Optical fiber diameter adjusting mechanism for lower opening of optical fiber drawing furnace

Abstract

The utility model discloses an optical fiber drawing furnace lower opening optical fiber diameter adjusting mechanism which comprises a connecting plate, a supporting plate is connected to one end of the connecting plate, a through hole is formed in the supporting plate, a first adjusting mechanism is arranged at the top end, located at the through hole, of the supporting plate, and a second adjusting mechanism is arranged at the bottom end, located at the through hole, of the supporting plate. According to the utility model, the first adjusting mechanism and the second adjusting mechanism are vertically arranged in the horizontal direction, so that the first adjusting mechanism and the second adjusting mechanism can be positioned in four directions, and the opening size of the caliber can be more effectively controlled; the pressure in the furnace is stabilized, the frequency of too high or high and low furnace pressure is avoided, and the convenience of opening and closing the caliber is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber drawing, in particular to an optical fiber diameter adjustment mechanism at the lower end of an optical fiber drawing furnace. Background Art

[0002] Fiber preform drawing is a physical change process that takes place after the fiber is heated to 2000℃ in an induction furnace to reach the melting point of the fiber. The stability of the drawing furnace is one of the important indicators that affect the quality of fiber drawing products. It is very important to ensure the process stability of the fiber drawing induction furnace. During the drawing process, a good inert gas atmosphere is maintained in the furnace to prevent the entry of oxygen and avoid oxidation reactions of the fiber and graphite parts. Due to the unevenness of the fiber diameter, there is a certain fluctuation range, which leads to fluctuations in the furnace pressure. Controlling the pressure in the drawing furnace and achieving a better balance is an important process purpose of the drawing process control.

[0003] The current process control method uses the changes in the diameter of the optical rod and the optical fiber detection data parameters, and observes the upper and lower furnace ports during process inspection. When the optical fiber parameter indicators change due to the furnace pressure being too small or too large, human process intervention is required to adjust the opening and closing amount of the two aluminum blocks of the lower furnace port extension tube to achieve the purpose of controlling the furnace pressure. The larger the opening of the aluminum block, the more pressure is released in the furnace.

[0004] However, the externally pulled aluminum block is inconvenient to operate, and it is impossible to better judge the opening and closing size to analyze the change in furnace pressure. After the center position of the aluminum block changes, there is a lack of a good reference to measure the offset of the optical fiber alignment at the lower furnace mouth, which affects the standardization of the optical fiber alignment adjustment. Therefore, a fiber diameter adjustment mechanism at the lower mouth of an optical fiber drawing furnace is needed to meet people's needs. Utility Model Content

[0005] The utility model aims to provide a fiber diameter adjustment mechanism at the lower port of an optical fiber drawing furnace to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an optical fiber diameter adjustment mechanism at the lower port of an optical fiber drawing furnace, comprising a connecting plate, one end of the connecting plate is connected to a supporting plate, a through hole is provided on the supporting plate, a first adjustment mechanism is provided on the top end of the supporting plate located at the through hole, a second adjustment mechanism is provided on the bottom end of the supporting plate located at the through hole, and the second adjustment mechanism and the first adjustment mechanism are arranged perpendicular to each other in the horizontal direction;

[0007] The first adjustment mechanism and the second adjustment mechanism both include a first adjustment block and a second adjustment block, the first adjustment block and the second adjustment block are arranged parallel to and symmetrically with each other, a gear is rotatably mounted on the support plate, a first rack and a second rack are respectively meshed on both sides of the gear, the first rack is connected to one side of the first adjustment block, the second rack is connected to one side of the second adjustment block, a connecting block is provided on the support plate, a screw is connected to the inner thread of the connecting block, one end of the screw is connected to a knob, and the other end of the screw is movably connected to the first adjustment block.

[0008] Preferably, a V-shaped groove is formed on the side of the first adjusting block and the second adjusting block which are close to each other.

[0009] Preferably, a positioning shaft is connected to the support plate, the cross section of the positioning shaft is T-shaped, and the gear is rotatably connected to a shaft body with a smaller outer diameter of the positioning shaft.

[0010] Preferably, the second adjusting block is provided with a first plugging hole, the first rack is plugged into the first plugging hole, and the first adjusting block is provided with a second plugging hole, the second rack is plugged into the second plugging hole.

[0011] Preferably, a slide rail is connected to the support plate, the cross section of the slide rail is trapezoidal, and the first adjustment block and the second adjustment block are both slidably connected to the slide rail.

[0012] Preferably, a threaded hole is provided in the connection block, and the screw is threadedly connected in the threaded hole.

[0013] Preferably, a connecting shaft is connected to one end of the screw rod, the cross section of the connecting shaft is T-shaped, and the connecting shaft is rotatably connected in the first adjusting block.

[0014] The beneficial effects of the utility model are:

[0015] In the utility model, the first adjusting mechanism and the second adjusting mechanism are arranged vertically in the horizontal direction, so that the first adjusting mechanism and the second adjusting mechanism can be positioned in four directions, thereby more effectively controlling the opening and closing size of the caliber, stabilizing the pressure in the furnace, avoiding the occurrence of excessively high or high and low furnace pressures, and improving the convenience of opening and closing the caliber.

[0016] In the utility model, the gear, the first rack and the second rack cooperate to enable the first adjustment block to move while driving the second adjustment block to move synchronously toward each other, thereby ensuring that the aperture center is always in the same position, which is convenient for observation and adjustment of optical fiber alignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the top view of the structure of a fiber diameter adjustment mechanism at the lower port of an optical fiber drawing furnace proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the optical fiber diameter adjustment mechanism at the bottom of an optical fiber drawing furnace proposed by the utility model when viewed from above;

[0019] Figure 3 This is a schematic diagram of the structure of a first adjustment mechanism of an optical fiber diameter adjustment mechanism at the bottom of an optical fiber drawing furnace proposed by the utility model;

[0020] Figure 4 This is a schematic diagram of a gear cross-sectional structure of a lower optical fiber diameter adjustment mechanism of an optical fiber drawing furnace proposed by the utility model;

[0021] Figure 5 The utility model is a schematic diagram of the gear side cross-sectional structure of an optical fiber diameter adjustment mechanism at the lower port of an optical fiber drawing furnace.

[0022] In the figure: 1. connecting plate; 2. supporting plate; 3. through hole; 4. first adjusting mechanism; 5. second adjusting mechanism; 6. first adjusting block; 7. second adjusting block; 8. gear; 9. first rack; 10. second rack; 11. connecting block; 12. screw; 13. knob; 14. V-groove; 15. positioning shaft; 16. first jack; 17. second jack; 18. slide rail; 19. threaded hole; 20. connecting shaft. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-5 , a fiber diameter adjustment mechanism at the bottom of an optical fiber drawing furnace, comprising a connecting plate 1, a supporting plate 2 is connected to one end of the connecting plate 1, a through hole 3 is opened on the supporting plate 2, a first adjustment mechanism 4 is arranged on the top end of the supporting plate 2 located at the through hole 3, a second adjustment mechanism 5 is arranged on the bottom end of the supporting plate 2 located at the through hole 3, and the second adjustment mechanism 5 and the first adjustment mechanism 4 are arranged perpendicular to each other in the horizontal direction;

[0025] The first adjustment mechanism 4 and the second adjustment mechanism 5 both include a first adjustment block 6 and a second adjustment block 7, which are arranged parallel to and symmetrically with each other. A gear 8 is rotatably mounted on the support plate 2, and a first rack 9 and a second rack 10 are respectively meshed on both sides of the gear 8. The first rack 9 is connected to one side of the first adjustment block 6, and the second rack 10 is connected to one side of the second adjustment block 7. A connecting block 11 is provided on the support plate 2, and a screw 12 is internally threadedly connected to the connecting block 11, one end of the screw 12 is connected to a knob 13, and the other end of the screw 12 is movably connected to the first adjustment block 6.

[0026] Turning the knob 13 causes the screw 12 to rotate in the connecting block 11, driving the first adjusting block 6 to move horizontally, while causing the first rack 9 to move, and driving the gear 8 to rotate, causing the second rack 10 to move in the opposite direction to the first rack 9, driving the second adjusting block 7 to move synchronously in the opposite direction to the first adjusting block 6, thereby ensuring that the aperture center is always in the same position, facilitating the observation and adjustment of the optical fiber alignment, and through the vertical arrangement of the first adjusting mechanism 4 and the second adjusting mechanism 5 in the horizontal direction, the first adjusting mechanism 4 and the second adjusting mechanism 5 can be positioned in four directions, thereby more effectively controlling the aperture opening and closing size, stabilizing the pressure in the furnace, avoiding excessive or high and low furnace pressures, and improving the convenience of aperture opening and closing.

[0027] Specifically, in the present embodiment, a V-shaped groove 14 is provided on the side where the first adjustment block 6 and the second adjustment block 7 are close to each other, so that the caliber formed by the first adjustment block 6 and the second adjustment block 7 in the first adjustment mechanism 4 and the second adjustment mechanism 5 is more circular, which is conducive to the passage of optical fiber drawing.

[0028] Specifically, in this embodiment, a positioning shaft 15 is connected to the support plate 2, and the cross section of the positioning shaft 15 is T-shaped. The gear 8 is rotatably connected to the shaft body with a smaller outer diameter of the positioning shaft 15, so as to realize smooth rotation of the gear 8 and prevent axial separation of the gear 8.

[0029] Specifically, in this embodiment, a first socket 16 is provided on the second adjustment block 7, and the first rack 9 is inserted into the first socket 16; a second socket 17 is provided on the first adjustment block 6, and the second rack 10 is inserted into the second socket 17, thereby increasing the adjustable range of the minimum spacing between the first adjustment block 6 and the second adjustment block 7.

[0030] Specifically, in this embodiment, a slide rail 18 is connected to the support plate 2, and the cross-section of the slide rail 18 is trapezoidal. The first adjustment block 6 and the second adjustment block 7 are both slidably connected to the slide rail 18 to ensure the stability of the movement of the first adjustment block 6 and the second adjustment block 7, and prevent the first adjustment block 6 and the second adjustment block 7 from separating from the support plate 2.

[0031] Specifically, in this embodiment, a threaded hole 19 is opened in the connection block 11, and the screw 12 is threadedly connected in the threaded hole 19, providing a locking effect for adjusting the distance between the first adjustment block 6 and the second adjustment block 7, thereby ensuring stability after adjustment.

[0032] Specifically, in this embodiment, a connecting shaft 20 is connected to one end of the screw rod 12, and the cross-section of the connecting shaft 20 is T-shaped. The connecting shaft 20 is rotatably connected to the first adjusting block 6, so that the rotation of the screw rod 12 and the movement of the first adjusting block 6 are synchronized and independent, and it is convenient to provide support when the screw rod 12 reverses to drive the first adjusting block 6 to move synchronously.

[0033] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A fiber diameter adjustment mechanism at the bottom of an optical fiber drawing furnace, comprising a connecting plate (1), characterized in that: One end of the connecting plate (1) is connected to a supporting plate (2), a through hole (3) is provided on the supporting plate (2), a first adjusting mechanism (4) is provided on the top end of the supporting plate (2) at the through hole (3), a second adjusting mechanism (5) is provided on the bottom end of the supporting plate (2) at the through hole (3), and the second adjusting mechanism (5) and the first adjusting mechanism (4) are arranged perpendicular to each other in a horizontal direction; The first adjustment mechanism (4) and the second adjustment mechanism (5) both comprise a first adjustment block (6) and a second adjustment block (7), the first adjustment block (6) and the second adjustment block (7) being arranged parallel to each other and symmetrically, a gear (8) being rotatably mounted on the support plate (2), a first rack (9) and a second rack (10) being respectively meshed on both sides of the gear (8), the first rack (9) being connected to one side of the first adjustment block (6), the second rack (10) being connected to one side of the second adjustment block (7), a connecting block (11) being internally threadedly connected to a screw rod (12), one end of the screw rod (12) being connected to a knob (13), and the other end of the screw rod (12) being movably connected to the first adjustment block (6).

2. The optical fiber diameter adjustment mechanism at the bottom of an optical fiber drawing furnace according to claim 1, characterized in that: A V-shaped groove (14) is provided on the side where the first adjustment block (6) and the second adjustment block (7) are close to each other.

3. The optical fiber diameter adjustment mechanism at the bottom of an optical fiber drawing furnace according to claim 1, characterized in that: The support plate (2) is connected to a positioning shaft (15), the cross section of the positioning shaft (15) is T-shaped, and the gear (8) is rotatably connected to a shaft body of the positioning shaft (15) with a smaller outer diameter.

4. The optical fiber diameter adjustment mechanism at the bottom of an optical fiber drawing furnace according to claim 1, characterized in that: The second adjustment block (7) is provided with a first insertion hole (16), and the first rack (9) is inserted into the first insertion hole (16); the first adjustment block (6) is provided with a second insertion hole (17), and the second rack (10) is inserted into the second insertion hole (17).

5. The optical fiber diameter adjustment mechanism at the bottom of an optical fiber drawing furnace according to claim 1, characterized in that: The support plate (2) is connected to a slide rail (18), the cross section of the slide rail (18) is trapezoidal, and the first adjustment block (6) and the second adjustment block (7) are both slidably connected to the slide rail (18).

6. The optical fiber diameter adjustment mechanism at the bottom of an optical fiber drawing furnace according to claim 1, characterized in that: A threaded hole (19) is provided in the connection block (11), and the screw rod (12) is threadedly connected in the threaded hole (19).

7. The optical fiber diameter adjustment mechanism at the bottom of an optical fiber drawing furnace according to claim 1, characterized in that: A connecting shaft (20) is connected to one end of the screw rod (12); the cross section of the connecting shaft (20) is T-shaped, and the connecting shaft (20) is rotatably connected to the first adjustment block (6).

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