CN118637812A - A glass-ceramic dispensing and forming device - Google Patents

Abstract

The invention discloses a microcrystalline glass distribution and forming device, which comprises a distribution forming furnace, wherein refractory materials are filled in the distribution forming furnace, a flow passage for glass flow forming is formed between the refractory materials and the distribution forming furnace, a glass liquid feeding device is arranged at the top of the flow passage, a distribution lip brick is arranged in the flow passage and positioned at the corner of the refractory materials, a high-pressure burner is arranged between the inner walls of the distribution forming furnace and positioned in the flow passage, and the high-pressure burner comprises a main burner and an auxiliary burner. According to the microcrystalline glass distribution and forming device, through the arrangement of the distribution lip bricks, the microcrystalline glass forming temperature interval and the glass liquid residence time are shortened, the problem of glass body crystallization in advance caused by temperature and residence time fluctuation is effectively avoided, and accordingly the forming efficiency and the finished product quality of microcrystalline glass are improved.

Description

A glass-ceramic dispensing and forming device

Technical Field

The present invention relates to the technical field of glass manufacturing, and in particular to a microcrystalline glass distributing and forming device.

Background Art

Glass-ceramics is a new type of glass material with excellent performance and wide application. The technical difficulty of glass-ceramics production lies in the technical control during the melting and forming process.

At present, the main methods used for microcrystalline glass are sintering, calendering and float processes. Some products need to undergo secondary processing before they can be used. In the process of forming microcrystalline glass, special emphasis is placed on the changes in viscosity and temperature. If the forming temperature is close to the crystallization temperature range, the glass body is very likely to crystallize prematurely with the fluctuation of temperature and residence time, and the forming process of microcrystalline glass cannot be completed. After continuous exploration, technicians have continuously optimized the process and control methods, but still cannot completely overcome the problem of crystallization in the forming process of microcrystalline glass. In this regard, we have proposed a microcrystalline glass distribution and forming device to solve the above problem.

Summary of the invention

In view of the deficiencies in the prior art, the present invention provides a glass-ceramic distribution and forming device, which solves the problems raised in the background technology.

To achieve the above objectives, the present invention is implemented through the following technical solutions: a microcrystalline glass distribution and forming device, including a distribution and forming furnace, the interior of the distribution and forming furnace is filled with refractory materials, a flow channel for glass flow forming is formed between the refractory materials and the distribution and forming furnace, a glass liquid feeding device is arranged on the top of the flow channel, a distribution lip brick is installed in the flow channel and at the corner of the refractory material, a high-pressure burner is arranged between the inner walls of the distribution and forming furnace and located in the flow channel, the high-pressure burner includes a main burner and an auxiliary burner, the high-pressure burner blows thin the glass liquid spread on the distribution lip brick, a high-pressure gas injection device is arranged on one side of the inner wall of the distribution and forming furnace, the high-pressure gas injection device sprays high-pressure gas to purge the glass liquid remaining in the horizontal section of the distribution lip brick, and a width adjustment control component for controlling the width of the glass band formed by the glass liquid is also arranged between the distribution lip brick and the distribution and forming furnace.

Preferably, the width adjustment control assembly comprises two limit plates slidably connected to the inclined section of the distribution lip brick, and a bidirectional screw rod is rotatably connected between the inner walls of the distribution forming furnace.

Preferably, one end of the bidirectional screw rod passes through the two limiting plates and extends to the outside of the limiting plates, and the inner surfaces of the two limiting plates are threadedly connected to the outer surface of the bidirectional screw rod.

Preferably, a motor is fixed on one side of the distribution and forming furnace, and the motor drives the bidirectional screw to rotate.

Preferably, a heating device is further provided in the flow channel, and the heating device is divided into a plurality of zones in the transverse direction to heat the glass ribbon and adjust the transverse temperature difference.

Preferably, a sealing cover plate is installed at the bottom of the flow channel, and the sealing cover plate is formed by stacking two pieces of refractory materials, and a resistance wire is sandwiched between the two pieces of refractory materials.

Preferably, a through hole is formed through the center of the sealing cover plate, and a glass ribbon formed after the glass liquid is heated passes through the through hole.

Preferably, an exhaust pipe is provided in the distribution and forming furnace, the top end of the exhaust pipe penetrates the refractory material and the distribution and forming furnace and extends to the outside of the distribution and forming furnace, the bottom end of the exhaust pipe extends to the inside of the flow channel, and an automatic pressure regulating valve is installed on the exhaust pipe.

The present invention provides a glass-ceramic distribution and forming device. Compared with the prior art, it has the following beneficial effects:

(1) By setting up the lip bricks, the forming temperature range of the glass-ceramics and the residence time of the glass liquid are shortened, effectively avoiding the problem of premature crystallization of the glass body caused by temperature and residence time fluctuations, thereby improving the forming efficiency of the glass-ceramics and the quality of the finished product.

(2) By using a high-pressure burner to apply high-speed airflow during the flow of molten glass, combined with the coordinated adjustment of the temperature and molten glass flow rate in the forming device, the thickness of the glass ribbon can be precisely controlled, and the microcrystalline glass thickness that meets the requirements can be produced.

(3) Through the heating device and the setting of heating element zone control, the lateral temperature difference of the glass ribbon can be accurately adjusted, which improves the energy utilization efficiency. At the same time, the exhaust pipe and automatic pressure regulating valve are equipped to effectively treat the combustion exhaust gas, maintain the constant pressure in the forming device, and reduce environmental pollution.

(4) By setting the width adjustment control component, the distance between the two limit plates on the distribution lip brick can be controlled, thereby adjusting and controlling the width of the glass liquid spread on the distribution lip brick, thereby realizing the forming of glass strips of different widths.

(5) By setting up a high-pressure gas jet device, the residual glass liquid on the horizontal section of the distribution lip brick can be purged and cleaned. Cleaning the residual glass liquid not only avoids the waste of glass liquid, but also keeps the horizontal section of the distribution lip brick flat, without affecting the spreading effect of the glass liquid.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a front view of the internal structure of the present invention;

FIG2 is a side view of the internal structure of the present invention;

FIG3 is a top view of a local structure of the present invention;

FIG4 is a front view of the main burner of the present invention;

FIG. 5 is a side view of the main burner of the present invention.

In the figure: 1. distribution forming furnace; 2. refractory material; 3. flow channel; 4. glass liquid feeding device; 5. distribution lip brick; 6. high-pressure burner; 61. main burner; 62. auxiliary burner; 7. high-pressure gas injection device; 81. limit plate; 82. bidirectional screw rod; 83. motor; 9. heating device; 10. sealing cover plate; 11. through hole; 12. exhaust pipe; 13. pressure regulating valve.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The present invention provides three technical solutions, including the following embodiments:

Example 1

Please refer to Figures 1, 2, 4 and 5, a microcrystalline glass distribution and forming device includes a distribution and forming furnace 1, the distribution and forming furnace 1 is supported by a steel shell, the upper part of the furnace body is provided with a glass liquid inlet and a smoke exhaust outlet, the bottom is provided with a glass belt outlet, the side is provided with a high-pressure burner 6 jack and a heating element installation hole, the interior of the distribution and forming furnace 1 is filled with a refractory material 2, the refractory material 2 plays a role in heat preservation and heat insulation, a flow channel 3 for glass flow forming is formed between the refractory material 2 and the distribution and forming furnace 1, a glass liquid feeding device 4 is provided on the top of the flow channel 3, and a distribution lip brick 5 is installed in the flow channel 3 and at the corner of the refractory material 2, and the distribution lip brick 5 is made of refractory material, preferably 41#AZS, preferably high zirconium brick, preferably platinum is coated on the outside of the refractory material, a horizontal section is set at the drop point, the horizontal section has a side wall away from the glass flow direction, the side wall is arc-shaped, connected to the horizontal section is an inclined section, the angle between the inclined surface and the horizontal plane is 0°-90°, connected to the inclined section is an arc section, the distance between the end point of the arc and the vertical tangent of the arc is 0-50mm, the end point of the arc is 0-50mm lower than the bottom surface of the distribution lip brick, the distribution lip brick is fixed on the furnace body of the distribution and forming device, a high-pressure burner 6 is set between the inner walls of the distribution and forming furnace 1 and located in the flow channel 3, and the high-pressure burner 6 includes a main burner 61 and an auxiliary burner 62. Burner 62, the outer side of the high-pressure burner 6 is a sleeve, generally a corundum sleeve, with a slot in the middle of the sleeve, the slot is along the center line of the sleeve, the slot length is determined according to the width of the glass ribbon, generally 50-1000mm, the slot width is 1-20mm, the slot has a trumpet-shaped guide plate, the high-pressure burner slot is 5-100mm away from the glass ribbon, the high-pressure burner 6 can be adjusted in angle, the inner side is a high-pressure spray gun, the end has two joints, respectively, natural gas and oxygen interfaces, the natural gas and oxygen introduced are mixed in the cavity, and then sprayed from the nozzle into the outer sleeve for combustion, the length of the high-pressure spray gun entering the outer sleeve can be adjusted, and the high-pressure burner The device 6 blows thin the glass liquid spread on the distribution lip brick 5, and a high-pressure gas injection device 7 is arranged on one side of the inner wall of the distribution forming furnace 1. The high-pressure gas injection device 7 sprays high-pressure gas to purge the glass liquid remaining in the horizontal section of the distribution lip brick 5. Through the setting of the high-pressure gas injection device 7, the purging and cleaning of the residual glass liquid on the horizontal section of the distribution lip brick 5 is realized. Cleaning the residual glass liquid not only avoids the waste of glass liquid, but also keeps the horizontal section of the distribution lip brick flat without affecting the spreading effect of the glass liquid. A width adjustment control component for controlling the width of the glass belt formed by the glass liquid is also arranged between the distribution lip brick 5 and the distribution forming furnace 1.

A calender can be connected below the forming device to further thin the glass-ceramic ribbon.

An annealing furnace can be connected below the forming device to anneal the microcrystalline glass ribbon.

A crystallization furnace can be connected below the forming device to crystallize the microcrystalline glass ribbon.

Example 2

On the basis of Example 1, referring to FIG. 1 and FIG. 3 , the width adjustment control assembly includes two limit plates 81 slidably connected to the inclined section of the distribution lip brick 5 , and a bidirectional screw rod 82 is rotatably connected between the inner walls of the distribution forming furnace 1 .

One end of the bidirectional screw rod 82 passes through the two limiting plates 81 and extends to the outside of the limiting plates 81 . The inner surfaces of the two limiting plates 81 are both threadedly connected to the outer surface of the bidirectional screw rod 82 .

A motor 83 is fixed to one side of the distribution forming furnace 1, and the motor 83 drives the bidirectional screw rod 82 to rotate.

By setting the width adjustment control component, the distance between the two limit plates 81 on the distribution lip brick 5 can be controlled, thereby adjusting and controlling the width of the glass liquid spread on the distribution lip brick 5, thereby realizing the forming of glass ribbons of different widths.

Example 3

On the basis of Example 2, as shown in FIG1 , a heating device 9 is further provided in the flow channel 3. After the glass ribbon is formed by the high-pressure burner 6, it flows vertically downward. The upper and lower surfaces of the glass ribbon are provided with a heating device 9, which is divided into a plurality of zones in the horizontal and vertical directions by a plurality of heating elements to heat the glass ribbon and adjust the lateral temperature difference.

A sealing cover plate 10 is installed at the bottom of the flow channel 3. The sealing cover plate 10 is used to seal the furnace opening and the opening. The sealing cover plate 10 is formed by stacking two refractory materials 2, and a resistance wire is sandwiched between the two refractory materials 2.

A through hole 11 is formed through the center of the sealing cover plate 10 , and a glass ribbon formed after the glass liquid is heated passes through the through hole 11 .

An exhaust pipe 12 is arranged in the distribution and forming furnace 1. The top end of the exhaust pipe 12 passes through the refractory material 2 and the distribution and forming furnace 1 and extends to the outside of the distribution and forming furnace 1. The bottom end of the exhaust pipe 12 extends to the inside of the flow channel 3. An automatic pressure regulating valve 13 is installed on the exhaust pipe 12.

Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

During operation, qualified microcrystalline glass liquid flows downward from the glass liquid feeding device 4 and enters the forming device. The glass liquid first flows to the horizontal section of the distribution lip brick 5 and spreads out. The spread glass liquid enters the inclined section of the distribution lip brick 5. The glass liquid is further spread out and flows obliquely downward under the action of gravity and the friction resistance of the distribution lip brick 5. When it flows to the arc inflection point of the distribution lip brick 5, the glass liquid separates from the distribution lip brick 5 and leaves the forming device vertically downward. In this process, the motor 83 is started to drive the bidirectional screw 82 to rotate, and the bidirectional screw 82 further drives the two limit plates 81 to move in opposite directions, thereby limiting the width of the glass liquid spreading. The high-pressure burners 6 are arranged on both sides of the forming device, which are divided into a main burner 61 Natural gas and oxygen are introduced into the auxiliary burner 62 from one end respectively, and the high-pressure gas generated by the combustion is ejected from the burner. When the microcrystalline glass liquid flows to the inclined section of the distribution lip brick 5, the high-pressure gas ejected from the burner at high speed acts on the glass ribbon. The main burner 61 acts laterally on the glass ribbon, and the auxiliary burner 62 can adjust its position laterally to act on a specific position. By adjusting the flow rate of natural gas and oxygen, the number and position of high-pressure burners 6, the pressure and action area of the airflow ejected by the burner are adjusted to blow the glass ribbon thin. Combined with the coordinated adjustment of the temperature in the forming device and the glass liquid flow rate, microcrystalline glass of qualified thickness is obtained, and the high-pressure gas injection device 7 is started to blow and clean the residual glass liquid on the horizontal section of the distribution lip brick 5.

The embodiments of the invention are described in detail above, but the contents are only preferred embodiments of the invention and cannot be considered to limit the scope of the invention. All equivalent changes and improvements made according to the scope of the invention should still fall within the scope of the invention.

Claims (8)

1. A microcrystalline glass distribution and forming device, comprising a distribution forming furnace (1), characterized in that: the interior of the distribution forming furnace (1) is filled with a refractory material (2), a flow channel (3) for glass flow forming is formed between the refractory material (2) and the distribution forming furnace (1), a glass liquid feeding device (4) is arranged on the top of the flow channel (3), a distribution lip brick (5) is installed in the flow channel (3) and at the corner of the refractory material (2), and a high-pressure fuel is arranged between the inner walls of the distribution forming furnace (1) and in the flow channel (3). A burner (6) is provided, wherein the high-pressure burner (6) comprises a main burner (61) and an auxiliary burner (62), wherein the high-pressure burner (6) is used to thin the glass liquid spread on the distribution lip brick (5), and a high-pressure gas injection device (7) is provided on one side of the inner wall of the distribution forming furnace (1), wherein the high-pressure gas injection device (7) sprays high-pressure gas to purge the glass liquid remaining in the horizontal section of the distribution lip brick (5), and a width adjustment control component is also provided between the distribution lip brick (5) and the distribution forming furnace (1) to control the width of the glass ribbon formed by the glass liquid. 2. A glass-ceramic distribution and forming device according to claim 1, characterized in that: the width adjustment control assembly comprises two limit plates (81) slidably connected to the inclined section of the distribution lip brick (5), and a bidirectional screw rod (82) is rotatably connected between the inner walls of the distribution and forming furnace (1). 3. A glass-ceramic distribution and forming device according to claim 2, characterized in that one end of the bidirectional screw (82) passes through the two limit plates (81) and extends to the outside of the limit plates (81), and the inner surfaces of the two limit plates (81) are threadedly connected to the outer surface of the bidirectional screw (82). 4. A glass-ceramic distribution and forming device according to claim 2, characterized in that a motor (83) is fixed on one side of the distribution and forming furnace (1), and the motor (83) drives the bidirectional screw rod (82) to rotate. 5. A glass-ceramic distribution and forming device according to claim 1, characterized in that: a heating device (9) is also provided in the flow channel (3), and the heating device (9) is divided into a plurality of zones horizontally to heat the glass ribbon and adjust the horizontal temperature difference. 6. A glass-ceramic distribution and forming device according to claim 1, characterized in that: a sealing cover plate (10) is installed at the bottom of the flow channel (3), and the sealing cover plate (10) is formed by stacking two pieces of refractory materials (2), and a resistance wire is sandwiched between the two pieces of refractory materials (2). 7. A glass-ceramic distribution and forming device according to claim 6, characterized in that: a through hole (11) is provided through the center of the sealing cover plate (10), and a glass ribbon formed after the glass liquid is heated passes through the through hole (11). 8. A microcrystalline glass distribution and forming device according to claim 1, characterized in that: an exhaust pipe (12) is provided in the distribution and forming furnace (1), the top end of the exhaust pipe (12) penetrates the refractory material (2) and the distribution and forming furnace (1) and extends to the outside of the distribution and forming furnace (1), the bottom end of the exhaust pipe (12) extends to the inside of the flow channel (3), and an automatic pressure regulating valve (13) is installed on the exhaust pipe (12).