaced.
In the overflow port structure of the photovoltaic rolled glass melting furnace, a moving-out track (shown in the figure) for moving out the cut-off gate plate is arranged at the outlet position of the overflow port 1, the moving-out track of the cut-off gate plate can be shared with a slide rail of the top cover 8 or can be designed independently, preferably, the moving-out track of the cut-off gate plate is shared with the slide rail of the top cover 8, and the cut-off gate plate and the top cover 8 are arranged in a way of being in the same rail and in a different direction.
The smoother and smoother the flow of the molten glass, the smaller the disturbance, the less the molten glass is likely to form dead corners, the less the devitrification defects are likely to occur, and the better the glass quality is. Therefore, referring to fig. 1, corner bricks 17 are arranged at the corners of the glass melting furnace 2, and the corner bricks 17 are designed into an oblique chamfer structure with a blunt angle; the bottom of the side wall of the glass melting furnace 2 close to the overflow port 1 is provided with a buffer slope 16, a first bottom surface 3 in a gentle slope shape is arranged between the top of the side wall of the glass melting furnace 2 close to the overflow port 1 and the second bottom surface 4 of the overflow port 1 for transition, please refer to fig. 3, the first side walls 5 at two sides of the first bottom surface 3 are also designed into buffer slope structures which gradually shrink from the top of the side wall of the glass melting furnace 2 close to the overflow port 1 to the mouth of the overflow port 1, and through the design in the details, the disturbance of the glass melt is reduced as much as possible, so that the quality of the glass is improved. In order to ensure the glass quality, all parts of the overflow port 1 need to be reinforced with heat preservation measures, so that the temperature of the overflow port 1 in the width direction is uniform and consistent, and the transverse temperature difference of the glass plate at the overflow port 1 is reduced.
Corresponding to the overflow port structure of the photovoltaic rolled glass melting furnace, as shown in fig. 1 to 3, the invention also provides the photovoltaic rolled glass melting furnace, which comprises the overflow port structure of the photovoltaic rolled glass melting furnace according to the technical scheme or any preferable technical scheme thereof, wherein the first bottom surface 3 is butted with the side wall of the opening part of the glass melting furnace 2, the first bottom surface 3 is paved by a first group of bottom bricks 9, the side wall of the opening part of the glass melting furnace 2 is built by a row of side wall furnace bricks 15, and the butted brick joints of the side wall furnace bricks 15 and the first group of bottom bricks 9 are arranged in a staggered manner.
As shown in figure 1, a buffer slope 16 is further built at the root part of the side wall of the mouth part of the glass melting furnace 2, and brick joints between bricks in the buffer slope 16 and the side wall kiln bricks 15 are arranged in a staggered mode. Therefore, the glass melt can be prevented from invading into the brick joint to damage the brick body.
Based on the technical scheme of the embodiment, the overflow port 1 of the photovoltaic rolled glass melting furnace provided by the invention has the advantages that the passing molten glass is not easy to disturb, the glass defect caused by crystallization of the molten glass can be reduced, the overflow port 1 is simple in structure, easy to build and low in building cost.
The photovoltaic rolled glass melting furnace comprises the overflow port structure of the photovoltaic rolled glass melting furnace, and certainly has the beneficial effects of the overflow port structure of the photovoltaic rolled glass melting furnace, and the details are not repeated here.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. An overflow port structure of a photovoltaic rolled glass melting furnace is characterized in that an overflow port is used for flowing out glass melt from the glass melting furnace, the bottom of the overflow port comprises a first bottom surface and a second bottom surface which are sequentially adjacent from the inner side to the outer side of the glass melting furnace, the side wall of the overflow port comprises a first side wall and a second side wall which are adjacent, the first side wall is oppositely arranged on two sides of the first bottom surface, and the second side wall is oppositely arranged on two sides of the second bottom surface; the first bottom surface is set into a slope surface structure with a low inner side and a high outer side.
2. The overflow port structure of the photovoltaic rolled glass melting furnace as claimed in claim 1, wherein the top of the overflow port comprises a flame baffle row and a top cover which are sequentially arranged from the inner side to the outer side of the glass melting furnace, the flame baffle row is driven by a first driving mechanism to move up and down or move left and right, and the top cover is driven by a second driving mechanism to move up and down or move left and right.
3. The photovoltaic calendered glass furnace overflow port structure of claim 1 wherein the flame arrestor bank is built from a row of flame arrestor bricks and the roof is built from a row of roof bricks, the flame arrestor bank being higher than the roof.
4. The overflow vent structure of a photovoltaic calendered glass melting furnace of claim 1 wherein the first bottom surface is constructed by laying a first set of bottom bricks and the second bottom surface is constructed by laying a second set of bottom bricks, and wherein the abutting seams of the first and second sets of bottom bricks are staggered.
5. The overflow port structure of the photovoltaic calendered glass melting furnace of claim 4 wherein the second set of bottom bricks comprises two rows of bottom bricks laid in a splicing manner, and the abutting joint seams of the two rows of bottom bricks are staggered.
6. The overflow port structure of the photovoltaic calendered glass melting furnace of claim 5 wherein the second set of bottom bricks has set on the outside thereof set jacking screws mounted on the support frame, the jacking screws pressing the outer row of bottom bricks of the second set of bottom bricks against the inner row of bottom bricks.
7. A photovoltaic rolled glass melting furnace, comprising the photovoltaic rolled glass melting furnace overflow port structure of claim 1, wherein the first bottom surface is butted with the side wall of the opening part of the glass melting furnace, the first bottom surface is formed by laying a first group of bottom bricks, the side wall of the opening part of the glass melting furnace is built by a row of side wall furnace bricks, and the brick joints of the side wall furnace bricks and the first group of bottom bricks are arranged in a staggered manner.
8. The photovoltaic calendered glass melting furnace of claim 7, wherein the root of the lateral wall of the mouth of the glass melting furnace is further provided with a buffering slope, and the brick seams of the bricks in the buffering slope and the lateral wall furnace bricks are staggered.
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| CN202110903311.9A CN113603337B (en) | 2021-08-06 | 2021-08-06 | Photovoltaic calendering glass melting furnace and overflow port structure thereof |
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| CN202110903311.9A CN113603337B (en) | 2021-08-06 | 2021-08-06 | Photovoltaic calendering glass melting furnace and overflow port structure thereof |
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| CN113603337A true CN113603337A (en) | 2021-11-05 |
| CN113603337B CN113603337B (en) | 2023-03-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113830994A (en) * | 2021-11-09 | 2021-12-24 | 四平宏大液压机械制造有限公司 | Kiln for producing high-quality photovoltaic glass and novel calendaring molding overflow port |
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| CN113830994A (en) * | 2021-11-09 | 2021-12-24 | 四平宏大液压机械制造有限公司 | Kiln for producing high-quality photovoltaic glass and novel calendaring molding overflow port |
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