阅读说明：本技术 一种热换旋转管的方法 (Method for hot-exchanging rotating pipe ) 是由 王西红 滕建中 王立生 陈彦章 戴季初 王力 郑小学 吕常欢 于 2021-09-18 设计创作，主要内容包括：本发明公开了一种热换旋转管的方法,包括以下步骤：步骤1、将第一旋转管外部整体包裹上保温层,其中,所述第一旋转管为待装入马弗炉中使用的新的旋转管；步骤2、将所述第一旋转管放入预热炉中进行烘烤,烘烤到符合更换所述第一旋转管的工艺要求；步骤3、将所述第一旋转管以预设速度送入所述马弗炉中,同时逐步拆除所述保温层；步骤4、当所述第一旋转管全部进入所述马弗炉之后,关闭炉门。该热换旋转管的方法保持旋转管表面温度的均匀性,防止在热换时旋转管的炸裂,保持温度的均匀,减少析晶,气线的产生。(The invention discloses a method for hot-exchanging a rotating pipe, which comprises the following steps: step 1, integrally wrapping an insulating layer on the outer part of a first rotating pipe, wherein the first rotating pipe is a new rotating pipe to be installed in a muffle furnace for use; step 2, placing the first rotating pipe into a preheating furnace for baking until the first rotating pipe meets the process requirement of replacing the first rotating pipe; step 3, feeding the first rotating pipe into the muffle furnace at a preset speed, and removing the heat-insulating layer gradually; and 4, closing the furnace door after the first rotary pipe completely enters the muffle furnace. The method for hot exchanging the rotating pipe keeps the uniformity of the surface temperature of the rotating pipe, prevents the rotating pipe from being cracked during hot exchanging, keeps the temperature uniform, and reduces the generation of crystallization and gas lines.)

1. A method of hot swapping a rotating tube, comprising the steps of:

step 1, integrally wrapping an insulating layer on the outer part of a first rotating pipe, wherein the first rotating pipe is a new rotating pipe to be installed in a muffle furnace for use;

step 2, placing the first rotating pipe into a preheating furnace for baking until the first rotating pipe meets the process requirement of replacing the first rotating pipe;

step 3, feeding the first rotating pipe into the muffle furnace at a preset speed, and removing the heat-insulating layer gradually;

and 4, closing the furnace door after the first rotary pipe completely enters the muffle furnace.

2. The method of hot swapping a rotating tube of claim 1, wherein in step 2, the baking process comprises: and baking the first rotating pipe according to the temperature rising curve.

3. The method of claim 2, wherein said baking said first rotating tube according to a warming profile comprises: and (3) heating for 48 hours, heating to the target temperature at 20 ℃ per hour in 0-30 hours and at 30 ℃ per hour in 30-45 hours, and preserving the heat for a plurality of hours.

4. The method of hot swapping a rotating tube of claim 3, further comprising, prior to step 3:

and removing the second rotating pipe in the muffle furnace, and heating the muffle furnace to the target temperature in a closed manner, wherein the second rotating pipe is an old rotating pipe in the muffle furnace.

5. The method of hot swapping a spin tube of claim 4, wherein the target temperature is 1050 ℃.

6. The method for hot-swapping a rotating pipe according to any one of claims 1 to 5, wherein the step 1, the step of wrapping the first rotating pipe with the insulating layer integrally comprises: and fully wrapping the first rotating pipe with rock wool felt and tightly binding the first rotating pipe with a rock wool rope.

7. The method of hot-swapping a rotating tube of claim 6, wherein the preset speed is 2-4 meters per minute.

Technical Field

The invention relates to the technical field of Danna method tube drawing, in particular to a method for thermally changing a rotating tube.

Background

In the current tube drawing technology, a mainstream tube drawing technology, danna method horizontal tube drawing, is to make molten glass flow out from a tank furnace through a chute, fall on a rotary tube made of refractory materials in a belt shape, keep the temperature of the rotary tube by a muffle furnace heating system, make the molten glass flow from the upper end to the lower end to form a pipe shape by a blowing system matched with the inside of the rotary tube under the condition of continuous rotation, and lead the molten glass into a tube drawing tractor through a runway with guide wheels to be drawn into a glass tube. The rotary pipe is a consumable product, and usually needs to be replaced every 30 days, the rotary pipe is heated to the use temperature in advance for heat preservation, and then the rotary pipe is installed into a production device from a preheating device within a short time (within 15 minutes), and the process is usually called heat replacement. At present, the mode of the domestic heat exchange of the rotary pipe is to directly heat the rotary pipe, the heat exchange is directly carried out after the temperature process requirement is met, meanwhile, an external heat source is used for compensating heat in the heat exchange process to enable the temperature of the rotary pipe to be reduced too fast, the heat preservation on the surface of the rotary pipe is uncontrollable, so that the severe change of the surface temperature of the rotary pipe in the heat exchange process cannot be reduced, and the rotary pipe is easy to explode and crack due to uneven temperature or too fast temperature reduction. Meanwhile, the surface temperature of the replaced rotating pipe is uneven, and the defects of crystallization, gas lines and the like are easy to occur in the production process.

Disclosure of Invention

In view of the above problems in the prior art, it is desirable to provide a method of hot-swapping a rotating pipe.

The specific technical scheme is as follows:

a method for hot-exchanging a rotating pipe mainly comprises the following steps:

step 1, integrally wrapping an insulating layer on the outer part of a first rotating pipe, wherein the first rotating pipe is a new rotating pipe to be installed in a muffle furnace for use;

step 2, placing the first rotating pipe into a preheating furnace for baking until the first rotating pipe meets the process requirement of replacing the first rotating pipe;

step 3, feeding the first rotating pipe into the muffle furnace at a preset speed, and removing the heat-insulating layer gradually;

and 4, closing the furnace door after the first rotary pipe completely enters the muffle furnace.

In the method for hot-swapping a rotating tube, the method further includes the step 2, wherein the baking process includes: and baking the first rotating pipe according to the temperature rising curve.

In the above method for hot-swapping a rotating tube, the baking process of the first rotating tube according to the temperature rise curve is further characterized by: and (3) heating for 48 hours, heating to the target temperature at 20 ℃ per hour in 0-30 hours and at 30 ℃ per hour in 30-45 hours, and preserving the heat for a plurality of hours.

In the above method for hot-swapping a rotating pipe, the method further includes, before the step 3:

and removing the second rotating pipe in the muffle furnace, and heating the muffle furnace to the target temperature in a closed manner, wherein the second rotating pipe is an old rotating pipe in the muffle furnace.

The method for heat-exchanging a rotating tube described above is further characterized in that the target temperature is 1050 ℃.

In the above method for heat exchanging a rotating pipe, the method is further characterized in that in step 1, the step of integrally wrapping the first rotating pipe with the insulating layer comprises the following steps: and fully wrapping the first rotating pipe with rock wool felt and tightly binding the first rotating pipe with a rock wool rope.

In a method of hot-swapping a rotating tube as described above, the predetermined speed is between 2 and 4 meters per minute.

The positive effects of the technical scheme are as follows:

according to the method for hot exchanging the rotating pipe, the heat-insulating layer is wrapped outside the rotating pipe, the rotating pipe is baked until the process requirement is met, and then the rotating pipe is exchanged.

Drawings

FIG. 1 is a schematic flow chart of a method for hot-swapping a rotating tube according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below by way of embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The numbering of the components themselves, such as "first", "second", etc., is used herein only to distinguish between the objects depicted and not to have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, the present invention discloses a method for hot-exchanging a rotating pipe, comprising: step 1, integrally wrapping the outer part of the first rotating pipe with an insulating layer.

Wherein the first rotary pipe is a new rotary pipe to be charged into a muffle furnace for use.

Wrap up the heat preservation with the outside whole parcel of first rotatory pipe and include and carry out the rock wool felt of full parcel to first rotatory pipe to tighten the rock wool rope.

Optionally, in this embodiment, the rock wool felt product uses high-quality basalt as a raw material, has good incombustibility, has a melting point of 1000 ℃ or higher, and is particularly effective in heat insulation, fire prevention, noise reduction, or noise absorption, and therefore, the heat-insulating layer uses rock wool felt, and of course, other high-temperature resistant materials may also be used.

And 2, placing the first rotating pipe into a preheating furnace for baking until the first rotating pipe meets the process requirement of replacing the first rotating pipe.

Wherein, in the step 2, the baking process comprises: and baking the first rotating pipe according to the temperature rising curve.

Specifically, in a specific embodiment, the baking process of the first rotating tube according to the temperature rise curve includes: and (3) heating for 48 hours, heating to the target temperature at 20 ℃ per hour in 0-30 hours and at 30 ℃ per hour in 30-45 hours, and preserving the heat for a plurality of hours. Wherein the target temperature is 1050 ℃, and the heat preservation time can be 3 hours.

And 3, feeding the first rotating pipe into a muffle furnace at a preset speed, and gradually removing the heat insulation layer.

Wherein the preset speed may be 2-4 meters per minute.

Further, step 3 is preceded by:

and removing the second rotating pipe in the muffle furnace, and heating the muffle furnace to the target temperature in a closed manner, wherein the second rotating pipe is an old rotating pipe in the muffle furnace.

And 4, closing the furnace door after the first rotary pipe completely enters the muffle furnace.

And after the replaced first rotating pipe is baked in a muffle furnace for 4 hours, the first rotating pipe starts to wind materials, the temperature is kept above 1050 ℃, and pipe guiding is started after the materials are wound for three hours.

The method for hot exchanging the rotating pipe maintains the uniformity of the surface temperature of the rotating pipe (the first rotating pipe), prevents the explosion of the rotating pipe (the first rotating pipe) during hot exchanging, maintains the uniformity of the temperature, and reduces the generation of crystallization and gas lines.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.