A full electric melting furnace for lead-free glass tubes for LED

Abstract

The present invention relates to the field of all-electric melting furnaces, and specifically discloses an all-electric melting furnace for lead-free glass tubes for LEDs, comprising a melting pool, a liquid flow hole and an ascending channel arranged at the bottom of the melting pool, a vertically inserted electrode is arranged in the melting pool, a cover plate is arranged at the opening of the melting pool, the upper end of the electrode is fixedly connected to the cover plate through a water jacket head, the water jacket head is connected to a water jacket pipe, the liquid flow hole is connected to a cross flow channel, the cross flow channel is communicated with the bottom of the ascending channel, and a scum collecting part and a sedimentation tank are respectively arranged at the upper and lower parts of the cross flow channel. The present invention arranges a cover plate at the opening of the melting pool, which can seal the melting pool, reduce the heat dissipation speed of the upper part of the melting pool, and improve the uniform heating of the glass liquid inside the melting pool; and a cross flow channel is arranged between the liquid flow hole and the ascending channel, and a scum collecting part and a sedimentation tank are arranged on the cross flow channel, which can collect scum and stones in the outflowing glass liquid, thereby improving the quality of the glass liquid, thereby improving the yield rate of glass products and ensuring the quality of glass products.

Description

Technical Field

[0001] The invention relates to the field of all-electric melting furnaces, in particular to an all-electric melting furnace for lead-free glass tubes for LEDs. Background Art

[0002] At present, the electrode rods of glass melting furnaces are mostly inserted from the side. The holes for inserting the electrodes are opened on the side walls and are located within the liquid level of the glass liquid. However, there are often gaps on the hole walls, and the glass liquid is prone to corrode the furnace wall from the gaps on the hole walls. When erosion occurs, the glass liquid in the AZS electric melting bricks will produce chemical reactions, resulting in quality problems such as bubbles, impurities, material contamination, and line streaks, thereby affecting the quality of the glass liquid. In addition, the erosion of the furnace wall by the glass liquid will also result in an average service life of the glass melting furnace of only 3-3.5 years, reducing the service life of the glass melting furnace. Patent No. 201010590979.4 discloses a top-inserted electrode all-electric melting furnace, comprising a melting pool, a main melting electrode, a clarification part located at the bottom of the melting pool, a liquid flow hole and an ascending path located at the side of the melting pool and connected to the liquid flow hole, wherein the main melting electrode extends from an opening at the top of the melting pool into the melting pool, and the upper part of the main melting electrode is fixed outside the melting pool. In this technical solution, a vertically inserted main melting electrode is adopted, which avoids corrosion of the electrode hole bricks, and the bottom and wall bricks of the pool are basically not corroded by the electrode, thereby extending the life of the kiln. However, in this solution, the melting pool is an open-mouth structure with a strong heat dissipation capacity, and the heat dissipation is faster at the upper part of the melting pool, resulting in uneven temperature in the upper and lower parts of the melting pool, affecting the quality of the glass liquid. In addition, when the glass liquid of the electric melting furnace is discharged into the material channel through the liquid flow hole, the stones and scum contained in the glass liquid will flow into the material channel with the glass liquid, affecting the quality of the glass liquid, reducing the yield of glass products, and affecting the quality of glass products. Summary of the invention

[0003] In view of the existing problems, the present invention provides a full-electric melting furnace for lead-free glass tubes for LEDs, in which a cover plate is arranged at the opening of the melting pool, which can seal the melting pool, reduce the heat dissipation rate of the upper part of the melting pool, and improve the uniform heating of the glass liquid inside the melting pool; and a cross flow channel is arranged between the liquid flow hole and the ascending channel, and a scum collecting part and a sedimentation tank are arranged on the cross flow channel, which can collect scum and stones in the outflowing glass liquid, thereby improving the quality of the glass liquid, thereby improving the yield of glass products, ensuring the quality of glass products, and can effectively solve the problems raised in the background technology.

[0004] To solve the above problems, the present invention adopts the following technical solutions:

[0005] A full-electric melting furnace for lead-free glass tubes for LEDs comprises a melting pool, a liquid flow hole and an ascending channel arranged at the bottom of the melting pool, a vertically inserted electrode is arranged in the melting pool, a cover plate is arranged at the opening of the melting pool, the upper end of the electrode is fixedly connected to the cover plate through a water jacket head, the water jacket head is connected to a water jacket pipe, the liquid flow hole is connected to a cross flow channel, the cross flow channel is communicated with the bottom of the ascending channel, and a scum collecting part and a sedimentation tank are respectively arranged at the upper and lower parts of the cross flow channel.

[0006] As a further solution of the present invention: the connection between the side wall and the bottom wall of the melting pool and the connection between the upper and lower walls of the cross flow channel and the bottom of the ascending channel are all chamfered structures.

[0007] As a further solution of the present invention: a feeding portion is provided on the cover plate, and a sealing cover is provided on the feeding portion.

[0008] As a further solution of the present invention: an exhaust pipe is provided on the cover plate, and the exhaust pipe is connected to the exhaust equipment.

[0009] As a further solution of the present invention: the cover plate is a silicon-based ceramic plate.

[0010] As a further solution of the present invention: the liquid flow hole is arranged to be inclined downward, and the inner top of the cross flow channel is lower than the inner bottom surface of the melting pool.

[0011] As a further solution of the present invention: the scum collecting part and the sedimentation tank are both arranged on one side of the cross flow channel close to the ascending channel.

[0012] As a further solution of the present invention: the scum collecting part is a trough structure opening downward, and a liquid blocking part is provided at the opening of the trough structure, and a liquid inlet is left between the liquid blocking part and the trough structure.

[0013] As a further solution of the present invention: the liquid blocking portion is a horizontal plate structure, and an integral frustum projection is provided at the upper end of the horizontal plate structure close to the liquid inlet.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: a cover plate is arranged at the opening of the melting pool, which can seal the melting pool, reduce the heat dissipation rate of the upper part of the melting pool, and improve the uniform heating of the glass liquid inside the melting pool; and a cross flow channel is arranged between the liquid flow hole and the ascending channel, and a scum collecting part and a sedimentation tank are arranged on the cross flow channel, which can collect scum and stones in the outflowing glass liquid, thereby improving the quality of the glass liquid, thereby improving the yield of glass products and ensuring the quality of glass products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic side view of the overall structure of a full-electric melting furnace for lead-free glass tubes for LEDs;

[0016] Figure 2A schematic diagram of the structure of a slag collecting part in a full-electric melting furnace for lead-free glass tubes for LEDs;

[0017] Figure 3 This is a schematic diagram of the overall structure of a fully electric melting furnace for lead-free glass tubes for LEDs.

[0018] In the figure: 1. melting pool; 2. liquid flow hole; 3. cross flow channel; 4. ascending channel; 5. cover plate; 6. electrode; 7. water jacket head; 8. sedimentation tank; 9. water jacket; 10. feeding part; 11. sealing cover; 12. exhaust pipe; 13. scum collecting part; 131. tank structure; 132. liquid inlet; 133. liquid blocking part; 134. frustum protrusion. DETAILED DESCRIPTION

[0019] 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.

[0020] In this embodiment, combined with Figures 1 to 3The present embodiment is described. The present embodiment provides a full-electric melting furnace for lead-free glass tubes for LEDs, including a melting pool 1. The connection between the side wall and the bottom wall of the melting pool 1 is a chamfered structure. The streamlined chamfered structure without dead angles is adopted to prevent the glass liquid from being blocked and deposited, forming defects such as stripes, crystals, and stones and being brought into the working liquid flow. The bottom of the melting pool 1 is located at the chamfered structure and is connected to a downwardly inclined liquid flow hole 2. The liquid flow hole 2 is connected to a cross flow channel 3. The connection between the upper and lower walls of the cross flow channel 3 and the bottom of the ascending channel 4 are all chamfered structures, which can prevent the glass liquid from being affected. To block deposition and ensure the quality of molten glass, the inner top of the cross flow channel 3 is lower than the inner bottom of the melting pool 1, the cross flow channel 3 is connected to the ascending channel 4, and the ascending channel 4 is connected to the cross flow channel 3. The melting pool 1 is an open structure and a cover plate 5 is provided at the opening. The bottom surface of the cover plate 5 is higher than the glass surface of the molten glass. A camera wrapped by a transparent insulation board is installed on the cover plate 5. The camera is a high-definition camera that can observe the electric melting glass in real time. The temperature of the glass liquid surface is generally less than 100°C. When the temperature is higher than 100°C, the current and voltage of the electrode are adjusted. The cover plate 5 is made of a silicon-based ceramic plate. The cover plate 5 is connected to the melting pool 1 in a lifting manner, and the cover plate 5 is connected to the lifting structure. When raw materials need to be added, the lifting structure drives the cover plate 5 to rise. An electrode 6 is vertically inserted in the melting pool 1. The electrode 6 is a molybdenum electrode. The upper end of the electrode 6 is fixedly connected to the cover plate 5 through a water jacket head 7. The water jacket head 7 is connected to a water jacket pipe 9. A feeding part 10 is provided on the cover plate 5. The feeding part 10 is used to add supplementary materials to the melting pool 1, and a sealing cover 11 is provided on the feeding part 10. After the feeding is completed, it can be sealed. An exhaust pipe 12 is also provided on the cover plate 5. The exhaust pipe 12 is connected to a vacuum device. The vacuum device can be a vacuum machine. During the melting process, negative pressure vacuuming can be used to extract the gas in the melting pool 1 to avoid bubbles in the glass liquid.

[0021] like Figure 1-2 As shown, a scum collecting portion 13 and a sedimentation tank 8 are respectively provided at the upper and lower ends of one side of the cross flow channel 3 close to the ascending channel 4. During the flow of the glass liquid, the scum floating on the glass liquid is collected by the scum collecting portion 13, and the stones in the glass liquid are collected by the sedimentation tank 8, thereby further improving the quality of the glass liquid and the yield rate of glass products. The scum collecting portion 13 is a downwardly opening trough structure 131, and a liquid blocking portion 133 is provided at the opening of the trough structure 131, and a liquid inlet 132 is left between the liquid blocking portion 133 and the trough structure 131. The liquid blocking portion 133 is a horizontal plate structure, and a frustum protrusion 134 connected as one body is provided at the upper end of the horizontal plate structure close to the liquid inlet 132. The scum in the glass liquid enters the trough structure 131 through the liquid inlet 132, and the conical protrusion is used to block the scum, thereby improving the scum collection efficiency. The trough structure 131 and the sedimentation tank 8 are both built with insulation bricks, and the liquid blocking portion 133 is made of silicon-based ceramics.

[0022] The working principle of the present invention is as follows: a vertically inserted electrode 6 is used in the melting pool 1, which can avoid the corrosion of the electrode hole bricks by the glass liquid, and the pool bottom and pool wall bricks will not be corroded by the electrode 6, so that the life of the kiln is extended, and a cover plate 5 is arranged at the opening of the melting pool 1, which can seal the melting pool 1, reduce the heat dissipation rate of the upper part of the melting pool 1, and improve the uniform heating of the glass liquid inside the melting pool 1; and a cross flow channel 3 is arranged between the liquid flow hole 2 and the ascending channel 4, and a scum collecting part 13 and a sedimentation tank 8 are arranged on the cross flow channel 3, which can collect scum and stones in the outflowing glass liquid, improve the quality of the glass liquid, thereby improving the yield of glass products and ensuring the quality of glass products.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A full-electric melting furnace for lead-free glass tubes for LEDs, comprising a melting pool, a liquid flow hole and an ascending path arranged at the bottom of the melting pool, characterized in that: A vertically inserted electrode is arranged in the melting pool, a cover plate is arranged at the opening of the melting pool, the upper end of the electrode is fixedly connected to the cover plate through a water jacket head, the water jacket head is connected to a water jacket pipe, a cross flow channel is connected to the flow hole, the cross flow channel is connected to the bottom of the ascending channel, and a scum collecting part and a sedimentation tank are arranged at the upper and lower parts of the cross flow channel respectively; The scum collecting part and the sedimentation tank are both arranged on one side of the cross flow channel close to the ascending channel; the scum collecting part is a downwardly opening trough structure, and a liquid blocking part is provided at the opening of the trough structure, and a liquid inlet is left between the liquid blocking part and the trough structure; the liquid blocking part is a horizontal plate structure, and a frustum protrusion connected as one body is provided at the upper end of the horizontal plate structure close to the liquid inlet.

2. The all-electric melting furnace for lead-free glass tubes for LEDs according to claim 1, characterized in that: The connection between the side wall and the bottom wall of the melting pool and the connection between the upper and lower walls of the cross flow channel and the bottom of the ascending channel are all chamfered structures.

3. The all-electric melting furnace for lead-free glass tubes for LEDs according to claim 1, characterized in that: The cover plate is provided with a feeding portion, and the feeding portion is provided with a sealing cover.

4. The all-electric melting furnace for lead-free glass tubes for LEDs according to claim 3, characterized in that: The cover plate is provided with an exhaust pipe which is connected to the air extraction device.

5. The all-electric melting furnace for lead-free glass tubes for LEDs according to claim 1, characterized in that: The cover plate is a silicon-based ceramic plate.

6. The all-electric melting furnace for lead-free glass tubes for LEDs according to claim 1, characterized in that: The liquid flow hole is arranged to be inclined downward, and the inner top of the cross flow channel is lower than the inner bottom surface of the melting pool.

Images