A quartz tube rapid welding device

Abstract

The invention relates to the technical field of quartz tube welding devices, and discloses a quartz tube rapid welding device, comprising a guide rail base, wherein an arc-shaped support component, an exhaust end and an air inlet end for supporting the quartz tube are provided on the guide rail base, the support component, the exhaust end and the air inlet end can be moved and adjusted on the guide rail base, a support wheel is provided on the support component, the support wheel is arranged along the arc surface of the support component and supports the quartz tube, the support wheel is driven by a motor, and generates friction by contact with the quartz tube to drive the quartz tube to rotate, the exhaust end and the air inlet end are respectively arranged at non-welding ends of two quartz tubes to be welded, and the exhaust end and the air inlet end are in close contact with the quartz tube, the exhaust end exhausts the air intake in the quartz tube, the exhaust amount is greater than the amount of gas fed into the quartz tube by the air inlet end, so that the air pressure in the quartz tube is less than the air pressure of the external environment of the quartz tube, the air inlet end and the exhaust end are connected by a pipeline, and the gas in the quartz tube forms an internal circulation.

Description

Technical Field

[0001] The invention relates to the technical field of quartz tube welding devices, in particular to a quartz tube rapid welding device. Background Art

[0002] Quartz tube is a special industrial technical glass made of silicon dioxide. It is a very good basic material. It has a series of excellent physical and chemical properties, such as high temperature resistance, corrosion resistance, good thermal stability, strong light transmittance and good electrical insulation. Quartz tube is widely used in heating equipment such as electric fire buckets, electric stoves, electric heaters, etc. to play a heating role. At the same time, it is also used to manufacture high-precision instruments and equipment, such as optical fibers, semiconductors, solar cells, etc. Quartz tube is a special material with high temperature and high hardness. In theory, it can be welded, but it requires special techniques and tools. By After the hydrogen and oxygen are mixed, they react with the quartz material to melt the quartz material and weld them together. The melting point of the quartz tube is about 1713℃. Commonly used methods include flame welding, high-frequency induction welding or laser welding. These methods heat the quartz tube locally and soften or melt it locally, and then use pressure or other means to make the two surfaces tightly bonded. In this process, the welding temperature will not exceed the melting point to avoid excessive thermal impact on the entire quartz tube. Before quartz welding, the material should be cleaned and treated to remove surface dirt and oxides to ensure welding quality.

[0003] When welding a large quartz tube, it is often necessary to use large machinery to weld the entire annular welding area, which is difficult to control accurately. The temperature at a single position is prone to overheating, affecting product quality. When using a single quartz torch for fine welding, the operation is difficult and it is difficult to process the entire annular welding point. In addition, the overall thermal conductivity of quartz is poor. In order to reach the melting temperature of quartz, the flame temperature of the quartz torch is high, which causes a large temperature difference in the quartz tube. The thermal stress generated during the welding process may cause tiny cracks or defects inside the quartz. At the same time, if the welded quartz tube is cooled too quickly, residual stress, cracks or uneven phase change may occur inside the quartz, thereby forming white lines. Summary of the invention

[0004] (I) Technical problems to be solved: In view of the deficiencies in the prior art, the present invention provides a quartz tube rapid welding device, which has the advantages of reducing the thermal stress formed in the quartz tube due to temperature difference and assisting welding, thereby solving the problem of cracks caused by thermal stress in quartz tube welding.

[0005] (II) Technical solution: In order to achieve the above-mentioned purpose of reducing the thermal stress of the quartz tube due to the temperature difference and assisting welding, the present invention provides the following technical solution: a quartz tube rapid welding device, comprising a guide rail base, the guide rail base is provided with an arc-shaped support component, an exhaust end and an air inlet end for supporting the quartz tube, the support component, the exhaust end and the air inlet end can be moved and adjusted on the guide rail base, the support component is provided with support wheels, the support wheels are arranged along the arc surface of the support component, and support the quartz tube, the support The support wheel is driven by a motor and generates friction by contact with the quartz tube to drive the quartz tube to rotate. The exhaust end and the air inlet end are respectively arranged at the non-welding ends of the two quartz tubes to be welded, and the exhaust end and the air inlet end are in close contact with the quartz tube. The exhaust end exhausts the air in the quartz tube, and the exhaust amount is greater than the amount of gas sent into the quartz tube by the air inlet end, so that the air pressure in the quartz tube is lower than the external environmental pressure of the quartz tube. The air inlet end is connected to the exhaust end through a pipeline, and the gas sent into the quartz tube by the air inlet end is part of the gas extracted by the exhaust end, and the gas in the quartz tube forms an internal circulation.

[0006] Preferably, after the gas in the quartz tube is collected by the exhaust end, part of the gas is sent to the air inlet end, and part of the gas is discharged to the outside through a pipeline or the waste heat of the gas is recovered and utilized.

[0007] Preferably, a guide block and an annular air inlet are provided on the side of the air inlet end facing the quartz tube, the guide block is truncated cone-shaped, and a cold air outlet is provided at the center of the air extraction end.

[0008] Preferably, the air inlet can spray air into the quartz tube from a tangential direction, and the exhaust end has at least 4 air outlets in a circular array on the side facing the quartz tube. The air outlets are arranged at the edge of the inner wall of the quartz tube, and cooperate with the air inlet to make the air flow in the tube flow in a spiral shape along the inner wall. The cold air outlet is arranged at the center of the air outlet of the circular array, and the cold air outlet extracts air at the axis center of the quartz tube.

[0009] Preferably, a baffle with adjustable inclination is provided at the air flow outlet of the air outlet, and the baffle is driven to rotate by a motor to adjust the inclination.

[0010] Preferably, a coating layer is provided on the outer side of the support wheel, and the coating layer is made of graphite.

[0011] Preferably, a synchronous belt is provided on the outer side of the support wheel, and the synchronous belt covers all the support wheels on the support assembly, and the rotation of the synchronous belt is driven by the rotation of the support wheel.

[0012] (III) Beneficial effects: Compared with the prior art, the present invention provides a quartz tube rapid welding device, which has the following beneficial effects: 1. The quartz tube rapid welding device adjusts the distance between the two quartz tubes by moving the support assembly on the guide rail base. When the worker starts welding, the exhaust end exhausts the inside of the quartz tube and the air inlet end delivers air. However, the exhaust volume is greater than the amount of gas delivered into the quartz tube by the air inlet end, so that the air pressure in the quartz tube is lower than the air pressure of the external environment of the quartz tube, so that a negative pressure environment is formed in the quartz tube. Under the negative pressure environment, the external airflow moves into the quartz tube through the gap at the welding point due to the pressure difference. This airflow movement from the outside to the inside will affect the shape of the flame ejected from the quartz flame head, and the flame will move into the weld with the airflow, so that in the process of welding the quartz tube, the welding of the inner wall area of ​​the quartz tube can be more effective. The heating improves the welding quality and increases the air temperature in the quartz tube. Because the air sent into the quartz tube at the air inlet end is the air extracted from the air extraction end, the air in the quartz tube forms an internal circulation. Because the welding flame is constantly heated, the gas temperature will continue to rise during the gas circulation process, so that the temperature of the gas sent into the air inlet end can maintain a higher temperature even if it is mixed with the air outside the quartz tube. And through the cooperation of the welding flame and the airflow, the inner wall of the quartz tube is constantly exchanged with the hot airflow to heat up the pipeline. The melting of the quartz tube is a process of continuous accumulation of heat. During the welding process, the internal circulation of the airflow is constantly heated up and the external airflow guides the flame to move inside the welding gap, so that the inner wall of the quartz tube welding is continuously heated, which effectively accelerates the welding process and gradually accelerates the melting speed of the quartz tube with the progress of welding.

[0013] 2. The quartz tube fast welding device collects the gas in the quartz tube at the exhaust end, sends part of the gas to the intake end, and discharges part of the gas to the outside through a pipeline or utilizes the waste heat. The gas that can pass through can be collected, and the gas extracted from the quartz tube is heat-exchanged with the gas fuel of the quartz burner through a heat exchanger, so that the temperature of the gas fuel is preheated before combustion. The temperature of the gas fuel will directly affect the flame temperature generated during welding. A higher gas temperature can make the surface of the quartz tube reach the required melting temperature more quickly, thereby reducing the heating time and improving the welding efficiency. The initial temperature is the temperature of the gas fuel before the flame is formed. According to the principle of combustion, the adiabatic flame temperature is the temperature of the gas fuel before the flame is formed. The highest temperature that a flame can reach under ideal conditions is related to the initial temperature. Generally, the higher the initial temperature, the higher the adiabatic flame temperature. This is because the high-temperature fuel carries more heat energy when entering the combustion zone, which helps to increase the overall temperature of the flame. During the combustion process, the high-temperature gas fuel transfers heat to the surrounding environment and combustion products through heat conduction and convection, thereby increasing the flame temperature. The higher the initial temperature of the gas fuel, the more heat it releases during the combustion process, so the higher the flame temperature. The temperature of the gas fuel may also affect the combustion rate and flame stability. A higher initial temperature may accelerate the decomposition of the fuel and the combustion reaction rate, making the flame more stable and the temperature higher.

[0014] 3. The quartz tube rapid welding device has a guide block and an annular air inlet on the side of the air inlet end facing the quartz tube, the guide block is truncated, a cold air outlet is provided at the center of the air extraction end, the air inlet can spray air into the quartz tube from a tangential direction, the air extraction end has at least one air outlet in a circumferential array on the side facing the quartz tube, the air outlet is arranged at the edge of the inner wall of the quartz tube, and the air inlet is matched with the air inlet so that the air flow in the tube flows in a spiral shape along the inner wall, the spirally flowing airflow can effectively increase the contact time and contact area between the airflow and the inner wall of the quartz tube, so that the heat exchange time between the airflow and the quartz tube is longer, which is conducive to effectively transferring the heat in the gas to the quartz tube, and at the same time, the spirally flowing airflow can drive the airflow entering from the gap outside the quartz tube to generate The circular motion guides the flame so that the shape formed by the flame pulled by the airflow is more closely matched with the shape of the quartz tube welding place, and the heating efficiency of the welding place is higher. The cold air outlet is arranged at the center of the air outlet of the circular array, and the cold air outlet extracts the air at the axis of the quartz tube. Affected by the spiral airflow and the welding temperature, the gas temperature at the axis of the quartz tube is lower than that of the outer spiral airflow. In order to avoid the outer airflow transferring heat to the inner layer and causing heat loss, the inner layer is extracted through the air-cooled outlet. A baffle with adjustable inclination is provided at the air outlet of the air outlet. The baffle is driven by a motor to rotate to adjust the inclination. By adjusting the baffle, the air extraction volume and the airflow movement path can be adjusted, making the processing process more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of the present invention is shown in FIG. Figure 1 .

[0016] Figure 2 The structure of the present invention is shown in FIG. Figure 2 .

[0017] Figure 3 This is a schematic diagram of placing a quartz tube according to the present invention.

[0018] Figure 4 It is a schematic diagram of the outer gas flow movement of the quartz tube of the present invention.

[0019] Figure 5 It is a schematic diagram of the coating layer structure of the present invention.

[0020] Figure 6 It is a schematic diagram of the synchronous belt structure of the present invention.

[0021] In the figure: 2, support assembly; 3, exhaust end; 4, air inlet end; 21, support wheel; 22, covering layer; 23, synchronous belt; 31, air outlet; 32, cold air outlet; 41, guide block; 42, air inlet; 101, guide rail base. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1-Figure 4 The quartz tube fast welding device comprises a guide rail base 101, on which an arc-shaped support component 2, an exhaust end 3 and an air inlet end 4 for supporting the quartz tube are arranged, and the support component 2, the exhaust end 3 and the air inlet end 4 can be moved and adjusted on the guide rail base 101, and a support wheel 21 is arranged on the support component 2, and the support wheel 21 is arranged along the arc surface of the support component 2 and supports the quartz tube, and the support wheel 21 is driven by a motor and generates friction by contacting with the quartz tube. The quartz tube is rubbed and rotated. The exhaust end 3 and the air inlet end 4 are respectively arranged at the non-welding ends of the two quartz tubes to be welded, and the exhaust end 3 and the air inlet end 4 are in close contact with the quartz tube. The exhaust end 3 exhausts the air in the quartz tube, and the exhaust amount is greater than the amount of gas sent into the quartz tube by the air inlet end 4, so that the air pressure in the quartz tube is lower than the air pressure of the external environment of the quartz tube. The air inlet end 4 is connected to the exhaust end 3 through a pipeline, and the gas sent into the quartz tube by the air inlet end 4 is part of the gas extracted from the exhaust end 3, and the gas in the quartz tube forms an internal circulation.

[0024] The quartz tube is placed on the support assembly 2, and the distance between the two quartz tubes is adjusted by moving the support assembly 2 on the guide rail base 101. When the worker starts welding, the exhaust end 3 exhausts the inside of the quartz tube, and the air inlet end 4 supplies air, but the exhaust volume is greater than the amount of gas supplied into the quartz tube by the air inlet end 4, so that the air pressure in the quartz tube is lower than the air pressure of the external environment of the quartz tube, so that a negative pressure environment is formed in the quartz tube. Under the negative pressure environment, the external airflow moves into the quartz tube through the gap at the welding point due to the pressure difference. This airflow movement from the outside to the inside will affect the shape of the flame ejected from the quartz flame, and the flame will move into the weld with the airflow, so that in the process of welding the quartz tube, the welding point of the inner wall area of ​​the quartz tube can be more effectively heated, thereby improving the welding quality and making the inside of the quartz tube The air temperature rises, and because the air sent into the quartz tube by the air inlet end 4 is the air extracted by the air extraction end 3, the air in the quartz tube forms an internal circulation. Because the welding flame is constantly heated, the gas temperature will continue to rise during the gas circulation process, so that the temperature of the gas sent into the air inlet end 4 can maintain a relatively high temperature even if it is mixed with the air outside the quartz tube. In addition, through the cooperation of the welding flame and the airflow, the inner wall of the quartz tube is constantly exchanged with the hot airflow, so that the temperature of the pipeline is increased. The melting of the quartz tube is a process of continuous accumulation of heat. During the welding process, the internal circulation of the airflow is constantly heated up and the external airflow guides the flame to move inside the welding gap, so that the inner wall of the quartz tube welding point is continuously heated up, which effectively accelerates the welding process and gradually accelerates the melting speed of the quartz tube with the progress of welding.

[0025] After the gas in the quartz tube is collected by the exhaust end 3, part of the gas is sent to the air inlet end 4, and part of the gas is discharged to the outside through a pipeline or the waste heat is utilized. The gas that can pass through can be collected, and the gas extracted from the quartz tube is heat-exchanged with the gas fuel of the quartz burner through a heat exchanger, so that the temperature of the gas fuel is preheated before combustion. The temperature of the gas fuel will directly affect the flame temperature generated during welding. A higher gas temperature can make the surface of the quartz tube reach the required melting temperature more quickly, thereby reducing the heating time and improving the welding efficiency. The initial temperature is the temperature of the gas fuel before the flame is formed. According to the principle of combustion, the adiabatic flame temperature is the ideal temperature under no heat loss. The maximum temperature that a flame can reach under certain conditions is related to the initial temperature. Generally, the higher the initial temperature, the higher the adiabatic flame temperature. This is because the high-temperature fuel has carried more heat energy when entering the combustion zone, which helps to increase the overall temperature of the flame. During the combustion process, the high-temperature gas fuel transfers heat to the surrounding environment and combustion products through heat conduction and convection, thereby increasing the flame temperature. The higher the initial temperature of the gas fuel, the more heat it releases during the combustion process, so the higher the flame temperature. The temperature of the gas fuel may also affect the combustion rate and flame stability. A higher initial temperature may accelerate the decomposition of the fuel and the combustion reaction rate, making the flame more stable and the temperature higher.

[0026] A guide block 41 and an annular air inlet 41 are provided on the side of the air inlet end 4 facing the quartz tube. The guide block 41 is truncated cone-shaped. A cold air outlet 32 ​​is provided at the center of the air extraction end 3 .

[0027] The air inlet 41 can spray air into the quartz tube from a tangential direction. The air extraction end 3 has at least four air outlets 31 in a circumferential array on a side facing the quartz tube. The air outlets 31 are arranged at the edge of the inner wall of the quartz tube. By cooperating with the air inlet 41, the air flow in the tube flows in a spiral shape along the inner wall. The spirally flowing airflow can effectively increase the contact time and contact area between the airflow and the inner wall of the quartz tube, so that the heat exchange time between the airflow and the quartz tube is longer, which is conducive to effectively transferring the heat in the gas to the quartz tube. At the same time, the spirally flowing airflow can drive the airflow entering from the gap outside the quartz tube to produce a circular motion, guide the flame, and make the shape of the flame pulled by the airflow to be consistent with the quartz tube. The formation of the pipe welding joint is more fitting, and the heating efficiency of the welding joint is higher. The cold air outlet 32 ​​is arranged at the center of the air outlet 31 of the circular array. The cold air outlet 32 ​​extracts the air at the axis of the quartz tube. Affected by the spiral airflow and the welding temperature, the gas temperature at the axis of the quartz tube is lower than the temperature of the outer spiral airflow. In order to avoid the outer airflow transferring heat to the inner layer and causing heat loss, the inner layer is extracted through the air-cooled outlet. A baffle with adjustable inclination is provided at the air flow outlet of the air outlet 31. The baffle is driven by a motor to rotate to adjust the inclination. By adjusting the baffle, the air extraction volume and the airflow movement path can be adjusted, making the processing process more flexible.

[0028] See also Figure 5 The outer side of the support wheel 21 is provided with a coating layer 22, and the coating layer 22 is made of graphite. Graphite has good high temperature resistance and can withstand long-term work in a high temperature environment. At the same time, graphite also has a certain lubricity, which can reduce the friction between the support wheel and the quartz tube and reduce wear. The graphite material is relatively soft, which reduces the wear caused by the collision of the quartz tube. The support wheel 21 is used to drive the quartz tube to rotate, which can make the welding of large quartz tubes easier and more efficient.

[0029] Example 2: Please refer to Figure 1-Figure 4The quartz tube fast welding device comprises a guide rail base 101, on which an arc-shaped support component 2, an exhaust end 3 and an air inlet end 4 for supporting the quartz tube are arranged, and the support component 2, the exhaust end 3 and the air inlet end 4 can be moved and adjusted on the guide rail base 101, and a support wheel 21 is arranged on the support component 2, and the support wheel 21 is arranged along the arc surface of the support component 2 and supports the quartz tube, and the support wheel 21 is driven by a motor and generates friction by contacting with the quartz tube. The quartz tube is rubbed and rotated. The exhaust end 3 and the air inlet end 4 are respectively arranged at the non-welding ends of the two quartz tubes to be welded, and the exhaust end 3 and the air inlet end 4 are in close contact with the quartz tube. The exhaust end 3 exhausts the air in the quartz tube, and the exhaust amount is greater than the amount of gas sent into the quartz tube by the air inlet end 4, so that the air pressure in the quartz tube is lower than the air pressure of the external environment of the quartz tube. The air inlet end 4 is connected to the exhaust end 3 through a pipeline, and the gas sent into the quartz tube by the air inlet end 4 is part of the gas extracted from the exhaust end 3, and the gas in the quartz tube forms an internal circulation.

[0030] The quartz tube is placed on the support assembly 2, and the distance between the two quartz tubes is adjusted by moving the support assembly 2 on the guide rail base 101. When the worker starts welding, the exhaust end 3 exhausts the inside of the quartz tube, and the air inlet end 4 supplies air, but the exhaust volume is greater than the amount of gas supplied into the quartz tube by the air inlet end 4, so that the air pressure in the quartz tube is lower than the air pressure of the external environment of the quartz tube, so that a negative pressure environment is formed in the quartz tube. Under the negative pressure environment, the external airflow moves into the quartz tube through the gap at the welding point due to the pressure difference. This airflow movement from the outside to the inside will affect the shape of the flame ejected from the quartz flame, and the flame will move into the weld with the airflow, so that in the process of welding the quartz tube, the welding point of the inner wall area of ​​the quartz tube can be more effectively heated, thereby improving the welding quality and making the inside of the quartz tube The air temperature rises, and because the air sent into the quartz tube by the air inlet end 4 is the air extracted by the air extraction end 3, the air in the quartz tube forms an internal circulation. Because the welding flame is constantly heated, the gas temperature will continue to rise during the gas circulation process, so that the temperature of the gas sent into the air inlet end 4 can maintain a relatively high temperature even if it is mixed with the air outside the quartz tube. In addition, through the cooperation of the welding flame and the airflow, the inner wall of the quartz tube is constantly exchanged with the hot airflow, so that the temperature of the pipeline is increased. The melting of the quartz tube is a process of continuous accumulation of heat. During the welding process, the internal circulation of the airflow is constantly heated up and the external airflow guides the flame to move inside the welding gap, so that the inner wall of the quartz tube welding point is continuously heated up, which effectively accelerates the welding process and gradually accelerates the melting speed of the quartz tube with the progress of welding.

[0031] After the gas in the quartz tube is collected by the exhaust end 3, part of the gas is sent to the air inlet end 4, and part of the gas is discharged to the outside through a pipeline or the waste heat is utilized. The gas that can pass through can be collected, and the gas extracted from the quartz tube is heat-exchanged with the gas fuel of the quartz burner through a heat exchanger, so that the temperature of the gas fuel is preheated before combustion. The temperature of the gas fuel will directly affect the flame temperature generated during welding. A higher gas temperature can make the surface of the quartz tube reach the required melting temperature more quickly, thereby reducing the heating time and improving the welding efficiency. The initial temperature is the temperature of the gas fuel before the flame is formed. According to the principle of combustion, the adiabatic flame temperature is the ideal temperature under no heat loss. The maximum temperature that a flame can reach under certain conditions is related to the initial temperature. Generally, the higher the initial temperature, the higher the adiabatic flame temperature. This is because the high-temperature fuel has carried more heat energy when entering the combustion zone, which helps to increase the overall temperature of the flame. During the combustion process, the high-temperature gas fuel transfers heat to the surrounding environment and combustion products through heat conduction and convection, thereby increasing the flame temperature. The higher the initial temperature of the gas fuel, the more heat it releases during the combustion process, so the higher the flame temperature. The temperature of the gas fuel may also affect the combustion rate and flame stability. A higher initial temperature may accelerate the decomposition of the fuel and the combustion reaction rate, making the flame more stable and the temperature higher.

[0032] A guide block 41 and an annular air inlet 41 are provided on the side of the air inlet end 4 facing the quartz tube. The guide block 41 is truncated cone-shaped. A cold air outlet 32 ​​is provided at the center of the air extraction end 3 .

[0033] The air inlet 41 can spray air into the quartz tube from a tangential direction. The air extraction end 3 has at least four air outlets 31 in a circumferential array on a side facing the quartz tube. The air outlets 31 are arranged at the edge of the inner wall of the quartz tube. By cooperating with the air inlet 41, the air flow in the tube flows in a spiral shape along the inner wall. The spirally flowing airflow can effectively increase the contact time and contact area between the airflow and the inner wall of the quartz tube, so that the heat exchange time between the airflow and the quartz tube is longer, which is conducive to effectively transferring the heat in the gas to the quartz tube. At the same time, the spirally flowing airflow can drive the airflow entering from the gap outside the quartz tube to produce a circular motion, guide the flame, and make the shape of the flame pulled by the airflow to be consistent with the quartz tube. The formation of the pipe welding joint is more fitting, and the heating efficiency of the welding joint is higher. The cold air outlet 32 ​​is arranged at the center of the air outlet 31 of the circular array. The cold air outlet 32 ​​extracts the air at the axis of the quartz tube. Affected by the spiral airflow and the welding temperature, the gas temperature at the axis of the quartz tube is lower than the temperature of the outer spiral airflow. In order to avoid the outer airflow transferring heat to the inner layer and causing heat loss, the inner layer is extracted through the air-cooled outlet. A baffle with adjustable inclination is provided at the air flow outlet of the air outlet 31. The baffle is driven by a motor to rotate to adjust the inclination. By adjusting the baffle, the air extraction volume and the airflow movement path can be adjusted, making the processing process more flexible.

[0034] See also Figure 6 A synchronous belt 23 is provided on the outside of the support wheel 21, and the synchronous belt 23 covers all the support wheels 21 on the support assembly 2. The rotation of the support wheel 21 drives the synchronous belt 23 to rotate. The support wheel 21 and the synchronous belt 23 cooperate to drive the quartz tube to rotate. When welding large quartz tubes, it can be easier and more efficient, and the motor power required for the synchronous belt 23 to drive the quartz tube to rotate is smaller.

[0035] Working principle: Place the quartz tube on the support assembly 2, and adjust the distance between the two quartz tubes by moving the support assembly 2 on the guide rail base 101. When the worker starts welding, the exhaust end 3 exhausts the quartz tube, and the air inlet end 4 supplies air, but the exhaust volume is greater than the amount of gas supplied into the quartz tube by the air inlet end 4, so that the air pressure in the quartz tube is lower than the air pressure of the external environment of the quartz tube, so that a negative pressure environment is formed in the quartz tube. Under the negative pressure environment, the external airflow moves into the quartz tube through the gap at the welding point due to the pressure difference. This airflow movement from the outside to the inside will affect the shape of the flame ejected by the quartz flame, and the flame will move into the weld with the airflow, so that in the process of welding the quartz tube, the welding point of the inner wall area of ​​the quartz tube can be more effectively heated, thereby improving the welding quality and making the inside of the quartz tube The air temperature rises, and because the air sent into the quartz tube by the air inlet end 4 is the air extracted by the air extraction end 3, the air in the quartz tube forms an internal circulation. Because the welding flame is constantly heated, the gas temperature will continue to rise during the gas circulation process, so that the temperature of the gas sent into the air inlet end 4 can maintain a relatively high temperature even if it is mixed with the air outside the quartz tube. In addition, through the cooperation of the welding flame and the airflow, the inner wall of the quartz tube is constantly exchanged with the hot airflow, so that the temperature of the pipeline is increased. The melting of the quartz tube is a process of continuous accumulation of heat. During the welding process, the internal circulation of the airflow is constantly heated up and the external airflow guides the flame to move inside the welding gap, so that the inner wall of the quartz tube welding point is continuously heated up, which effectively accelerates the welding process and gradually accelerates the melting speed of the quartz tube with the progress of welding.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. 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 existence of other identical elements in the process, method, article or device including the elements.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quartz tube rapid welding device, comprising a guide rail base (101), wherein the guide rail base (101) is provided with an arc-shaped support component (2), an exhaust end (3) and an air inlet end (4) for supporting the quartz tube, wherein the support component (2), the exhaust end (3) and the air inlet end (4) can be moved and adjusted on the guide rail base (101), characterized in that: The support assembly (2) is provided with a support wheel (21), the support wheel (21) is arranged along the arc surface of the support assembly (2) and supports the quartz tube. The support wheel (21) is driven by a motor and generates friction by contact with the quartz tube, thereby driving the quartz tube to rotate. The exhaust end (3) and the air inlet end (4) are respectively arranged at the non-welding ends of the two quartz tubes to be welded, and the exhaust end (3) and the air inlet end (4) are in close contact with the quartz tube. The exhaust end (3) exhausts air from the quartz tube, and the exhaust amount is greater than the amount of gas sent into the quartz tube by the air inlet end (4), so that the air pressure in the quartz tube is lower than the air pressure of the external environment of the quartz tube. The air inlet end (4) is connected to the exhaust end (3) by a pipeline, and the gas sent into the quartz tube by the air inlet end (4) is part of the gas extracted by the exhaust end (3), and the gas in the quartz tube forms an internal circulation.

2. A quartz tube rapid welding device according to claim 1, characterized in that: After the gas in the quartz tube is collected at the gas extraction end (3), part of the gas is sent to the gas inlet end (4), and part of the gas is discharged to the outside through a pipeline or the waste heat of the gas is recovered and utilized.

3. A quartz tube rapid welding device according to claim 1, characterized in that: A guide block (41) and an annular air inlet (42) are provided on the side of the air inlet end (4) facing the quartz tube, the guide block (41) is truncated cone-shaped, and a cold air outlet (32) is provided at the center of the air extraction end (3).

4. A quartz tube rapid welding device according to claim 3, characterized in that: The air inlet (42) is capable of spraying air into the quartz tube from a tangential direction. The exhaust end (3) has at least four air outlets (31) in a circular array on a side facing the quartz tube. The air outlets (31) are arranged at the edge of the inner wall of the quartz tube. By cooperating with the air inlet (42), the air flow in the tube flows in a spiral shape along the inner wall. The cold air outlet (32) is arranged at the center of the air outlet (31) in the circular array. The cold air outlet (32) extracts air at the axis of the quartz tube.

5. A quartz tube rapid welding device according to claim 4, characterized in that: A baffle with adjustable inclination is provided at the air flow outlet of the air outlet (31), and the baffle is driven to rotate by a motor to adjust the inclination.

6. A quartz tube rapid welding device according to any one of claims 1 to 5, characterized in that: A coating layer (22) is provided on the outer side of the support wheel (21), and the coating layer (22) is made of graphite.

7. A quartz tube rapid welding device according to any one of claims 1 to 5, characterized in that: A synchronous belt (23) is provided on the outside of the support wheel (21); the synchronous belt (23) covers all the support wheels (21) on the support assembly (2); and the rotation of the support wheel (21) drives the synchronous belt (23) to rotate.

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