Ignition device and optical fiber preform deposition equipment having the same

Abstract

The present invention provides an ignition device, which is applied to a deposition device for an optical fiber preform rod, wherein the deposition device comprises a deposition cavity and a blowtorch arranged inside the deposition cavity, wherein the deposition cavity is provided with an ignition port of the blowtorch, and the ignition device comprises: an ignition mechanism, which is arranged outside the deposition cavity and faces the ignition port, wherein the ignition mechanism comprises a first driver and an igniter; and a capping mechanism, which is arranged outside the deposition cavity, wherein the capping mechanism comprises a second driver and a baffle. The device can avoid direct manual contact with the blowtorch, and can also avoid bumping against the seed rod and the blowtorch head, thereby realizing the automation of the blowtorch ignition action inside the deposition cavity, thereby improving the safety factor of manual operation, and improving the product yield and production efficiency.

Description

Technical Field

[0001] The invention relates to the field of optical fiber preform equipment, and in particular to an ignition device for VAD deposition equipment and a deposition equipment having the ignition device. Background Art

[0002] There are more than ten methods for producing optical fiber preforms in the world. The main methods for producing high-quality optical fibers are the following four processes: PCVD, MCVD, VAD and OVD. Among them, VAD and OVD are the more mainstream processes for preparing optical fiber preform loose bodies. The equipment for preparing optical fiber preform loose bodies by VAD and OVD mainly consists of a deposition chamber, a raw material control cabinet, a blowtorch and an exhaust device. The deposition chamber plays a very important role in the deposition process of the preform loose body, which ensures that the preform loose body is not disturbed by the external environment during the deposition process and the need for safety protection.

[0003] At present, at the beginning of the core rod VAD deposition process, it is necessary to manually ignite the torch using an igniter, and then close the deposition chamber door. Because the core rod deposition process uses a hydrogen-oxygen flame, there is a certain risk in the torch ignition process; at the same time, there is a risk that the seed rod and the torch head may be hit by the igniter during manual use, causing damage, thus affecting product quality.

[0004] In order to solve the above problems, it is necessary to propose a new ignition device. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and to provide an ignition device which can easily realize the automation of the ignition action, thereby improving the production efficiency and the safety of personnel operation.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An ignition device is applied to a deposition device for an optical fiber preform, the deposition device comprising a deposition cavity and a blowtorch arranged inside the deposition cavity, the deposition cavity being provided with an ignition port of the blowtorch, characterized in that the ignition device comprises:

[0008] An ignition mechanism, which is disposed outside the deposition chamber, and includes a first driver and an igniter, and the igniter faces the ignition port;

[0009] and a capping mechanism, which is arranged outside the deposition chamber and beside the ignition port, the capping mechanism comprising a second driver and a baffle;

[0010] When the blowtorch is ignited, the first driver drives the igniter to ignite the blowtorch through the ignition port. When the ignition of the blowtorch is completed, the first driver drives the igniter to leave the ignition port, and the second driver drives the baffle to close the ignition port.

[0011] Furthermore, the ignition device further comprises a PLC controller which is communicatively connected to the first driver and / or the second driver.

[0012] Further, the first driver includes a cylinder and a connecting rod, one end of the connecting rod is connected to the cylinder, and the other end of the connecting rod is connected to the igniter; and / or the second driver includes a cylinder and a connecting rod, one end of the connecting rod is connected to the cylinder, and the other end of the connecting rod is connected to the baffle.

[0013] Furthermore, the second driver also includes a clamp, which is fixed to the other end of the connecting rod and clamps the baffle.

[0014] Furthermore, the ignition device also includes an external clamping ring, which is arranged on the outside of the ignition port and is used to clamp the baffle.

[0015] Furthermore, the ignition device further comprises an internal retaining ring, wherein the internal retaining ring is arranged inside the ignition port, and a plurality of air holes are arranged on an inner wall of the internal retaining ring.

[0016] Furthermore, the surface of the external retaining ring is provided with an acid-resistant coating or a high-temperature-resistant coating; and / or the surface of the internal retaining ring is provided with an acid-resistant coating or a high-temperature-resistant coating.

[0017] Furthermore, the inner diameter of the inner clamping ring is smaller than or equal to the inner diameter of the outer clamping ring.

[0018] Furthermore, the baffle and the ignition port are both circular, and the diameter of the baffle is greater than or equal to the diameter of the ignition port.

[0019] Furthermore, the baffle is a quartz glass baffle or a ceramic baffle.

[0020] The present invention provides a deposition device for an optical fiber preform, which comprises the above-mentioned ignition device.

[0021] The ignition device of the present invention can avoid direct manual contact with the blowtorch, and can also avoid bumping against the seed rod and the blowtorch head, thereby realizing automation of the ignition action, thereby improving the safety factor of manual operation, and improving the product yield and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the ignition device of the present invention;

[0023] Figure 2 Another structural schematic diagram of the ignition device of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the inner and outer clamp rings in the ignition device of the present invention;

[0025] Among them, 1 is the second driver, 2 is the clamp, 3 is the baffle, 4 is the first driver, 5 is the igniter, 6 is the external clamp ring, 7 is the internal clamp ring, 8 is the blowtorch, 9 is the deposition chamber, 10 is the ignition port, and 11 is the air hole. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] It should be noted that in the following specific embodiments, when describing the embodiments of the present invention in detail, in order to clearly represent the structure of the present invention for the convenience of explanation, the structures in the accompanying drawings are not drawn according to general proportions, and are partially enlarged, deformed and simplified. Therefore, it should be avoided to understand this as a limitation of the present invention.

[0028] Embodiment 1:

[0029] The present invention provides an ignition device, which is applied to the deposition equipment of optical fiber preform, the equipment includes a deposition chamber and a blowtorch arranged inside the deposition chamber, the deposition chamber is provided with an ignition port of the blowtorch, the ignition device includes: an ignition mechanism, which is arranged outside the deposition chamber, the ignition mechanism includes a first driver and an igniter, the igniter faces the ignition port; and a capping mechanism, which is arranged outside the deposition chamber and located beside the ignition port, the capping mechanism includes a second driver and a baffle; when the blowtorch is ignited, the first driver drives the igniter to ignite the blowtorch through the ignition port, and when the ignition of the blowtorch is completed, the first driver drives the igniter to leave the ignition port, and the second driver drives the baffle to close the ignition port. Please refer to Figure 1 , Figure 1 FIG. 1 is a schematic diagram of the structure of an ignition device for a deposition chamber according to an embodiment of the present invention. Figure 1 As shown, the manufacturing equipment of the optical fiber preform protected by the present invention includes a VAD deposition chamber (i.e., a deposition chamber 9) and an ignition device. The ignition device includes an ignition mechanism and a capping mechanism. Further, the ignition mechanism includes a first driver 4 and an igniter 5, which are used to ignite a blowtorch 8 disposed inside the deposition chamber 9; the capping mechanism includes a second driver 1 and a baffle 3 fixed on a fixture 2. The blowtorch 8 described in this specification is composed of components such as a lamp holder, a distribution ring, a lamp head and a material pipe.

[0030] Please continue reading Figure 1 and Figure 2 An ignition port 10 is machined at an appropriate position of the deposition cavity 9 ( Figure 1 The ignition port 10 may also be provided on the front, rear, left, and right side walls of the deposition chamber 9, but in this embodiment, the ignition port 10 is preferably provided on the bottom surface of the deposition chamber 9, so that the igniter 5 can ignite the burner 8 to the deposition chamber 9 through the ignition port. As an optional solution, the ignition port 10 may be rectangular, circular, or other suitable hole shapes. The size of the ignition port 10 may be determined according to the size of the igniter 5.

[0031] In this embodiment Figure 2 In the figure, a circular ignition port 10 is shown by way of example. The outer clamp ring 6 can be fixedly installed around the ignition port 10 . The inner ring of the outer clamp ring 6 is also provided with a circle of grooves, the size of which corresponds to the ignition port 10 , for clamping the baffle 3 .

[0032] The baffle 3 is movably mounted on the outer side of the bottom of the deposition chamber 9, and is connected to the second driver 1 through the fixture 2, and is used to be driven to move to the corresponding position of the ignition port 10, and can close the ignition port 10, thereby isolating the heat overflow of the deposition chamber 9; in another case, the baffle 3 is moved away from the corresponding position of the ignition port 10, so that the igniter 5 enters or exits the deposition chamber 9. In this embodiment, the baffle 3 is also processed into a circular ring shape, and corresponds to the size of the external clamp ring 6, and the material used can be selected from quartz glass, ceramics, etc.

[0033] As an optional embodiment, the first driver 4 and the second driver 1 can adopt a cylinder combined with a connecting rod driving mode. Preferably, the connecting rod of the second driver 1 is fixedly connected to one end of the clamp 2, and the other end of the clamp 2 is fixedly connected to the baffle 3, so that the baffle 3 can move linearly following the connecting rod; one end of the connecting rod of the first driver 4 is fixedly connected to the igniter 5, and the igniter 5 can be controlled to move up and down to ignite the blowtorch 8.

[0034] At the same time, in order to ensure the smooth movement of the baffle 3, a pair of guide rails (not shown in the figure) can be installed on both sides of the ignition port 10, and a slider is provided on the guide rail, and the slider connects the two sides of the baffle 3. In this way, when the baffle 3 is driven by the cylinder 1, it can move toward the ignition port 10 or move away from the ignition port 10 along the guide rail.

[0035] Embodiment 2:

[0036] As a preferred embodiment, Figure 3As shown, an internal retaining ring 7 can be arranged around the ignition port 10, and its size matches that of the external retaining ring 6, and its surface is also coated with an acid-resistant and high-temperature-resistant coating; moreover, a circle of multiple air holes 11 is opened on the inner side thereof, and nitrogen can be introduced during the deposition process to cool the baffle 3, while preventing deposits from accumulating on the surface of the baffle 3.

[0037] Embodiment 3:

[0038] Continue to refer Figure 1 Furthermore, the first driver 4 and the second driver 1 are connected to the operation panel of the equipment user through a PLC controller (not shown in the figure). In this way, the electric drive form can accurately set the moving distance of the baffle 3 or the igniter 5, and realize automatic and accurate positioning of its movement. When the VAD deposition process is started, after all cleaning and preparation work is completed, the door of the deposition chamber 9 is closed, and the deposition process is started on the user operation panel. According to the set process program, the pipeline of the blowtorch 8 begins to pass fuel.

[0039] Then, after a delay period set by the program, a control signal is issued, and the second driver 1 controls the baffle 3 (quartz glass) to move away from the ignition port 10, and the first driver 4 controls the igniter 5 to move up and enter the deposition chamber 9, and the igniter 5 ignites the blowtorch 8.

[0040] After the blowtorch 8 is ignited, the first driver 4 controls the igniter 5 to withdraw from the deposition chamber 9, and the second driver 1 controls the baffle 3 (quartz glass) to seal the ignition port 10. At the same time, nitrogen is introduced into the internal retaining ring 7, and multiple air holes 11 on the inner side of the internal retaining ring 7 blow out nitrogen to cool and purge the baffle 3, and the automatic ignition action is completed.

[0041] In summary, the ignition device of the present invention can realize the automation of the ignition action, avoid direct manual contact with the blowtorch, thereby improving the safety factor of manual operation, and can also avoid bumping against the seed rod and the blowtorch head, thereby improving the product yield and production efficiency.

[0042] It should be pointed out that the above description is only used to explain the preferred embodiments of the present invention, and is not intended to limit the present invention in any form. Therefore, any modifications or changes made to the present invention under the same inventive spirit should still be included in the scope of protection intended by the present invention.

Claims

1. An ignition device, applied to a deposition device for an optical fiber preform, the deposition device comprising a deposition chamber and a blowtorch arranged inside the deposition chamber, the deposition chamber being provided with an ignition port of the blowtorch, characterized in that: The ignition device comprises: an ignition mechanism, which is disposed outside the deposition chamber, the ignition mechanism comprising a first driver and an igniter, the igniter facing the ignition port; and A capping mechanism, which is arranged outside the deposition chamber and beside the ignition port, and comprises a second driver and a baffle; When the blowtorch is ignited, the first driver drives the igniter to ignite the blowtorch through the ignition port. When the blowtorch is ignited, the first driver drives the igniter to leave the ignition port, and the second driver drives the baffle to close the ignition port.

2. The ignition device according to claim 1, characterized in that: It also includes a PLC controller which is communicatively connected to the first driver and / or the second driver.

3. The ignition device according to claim 1 or 2, characterized in that: The first driver includes a cylinder and a connecting rod, one end of the connecting rod is connected to the cylinder, and the other end of the connecting rod is connected to the igniter; and / or the second driver includes a cylinder and a connecting rod, one end of the connecting rod is connected to the cylinder, and the other end of the connecting rod is connected to the baffle.

4. The ignition device according to claim 3, characterized in that: The second driver further comprises a clamp, which is fixed to the other end of the connecting rod and clamps the baffle.

5. The ignition device according to claim 1, characterized in that: The ignition device further comprises an external clamping ring, which is arranged at the outside of the ignition port and is used for clamping the baffle.

6. The ignition device according to claim 5, characterized in that: The ignition device further comprises an internal clamping ring, which is arranged inside the ignition port, and a plurality of air holes are arranged on the inner wall of the internal clamping ring.

7. The ignition device according to claim 6, characterized in that: The surface of the external retaining ring is provided with an acid-resistant coating or a high-temperature-resistant coating; and / or the surface of the internal retaining ring is provided with an acid-resistant coating or a high-temperature-resistant coating.

8. The ignition device according to claim 6, characterized in that: The inner diameter of the inner snap ring is smaller than or equal to the inner diameter of the outer snap ring.

9. The ignition device according to claim 1, characterized in that: The baffle plate and the ignition port are both circular, and the diameter of the baffle plate is greater than or equal to the diameter of the ignition port.

10. The ignition device according to claim 1, characterized in that: The baffle is a quartz glass baffle or a ceramic baffle.

Images