Heating furnace for optical fiber preform production

Abstract

The utility model relates to the technical field of optical fiber preform production, and discloses an optical fiber preform production heating furnace which comprises a base plate, an L-shaped plate is fixedly connected to the left side of the top of the base plate, a motor is fixedly connected to the top of the L-shaped plate, and the output end of the motor penetrates through the L-shaped plate and is fixedly connected with a first pinion. And one side of the outer ring of the first small gear is connected with a large gear in a meshed mode, the outer ring of the large gear is connected with two second small gears in a meshed mode, the top of the large gear is fixedly connected with a moving rod, temperature sensors which are evenly distributed are arranged on one side of the moving rod, and a cushion block is fixedly connected to the center of the top of the cushion plate. The heating head and the heating copper pipe work together, the motor is started, the moving rod drives the temperature sensor to move, when the temperature of the outer wall of the heating barrel is different, the heating copper pipe and the heating head heat the heating barrel, the temperature of the heating barrel is comprehensively detected, and the using effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical fiber preform production technical field especially relates to a kind of optical fiber preform production heating furnace. BACKGROUND

[0002] In the production process of optical fiber preform, heating furnace is widely used to heat the optical fiber preform, and the preform can be used to draw the material preform of optical fiber. The optical fiber preform is the core raw material for manufacturing quartz series optical fiber. According to the traditional naming method, four processes coexist in the current optical fiber technology market, namely OVD, VAD, MCVD and PCVD. The heating furnace is also used in the production process of optical fiber preform.

[0003] The existing heating furnace is used to place the optical fiber preform in the heating furnace and heat the optical fiber preform. During the heating process, the heating furnace is detected by a climbing chair at multiple points to complete the heating work of the heating furnace.

[0004] However, the existing heating furnace needs to heat multiple positions of the heating furnace, and the height of the heating furnace is relatively high. Therefore, a climbing chair is needed to complete the detection, which is troublesome and inefficient. To solve the above problems, a heating furnace for optical fiber preform production is proposed. UTILITY MODEL

[0005] The utility model aims to provide a heating furnace for optical fiber preform production, which solves the problem of needing to use a climbing chair to heat multiple positions of the heating furnace, which is troublesome and inefficient.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a heating furnace for optical fiber preform production, including a base plate, the top left side of the base plate is fixedly connected with an L-shaped plate, the top of the L-shaped plate is fixedly connected with a motor, the output end of the motor penetrates through the L-shaped plate and is fixedly connected with a first pinion, the outer circle of the first pinion is meshingly connected with a large gear, the outer circle of the large gear is meshingly connected with two second pinions, the top of the large gear is fixedly connected with a moving rod, the moving rod is provided with evenly distributed temperature sensors on one side, the top center of the base plate is fixedly connected with a pad, the top of the pad is fixedly connected with a heating barrel, the heating barrel wall is provided with evenly distributed heating copper pipes inside, the both ends of the heating copper pipes penetrate through the heating barrel and are fixedly connected with heating heads, the bottom of the outer wall of the heating barrel is fixedly connected with an air inlet pipe, and the air inlet pipe penetrates and extends to one side of the heating barrel, the other end of the air inlet pipe penetrates and is fixedly connected with a conveying pipe, the outer circle top of the conveying pipe is provided with evenly distributed branch pipes, the rear side of the outer circle of the heating barrel is fixedly connected with a rotating part, and the top of the rotating part is provided with a limiting assembly.

[0007] When the temperature of the heating barrel needs to be detected, the second pinion drives the gear to rotate, so that the moving rod drives the temperature sensor to move, and the temperature of the outer wall of the heating barrel is detected.

[0008] As a further description of the above technical solution: the limiting assembly includes a circular cover fixedly connected between the rotating piece, a second sliding rail fixedly connected to the front side of the circular cover, a U-shaped block slidingly connected to the inner wall of the second sliding rail, two rotating rods rotatably connected to the inner wall of the U-shaped block, two L-shaped support plates rotatably connected to one side of the two rotating rods, two support rods fixedly connected to the opposite sides of the two L-shaped support plates, two stop blocks fixedly connected to one end of the two support rods, two springs sleeved on the outer circle of the two support rods, a push block fixedly connected to the front side of the outer circle of the heating barrel, a circular plate fixedly connected to the center position of the bottom of the circular cover, and a plurality of circular blocks fixedly connected to the bottom of the circular cover.

[0009] By adopting the above technical solution, when the circular cover needs to be closed, the circular plate enters the heating barrel, and the air inlet pipe enters the circular hole, which can improve the sealing performance of the heating barrel, and the push block and the stop block can be engaged to fix the circular cover, and the closing of the circular cover is completed.

[0010] As a further description of the above technical solution: the control panel is provided on the top right side of the backing plate, and the signal receiver is provided on the front side of the control panel.

[0011] By adopting the above technical solution, the control panel can control the heating copper pipe and the heating head.

[0012] As a further description of the above technical solution: the second pinion is rotatably connected with a backing plate.

[0013] By adopting the above technical solution, the backing plate can prevent the second pinion from moving.

[0014] As a further description of the above technical solution: the bottom of the rotating piece is fixedly connected with a circular sliding rail, and the moving rod is slidingly connected to the inner wall of the circular sliding rail.

[0015] By adopting the above technical solution, the circular sliding rail can limit the movement of the moving rod, and the moving rod can drive the temperature sensor to move.

[0016] As a further description of the above technical solution: the push block and the stop block are engaged.

[0017] By adopting the above technical solution, the push block and the stop block can fix the circular cover.

[0018] As a further description of the above technical solution: the front side bottom of the circular cover is fixedly connected with a limiting box, the top of the limiting box is fixedly connected with two first sliding rails, and the inner walls of the two first sliding rails are both slidably connected with L-shaped supporting plates.

[0019] By adopting the above technical scheme, the first sliding rail can limit the L-shaped supporting plate, so that the L-shaped supporting plate is prevented from deviating.

[0020] As a further description of the above technical solution: the top of the circular cover is fixedly connected with an electromagnetic valve, and the top of the electromagnetic valve is fixedly connected with an air outlet pipe.

[0021] By adopting the above technical scheme, the electromagnetic valve is opened, and the inert gas can flow out through the air outlet pipe.

[0022] Compared with the prior art, the utility model has the advantages that:

[0023] 1. The optical fiber preform production heating furnace provided by the utility model first heats the heating copper pipe, the heating head, the large gear, the moving rod and the temperature sensor, and the heating head works together with the heating copper pipe to heat the heating barrel. The motor is started to drive the first pinion to rotate, the first pinion and the second pinion drive the large gear to rotate, the large gear drives the moving rod to move around the outer wall of the heating barrel, and the moving rod drives the temperature sensor to move to detect the temperature of the outer wall of the heating barrel. When the temperature of the outer wall of the heating barrel is different, the control panel controls the corresponding heating copper pipe and heating head to heat the heating barrel, realizes comprehensive detection of the temperature of the heating barrel, and the detection process is simple, and the use effect is improved.

[0024] 2. The optical fiber preform production heating furnace provided by the utility model is closed, the circular cover drives the circular plate into the heating barrel, the rotating rod enters the circular hole at the same time, the push block enters the limiting box, the push block extrudes the stop block, the stop block extrudes the supporting rod, the spring is compressed, and after the push block enters the stop block, the stop block and the push block are clamped to fix the circular cover. The heating barrel is sealed and closed, and the heating efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The overall structure of the utility model is shown in the figure;

[0026] Figure 2 The heating barrel structure of the utility model is shown in the figure;

[0027] Figure 3 The limiting box structure of the utility model is shown in the figure;

[0028] Figure 4 The stop block structure of the utility model is shown in the figure;

[0029] Figure 5 The heating barrel structure schematic view of the utility model.

[0030] Legend:

[0031] 1, heating barrel; 2, circular slide rail; 3, moving rod; 4, motor; 5, L-shaped plate; 6, first pinion; 7, backing plate; 8, large gear; 9, second pinion; 10, control panel; 11, signal receiver; 12, heating copper pipe; 13, heating head; 14, air outlet pipe; 15, electromagnetic valve; 16, circular cover; 17, circular plate; 18, circular hole; 19, push block; 20, rotating piece; 21, limiting box; 22, temperature sensor; 23, conveying pipe; 24, branch pipe; 25, cushion block; 26, U-shaped block; 27, rotating rod; 28, L-shaped support plate; 29, first slide rail; 30, second slide rail; 31, stop block; 32, support rod; 33, spring; 34, circular block; 35, air inlet pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0033] In order to further understand the content of the utility model, the utility model will be described in detail in combination with the drawings.

[0034] In combination with Figure 1 , the utility model discloses a heating furnace for optical fiber preform production, including backing plate 7, the right side of the top of backing plate 7 is provided with control panel 10, the front side of control panel 10 is provided with signal receiver 11, signal receiver 11 can receive the signal of temperature sensor 22, when the temperature in the heating barrel 1 is uneven, control panel 10 can control corresponding heating copper pipe 12 and heating head 13 to heat, rotating piece 20 bottom fixedly connected with circular slide rail 2, circular slide rail 2 can limit moving rod 3, prevent moving rod 3 from deviating, circular cover 16 front bottom fixedly connected with limiting box 21, limiting box 21 top is fixedly connected with two first slide rails 29, U-shaped block 26 can limit L-shaped support plate 28, circular cover 16 top is fixedly connected with electromagnetic valve 15 and passes through, electromagnetic valve 15 top is fixedly connected with air outlet pipe 14 and opens electromagnetic valve 15, the inert gas in heating barrel 1 can flow out through air outlet pipe 14.

[0035] In combination with Figure 2 and Figure 3The left side of the top of the backing plate 7 is fixedly connected with the L-shaped plate 5, the top of the L-shaped plate 5 is fixedly connected with the motor 4, the output end of the motor 4 penetrates through the L-shaped plate 5 and is fixedly connected with the first pinion 6, the outer circle of the first pinion 6 is meshingly connected with the gear 8 on one side, the L-shaped plate 5 can limit the first pinion 6, the first pinion 6 can drive the gear 8 to rotate, the outer circle of the gear 8 is meshingly connected with two second pinions 9, the top of the gear 8 is fixedly connected with the moving rod 3, the gear 8 can drive the moving rod 3 to move on the outer wall of the heating barrel 1, the moving rod 3 is provided with uniformly distributed temperature sensors 22 on one side, the temperature sensors 22 can detect the temperature of different positions of the outer wall of the heating barrel 1, the top of the center position of the backing plate 7 is fixedly connected with the cushion block 25, the cushion block 25 can support the heating barrel 1, the top of the cushion block 25 is fixedly connected with the heating barrel 1, the wall thickness of the heating barrel 1 is provided with uniformly distributed heating copper pipes 12, both ends of the heating copper pipes 12 penetrate through the heating barrel 1 and are fixedly connected with heating heads 13, the heating copper pipes 12 and the heating heads 13 can heat the inside of the heating barrel 1, so as to heat the optical fiber preform, the bottom of the inner wall of the heating barrel 1 is penetrated and fixedly connected with the air inlet pipe 35, the air inlet pipe 35 can be used to transport inert gas, the top of the air inlet pipe 35 is penetrated and fixedly connected with the conveying pipe 23, the outer circle of the top of the conveying pipe 23 is provided with uniformly distributed branch pipes 24, the inert gas can enter the heating barrel 1 through the conveying pipe 23 and the branch pipes 24, so as to prevent air from reacting with the optical fiber preform, the outer circle of the rear side of the heating barrel 1 is fixedly connected with the rotating part 20, the rotating part 20 can make the circular cover 16 rotate with the heating barrel 1, and the top of the rotating part 20 is provided with a limiting assembly.

[0036] In combination Figure 3 - Figure 5The limiting assembly comprises a circular cover 16 fixedly connected between the rotating part 20, a second sliding rail 30 fixedly connected to the front side of the circular cover 16, the second sliding rail 30 can prevent the U-shaped block 26 from deviating, the U-shaped block 26 is slidably connected to the inner wall of the second sliding rail 30, two rotating rods 27 are rotatably connected to the inner wall of the U-shaped block 26, the U-shaped block 26 can drive the rotating rod 27 to rotate, the rotating rod 27 can push the L-shaped supporting plate 28 to move, the two rotating rods 27 are rotatably connected to the L-shaped supporting plate 28 on one side, the two L-shaped supporting plates 28 are fixedly connected to the supporting rods 32 on the opposite sides, the L-shaped supporting plate 28 can drive the supporting rod 32 to move, the supporting rod 32 can drive the stop block 31 to move, and the stop block 31 is fixedly connected to the two ends of the two supporting rods 32, the two supporting rods 32 are sleeved with springs 33 on the outer circles, the push block 19 is fixedly connected to the front side of the outer circle of the heating barrel 1, the stop block 31 is clamped between the push block 19, the circular cover 16 can be fixed, the circular cover 16 is convenient to close, the circular plate 17 is fixedly connected to the bottom center position of the circular cover 16, the circular plate 17 enters the heating barrel 1, the branch pipe 24 enters the circular hole 18, the sealing property between the circular cover 16 and the heating barrel 1 can be improved, and the circular blocks 34 are fixedly connected to the bottom of the circular cover 16.

[0037] Working principle: when the heating furnace is used, the optical fiber preform is placed in the heating barrel 1, the first pinion 6 is closed, the circular cover 16 drives the circular plate 17 to enter the heating barrel 1, the circular blocks 34 enter the circular holes 18, the sealing property of the heating furnace is improved, meanwhile, the push block 19 enters the limiting box 21, the push block 19 extrudes the stop block 31, the stop block 31 extrudes the supporting rod 32, the spring 33 is compressed, the push block 19 enters the stop block 31, the stop block 31 is clamped between the push block 19, the circular cover 16 is fixed, the inert gas is transported into the conveying pipe 23 through the inlet pipe 35, the inert gas is injected into the heating barrel 1 through the branch pipe 24, the reaction between the optical fiber preform and the air is prevented, the heating copper pipe 12 and the heating head 13 heat the heating barrel 1 together, the motor 4 is started to drive the second pinion 9 to rotate, thereby driving the gear wheel 8 to rotate, the gear wheel 8 drives the moving rod 3 to rotate around the outer circle of the heating barrel 1, the temperature sensor 22 detects the temperature of the outer wall of the heating barrel 1, when the temperature of the temperature sensor 22 is inconsistent, the signal receiver 11 can receive the signal of the temperature sensor 22, the control panel 10 controls the corresponding heating copper pipe 12 and heating head 13 to heat the heating barrel 1, so that the temperature of the heating barrel 1 is uniform, and the heating effect is improved, when the circular cover 16 needs to be opened, the U-shaped block 26 is pushed to drive the rotating rod 27 to rotate, the rotating rod 27 pushes the L-shaped supporting plate 28 to move, meanwhile, the first sliding rail 29 limits the L-shaped supporting plate 28, the L-shaped supporting plate 28 drives the supporting rod 32 to move, drives the stop block 31 to move, compresses the spring 33, and releases the limiting of the push block 19, opens the circular cover 16, and improves the use effect.

[0038] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A furnace for the production of optical fiber preforms, comprising a base plate (7), characterized in that: The left side of the top of the backing plate (7) is fixedly connected with an L-shaped plate (5), the top of the L-shaped plate (5) is fixedly connected with a motor (4), the output end of the motor (4) penetrates through the L-shaped plate (5) and is fixedly connected with a first pinion (6), the outer circle of the first pinion (6) is meshingly connected with a large gear (8), the outer circle of the large gear (8) is meshingly connected with two second pinions (9), the top of the large gear (8) is fixedly connected with a moving rod (3), the moving rod (3) is provided with uniformly distributed temperature sensors (22) on one side, the top of the backing plate (7) is fixedly connected with a cushion block (25), the top of the cushion block (25) is fixedly connected with a heating barrel (1), the wall thickness of the heating barrel (1) is provided with uniformly distributed heating copper pipes (12), the two ends of the heating copper pipes (12) penetrate through the heating barrel (1) and are fixedly connected with heating heads (13), the bottom of the outer wall of the heating barrel (1) is fixedly connected with an air inlet pipe (35), and the air inlet pipe (35) penetrates through and extends to one side of the heating barrel (1), the other end of the air inlet pipe (35) penetrates through and is fixedly connected with a conveying pipe (23), the outer circle of the conveying pipe (23) is provided with uniformly distributed branch pipes (24) on the top, the outer circle of the rear side of the heating barrel (1) is fixedly connected with a rotating piece (20), and the top of the rotating piece (20) is provided with a limiting assembly.

2. A furnace for producing an optical fiber preform according to claim 1, characterized in that: The limiting assembly comprises a circular cover (16) fixedly connected between the rotating piece (20), a second sliding rail (30) fixedly connected to the front side of the circular cover (16), a U-shaped block (26) slidingly connected to the inner wall of the second sliding rail (30), two rotating rods (27) rotatably connected to the inner wall of the U-shaped block (26), two L-shaped support plates (28) rotatably connected to one side of the two rotating rods (27), two support rods (32) fixedly connected to the opposite sides of the two L-shaped support plates (28), two stop blocks (31) fixedly connected to one end of the two support rods (32), springs (33) sleeved on the outer circles of the two support rods (32), a push block (19) fixedly connected to the front side of the outer circle of the heating barrel (1), a circular plate (17) fixedly connected to the bottom center position of the circular cover (16), and circular blocks (34) fixedly connected to the bottom of the circular cover (16).

3. A furnace for producing an optical fiber preform according to claim 1, characterized in that: The top right side of the backing plate (7) is provided with a control panel (10), and the front side of the control panel (10) is provided with a signal receiver (11).

4. The optical fiber preform production furnace according to claim 1, characterized by: The bottom of the second pinion (9) is rotatably connected with the backing plate (7).

5. A furnace for producing an optical fiber preform according to claim 2, characterized in that: The bottom of the rotating piece (20) is fixedly connected with a circular sliding rail (2), and the inner wall of the circular sliding rail (2) is slidingly connected with the moving rod (3).

6. A furnace for producing an optical fiber preform according to claim 2, characterized in that: The push block (19) is engaged with the stop block (31).

7. A furnace for producing an optical fiber preform according to claim 2, characterized in that: The front bottom of the circular cover (16) is fixedly connected with a limiting box (21), the top of the limiting box (21) is fixedly connected with two first sliding rails (29), and the inner walls of the two first sliding rails (29) are slidingly connected with L-shaped support plates (28).

8. A furnace for producing an optical fiber preform according to claim 2, characterized in that: The circular cover (16) top is penetrated and fixedly connected with an electromagnetic valve (15), and the electromagnetic valve (15) top is penetrated and fixedly connected with an air outlet pipe (14).

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