Multi-section temperature control furnace for sintering of preform rods

Abstract

The utility model discloses a kind of multi-section temperature control furnace for preform rod sintering, including furnace body, the inside of furnace body is fixedly provided with heat preservation layer, the inside of heat preservation layer is provided with top round plate and bottom round plate, heat conduction plate is fixedly connected between top round plate and bottom round plate, the outside of top round plate and bottom round plate is all set up with T-shaped groove, T-shaped plate is inserted in the inside of T-shaped groove.The utility model is set in the inside of heat preservation layer by top round plate and bottom round plate, with T-shaped shaft bottom insertion in the inside of round hole, so that silicon-carbon heating tube can be on bottom round plate top, top round plate, can not affect the sintering work of whole to preform rod, when needing to overhaul and replace silicon-carbon heating tube, rotate by servo motor drive worm, worm wheel can drive bottom round plate, heat conduction plate and top round plate to rotate, so that the position of silicon-carbon heating tube can be mobilized, so that personnel can take work directly from cable sealed space silicon-carbon heating tube.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber preform processing technology, specifically a multi-stage temperature-controlled furnace for preform sintering. Background Technology

[0002] Optical fiber preforms are the core material for manufacturing optical fibers, and their quality directly affects the performance and transmission efficiency of the optical fibers. Cylindrical glass rods made of high-purity silica and other additives (such as germanium dioxide) are the basic material for manufacturing optical fibers. Their main function is to be drawn into extremely thin optical fibers through a drawing process for the transmission of optical signals.

[0003] According to CN211255702U, a rapid sintering device for large-size optical fiber preforms includes a furnace shell, a muffle tube, several heaters, and a loose optical fiber body. The furnace shell has an upper and lower sealing plate. The loose optical fiber body is suspended inside the furnace shell by a hanger. The muffle tube is installed inside the furnace shell, and several heaters are located on the outside of the muffle tube, forming multiple heating temperature zones corresponding to the heaters. Several infrared temperature sensors capable of detecting the temperature of the heating zones are installed on the furnace shell. This invention has advantages such as segmented temperature control during sintering to ensure small temperature deviations, high sintering efficiency, and uniform outer diameter of the loose optical fiber body after sintering. However, in this device, the heaters are fixedly installed inside the insulation layer. When the heaters are damaged or require maintenance after long-term operation, it is inconvenient for personnel to disassemble them. Therefore, we propose a multi-segment temperature-controlled furnace for preform sintering to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage temperature-controlled furnace for sintering preforms, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-segment temperature-controlled furnace for preform sintering, comprising a furnace body, an insulation layer fixedly disposed within the furnace body, a top circular plate and a bottom circular plate disposed inside the insulation layer, a heat-conducting plate fixedly connected between the top and bottom circular plates, T-slots being formed on the outer sides of both the top and bottom circular plates, T-plates being inserted into the T-slots, and the T-plates being fixedly disposed on the inner wall of the insulation layer, a circular hole being formed at the top of the bottom circular plate, a T-shaped shaft being inserted into the circular hole, a silicon carbide heating tube being fixedly connected to the T-shaped shaft via a column, the upper part of the silicon carbide heating tube being inserted into the insertion hole, the insertion hole being formed on the top circular plate, a worm gear being fixedly connected to the bottom of the bottom circular plate via an annular plate, a worm being meshed with the outer side of the worm gear, the worm being fixedly disposed at the end of the shaft of a servo motor, the servo motor being fixedly disposed on the outer side of the furnace body, and a cable sealing port being formed at the top of the furnace body.

[0006] As a further preferred embodiment of this technical solution, a heat insulation plate is provided extending from the top of the top circular plate, and the heat insulation plate abuts against the inner wall of the furnace body.

[0007] As a further preferred embodiment of this technical solution, the outer side of the T-shaped plate is attached to the inner wall of the T-shaped groove, and the outer sides of the top and bottom circular plates abut against the inner wall of the insulation layer.

[0008] As a further preferred embodiment of this technical solution, the circular holes are evenly spaced on the surface of the bottom circular plate, and the bottom edge of the T-shaped shaft is inclined.

[0009] As a further preferred embodiment of this technical solution, the worm gear and worm are isolated at the middle position between the bottom circular plate and the insulation layer, and a preformed rod can be placed inside the heat-conducting plate.

[0010] As a further preferred embodiment of this technical solution, the cables on the silicon carbide heating tube can be wrapped around the top circular plate, and the cables on the silicon carbide heating tube can be concentrated inside the cable sealing port.

[0011] This utility model provides a multi-stage temperature-controlled furnace for sintering preforms, which has the following advantages: This invention uses a top and bottom circular plate set inside the insulation layer. With the bottom of the T-shaped shaft inserted into the circular hole, the silicon carbide heating tube can be positioned on the top of the bottom circular plate and the top circular plate, without affecting the overall sintering of the preform. When the silicon carbide heating tube needs to be inspected or replaced, the worm gear is driven by a servo motor to rotate, and the worm wheel can drive the bottom circular plate, the heat-conducting plate, and the top circular plate to rotate. This allows the position of the silicon carbide heating tube to be adjusted, so that personnel can directly remove the silicon carbide heating tube from the cable sealing hole. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram of the structure of this utility model; Figure 2 This is a front sectional view of the structure of this utility model; Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure of A in the middle.

[0013] In the diagram: 1. Furnace body; 2. Insulation layer; 3. Top circular plate; 4. Bottom circular plate; 5. Heat-conducting plate; 6. T-slot; 7. T-plate; 8. Circular hole; 9. T-shaft; 10. Silicon carbide heating tube; 11. Insertion hole; 12. Worm gear; 13. Worm; 14. Servo motor. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] This utility model provides a technical solution: such as Figure 1 , Figure 2 and Figure 3 As shown in this embodiment, a multi-stage temperature-controlled furnace for sintering preformed rods includes a furnace body 1. An insulation layer 2 is fixedly disposed inside the furnace body 1. A top circular plate 3 and a bottom circular plate 4 are disposed inside the insulation layer 2. A heat-conducting plate 5 is fixedly connected between the top circular plate 3 and the bottom circular plate 4. T-shaped grooves 6 are formed on the outer sides of both the top circular plate 3 and the bottom circular plate 4. A T-shaped plate 7 is inserted into the T-shaped groove 6 and fixedly disposed on the inner wall of the insulation layer 2. A circular hole 8 is formed at the top of the bottom circular plate 4. A T-shaped shaft 9 is inserted inside the furnace body 1. A silicon carbide heating tube 10 is fixedly connected to the T-shaped shaft 9 via a column. The upper part of the silicon carbide heating tube 10 is inserted into a socket 11 located on the top circular plate 3. A worm gear 12 is fixedly connected to the bottom of the bottom circular plate 4 via an annular plate. A worm 13 is meshed with the outer side of the worm gear 12. The worm 13 is fixedly mounted on the end of the shaft of a servo motor 14. The servo motor 14 is fixedly mounted on the outside of the furnace body 1. A cable tray is located on the top of the furnace body 1. The cable on the silicon carbide heating tube 10 can be wrapped around the top circular plate 3, and the cable on the silicon carbide heating tube 10 can be concentrated inside the cable sealing opening, effectively binding long cables together and facilitating subsequent replacement of the silicon carbide heating tube 10. The top circular plate 3 and bottom circular plate 4 are set inside the insulation layer 2, and with the bottom of the T-shaped shaft 9 inserted into the circular hole 8, the silicon carbide heating tube 10 can be positioned on top of the bottom circular plate 4 and on the top circular plate 3, without affecting the overall sintering of the preform. When the silicon carbide heating tube 10 needs to be inspected or replaced, the servo motor 14 drives the worm gear 13 to rotate. The worm wheel 12 can drive the bottom circular plate 4, the heat-conducting plate 5, and the top circular plate 3 to rotate. This allows the position of the silicon carbide heating tube 10 to be adjusted, so that personnel can directly remove the silicon carbide heating tube 10 from the cable sealing hole. The furnace body 1 in this article also includes a temperature sensor. Since it is a mature existing technology, its principle and structure will not be described in detail here. Please refer to the above-mentioned comparative documents.

[0016] like Figure 2 As shown, a heat insulation plate extends from the top of the top circular plate 3 and abuts against the inner wall of the furnace body 1. The heat insulation plate can further prevent the heat inside the heat conduction plate 5 from leaking out.

[0017] like Figure 3 As shown, the outer side of the T-shaped plate 7 is attached to the inner wall of the T-shaped groove 6, and the outer sides of the top circular plate 3 and the bottom circular plate 4 abut against the inner wall of the insulation layer 2, so that the rotation of the top circular plate 3 and the bottom circular plate 4 can drive the rotation of the silicon carbide heating tube 10.

[0018] like Figure 3 As shown, the circular holes 8 are evenly spaced on the surface of the bottom circular plate 4, and the bottom edge of the T-shaped shaft 9 is inclined, which makes it easy for personnel to smoothly insert the T-shaped shaft 9 into the inside of the circular holes 8.

[0019] like Figure 3 As shown, the worm gear 12 and worm 13 are isolated at the middle position between the bottom circular plate 4 and the heat insulation layer 2. A preformed rod can be placed inside the heat-conducting plate 5, which can prevent the worm gear 12 and worm 13 from being scorched by high temperature to a certain extent.

[0020] This utility model provides a multi-stage temperature-controlled furnace for sintering preforms, the specific working principle of which is as follows: During use, the optical fiber preform can be placed inside the heat-conducting plate 5. As the silicon carbide heating tube 10 is started, it can sinter the optical fiber preform inside the heat-conducting plate 5. When the silicon carbide heating tube 10 needs to be repaired or replaced, the worm gear 13 is driven to rotate by the servo motor 14. The worm wheel 12 can drive the bottom circular plate 4, the heat-conducting plate 5 and the top circular plate 3 to rotate. This allows the position of the silicon carbide heating tube 10 to be adjusted, so that personnel can directly remove the silicon carbide heating tube 10 from the cable sealing hole.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage temperature-controlled furnace for sintering preformed rods, characterized in that: The furnace includes a furnace body (1), an insulation layer (2) is fixedly installed inside the furnace body (1), a top circular plate (3) and a bottom circular plate (4) are installed inside the insulation layer (2), a heat-conducting plate (5) is fixedly connected between the top circular plate (3) and the bottom circular plate (4), T-shaped grooves (6) are opened on the outer sides of the top circular plate (3) and the bottom circular plate (4), and T-shaped plates (7) are inserted into the T-shaped grooves (6). The T-shaped plates (7) are fixedly installed on the inner wall of the insulation layer (2), and a circular hole (8) is opened at the top of the bottom circular plate (4). A T-shaped shaft (8) is inserted into the circular hole (8). 9), the T-shaped shaft (9) is fixedly connected to the silicon carbide heating tube (10) through the column. The upper part of the silicon carbide heating tube (10) is inserted into the inside of the socket (11). The socket (11) is opened on the top circular plate (3). The bottom of the bottom circular plate (4) is fixedly connected to the worm wheel (12) through the annular plate. The worm wheel (12) is meshed with the worm (13) on the outside. The worm (13) is fixedly set at the end of the rotating shaft of the servo motor (14). The servo motor (14) is fixedly set on the outside of the furnace body (1). The top of the furnace body (1) is provided with a cable sealing port.

2. The multi-stage temperature-controlled furnace for sintering preformed rods according to claim 1, characterized in that: A heat insulation plate is provided on the top of the top circular plate (3), and the heat insulation plate abuts against the inner wall of the furnace body (1).

3. The multi-stage temperature-controlled furnace for sintering preformed rods according to claim 1, characterized in that: The outer side of the T-shaped plate (7) is attached to the inner wall of the T-shaped groove (6), and the outer sides of the top circular plate (3) and the bottom circular plate (4) abut against the inner wall of the insulation layer (2).

4. A multi-stage temperature-controlled furnace for sintering preformed rods according to claim 1, characterized in that: The circular holes (8) are evenly spaced on the surface of the bottom circular plate (4), and the bottom edge of the T-shaped shaft (9) is inclined.

5. A multi-stage temperature-controlled furnace for sintering preformed rods according to claim 1, characterized in that: The worm gear (12) and worm (13) are isolated at the middle position between the bottom circular plate (4) and the insulation layer (2), and a preform can be placed inside the heat-conducting plate (5).

6. A multi-stage temperature-controlled furnace for sintering preformed rods according to claim 1, characterized in that: The cables on the silicon carbide heating tube (10) can be wrapped around the top circular plate (3), and the cables on the silicon carbide heating tube (10) can be concentrated inside the cable sealing port.

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