Combined type annular blowtorch suitable for fusion shrinkage and stretching of quartz sleeve

Abstract

The utility model relates to a combined annular blast burner suitable for melting shrinkage and stretching of a quartz sleeve, which comprises an annular lamp wick and baffles stacked on the upper surface and the lower surface of the lamp wick, the baffles and the lamp wick are coaxially arranged, and the baffles are provided with cooling channels; the lamp wick is provided with an oxygen channel and a hydrogen channel, the hydrogen channel is located on the upper side and the lower side of the oxygen channel in the axial direction of the lamp wick, and an oxygen injection opening communicated with the oxygen channel and a hydrogen injection opening communicated with the hydrogen channel are formed in the inner circle face of the lamp wick. The oxygen jet orifices are distributed along the circumferential direction of the inner circle surface; and the hydrogen jet orifices are distributed along the circumferential direction of the inner circular surface and are axially positioned on the upper side and the lower side of the oxygen jet orifice along the inner circular surface. The blowtorch can solve the problem of low hydrogen and oxygen utilization efficiency of the blowtorch in the related art.

Description

Technical Field

[0001] The present application relates to the technical field of optical fiber manufacturing, and in particular to a combined annular blowtorch suitable for melting, shrinking and stretching a quartz sleeve. Background Art

[0002] The sleeve melting and stretching process of optical fiber preform is to insert a core rod of a certain outer diameter into a hollow quartz sleeve, and melt and shrink it into one piece under the conditions of high temperature of 1800-2200℃ and vacuum of the core rod-sleeve interlayer, and then stretch it to obtain an optical fiber preform with a certain outer diameter.

[0003] High temperature furnaces are divided into resistance furnaces and induction furnaces, both of which have the following disadvantages: 1) Long preparation time, with a typical heating time of 40 minutes and a cooling time of 90 minutes; 2) Complex structure, equipped with power cabinet, argon and cooling water system, furnace body, graphite parts, insulation materials, coils, muffle tubes, etc.; 3) The coils, graphite parts, furnace mouth seals, etc. suitable for optical fiber preforms of various sizes have poor flexibility and must be equipped with coils, graphite parts, furnace mouth seals, etc. of various sizes.

[0004] The oxyhydrogen flame torch has the advantages of simple structure, short preparation time, and is suitable for a variety of tube diameters within a certain range. Although the combustion of the oxyhydrogen flame torch will produce hydroxyl groups, the flame only directly contacts the outer surface of the quartz sleeve, and the effect on attenuation is limited. Therefore, the oxyhydrogen flame torch can be selected as the heating component in the sleeve melting and stretching process of the optical fiber preform.

[0005] The following requirements are met when heating the optical fiber preform with an oxyhydrogen flame torch: 1) The flame and heat are distributed as evenly as possible along the outer cylindrical surface of the heated quartz sleeve to prevent the optical fiber preform from stretching and bending; 2) The oxyhydrogen flame is concentrated, and the distance between the torch mouth and the outer wall of the heated quartz sleeve is as close as possible to improve the utilization rate of hydrogen and oxygen gases; 3) The installation of the torch is as simple as possible to meet the "three-in-one" mechanical adjustment requirements of the torch axis, the optical rod axis, and the upper and lower chuck axes; 4) Hydrogen, oxygen gas and cooling water are strictly prohibited from leaking to ensure the high reliability of the torch as a whole; 5) The applicable range of tube diameters is as wide as possible to meet the production needs of small batches and multiple models of optical fiber products.

[0006] As a countermeasure, some patent documents such as CN202021579320.4 and CN202222789187.0 disclose some design schemes of hydrogen-oxygen flame ring blowtorches: use metal pipes to make ring-shaped or arc-shaped bus or diverter devices, and evenly arrange 6-8 nozzles on the ring or arc to install independent glass blowtorches to form a set of ring lamps.

[0007] The shortcomings of this design are: 1) the number of blowtorch nozzles on the circumferential surface is limited, and there must be a sufficiently large distance from the blowtorch nozzle to the outer circumferential surface of the heated quartz sleeve to ensure that the flame completely covers the outer circumferential surface of the heated quartz sleeve. Increasing the distance increases heat dissipation and reduces the efficiency of hydrogen and oxygen gas utilization; 2) the annular and arc-shaped bus or diverter device fixes the diameter size of the annular blowtorch assembly and is only applicable to optical fiber preform products with a single tube diameter. Summary of the invention

[0008] The embodiment of the present application provides a combined annular blowtorch suitable for melting, shrinking and stretching a quartz sleeve, so as to solve the problem of low hydrogen and oxygen gas utilization efficiency of the blowtorch in the related art.

[0009] The embodiment of the present application provides a combined annular burner suitable for melting, shrinking and stretching a quartz sleeve, which comprises:

[0010] Donut-shaped wick;

[0011] and baffles stacked on the upper and lower surfaces of the wick, the baffles being coaxially arranged with the wick and provided with cooling channels;

[0012] The wick is provided with an oxygen channel and a hydrogen channel. Along the axial direction of the wick, the hydrogen channel is located at the upper and lower sides of the oxygen channel. The inner circumferential surface of the wick is provided with an oxygen injection port connected to the oxygen channel and a hydrogen injection port connected to the hydrogen channel.

[0013] The oxygen injection ports are distributed along the circumference of the inner circular surface; the hydrogen injection ports are distributed along the circumference of the inner circular surface and are located at upper and lower sides of the oxygen injection ports along the axial direction of the inner circular surface.

[0014] In some embodiments, along the circumference of the wick, a plurality of oxygen ports are evenly spaced on the wick, one end of the oxygen port is connected to the oxygen delivery pipeline, and the other end is connected to the oxygen channel;

[0015] Along the circumferential direction of the wick, a plurality of hydrogen ports are arranged on the wick at equal intervals, one end of the hydrogen port is connected to the hydrogen delivery pipeline, and the other end is connected to the hydrogen channels located on the upper and lower sides of the oxygen channel.

[0016] In some embodiments, the combined annular blowtorch further comprises an L-shaped plate, the ends of the oxygen delivery pipeline and the hydrogen delivery pipeline are mounted on the L-shaped plate via pipe joints, and at least one of the oxygen port and the hydrogen port is mounted on the L-shaped plate.

[0017] In some embodiments, the oxygen injection port extends along the radial direction of the wick;

[0018] The hydrogen injection port is inclined inwardly along the hydrogen injection direction.

[0019] In some embodiments, the inclination angle θ of the hydrogen injection port ranges from 0 to 35°, and the inclination angle is the angle between the hydrogen injection port and a plane perpendicular to the axial direction of the wick.

[0020] In some embodiments, the cooling channel on the baffle is welded to the cooling pipe.

[0021] In some embodiments, the baffle includes a disk stacked on the wick and a heat shield stacked on the disk;

[0022] An annular air passage is formed between the disk body and the heat shield plate, so that the protective gas forms a gas curtain blowing toward the quartz sleeve.

[0023] In some embodiments, the disk and the heat shield are both provided with cooling channels.

[0024] In some embodiments, a cold liquid input pipe of the cooling pipe is welded to one end of the cooling channel, and a cold liquid output pipe of the cooling pipe is welded to the other end of the cooling channel.

[0025] In some embodiments, the wicks are multiple and are stacked between the baffles;

[0026] Wherein, the inner diameters of the inner circular surfaces of the wicks are different;

[0027] When the inner diameter of the inner circular surface of the wick is smaller than the inner diameter of the baffle, a quartz ring is arranged on the inner wall of the baffle.

[0028] The beneficial effects of the technical solution provided by this application include:

[0029] The combined annular blowtorch provided in the embodiment of the present application is composed of a stacked combination of a wick and a baffle. The oxygen injection ports on the inner circular surface of the wick are distributed along the circumference of the inner circular surface, and hydrogen injection ports are distributed on both sides of the oxygen injection ports. Compared with the arc structure adopted in the prior art, the present application adopts a circular ring structure so that the quartz sleeve can be heated all around, ensuring that the hydrogen-oxygen flame is uniform and not easy to bend and deform due to heat; compared with the prior art adopting an arc or circular arrangement of multiple blowtorch ports, the present application directly arranges oxygen injection ports and hydrogen injection ports on the inner circular surface to form a hydrogen-oxygen flame in the inner circular surface area to heat the quartz sleeve. This hole-opening method is easier to reduce the flame blind area between the blowtorch ports than setting the blowtorch ports, so that the hydrogen-oxygen flame can be covered along the entire circumference of the inner circular surface, thereby ensuring that the flame completely covers the outer circular surface of the heated quartz sleeve, so there is no need to increase the distance, thereby reducing heat dissipation and improving the utilization efficiency of hydrogen and oxygen gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic diagram of the structure of a combined annular blowtorch suitable for melting, shrinking and stretching a quartz sleeve provided in an embodiment of the present application;

[0032] Figure 2 A schematic diagram of a wick provided in an embodiment of the present application;

[0033] Figure 3 The layout diagram of the wick, oxygen delivery pipeline and hydrogen delivery pipeline provided in the embodiment of the present application;

[0034] Figure 4 A three-dimensional diagram of a combined annular blowtorch suitable for melting, shrinking and stretching a quartz sleeve provided in an embodiment of the present application;

[0035] Figure 5 A schematic diagram of the structure of another combined annular blowtorch suitable for melting, shrinking and stretching of quartz sleeves provided in an embodiment of the present application.

[0036] In the figure: 1, wick; 10, oxygen channel; 100, oxygen injection port; 11, hydrogen channel; 110, hydrogen injection port; 2, baffle; 20, disk; 21, heat shield; 22, annular airway; 23, quartz ring; 24, gland; 3, oxygen port; 4, oxygen delivery pipeline; 5, hydrogen port; 6, hydrogen delivery pipeline; 7, quartz sleeve; 8, cooling pipe; 80, cold liquid input pipe; 81, cold liquid output pipe; 9, L-shaped plate; 90, pipe joint. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the embodiment of the present application provides a combined annular blowtorch suitable for quartz sleeve melting and shrinking and stretching, which includes a circular wick 1, and baffles 2 stacked on the upper and lower surfaces of the wick 1, the baffle 2 is coaxially arranged with the wick 1, and the baffle 2 is provided with a cooling channel; wherein the wick 1 is provided with an oxygen channel 10 and a hydrogen channel 11, and along the axial direction of the wick 1, the hydrogen channel 11 is located at the upper and lower sides of the oxygen channel 10, and the inner circular surface of the wick 1 is provided with an oxygen injection port 100 connected to the oxygen channel 10 and a hydrogen injection port 110 connected to the hydrogen channel 11; the oxygen injection port 100 is distributed along the circumferential direction of the inner circular surface; the hydrogen injection port 110 is distributed along the circumferential direction of the inner circular surface, and is located at the upper and lower sides of the oxygen injection port 100 along the axial direction of the inner circular surface.

[0039] The combined annular blowtorch provided in the embodiment of the present application comprises a wick 1 and a baffle 2 which are stacked and combined. The oxygen injection ports 100 on the inner circular surface of the wick 1 are distributed along the circumference of the inner circular surface, and the hydrogen injection ports 110 are distributed on both the upper and lower sides of the oxygen injection ports 100. Compared with the arc structure adopted in the prior art, the present application adopts an annular structure so that the quartz sleeve can be heated all around, ensuring that the hydrogen-oxygen flame is uniform and not easy to bend and deform due to heat. Compared with the prior art which adopts an arc or circular arrangement of multiple blowtorch ports, the present application directly arranges the oxygen injection ports 100 and the hydrogen injection ports 110 on the inner circular surface to form an hydrogen-oxygen flame in the inner circular surface area to heat the quartz sleeve. This opening method is easier to reduce the flame blind area between the blowtorch ports than setting the blowtorch ports, so that the hydrogen-oxygen flame can be covered along the entire circumference of the inner circular surface, thereby ensuring that the flame completely covers the outer circular surface of the heated quartz sleeve, so there is no need to increase the distance, thereby reducing heat dissipation and improving the utilization efficiency of hydrogen and oxygen gases.

[0040] For example, as an example, the oxygen injection port 100 is provided with one layer, and the hydrogen injection port 110 is provided with one layer above and below, and each layer can have 60 to 180 small holes. Under the same inner diameter size, it is obviously difficult to accommodate 60 to 180 blowtorch ports in the prior art.

[0041] It should be noted that in the present application, the baffle 2 is made of metal material, such as high-temperature resistant stainless steel such as 310S, and can be cooled by injecting cold material into the cooling channel to prevent local deformation of the baffle 2 and the wick 1, wherein the cold material can be a liquid such as water or gas.

[0042] In order to make the oxyhydrogen flame gas evenly distributed on the circumference of the wick 1, the present application has been further optimized, wherein, along the circumferential direction of the wick 1, a plurality of oxygen ports 3 are evenly spaced on the wick 1, one end of the oxygen port 3 is connected to the oxygen delivery pipe 4, and the other end is connected to the oxygen channel 10; along the circumferential direction of the wick 1, a plurality of hydrogen ports 5 are evenly spaced on the wick 1, one end of the hydrogen port 5 is connected to the hydrogen delivery pipe 6, and the other end is connected to the hydrogen channel 11 located on the upper and lower sides of the oxygen channel 10.

[0043] The hydrogen port 5 and the oxygen port 3 actually function as channels. For the oxygen port 3, since the oxygen injection port 100 has only one layer, after the oxygen enters from the oxygen delivery pipe 4, it can be evenly distributed to each oxygen port 3 under the action of the oxygen port 3, and then enters the oxygen channel 10, and then is ejected from the oxygen injection port 100. For example, see Figure 3 As shown, three oxygen ports 3 are provided and are evenly distributed on the circumference of the wick 1 at a central angle of 120°. After oxygen enters from the oxygen delivery pipe 4, it is evenly divided into three branches and enters the three oxygen ports 3 respectively.

[0044] Similarly, for the hydrogen port 5, since the hydrogen injection port 110 has two layers, the hydrogen port 5 actually plays the role of dividing one gas into two gases, that is, after the hydrogen enters from the hydrogen delivery pipeline 6, it is distributed to each hydrogen port 5, and the hydrogen port 5 then divides the hydrogen into two, the upper hydrogen of each hydrogen port 5 is ejected from the upper hydrogen injection port 110, and the lower hydrogen of each hydrogen port 5 is ejected from the lower hydrogen injection port 110. For example, see Figure 3 As shown, three hydrogen ports 5 are provided and are evenly distributed on the circumference of the wick 1 at a central angle of 120°. The hydrogen port 5 and the oxygen port 3 are evenly distributed on the circumference of the wick 1 at a central angle of 60°. After the hydrogen enters from the hydrogen delivery pipe 6, it is first evenly divided into three branches and enters the three hydrogen ports 5 respectively. Then the hydrogen port 5 is evenly distributed into two branches and enters the hydrogen channels 11 on the upper and lower sides respectively.

[0045] The oxygen port 3 and the hydrogen port 5 are made of existing components.

[0046] Furthermore, the combined annular blowtorch also includes an L-shaped plate 9, the ends of the oxygen delivery pipeline 4 and the hydrogen delivery pipeline 6 are installed on the L-shaped plate 9 through pipe joints 90, and at least one of the oxygen port 3 and the hydrogen port 5 is installed on the L-shaped plate 9.

[0047] On the one hand, the blowtorch has good rigidity as a whole through the three-point support and fixation of multiple external pipes and equally divided blocks; on the other hand, it is easy to control the size and tolerance of the blowtorch axis and the reference by using the large plane of the L-shaped plate as the installation reference. Therefore, the blowtorch as a whole has greatly reduced the difficulty of mechanical installation and mechanical adjustment. Six through holes are set on the L-shaped plate for installation and connection with the external production machine bracket.

[0048] Further, the oxygen injection port 100 extends along the radial direction of the wick 1; the hydrogen injection port 110 is inclined inward along the hydrogen injection direction. The inclination angle θ of the hydrogen injection port 110 ranges from 0 to 35°, and the inclination angle is the angle between the hydrogen injection port 110 and a plane perpendicular to the axial direction of the wick 1.

[0049] By tilting the hydrogen injection port 110 to an angle of θ, the width of the hot zone of the hydrogen and oxygen flames is reduced, and the hydrogen and oxygen flames are concentrated to increase the heating temperature. According to experimental data from production feedback, for quartz sleeves of the same size and the same stretching speed, a wick with a 20° angle saves about 16.7% of hydrogen and oxygen compared to a parallel wick without an angle.

[0050] The wick with a fixed jet tilt angle controls the heating power and the gas jet speed by changing the gas flow rate, and at the same time affects the gap between the hydrogen-oxygen flame and the inner surface of the wick, so as to meet the melting / stretching processing requirements of quartz sleeves with a certain range of tube diameters. In the actual production process, several wicks with different jet tilt angles are processed, and one of them is selected according to the actual situation for assembly with the baffle 2 to meet the melting / stretching processing requirements of quartz sleeves with a wide range of tube diameters.

[0051] The cooling channel on the baffle 2 is welded to the cooling pipe 8. All cooling channels are fully welded without sealing rings, which effectively solves the problem of water leakage of the blowtorch and improves reliability.

[0052] Furthermore, the baffle 2 includes a disk body 20 stacked on the wick 1 and a heat shield 21 stacked on the disk body 20 ; an annular air channel 22 is formed between the disk body 20 and the heat shield 21 so that the protective gas forms a gas curtain blowing toward the quartz sleeve 7 .

[0053] The protective gas may be an inert gas such as nitrogen.

[0054] As an example, by setting a small flow rate of 10-50s lm of nitrogen, an annular "nitrogen curtain" is formed in the annular gap between the inner circular surface of the blowtorch and the outer circular surface of the quartz sleeve 7 to lock the hydrogen and oxygen flame and heat, which can further improve the utilization rate of hydrogen and oxygen.

[0055] The disk body 20 and the heat shield 21 are both provided with cooling channels. One end of the cooling channel is welded with a cold liquid input pipe 80 of the cooling pipe 8, and the other end is welded with a cold liquid output pipe 81 of the cooling pipe 8. All cooling channels are fully welded without sealing rings, which effectively solves the problem of water leakage of the blowtorch and improves reliability.

[0056] Furthermore, there are multiple wicks 1, which are stacked between the baffles 2; wherein the inner diameters of the inner circular surfaces of the wicks 1 are different; when the inner diameter of the inner circular surface of the wick 1 is smaller than the inner diameter of the baffle 2, a quartz ring 23 is provided on the inner wall of the baffle 2.

[0057] The wick 1 and the baffle 2 in the present application are stacked so that they can be disassembled and reassembled. Therefore, by providing multiple wicks 1 and selecting appropriate wicks 1 and baffles 2 for assembly for production according to the actual specifications of the quartz sleeve, the present application can be applicable to the production needs of quartz sleeves with various specifications of outer diameters.

[0058] By providing the quartz ring 23, the heating area can be isolated from the disk body through which the cooling water flows, which helps to reduce the heat loss and further improve the utilization rate of hydrogen and oxygen.

[0059] In addition, according to actual needs, a pressure cover 24 can be provided outside the quartz ring 23 and the heat shield 21 .

[0060] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0061] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0062] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A combined annular blowtorch suitable for melting, shrinking and stretching of quartz sleeves, characterized in that: It includes: A donut-shaped wick (1); and baffles (2) stacked on the upper and lower surfaces of the wick (1), the baffles (2) being coaxially arranged with the wick (1), and the baffles (2) being provided with cooling channels; The wick (1) is provided with an oxygen channel (10) and a hydrogen channel (11); along the axial direction of the wick (1), the hydrogen channel (11) is located at the upper and lower sides of the oxygen channel (10); and an oxygen injection port (100) connected to the oxygen channel (10) and a hydrogen injection port (110) connected to the hydrogen channel (11) are provided on the inner circumferential surface of the wick (1); The oxygen injection ports (100) are distributed along the circumference of the inner circular surface; the hydrogen injection ports (110) are distributed along the circumference of the inner circular surface and are located at upper and lower sides of the oxygen injection ports (100) along the axial direction of the inner circular surface.

2. The combined annular blowtorch suitable for melting, shrinking and stretching of a quartz sleeve as claimed in claim 1, characterized in that: Along the circumferential direction of the wick (1), a plurality of oxygen ports (3) are arranged on the wick (1) at equal intervals, one end of the oxygen port (3) is connected to the oxygen delivery pipeline (4), and the other end is connected to the oxygen channel (10); Along the circumferential direction of the wick (1), a plurality of hydrogen ports (5) are arranged on the wick (1) at equal intervals, one end of the hydrogen port (5) is connected to the hydrogen delivery pipeline (6), and the other end is connected to the hydrogen channels (11) located on the upper and lower sides of the oxygen channel (10).

3. The combined annular burner suitable for melting and shrinking and stretching a quartz sleeve as claimed in claim 2, characterized in that: The combined annular blowtorch further comprises an L-shaped plate (9), the ends of the oxygen delivery pipeline (4) and the hydrogen delivery pipeline (6) are mounted on the L-shaped plate (9) via pipe joints (90), and at least one of the oxygen port (3) and the hydrogen port (5) is mounted on the L-shaped plate (9).

4. The combined annular burner suitable for melting and shrinking and stretching a quartz sleeve as claimed in claim 1, characterized in that: The oxygen injection port (100) extends along the radial direction of the wick (1); The hydrogen injection port (110) is inclined inwardly along the hydrogen injection direction.

5. The combined annular burner suitable for melting and shrinking and stretching a quartz sleeve as claimed in claim 4, characterized in that: The inclination angle θ of the hydrogen injection port (110) ranges from 0 to 35°, and the inclination angle is the angle between the hydrogen injection port (110) and a plane perpendicular to the axial direction of the wick (1).

6. The combined annular burner suitable for melting and shrinking and stretching a quartz sleeve as claimed in claim 1, characterized in that: The cooling channel on the baffle (2) is welded to the cooling pipe (8).

7. The combined annular burner suitable for melting, shrinking and stretching of a quartz sleeve as claimed in claim 1, characterized in that: The baffle (2) comprises a disk body (20) stacked on the wick (1) and a heat shield (21) stacked on the disk body (20); An annular air passage (22) is formed between the disk (20) and the heat shield (21), so that the protective gas forms a gas curtain that blows toward the quartz sleeve (7).

8. The combined annular burner suitable for melting, shrinking and stretching of a quartz sleeve as claimed in claim 7, characterized in that: The disk body (20) and the heat shield (21) are both provided with cooling channels.

9. The combined annular burner suitable for melting and shrinking and stretching a quartz sleeve as claimed in any one of claims 6 to 8, characterized in that: A cold liquid input pipe (80) of a cooling pipe (8) is welded to one end of the cooling channel, and a cold liquid output pipe (81) of the cooling pipe (8) is welded to the other end of the cooling channel.

10. The combined annular burner suitable for melting, shrinking and stretching of a quartz sleeve as claimed in claim 1, characterized in that: The wicks (1) are multiple and are stacked in a uniform manner between the baffles (2); Wherein, the inner diameters of the inner circular surfaces of the wicks (1) are different; When the inner diameter of the inner circular surface of the wick (1) is smaller than the inner diameter of the baffle (2), a quartz ring (23) is provided on the inner wall of the baffle (2).

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