CN105271635A - Optical-glass continuous-melting production line automatic charging technology and apparatus - Google Patents

Abstract

The name of the present invention is an automatic feeding process and device for an optical glass continuous melting production line. The invention belongs to the technical field of continuous melting of optical glass. It mainly provides an automatic feeding process and device for continuously drying and dewatering batch materials for melting optical glass, and then continuously feeding them into a glass melting furnace through a ceramic screw propeller. Its main features are: including a feeding and drying device composed of a storage bin, a drying furnace and a mesh belt transmission mechanism, and a ceramic screw feeder; The spiral blade pushes the raw material to the platinum feeding port of the furnace at a constant speed and enters the melting pool. The invention integrates the drying and dewatering link and the missing injection feeding link in the feeding process on the optical glass continuous melting production line to achieve the purpose of automatic feeding, and at the same time reduces the fluctuation of the melting pool temperature and the volatilization of volatile substances, and avoids feeding Link dust, improve product quality.

Description

An automatic feeding process and device for an optical glass continuous melting production line

technical field

The invention belongs to the technical field of optical glass continuous melting. Specifically, it relates to an automatic feeding process and device for continuously adding batch materials for melting optical glass into a glass melting furnace through a ceramic screw propeller after continuous drying and dehydration.

Background technique

At present, most of the optical glass continuous melting production lines have realized automatic feeding. The feeding methods involved in the automatic feeding process mainly include timing and quantitative, timing and non-quantitative, and quantitative and non-timing, etc. These methods are all intermittent input, which will cause fluctuations in the glass liquid level in the melting pool and have a certain impact on product quality; The constant-speed continuous feeding method can maintain a stable liquid level, but because the temperature of the glass melting furnace is very high, it is impossible to establish a continuous feeding channel with conventional materials, so the continuous feeding method is rarely used.

In the research and development process of optical glass, in order to make the optical glass meet the required use requirements, during the melting process of this type of optical glass, its components contain volatile substances (these substances are basically poisonous and harmful gases), and the raw materials are in the It is easy to absorb moisture in the air to produce crystal water and affect the stability of the smelting process. It is necessary to dry the raw materials and put them into the furnace under the sealed condition of the melting pool of the furnace to solve these two problems.

Therefore, it is of good practical value to study an automatic feeding process that solves the above problems, is clean and environmentally friendly, and ensures product quality.

Contents of the invention

The purpose of the present invention is to solve an automatic feeding process and device for continuously adding the batch materials for melting optical glass into the glass melting furnace by a ceramic screw propeller after continuous drying and dehydration, so as to improve the automation level of the continuous melting technology of optical glass .

The technical solution of the automatic feeding process of the present invention is: an automatic feeding process of an optical glass continuous melting production line, which is characterized in that it includes the following process steps:

(1) Manually inject raw materials or batch materials into the storage bin;

⑵Raw materials or batch materials leak out through the outlet of the storage bin and spread them on the conveyor mesh belt of the drying furnace. ;

(3) The dried raw materials or batch materials fall from the end of the conveying mesh belt into the guide bin of the ceramic screw feeder; the ceramic screw feeder consists of a guide bin, a second reducer, a coupling, a blocking plate, a gasket, The discharge cone is composed of a casing, a casing and a screw propulsion piece. The blocking plate is fixed at the opening end of the casing, and the screw propulsion piece is located in the casing. One end of the propulsion plate is connected to the second reducer through a coupling, the upper part of the casing is connected to the outlet port of the guide bin, the lower part of the other end is connected to the discharge cone, and the discharge cone The lower end of the tube is a conical nozzle; after the dried raw materials or batch materials enter the casing from the material guide bin, they are pushed by the screw propeller to the outlet of the discharge cone tube, and then enter the melting pool through the platinum feeding port of the furnace.

The technical solution of the automatic feeding device of the present invention is: an automatic feeding device for an optical glass continuous melting production line, which is characterized in that it includes a feeding drying device and a ceramic screw feeding machine; the feeding and drying device includes a storage bin, a drying furnace and Mesh belt transmission mechanism; the mesh belt transmission mechanism includes a conveying mesh belt and a transmission wheel located in the drying furnace, a first reducer located outside the drying furnace, and the first reducer is connected to the transmission wheel through a belt; the outlet of the storage bin The material port is located above the conveyor belt after passing through the drying furnace; the ceramic screw feeder consists of a material guide bin, a second reducer, a coupling, a blocking plate, a gasket, a discharge cone, a sleeve and a screw propeller Composition; the blocking plate is fixed at the opening end of the casing, the screw propulsion piece is located in the casing, and its two ends are respectively installed on the closed end of the blocking plate and the casing through the gasket; one end of the screw propulsion piece is connected to the second through the coupling The reducer is connected, the upper feed port at one end of the casing is connected to the discharge port of the guide bin, and the discharge port at the lower end of the other end is connected to the discharge cone; the lower end of the discharge cone is a tapered nozzle; the conveyor belt The tail end is located above the guide bin.

The spiral propulsion piece described in the technical solution of the automatic feeding device of the present invention is located at the innermost side of the closed end of the casing, and the rotation direction of the other spiral pieces is opposite to that of the other spiral pieces, and is located at the discharge port of the casing.

In the technical solution of the automatic feeding device of the present invention, the upper part of the discharge conical pipe and the discharge port of the casing are connected by a taper sleeve or a flange.

The sleeve pipe, screw propeller, gasket and blocking plate described in the technical solution of the automatic feeding device of the present invention are all ceramic sleeves, ceramic spiral propellers, Ceramic gaskets and ceramic blocking plates.

The outlet of the storage bin described in the technical solution of the automatic feeding device of the present invention is a rectangular flat mouth.

The present invention adopts the feeding and drying device composed of a storage bin, a drying furnace and a mesh belt transmission mechanism; The ceramic screw feeder composed of pusher pieces, so the raw materials (batch materials) are first manually injected into the storage bin, leaked from the outlet of the storage bin and spread on the conveyor belt of the drying furnace, and the distance between the lower end of the outlet of the storage bin is adjusted The height of the mesh belt can control the thickness of the laid raw material. The length of the outlet of the storage bin can be used as the width of the raw material laid on the mesh belt. When the mesh belt of the drying furnace advances at a constant speed driven by the first reducer, it can The raw materials are evenly and stably transported to the material guide bin above the ceramic screw feeder. At this time, the temperature in the drying furnace is controlled at 160-260°C. The raw materials depend on the laying thickness and the feeding demand, by controlling the speed of the first reducer The raw materials are baked in the drying furnace for 7 to 10 hours to fully remove the moisture in the raw materials. The raw materials enter the ceramic screw feeder from the material guide bin, and the rotation of the spiral blades pushes the raw materials evenly to the furnace feeding port and enters the melting pool. The invention integrates the drying and water removal link and the missing injection feeding link in the feeding process on the optical glass continuous melting production line to achieve the purpose of automatic feeding. The raw materials are continuously dried to remove water and continuously added to the furnace to ensure the stability of the liquid level in the melting pool. The conical sealing effect between the ceramic leakage port and the platinum feeding port reduces the temperature fluctuation of the melting pool and the volatilization of volatile substances, and avoids dust in the feeding process. . The invention is mainly applicable to the automatic feeding process of the optical glass continuous melting production line.

Description of drawings

Fig. 1 is a schematic diagram of the automatic feeding device of the optical glass continuous melting production line of the present invention.

Fig. 2 is a schematic diagram of the ceramic screw feeder of the present invention.

In the figure: 1-storage bin; 2-drying furnace; 3-guide bin; 4-ceramic screw feeder; 5-platinum feeding port; 41-screw propeller; Tube; 44-gasket; 45-blocking plate; 46-coupling; 47-second reducer.

detailed description

As shown in Fig. 1 and Fig. 2, the automatic feeding device of the present invention includes a feeding drying device and a ceramic screw feeder 4. The feeding and drying device includes a storage bin 1, a drying furnace 2 and a mesh belt transmission mechanism, wherein the mesh belt transmission mechanism includes a conveying mesh belt and a transmission wheel located in the drying furnace 2, and the first one outside the drying furnace 2 Reducer, the first reducer is connected with the transmission wheel through a belt. The discharge port of the storage bin 1 is located above the conveying mesh belt after passing through the drying furnace 2, and the outlet of the storage bin 1 is a rectangular flat mouth. The length of the flat rectangular outlet of the storage bin 1 controls the width of the raw material laid on the mesh belt. The height of the lower end of the flat rectangular outlet of the storage bin 1 from the mesh belt of the drying furnace 2 is the thickness of the laid raw material. Set the first reducer After the rotation speed, the amount (volume or weight) of the drying and transporting raw materials in the drying furnace 2 can be calculated per unit time. When the mesh belt of the drying furnace 2 advances at a constant speed driven by the first reducer, the raw materials can be evenly , Stable delivery to the guide bin 3 above the ceramic screw feeder 4. The ceramic screw feeder 4 is composed of a material guide bin 3, a second speed reducer 47, a shaft coupling 46, a blocking plate 45, a gasket 44, a discharge cone 43, a casing 42 and a screw propeller 41. Wherein, the blocking plate 45 is fixed on the open end of the casing 42, the screw propulsion piece 41 is located in the casing 42, and its two ends are installed on the blocking plate 45 and the closed end of the casing 42 through the gasket 44 respectively. The screw propulsion piece 41 is located at the innermost side of the closed end of the casing 42. The rotation direction of the other spiral pieces is opposite to that of the other spiral pieces, and it is located at the outlet of the casing 42, so that the raw material can be squeezed when it is pushed to the outlet. The material inlet and outlet can reduce the extrusion force of the raw material on the bottom of the casing 42 and improve the service life of the ceramic screw feeder 4 . One end of the screw propulsion piece 41 is connected to the second reducer 47 through a coupling 46, the upper feed port of one end of the casing 42 is connected to the discharge port of the guide bin 3, and the lower discharge port of the other end is connected to the discharge cone. Tube 43 is connected. The discharge cone 43 and the casing 42 of the ceramic screw feeder 4 can be connected by a taper sleeve or a flange connection. Once the discharge cone 43 is damaged by high temperature corrosion, only some parts can be replaced to reduce production costs. . The lower end of the discharge conical tube 43 is a conical nozzle, which is conically combined with the platinum feeding port 5, which can play a sealing role, reduce the fluctuation of the temperature of the melting pool and the volatilization of volatile substances, and avoid dust in the feeding process. The tail end of conveying mesh belt is positioned at the top of material guide bin 3. The raw material enters the ceramic screw feeder 4 from the material guide bin 3, and the rotation of the screw propeller 41 pushes the raw material to the platinum feeding port 5 of the melting furnace and enters the melting pool. The casing 42, the screw propeller 41, the gasket 44 and the blocking plate 45 are all ceramic casings, ceramic screw propulsion pieces, ceramic gaskets and ceramic blocking plates fired from alumina with a purity of more than 99.99%. The rotational speed of the first speed reducer and the second speed reducer 47 can be adjusted, and the respective rotational speeds are set according to the feeding amount, so that the feeding amount of the drying furnace 2 and the feeding amount of the ceramic screw feeder 4 are kept in balance.

The automatic feeding process of the optical glass continuous melting production line of the present invention comprises the following process steps:

(1) Manually inject raw materials or batch materials into storage bin 1;

(2) Raw materials or batch materials are leaked from the outlet of storage bin 1 and spread on the conveying mesh belt of drying furnace 2. The temperature in drying furnace 2 is controlled at 160-260°C. The speed of the first reducer makes the raw material baked in the drying furnace 2 for 7 to 10 hours, so as to fully remove the moisture in the raw material;

(3) The dried raw materials or batch materials fall from the end of the conveying mesh belt into the material guide bin 3 of the ceramic screw feeder 4, and then enter the casing 42 from the material guide bin 3, and are pushed by the screw propeller 41 to the discharge cone The outlet of pipe 43 enters the melting pool through the platinum feeding port 5 of the melting furnace.

Claims (6)

1. an optical glass continuous melting production line self-feeding technique, is characterized in that comprising following processing step:

(1) by manually raw material or admixtion being injected storage bin (1);

(2) raw material or admixtion spill tiling on the foraminous conveyer of stoving oven through the outlet of storage bin (1), and drying in-furnace temperature is 160 ~ 260 DEG C; Raw material or admixtion toast 7 ~ 10 hours in stoving oven;

(3) the raw material after drying or admixtion fall into the guide storehouse (3) of ceramic screw charging machine (4) from foraminous conveyer tail end, ceramic screw charging machine (4) is by guide storehouse (3), second step-down gear (47), shaft coupling (46), closure plate (45), pad (44), discharging Taper Pipe (43), sleeve pipe (42) and screw propulsion sheet (41) are formed, closure plate (45) is fixed on the opening end of sleeve pipe (42), screw propulsion sheet (41) is positioned at sleeve pipe (42), its two ends are arranged on through pad (44) on the blind end of closure plate (45) and sleeve pipe (42) respectively, one end of screw propulsion sheet (41) is connected with the second step-down gear (47) through shaft coupling (46), the opening for feed on sleeve pipe (42) top, one end is connected with the port that delivers from godown of guide storehouse (3), the discharge port of the other end bottom is connected with discharging Taper Pipe (43), discharging Taper Pipe (43) lower end is the taper mouth of pipe, after raw material after oven dry or admixtion enter sleeve pipe (42) from guide storehouse (3), by screw propulsion sheet (41) rotate be pushed into discharging Taper Pipe (43) export, after through smelting furnace platinum charging opening (5) enter melt pond.

2. be exclusively used in a device for a kind of optical glass continuous melting production line self-feeding technique according to claim 1, it is characterized in that: comprise reinforced drying unit and ceramic screw charging machine (4); Reinforced drying unit comprises storage bin (1), stoving oven (2) and mesh belt transmission mechanism; Mesh belt transmission mechanism comprises the foraminous conveyer and transfer wheel that are positioned at stoving oven, and be positioned at the first step-down gear outside stoving oven, the first step-down gear is connected with transfer wheel through belt; The discharge port of storage bin (1) is through the top being positioned at foraminous conveyer after stoving oven (2); Ceramic screw charging machine (4) is made up of guide storehouse (3), the second step-down gear (47), shaft coupling (46), closure plate (45), pad (44), discharging Taper Pipe (43), sleeve pipe (42) and screw propulsion sheet (41); Closure plate (45) is fixed on the opening end of sleeve pipe (42), and screw propulsion sheet (41) is positioned at sleeve pipe (42), and its two ends are arranged on through pad (44) on the blind end of closure plate (45) and sleeve pipe (42) respectively; One end of screw propulsion sheet (41) is connected with the second step-down gear (47) through shaft coupling (46), and the opening for feed on sleeve pipe (42) top, one end is connected with the port that delivers from godown of guide storehouse (3), and the discharge port of the other end bottom is connected with discharging Taper Pipe (43); Discharging Taper Pipe (43) lower end is the taper mouth of pipe; The tail end of foraminous conveyer is positioned at the top of guide storehouse (3).

3. a kind of optical glass continuous melting production line automatic feeding device according to claim 2, it is characterized in that: the circle flight that described screw propulsion sheet (41) is positioned at sleeve pipe (42) blind end the most inboard is contrary with other flight sense of rotation, and is positioned at the discharge outlet of sleeve pipe (42).

4. a kind of optical glass continuous melting production line automatic feeding device according to Claims 2 or 3, is characterized in that: described discharging Taper Pipe (43) top and the discharge port of sleeve pipe (42) are that tapered sleeve is connected or Flange joint.

5. a kind of optical glass continuous melting production line automatic feeding device according to Claims 2 or 3, is characterized in that: described sleeve pipe (42), screw propulsion sheet (41), pad (44) and closure plate (45) porcelain bushing, ceramic screw impelling sheet, ceramic gasket and ceramic closure plate all for being fired by the aluminum oxide of purity more than 99.99%.

6. a kind of optical glass continuous melting production line automatic feeding device according to Claims 2 or 3, is characterized in that: the outlet of described storage bin (1) is the flat mouth of rectangle.