CN217868610U

CN217868610U - High-temperature softening furnace for optical glass

Info

Publication number: CN217868610U
Application number: CN202221358770.XU
Authority: CN
Inventors: 杨洋; 王凯
Original assignee: CHENGDU GUANGMING OPTICAL ELEMENTS CO LTD
Current assignee: CHENGDU GUANGMING OPTICAL ELEMENTS CO LTD
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-11-22
Anticipated expiration: 2032-06-01

Abstract

The utility model provides an optical glass high-temperature softening furnace with glass blanks uniformly heated all around. The high-temperature softening furnace for the optical glass comprises a frame, a heating furnace, a bearing pipe, a cylinder, a guide rod, an electrical control cabinet and a cylinder connecting plate, wherein the heating furnace is arranged on the frame, the cylinder connecting plate is connected with the cylinder, the bearing pipe is fixed on the cylinder connecting plate and penetrates through the frame and the heating furnace, one end of the guide rod is fixed with the frame, the other end of the guide rod penetrates through the cylinder connecting plate, the cylinder connecting plate can move up and down along the guide rod under the driving of the cylinder, and the temperature of the heating furnace is controlled by the electrical control cabinet. The utility model ensures that the periphery of the glass blank is directly and uniformly heated, and reduces the temperature difference among all regions; under the condition of guaranteeing the uniform temperature with the tunnel type high-temperature softening furnace, greatly shorten glass blank heating time, just the utility model discloses a high-temperature softening device of simplex position even equipment trouble appears, only can lose a product, can not cause big glass loss in batches.

Description

High-temperature softening furnace for optical glass

Technical Field

The utility model relates to a softening installation especially relates to an optical glass's high temperature softening furnace.

Background

The compression molding of the lighting aspheric optical glass refers to the following steps: heating the glass blank to the softening point temperature, placing the glass blank on a profiling table, and performing compression molding by using a corresponding mold. One of the conventional heating methods is tunnel type high temperature softening, but the heating carbon rod of the tunnel type high temperature furnace is positioned at the upper side of the glass blank to be heated, only the upper side of the glass blank is directly heated, and the rest surfaces of the glass blank can only absorb the environmental heat, so that the temperature difference between the upper side of the glass blank and the rest sides is larger. The tunnel type high-temperature softening mode lasts for about 20-30 minutes from the placement of the glass blank to the discharge of the glass blank, the time is long, and once a problem or a fault occurs, the glass placed on the whole line is wasted, so that huge loss is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an optical glass high temperature softening furnace of glass blank thermally equivalent all around is provided.

The utility model provides a technical scheme that technical problem adopted is: the high-temperature softening furnace for the optical glass comprises a frame, a heating furnace, a bearing pipe, a cylinder, a guide rod, an electrical control cabinet and a cylinder connecting plate, wherein the heating furnace is arranged on the frame, the cylinder connecting plate is connected with the cylinder, the bearing pipe is fixed on the cylinder connecting plate and penetrates through the frame and the heating furnace, one end of the guide rod is fixed with the frame, the other end of the guide rod penetrates through the cylinder connecting plate, the cylinder connecting plate can move up and down along the guide rod under the driving of the cylinder, and the temperature of the heating furnace is controlled by the electrical control cabinet.

Further, the inside firebrick body that is provided with of heating furnace, the internal portion of firebrick is cylindrical furnace, the inside multilayer electric heating wire that evenly sets up of cylindrical furnace.

Furthermore, the high-temperature resistant ceramic rod penetrates through the reserved hole of the refractory brick body to be fixed, and the electric heating wire is arranged on the high-temperature resistant ceramic rod. The electric heating wires are spirally arranged. The periphery of the refractory brick body is wrapped by high-temperature-resistant cotton, the top of the refractory brick body is provided with quartz glass, a mullite plate is placed on the quartz glass, and the bottom of the refractory brick body is provided with the mullite plate.

Furthermore, the top surface, the bottom surface and the periphery of the heating furnace all adopt stainless steel as shells, wherein the bottom surface is provided with a hole convenient for the bearing pipe to go up and down, and each shell is externally provided with an aluminum cooling plate.

Furthermore, a high-temperature resistant thermocouple is installed at the top of the heating furnace.

Further, a ceramic gasket is arranged at the top of the bearing pipe. The bearing pipe is two U-shaped pipes. The bearing pipe can be filled with cooling water.

The utility model has the advantages that: the periphery of the glass blank is directly and uniformly heated, and the temperature difference among all areas is reduced; under the condition of guaranteeing the uniform temperature with the tunnel type high-temperature softening furnace, greatly shorten glass blank heating time, just the utility model discloses a high-temperature softening device of simplex position even equipment trouble appears, only can lose a product, can not cause big glass loss in batches.

Drawings

FIG. 1 is a schematic structural view of the high-temperature softening furnace for optical glass of the present invention.

FIG. 2 is a partially enlarged schematic view of a heating furnace of the high-temperature softening furnace for optical glass according to the present invention.

FIG. 3 is a partially enlarged view of the carrier tube of the high temperature softening furnace for optical glass according to the present invention.

Detailed Description

As shown in fig. 1-2, the utility model discloses an optical glass high temperature softening furnace includes frame 1, heating furnace 2, bear tub 3, cylinder 4, guide arm 5 and electrical control cabinet 6, heating furnace 2 sets up in frame 1, bear tub 3 and fix on cylinder connecting plate 9 and pass frame 1 and heating furnace 2, cylinder 4 sets up in frame 1, cylinder connecting plate 9 links to each other with cylinder 4, guide arm 5 one end is fixed with frame 1, the other end passes cylinder connecting plate 9, make cylinder connecting plate 9 reciprocate along guide arm 5 under cylinder 4's drive, guide arm 5 plays the guide effect, electrical control cabinet 6 sets up in frame 1, electrical control cabinet 6 controls heating furnace 2 temperatures.

The refractory brick body 21 is arranged in the heating furnace 2, the heating furnace 2 can be cubic, the interior of the refractory brick body 21 is a cylindrical hearth with the inner diameter of phi 260mm, optical glass within phi 150mm can be softened, and the thickness of the refractory brick body 21 is 70-100 mm, so that the temperature in the furnace can be effectively ensured, and heat loss is prevented; the refractory brick body 21 can be a high-alumina refractory brick body, and the material does not generate dust at high temperature, so that the clean environment in the hearth can be effectively ensured; the refractory brick body 21 is integrally sintered, so that heat loss is reduced, and holes of 8mm are formed in the periphery of the furnace wall and two diagonal lines and used for mounting the electric heating wires 22; multiple layers of electric heating wires 22 are uniformly arranged in the cylindrical hearth of the refractory brick body 21, specifically, 5 layers of electric heating wires 22 can be uniformly coiled, and the height interval of each layer is 35mm, so that the stability of a temperature field in a furnace body is ensured; the high temperature resistant ceramic rod 23 crosses the reserved hole of the firebrick body 21 to be fixed, and the electric heating wire 22 is arranged on the high temperature resistant ceramic rod 23, as shown in figure 2; the electric heating wires 22 are spirally arranged and made of HRE steel, can resist the high temperature of 1300-1400 ℃, have long service life and are not easy to oxidize; m6 threaded rods are welded at two ends of the electric heating wire 22 and penetrate through the holes in the wall of the refractory brick body 21 to connect a power supply; the highest temperature in the hearth of the refractory brick body 21 can reach 1200 ℃.

The periphery of the refractory brick body 21 is wrapped by high-temperature-resistant cotton 26 for heat insulation, quartz glass 24 with the thickness of 10mm is arranged at the top of the refractory brick body for dust prevention, and a mullite plate 25 with the thickness of 50mm is placed on the quartz glass 24 for heat insulation; the bottom is also provided with a 50mm thick mullite plate 25.

The top surface, the bottom surface and six peripheral surfaces of the heating furnace 2 all adopt 310S stainless steel with the thickness of 8mm as a shell 27, wherein the bottom surface is provided with 260 multiplied by 260mm square holes, which is convenient for the lifting of the bearing pipe 3; an aluminum cooling plate 28 is arranged outside each shell 27 for cooling; the top of the heating furnace 2 is provided with a high temperature resistant thermocouple 29 for monitoring the temperature of the hearth.

The frame 1 is formed by welding 50 multiplied by 4 square steel, and the bottom is a whole steel plate; the front surface is not blocked so as to be convenient for placing and clamping the glass blank; the left side, the right side and the rear side are packaged by adopting 1mm steel plates, so that the dust intrusion in the space is reduced; an electrical control cabinet 6 is located at the rear side of the rack 1 for operation.

The bearing pipe 3 is two U-shaped pipes, the top of the bearing pipe 3 is provided with a ceramic gasket 7, a glass blank 8 is placed on the ceramic gasket 7, and cooling water with the temperature of 3-5 ℃ can be introduced into the bearing pipe 3 to reduce the temperature; the bearing pipe 3 is made of a stainless seamless steel pipe, and the cracking of the pipeline caused by the extremely large temperature difference caused by the ultrahigh heat at the outer side and the low temperature at the inner part is avoided, as shown in figure 3.

When the device works, firstly, cooling water is introduced into the bearing pipe 3, and whether water leaks from each interface and each pipeline on the aluminum cooling plate 28 of the heating furnace 2 is checked; setting temperature on an instrument of the electric control cabinet 6, and starting heating; after heating to the set temperature, keeping the temperature in the heating furnace 2 constant, and then placing a glass blank 8 on the ceramic gasket 7; setting heating time and starting, wherein the bearing pipe 3 slowly raises the glass blank 8 into a hearth of the heating furnace 2 under the driving of the cylinder 4 after starting; after the heating time of the glass blank 8 is finished, the bearing pipe 3 is slowly lowered to the original position under the driving of the cylinder 4; and taking out the heated glass blank 8 and then pressing.

Claims

1. Optical glass high temperature softening furnace, its characterized in that: including frame (1), heating furnace (2), carrier tube (3), cylinder (4), guide arm (5), electrical control cabinet (6) and cylinder connecting plate (9), heating furnace (2) set up in frame (1), cylinder connecting plate (9) link to each other with cylinder (4), carrier tube (3) are fixed on cylinder connecting plate (9) and are passed frame (1) and heating furnace (2), guide arm (5) one end is fixed with frame (1), and cylinder connecting plate (9) are passed to the other end, make cylinder connecting plate (9) can reciprocate along guide arm (5) under the drive of cylinder (4), electrical control cabinet (6) control heating furnace (2) temperature.

2. An optical glass high-temperature softening furnace as claimed in claim 1, wherein: the heating furnace (2) is internally provided with a firebrick body (21), the firebrick body (21) is internally provided with a cylindrical hearth, and the cylindrical hearth is internally and uniformly provided with a plurality of layers of electric heating wires (22).

3. An optical glass high-temperature softening furnace as claimed in claim 2, wherein: the high-temperature resistant ceramic rod (23) crosses the reserved hole of the refractory brick body (21) to be fixed, and the electric heating wire (22) is arranged on the high-temperature resistant ceramic rod (23).

4. An optical glass high-temperature softening furnace as claimed in claim 2, wherein: the electric heating wires (22) are spirally arranged.

5. An optical glass high-temperature softening furnace as claimed in claim 2, wherein: the periphery of the refractory brick body (21) is wrapped by high-temperature-resistant cotton (26), the top of the refractory brick body is provided with quartz glass (24), and a mullite plate (25) is placed on the quartz glass (24).

6. An optical glass high-temperature softening furnace as claimed in claim 1, wherein: the top surface, the bottom surface and the periphery of the heating furnace (2) are made of stainless steel as shells (27), wherein holes facilitating lifting of the bearing pipes (3) are formed in the bottom surface, and an aluminum cooling plate (28) is arranged outside each shell (27).

7. An optical glass high-temperature softening furnace as claimed in claim 1, wherein: and a high-temperature-resistant thermocouple (29) is arranged at the top of the heating furnace (2).

8. An optical glass high-temperature softening furnace as claimed in claim 1, wherein: and a ceramic gasket (7) is arranged at the top of the bearing pipe (3).

9. An optical glass high-temperature softening furnace as claimed in claim 1, wherein: the bearing pipe (3) is two U-shaped pipes.

10. An optical glass high-temperature softening furnace as claimed in claim 1, wherein: the bearing pipe (3) can be filled with cooling water.