CN220265557U - A kind of glass kiln lip brick - Google Patents

Abstract

The utility model relates to a lip brick of a glass kiln. The lip brick is positioned between the kiln overflow port and the calendaring roller, the main body of the lip brick is a brick body, the brick body and the calendaring roller are arranged in parallel, and the brick body is provided with: a bottom surface, an overflow port surface, an outer end surface and a side cambered surface; the surface of the upper end face is smoothly heightened from the two outer end faces of the brick body to the middle part of the brick body, and the highest point is reached in the middle part of the brick body; the transition part is positioned between the side cambered surface and the upper end surface for transition; in the direction from the overflow port surface to the transition part, the heights of the points on all the upper end surfaces which are the same in distance from the same outer end surface are the same. The utility model has the advantages of reasonable structural design and capability of promoting the quick foam discharging of the overflow port after the machine changing.

Description

A kind of glass kiln lip brick

Technical field

The utility model relates to a glass kiln lip brick, in particular to a component used in an ultra-high transmittance photovoltaic rolled glass production device.

Background technique

In glass furnace technology, the lip brick is the connecting body (detachable) between the end of the straight path of the photovoltaic rolled glass melting furnace and the tail brick. It is also the final carrier of the output glass liquid from the furnace. The glass liquid in the furnace flows to the cross path branch to The end of the straight path is output through the lip brick to the upper and lower rollers of the calender for rolling and forming into photovoltaic solar glass.

At present, conventional lip bricks are commonly used for melting furnace overflows: three-section spliced flat lip bricks, with the end face and central section being the same height. In the continuous and uninterrupted production process, in order to produce photovoltaic glass that meets customer quality standards, equipment replacement between the melting furnace and the annealing furnace will occur again and again, which is called: machine replacement. During each machine replacement process, it is necessary to separate the lip brick from the outer tail brick at the end of the furnace through-pass. During this period, the residual glass on the connection surface of the outer tail brick is removed, so as to replace it with a new lip brick. In the long run, the outer tail brick at the end of the melting furnace must be separated. The tail bricks undergo thermal expansion and contraction as the temperature changes, which will lead to a certain degree of deformation of the bricks. Using conventional flat lip bricks to connect the outer tail bricks as the final carrier of the glass liquid results in the installation level of the two bricks not matching. Based on overflow, The wider the mouth, the greater the lateral temperature difference of the glass liquid, which leads to an increase in bubbles in the overflow mouth after each machine change. The bubbles are easy to accumulate and cannot be quickly discharged. If the bubble discharge time is too long, transparent bubbles and debris on the glass plate surface are likely to be produced. The formation of defects such as bubbles ultimately leads to a low glass collection rate that meets quality standards, which also affects the replacement time and increases the replacement cost.

Chinese Patent Publication No. CN104163561A discloses a lip brick, which includes a flow guide surface and a first side and a second side respectively connected to opposite sides of the flow guide surface. The flow guide surface includes a flow guide surface that is concave toward the lip brick along the direction from the first side and the second side to the middle of the flow guide surface respectively, and the flow guide surface is used to contact the glass liquid. For the above-mentioned lip brick, the guide surface in contact with the glass liquid is set as a concave surface, and the expansion amount of the lip brick when heated is reserved in advance, thereby eliminating the force generated by the thermal expansion of the lip brick, making the lip brick less likely to break or Cracks are generated and defects such as bubbles, lines and bright lines in the finished glass are eliminated. The flow guide surface described in this patent includes a flow guide surface that is concave toward the lip brick along the direction from the first side and the second side to the middle of the flow guide surface. The flow guide surface is used to contact the glass liquid and guide the flow. The surface is a curved surface, which includes multiple arcuate surfaces connected end to end. The maximum depth of the concave surface is 40mm.

① This can easily cause the amount of glass liquid in the part with a maximum depth of 40mm to be larger under the same glass liquid level, resulting in an increase in the heat brought by the glass liquid in this part. The temperature of the part with a maximum depth of 40mm is much higher than that of both sides. It is easy to cause a relatively large lateral temperature difference of the glass liquid at the overflow port, which is not conducive to the control of the rolling thickness. It is easy to cause a relatively large thickness difference of the finished glass, which has a great impact on the output and quality.

②. In addition, after the depth of the middle part of the lip brick increases, the glass liquid surface thickens, which is not conducive to the discharge of bubbles in the middle lip brick. The final result is that the lip brick will take a long time to release bubbles after changing the machine or brick, and there will be more defective products and a lower yield rate of qualified products. Low, yield loss is serious.

③ In addition, the expansion of the lip brick is caused by the expansion of the upper, lower, left and right sides. The surface of the lip brick cannot be concave to reduce the expansion. It can only be improved by the reinforcement method of fixing the lip brick.

④. The lip brick only plays a transitional role, taking over the transition of the glass liquid from the outer tail brick of the furnace to the supporting brick of the calender.

After the maximum depth of the concave surface of the lip brick is 40mm, the lip brick mouth at this part has poor fluidity due to the increase in the depth of the glass liquid level. The lip brick mouth is prone to cold glass and crystallization, which in turn increases the generation of lines and bright lines. , seriously affecting the glass yield.

Utility model content

The technical problem to be solved by this utility model is to provide a glass kiln lip brick with a reasonable structural design that promotes rapid bubble discharge from the overflow port after machine replacement.

The technical solution adopted by this utility model to solve the above technical problems is the glass kiln lip brick. The lip brick is located between the kiln overflow port and the calendering roller. The main body of the lip brick is a brick body, and the brick body Arranged parallel to the calendering roller, the brick body is provided with:

A. The bottom surface matches the bottom of the overflow port;

B. Overflow port surface, the overflow port surface is pressed against the overflow port and is in close contact with the overflow port;

C. The outer end faces are located on both sides of the brick body and match the inner edge of the overflow opening;

D. The side arc surface is located on the opposite side of the overflow surface and matches the calendering roller;

It is characterized in that: the brick body is also provided with the following parts:

E. Upper end surface, the upper end surface is located on the upper surface of the brick body, and the surface of the upper end surface is smoothly increased from the two outer ends of the brick body to the middle part of the brick body. reaches its highest point in the middle;

F. Transition part, located between the side arc surface and the upper end surface;

In the direction from the overflow surface to the transition part, all points on the upper end surface that are at the same distance from the same outer end surface have the same height.

Preferably, the brick body of the present utility model is composed of a first brick body, a second brick body, and a third brick body. The first brick body and the third brick body are symmetrically arranged on both sides, and the third brick body is symmetrically arranged on both sides. The two bricks are arranged in the middle, and the heights and shapes of the connections between the first brick, the second brick and the third brick are consistent and smoothly transition.

Preferably, the brick body of the present utility model is arranged in an integrated manner.

Preferably, the brick body of the present invention is provided with a connecting surface and a side straight surface below the side arc surface.

Preferably, the length of the brick body in the parallel direction to the calendering roller is 1.2 to 1.4 times the width of the overflow opening, the height of the brick body at the outer end surface is 160mm, and the height at the middle of the brick body is 168mm.

Preferably, the surface of the upper end surface of the utility model is smoothly increased from the two outer ends of the brick body to the middle part of the brick body, and the height of the brick body at the outer end surface of the arc is reduced by the width of the entire lip brick. 21 to 28 times, the height in the middle of the brick body is 23 to 28 times smaller than the width of the entire lip brick.

Preferably, the width of the upper end surface of the present invention is reduced by 16 to 20 times the width of the entire lip brick.

Compared with the existing technology, this utility model has the following advantages and effects:

It improves the flow of glass liquid in the middle of the lip brick, reduces the lateral temperature difference of the glass liquid at the overflow port, effectively discharges bubbles, and solves problems such as low film rewinding rate and serious production loss after machine replacement.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is a schematic structural diagram of the utility model.

Figure 2 is a schematic structural diagram of the utility model from another angle.

Figure 3 is a schematic diagram of the structure of the utility model from another angle.

Figure 4 is a schematic structural diagram of the end face of the utility model.

Figure 5 is a structural schematic diagram of the center section of the utility model.

Figure 6 is an analysis chart of the pass rate data for improved bubble conditions.

Explanation of labels: first brick body 1, second brick body 2, third brick body 3, brick body 4, upper end surface 10, overflow surface 11, side arc surface 12, connecting surface 13, lower side surface 14, outer end surface 15. Bottom surface 16, transition part 17.

Detailed ways

The present utility model will be further described in detail below in conjunction with the examples. The following examples are explanations of the present utility model, but the present utility model is not limited to the following examples.

Example 1:

As shown in Figures 1 to 5, this embodiment introduces a glass kiln lip brick. This lip brick is split and is divided into a first brick body 1, a second brick body 2, and a third brick body 3. Of course, Can be made into a whole. The first brick body 1, the second brick body 2, and the third brick body 3 together form a brick body 4. The width of each lip brick is 1400mm, and the width of the entire brick body is 4200mm. The height of the middle cross-section of the second brick body 2 in the middle section is h1, h1 = 168mm, as shown in Figure 5; the height of the lowest point on both sides of the first brick body 1 and the third brick body 3 is h2, h2 = 160mm, as shown in the figure As shown in 4; the three sections of lip bricks are spliced together to form a convex arc surface on the upper surface of the brick body. The convex distance in the middle of the entire lip brick is d, d=h1-h2=8mm.

The upper surface of the brick body 4 is the upper end face 10, the side close to the overflow opening is the overflow opening face 11, both sides are the outer end faces 15, the lower end is the bottom face 16, and the opposite side of the overflow opening face 11 is the side arc surface 12. The transition portion 17 is between the side arc surface 12 and the upper end surface 10 . Between the side arc surface 12 and the bottom surface 16 are a connecting surface 13 and a lower side surface 14 .

The brick body 4 is divided into three sections and is assembled horizontally and fixed on the lip brick bracket to form the arc surface of the upper end surface 10. During the machine replacement process, the brick body 4 is installed to the end of the glass liquid overflow port and the end of the furnace through-pass. The bricks are tightly fitted, and the height of the center point of the second brick body 2 is consistent with the height of the center point of the tail brick. The lip brick bracket is passed through circulating water to cool it to avoid the deformation of the bracket causing the lip brick to break and other situations that may affect the leader ( Note: The liquid glass is cut off and the gate is lifted again and the liquid glass is pulled and rolled through the upper and lower rollers to form a glass belt. This action is called a leader.) After the lip brick is used to guide the leader again, the flow direction of the glass liquid has changed to a certain extent. The glass The liquid can quickly flow from the center point to both sides, ensuring the lateral temperature difference of the entire glass liquid at the overflow port. Through continuous side fire combustion and adjustment of the traction speed ratio on both sides, the straight-through glass passage of the melting furnace during the changeover process is optimized. It is difficult to remove the bubbles formed by the liquid staying for a short time. As shown in Figure 6, the testing equipment shows that the use of this patented lip brick can quickly achieve the standard data of the recovery film pass rate.

In addition, it should be noted that the specific embodiments described in this specification may have different shapes and names of parts and components. All equivalent or simple changes based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the patent of the utility model. Those skilled in the technical field to which the present invention belongs can make various modifications or supplements to the described specific embodiments or replace them in similar ways, as long as they do not deviate from the structure of the present utility model or exceed the scope defined in the claims. The scope should all fall within the protection scope of the present utility model.

Claims (7)

1. A glass kiln lip brick. The lip brick is located between the kiln overflow and the calendering roller. The main body of the lip brick is a brick body. The brick body is arranged parallel to the calendering roller. The brick body The settings above are: A. The bottom surface matches the bottom of the overflow port; B. Overflow port surface, the overflow port surface is pressed against the overflow port and is in close contact with the overflow port; C. The outer end faces are located on both sides of the brick body and match the inner edge of the overflow opening; D. The side arc surface is located on the opposite side of the overflow surface and matches the calendering roller; It is characterized in that: the brick body is also provided with the following parts: E. Upper end surface, the upper end surface is located on the upper surface of the brick body, and the surface of the upper end surface is smoothly increased from the two outer ends of the brick body to the middle part of the brick body. reaches its highest point in the middle; F. Transition part, located between the side arc surface and the upper end surface; In the direction from the overflow surface to the transition part, all points on the upper end surface that are at the same distance from the same outer end surface have the same height. 2. The glass kiln lip brick according to claim 1, characterized in that: the brick body is composed of a first brick body, a second brick body, and a third brick body, and the first brick body and the third brick body are The bricks are arranged symmetrically on both sides, and the second brick is arranged in the middle. The heights and shapes of the connections between the first brick, the second brick and the third brick are consistent and smoothly transition. 3. The glass kiln lip brick according to claim 1, characterized in that the brick body is arranged in an integrated manner. 4. The glass kiln lip brick according to claim 1, characterized in that: a connecting surface and a side straight surface are provided below the side arc surface of the brick body. 5. The glass kiln lip brick according to claim 1, 2, 3 or 4, characterized in that: the length of the brick body in the parallel direction to the calendering roller is 1.2 to 1.4 times the width of the overflow opening, and The height of the brick body at the end face is 160mm, and the height at the middle of the brick body is 168mm. 6. The glass kiln lip brick according to claim 1, 2, 3 or 4, characterized in that: the surface of the upper end surface is smooth from the two outer ends of the brick body to the middle part of the brick body. By increasing the height, the height of the brick body at the outer end of the arc is reduced by 21 to 28 times the width of the entire lip brick, and the height of the brick body in the middle is reduced by 23 to 28 times the width of the entire lip brick. 7. The glass kiln lip brick according to claim 1, 2, 3 or 4, characterized in that the width of the upper end surface is 16 to 20 times smaller than the width of the entire lip brick.