A wire drawing furnace and a furnace pressure adjusting device thereof

Abstract

The utility model belongs to optical fiber manufacturing equipment technical field, concretely relates to a wire drawing furnace and furnace pressure regulating device. The utility model discloses through the first lead screw mechanism of sliding table subassembly drive sliding table board longitudinal movement, can nimblely adapt to the installation of different length specifications lower mouth glass tube, need not replace whole furnace pressure regulating device, greatly simplifies the disassembly, cleaning maintenance process of glass tube, promotes operating efficiency, through shutter subassembly cooperation second lead screw mechanism and connecting rod slider transmission structure, can realize the synchronous opening and closing adjustment of both sides shutter board, effectively avoid the error of manual adjustment, improve the accuracy of glass tube bottom end opening adjustment, guarantee the furnace pressure regulating precision, through sliding rail no.

Description

Technical Field

[0001] This utility model belongs to the technical field of optical fiber manufacturing equipment, specifically relating to a drawing furnace and its furnace pressure regulating device. Background Technology

[0002] In the optical fiber drawing process, the stability of the furnace pressure directly affects product quality. Currently, the furnace pressure is typically controlled by adjusting the opening of the lower glass tube. However, existing furnace pressure regulation devices have the following shortcomings: Poor adaptability: The installation position of the existing device is fixed and cannot be adjusted according to the length of the lower glass tube. When changing to a different specification of glass tube, the entire device needs to be disassembled, which is cumbersome. Inconvenient disassembly and cleaning: After long-term use, the glass tube needs to be cleaned regularly to remove residual impurities from the inner wall. However, the existing device and glass tube are both fixed structures, and disassembly and cleaning take a long time, which affects production efficiency. Low adjustment precision: Most existing devices use manual adjustment of shutter opening and closing, which relies on the operator's experience and makes it difficult to accurately control the opening size, resulting in large fluctuations in furnace pressure, which in turn affects the wire drawing quality.

[0003] Therefore, there is an urgent need for a furnace pressure regulating device for wire drawing furnaces that is highly adaptable, easy to operate, and has high adjustment accuracy, in order to solve the above-mentioned technical problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a furnace pressure regulating device for a wire drawing furnace, which has a compact structure, is easy to use and maintain, and can achieve precise adjustment of the glass tube outlet opening through a shutter assembly, taking into account both practicality and stability, and can greatly improve the production efficiency of the equipment.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A furnace pressure regulating device for a wire drawing furnace mainly includes: The slide assembly 4 is located at the bottom of the lower glass tube 2 of the drawing furnace and includes a slide plate 9; The shutter assembly 5 includes a glass tube support ring 13, a second lead screw mechanism, two sliding connection mechanisms, and two shutter plates 14. The glass tube support ring 13 is installed on the first surface of the slide plate 9 and is aligned with the lower glass tube 2 of the drawing furnace. The slide plate 9 has a through hole 25 communicating with the lower glass tube 2 at the position corresponding to the glass tube support ring 13. The second lead screw mechanism is disposed on the second surface of the slide plate 9 away from the glass tube support ring 13. The two shutter plates 14 are respectively connected to the second lead screw mechanism through the two sliding connection mechanisms to change the blocking area of ​​the through hole 25 under the drive of the second lead screw mechanism.

[0006] Preferably, the slide plate 9 includes a first sliding plate 91 and a second sliding plate 92 perpendicularly connected to the first sliding plate 91. The first sliding plate 91 is slidably disposed on the mounting plate 6 and is driven by a first lead screw mechanism to slide in a direction parallel to the extension of the lower glass tube 2. The mounting plate 6 is fixedly installed on the drawing furnace support frame, and the shutter assembly 5 is disposed on the second sliding plate 92.

[0007] Preferably, the feature is that: one of the mounting plate 6 and the first sliding plate 91 is provided with two sliders 7, and the other is provided with a slide rail 24 adapted to the sliders 7, the extension direction of the slide rail 24 being parallel to the extension direction of the lower glass tube 2.

[0008] Preferably, the first lead screw mechanism includes a nut block 10 fixedly connected to the second sliding plate 92, a lead screw 12 threaded through the middle of the nut block 10, and a handwheel 11 connected to the end of the lead screw 12 after passing through a support bearing 8. The support bearing 8 is fixedly installed on the mounting plate 6 and located on the axis of symmetry of the two sliders 7. The axial direction of the lead screw 12 is parallel to the axis of symmetry of the two sliders 7.

[0009] Preferably, the two shutter plates 14 are symmetrically arranged on both sides of the through hole 25. The sliding connection mechanism includes two sliders 21, two slide rails 22 adapted to the two sliders 21, two connecting plates 23, and two connecting rods 20. The two slide rails 22 are installed on the second surface of the slide plate 9, and the extension direction of the two slide rails 22 is perpendicular to the axis of symmetry of the two shutter plates 14. Each shutter plate 14 is fixedly connected to the corresponding slider 21 through the corresponding connecting plate 23. The two sliders 21 are respectively connected to the output end of the second lead screw mechanism through the two connecting rods 20.

[0010] Preferably, the second lead screw mechanism includes a second support bearing 18 fixedly installed on the second surface of the slide plate 9, a second lead screw 17 passing through the second support bearing 18, the central axis of the second lead screw 17 coinciding with the axis of symmetry of the two shutter plates 14, a second nut block 19 threadedly fitted on the second lead screw 17, one end of the two connecting rods 20 coaxially hinged to the second nut block 19, and the other end of the two connecting rods 20 respectively hinged to the two sliders 21.

[0011] Preferably, a rotating shaft is fixedly connected to the end of the second lead screw 17, and the rotating shaft is connected to the output shaft of the drive motor 15 through the transmission component 16. The drive motor 15 is fixedly installed on the first surface of the slide plate 9.

[0012] Preferably, the transmission component 16 is a transmission gear set or a synchronous belt pulley mechanism.

[0013] Preferably, the second support bearing 18 is a deep groove ball bearing, and the drive motor 15 is a servo motor.

[0014] A wire drawing furnace includes: a furnace body and a furnace pressure regulating device as described above, wherein the furnace pressure regulating device is connected to the lower glass tube 2 of the furnace body.

[0015] Compared with the prior art, the present invention has the following main advantages: 1. High adaptability: The slide plate is driven to move longitudinally by the first screw mechanism of the slide plate assembly, which can flexibly adapt to the installation of glass tubes of different lengths and specifications. There is no need to replace the entire furnace pressure adjustment device, which greatly simplifies the disassembly, cleaning and maintenance process of glass tubes and improves operating efficiency.

[0016] 2. Precise adjustment: Through the shutter assembly in conjunction with the second lead screw mechanism and the connecting rod slider transmission structure, the synchronous opening and closing adjustment of the shutter plates on both sides can be realized, effectively avoiding the error of manual adjustment, improving the accuracy of the bottom opening adjustment of the glass tube, and ensuring the accuracy of furnace pressure adjustment.

[0017] 3. Good stability: The sliding rails 1 and 2 provide precise guidance for the moving parts, and the lead screw mechanism provides reliable driving force, which can greatly improve the stability of the device, reduce equipment shaking, and thus improve the quality of optical fiber drawing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall installation of the furnace pressure regulating device in the embodiment of this utility model; Figure 2 This is a schematic diagram of the slide assembly in an embodiment of the present invention; Figure 3 This is a side view of the shutter assembly in an embodiment of the present invention; Figure 4 This is a bottom view of the shutter assembly in an embodiment of this utility model.

[0019] In the diagram: 1-drawing furnace, 2-lower glass tube, 3-furnace pressure regulating device, 4-slide table assembly, 5-shutter assembly, 6-mounting plate, 7-slider one, 8-support bearing one, 9-slide table plate, 91-first sliding plate, 92-first sliding plate, 10-nut block one, 11-handwheel, 12-lead screw one, 13-glass tube support ring, 14-shutter plate, 15-drive motor, 16-transmission component, 17-lead screw two, 18-support bearing two, 19-nut block two, 20-connecting rod, 21-slider two, 22-slide rail two, 23-connecting plate, 24-slide rail one, 25-through hole. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0025] Example 1: This example provides a furnace pressure regulating device for a wire drawing furnace, such as... Figure 1 As shown, the furnace pressure regulating device is located at the bottom of the lower glass tube 2 of the drawing furnace and is used to adjust the opening of the glass tube outlet; the furnace pressure regulating device is specifically composed of a slide assembly 4 and a shutter assembly 5.

[0026] like Figure 2 As shown, the slide assembly 4 mainly includes: mounting plate 6, two sliders 7, support bearing 8, slide plate 9, and first lead screw mechanism.

[0027] The mounting plate 6 is located on one side of the bottom of the lower glass tube 2 and is fixedly installed on the support frame of the drawing furnace. Two sliders 7 are arranged parallel to each other in the vertical direction on the mounting plate 6. The sliding table 9 is slidably mounted on the mounting plate 6 through a sliding rail provided on it and cooperates with the sliders 7. The sliding table 9 is driven by a first lead screw mechanism to slide in a direction parallel to the extension of the lower glass tube 2, thereby adapting to the installation requirements of lower glass tubes of different lengths and facilitating the disassembly, cleaning and maintenance of the glass tube.

[0028] Furthermore, the slide plate 9 is composed of a first sliding plate 91 and a second sliding plate 92 connected vertically, and the first sliding plate 91 is slidably mounted on the mounting plate 6 to drive the second sliding plate to slide up and down relative to the mounting plate 6. The shutter assembly 5 is disposed on the second sliding plate 92.

[0029] Furthermore, the first lead screw mechanism includes a nut block 10 fixedly connected to the second sliding plate 92. A lead screw 12 is threaded through the middle of the nut block 10. The end of the lead screw 12 passes through a support bearing 8 and is connected to a handwheel 11. The support bearing 8 is fixedly installed on the mounting plate 6 and is located on the axis of symmetry of the two sliders 7. In this example, the support bearing 8 is specifically a deep groove ball bearing.

[0030] By rotating the handwheel 11, the lead screw 12 is rotated, and the slide plate 9 is driven to move up and down relative to the mounting plate 6 through the nut block 10.

[0031] like Figures 3-4 As shown, the shutter assembly 5 mainly includes: a glass tube support ring 13, a second lead screw mechanism, two sliding connection mechanisms, and two shutter plates 14.

[0032] The glass tube support ring 13 is installed on the first surface of the slide plate 9 (the upper surface of the second sliding plate in this embodiment) and is aligned with the lower glass tube 2 of the drawing furnace. The slide plate 9 has a through hole 25 communicating with the lower glass tube 2 at the position corresponding to the glass tube support ring 13. The two shutter plates 14 are symmetrically arranged on both sides of the through hole 25. The second lead screw mechanism is arranged on the second surface of the slide plate 9 away from the glass tube support ring 13 (the lower surface of the second sliding plate in this embodiment). The two shutter plates 14 are respectively connected to the second lead screw mechanism through the two sliding connection mechanisms to change the blocking area of ​​the through hole under the drive of the second lead screw mechanism.

[0033] Furthermore, the sliding connection mechanism specifically includes: two sliders 21, two slide rails 22 adapted to the two sliders 21, two connecting plates 23, and two connecting rods 20; the two slide rails 22 are installed on the second surface of the slide plate 9, and the extension direction of the two slide rails 22 is perpendicular to the axis of symmetry of the two shutter plates 14. Each shutter plate 14 is fixedly connected to the corresponding slider 21 through the corresponding connecting plate 23. The two sliders 21 are respectively connected to the output end of the second lead screw mechanism (specifically, the nut block 19 in the second lead screw mechanism) through the two connecting rods 20, and are driven by the second lead screw mechanism to move along the corresponding slide rail 22 to realize the adjustment of the shutter opening size.

[0034] Furthermore, the second lead screw mechanism includes a second support bearing 18 fixedly installed on the second surface of the slide plate 9, and in this example, the second support bearing 18 is specifically a deep groove ball bearing; a second lead screw 17 is threaded through the second support bearing 18, the central axis of the second lead screw 17 coincides with the axis of symmetry of the two shutter plates 14, a second nut block 19 is threaded on the second lead screw 17, and one end of two connecting rods 20 are coaxially hinged to the second nut block 19, and the other end of the two connecting rods 20 is respectively hinged to two sliders 21.

[0035] Furthermore, a rotating shaft is fixedly connected to the end of the second lead screw 17. The rotating shaft is connected to the output shaft of the drive motor 15 through a transmission component 16 (in this embodiment, a transmission gear set or a synchronous belt pulley mechanism). The drive motor 15 is specifically a servo motor and is fixedly installed on the first surface of the slide plate 9 (in this embodiment, the upper surface of the second slide plate).

[0036] The rotation of the drive motor 15 causes the transmission component 16 to drive the lead screw 17 to rotate, which in turn causes the nut block 19 to move laterally along the lead screw 17. The connecting rod 20 pushes the two sliders 21 to slide towards or away from each other along the corresponding slide rails 22, thereby adjusting the opening and closing size of the two shutters and thus achieving precise adjustment of the glass tube outlet opening.

[0037] Example 2: The furnace pressure regulating device for a wire drawing furnace provided in this example includes the following usage process: 1) Before installing the glass tube, the handwheel 11 can be turned to drive the lead screw 12 to rotate according to the actual length of the lower glass tube 2, and the slide plate 9 can be moved up and down relative to the mounting plate 6 through the nut block 10. The glass tube support ring 13 is adjusted to match the height of the bottom of the glass tube, and then the lower glass tube 2 is inserted into the glass tube support ring 13 and fixed.

[0038] 2) During the wire drawing process, the rotation direction of the drive motor 15 can be adjusted according to the furnace pressure adjustment requirements of the wire drawing furnace. Specifically.

[0039] If the furnace pressure is too high, the drive motor 15 rotates forward, which drives the lead screw 17 to rotate forward through the transmission component 16, causing the nut block 19 to move away from the motor. This, in turn, pushes the two sliders 21 to slide in opposite directions along the slide rail 22 through the connecting rod 20, causing the two shutter plates 14 to move in opposite directions. This reduces the area of ​​the two shutter plates 14 blocking the through hole 25, increases the opening of the glass tube outlet, and lowers the furnace pressure.

[0040] If the furnace pressure is too low, the drive motor 15 reverses, which drives the lead screw 17 to reverse through the transmission component 16, causing the nut block 19 to move away from the motor. The connecting rod 20 pulls the two sliders 21 to slide towards each other along the slide rail 22, causing the two shutter plates 14 to move closer to each other. This increases the area of ​​the two shutter plates 14 blocking the through hole 25, reduces the opening of the glass tube outlet, and increases the furnace pressure.

[0041] 3) When maintaining the glass tube: turn the handwheel 11 in the opposite direction to move the slide plate 9 downward to the appropriate position, and then directly disassemble the glass tube without disassembling the entire furnace pressure regulating device.

[0042] Furthermore, all parts of this application that are not described in detail are the same as or implemented using existing technology.

[0043] In summary: 1. High adaptability: The slide plate is driven to move longitudinally by the first screw mechanism of the slide plate assembly, which can flexibly adapt to the installation of glass tubes of different lengths and specifications. There is no need to replace the entire furnace pressure adjustment device, which greatly simplifies the disassembly, cleaning and maintenance process of glass tubes and improves operating efficiency.

[0044] 2. Precise adjustment: Through the shutter assembly in conjunction with the second lead screw mechanism and the connecting rod slider transmission structure, the synchronous opening and closing adjustment of the shutter plates on both sides can be realized, effectively avoiding the error of manual adjustment, improving the accuracy of the bottom opening adjustment of the glass tube, and ensuring the accuracy of furnace pressure adjustment.

[0045] 3. Good stability: The sliding rails 1 and 2 provide precise guidance for the moving parts, and the lead screw mechanism provides reliable driving force, which can greatly improve the stability of the device, reduce equipment shaking, and thus improve the quality of optical fiber drawing.

[0046] The above embodiments are only used to illustrate the design concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The protection scope of this utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in this utility model are within the protection scope of this utility model.

Claims

1. A furnace pressure regulating device for a wire drawing furnace, characterized in that, include: The slide assembly (4) is located at the bottom of the lower glass tube (2) of the drawing furnace and includes a slide plate (9). The shutter assembly (5) includes a glass tube support ring (13), a second lead screw mechanism, two sliding connection mechanisms, and two shutter plates (14). The glass tube support ring (13) is installed on the first surface of the slide plate (9) and is aligned with the lower glass tube (2) of the drawing furnace. The slide plate (9) has a through hole (25) communicating with the lower glass tube (2) at the position corresponding to the glass tube support ring (13). The second lead screw mechanism is located on the second surface of the slide plate (9) away from the glass tube support ring (13). The two shutter plates (14) are connected to the second lead screw mechanism through the two sliding connection mechanisms to change the blocking area of ​​the through hole (25) under the drive of the second lead screw mechanism.

2. The furnace pressure regulating device for a wire drawing furnace according to claim 1, characterized in that: The slide plate (9) includes a first slide plate (91) and a second slide plate (92) perpendicularly connected to the first slide plate (91). The first slide plate (91) is slidably disposed on the mounting plate (6) and driven by a first lead screw mechanism to slide in a direction parallel to the extension of the lower glass tube (2). The mounting plate (6) is fixedly installed on the wire drawing furnace support frame, and the shutter assembly (5) is disposed on the second slide plate (92).

3. The furnace pressure regulating device for a wire drawing furnace according to claim 2, characterized in that: Two sliders (7) are provided on one of the mounting plate (6) and the first sliding plate (91), and a slide rail (24) adapted to the sliders (7) is provided on the other. The extension direction of the slide rail (24) is parallel to the extension direction of the lower glass tube (2).

4. The furnace pressure regulating device for a wire drawing furnace according to claim 3, characterized in that: The first lead screw mechanism includes a nut block (10) fixedly connected to the second sliding plate (92). A lead screw (12) is threaded through the middle of the nut block (10). The end of the lead screw (12) passes through a support bearing (8) and is connected to a handwheel (11). The support bearing (8) is fixedly installed on the mounting plate (6) and located on the axis of symmetry of the two sliders (7). The axial direction of the lead screw (12) is parallel to the axis of symmetry of the two sliders (7).

5. The furnace pressure regulating device for a wire drawing furnace according to claim 4, characterized in that: The two shutter plates (14) are symmetrically arranged on both sides of the through hole (25). The sliding connection mechanism includes two sliders (21), two slide rails (22) adapted to the two sliders (21), two connecting plates (23) and two connecting rods (20). The two slide rails (22) are installed on the second surface of the slide plate (9), and the extension direction of the two slide rails (22) is perpendicular to the axis of symmetry of the two shutter plates (14). Each shutter plate (14) is fixedly connected to the corresponding slider (21) through the corresponding connecting plate (23). The two sliders (21) are respectively connected to the output end of the second lead screw mechanism through the two connecting rods (20).

6. The furnace pressure regulating device for a wire drawing furnace according to claim 5, characterized in that: The second lead screw mechanism includes a second support bearing (18) fixedly installed on the second surface of the slide plate (9). A second lead screw (17) is threaded through the second support bearing (18). The central axis of the second lead screw (17) coincides with the axis of symmetry of the two shutter plates (14). A second nut block (19) is threaded on the second lead screw (17). One end of the two connecting rods (20) is coaxially hinged to the second nut block (19), and the other end of the two connecting rods (20) is respectively hinged to the two sliders (21).

7. The furnace pressure regulating device for a wire drawing furnace according to claim 6, characterized in that: The end of the second lead screw (17) is fixedly connected to a rotating shaft, which is connected to the output shaft of the drive motor (15) through a transmission component (16). The drive motor (15) is fixedly installed on the first surface of the slide plate (9).

8. The furnace pressure regulating device for a wire drawing furnace according to claim 7, characterized in that: The transmission component (16) is specifically a transmission gear set or a synchronous belt pulley mechanism.

9. The furnace pressure regulating device for a wire drawing furnace according to claim 7, characterized in that: The second support bearing (18) is a deep groove ball bearing, and the drive motor (15) is a servo motor.

10. A wire drawing furnace, characterized in that, The drawing furnace includes: a furnace body and a furnace pressure regulating device as described in any one of claims 1-9, wherein the furnace pressure regulating device is connected to the lower glass tube (2) of the furnace body.

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