阅读说明：本技术 一种大口径石英管退火方法及设备 (Annealing method and equipment for large-diameter quartz tube ) 是由 夏雨 陈尚华 于 2021-08-30 设计创作，主要内容包括：本发明涉及石英管加工技术领域,具体公开了一种大口径石英管退火方法及设备,包括加热炉、支架、驱动件、连接轴、主动齿轮、旋转组件和加热组件,支架与加热炉固定连接,支架用于支撑加热炉,驱动件与加热炉固定连接,并位于加热炉的底部,连接轴的一端与驱动件固定连接,连接轴的另一端插入至加热炉内,并与主动齿轮固定连接,旋转组件的数量为多个,多个旋转组件绕主动齿轮圆周分布；通过上述结构设置,能够使得加热炉内的大口径石英管受热更加均匀,避免影响产品热处理质量。(The invention relates to the technical field of quartz tube processing, and particularly discloses a large-caliber quartz tube annealing method and equipment, which comprise a heating furnace, a support, a driving piece, a connecting shaft, a driving gear, a rotating assembly and a heating assembly, wherein the support is fixedly connected with the heating furnace, the support is used for supporting the heating furnace, the driving piece is fixedly connected with the heating furnace and is positioned at the bottom of the heating furnace, one end of the connecting shaft is fixedly connected with the driving piece, the other end of the connecting shaft is inserted into the heating furnace and is fixedly connected with the driving gear, the number of the rotating assemblies is multiple, and the rotating assemblies are distributed around the circumference of the driving gear; through the structure, the large-caliber quartz tube in the heating furnace can be heated more uniformly, and the influence on the heat treatment quality of the product is avoided.)

1. An annealing device for a large-caliber quartz tube is characterized in that,

the heating furnace comprises a heating furnace, a support, a driving piece, a connecting shaft, a driving gear, a rotating assembly and a heating assembly, wherein the support is fixedly connected with the heating furnace, the support is used for supporting the heating furnace, the driving piece is fixedly connected with the heating furnace and is positioned at the bottom of the heating furnace, one end of the connecting shaft is fixedly connected with the driving piece, the other end of the connecting shaft is inserted into the heating furnace and is fixedly connected with the driving gear, the number of the rotating assemblies is multiple, and the rotating assemblies are distributed around the circumference of the driving gear;

each rotating assembly comprises a shaft body, a driven gear and a turntable, one end of the shaft body is fixedly connected with the bottom of the heating furnace, the other end of the shaft body is rotatably connected with the driven gear, the driven gear is meshed with the driving gear, the turntable is fixedly connected with the driven gear and is located above the driven gear, and the heating assembly is arranged inside the heating furnace.

2. The annealing apparatus for large-caliber quartz tubes according to claim 1,

the heating assembly comprises high-temperature bricks, heating rods and a high-temperature cotton layer, the high-temperature bricks are laid on the inner wall of the heating furnace, the heating rods are arranged in a plurality, the high-temperature cotton layer is arranged on one end face, far away from the heating furnace, of the high-temperature bricks, the heating rods are arranged in a plurality, and the heating rods are evenly distributed inside the high-temperature cotton layer.

3. The annealing apparatus for large-caliber quartz tubes according to claim 2,

the rotating assembly further comprises a round table body used for placing the quartz tube, and the round table body is fixedly connected with the turntable and is positioned above the turntable.

4. The annealing apparatus for large-caliber quartz tubes according to claim 3,

the heating furnace comprises a furnace body and a cover body, wherein the cover body is detachably connected with the furnace body, and the cover body covers the upper part of the furnace body.

5. The annealing apparatus for large-caliber quartz tubes according to claim 4,

the heating furnace further comprises an observation window, a hollow groove is formed in the cover body, the observation window is fixedly connected with the cover body, and the observation window is matched with the hollow groove.

6. The annealing apparatus for large-caliber quartz tubes according to claim 5,

the heating furnace also comprises a temperature sensor, wherein the temperature sensor is fixedly connected with the cover body, is positioned below the cover body and is positioned in the furnace body.

7. The annealing apparatus for large-caliber quartz tubes according to claim 6,

the heating furnace also comprises a numerical control display screen, wherein the numerical control display screen is fixedly connected with the furnace body and is positioned on the outer side wall of the furnace body, and the numerical control display screen is electrically connected with the heating rod, the temperature sensor and the driving piece.

8. The annealing method using the annealing apparatus for a large-caliber quartz tube according to claim 7, comprising the steps of:

opening the cover body, vertically placing a large-caliber quartz tube to be subjected to heat treatment into the furnace body, ensuring that one port of the large-caliber quartz tube is buckled with the round table body, and then covering the cover body;

controlling the numerical control display screen, controlling the driving piece to rotate, simultaneously controlling the heating rod to heat, uniformly heating the temperature in the furnace body to 300 ℃ at a speed of 15-25 ℃/min, and then preserving the heat for 50-60 min;

then raising the temperature to 600 ℃ at a constant speed of 15-25 ℃/min, and preserving the temperature for 50-60 min;

then raising the temperature to 900 ℃ at a constant speed of 15-25 ℃/min, and preserving the temperature for 50-60 min; raising the temperature to 1150 ℃ at a constant speed of 15-25 ℃/min, preserving the heat for 10-20 min, and discharging the furnace body when the temperature in the furnace body is naturally cooled to below 200 ℃ to finish the annealing process.

Technical Field

The invention relates to the technical field of quartz tube processing, in particular to a large-diameter quartz tube annealing method and equipment.

Background

After the high-purity quartz sand is melted at high temperature and formed into the quartz tube, the high-purity quartz sand generates thermal stress in the quartz tube in the natural cooling process due to the large temperature difference, and the optical uniformity and the shock resistance of the quartz tube are reduced due to the thermal stress. Therefore, stress relief is required for the molded quartz tube to improve the physical properties of the quartz tube.

At present, stress is eliminated by carrying out heat treatment on a quartz tube, wherein annealing equipment is required to be used in the heat treatment process of the quartz tube, but the existing annealing equipment cannot enable the quartz tube to be uniformly heated, so that the heat treatment quality is influenced.

Disclosure of Invention

The invention aims to provide a large-diameter quartz tube annealing method and equipment, and aims to solve the technical problem that annealing equipment in the prior art cannot enable a quartz tube to be uniformly heated, so that the heat treatment quality is affected.

In order to achieve the purpose, the annealing equipment for the large-caliber quartz tube comprises a heating furnace, a support, a driving piece, a connecting shaft, a driving gear, a rotating assembly and a heating assembly, wherein the support is fixedly connected with the heating furnace, the support is used for supporting the heating furnace, the driving piece is fixedly connected with the heating furnace and is positioned at the bottom of the heating furnace, one end of the connecting shaft is fixedly connected with the driving piece, the other end of the connecting shaft is inserted into the heating furnace and is fixedly connected with the driving gear, the number of the rotating assemblies is multiple, and the rotating assemblies are distributed around the circumference of the driving gear;

each rotating assembly comprises a shaft body, a driven gear and a turntable, one end of the shaft body is fixedly connected with the bottom of the heating furnace, the other end of the shaft body is rotatably connected with the driven gear, the driven gear is meshed with the driving gear, the turntable is fixedly connected with the driven gear and is located above the driven gear, and the heating assembly is arranged inside the heating furnace.

The large-caliber quartz tube in the heating furnace is heated by the heating assembly after the large-caliber quartz tube is placed on the turntable, the driving piece is controlled to rotate, the driving piece drives the connecting shaft to rotate, so that the driving gear is driven to rotate circumferentially, the driven gear is meshed with the driving gear and then rotates along with the driving gear, so that the turntable is driven to rotate, the large-caliber quartz tube on the turntable is rotated, the large-caliber quartz tube in the heating furnace is heated more uniformly, and the influence on the heat treatment quality of products is avoided.

The heating assembly comprises high-temperature bricks, heating rods and a high-temperature cotton layer, the high-temperature bricks are arranged on the inner wall of the heating furnace in a bricklaying mode, the heating rods are arranged in a plurality of numbers, the high-temperature cotton layer is arranged on one end face, far away from the heating furnace, of the high-temperature bricks, the heating rods are arranged in a plurality of numbers, and the heating rods are evenly distributed inside the high-temperature cotton layer.

The high-temperature brick can effectively isolate the heat in the heating furnace from the outside, so that the heating furnace has a good heat preservation and insulation effect.

The rotating assembly further comprises a circular truncated cone body used for placing the quartz tube, and the circular truncated cone body is fixedly connected with the turntable and located above the turntable.

When the large-caliber quartz tube is vertically placed into the heating furnace, one end opening of the large-caliber quartz tube is buckled with the end face of the circular truncated cone body, so that the large-caliber quartz tube is stably erected on the circular truncated cone body, the large-caliber quartz tube is heated more uniformly, and the large-caliber quartz tube is effectively prevented from falling in the rotary heating process.

The heating furnace comprises a furnace body and a cover body, wherein the cover body is detachably connected with the furnace body, and the cover body covers the upper part of the furnace body.

The furnace body is used for placing the large-caliber quartz tube, and the cover body is used for covering the furnace body, so that the furnace body forms a relatively closed space, and the heat treatment of the large-caliber quartz tube in the furnace body is realized.

The heating furnace further comprises an observation window, a hollow groove is formed in the cover body, the observation window is fixedly connected with the cover body, and the observation window is matched with the hollow groove.

The observation window is installed on the cover body, and is installed at the hollow groove, and the arrangement of the observation window facilitates observation of the conditions in the furnace body by an operator.

The heating furnace also comprises a temperature sensor, wherein the temperature sensor is fixedly connected with the cover body, is positioned below the cover body and is positioned in the furnace body.

The temperature sensor is used for monitoring the heat treatment temperature in the furnace body in real time.

The heating furnace further comprises a numerical control display screen, the numerical control display screen is fixedly connected with the furnace body and is located on the outer side wall of the furnace body, and the numerical control display screen is electrically connected with the heating rod, the temperature sensor and the driving piece.

The numerical control display screen can be used for displaying the temperature monitored by the temperature sensor, and simultaneously the numerical control display screen can be used for controlling the action of the driving piece and the heating rod to start heating.

The invention also provides an annealing method adopting the annealing equipment for the large-caliber quartz tube, which comprises the following steps:

opening the cover body, vertically placing a large-caliber quartz tube to be subjected to heat treatment into the furnace body, ensuring that one port of the large-caliber quartz tube is buckled with the round table body, and then covering the cover body;

controlling the numerical control display screen, controlling the driving piece to rotate, simultaneously controlling the heating rod to heat, uniformly heating the temperature in the furnace body to 300 ℃ at a speed of 15-25 ℃/min, and then preserving the heat for 50-60 min;

then raising the temperature to 600 ℃ at a constant speed of 15-25 ℃/min, and preserving the temperature for 50-60 min;

then raising the temperature to 900 ℃ at a constant speed of 15-25 ℃/min, and preserving the temperature for 50-60 min; raising the temperature to 1150 ℃ at a constant speed of 15-25 ℃/min, preserving the heat for 10-20 min, and discharging the furnace body when the temperature in the furnace body is naturally cooled to below 200 ℃ to finish the annealing process.

According to the annealing method and the annealing equipment for the large-caliber quartz tube, the large-caliber quartz tube is placed on the turntable, then the heating assembly is used for heating the large-caliber quartz tube in the heating furnace, then the driving piece is controlled to rotate, the driving piece drives the connecting shaft to rotate, so that the driving gear is driven to rotate circumferentially, and the driven gear is meshed with the driving gear and then rotates along with the driving gear, so that the turntable is driven to rotate, the large-caliber quartz tube on the turntable is rotated, the large-caliber quartz tube in the heating furnace is heated more uniformly, and the heat treatment quality of a product is prevented from being influenced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an annealing apparatus for a large-caliber quartz tube according to the present invention.

Fig. 2 is a front view of the annealing apparatus for a large-caliber quartz tube of the present invention.

Fig. 3 is a cross-sectional view of the a-a line structure of fig. 2 of the present invention.

Fig. 4 is a cross-sectional view of the B-B line structure of fig. 2 of the present invention.

FIG. 5 is a schematic view of a part of the structure of the annealing apparatus for a large-caliber quartz tube according to the present invention.

Fig. 6 is a partial structural schematic view of the rotating assembly of the present invention.

Fig. 7 is a flowchart of the steps of the annealing method of the large-caliber quartz tube according to the invention.

1-heating furnace, 11-furnace body, 12-cover body, 121-hollow groove, 13-observation window, 14-temperature sensor, 15-numerical control display screen, 2-bracket, 3-driving piece, 4-connecting shaft, 5-driving gear, 6-rotating assembly, 61-shaft body, 62-driven gear, 63-turntable, 64-circular table body, 65-upright post, 66-surrounding strip, 7-heating assembly, 71-high temperature brick, 72-heating rod and 73-high temperature cotton layer.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 6, the invention provides large-caliber quartz tube annealing equipment, which comprises a heating furnace 1, a support 2, a driving piece 3, a connecting shaft 4, a driving gear 5, a rotating assembly 6 and a heating assembly 7, wherein the support 2 is fixedly connected with the heating furnace 1, the support 2 is used for supporting the heating furnace 1, the driving piece 3 is fixedly connected with the heating furnace 1 and is positioned at the bottom of the heating furnace 1, one end of the connecting shaft 4 is fixedly connected with the driving piece 3, the other end of the connecting shaft 4 is inserted into the heating furnace 1 and is fixedly connected with the driving gear 5, the number of the rotating assemblies 6 is multiple, and the rotating assemblies 6 are distributed around the circumference of the driving gear 5;

each rotating assembly 6 comprises a shaft body 61, a driven gear 62 and a rotating disc 63, one end of the shaft body 61 is fixedly connected with the bottom of the heating furnace 1, the other end of the shaft body 61 is rotatably connected with the driven gear 62, the driven gear 62 is meshed with the driving gear 5, the rotating disc 63 is fixedly connected with the driven gear 62 and is positioned above the driven gear 62, and the heating assembly 7 is arranged inside the heating furnace 1.

In this embodiment, driving piece 3 is driving motor, through placing the heavy-calibre quartz capsule on carousel 63, then utilizes heating element 7 is to it the heavy-calibre quartz capsule in heating furnace 1 heats, later control driving piece 3 is rotatory, driving piece 3 drives connecting axle 4 rotates, thereby drives driving gear 5 carries out the circumferential rotation, because driven gear 62 with driving gear 5 meshes, then driven gear 62 is rotatory thereupon, drives with this carousel 63 is rotatory, thereby it is right the heavy-calibre quartz capsule on carousel 63 rotates, makes with this the heavy-calibre quartz capsule in heating furnace 1 is heated more evenly, avoids influencing product heat treatment quality.

Further, the heating assembly 7 comprises a plurality of high-temperature bricks 71, a plurality of heating rods 72 and a high-temperature cotton layer 73, the high-temperature bricks 71 are laid on the inner wall of the heating furnace 1, the high-temperature cotton layer 73 is arranged on one end face, away from the heating furnace 1, of the high-temperature bricks 71, the heating rods 72 are arranged in a plurality, and the heating rods 72 are uniformly distributed inside the high-temperature cotton layer 73.

In this embodiment, the high-temperature bricks 71 are laid on the inner wall of the heating furnace 1, so that heat in the heating furnace 1 can be effectively isolated from the outside, and the heating furnace 1 has a good heat preservation and insulation effect. And cooperate with the cotton layer 73 of high temperature, can further promote the heat preservation thermal-insulated effect of heating furnace 1, many heating rods 72 are used for producing heat, realize to the intensification of heating furnace 1.

Further, the rotating assembly 6 further comprises a circular truncated cone body 64 for placing the quartz tube, and the circular truncated cone body 64 is fixedly connected with the rotating disc 63 and is located above the rotating disc 63.

In this embodiment, when the large-diameter quartz tube is placed into the heating furnace 1 in a vertical state, and a port of the large-diameter quartz tube is fastened to the end surface of the circular truncated cone 64, so that the large-diameter quartz tube is stably erected on the circular truncated cone 64, and the large-diameter quartz tube is effectively prevented from falling down in the rotary heating process while being heated more uniformly.

Further, the heating furnace 1 comprises a furnace body 11 and a cover body 12, wherein the cover body 12 is detachably connected with the furnace body 11, and the cover body 12 covers the furnace body 11.

The heating furnace 1 further comprises an observation window 13, a hollow groove 121 is formed in the cover body 12, the observation window 13 is fixedly connected with the cover body 12, and the observation window 13 is matched with the hollow groove 121.

In this embodiment, the furnace body 11 is used for placing a large-diameter quartz tube, and the cover 12 is used for covering the furnace body 11, so that the furnace body 11 forms a relatively closed space, thereby implementing heat treatment of the large-diameter quartz tube in the furnace body 11; the observation window 13 is installed on the cover body 12, and is installed at the hollow groove 121, the arrangement of the observation window 13 facilitates observation of the condition in the furnace body 11 by an operator.

Further, the heating furnace 1 further comprises a temperature sensor 14, wherein the temperature sensor 14 is fixedly connected with the cover 12, is positioned below the cover 12, and is positioned inside the furnace body 11;

heating furnace 1 still includes numerical control display screen 15, numerical control display screen 15 with furnace body 11 fixed connection, and be located the lateral wall of furnace body 11, just numerical control display screen 15 with heating rod 72 temperature sensor 14 with driving piece 3 electric connection.

In this embodiment, the temperature sensor 14 is configured to monitor the heat treatment temperature in the furnace body 11 in real time, and transmit the detected temperature to the numerical control display screen 15, the numerical control display screen 15 may be configured to display the temperature monitored by the temperature sensor 14, and the numerical control display screen 15 may also be configured to control the action of the driving element 3 and the start of heating by the heating rod 72.

Further, the number of the round table bodies 64 is a plurality of, and a plurality of the round table bodies 64 are fixedly connected in sequence, the radius of the lower bottom of each round table body 64 is reduced from bottom to top in sequence, and between two adjacent round table bodies 64, the radius of the lower bottom of the round table body 64 above is smaller than the radius of the upper bottom of the round table body 64 below.

In this embodiment, through a plurality of the round platform bodies 64 are stacked in sequence from top to bottom, and adjacent two between the round platform bodies 64, be located the top the radius of the lower bottom of the round platform body 64 is less than the radius of the upper bottom of the round platform body 64 that is located the below, with this quartz capsule that can adapt to more different diameters in proper order for when the quartz capsule of different diameters was placed vertically, the quartz capsule was difficult for empting.

Further, the rotating assembly 6 further includes a plurality of columns 65, the columns 65 are fixedly connected to the turntable 63 and located above the turntable 63, the number of the columns 65 is multiple, and the columns 65 are circumferentially distributed on the turntable 63.

In this embodiment, a plurality of the columns 65 are uniformly distributed on the circumference, and can enclose the quartz tube, even if the turntable 63 rotates, so that the quartz tube clamped on the circular truncated cone 64 is toppled, and a plurality of the columns 65 can also play a role in protection, and the quartz tube is prevented from falling off from the turntable 63.

Further, the rotating assembly 6 further includes a plurality of surrounding bars 66, and two ends of each surrounding bar 66 are respectively and fixedly connected to two adjacent vertical columns 65, and are located between two adjacent vertical columns 65.

In this embodiment, the surrounding strip 66 is disposed between two adjacent vertical columns 65, so that the quartz tube can be further protected, and the quartz tube is prevented from falling off the turntable 63.

Referring to fig. 7, the present invention further provides an annealing method using the annealing apparatus for a large-caliber quartz tube, including the following steps:

s1: opening the cover body 12, vertically placing a large-caliber quartz tube to be subjected to heat treatment into the furnace body 11, ensuring that one port of the large-caliber quartz tube is buckled with the round table body 64, and then covering the cover body 12;

s2: controlling the numerical control display screen 15, controlling the driving piece 3 to rotate, simultaneously controlling the heating rod 72 to heat, uniformly heating the temperature in the furnace body to 300 ℃ at a speed of 15-25 ℃/min, and then preserving the heat for 50-60 min;

s3: then raising the temperature to 600 ℃ at a constant speed of 15-25 ℃/min, and preserving the temperature for 50-60 min;

s4: then raising the temperature to 900 ℃ at a constant speed of 15-25 ℃/min, and preserving the temperature for 50-60 min; raising the temperature to 1150 ℃ at a constant speed of 15-25 ℃/min, preserving the heat for 10-20 min, and discharging the furnace body 11 when the temperature in the furnace body is naturally cooled to below 200 ℃ to finish the annealing process.

The cover plate is taken down from the furnace body 11, then a large-diameter quartz tube to be subjected to heat treatment is vertically placed into the furnace body 11, meanwhile, one port of the large-diameter quartz tube is buckled with the round table body 64, then the cover body 12 is covered on the furnace body 11, then an operator controls the numerical control display screen 15, controls the driving piece 3 to rotate, controls the heating rod 72 to heat, uniformly heats the temperature in the furnace body to 300 ℃ at a speed of 15-25 ℃/min, and then keeps the temperature for 50-60 min; then raising the temperature to 600 ℃ at a constant speed of 15-25 ℃/min, and preserving the temperature for 50-60 min; then raising the temperature to 900 ℃ at a constant speed of 15-25 ℃/min, and preserving the temperature for 50-60 min; and raising the temperature to 1150 ℃ at a constant speed of 15-25 ℃/min, preserving the temperature for 10-20 min, opening the cover body 12 after the temperature in the furnace body 11 is naturally cooled to be below 200 ℃, and taking out the quartz tube to finish the annealing process.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.